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Comparing Coro/Coro/State.xs (file contents):
Revision 1.280 by root, Sun Nov 16 09:43:18 2008 UTC vs.
Revision 1.409 by root, Sun Jun 12 04:29:15 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
1#include "libcoro/coro.c" 6#include "libcoro/coro.c"
2 7
3#define PERL_NO_GET_CONTEXT 8#define PERL_NO_GET_CONTEXT
4#define PERL_EXT 9#define PERL_EXT
5 10
6#include "EXTERN.h" 11#include "EXTERN.h"
7#include "perl.h" 12#include "perl.h"
8#include "XSUB.h" 13#include "XSUB.h"
9#include "perliol.h" 14#include "perliol.h"
10 15
11#include "patchlevel.h" 16#include "schmorp.h"
17#include "ecb.h"
12 18
19#include <stddef.h>
13#include <stdio.h> 20#include <stdio.h>
14#include <errno.h> 21#include <errno.h>
15#include <assert.h> 22#include <assert.h>
16 23
17#ifdef WIN32 24#ifndef SVs_PADSTALE
25# define SVs_PADSTALE 0
26#endif
27
28#if defined(_WIN32)
29# undef HAS_GETTIMEOFDAY
18# undef setjmp 30# undef setjmp
19# undef longjmp 31# undef longjmp
20# undef _exit 32# undef _exit
21# define setjmp _setjmp // deep magic, don't ask 33# define setjmp _setjmp /* deep magic */
22#else 34#else
23# include <inttypes.h> /* most portable stdint.h */ 35# include <inttypes.h> /* most portable stdint.h */
24#endif 36#endif
25 37
26#ifdef HAVE_MMAP 38#ifdef HAVE_MMAP
… …
51#endif 63#endif
52 64
53/* the maximum number of idle cctx that will be pooled */ 65/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4; 66static int cctx_max_idle = 4;
55 67
56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
63# ifndef PL_ppaddr
64# define PL_ppaddr ppaddr
65# endif
66# ifndef call_sv
67# define call_sv perl_call_sv
68# endif
69# ifndef get_sv
70# define get_sv perl_get_sv
71# endif
72# ifndef get_cv
73# define get_cv perl_get_cv
74# endif
75# ifndef IS_PADGV
76# define IS_PADGV(v) 0
77# endif
78# ifndef IS_PADCONST
79# define IS_PADCONST(v) 0
80# endif
81#endif
82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100
101/* 5.8.7 */
102#ifndef SvRV_set
103# define SvRV_set(s,v) SvRV(s) = (v)
104#endif
105
106#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 68#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
107# undef CORO_STACKGUARD 69# undef CORO_STACKGUARD
108#endif 70#endif
109 71
110#ifndef CORO_STACKGUARD 72#ifndef CORO_STACKGUARD
… …
117#endif 79#endif
118 80
119/* The next macros try to return the current stack pointer, in an as 81/* The next macros try to return the current stack pointer, in an as
120 * portable way as possible. */ 82 * portable way as possible. */
121#if __GNUC__ >= 4 83#if __GNUC__ >= 4
84# define dSTACKLEVEL int stacklevel_dummy
122# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0) 85# define STACKLEVEL __builtin_frame_address (0)
123#else 86#else
124# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel 87# define dSTACKLEVEL volatile void *stacklevel
88# define STACKLEVEL ((void *)&stacklevel)
125#endif 89#endif
126 90
127#define IN_DESTRUCT (PL_main_cv == Nullcv) 91#define IN_DESTRUCT PL_dirty
128
129#if __GNUC__ >= 3
130# define attribute(x) __attribute__(x)
131# define expect(expr,value) __builtin_expect ((expr),(value))
132# define INLINE static inline
133#else
134# define attribute(x)
135# define expect(expr,value) (expr)
136# define INLINE static
137#endif
138
139#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1)
141
142#define NOINLINE attribute ((noinline))
143 92
144#include "CoroAPI.h" 93#include "CoroAPI.h"
94#define GCoroAPI (&coroapi) /* very sneaky */
145 95
146#ifdef USE_ITHREADS 96#ifdef USE_ITHREADS
147# if CORO_PTHREAD 97# if CORO_PTHREAD
148static void *coro_thx; 98static void *coro_thx;
149# endif 99# endif
150#endif 100#endif
151 101
152/* helper storage struct for Coro::AIO */ 102/* used in state.h */
153struct io_state 103#define VAR(name,type) VARx(name, PL_ ## name, type)
154{ 104
155 AV *res; 105#ifdef __linux
156 int errorno; 106# include <time.h> /* for timespec */
157 I32 laststype; /* U16 in 5.10.0 */ 107# include <syscall.h> /* for SYS_* */
158 int laststatval; 108# ifdef SYS_clock_gettime
159 Stat_t statcache; 109# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
160}; 110# define CORO_CLOCK_MONOTONIC 1
111# define CORO_CLOCK_THREAD_CPUTIME_ID 3
112# endif
113#endif
161 114
162static double (*nvtime)(); /* so why doesn't it take void? */ 115static double (*nvtime)(); /* so why doesn't it take void? */
116static void (*u2time)(pTHX_ UV ret[2]);
117
118/* we hijack an hopefully unused CV flag for our purposes */
119#define CVf_SLF 0x4000
120static OP *pp_slf (pTHX);
121static void slf_destroy (pTHX_ struct coro *coro);
163 122
164static U32 cctx_gen; 123static U32 cctx_gen;
165static size_t cctx_stacksize = CORO_STACKSIZE; 124static size_t cctx_stacksize = CORO_STACKSIZE;
166static struct CoroAPI coroapi; 125static struct CoroAPI coroapi;
167static AV *main_mainstack; /* used to differentiate between $main and others */ 126static AV *main_mainstack; /* used to differentiate between $main and others */
168static JMPENV *main_top_env; 127static JMPENV *main_top_env;
169static HV *coro_state_stash, *coro_stash; 128static HV *coro_state_stash, *coro_stash;
170static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */ 129static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
171static volatile struct coro *transfer_next; 130
131static AV *av_destroy; /* destruction queue */
132static SV *sv_manager; /* the manager coro */
133static SV *sv_idle; /* $Coro::idle */
172 134
173static GV *irsgv; /* $/ */ 135static GV *irsgv; /* $/ */
174static GV *stdoutgv; /* *STDOUT */ 136static GV *stdoutgv; /* *STDOUT */
175static SV *rv_diehook; 137static SV *rv_diehook;
176static SV *rv_warnhook; 138static SV *rv_warnhook;
177static HV *hv_sig; /* %SIG */ 139static HV *hv_sig; /* %SIG */
178 140
179/* async_pool helper stuff */ 141/* async_pool helper stuff */
180static SV *sv_pool_rss; 142static SV *sv_pool_rss;
181static SV *sv_pool_size; 143static SV *sv_pool_size;
144static SV *sv_async_pool_idle; /* description string */
182static AV *av_async_pool; 145static AV *av_async_pool; /* idle pool */
146static SV *sv_Coro; /* class string */
147static CV *cv_pool_handler;
183 148
184/* Coro::AnyEvent */ 149/* Coro::AnyEvent */
185static SV *sv_activity; 150static SV *sv_activity;
186 151
152/* enable processtime/realtime profiling */
153static char enable_times;
154typedef U32 coro_ts[2];
155static coro_ts time_real, time_cpu;
156static char times_valid;
157
187static struct coro_cctx *cctx_first; 158static struct coro_cctx *cctx_first;
188static int cctx_count, cctx_idle; 159static int cctx_count, cctx_idle;
189 160
190enum { 161enum
162{
191 CC_MAPPED = 0x01, 163 CC_MAPPED = 0x01,
192 CC_NOREUSE = 0x02, /* throw this away after tracing */ 164 CC_NOREUSE = 0x02, /* throw this away after tracing */
193 CC_TRACE = 0x04, 165 CC_TRACE = 0x04,
194 CC_TRACE_SUB = 0x08, /* trace sub calls */ 166 CC_TRACE_SUB = 0x08, /* trace sub calls */
195 CC_TRACE_LINE = 0x10, /* trace each statement */ 167 CC_TRACE_LINE = 0x10, /* trace each statement */
… …
216 int valgrind_id; 188 int valgrind_id;
217#endif 189#endif
218 unsigned char flags; 190 unsigned char flags;
219} coro_cctx; 191} coro_cctx;
220 192
193static coro_cctx *cctx_current; /* the currently running cctx */
194
195/*****************************************************************************/
196
197static MGVTBL coro_state_vtbl;
198
221enum { 199enum
200{
222 CF_RUNNING = 0x0001, /* coroutine is running */ 201 CF_RUNNING = 0x0001, /* coroutine is running */
223 CF_READY = 0x0002, /* coroutine is ready */ 202 CF_READY = 0x0002, /* coroutine is ready */
224 CF_NEW = 0x0004, /* has never been switched to */ 203 CF_NEW = 0x0004, /* has never been switched to */
225 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 204 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
205 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
206 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
226}; 207};
227 208
228/* the structure where most of the perl state is stored, overlaid on the cxstack */ 209/* the structure where most of the perl state is stored, overlaid on the cxstack */
229typedef struct 210typedef struct
230{ 211{
231 SV *defsv;
232 AV *defav;
233 SV *errsv;
234 SV *irsgv;
235#define VAR(name,type) type name; 212#define VARx(name,expr,type) type name;
236# include "state.h" 213# include "state.h"
237#undef VAR 214#undef VARx
238} perl_slots; 215} perl_slots;
239 216
217// how many context stack entries do we need for perl_slots
240#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 218#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
241 219
242/* this is a structure representing a perl-level coroutine */ 220/* this is a structure representing a perl-level coroutine */
243struct coro { 221struct coro
222{
244 /* the C coroutine allocated to this perl coroutine, if any */ 223 /* the C coroutine allocated to this perl coroutine, if any */
245 coro_cctx *cctx; 224 coro_cctx *cctx;
246 225
247 /* process data */ 226 /* ready queue */
227 struct coro *next_ready;
228
229 /* state data */
248 struct CoroSLF slf_frame; /* saved slf frame */ 230 struct CoroSLF slf_frame; /* saved slf frame */
249 AV *mainstack; 231 AV *mainstack;
250 perl_slots *slot; /* basically the saved sp */ 232 perl_slots *slot; /* basically the saved sp */
251 233
234 CV *startcv; /* the CV to execute */
252 AV *args; /* data associated with this coroutine (initial args) */ 235 AV *args; /* data associated with this coroutine (initial args) */
253 int refcnt; /* coroutines are refcounted, yes */
254 int flags; /* CF_ flags */ 236 int flags; /* CF_ flags */
255 HV *hv; /* the perl hash associated with this coro, if any */ 237 HV *hv; /* the perl hash associated with this coro, if any */
256 void (*on_destroy)(pTHX_ struct coro *coro);
257 238
258 /* statistics */ 239 /* statistics */
259 int usecount; /* number of transfers to this coro */ 240 int usecount; /* number of transfers to this coro */
260 241
261 /* coro process data */ 242 /* coro process data */
262 int prio; 243 int prio;
263 SV *throw; /* exception to be thrown */ 244 SV *except; /* exception to be thrown */
245 SV *rouse_cb; /* last rouse callback */
246 AV *on_destroy; /* callbacks or coros to notify on destroy */
247 AV *status; /* the exit status list */
264 248
265 /* async_pool */ 249 /* async_pool */
266 SV *saved_deffh; 250 SV *saved_deffh;
251 SV *invoke_cb;
252 AV *invoke_av;
253
254 /* on_enter/on_leave */
255 AV *on_enter;
256 AV *on_leave;
257
258 /* swap_sv */
259 AV *swap_sv;
260
261 /* times */
262 coro_ts t_cpu, t_real;
267 263
268 /* linked list */ 264 /* linked list */
269 struct coro *next, *prev; 265 struct coro *next, *prev;
270}; 266};
271 267
272typedef struct coro *Coro__State; 268typedef struct coro *Coro__State;
273typedef struct coro *Coro__State_or_hashref; 269typedef struct coro *Coro__State_or_hashref;
274 270
271/* the following variables are effectively part of the perl context */
272/* and get copied between struct coro and these variables */
273/* the main reason we don't support windows process emulation */
275static struct CoroSLF slf_frame; /* the current slf frame */ 274static struct CoroSLF slf_frame; /* the current slf frame */
276 275
277/** Coro ********************************************************************/ 276/** Coro ********************************************************************/
278 277
279#define PRIO_MAX 3 278#define CORO_PRIO_MAX 3
280#define PRIO_HIGH 1 279#define CORO_PRIO_HIGH 1
281#define PRIO_NORMAL 0 280#define CORO_PRIO_NORMAL 0
282#define PRIO_LOW -1 281#define CORO_PRIO_LOW -1
283#define PRIO_IDLE -3 282#define CORO_PRIO_IDLE -3
284#define PRIO_MIN -4 283#define CORO_PRIO_MIN -4
285 284
286/* for Coro.pm */ 285/* for Coro.pm */
287static SV *coro_current; 286static SV *coro_current;
288static SV *coro_readyhook; 287static SV *coro_readyhook;
289static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1]; 288static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
289static CV *cv_coro_run;
290static struct coro *coro_first; 290static struct coro *coro_first;
291#define coro_nready coroapi.nready 291#define coro_nready coroapi.nready
292 292
293/** JIT *********************************************************************/
294
295#if CORO_JIT
296 #ifndef CORO_JIT_TYPE
297 #if __x86_64 && (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris)
298 #define CORO_JIT_TYPE "amd64-unix"
299 typedef void (*load_save_perl_slots_type)(perl_slots *);
300 #elif __i386 && (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris)
301 #define CORO_JIT_TYPE "x86-unix"
302 typedef void (*load_save_perl_slots_type)(perl_slots *);
303 #else
304 x x x x
305 #undef CORO_JIT
306 #endif
307 #endif
308#endif
309
310#if CORO_JIT
311static load_save_perl_slots_type load_perl_slots, save_perl_slots;
312#endif
313
314/** Coro::Select ************************************************************/
315
316static OP *(*coro_old_pp_sselect) (pTHX);
317static SV *coro_select_select;
318
319/* horrible hack, but if it works... */
320static OP *
321coro_pp_sselect (pTHX)
322{
323 dSP;
324 PUSHMARK (SP - 4); /* fake argument list */
325 XPUSHs (coro_select_select);
326 PUTBACK;
327
328 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
329 PL_op->op_flags |= OPf_STACKED;
330 PL_op->op_private = 0;
331 return PL_ppaddr [OP_ENTERSUB](aTHX);
332}
333
334/** time stuff **************************************************************/
335
336#ifdef HAS_GETTIMEOFDAY
337
338ECB_INLINE void
339coro_u2time (pTHX_ UV ret[2])
340{
341 struct timeval tv;
342 gettimeofday (&tv, 0);
343
344 ret [0] = tv.tv_sec;
345 ret [1] = tv.tv_usec;
346}
347
348ECB_INLINE double
349coro_nvtime ()
350{
351 struct timeval tv;
352 gettimeofday (&tv, 0);
353
354 return tv.tv_sec + tv.tv_usec * 1e-6;
355}
356
357ECB_INLINE void
358time_init (pTHX)
359{
360 nvtime = coro_nvtime;
361 u2time = coro_u2time;
362}
363
364#else
365
366ECB_INLINE void
367time_init (pTHX)
368{
369 SV **svp;
370
371 require_pv ("Time/HiRes.pm");
372
373 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
374
375 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
376 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
377
378 nvtime = INT2PTR (double (*)(), SvIV (*svp));
379
380 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
381 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
382}
383
384#endif
385
293/** lowlevel stuff **********************************************************/ 386/** lowlevel stuff **********************************************************/
294 387
295static SV * 388static SV * ecb_noinline
296coro_get_sv (pTHX_ const char *name, int create) 389coro_get_sv (pTHX_ const char *name, int create)
297{ 390{
298#if PERL_VERSION_ATLEAST (5,10,0) 391#if PERL_VERSION_ATLEAST (5,10,0)
299 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 392 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
300 get_sv (name, create); 393 get_sv (name, create);
301#endif 394#endif
302 return get_sv (name, create); 395 return get_sv (name, create);
303} 396}
304 397
305static AV * 398static AV * ecb_noinline
306coro_get_av (pTHX_ const char *name, int create) 399coro_get_av (pTHX_ const char *name, int create)
307{ 400{
308#if PERL_VERSION_ATLEAST (5,10,0) 401#if PERL_VERSION_ATLEAST (5,10,0)
309 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 402 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
310 get_av (name, create); 403 get_av (name, create);
311#endif 404#endif
312 return get_av (name, create); 405 return get_av (name, create);
313} 406}
314 407
315static HV * 408static HV * ecb_noinline
316coro_get_hv (pTHX_ const char *name, int create) 409coro_get_hv (pTHX_ const char *name, int create)
317{ 410{
318#if PERL_VERSION_ATLEAST (5,10,0) 411#if PERL_VERSION_ATLEAST (5,10,0)
319 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 412 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
320 get_hv (name, create); 413 get_hv (name, create);
321#endif 414#endif
322 return get_hv (name, create); 415 return get_hv (name, create);
323} 416}
324 417
325static AV * 418ECB_INLINE void
419coro_times_update ()
420{
421#ifdef coro_clock_gettime
422 struct timespec ts;
423
424 ts.tv_sec = ts.tv_nsec = 0;
425 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
426 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
427
428 ts.tv_sec = ts.tv_nsec = 0;
429 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
430 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
431#else
432 dTHX;
433 UV tv[2];
434
435 u2time (aTHX_ tv);
436 time_real [0] = tv [0];
437 time_real [1] = tv [1] * 1000;
438#endif
439}
440
441ECB_INLINE void
442coro_times_add (struct coro *c)
443{
444 c->t_real [1] += time_real [1];
445 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
446 c->t_real [0] += time_real [0];
447
448 c->t_cpu [1] += time_cpu [1];
449 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
450 c->t_cpu [0] += time_cpu [0];
451}
452
453ECB_INLINE void
454coro_times_sub (struct coro *c)
455{
456 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
457 c->t_real [1] -= time_real [1];
458 c->t_real [0] -= time_real [0];
459
460 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
461 c->t_cpu [1] -= time_cpu [1];
462 c->t_cpu [0] -= time_cpu [0];
463}
464
465/*****************************************************************************/
466/* magic glue */
467
468#define CORO_MAGIC_type_cv 26
469#define CORO_MAGIC_type_state PERL_MAGIC_ext
470
471#define CORO_MAGIC_NN(sv, type) \
472 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
473 ? SvMAGIC (sv) \
474 : mg_find (sv, type))
475
476#define CORO_MAGIC(sv, type) \
477 (ecb_expect_true (SvMAGIC (sv)) \
478 ? CORO_MAGIC_NN (sv, type) \
479 : 0)
480
481#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
482#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
483
484ECB_INLINE MAGIC *
485SvSTATEhv_p (pTHX_ SV *coro)
486{
487 MAGIC *mg;
488
489 if (ecb_expect_true (
490 SvTYPE (coro) == SVt_PVHV
491 && (mg = CORO_MAGIC_state (coro))
492 && mg->mg_virtual == &coro_state_vtbl
493 ))
494 return mg;
495
496 return 0;
497}
498
499ECB_INLINE struct coro *
500SvSTATE_ (pTHX_ SV *coro)
501{
502 MAGIC *mg;
503
504 if (SvROK (coro))
505 coro = SvRV (coro);
506
507 mg = SvSTATEhv_p (aTHX_ coro);
508 if (!mg)
509 croak ("Coro::State object required");
510
511 return (struct coro *)mg->mg_ptr;
512}
513
514#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
515
516/* faster than SvSTATE, but expects a coroutine hv */
517#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
518#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
519
520/*****************************************************************************/
521/* padlist management and caching */
522
523ECB_INLINE AV *
326coro_clone_padlist (pTHX_ CV *cv) 524coro_derive_padlist (pTHX_ CV *cv)
327{ 525{
328 AV *padlist = CvPADLIST (cv); 526 AV *padlist = CvPADLIST (cv);
329 AV *newpadlist, *newpad; 527 AV *newpadlist, *newpad;
330 528
331 newpadlist = newAV (); 529 newpadlist = newAV ();
… …
336 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 534 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
337#endif 535#endif
338 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 536 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
339 --AvFILLp (padlist); 537 --AvFILLp (padlist);
340 538
341 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE))); 539 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
342 av_store (newpadlist, 1, (SV *)newpad); 540 av_store (newpadlist, 1, (SV *)newpad);
343 541
344 return newpadlist; 542 return newpadlist;
345} 543}
346 544
347static void 545ECB_INLINE void
348free_padlist (pTHX_ AV *padlist) 546free_padlist (pTHX_ AV *padlist)
349{ 547{
350 /* may be during global destruction */ 548 /* may be during global destruction */
351 if (SvREFCNT (padlist)) 549 if (!IN_DESTRUCT)
352 { 550 {
353 I32 i = AvFILLp (padlist); 551 I32 i = AvFILLp (padlist);
354 while (i >= 0) 552
553 while (i > 0) /* special-case index 0 */
355 { 554 {
356 SV **svp = av_fetch (padlist, i--, FALSE); 555 /* we try to be extra-careful here */
357 if (svp) 556 AV *av = (AV *)AvARRAY (padlist)[i--];
358 { 557 I32 j = AvFILLp (av);
359 SV *sv; 558
360 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 559 while (j >= 0)
560 SvREFCNT_dec (AvARRAY (av)[j--]);
561
562 AvFILLp (av) = -1;
361 SvREFCNT_dec (sv); 563 SvREFCNT_dec (av);
362
363 SvREFCNT_dec (*svp);
364 }
365 } 564 }
366 565
566 SvREFCNT_dec (AvARRAY (padlist)[0]);
567
568 AvFILLp (padlist) = -1;
367 SvREFCNT_dec ((SV*)padlist); 569 SvREFCNT_dec ((SV*)padlist);
368 } 570 }
369} 571}
370 572
371static int 573static int
372coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 574coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
373{ 575{
374 AV *padlist; 576 AV *padlist;
375 AV *av = (AV *)mg->mg_obj; 577 AV *av = (AV *)mg->mg_obj;
578
579 /* perl manages to free our internal AV and _then_ call us */
580 if (IN_DESTRUCT)
581 return 0;
376 582
377 /* casting is fun. */ 583 /* casting is fun. */
378 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 584 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
379 free_padlist (aTHX_ padlist); 585 free_padlist (aTHX_ padlist);
380 586
381 SvREFCNT_dec (av); /* sv_magicext increased the refcount */ 587 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
382 588
383 return 0; 589 return 0;
384} 590}
385
386#define CORO_MAGIC_type_cv PERL_MAGIC_ext
387#define CORO_MAGIC_type_state PERL_MAGIC_ext
388 591
389static MGVTBL coro_cv_vtbl = { 592static MGVTBL coro_cv_vtbl = {
390 0, 0, 0, 0, 593 0, 0, 0, 0,
391 coro_cv_free 594 coro_cv_free
392}; 595};
393 596
394#define CORO_MAGIC(sv, type) \
395 SvMAGIC (sv) \
396 ? SvMAGIC (sv)->mg_type == type \
397 ? SvMAGIC (sv) \
398 : mg_find (sv, type) \
399 : 0
400
401#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
402#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
403
404INLINE struct coro *
405SvSTATE_ (pTHX_ SV *coro)
406{
407 HV *stash;
408 MAGIC *mg;
409
410 if (SvROK (coro))
411 coro = SvRV (coro);
412
413 if (expect_false (SvTYPE (coro) != SVt_PVHV))
414 croak ("Coro::State object required");
415
416 stash = SvSTASH (coro);
417 if (expect_false (stash != coro_stash && stash != coro_state_stash))
418 {
419 /* very slow, but rare, check */
420 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
421 croak ("Coro::State object required");
422 }
423
424 mg = CORO_MAGIC_state (coro);
425 return (struct coro *)mg->mg_ptr;
426}
427
428#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
429
430/* the next two functions merely cache the padlists */ 597/* the next two functions merely cache the padlists */
431static void 598ECB_INLINE void
432get_padlist (pTHX_ CV *cv) 599get_padlist (pTHX_ CV *cv)
433{ 600{
434 MAGIC *mg = CORO_MAGIC_cv (cv); 601 MAGIC *mg = CORO_MAGIC_cv (cv);
435 AV *av; 602 AV *av;
436 603
437 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)) 604 if (ecb_expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
438 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 605 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
439 else 606 else
440 { 607 {
441#if CORO_PREFER_PERL_FUNCTIONS 608#if CORO_PREFER_PERL_FUNCTIONS
442 /* this is probably cleaner? but also slower! */ 609 /* this is probably cleaner? but also slower! */
443 /* in practise, it seems to be less stable */ 610 /* in practise, it seems to be less stable */
444 CV *cp = Perl_cv_clone (cv); 611 CV *cp = Perl_cv_clone (aTHX_ cv);
445 CvPADLIST (cv) = CvPADLIST (cp); 612 CvPADLIST (cv) = CvPADLIST (cp);
446 CvPADLIST (cp) = 0; 613 CvPADLIST (cp) = 0;
447 SvREFCNT_dec (cp); 614 SvREFCNT_dec (cp);
448#else 615#else
449 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 616 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
450#endif 617#endif
451 } 618 }
452} 619}
453 620
454static void 621ECB_INLINE void
455put_padlist (pTHX_ CV *cv) 622put_padlist (pTHX_ CV *cv)
456{ 623{
457 MAGIC *mg = CORO_MAGIC_cv (cv); 624 MAGIC *mg = CORO_MAGIC_cv (cv);
458 AV *av; 625 AV *av;
459 626
460 if (expect_false (!mg)) 627 if (ecb_expect_false (!mg))
461 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0); 628 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
462 629
463 av = (AV *)mg->mg_obj; 630 av = (AV *)mg->mg_obj;
464 631
465 if (expect_false (AvFILLp (av) >= AvMAX (av))) 632 if (ecb_expect_false (AvFILLp (av) >= AvMAX (av)))
466 av_extend (av, AvMAX (av) + 1); 633 av_extend (av, AvFILLp (av) + 1);
467 634
468 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 635 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
469} 636}
470 637
471/** load & save, init *******************************************************/ 638/** load & save, init *******************************************************/
639
640/* swap sv heads, at least logically */
641static void
642swap_svs (pTHX_ Coro__State c)
643{
644 int i;
645
646 for (i = 0; i <= AvFILLp (c->swap_sv); )
647 {
648 SV *a = AvARRAY (c->swap_sv)[i++];
649 SV *b = AvARRAY (c->swap_sv)[i++];
650
651 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
652 SV tmp;
653
654 /* swap sv_any */
655 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
656
657 /* swap sv_flags */
658 SvFLAGS (&tmp) = SvFLAGS (a);
659 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
660 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
661
662#if PERL_VERSION_ATLEAST (5,10,0)
663 /* perl 5.10 complicates this _quite_ a bit, but it also is
664 * much faster, so no quarrels here. alternatively, we could
665 * sv_upgrade to avoid this.
666 */
667 {
668 /* swap sv_u */
669 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
670
671 /* if SvANY points to the head, we need to adjust the pointers,
672 * as the pointer for a still points to b, and maybe vice versa.
673 */
674 #define svany_in_head(type) \
675 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
676
677 if (svany_in_head (SvTYPE (a)))
678 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
679
680 if (svany_in_head (SvTYPE (b)))
681 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
682 }
683#endif
684 }
685}
686
687#define SWAP_SVS(coro) \
688 if (ecb_expect_false ((coro)->swap_sv)) \
689 swap_svs (aTHX_ (coro))
690
691static void
692on_enterleave_call (pTHX_ SV *cb);
472 693
473static void 694static void
474load_perl (pTHX_ Coro__State c) 695load_perl (pTHX_ Coro__State c)
475{ 696{
476 perl_slots *slot = c->slot; 697 perl_slots *slot = c->slot;
477 c->slot = 0; 698 c->slot = 0;
478 699
479 PL_mainstack = c->mainstack; 700 PL_mainstack = c->mainstack;
480 701
481 GvSV (PL_defgv) = slot->defsv; 702#if CORO_JIT
482 GvAV (PL_defgv) = slot->defav; 703 load_perl_slots (slot);
483 GvSV (PL_errgv) = slot->errsv; 704#else
484 GvSV (irsgv) = slot->irsgv;
485
486 #define VAR(name,type) PL_ ## name = slot->name; 705 #define VARx(name,expr,type) expr = slot->name;
487 # include "state.h" 706 # include "state.h"
488 #undef VAR 707 #undef VARx
708#endif
489 709
490 { 710 {
491 dSP; 711 dSP;
492 712
493 CV *cv; 713 CV *cv;
494 714
495 /* now do the ugly restore mess */ 715 /* now do the ugly restore mess */
496 while (expect_true (cv = (CV *)POPs)) 716 while (ecb_expect_true (cv = (CV *)POPs))
497 { 717 {
498 put_padlist (aTHX_ cv); /* mark this padlist as available */ 718 put_padlist (aTHX_ cv); /* mark this padlist as available */
499 CvDEPTH (cv) = PTR2IV (POPs); 719 CvDEPTH (cv) = PTR2IV (POPs);
500 CvPADLIST (cv) = (AV *)POPs; 720 CvPADLIST (cv) = (AV *)POPs;
501 } 721 }
502 722
503 PUTBACK; 723 PUTBACK;
504 } 724 }
505 725
506 slf_frame = c->slf_frame; 726 slf_frame = c->slf_frame;
727 CORO_THROW = c->except;
728
729 if (ecb_expect_false (enable_times))
730 {
731 if (ecb_expect_false (!times_valid))
732 coro_times_update ();
733
734 coro_times_sub (c);
735 }
736
737 if (ecb_expect_false (c->on_enter))
738 {
739 int i;
740
741 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
742 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
743 }
744
745 SWAP_SVS (c);
507} 746}
508 747
509static void 748static void
510save_perl (pTHX_ Coro__State c) 749save_perl (pTHX_ Coro__State c)
511{ 750{
751 SWAP_SVS (c);
752
753 if (ecb_expect_false (c->on_leave))
754 {
755 int i;
756
757 for (i = AvFILLp (c->on_leave); i >= 0; --i)
758 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
759 }
760
761 times_valid = 0;
762
763 if (ecb_expect_false (enable_times))
764 {
765 coro_times_update (); times_valid = 1;
766 coro_times_add (c);
767 }
768
769 c->except = CORO_THROW;
512 c->slf_frame = slf_frame; 770 c->slf_frame = slf_frame;
513 771
514 { 772 {
515 dSP; 773 dSP;
516 I32 cxix = cxstack_ix; 774 I32 cxix = cxstack_ix;
… …
524 782
525 XPUSHs (Nullsv); 783 XPUSHs (Nullsv);
526 /* this loop was inspired by pp_caller */ 784 /* this loop was inspired by pp_caller */
527 for (;;) 785 for (;;)
528 { 786 {
529 while (expect_true (cxix >= 0)) 787 while (ecb_expect_true (cxix >= 0))
530 { 788 {
531 PERL_CONTEXT *cx = &ccstk[cxix--]; 789 PERL_CONTEXT *cx = &ccstk[cxix--];
532 790
533 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)) 791 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
534 { 792 {
535 CV *cv = cx->blk_sub.cv; 793 CV *cv = cx->blk_sub.cv;
536 794
537 if (expect_true (CvDEPTH (cv))) 795 if (ecb_expect_true (CvDEPTH (cv)))
538 { 796 {
539 EXTEND (SP, 3); 797 EXTEND (SP, 3);
540 PUSHs ((SV *)CvPADLIST (cv)); 798 PUSHs ((SV *)CvPADLIST (cv));
541 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv))); 799 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
542 PUSHs ((SV *)cv); 800 PUSHs ((SV *)cv);
… …
545 get_padlist (aTHX_ cv); 803 get_padlist (aTHX_ cv);
546 } 804 }
547 } 805 }
548 } 806 }
549 807
550 if (expect_true (top_si->si_type == PERLSI_MAIN)) 808 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
551 break; 809 break;
552 810
553 top_si = top_si->si_prev; 811 top_si = top_si->si_prev;
554 ccstk = top_si->si_cxstack; 812 ccstk = top_si->si_cxstack;
555 cxix = top_si->si_cxix; 813 cxix = top_si->si_cxix;
… …
557 815
558 PUTBACK; 816 PUTBACK;
559 } 817 }
560 818
561 /* allocate some space on the context stack for our purposes */ 819 /* allocate some space on the context stack for our purposes */
562 /* we manually unroll here, as usually 2 slots is enough */ 820 if (ecb_expect_false (cxstack_ix + SLOT_COUNT >= cxstack_max))
563 if (SLOT_COUNT >= 1) CXINC;
564 if (SLOT_COUNT >= 2) CXINC;
565 if (SLOT_COUNT >= 3) CXINC;
566 { 821 {
567 int i; 822 unsigned int i;
823
568 for (i = 3; i < SLOT_COUNT; ++i) 824 for (i = 0; i < SLOT_COUNT; ++i)
569 CXINC; 825 CXINC;
570 } 826
571 cxstack_ix -= SLOT_COUNT; /* undo allocation */ 827 cxstack_ix -= SLOT_COUNT; /* undo allocation */
828 }
572 829
573 c->mainstack = PL_mainstack; 830 c->mainstack = PL_mainstack;
574 831
575 { 832 {
576 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); 833 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
577 834
578 slot->defav = GvAV (PL_defgv); 835#if CORO_JIT
579 slot->defsv = DEFSV; 836 save_perl_slots (slot);
580 slot->errsv = ERRSV; 837#else
581 slot->irsgv = GvSV (irsgv);
582
583 #define VAR(name,type) slot->name = PL_ ## name; 838 #define VARx(name,expr,type) slot->name = expr;
584 # include "state.h" 839 # include "state.h"
585 #undef VAR 840 #undef VARx
841#endif
586 } 842 }
587} 843}
588 844
589/* 845/*
590 * allocate various perl stacks. This is almost an exact copy 846 * allocate various perl stacks. This is almost an exact copy
591 * of perl.c:init_stacks, except that it uses less memory 847 * of perl.c:init_stacks, except that it uses less memory
592 * on the (sometimes correct) assumption that coroutines do 848 * on the (sometimes correct) assumption that coroutines do
593 * not usually need a lot of stackspace. 849 * not usually need a lot of stackspace.
594 */ 850 */
595#if CORO_PREFER_PERL_FUNCTIONS 851#if CORO_PREFER_PERL_FUNCTIONS
596# define coro_init_stacks init_stacks 852# define coro_init_stacks(thx) init_stacks ()
597#else 853#else
598static void 854static void
599coro_init_stacks (pTHX) 855coro_init_stacks (pTHX)
600{ 856{
601 PL_curstackinfo = new_stackinfo(32, 8); 857 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
602 PL_curstackinfo->si_type = PERLSI_MAIN; 858 PL_curstackinfo->si_type = PERLSI_MAIN;
603 PL_curstack = PL_curstackinfo->si_stack; 859 PL_curstack = PL_curstackinfo->si_stack;
604 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 860 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
605 861
606 PL_stack_base = AvARRAY(PL_curstack); 862 PL_stack_base = AvARRAY(PL_curstack);
… …
664#if !PERL_VERSION_ATLEAST (5,10,0) 920#if !PERL_VERSION_ATLEAST (5,10,0)
665 Safefree (PL_retstack); 921 Safefree (PL_retstack);
666#endif 922#endif
667} 923}
668 924
925#define CORO_RSS \
926 rss += sizeof (SYM (curstackinfo)); \
927 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
928 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
929 rss += SYM (tmps_max) * sizeof (SV *); \
930 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
931 rss += SYM (scopestack_max) * sizeof (I32); \
932 rss += SYM (savestack_max) * sizeof (ANY);
933
669static size_t 934static size_t
670coro_rss (pTHX_ struct coro *coro) 935coro_rss (pTHX_ struct coro *coro)
671{ 936{
672 size_t rss = sizeof (*coro); 937 size_t rss = sizeof (*coro);
673 938
674 if (coro->mainstack) 939 if (coro->mainstack)
675 { 940 {
676 perl_slots tmp_slot;
677 perl_slots *slot;
678
679 if (coro->flags & CF_RUNNING) 941 if (coro->flags & CF_RUNNING)
680 { 942 {
681 slot = &tmp_slot; 943 #define SYM(sym) PL_ ## sym
682 944 CORO_RSS;
683 #define VAR(name,type) slot->name = PL_ ## name;
684 # include "state.h"
685 #undef VAR 945 #undef SYM
686 } 946 }
687 else 947 else
688 slot = coro->slot;
689
690 if (slot)
691 { 948 {
692 rss += sizeof (slot->curstackinfo); 949 #define SYM(sym) coro->slot->sym
693 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 950 CORO_RSS;
694 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 951 #undef SYM
695 rss += slot->tmps_max * sizeof (SV *);
696 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
697 rss += slot->scopestack_max * sizeof (I32);
698 rss += slot->savestack_max * sizeof (ANY);
699
700#if !PERL_VERSION_ATLEAST (5,10,0)
701 rss += slot->retstack_max * sizeof (OP *);
702#endif
703 } 952 }
704 } 953 }
705 954
706 return rss; 955 return rss;
707} 956}
… …
720#endif 969#endif
721 970
722/* 971/*
723 * This overrides the default magic get method of %SIG elements. 972 * This overrides the default magic get method of %SIG elements.
724 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook 973 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
725 * and instead of tryign to save and restore the hash elements, we just provide 974 * and instead of trying to save and restore the hash elements (extremely slow),
726 * readback here. 975 * we just provide our own readback here.
727 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
728 * not expecting this to actually change the hook. This is a potential problem
729 * when a schedule happens then, but we ignore this.
730 */ 976 */
731static int 977static int ecb_cold
732coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg) 978coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
733{ 979{
734 const char *s = MgPV_nolen_const (mg); 980 const char *s = MgPV_nolen_const (mg);
735 981
736 if (*s == '_') 982 if (*s == '_')
… …
748 } 994 }
749 995
750 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0; 996 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
751} 997}
752 998
753static int 999static int ecb_cold
754coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg) 1000coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
755{ 1001{
756 const char *s = MgPV_nolen_const (mg); 1002 const char *s = MgPV_nolen_const (mg);
757 1003
758 if (*s == '_') 1004 if (*s == '_')
… …
772 } 1018 }
773 1019
774 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0; 1020 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
775} 1021}
776 1022
777static int 1023static int ecb_cold
778coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg) 1024coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
779{ 1025{
780 const char *s = MgPV_nolen_const (mg); 1026 const char *s = MgPV_nolen_const (mg);
781 1027
782 if (*s == '_') 1028 if (*s == '_')
… …
787 if (strEQ (s, "__WARN__")) svp = &PL_warnhook; 1033 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
788 1034
789 if (svp) 1035 if (svp)
790 { 1036 {
791 SV *old = *svp; 1037 SV *old = *svp;
792 *svp = newSVsv (sv); 1038 *svp = SvOK (sv) ? newSVsv (sv) : 0;
793 SvREFCNT_dec (old); 1039 SvREFCNT_dec (old);
794 return 0; 1040 return 0;
795 } 1041 }
796 } 1042 }
797 1043
… …
809slf_check_nop (pTHX_ struct CoroSLF *frame) 1055slf_check_nop (pTHX_ struct CoroSLF *frame)
810{ 1056{
811 return 0; 1057 return 0;
812} 1058}
813 1059
814static void 1060static int
1061slf_check_repeat (pTHX_ struct CoroSLF *frame)
1062{
1063 return 1;
1064}
1065
1066static UNOP init_perl_op;
1067
1068ecb_noinline static void /* noinline to keep it out of the transfer fast path */
815coro_setup (pTHX_ struct coro *coro) 1069init_perl (pTHX_ struct coro *coro)
816{ 1070{
817 /* 1071 /*
818 * emulate part of the perl startup here. 1072 * emulate part of the perl startup here.
819 */ 1073 */
820 coro_init_stacks (aTHX); 1074 coro_init_stacks (aTHX);
821 1075
822 PL_runops = RUNOPS_DEFAULT; 1076 PL_runops = RUNOPS_DEFAULT;
823 PL_curcop = &PL_compiling; 1077 PL_curcop = &PL_compiling;
824 PL_in_eval = EVAL_NULL; 1078 PL_in_eval = EVAL_NULL;
825 PL_comppad = 0; 1079 PL_comppad = 0;
1080 PL_comppad_name = 0;
1081 PL_comppad_name_fill = 0;
1082 PL_comppad_name_floor = 0;
826 PL_curpm = 0; 1083 PL_curpm = 0;
827 PL_curpad = 0; 1084 PL_curpad = 0;
828 PL_localizing = 0; 1085 PL_localizing = 0;
829 PL_dirty = 0;
830 PL_restartop = 0; 1086 PL_restartop = 0;
831#if PERL_VERSION_ATLEAST (5,10,0) 1087#if PERL_VERSION_ATLEAST (5,10,0)
832 PL_parser = 0; 1088 PL_parser = 0;
833#endif 1089#endif
1090 PL_hints = 0;
834 1091
835 /* recreate the die/warn hooks */ 1092 /* recreate the die/warn hooks */
836 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook ); 1093 PL_diehook = SvREFCNT_inc (rv_diehook);
837 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook); 1094 PL_warnhook = SvREFCNT_inc (rv_warnhook);
838 1095
839 GvSV (PL_defgv) = newSV (0); 1096 GvSV (PL_defgv) = newSV (0);
840 GvAV (PL_defgv) = coro->args; coro->args = 0; 1097 GvAV (PL_defgv) = coro->args; coro->args = 0;
841 GvSV (PL_errgv) = newSV (0); 1098 GvSV (PL_errgv) = newSV (0);
842 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 1099 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1100 GvHV (PL_hintgv) = 0;
843 PL_rs = newSVsv (GvSV (irsgv)); 1101 PL_rs = newSVsv (GvSV (irsgv));
844 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv); 1102 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
845 1103
846 { 1104 {
847 dSP; 1105 dSP;
848 UNOP myop; 1106 UNOP myop;
849 1107
850 Zero (&myop, 1, UNOP); 1108 Zero (&myop, 1, UNOP);
851 myop.op_next = Nullop; 1109 myop.op_next = Nullop;
1110 myop.op_type = OP_ENTERSUB;
852 myop.op_flags = OPf_WANT_VOID; 1111 myop.op_flags = OPf_WANT_VOID;
853 1112
854 PUSHMARK (SP); 1113 PUSHMARK (SP);
855 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 1114 PUSHs ((SV *)coro->startcv);
856 PUTBACK; 1115 PUTBACK;
857 PL_op = (OP *)&myop; 1116 PL_op = (OP *)&myop;
858 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1117 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
859 SPAGAIN;
860 } 1118 }
861 1119
862 /* this newly created coroutine might be run on an existing cctx which most 1120 /* this newly created coroutine might be run on an existing cctx which most
863 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here. 1121 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
864 */ 1122 */
865 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */ 1123 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
866 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */ 1124 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
867} 1125 slf_frame.destroy = 0;
868 1126
1127 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1128 init_perl_op.op_next = PL_op;
1129 init_perl_op.op_type = OP_ENTERSUB;
1130 init_perl_op.op_ppaddr = pp_slf;
1131 /* no flags etc. required, as an init function won't be called */
1132
1133 PL_op = (OP *)&init_perl_op;
1134
1135 /* copy throw, in case it was set before init_perl */
1136 CORO_THROW = coro->except;
1137
1138 SWAP_SVS (coro);
1139
1140 if (ecb_expect_false (enable_times))
1141 {
1142 coro_times_update ();
1143 coro_times_sub (coro);
1144 }
1145}
1146
869static void 1147static void
870coro_destruct (pTHX_ struct coro *coro) 1148coro_unwind_stacks (pTHX)
871{ 1149{
872 if (!IN_DESTRUCT) 1150 if (!IN_DESTRUCT)
873 { 1151 {
874 /* restore all saved variables and stuff */ 1152 /* restore all saved variables and stuff */
875 LEAVE_SCOPE (0); 1153 LEAVE_SCOPE (0);
… …
883 POPSTACK_TO (PL_mainstack); 1161 POPSTACK_TO (PL_mainstack);
884 1162
885 /* unwind main stack */ 1163 /* unwind main stack */
886 dounwind (-1); 1164 dounwind (-1);
887 } 1165 }
1166}
888 1167
889 SvREFCNT_dec (GvSV (PL_defgv)); 1168static void
890 SvREFCNT_dec (GvAV (PL_defgv)); 1169destroy_perl (pTHX_ struct coro *coro)
891 SvREFCNT_dec (GvSV (PL_errgv)); 1170{
892 SvREFCNT_dec (PL_defoutgv); 1171 SV *svf [9];
893 SvREFCNT_dec (PL_rs);
894 SvREFCNT_dec (GvSV (irsgv));
895 1172
896 SvREFCNT_dec (PL_diehook);
897 SvREFCNT_dec (PL_warnhook);
898 1173 {
1174 SV *old_current = SvRV (coro_current);
1175 struct coro *current = SvSTATE (old_current);
1176
1177 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1178
1179 save_perl (aTHX_ current);
1180
1181 /* this will cause transfer_check to croak on block*/
1182 SvRV_set (coro_current, (SV *)coro->hv);
1183
1184 load_perl (aTHX_ coro);
1185
1186 coro_unwind_stacks (aTHX);
1187
1188 /* restore swapped sv's */
1189 SWAP_SVS (coro);
1190
1191 coro_destruct_stacks (aTHX);
1192
1193 // now save some sv's to be free'd later
1194 svf [0] = GvSV (PL_defgv);
1195 svf [1] = (SV *)GvAV (PL_defgv);
1196 svf [2] = GvSV (PL_errgv);
1197 svf [3] = (SV *)PL_defoutgv;
1198 svf [4] = PL_rs;
1199 svf [5] = GvSV (irsgv);
1200 svf [6] = (SV *)GvHV (PL_hintgv);
1201 svf [7] = PL_diehook;
1202 svf [8] = PL_warnhook;
1203 assert (9 == sizeof (svf) / sizeof (*svf));
1204
1205 SvRV_set (coro_current, old_current);
1206
1207 load_perl (aTHX_ current);
1208 }
1209
1210 {
1211 unsigned int i;
1212
1213 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1214 SvREFCNT_dec (svf [i]);
1215
899 SvREFCNT_dec (coro->saved_deffh); 1216 SvREFCNT_dec (coro->saved_deffh);
900 SvREFCNT_dec (coro->throw); 1217 SvREFCNT_dec (coro->rouse_cb);
901 1218 SvREFCNT_dec (coro->invoke_cb);
902 coro_destruct_stacks (aTHX); 1219 SvREFCNT_dec (coro->invoke_av);
1220 }
903} 1221}
904 1222
905INLINE void 1223ECB_INLINE void
906free_coro_mortal (pTHX) 1224free_coro_mortal (pTHX)
907{ 1225{
908 if (expect_true (coro_mortal)) 1226 if (ecb_expect_true (coro_mortal))
909 { 1227 {
910 SvREFCNT_dec (coro_mortal); 1228 SvREFCNT_dec ((SV *)coro_mortal);
911 coro_mortal = 0; 1229 coro_mortal = 0;
912 } 1230 }
913} 1231}
914 1232
915static int 1233static int
916runops_trace (pTHX) 1234runops_trace (pTHX)
917{ 1235{
918 COP *oldcop = 0; 1236 COP *oldcop = 0;
919 int oldcxix = -2; 1237 int oldcxix = -2;
920 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
921 coro_cctx *cctx = coro->cctx;
922 1238
923 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1239 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
924 { 1240 {
925 PERL_ASYNC_CHECK (); 1241 PERL_ASYNC_CHECK ();
926 1242
927 if (cctx->flags & CC_TRACE_ALL) 1243 if (cctx_current->flags & CC_TRACE_ALL)
928 { 1244 {
929 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1245 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
930 { 1246 {
931 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1247 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
932 SV **bot, **top; 1248 SV **bot, **top;
933 AV *av = newAV (); /* return values */ 1249 AV *av = newAV (); /* return values */
934 SV **cb; 1250 SV **cb;
… …
971 1287
972 if (PL_curcop != &PL_compiling) 1288 if (PL_curcop != &PL_compiling)
973 { 1289 {
974 SV **cb; 1290 SV **cb;
975 1291
976 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1292 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
977 { 1293 {
978 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1294 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
979 1295
980 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1296 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
981 { 1297 {
982 runops_proc_t old_runops = PL_runops;
983 dSP; 1298 dSP;
984 GV *gv = CvGV (cx->blk_sub.cv); 1299 GV *gv = CvGV (cx->blk_sub.cv);
985 SV *fullname = sv_2mortal (newSV (0)); 1300 SV *fullname = sv_2mortal (newSV (0));
986 1301
987 if (isGV (gv)) 1302 if (isGV (gv))
… …
992 SAVETMPS; 1307 SAVETMPS;
993 EXTEND (SP, 3); 1308 EXTEND (SP, 3);
994 PUSHMARK (SP); 1309 PUSHMARK (SP);
995 PUSHs (&PL_sv_yes); 1310 PUSHs (&PL_sv_yes);
996 PUSHs (fullname); 1311 PUSHs (fullname);
997 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1312 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
998 PUTBACK; 1313 PUTBACK;
999 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1314 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1000 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1315 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1001 SPAGAIN; 1316 SPAGAIN;
1002 FREETMPS; 1317 FREETMPS;
… …
1005 } 1320 }
1006 1321
1007 oldcxix = cxstack_ix; 1322 oldcxix = cxstack_ix;
1008 } 1323 }
1009 1324
1010 if (cctx->flags & CC_TRACE_LINE) 1325 if (cctx_current->flags & CC_TRACE_LINE)
1011 { 1326 {
1012 dSP; 1327 dSP;
1013 1328
1014 PL_runops = RUNOPS_DEFAULT; 1329 PL_runops = RUNOPS_DEFAULT;
1015 ENTER; 1330 ENTER;
… …
1034 1349
1035 TAINT_NOT; 1350 TAINT_NOT;
1036 return 0; 1351 return 0;
1037} 1352}
1038 1353
1354static struct CoroSLF cctx_ssl_frame;
1355
1039static void 1356static void
1040prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx) 1357slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1041{ 1358{
1042 ta->prev = (struct coro *)cctx;
1043 ta->next = 0; 1359 ta->prev = 0;
1044} 1360}
1045 1361
1046/* inject a fake call to Coro::State::_cctx_init into the execution */ 1362static int
1047/* _cctx_init should be careful, as it could be called at almost any time */ 1363slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1048/* during execution of a perl program */
1049/* also initialises PL_top_env */
1050static void NOINLINE
1051cctx_prepare (pTHX_ coro_cctx *cctx)
1052{ 1364{
1053 dSP; 1365 *frame = cctx_ssl_frame;
1054 UNOP myop;
1055 1366
1367 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1368}
1369
1370/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1371static void ecb_noinline
1372cctx_prepare (pTHX)
1373{
1056 PL_top_env = &PL_start_env; 1374 PL_top_env = &PL_start_env;
1057 1375
1058 if (cctx->flags & CC_TRACE) 1376 if (cctx_current->flags & CC_TRACE)
1059 PL_runops = runops_trace; 1377 PL_runops = runops_trace;
1060 1378
1061 Zero (&myop, 1, UNOP); 1379 /* we already must be executing an SLF op, there is no other valid way
1062 myop.op_next = PL_op; 1380 * that can lead to creation of a new cctx */
1063 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1381 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1382 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1064 1383
1065 PUSHMARK (SP); 1384 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1066 EXTEND (SP, 2); 1385 cctx_ssl_frame = slf_frame;
1067 PUSHs (sv_2mortal (newSViv ((IV)cctx))); 1386
1068 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1387 slf_frame.prepare = slf_prepare_set_stacklevel;
1069 PUTBACK; 1388 slf_frame.check = slf_check_set_stacklevel;
1070 PL_op = (OP *)&myop;
1071 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1072 SPAGAIN;
1073} 1389}
1074 1390
1075/* the tail of transfer: execute stuff we can only do after a transfer */ 1391/* the tail of transfer: execute stuff we can only do after a transfer */
1076INLINE void 1392ECB_INLINE void
1077transfer_tail (pTHX) 1393transfer_tail (pTHX)
1078{ 1394{
1079 struct coro *next = (struct coro *)transfer_next;
1080 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1081 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1082
1083 free_coro_mortal (aTHX); 1395 free_coro_mortal (aTHX);
1084
1085 if (expect_false (next->throw))
1086 {
1087 SV *exception = sv_2mortal (next->throw);
1088
1089 next->throw = 0;
1090 sv_setsv (ERRSV, exception);
1091 croak (0);
1092 }
1093} 1396}
1094 1397
1095/* 1398/*
1096 * this is a _very_ stripped down perl interpreter ;) 1399 * this is a _very_ stripped down perl interpreter ;)
1097 */ 1400 */
… …
1109 /* normally we would need to skip the entersub here */ 1412 /* normally we would need to skip the entersub here */
1110 /* not doing so will re-execute it, which is exactly what we want */ 1413 /* not doing so will re-execute it, which is exactly what we want */
1111 /* PL_nop = PL_nop->op_next */ 1414 /* PL_nop = PL_nop->op_next */
1112 1415
1113 /* inject a fake subroutine call to cctx_init */ 1416 /* inject a fake subroutine call to cctx_init */
1114 cctx_prepare (aTHX_ (coro_cctx *)arg); 1417 cctx_prepare (aTHX);
1115 1418
1116 /* cctx_run is the alternative tail of transfer() */ 1419 /* cctx_run is the alternative tail of transfer() */
1117 /* TODO: throwing an exception here might be deadly, VERIFY */
1118 transfer_tail (aTHX); 1420 transfer_tail (aTHX);
1119 1421
1120 /* somebody or something will hit me for both perl_run and PL_restartop */ 1422 /* somebody or something will hit me for both perl_run and PL_restartop */
1121 PL_restartop = PL_op; 1423 PL_restartop = PL_op;
1122 perl_run (PL_curinterp); 1424 perl_run (PL_curinterp);
1425 /*
1426 * Unfortunately, there is no way to get at the return values of the
1427 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1428 * runtime errors here, as this is just a random interpreter, not a thread.
1429 */
1123 1430
1124 /* 1431 /*
1125 * If perl-run returns we assume exit() was being called or the coro 1432 * If perl-run returns we assume exit() was being called or the coro
1126 * fell off the end, which seems to be the only valid (non-bug) 1433 * fell off the end, which seems to be the only valid (non-bug)
1127 * reason for perl_run to return. We try to exit by jumping to the 1434 * reason for perl_run to return. We try to exit by jumping to the
1128 * bootstrap-time "top" top_env, as we cannot restore the "main" 1435 * bootstrap-time "top" top_env, as we cannot restore the "main"
1129 * coroutine as Coro has no such concept 1436 * coroutine as Coro has no such concept.
1437 * This actually isn't valid with the pthread backend, but OSes requiring
1438 * that backend are too broken to do it in a standards-compliant way.
1130 */ 1439 */
1131 PL_top_env = main_top_env; 1440 PL_top_env = main_top_env;
1132 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1441 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1133 } 1442 }
1134} 1443}
… …
1211cctx_destroy (coro_cctx *cctx) 1520cctx_destroy (coro_cctx *cctx)
1212{ 1521{
1213 if (!cctx) 1522 if (!cctx)
1214 return; 1523 return;
1215 1524
1525 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1526
1216 --cctx_count; 1527 --cctx_count;
1217 coro_destroy (&cctx->cctx); 1528 coro_destroy (&cctx->cctx);
1218 1529
1219 /* coro_transfer creates new, empty cctx's */ 1530 /* coro_transfer creates new, empty cctx's */
1220 if (cctx->sptr) 1531 if (cctx->sptr)
… …
1238#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE)) 1549#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1239 1550
1240static coro_cctx * 1551static coro_cctx *
1241cctx_get (pTHX) 1552cctx_get (pTHX)
1242{ 1553{
1243 while (expect_true (cctx_first)) 1554 while (ecb_expect_true (cctx_first))
1244 { 1555 {
1245 coro_cctx *cctx = cctx_first; 1556 coro_cctx *cctx = cctx_first;
1246 cctx_first = cctx->next; 1557 cctx_first = cctx->next;
1247 --cctx_idle; 1558 --cctx_idle;
1248 1559
1249 if (expect_true (!CCTX_EXPIRED (cctx))) 1560 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
1250 return cctx; 1561 return cctx;
1251 1562
1252 cctx_destroy (cctx); 1563 cctx_destroy (cctx);
1253 } 1564 }
1254 1565
… …
1259cctx_put (coro_cctx *cctx) 1570cctx_put (coro_cctx *cctx)
1260{ 1571{
1261 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr)); 1572 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1262 1573
1263 /* free another cctx if overlimit */ 1574 /* free another cctx if overlimit */
1264 if (expect_false (cctx_idle >= cctx_max_idle)) 1575 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1265 { 1576 {
1266 coro_cctx *first = cctx_first; 1577 coro_cctx *first = cctx_first;
1267 cctx_first = first->next; 1578 cctx_first = first->next;
1268 --cctx_idle; 1579 --cctx_idle;
1269 1580
… …
1278/** coroutine switching *****************************************************/ 1589/** coroutine switching *****************************************************/
1279 1590
1280static void 1591static void
1281transfer_check (pTHX_ struct coro *prev, struct coro *next) 1592transfer_check (pTHX_ struct coro *prev, struct coro *next)
1282{ 1593{
1594 /* TODO: throwing up here is considered harmful */
1595
1283 if (expect_true (prev != next)) 1596 if (ecb_expect_true (prev != next))
1284 { 1597 {
1285 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1598 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1286 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,"); 1599 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1287 1600
1288 if (expect_false (next->flags & CF_RUNNING)) 1601 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1289 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1290
1291 if (expect_false (next->flags & CF_DESTROYED))
1292 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,"); 1602 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1293 1603
1294#if !PERL_VERSION_ATLEAST (5,10,0) 1604#if !PERL_VERSION_ATLEAST (5,10,0)
1295 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1605 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1296 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,"); 1606 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1297#endif 1607#endif
1298 } 1608 }
1299} 1609}
1300 1610
1301/* always use the TRANSFER macro */ 1611/* always use the TRANSFER macro */
1302static void NOINLINE 1612static void ecb_noinline /* noinline so we have a fixed stackframe */
1303transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1613transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1304{ 1614{
1305 dSTACKLEVEL; 1615 dSTACKLEVEL;
1306 1616
1307 /* sometimes transfer is only called to set idle_sp */ 1617 /* sometimes transfer is only called to set idle_sp */
1308 if (expect_false (!next)) 1618 if (ecb_expect_false (!prev))
1309 { 1619 {
1310 ((coro_cctx *)prev)->idle_sp = (void *)stacklevel; 1620 cctx_current->idle_sp = STACKLEVEL;
1311 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1621 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1312 } 1622 }
1313 else if (expect_true (prev != next)) 1623 else if (ecb_expect_true (prev != next))
1314 { 1624 {
1315 coro_cctx *prev__cctx; 1625 coro_cctx *cctx_prev;
1316 1626
1317 if (expect_false (prev->flags & CF_NEW)) 1627 if (ecb_expect_false (prev->flags & CF_NEW))
1318 { 1628 {
1319 /* create a new empty/source context */ 1629 /* create a new empty/source context */
1320 prev->cctx = cctx_new_empty ();
1321 prev->flags &= ~CF_NEW; 1630 prev->flags &= ~CF_NEW;
1322 prev->flags |= CF_RUNNING; 1631 prev->flags |= CF_RUNNING;
1323 } 1632 }
1324 1633
1325 prev->flags &= ~CF_RUNNING; 1634 prev->flags &= ~CF_RUNNING;
1326 next->flags |= CF_RUNNING; 1635 next->flags |= CF_RUNNING;
1327 1636
1328 /* first get rid of the old state */ 1637 /* first get rid of the old state */
1329 save_perl (aTHX_ prev); 1638 save_perl (aTHX_ prev);
1330 1639
1331 if (expect_false (next->flags & CF_NEW)) 1640 if (ecb_expect_false (next->flags & CF_NEW))
1332 { 1641 {
1333 /* need to start coroutine */ 1642 /* need to start coroutine */
1334 next->flags &= ~CF_NEW; 1643 next->flags &= ~CF_NEW;
1335 /* setup coroutine call */ 1644 /* setup coroutine call */
1336 coro_setup (aTHX_ next); 1645 init_perl (aTHX_ next);
1337 } 1646 }
1338 else 1647 else
1339 load_perl (aTHX_ next); 1648 load_perl (aTHX_ next);
1340 1649
1341 prev__cctx = prev->cctx;
1342
1343 /* possibly untie and reuse the cctx */ 1650 /* possibly untie and reuse the cctx */
1344 if (expect_true ( 1651 if (ecb_expect_true (
1345 prev__cctx->idle_sp == (void *)stacklevel 1652 cctx_current->idle_sp == STACKLEVEL
1346 && !(prev__cctx->flags & CC_TRACE) 1653 && !(cctx_current->flags & CC_TRACE)
1347 && !force_cctx 1654 && !force_cctx
1348 )) 1655 ))
1349 { 1656 {
1350 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */ 1657 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1351 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te)); 1658 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1352 1659
1353 prev->cctx = 0;
1354
1355 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1660 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1356 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1661 /* without this the next cctx_get might destroy the running cctx while still in use */
1357 if (expect_false (CCTX_EXPIRED (prev__cctx))) 1662 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1358 if (!next->cctx) 1663 if (ecb_expect_true (!next->cctx))
1359 next->cctx = cctx_get (aTHX); 1664 next->cctx = cctx_get (aTHX);
1360 1665
1361 cctx_put (prev__cctx); 1666 cctx_put (cctx_current);
1362 } 1667 }
1668 else
1669 prev->cctx = cctx_current;
1363 1670
1364 ++next->usecount; 1671 ++next->usecount;
1365 1672
1366 if (expect_true (!next->cctx)) 1673 cctx_prev = cctx_current;
1367 next->cctx = cctx_get (aTHX); 1674 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1368 1675
1369 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next)); 1676 next->cctx = 0;
1370 transfer_next = next;
1371 1677
1372 if (expect_false (prev__cctx != next->cctx)) 1678 if (ecb_expect_false (cctx_prev != cctx_current))
1373 { 1679 {
1374 prev__cctx->top_env = PL_top_env; 1680 cctx_prev->top_env = PL_top_env;
1375 PL_top_env = next->cctx->top_env; 1681 PL_top_env = cctx_current->top_env;
1376 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1682 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1377 } 1683 }
1378 1684
1379 transfer_tail (aTHX); 1685 transfer_tail (aTHX);
1380 } 1686 }
1381} 1687}
… …
1383#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx)) 1689#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1384#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1690#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1385 1691
1386/** high level stuff ********************************************************/ 1692/** high level stuff ********************************************************/
1387 1693
1694/* this function is actually Coro, not Coro::State, but we call it from here */
1695/* because it is convenient - but it hasn't been declared yet for that reason */
1388static int 1696static void
1697coro_call_on_destroy (pTHX_ struct coro *coro);
1698
1699static void
1389coro_state_destroy (pTHX_ struct coro *coro) 1700coro_state_destroy (pTHX_ struct coro *coro)
1390{ 1701{
1391 if (coro->flags & CF_DESTROYED) 1702 if (coro->flags & CF_ZOMBIE)
1392 return 0; 1703 return;
1393 1704
1394 if (coro->on_destroy)
1395 coro->on_destroy (aTHX_ coro); 1705 slf_destroy (aTHX_ coro);
1396 1706
1397 coro->flags |= CF_DESTROYED; 1707 coro->flags |= CF_ZOMBIE;
1398 1708
1399 if (coro->flags & CF_READY) 1709 if (coro->flags & CF_READY)
1400 { 1710 {
1401 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1711 /* reduce nready, as destroying a ready coro effectively unreadies it */
1402 /* alternative: look through all ready queues and remove the coro */ 1712 /* alternative: look through all ready queues and remove the coro */
1403 --coro_nready; 1713 --coro_nready;
1404 } 1714 }
1405 else 1715 else
1406 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1716 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1407 1717
1408 if (coro->mainstack && coro->mainstack != main_mainstack)
1409 {
1410 struct coro temp;
1411
1412 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1413
1414 save_perl (aTHX_ &temp);
1415 load_perl (aTHX_ coro);
1416
1417 coro_destruct (aTHX_ coro);
1418
1419 load_perl (aTHX_ &temp);
1420
1421 coro->slot = 0;
1422 }
1423
1424 cctx_destroy (coro->cctx);
1425 SvREFCNT_dec (coro->args);
1426
1427 if (coro->next) coro->next->prev = coro->prev; 1718 if (coro->next) coro->next->prev = coro->prev;
1428 if (coro->prev) coro->prev->next = coro->next; 1719 if (coro->prev) coro->prev->next = coro->next;
1429 if (coro == coro_first) coro_first = coro->next; 1720 if (coro == coro_first) coro_first = coro->next;
1430 1721
1431 return 1; 1722 if (coro->mainstack
1723 && coro->mainstack != main_mainstack
1724 && coro->slot
1725 && !PL_dirty)
1726 destroy_perl (aTHX_ coro);
1727
1728 cctx_destroy (coro->cctx);
1729 SvREFCNT_dec (coro->startcv);
1730 SvREFCNT_dec (coro->args);
1731 SvREFCNT_dec (coro->swap_sv);
1732 SvREFCNT_dec (CORO_THROW);
1733
1734 coro_call_on_destroy (aTHX_ coro);
1735
1736 /* more destruction mayhem in coro_state_free */
1432} 1737}
1433 1738
1434static int 1739static int
1435coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1740coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1436{ 1741{
1437 struct coro *coro = (struct coro *)mg->mg_ptr; 1742 struct coro *coro = (struct coro *)mg->mg_ptr;
1438 mg->mg_ptr = 0; 1743 mg->mg_ptr = 0;
1439 1744
1440 coro->hv = 0;
1441
1442 if (--coro->refcnt < 0)
1443 {
1444 coro_state_destroy (aTHX_ coro); 1745 coro_state_destroy (aTHX_ coro);
1746 SvREFCNT_dec (coro->on_destroy);
1747 SvREFCNT_dec (coro->status);
1748
1445 Safefree (coro); 1749 Safefree (coro);
1446 }
1447 1750
1448 return 0; 1751 return 0;
1449} 1752}
1450 1753
1451static int 1754static int ecb_cold
1452coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1755coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1453{ 1756{
1454 struct coro *coro = (struct coro *)mg->mg_ptr; 1757 /* called when perl clones the current process the slow way (windows process emulation) */
1455 1758 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1456 ++coro->refcnt; 1759 mg->mg_ptr = 0;
1760 mg->mg_virtual = 0;
1457 1761
1458 return 0; 1762 return 0;
1459} 1763}
1460 1764
1461static MGVTBL coro_state_vtbl = { 1765static MGVTBL coro_state_vtbl = {
… …
1486 TRANSFER (ta, 1); 1790 TRANSFER (ta, 1);
1487} 1791}
1488 1792
1489/** Coro ********************************************************************/ 1793/** Coro ********************************************************************/
1490 1794
1491static void 1795ECB_INLINE void
1492coro_enq (pTHX_ SV *coro_sv) 1796coro_enq (pTHX_ struct coro *coro)
1493{ 1797{
1494 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1798 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1495}
1496 1799
1497static SV * 1800 SvREFCNT_inc_NN (coro->hv);
1801
1802 coro->next_ready = 0;
1803 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1804 ready [1] = coro;
1805}
1806
1807ECB_INLINE struct coro *
1498coro_deq (pTHX) 1808coro_deq (pTHX)
1499{ 1809{
1500 int prio; 1810 int prio;
1501 1811
1502 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1812 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1503 if (AvFILLp (coro_ready [prio]) >= 0) 1813 {
1504 return av_shift (coro_ready [prio]); 1814 struct coro **ready = coro_ready [prio];
1815
1816 if (ready [0])
1817 {
1818 struct coro *coro = ready [0];
1819 ready [0] = coro->next_ready;
1820 return coro;
1821 }
1822 }
1505 1823
1506 return 0; 1824 return 0;
1825}
1826
1827static void
1828invoke_sv_ready_hook_helper (void)
1829{
1830 dTHX;
1831 dSP;
1832
1833 ENTER;
1834 SAVETMPS;
1835
1836 PUSHMARK (SP);
1837 PUTBACK;
1838 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1839
1840 FREETMPS;
1841 LEAVE;
1507} 1842}
1508 1843
1509static int 1844static int
1510api_ready (pTHX_ SV *coro_sv) 1845api_ready (pTHX_ SV *coro_sv)
1511{ 1846{
1512 struct coro *coro;
1513 SV *sv_hook;
1514 void (*xs_hook)(void);
1515
1516 if (SvROK (coro_sv))
1517 coro_sv = SvRV (coro_sv);
1518
1519 coro = SvSTATE (coro_sv); 1847 struct coro *coro = SvSTATE (coro_sv);
1520 1848
1521 if (coro->flags & CF_READY) 1849 if (coro->flags & CF_READY)
1522 return 0; 1850 return 0;
1523 1851
1524 coro->flags |= CF_READY; 1852 coro->flags |= CF_READY;
1525 1853
1526 sv_hook = coro_nready ? 0 : coro_readyhook; 1854 coro_enq (aTHX_ coro);
1527 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1528 1855
1529 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv)); 1856 if (!coro_nready++)
1530 ++coro_nready; 1857 if (coroapi.readyhook)
1531 1858 coroapi.readyhook ();
1532 if (sv_hook)
1533 {
1534 dSP;
1535
1536 ENTER;
1537 SAVETMPS;
1538
1539 PUSHMARK (SP);
1540 PUTBACK;
1541 call_sv (sv_hook, G_DISCARD);
1542 SPAGAIN;
1543
1544 FREETMPS;
1545 LEAVE;
1546 }
1547
1548 if (xs_hook)
1549 xs_hook ();
1550 1859
1551 return 1; 1860 return 1;
1552} 1861}
1553 1862
1554static int 1863static int
1555api_is_ready (pTHX_ SV *coro_sv) 1864api_is_ready (pTHX_ SV *coro_sv)
1556{ 1865{
1557 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1866 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1558} 1867}
1559 1868
1869/* expects to own a reference to next->hv */
1560INLINE void 1870ECB_INLINE void
1561prepare_schedule (pTHX_ struct coro_transfer_args *ta) 1871prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1562{ 1872{
1563 SV *prev_sv, *next_sv;
1564
1565 for (;;)
1566 {
1567 next_sv = coro_deq (aTHX);
1568
1569 /* nothing to schedule: call the idle handler */
1570 if (expect_false (!next_sv))
1571 {
1572 dSP;
1573
1574 ENTER;
1575 SAVETMPS;
1576
1577 PUSHMARK (SP);
1578 PUTBACK;
1579 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1580 SPAGAIN;
1581
1582 FREETMPS;
1583 LEAVE;
1584 continue;
1585 }
1586
1587 ta->next = SvSTATE (next_sv);
1588
1589 /* cannot transfer to destroyed coros, skip and look for next */
1590 if (expect_false (ta->next->flags & CF_DESTROYED))
1591 {
1592 SvREFCNT_dec (next_sv);
1593 /* coro_nready has already been taken care of by destroy */
1594 continue;
1595 }
1596
1597 --coro_nready;
1598 break;
1599 }
1600
1601 /* free this only after the transfer */
1602 prev_sv = SvRV (coro_current); 1873 SV *prev_sv = SvRV (coro_current);
1874
1603 ta->prev = SvSTATE (prev_sv); 1875 ta->prev = SvSTATE_hv (prev_sv);
1876 ta->next = next;
1877
1604 TRANSFER_CHECK (*ta); 1878 TRANSFER_CHECK (*ta);
1605 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY)); 1879
1606 ta->next->flags &= ~CF_READY;
1607 SvRV_set (coro_current, next_sv); 1880 SvRV_set (coro_current, (SV *)next->hv);
1608 1881
1609 free_coro_mortal (aTHX); 1882 free_coro_mortal (aTHX);
1610 coro_mortal = prev_sv; 1883 coro_mortal = prev_sv;
1611} 1884}
1612 1885
1886static void
1887prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1888{
1889 for (;;)
1890 {
1891 struct coro *next = coro_deq (aTHX);
1892
1893 if (ecb_expect_true (next))
1894 {
1895 /* cannot transfer to destroyed coros, skip and look for next */
1896 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1897 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1898 else
1899 {
1900 next->flags &= ~CF_READY;
1901 --coro_nready;
1902
1903 prepare_schedule_to (aTHX_ ta, next);
1904 break;
1905 }
1906 }
1907 else
1908 {
1909 /* nothing to schedule: call the idle handler */
1910 if (SvROK (sv_idle)
1911 && SvOBJECT (SvRV (sv_idle)))
1912 {
1913 if (SvRV (sv_idle) == SvRV (coro_current))
1914 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1915
1916 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1917 api_ready (aTHX_ SvRV (sv_idle));
1918 --coro_nready;
1919 }
1920 else
1921 {
1922 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1923 dSP;
1924
1925 ENTER;
1926 SAVETMPS;
1927
1928 PUSHMARK (SP);
1929 PUTBACK;
1930 call_sv (sv_idle, G_VOID | G_DISCARD);
1931
1932 FREETMPS;
1933 LEAVE;
1934 }
1935 }
1936 }
1937}
1938
1613INLINE void 1939ECB_INLINE void
1614prepare_cede (pTHX_ struct coro_transfer_args *ta) 1940prepare_cede (pTHX_ struct coro_transfer_args *ta)
1615{ 1941{
1616 api_ready (aTHX_ coro_current); 1942 api_ready (aTHX_ coro_current);
1617 prepare_schedule (aTHX_ ta); 1943 prepare_schedule (aTHX_ ta);
1618} 1944}
1619 1945
1620INLINE void 1946ECB_INLINE void
1621prepare_cede_notself (pTHX_ struct coro_transfer_args *ta) 1947prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1622{ 1948{
1623 SV *prev = SvRV (coro_current); 1949 SV *prev = SvRV (coro_current);
1624 1950
1625 if (coro_nready) 1951 if (coro_nready)
… …
1638 1964
1639 prepare_schedule (aTHX_ &ta); 1965 prepare_schedule (aTHX_ &ta);
1640 TRANSFER (ta, 1); 1966 TRANSFER (ta, 1);
1641} 1967}
1642 1968
1969static void
1970api_schedule_to (pTHX_ SV *coro_sv)
1971{
1972 struct coro_transfer_args ta;
1973 struct coro *next = SvSTATE (coro_sv);
1974
1975 SvREFCNT_inc_NN (coro_sv);
1976 prepare_schedule_to (aTHX_ &ta, next);
1977}
1978
1643static int 1979static int
1644api_cede (pTHX) 1980api_cede (pTHX)
1645{ 1981{
1646 struct coro_transfer_args ta; 1982 struct coro_transfer_args ta;
1647 1983
1648 prepare_cede (aTHX_ &ta); 1984 prepare_cede (aTHX_ &ta);
1649 1985
1650 if (expect_true (ta.prev != ta.next)) 1986 if (ecb_expect_true (ta.prev != ta.next))
1651 { 1987 {
1652 TRANSFER (ta, 1); 1988 TRANSFER (ta, 1);
1653 return 1; 1989 return 1;
1654 } 1990 }
1655 else 1991 else
… …
1674static void 2010static void
1675api_trace (pTHX_ SV *coro_sv, int flags) 2011api_trace (pTHX_ SV *coro_sv, int flags)
1676{ 2012{
1677 struct coro *coro = SvSTATE (coro_sv); 2013 struct coro *coro = SvSTATE (coro_sv);
1678 2014
2015 if (coro->flags & CF_RUNNING)
2016 croak ("cannot enable tracing on a running coroutine, caught");
2017
1679 if (flags & CC_TRACE) 2018 if (flags & CC_TRACE)
1680 { 2019 {
1681 if (!coro->cctx) 2020 if (!coro->cctx)
1682 coro->cctx = cctx_new_run (); 2021 coro->cctx = cctx_new_run ();
1683 else if (!(coro->cctx->flags & CC_TRACE)) 2022 else if (!(coro->cctx->flags & CC_TRACE))
1684 croak ("cannot enable tracing on coroutine with custom stack,"); 2023 croak ("cannot enable tracing on coroutine with custom stack, caught");
1685 2024
1686 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 2025 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1687 } 2026 }
1688 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 2027 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1689 { 2028 {
… …
1694 else 2033 else
1695 coro->slot->runops = RUNOPS_DEFAULT; 2034 coro->slot->runops = RUNOPS_DEFAULT;
1696 } 2035 }
1697} 2036}
1698 2037
2038static void
2039coro_push_av (pTHX_ AV *av, I32 gimme_v)
2040{
2041 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2042 {
2043 dSP;
2044
2045 if (gimme_v == G_SCALAR)
2046 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2047 else
2048 {
2049 int i;
2050 EXTEND (SP, AvFILLp (av) + 1);
2051
2052 for (i = 0; i <= AvFILLp (av); ++i)
2053 PUSHs (AvARRAY (av)[i]);
2054 }
2055
2056 PUTBACK;
2057 }
2058}
2059
2060static void
2061coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2062{
2063 if (!coro->on_destroy)
2064 coro->on_destroy = newAV ();
2065
2066 av_push (coro->on_destroy, cb);
2067}
2068
2069static void
2070slf_destroy_join (pTHX_ struct CoroSLF *frame)
2071{
2072 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2073}
2074
2075static int
2076slf_check_join (pTHX_ struct CoroSLF *frame)
2077{
2078 struct coro *coro = (struct coro *)frame->data;
2079
2080 if (!coro->status)
2081 return 1;
2082
2083 frame->destroy = 0;
2084
2085 coro_push_av (aTHX_ coro->status, GIMME_V);
2086
2087 SvREFCNT_dec ((SV *)coro->hv);
2088
2089 return 0;
2090}
2091
2092static void
2093slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2094{
2095 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2096
2097 if (items > 1)
2098 croak ("join called with too many arguments");
2099
2100 if (coro->status)
2101 frame->prepare = prepare_nop;
2102 else
2103 {
2104 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2105 frame->prepare = prepare_schedule;
2106 }
2107
2108 frame->check = slf_check_join;
2109 frame->destroy = slf_destroy_join;
2110 frame->data = (void *)coro;
2111 SvREFCNT_inc (coro->hv);
2112}
2113
2114static void
2115coro_call_on_destroy (pTHX_ struct coro *coro)
2116{
2117 AV *od = coro->on_destroy;
2118
2119 if (!od)
2120 return;
2121
2122 while (AvFILLp (od) >= 0)
2123 {
2124 SV *cb = sv_2mortal (av_pop (od));
2125
2126 /* coro hv's (and only hv's at the moment) are supported as well */
2127 if (SvSTATEhv_p (aTHX_ cb))
2128 api_ready (aTHX_ cb);
2129 else
2130 {
2131 dSP; /* don't disturb outer sp */
2132 PUSHMARK (SP);
2133
2134 if (coro->status)
2135 {
2136 PUTBACK;
2137 coro_push_av (aTHX_ coro->status, G_ARRAY);
2138 SPAGAIN;
2139 }
2140
2141 PUTBACK;
2142 call_sv (cb, G_VOID | G_DISCARD);
2143 }
2144 }
2145}
2146
2147static void
2148coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2149{
2150 AV *av;
2151
2152 if (coro->status)
2153 {
2154 av = coro->status;
2155 av_clear (av);
2156 }
2157 else
2158 av = coro->status = newAV ();
2159
2160 /* items are actually not so common, so optimise for this case */
2161 if (items)
2162 {
2163 int i;
2164
2165 av_extend (av, items - 1);
2166
2167 for (i = 0; i < items; ++i)
2168 av_push (av, SvREFCNT_inc_NN (arg [i]));
2169 }
2170}
2171
2172static void
2173slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2174{
2175 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2176 api_ready (aTHX_ sv_manager);
2177
2178 frame->prepare = prepare_schedule;
2179 frame->check = slf_check_repeat;
2180
2181 /* as a minor optimisation, we could unwind all stacks here */
2182 /* but that puts extra pressure on pp_slf, and is not worth much */
2183 /*coro_unwind_stacks (aTHX);*/
2184}
2185
2186static void
2187slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2188{
2189 HV *coro_hv = (HV *)SvRV (coro_current);
2190
2191 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2192 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2193}
2194
2195static void
2196slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2197{
2198 HV *coro_hv;
2199 struct coro *coro;
2200
2201 if (items <= 0)
2202 croak ("Coro::cancel called without coro object,");
2203
2204 coro = SvSTATE (arg [0]);
2205 coro_hv = coro->hv;
2206
2207 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2208
2209 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2210 {
2211 /* coro currently busy cancelling something, so just notify it */
2212 coro->slf_frame.data = (void *)coro;
2213
2214 frame->prepare = prepare_nop;
2215 frame->check = slf_check_nop;
2216 }
2217 else if (coro_hv == (HV *)SvRV (coro_current))
2218 {
2219 /* cancelling the current coro is allowed, and equals terminate */
2220 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2221 }
2222 else
2223 {
2224 struct coro *self = SvSTATE_current;
2225
2226 /* otherwise we cancel directly, purely for speed reasons
2227 * unfortunately, this requires some magic trickery, as
2228 * somebody else could cancel us, so we have to fight the cancellation.
2229 * this is ugly, and hopefully fully worth the extra speed.
2230 * besides, I can't get the slow-but-safe version working...
2231 */
2232 slf_frame.data = 0;
2233 self->flags |= CF_NOCANCEL;
2234 coro_state_destroy (aTHX_ coro);
2235 self->flags &= ~CF_NOCANCEL;
2236
2237 if (slf_frame.data)
2238 {
2239 /* while we were busy we have been cancelled, so terminate */
2240 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2241 }
2242 else
2243 {
2244 frame->prepare = prepare_nop;
2245 frame->check = slf_check_nop;
2246 }
2247 }
2248}
2249
2250static int
2251slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2252{
2253 frame->prepare = 0;
2254 coro_unwind_stacks (aTHX);
2255
2256 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2257
2258 return 1;
2259}
2260
2261static int
2262safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2263{
2264 if (coro->cctx)
2265 croak ("coro inside C callback, unable to cancel at this time, caught");
2266
2267 if (coro->flags & CF_NEW)
2268 {
2269 coro_set_status (aTHX_ coro, arg, items);
2270 coro_state_destroy (aTHX_ coro);
2271 }
2272 else
2273 {
2274 if (!coro->slf_frame.prepare)
2275 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2276
2277 slf_destroy (aTHX_ coro);
2278
2279 coro_set_status (aTHX_ coro, arg, items);
2280 coro->slf_frame.prepare = prepare_nop;
2281 coro->slf_frame.check = slf_check_safe_cancel;
2282
2283 api_ready (aTHX_ (SV *)coro->hv);
2284 }
2285
2286 return 1;
2287}
2288
2289/*****************************************************************************/
2290/* async pool handler */
2291
2292static int
2293slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2294{
2295 HV *hv = (HV *)SvRV (coro_current);
2296 struct coro *coro = (struct coro *)frame->data;
2297
2298 if (!coro->invoke_cb)
2299 return 1; /* loop till we have invoke */
2300 else
2301 {
2302 hv_store (hv, "desc", sizeof ("desc") - 1,
2303 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2304
2305 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2306
2307 {
2308 dSP;
2309 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2310 PUTBACK;
2311 }
2312
2313 SvREFCNT_dec (GvAV (PL_defgv));
2314 GvAV (PL_defgv) = coro->invoke_av;
2315 coro->invoke_av = 0;
2316
2317 return 0;
2318 }
2319}
2320
2321static void
2322slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2323{
2324 HV *hv = (HV *)SvRV (coro_current);
2325 struct coro *coro = SvSTATE_hv ((SV *)hv);
2326
2327 if (ecb_expect_true (coro->saved_deffh))
2328 {
2329 /* subsequent iteration */
2330 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2331 coro->saved_deffh = 0;
2332
2333 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2334 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2335 {
2336 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2337 return;
2338 }
2339 else
2340 {
2341 av_clear (GvAV (PL_defgv));
2342 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2343
2344 coro->prio = 0;
2345
2346 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2347 api_trace (aTHX_ coro_current, 0);
2348
2349 frame->prepare = prepare_schedule;
2350 av_push (av_async_pool, SvREFCNT_inc (hv));
2351 }
2352 }
2353 else
2354 {
2355 /* first iteration, simply fall through */
2356 frame->prepare = prepare_nop;
2357 }
2358
2359 frame->check = slf_check_pool_handler;
2360 frame->data = (void *)coro;
2361}
2362
2363/*****************************************************************************/
2364/* rouse callback */
2365
2366#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2367
2368static void
2369coro_rouse_callback (pTHX_ CV *cv)
2370{
2371 dXSARGS;
2372 SV *data = (SV *)S_GENSUB_ARG;
2373
2374 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2375 {
2376 /* first call, set args */
2377 SV *coro = SvRV (data);
2378 AV *av = newAV ();
2379
2380 SvRV_set (data, (SV *)av);
2381
2382 /* better take a full copy of the arguments */
2383 while (items--)
2384 av_store (av, items, newSVsv (ST (items)));
2385
2386 api_ready (aTHX_ coro);
2387 SvREFCNT_dec (coro);
2388 }
2389
2390 XSRETURN_EMPTY;
2391}
2392
2393static int
2394slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2395{
2396 SV *data = (SV *)frame->data;
2397
2398 if (CORO_THROW)
2399 return 0;
2400
2401 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2402 return 1;
2403
2404 /* now push all results on the stack */
2405 {
2406 dSP;
2407 AV *av = (AV *)SvRV (data);
2408 int i;
2409
2410 EXTEND (SP, AvFILLp (av) + 1);
2411 for (i = 0; i <= AvFILLp (av); ++i)
2412 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2413
2414 /* we have stolen the elements, so set length to zero and free */
2415 AvFILLp (av) = -1;
2416 av_undef (av);
2417
2418 PUTBACK;
2419 }
2420
2421 return 0;
2422}
2423
2424static void
2425slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2426{
2427 SV *cb;
2428
2429 if (items)
2430 cb = arg [0];
2431 else
2432 {
2433 struct coro *coro = SvSTATE_current;
2434
2435 if (!coro->rouse_cb)
2436 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2437
2438 cb = sv_2mortal (coro->rouse_cb);
2439 coro->rouse_cb = 0;
2440 }
2441
2442 if (!SvROK (cb)
2443 || SvTYPE (SvRV (cb)) != SVt_PVCV
2444 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2445 croak ("Coro::rouse_wait called with illegal callback argument,");
2446
2447 {
2448 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2449 SV *data = (SV *)S_GENSUB_ARG;
2450
2451 frame->data = (void *)data;
2452 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2453 frame->check = slf_check_rouse_wait;
2454 }
2455}
2456
2457static SV *
2458coro_new_rouse_cb (pTHX)
2459{
2460 HV *hv = (HV *)SvRV (coro_current);
2461 struct coro *coro = SvSTATE_hv (hv);
2462 SV *data = newRV_inc ((SV *)hv);
2463 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2464
2465 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2466 SvREFCNT_dec (data); /* magicext increases the refcount */
2467
2468 SvREFCNT_dec (coro->rouse_cb);
2469 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2470
2471 return cb;
2472}
2473
2474/*****************************************************************************/
2475/* schedule-like-function opcode (SLF) */
2476
2477static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2478static const CV *slf_cv;
2479static SV **slf_argv;
2480static int slf_argc, slf_arga; /* count, allocated */
2481static I32 slf_ax; /* top of stack, for restore */
2482
2483/* this restores the stack in the case we patched the entersub, to */
2484/* recreate the stack frame as perl will on following calls */
2485/* since entersub cleared the stack */
2486static OP *
2487pp_restore (pTHX)
2488{
2489 int i;
2490 SV **SP = PL_stack_base + slf_ax;
2491
2492 PUSHMARK (SP);
2493
2494 EXTEND (SP, slf_argc + 1);
2495
2496 for (i = 0; i < slf_argc; ++i)
2497 PUSHs (sv_2mortal (slf_argv [i]));
2498
2499 PUSHs ((SV *)CvGV (slf_cv));
2500
2501 RETURNOP (slf_restore.op_first);
2502}
2503
2504static void
2505slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2506{
2507 SV **arg = (SV **)slf_frame.data;
2508
2509 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2510}
2511
2512static void
2513slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2514{
2515 if (items != 2)
2516 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2517
2518 frame->prepare = slf_prepare_transfer;
2519 frame->check = slf_check_nop;
2520 frame->data = (void *)arg; /* let's hope it will stay valid */
2521}
2522
2523static void
2524slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2525{
2526 frame->prepare = prepare_schedule;
2527 frame->check = slf_check_nop;
2528}
2529
2530static void
2531slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2532{
2533 struct coro *next = (struct coro *)slf_frame.data;
2534
2535 SvREFCNT_inc_NN (next->hv);
2536 prepare_schedule_to (aTHX_ ta, next);
2537}
2538
2539static void
2540slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2541{
2542 if (!items)
2543 croak ("Coro::schedule_to expects a coroutine argument, caught");
2544
2545 frame->data = (void *)SvSTATE (arg [0]);
2546 frame->prepare = slf_prepare_schedule_to;
2547 frame->check = slf_check_nop;
2548}
2549
2550static void
2551slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2552{
2553 api_ready (aTHX_ SvRV (coro_current));
2554
2555 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2556}
2557
2558static void
2559slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2560{
2561 frame->prepare = prepare_cede;
2562 frame->check = slf_check_nop;
2563}
2564
2565static void
2566slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2567{
2568 frame->prepare = prepare_cede_notself;
2569 frame->check = slf_check_nop;
2570}
2571
2572/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2573static void
2574slf_destroy (pTHX_ struct coro *coro)
2575{
2576 /* this callback is reserved for slf functions needing to do cleanup */
2577 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2578 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2579
2580 /*
2581 * The on_destroy above most likely is from an SLF call.
2582 * Since by definition the SLF call will not finish when we destroy
2583 * the coro, we will have to force-finish it here, otherwise
2584 * cleanup functions cannot call SLF functions.
2585 */
2586 coro->slf_frame.prepare = 0;
2587}
2588
2589/*
2590 * these not obviously related functions are all rolled into one
2591 * function to increase chances that they all will call transfer with the same
2592 * stack offset
2593 * SLF stands for "schedule-like-function".
2594 */
2595static OP *
2596pp_slf (pTHX)
2597{
2598 I32 checkmark; /* mark SP to see how many elements check has pushed */
2599
2600 /* set up the slf frame, unless it has already been set-up */
2601 /* the latter happens when a new coro has been started */
2602 /* or when a new cctx was attached to an existing coroutine */
2603 if (ecb_expect_true (!slf_frame.prepare))
2604 {
2605 /* first iteration */
2606 dSP;
2607 SV **arg = PL_stack_base + TOPMARK + 1;
2608 int items = SP - arg; /* args without function object */
2609 SV *gv = *sp;
2610
2611 /* do a quick consistency check on the "function" object, and if it isn't */
2612 /* for us, divert to the real entersub */
2613 if (SvTYPE (gv) != SVt_PVGV
2614 || !GvCV (gv)
2615 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2616 return PL_ppaddr[OP_ENTERSUB](aTHX);
2617
2618 if (!(PL_op->op_flags & OPf_STACKED))
2619 {
2620 /* ampersand-form of call, use @_ instead of stack */
2621 AV *av = GvAV (PL_defgv);
2622 arg = AvARRAY (av);
2623 items = AvFILLp (av) + 1;
2624 }
2625
2626 /* now call the init function, which needs to set up slf_frame */
2627 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2628 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2629
2630 /* pop args */
2631 SP = PL_stack_base + POPMARK;
2632
2633 PUTBACK;
2634 }
2635
2636 /* now that we have a slf_frame, interpret it! */
2637 /* we use a callback system not to make the code needlessly */
2638 /* complicated, but so we can run multiple perl coros from one cctx */
2639
2640 do
2641 {
2642 struct coro_transfer_args ta;
2643
2644 slf_frame.prepare (aTHX_ &ta);
2645 TRANSFER (ta, 0);
2646
2647 checkmark = PL_stack_sp - PL_stack_base;
2648 }
2649 while (slf_frame.check (aTHX_ &slf_frame));
2650
2651 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2652
2653 /* exception handling */
2654 if (ecb_expect_false (CORO_THROW))
2655 {
2656 SV *exception = sv_2mortal (CORO_THROW);
2657
2658 CORO_THROW = 0;
2659 sv_setsv (ERRSV, exception);
2660 croak (0);
2661 }
2662
2663 /* return value handling - mostly like entersub */
2664 /* make sure we put something on the stack in scalar context */
2665 if (GIMME_V == G_SCALAR
2666 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2667 {
2668 dSP;
2669 SV **bot = PL_stack_base + checkmark;
2670
2671 if (sp == bot) /* too few, push undef */
2672 bot [1] = &PL_sv_undef;
2673 else /* too many, take last one */
2674 bot [1] = *sp;
2675
2676 SP = bot + 1;
2677
2678 PUTBACK;
2679 }
2680
2681 return NORMAL;
2682}
2683
2684static void
2685api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2686{
2687 int i;
2688 SV **arg = PL_stack_base + ax;
2689 int items = PL_stack_sp - arg + 1;
2690
2691 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2692
2693 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2694 && PL_op->op_ppaddr != pp_slf)
2695 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2696
2697 CvFLAGS (cv) |= CVf_SLF;
2698 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2699 slf_cv = cv;
2700
2701 /* we patch the op, and then re-run the whole call */
2702 /* we have to put the same argument on the stack for this to work */
2703 /* and this will be done by pp_restore */
2704 slf_restore.op_next = (OP *)&slf_restore;
2705 slf_restore.op_type = OP_CUSTOM;
2706 slf_restore.op_ppaddr = pp_restore;
2707 slf_restore.op_first = PL_op;
2708
2709 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2710
2711 if (PL_op->op_flags & OPf_STACKED)
2712 {
2713 if (items > slf_arga)
2714 {
2715 slf_arga = items;
2716 Safefree (slf_argv);
2717 New (0, slf_argv, slf_arga, SV *);
2718 }
2719
2720 slf_argc = items;
2721
2722 for (i = 0; i < items; ++i)
2723 slf_argv [i] = SvREFCNT_inc (arg [i]);
2724 }
2725 else
2726 slf_argc = 0;
2727
2728 PL_op->op_ppaddr = pp_slf;
2729 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2730
2731 PL_op = (OP *)&slf_restore;
2732}
2733
2734/*****************************************************************************/
2735/* dynamic wind */
2736
2737static void
2738on_enterleave_call (pTHX_ SV *cb)
2739{
2740 dSP;
2741
2742 PUSHSTACK;
2743
2744 PUSHMARK (SP);
2745 PUTBACK;
2746 call_sv (cb, G_VOID | G_DISCARD);
2747 SPAGAIN;
2748
2749 POPSTACK;
2750}
2751
2752static SV *
2753coro_avp_pop_and_free (pTHX_ AV **avp)
2754{
2755 AV *av = *avp;
2756 SV *res = av_pop (av);
2757
2758 if (AvFILLp (av) < 0)
2759 {
2760 *avp = 0;
2761 SvREFCNT_dec (av);
2762 }
2763
2764 return res;
2765}
2766
2767static void
2768coro_pop_on_enter (pTHX_ void *coro)
2769{
2770 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2771 SvREFCNT_dec (cb);
2772}
2773
2774static void
2775coro_pop_on_leave (pTHX_ void *coro)
2776{
2777 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2778 on_enterleave_call (aTHX_ sv_2mortal (cb));
2779}
2780
1699/*****************************************************************************/ 2781/*****************************************************************************/
1700/* PerlIO::cede */ 2782/* PerlIO::cede */
1701 2783
1702typedef struct 2784typedef struct
1703{ 2785{
1704 PerlIOBuf base; 2786 PerlIOBuf base;
1705 NV next, every; 2787 NV next, every;
1706} PerlIOCede; 2788} PerlIOCede;
1707 2789
1708static IV 2790static IV ecb_cold
1709PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab) 2791PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1710{ 2792{
1711 PerlIOCede *self = PerlIOSelf (f, PerlIOCede); 2793 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1712 2794
1713 self->every = SvCUR (arg) ? SvNV (arg) : 0.01; 2795 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1714 self->next = nvtime () + self->every; 2796 self->next = nvtime () + self->every;
1715 2797
1716 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab); 2798 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1717} 2799}
1718 2800
1719static SV * 2801static SV * ecb_cold
1720PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags) 2802PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1721{ 2803{
1722 PerlIOCede *self = PerlIOSelf (f, PerlIOCede); 2804 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1723 2805
1724 return newSVnv (self->every); 2806 return newSVnv (self->every);
… …
1770 PerlIOBuf_get_cnt, 2852 PerlIOBuf_get_cnt,
1771 PerlIOBuf_set_ptrcnt, 2853 PerlIOBuf_set_ptrcnt,
1772}; 2854};
1773 2855
1774/*****************************************************************************/ 2856/*****************************************************************************/
2857/* Coro::Semaphore & Coro::Signal */
1775 2858
1776static const CV *slf_cv; /* for quick consistency check */
1777
1778static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1779static SV *slf_arg0;
1780static SV *slf_arg1;
1781static SV *slf_arg2;
1782
1783/* this restores the stack in the case we patched the entersub, to */
1784/* recreate the stack frame as perl will on following calls */
1785/* since entersub cleared the stack */
1786static OP * 2859static SV *
1787pp_restore (pTHX) 2860coro_waitarray_new (pTHX_ int count)
1788{ 2861{
1789 dSP; 2862 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2863 AV *av = newAV ();
2864 SV **ary;
1790 2865
1791 PUSHMARK (SP); 2866 /* unfortunately, building manually saves memory */
2867 Newx (ary, 2, SV *);
2868 AvALLOC (av) = ary;
2869#if PERL_VERSION_ATLEAST (5,10,0)
2870 AvARRAY (av) = ary;
2871#else
2872 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2873 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2874 SvPVX ((SV *)av) = (char *)ary;
2875#endif
2876 AvMAX (av) = 1;
2877 AvFILLp (av) = 0;
2878 ary [0] = newSViv (count);
1792 2879
1793 EXTEND (SP, 3); 2880 return newRV_noinc ((SV *)av);
1794 if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1795 if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1796 if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
1797 PUSHs ((SV *)CvGV (slf_cv));
1798
1799 RETURNOP (slf_restore.op_first);
1800} 2881}
1801 2882
1802static void 2883/* semaphore */
1803slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1804{
1805 prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1806}
1807 2884
1808static void 2885static void
1809slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1810{
1811 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1812
1813 frame->prepare = slf_prepare_set_stacklevel;
1814 frame->check = slf_check_nop;
1815 frame->data = (void *)SvIV (arg [0]);
1816}
1817
1818static void
1819slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1820{
1821 SV **arg = (SV **)slf_frame.data;
1822
1823 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1824}
1825
1826static void
1827slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1828{
1829 if (items != 2)
1830 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1831
1832 frame->prepare = slf_prepare_transfer;
1833 frame->check = slf_check_nop;
1834 frame->data = (void *)arg; /* let's hope it will stay valid */
1835}
1836
1837static void
1838slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1839{
1840 frame->prepare = prepare_schedule;
1841 frame->check = slf_check_nop;
1842}
1843
1844static void
1845slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1846{
1847 frame->prepare = prepare_cede;
1848 frame->check = slf_check_nop;
1849}
1850
1851static void
1852slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1853{
1854 frame->prepare = prepare_cede_notself;
1855 frame->check = slf_check_nop;
1856}
1857
1858/* we hijack an hopefully unused CV flag for our purposes */
1859#define CVf_SLF 0x4000
1860
1861/*
1862 * these not obviously related functions are all rolled into one
1863 * function to increase chances that they all will call transfer with the same
1864 * stack offset
1865 * SLF stands for "schedule-like-function".
1866 */
1867static OP *
1868pp_slf (pTHX)
1869{
1870 I32 checkmark; /* mark SP to see how many elements check has pushed */
1871
1872 /* set up the slf frame, unless it has already been set-up */
1873 /* the latter happens when a new coro has been started */
1874 /* or when a new cctx was attached to an existing coroutine */
1875 if (expect_true (!slf_frame.prepare))
1876 {
1877 /* first iteration */
1878 dSP;
1879 SV **arg = PL_stack_base + TOPMARK + 1;
1880 int items = SP - arg; /* args without function object */
1881 SV *gv = *sp;
1882
1883 /* do a quick consistency check on the "function" object, and if it isn't */
1884 /* for us, divert to the real entersub */
1885 if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1886 return PL_ppaddr[OP_ENTERSUB](aTHX);
1887
1888 /* pop args */
1889 SP = PL_stack_base + POPMARK;
1890
1891 if (!(PL_op->op_flags & OPf_STACKED))
1892 {
1893 /* ampersand-form of call, use @_ instead of stack */
1894 AV *av = GvAV (PL_defgv);
1895 arg = AvARRAY (av);
1896 items = AvFILLp (av) + 1;
1897 }
1898
1899 PUTBACK;
1900
1901 /* now call the init function, which needs to set up slf_frame */
1902 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1903 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1904 }
1905
1906 /* now that we have a slf_frame, interpret it! */
1907 /* we use a callback system not to make the code needlessly */
1908 /* complicated, but so we can run multiple perl coros from one cctx */
1909
1910 do
1911 {
1912 struct coro_transfer_args ta;
1913
1914 slf_frame.prepare (aTHX_ &ta);
1915 TRANSFER (ta, 0);
1916
1917 checkmark = PL_stack_sp - PL_stack_base;
1918 }
1919 while (slf_frame.check (aTHX_ &slf_frame));
1920
1921 {
1922 dSP;
1923 SV **bot = PL_stack_base + checkmark;
1924 int gimme = GIMME_V;
1925
1926 slf_frame.prepare = 0; /* invalidate the frame, so it gets initialised again next time */
1927
1928 /* make sure we put something on the stack in scalar context */
1929 if (gimme == G_SCALAR)
1930 {
1931 if (sp == bot)
1932 XPUSHs (&PL_sv_undef);
1933
1934 SP = bot + 1;
1935 }
1936
1937 PUTBACK;
1938 }
1939
1940 return NORMAL;
1941}
1942
1943static void
1944api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, SV **arg, int items)
1945{
1946 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1947
1948 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1949 && PL_op->op_ppaddr != pp_slf)
1950 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1951
1952 if (items > 3)
1953 croak ("Coro only supports up to three arguments to SLF functions currently (not %d), caught", items);
1954
1955 CvFLAGS (cv) |= CVf_SLF;
1956 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1957 slf_cv = cv;
1958
1959 /* we patch the op, and then re-run the whole call */
1960 /* we have to put the same argument on the stack for this to work */
1961 /* and this will be done by pp_restore */
1962 slf_restore.op_next = (OP *)&slf_restore;
1963 slf_restore.op_type = OP_CUSTOM;
1964 slf_restore.op_ppaddr = pp_restore;
1965 slf_restore.op_first = PL_op;
1966
1967 slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
1968 slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
1969 slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
1970
1971 PL_op->op_ppaddr = pp_slf;
1972
1973 PL_op = (OP *)&slf_restore;
1974}
1975
1976/*****************************************************************************/
1977
1978static void
1979coro_semaphore_adjust (AV *av, int adjust) 2886coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
1980{ 2887{
1981 SV *count_sv = AvARRAY (av)[0]; 2888 SV *count_sv = AvARRAY (av)[0];
1982 IV count = SvIVX (count_sv); 2889 IV count = SvIVX (count_sv);
1983 2890
1984 count += adjust; 2891 count += adjust;
1985 SvIVX (count_sv) = count; 2892 SvIVX (count_sv) = count;
1986 2893
1987 /* now wake up as many waiters as possible */ 2894 /* now wake up as many waiters as are expected to lock */
1988 while (count > 0 && AvFILLp (av) >= count) 2895 while (count > 0 && AvFILLp (av) > 0)
1989 { 2896 {
1990 SV *cb; 2897 SV *cb;
1991 2898
1992 /* swap first two elements so we can shift a waiter */ 2899 /* swap first two elements so we can shift a waiter */
1993 AvARRAY (av)[0] = AvARRAY (av)[1]; 2900 AvARRAY (av)[0] = AvARRAY (av)[1];
1994 AvARRAY (av)[1] = count_sv; 2901 AvARRAY (av)[1] = count_sv;
1995 cb = av_shift (av); 2902 cb = av_shift (av);
1996 2903
1997 if (SvOBJECT (cb)) 2904 if (SvOBJECT (cb))
2905 {
1998 api_ready (aTHX_ cb); 2906 api_ready (aTHX_ cb);
1999 else 2907 --count;
2000 croak ("callbacks not yet supported"); 2908 }
2909 else if (SvTYPE (cb) == SVt_PVCV)
2910 {
2911 dSP;
2912 PUSHMARK (SP);
2913 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2914 PUTBACK;
2915 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2916 }
2001 2917
2002 SvREFCNT_dec (cb); 2918 SvREFCNT_dec (cb);
2003
2004 --count;
2005 } 2919 }
2006} 2920}
2007 2921
2008static void 2922static void
2009coro_semaphore_on_destroy (pTHX_ struct coro *coro) 2923coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2010{ 2924{
2011 /* call $sem->adjust (0) to possibly wake up some waiters */ 2925 /* call $sem->adjust (0) to possibly wake up some other waiters */
2012 coro_semaphore_adjust ((AV *)coro->slf_frame.data, 0); 2926 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2013} 2927}
2014 2928
2015static int 2929static int
2016slf_check_semaphore_down (pTHX_ struct CoroSLF *frame) 2930slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2017{ 2931{
2018 AV *av = (AV *)frame->data; 2932 AV *av = (AV *)frame->data;
2019 SV *count_sv = AvARRAY (av)[0]; 2933 SV *count_sv = AvARRAY (av)[0];
2934 SV *coro_hv = SvRV (coro_current);
2020 2935
2936 /* if we are about to throw, don't actually acquire the lock, just throw */
2937 if (CORO_THROW)
2938 return 0;
2021 if (SvIVX (count_sv) > 0) 2939 else if (SvIVX (count_sv) > 0)
2022 { 2940 {
2023 SvSTATE (coro_current)->on_destroy = 0; 2941 frame->destroy = 0;
2942
2943 if (acquire)
2024 SvIVX (count_sv) = SvIVX (count_sv) - 1; 2944 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2945 else
2946 coro_semaphore_adjust (aTHX_ av, 0);
2947
2025 return 0; 2948 return 0;
2026 } 2949 }
2027 else 2950 else
2028 { 2951 {
2029 int i; 2952 int i;
2030 /* if we were woken up but can't down, we look through the whole */ 2953 /* if we were woken up but can't down, we look through the whole */
2031 /* waiters list and only add us if we aren't in there already */ 2954 /* waiters list and only add us if we aren't in there already */
2032 /* this avoids some degenerate memory usage cases */ 2955 /* this avoids some degenerate memory usage cases */
2033 2956 for (i = AvFILLp (av); i > 0; --i) // i > 0 is not an off-by-one bug
2034 for (i = 1; i <= AvFILLp (av); ++i)
2035 if (AvARRAY (av)[i] == SvRV (coro_current)) 2957 if (AvARRAY (av)[i] == coro_hv)
2036 return 1; 2958 return 1;
2037 2959
2038 av_push (av, SvREFCNT_inc (SvRV (coro_current))); 2960 av_push (av, SvREFCNT_inc (coro_hv));
2039 return 1; 2961 return 1;
2040 } 2962 }
2041} 2963}
2042 2964
2043static void 2965static int
2966slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2967{
2968 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2969}
2970
2971static int
2972slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2973{
2974 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2975}
2976
2977static void
2044slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items) 2978slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2045{ 2979{
2046 AV *av = (AV *)SvRV (arg [0]); 2980 AV *av = (AV *)SvRV (arg [0]);
2047 2981
2048 if (SvIVX (AvARRAY (av)[0]) > 0) 2982 if (SvIVX (AvARRAY (av)[0]) > 0)
2049 { 2983 {
… …
2054 { 2988 {
2055 av_push (av, SvREFCNT_inc (SvRV (coro_current))); 2989 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2056 2990
2057 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av)); 2991 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2058 frame->prepare = prepare_schedule; 2992 frame->prepare = prepare_schedule;
2059
2060 /* to avoid race conditions when a woken-up coro gets terminated */ 2993 /* to avoid race conditions when a woken-up coro gets terminated */
2061 /* we arrange for a temporary on_destroy that calls adjust (0) */ 2994 /* we arrange for a temporary on_destroy that calls adjust (0) */
2062 SvSTATE (coro_current)->on_destroy = coro_semaphore_on_destroy; 2995 frame->destroy = coro_semaphore_destroy;
2063 } 2996 }
2997}
2064 2998
2999static void
3000slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3001{
3002 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2065 frame->check = slf_check_semaphore_down; 3003 frame->check = slf_check_semaphore_down;
3004}
2066 3005
3006static void
3007slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3008{
3009 if (items >= 2)
3010 {
3011 /* callback form */
3012 AV *av = (AV *)SvRV (arg [0]);
3013 SV *cb_cv = s_get_cv_croak (arg [1]);
3014
3015 av_push (av, SvREFCNT_inc_NN (cb_cv));
3016
3017 if (SvIVX (AvARRAY (av)[0]) > 0)
3018 coro_semaphore_adjust (aTHX_ av, 0);
3019
3020 frame->prepare = prepare_nop;
3021 frame->check = slf_check_nop;
3022 }
3023 else
3024 {
3025 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3026 frame->check = slf_check_semaphore_wait;
3027 }
3028}
3029
3030/* signal */
3031
3032static void
3033coro_signal_wake (pTHX_ AV *av, int count)
3034{
3035 SvIVX (AvARRAY (av)[0]) = 0;
3036
3037 /* now signal count waiters */
3038 while (count > 0 && AvFILLp (av) > 0)
3039 {
3040 SV *cb;
3041
3042 /* swap first two elements so we can shift a waiter */
3043 cb = AvARRAY (av)[0];
3044 AvARRAY (av)[0] = AvARRAY (av)[1];
3045 AvARRAY (av)[1] = cb;
3046
3047 cb = av_shift (av);
3048
3049 if (SvTYPE (cb) == SVt_PVCV)
3050 {
3051 dSP;
3052 PUSHMARK (SP);
3053 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3054 PUTBACK;
3055 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3056 }
3057 else
3058 {
3059 api_ready (aTHX_ cb);
3060 sv_setiv (cb, 0); /* signal waiter */
3061 }
3062
3063 SvREFCNT_dec (cb);
3064
3065 --count;
3066 }
3067}
3068
3069static int
3070slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3071{
3072 /* if we are about to throw, also stop waiting */
3073 return SvROK ((SV *)frame->data) && !CORO_THROW;
3074}
3075
3076static void
3077slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3078{
3079 AV *av = (AV *)SvRV (arg [0]);
3080
3081 if (items >= 2)
3082 {
3083 SV *cb_cv = s_get_cv_croak (arg [1]);
3084 av_push (av, SvREFCNT_inc_NN (cb_cv));
3085
3086 if (SvIVX (AvARRAY (av)[0]))
3087 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3088
3089 frame->prepare = prepare_nop;
3090 frame->check = slf_check_nop;
3091 }
3092 else if (SvIVX (AvARRAY (av)[0]))
3093 {
3094 SvIVX (AvARRAY (av)[0]) = 0;
3095 frame->prepare = prepare_nop;
3096 frame->check = slf_check_nop;
3097 }
3098 else
3099 {
3100 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3101
3102 av_push (av, waiter);
3103
3104 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3105 frame->prepare = prepare_schedule;
3106 frame->check = slf_check_signal_wait;
3107 }
2067} 3108}
2068 3109
2069/*****************************************************************************/ 3110/*****************************************************************************/
3111/* Coro::AIO */
2070 3112
2071#define GENSUB_ARG CvXSUBANY (cv).any_ptr 3113#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2072 3114
2073/* create a closure from XS, returns a code reference */ 3115/* helper storage struct */
2074/* the arg can be accessed via GENSUB_ARG from the callback */ 3116struct io_state
2075/* the callback must use dXSARGS/XSRETURN */ 3117{
3118 int errorno;
3119 I32 laststype; /* U16 in 5.10.0 */
3120 int laststatval;
3121 Stat_t statcache;
3122};
3123
3124static void
3125coro_aio_callback (pTHX_ CV *cv)
3126{
3127 dXSARGS;
3128 AV *state = (AV *)S_GENSUB_ARG;
3129 SV *coro = av_pop (state);
3130 SV *data_sv = newSV (sizeof (struct io_state));
3131
3132 av_extend (state, items - 1);
3133
3134 sv_upgrade (data_sv, SVt_PV);
3135 SvCUR_set (data_sv, sizeof (struct io_state));
3136 SvPOK_only (data_sv);
3137
3138 {
3139 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3140
3141 data->errorno = errno;
3142 data->laststype = PL_laststype;
3143 data->laststatval = PL_laststatval;
3144 data->statcache = PL_statcache;
3145 }
3146
3147 /* now build the result vector out of all the parameters and the data_sv */
3148 {
3149 int i;
3150
3151 for (i = 0; i < items; ++i)
3152 av_push (state, SvREFCNT_inc_NN (ST (i)));
3153 }
3154
3155 av_push (state, data_sv);
3156
3157 api_ready (aTHX_ coro);
3158 SvREFCNT_dec (coro);
3159 SvREFCNT_dec ((AV *)state);
3160}
3161
3162static int
3163slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3164{
3165 AV *state = (AV *)frame->data;
3166
3167 /* if we are about to throw, return early */
3168 /* this does not cancel the aio request, but at least */
3169 /* it quickly returns */
3170 if (CORO_THROW)
3171 return 0;
3172
3173 /* one element that is an RV? repeat! */
3174 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3175 return 1;
3176
3177 /* restore status */
3178 {
3179 SV *data_sv = av_pop (state);
3180 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3181
3182 errno = data->errorno;
3183 PL_laststype = data->laststype;
3184 PL_laststatval = data->laststatval;
3185 PL_statcache = data->statcache;
3186
3187 SvREFCNT_dec (data_sv);
3188 }
3189
3190 /* push result values */
3191 {
3192 dSP;
3193 int i;
3194
3195 EXTEND (SP, AvFILLp (state) + 1);
3196 for (i = 0; i <= AvFILLp (state); ++i)
3197 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3198
3199 PUTBACK;
3200 }
3201
3202 return 0;
3203}
3204
3205static void
3206slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3207{
3208 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3209 SV *coro_hv = SvRV (coro_current);
3210 struct coro *coro = SvSTATE_hv (coro_hv);
3211
3212 /* put our coroutine id on the state arg */
3213 av_push (state, SvREFCNT_inc_NN (coro_hv));
3214
3215 /* first see whether we have a non-zero priority and set it as AIO prio */
3216 if (coro->prio)
3217 {
3218 dSP;
3219
3220 static SV *prio_cv;
3221 static SV *prio_sv;
3222
3223 if (ecb_expect_false (!prio_cv))
3224 {
3225 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3226 prio_sv = newSViv (0);
3227 }
3228
3229 PUSHMARK (SP);
3230 sv_setiv (prio_sv, coro->prio);
3231 XPUSHs (prio_sv);
3232
3233 PUTBACK;
3234 call_sv (prio_cv, G_VOID | G_DISCARD);
3235 }
3236
3237 /* now call the original request */
3238 {
3239 dSP;
3240 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3241 int i;
3242
3243 PUSHMARK (SP);
3244
3245 /* first push all args to the stack */
3246 EXTEND (SP, items + 1);
3247
3248 for (i = 0; i < items; ++i)
3249 PUSHs (arg [i]);
3250
3251 /* now push the callback closure */
3252 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3253
3254 /* now call the AIO function - we assume our request is uncancelable */
3255 PUTBACK;
3256 call_sv ((SV *)req, G_VOID | G_DISCARD);
3257 }
3258
3259 /* now that the request is going, we loop till we have a result */
3260 frame->data = (void *)state;
3261 frame->prepare = prepare_schedule;
3262 frame->check = slf_check_aio_req;
3263}
3264
3265static void
3266coro_aio_req_xs (pTHX_ CV *cv)
3267{
3268 dXSARGS;
3269
3270 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3271
3272 XSRETURN_EMPTY;
3273}
3274
3275/*****************************************************************************/
3276
3277#if CORO_CLONE
3278# include "clone.c"
3279#endif
3280
3281/*****************************************************************************/
3282
2076static SV * 3283static SV *
2077gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg) 3284coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
2078{ 3285{
2079 CV *cv = (CV *)NEWSV (0, 0); 3286 SV *coro_sv;
3287 struct coro *coro;
3288 MAGIC *mg;
3289 HV *hv;
3290 SV *cb;
3291 int i;
2080 3292
2081 sv_upgrade ((SV *)cv, SVt_PVCV); 3293 if (argc > 0)
3294 {
3295 cb = s_get_cv_croak (argv [0]);
2082 3296
2083 CvANON_on (cv); 3297 if (!is_coro)
2084 CvISXSUB_on (cv); 3298 {
2085 CvXSUB (cv) = xsub; 3299 if (CvISXSUB (cb))
2086 GENSUB_ARG = arg; 3300 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2087 3301
2088 return newRV_noinc ((SV *)cv); 3302 if (!CvROOT (cb))
2089} 3303 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3304 }
3305 }
2090 3306
2091/*****************************************************************************/ 3307 Newz (0, coro, 1, struct coro);
3308 coro->args = newAV ();
3309 coro->flags = CF_NEW;
3310
3311 if (coro_first) coro_first->prev = coro;
3312 coro->next = coro_first;
3313 coro_first = coro;
3314
3315 coro->hv = hv = newHV ();
3316 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3317 mg->mg_flags |= MGf_DUP;
3318 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3319
3320 if (argc > 0)
3321 {
3322 av_extend (coro->args, argc + is_coro - 1);
3323
3324 if (is_coro)
3325 {
3326 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3327 cb = (SV *)cv_coro_run;
3328 }
3329
3330 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3331
3332 for (i = 1; i < argc; i++)
3333 av_push (coro->args, newSVsv (argv [i]));
3334 }
3335
3336 return coro_sv;
3337}
3338
3339#ifndef __cplusplus
3340ecb_cold XS(boot_Coro__State);
3341#endif
3342
3343#if CORO_JIT
3344
3345static void ecb_noinline ecb_cold
3346pushav_3uv (pTHX_ UV a, UV b, UV c)
3347{
3348 dSP;
3349 AV *av = newAV ();
3350
3351 av_store (av, 2, newSVuv (c));
3352 av_store (av, 1, newSVuv (b));
3353 av_store (av, 0, newSVuv (a));
3354
3355 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3356
3357 PUTBACK;
3358}
3359
3360static void ecb_noinline ecb_cold
3361jit_init (pTHX)
3362{
3363 dSP;
3364 SV *load, *save;
3365 char *map_base;
3366 char *load_ptr, *save_ptr;
3367 STRLEN load_len, save_len;
3368 int count;
3369
3370 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3371
3372 PUSHMARK (SP);
3373#define VARx(name,expr,type) pushav_3uv (aTHX_ (UV)&(expr), offsetof (perl_slots, name), sizeof (type));
3374# include "state.h"
3375#undef VARx
3376 count = call_pv ("Coro::State::_jit", G_ARRAY);
3377 SPAGAIN;
3378
3379 save = POPs; save_ptr = SvPVbyte (save, save_len);
3380 load = POPs; load_ptr = SvPVbyte (load, load_len);
3381
3382 map_base = mmap (0, load_len + save_len + 16, PROT_EXEC | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3383
3384 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3385
3386 load_perl_slots = (load_save_perl_slots_type)map_base;
3387 memcpy (map_base, load_ptr, load_len);
3388
3389 map_base += (load_len + 15) & ~15;
3390
3391 save_perl_slots = (load_save_perl_slots_type)map_base;
3392 memcpy (map_base, save_ptr, save_len);
3393
3394 PUTBACK;
3395 eval_pv ("undef &Coro::State::_jit", 1);
3396}
3397
3398#endif
2092 3399
2093MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 3400MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
2094 3401
2095PROTOTYPES: DISABLE 3402PROTOTYPES: DISABLE
2096 3403
2097BOOT: 3404BOOT:
2098{ 3405{
2099#ifdef USE_ITHREADS 3406#ifdef USE_ITHREADS
2100 MUTEX_INIT (&coro_lock);
2101# if CORO_PTHREAD 3407# if CORO_PTHREAD
2102 coro_thx = PERL_GET_CONTEXT; 3408 coro_thx = PERL_GET_CONTEXT;
2103# endif 3409# endif
2104#endif 3410#endif
2105 BOOT_PAGESIZE; 3411 BOOT_PAGESIZE;
2106 3412
3413 /* perl defines these to check for existance first, but why it doesn't */
3414 /* just create them one at init time is not clear to me, except for */
3415 /* programs trying to delete them, but... */
3416 /* anyway, we declare this as invalid and make sure they are initialised here */
3417 DEFSV;
3418 ERRSV;
3419
3420 cctx_current = cctx_new_empty ();
3421
2107 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 3422 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2108 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 3423 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2109 3424
2110 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get; 3425 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2111 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set; 3426 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
… …
2130 3445
2131 { 3446 {
2132 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf))); 3447 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2133 3448
2134 if (!PL_custom_op_names) PL_custom_op_names = newHV (); 3449 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2135 hv_store_ent (PL_custom_op_names, slf, 3450 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2136 newSVpv ("coro_slf", 0), 0);
2137 3451
2138 if (!PL_custom_op_descs) PL_custom_op_descs = newHV (); 3452 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2139 hv_store_ent (PL_custom_op_descs, slf, 3453 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2140 newSVpv ("coro schedule like function", 0), 0);
2141 } 3454 }
2142 3455
2143 coroapi.ver = CORO_API_VERSION; 3456 coroapi.ver = CORO_API_VERSION;
2144 coroapi.rev = CORO_API_REVISION; 3457 coroapi.rev = CORO_API_REVISION;
2145 3458
… …
2150 coroapi.prepare_nop = prepare_nop; 3463 coroapi.prepare_nop = prepare_nop;
2151 coroapi.prepare_schedule = prepare_schedule; 3464 coroapi.prepare_schedule = prepare_schedule;
2152 coroapi.prepare_cede = prepare_cede; 3465 coroapi.prepare_cede = prepare_cede;
2153 coroapi.prepare_cede_notself = prepare_cede_notself; 3466 coroapi.prepare_cede_notself = prepare_cede_notself;
2154 3467
2155 { 3468 time_init (aTHX);
2156 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2157 3469
2158 if (!svp) croak ("Time::HiRes is required");
2159 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2160
2161 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2162 }
2163
2164 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3470 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3471#if CORO_JIT
3472 PUTBACK;
3473 jit_init (aTHX);
3474 SPAGAIN;
3475#endif
2165} 3476}
2166 3477
2167SV * 3478SV *
2168new (char *klass, ...) 3479new (SV *klass, ...)
3480 ALIAS:
3481 Coro::new = 1
2169 CODE: 3482 CODE:
2170{ 3483 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
2171 struct coro *coro; 3484 OUTPUT:
2172 MAGIC *mg;
2173 HV *hv;
2174 int i;
2175
2176 Newz (0, coro, 1, struct coro);
2177 coro->args = newAV ();
2178 coro->flags = CF_NEW;
2179
2180 if (coro_first) coro_first->prev = coro;
2181 coro->next = coro_first;
2182 coro_first = coro;
2183
2184 coro->hv = hv = newHV ();
2185 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2186 mg->mg_flags |= MGf_DUP;
2187 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2188
2189 av_extend (coro->args, items - 1);
2190 for (i = 1; i < items; i++)
2191 av_push (coro->args, newSVsv (ST (i)));
2192}
2193 OUTPUT:
2194 RETVAL 3485 RETVAL
2195
2196void
2197_set_stacklevel (...)
2198 CODE:
2199 api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
2200 3486
2201void 3487void
2202transfer (...) 3488transfer (...)
2203 PROTOTYPE: $$ 3489 PROTOTYPE: $$
2204 CODE: 3490 CODE:
2205 api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items); 3491 CORO_EXECUTE_SLF_XS (slf_init_transfer);
2206
2207bool
2208_destroy (SV *coro_sv)
2209 CODE:
2210 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2211 OUTPUT:
2212 RETVAL
2213 3492
2214void 3493void
2215_exit (int code) 3494_exit (int code)
2216 PROTOTYPE: $ 3495 PROTOTYPE: $
2217 CODE: 3496 CODE:
2218 _exit (code); 3497 _exit (code);
3498
3499SV *
3500clone (Coro::State coro)
3501 CODE:
3502{
3503#if CORO_CLONE
3504 struct coro *ncoro = coro_clone (aTHX_ coro);
3505 MAGIC *mg;
3506 /* TODO: too much duplication */
3507 ncoro->hv = newHV ();
3508 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3509 mg->mg_flags |= MGf_DUP;
3510 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3511#else
3512 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3513#endif
3514}
3515 OUTPUT:
3516 RETVAL
2219 3517
2220int 3518int
2221cctx_stacksize (int new_stacksize = 0) 3519cctx_stacksize (int new_stacksize = 0)
2222 PROTOTYPE: ;$ 3520 PROTOTYPE: ;$
2223 CODE: 3521 CODE:
… …
2273 eval = 1 3571 eval = 1
2274 CODE: 3572 CODE:
2275{ 3573{
2276 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot)) 3574 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2277 { 3575 {
2278 struct coro temp; 3576 struct coro *current = SvSTATE_current;
3577 struct CoroSLF slf_save;
2279 3578
2280 if (!(coro->flags & CF_RUNNING)) 3579 if (current != coro)
2281 { 3580 {
2282 PUTBACK; 3581 PUTBACK;
2283 save_perl (aTHX_ &temp); 3582 save_perl (aTHX_ current);
2284 load_perl (aTHX_ coro); 3583 load_perl (aTHX_ coro);
3584 /* the coro is most likely in an active SLF call.
3585 * while not strictly required (the code we execute is
3586 * not allowed to call any SLF functions), it's cleaner
3587 * to reinitialise the slf_frame and restore it later.
3588 * This might one day allow us to actually do SLF calls
3589 * from code executed here.
3590 */
3591 slf_save = slf_frame;
3592 slf_frame.prepare = 0;
3593 SPAGAIN;
2285 } 3594 }
2286 3595
2287 {
2288 dSP;
2289 ENTER;
2290 SAVETMPS;
2291 PUTBACK;
2292 PUSHSTACK; 3596 PUSHSTACK;
3597
2293 PUSHMARK (SP); 3598 PUSHMARK (SP);
3599 PUTBACK;
2294 3600
2295 if (ix) 3601 if (ix)
2296 eval_sv (coderef, 0); 3602 eval_sv (coderef, 0);
2297 else 3603 else
2298 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3604 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2299 3605
2300 POPSTACK; 3606 POPSTACK;
2301 SPAGAIN; 3607 SPAGAIN;
2302 FREETMPS;
2303 LEAVE;
2304 PUTBACK;
2305 }
2306 3608
2307 if (!(coro->flags & CF_RUNNING)) 3609 if (current != coro)
2308 { 3610 {
3611 PUTBACK;
3612 slf_frame = slf_save;
2309 save_perl (aTHX_ coro); 3613 save_perl (aTHX_ coro);
2310 load_perl (aTHX_ &temp); 3614 load_perl (aTHX_ current);
2311 SPAGAIN; 3615 SPAGAIN;
2312 } 3616 }
2313 } 3617 }
2314} 3618}
2315 3619
… …
2318 PROTOTYPE: $ 3622 PROTOTYPE: $
2319 ALIAS: 3623 ALIAS:
2320 is_ready = CF_READY 3624 is_ready = CF_READY
2321 is_running = CF_RUNNING 3625 is_running = CF_RUNNING
2322 is_new = CF_NEW 3626 is_new = CF_NEW
2323 is_destroyed = CF_DESTROYED 3627 is_destroyed = CF_ZOMBIE
3628 is_zombie = CF_ZOMBIE
3629 is_suspended = CF_SUSPENDED
2324 CODE: 3630 CODE:
2325 RETVAL = boolSV (coro->flags & ix); 3631 RETVAL = boolSV (coro->flags & ix);
2326 OUTPUT: 3632 OUTPUT:
2327 RETVAL 3633 RETVAL
2328 3634
2329void 3635void
2330throw (Coro::State self, SV *throw = &PL_sv_undef) 3636throw (Coro::State self, SV *exception = &PL_sv_undef)
2331 PROTOTYPE: $;$ 3637 PROTOTYPE: $;$
2332 CODE: 3638 CODE:
3639{
3640 struct coro *current = SvSTATE_current;
3641 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
2333 SvREFCNT_dec (self->throw); 3642 SvREFCNT_dec (*exceptionp);
2334 self->throw = SvOK (throw) ? newSVsv (throw) : 0; 3643 SvGETMAGIC (exception);
3644 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3645}
2335 3646
2336void 3647void
2337api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3648api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2338 PROTOTYPE: $;$ 3649 PROTOTYPE: $;$
2339 C_ARGS: aTHX_ coro, flags 3650 C_ARGS: aTHX_ coro, flags
2340 3651
2341SV * 3652SV *
2342has_cctx (Coro::State coro) 3653has_cctx (Coro::State coro)
2343 PROTOTYPE: $ 3654 PROTOTYPE: $
2344 CODE: 3655 CODE:
2345 RETVAL = boolSV (!!coro->cctx); 3656 /* maybe manage the running flag differently */
3657 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
2346 OUTPUT: 3658 OUTPUT:
2347 RETVAL 3659 RETVAL
2348 3660
2349int 3661int
2350is_traced (Coro::State coro) 3662is_traced (Coro::State coro)
… …
2370 3682
2371void 3683void
2372force_cctx () 3684force_cctx ()
2373 PROTOTYPE: 3685 PROTOTYPE:
2374 CODE: 3686 CODE:
2375 struct coro *coro = SvSTATE (coro_current);
2376 coro->cctx->idle_sp = 0; 3687 cctx_current->idle_sp = 0;
2377 3688
2378void 3689void
2379swap_defsv (Coro::State self) 3690swap_defsv (Coro::State self)
2380 PROTOTYPE: $ 3691 PROTOTYPE: $
2381 ALIAS: 3692 ALIAS:
… …
2389 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv; 3700 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2390 3701
2391 SV *tmp = *src; *src = *dst; *dst = tmp; 3702 SV *tmp = *src; *src = *dst; *dst = tmp;
2392 } 3703 }
2393 3704
3705void
3706cancel (Coro::State self)
3707 CODE:
3708 coro_state_destroy (aTHX_ self);
3709
3710SV *
3711enable_times (int enabled = enable_times)
3712 CODE:
3713{
3714 RETVAL = boolSV (enable_times);
3715
3716 if (enabled != enable_times)
3717 {
3718 enable_times = enabled;
3719
3720 coro_times_update ();
3721 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3722 }
3723}
3724 OUTPUT:
3725 RETVAL
3726
3727void
3728times (Coro::State self)
3729 PPCODE:
3730{
3731 struct coro *current = SvSTATE (coro_current);
3732
3733 if (ecb_expect_false (current == self))
3734 {
3735 coro_times_update ();
3736 coro_times_add (SvSTATE (coro_current));
3737 }
3738
3739 EXTEND (SP, 2);
3740 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3741 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3742
3743 if (ecb_expect_false (current == self))
3744 coro_times_sub (SvSTATE (coro_current));
3745}
3746
3747void
3748swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3749 CODE:
3750{
3751 struct coro *current = SvSTATE_current;
3752
3753 if (current == coro)
3754 SWAP_SVS (current);
3755
3756 if (!coro->swap_sv)
3757 coro->swap_sv = newAV ();
3758
3759 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3760 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3761
3762 if (current == coro)
3763 SWAP_SVS (current);
3764}
3765
3766
2394MODULE = Coro::State PACKAGE = Coro 3767MODULE = Coro::State PACKAGE = Coro
2395 3768
2396BOOT: 3769BOOT:
2397{ 3770{
2398 int i;
2399
2400 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2401 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE); 3771 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2402 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); 3772 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2403 3773 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
2404 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE); 3774 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
2405 SvREADONLY_on (coro_current); 3775 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3776 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3777 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3778 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
2406 3779
3780 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3781 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3782 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3783 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3784
2407 coro_stash = gv_stashpv ("Coro", TRUE); 3785 coro_stash = gv_stashpv ("Coro", TRUE);
2408 3786
2409 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3787 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
2410 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3788 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
2411 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3789 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
2412 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3790 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
2413 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3791 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
2414 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3792 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
2415
2416 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2417 coro_ready[i] = newAV ();
2418 3793
2419 { 3794 {
2420 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE); 3795 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2421 3796
2422 coroapi.schedule = api_schedule; 3797 coroapi.schedule = api_schedule;
3798 coroapi.schedule_to = api_schedule_to;
2423 coroapi.cede = api_cede; 3799 coroapi.cede = api_cede;
2424 coroapi.cede_notself = api_cede_notself; 3800 coroapi.cede_notself = api_cede_notself;
2425 coroapi.ready = api_ready; 3801 coroapi.ready = api_ready;
2426 coroapi.is_ready = api_is_ready; 3802 coroapi.is_ready = api_is_ready;
2427 coroapi.nready = coro_nready; 3803 coroapi.nready = coro_nready;
2428 coroapi.current = coro_current; 3804 coroapi.current = coro_current;
2429 3805
2430 GCoroAPI = &coroapi; 3806 /*GCoroAPI = &coroapi;*/
2431 sv_setiv (sv, (IV)&coroapi); 3807 sv_setiv (sv, (IV)&coroapi);
2432 SvREADONLY_on (sv); 3808 SvREADONLY_on (sv);
2433 } 3809 }
2434} 3810}
2435 3811
3812SV *
3813async (...)
3814 PROTOTYPE: &@
3815 CODE:
3816 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3817 api_ready (aTHX_ RETVAL);
3818 OUTPUT:
3819 RETVAL
3820
3821void
3822_destroy (Coro::State coro)
3823 CODE:
3824 /* used by the manager thread */
3825 coro_state_destroy (aTHX_ coro);
3826
3827void
3828on_destroy (Coro::State coro, SV *cb)
3829 CODE:
3830 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3831
3832void
3833join (...)
3834 CODE:
3835 CORO_EXECUTE_SLF_XS (slf_init_join);
3836
3837void
3838terminate (...)
3839 CODE:
3840 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3841
3842void
3843cancel (...)
3844 CODE:
3845 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3846
3847int
3848safe_cancel (Coro::State self, ...)
3849 C_ARGS: aTHX_ self, &ST (1), items - 1
3850
2436void 3851void
2437schedule (...) 3852schedule (...)
2438 CODE: 3853 CODE:
2439 api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), 0); 3854 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3855
3856void
3857schedule_to (...)
3858 CODE:
3859 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3860
3861void
3862cede_to (...)
3863 CODE:
3864 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
2440 3865
2441void 3866void
2442cede (...) 3867cede (...)
2443 CODE: 3868 CODE:
2444 api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), 0); 3869 CORO_EXECUTE_SLF_XS (slf_init_cede);
2445 3870
2446void 3871void
2447cede_notself (...) 3872cede_notself (...)
2448 CODE: 3873 CODE:
2449 api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), 0); 3874 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2450 3875
2451void 3876void
2452_set_current (SV *current) 3877_set_current (SV *current)
2453 PROTOTYPE: $ 3878 PROTOTYPE: $
2454 CODE: 3879 CODE:
… …
2458void 3883void
2459_set_readyhook (SV *hook) 3884_set_readyhook (SV *hook)
2460 PROTOTYPE: $ 3885 PROTOTYPE: $
2461 CODE: 3886 CODE:
2462 SvREFCNT_dec (coro_readyhook); 3887 SvREFCNT_dec (coro_readyhook);
3888 SvGETMAGIC (hook);
3889 if (SvOK (hook))
3890 {
2463 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0; 3891 coro_readyhook = newSVsv (hook);
3892 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3893 }
3894 else
3895 {
3896 coro_readyhook = 0;
3897 CORO_READYHOOK = 0;
3898 }
2464 3899
2465int 3900int
2466prio (Coro::State coro, int newprio = 0) 3901prio (Coro::State coro, int newprio = 0)
2467 PROTOTYPE: $;$ 3902 PROTOTYPE: $;$
2468 ALIAS: 3903 ALIAS:
… …
2474 if (items > 1) 3909 if (items > 1)
2475 { 3910 {
2476 if (ix) 3911 if (ix)
2477 newprio = coro->prio - newprio; 3912 newprio = coro->prio - newprio;
2478 3913
2479 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3914 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
2480 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3915 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
2481 3916
2482 coro->prio = newprio; 3917 coro->prio = newprio;
2483 } 3918 }
2484} 3919}
2485 OUTPUT: 3920 OUTPUT:
… …
2499 CODE: 3934 CODE:
2500 RETVAL = coro_nready; 3935 RETVAL = coro_nready;
2501 OUTPUT: 3936 OUTPUT:
2502 RETVAL 3937 RETVAL
2503 3938
2504# for async_pool speedup
2505void 3939void
2506_pool_1 (SV *cb) 3940suspend (Coro::State self)
3941 PROTOTYPE: $
2507 CODE: 3942 CODE:
2508{ 3943 self->flags |= CF_SUSPENDED;
2509 struct coro *coro = SvSTATE (coro_current);
2510 HV *hv = (HV *)SvRV (coro_current);
2511 AV *defav = GvAV (PL_defgv);
2512 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2513 AV *invoke_av;
2514 int i, len;
2515 3944
2516 if (!invoke) 3945void
3946resume (Coro::State self)
3947 PROTOTYPE: $
3948 CODE:
3949 self->flags &= ~CF_SUSPENDED;
3950
3951void
3952_pool_handler (...)
3953 CODE:
3954 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3955
3956void
3957async_pool (SV *cv, ...)
3958 PROTOTYPE: &@
3959 PPCODE:
3960{
3961 HV *hv = (HV *)av_pop (av_async_pool);
3962 AV *av = newAV ();
3963 SV *cb = ST (0);
3964 int i;
3965
3966 av_extend (av, items - 2);
3967 for (i = 1; i < items; ++i)
3968 av_push (av, SvREFCNT_inc_NN (ST (i)));
3969
3970 if ((SV *)hv == &PL_sv_undef)
2517 { 3971 {
2518 SV *old = PL_diehook; 3972 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
2519 PL_diehook = 0; 3973 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
2520 SvREFCNT_dec (old); 3974 SvREFCNT_dec (sv);
2521 croak ("\3async_pool terminate\2\n");
2522 } 3975 }
2523 3976
2524 SvREFCNT_dec (coro->saved_deffh);
2525 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2526
2527 hv_store (hv, "desc", sizeof ("desc") - 1,
2528 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2529
2530 invoke_av = (AV *)SvRV (invoke);
2531 len = av_len (invoke_av);
2532
2533 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2534
2535 if (len > 0)
2536 { 3977 {
2537 av_fill (defav, len - 1); 3978 struct coro *coro = SvSTATE_hv (hv);
2538 for (i = 0; i < len; ++i) 3979
2539 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1])); 3980 assert (!coro->invoke_cb);
3981 assert (!coro->invoke_av);
3982 coro->invoke_cb = SvREFCNT_inc (cb);
3983 coro->invoke_av = av;
2540 } 3984 }
3985
3986 api_ready (aTHX_ (SV *)hv);
3987
3988 if (GIMME_V != G_VOID)
3989 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3990 else
3991 SvREFCNT_dec (hv);
2541} 3992}
3993
3994SV *
3995rouse_cb ()
3996 PROTOTYPE:
3997 CODE:
3998 RETVAL = coro_new_rouse_cb (aTHX);
3999 OUTPUT:
4000 RETVAL
2542 4001
2543void 4002void
2544_pool_2 (SV *cb) 4003rouse_wait (...)
4004 PROTOTYPE: ;$
4005 PPCODE:
4006 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4007
4008void
4009on_enter (SV *block)
4010 ALIAS:
4011 on_leave = 1
4012 PROTOTYPE: &
2545 CODE: 4013 CODE:
2546{ 4014{
2547 struct coro *coro = SvSTATE (coro_current); 4015 struct coro *coro = SvSTATE_current;
4016 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
2548 4017
2549 sv_setsv (cb, &PL_sv_undef); 4018 block = s_get_cv_croak (block);
2550 4019
2551 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh; 4020 if (!*avp)
2552 coro->saved_deffh = 0;
2553
2554 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2555 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2556 {
2557 SV *old = PL_diehook;
2558 PL_diehook = 0;
2559 SvREFCNT_dec (old);
2560 croak ("\3async_pool terminate\2\n");
2561 }
2562
2563 av_clear (GvAV (PL_defgv));
2564 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2565 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2566
2567 coro->prio = 0;
2568
2569 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2570 api_trace (aTHX_ coro_current, 0);
2571
2572 av_push (av_async_pool, newSVsv (coro_current));
2573}
2574
2575
2576MODULE = Coro::State PACKAGE = Coro::AIO
2577
2578void
2579_get_state (SV *self)
2580 PROTOTYPE: $
2581 PPCODE:
2582{
2583 AV *defav = GvAV (PL_defgv);
2584 AV *av = newAV (); 4021 *avp = newAV ();
2585 int i;
2586 SV *data_sv = newSV (sizeof (struct io_state));
2587 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2588 SvCUR_set (data_sv, sizeof (struct io_state));
2589 SvPOK_only (data_sv);
2590 4022
2591 data->errorno = errno; 4023 av_push (*avp, SvREFCNT_inc (block));
2592 data->laststype = PL_laststype;
2593 data->laststatval = PL_laststatval;
2594 data->statcache = PL_statcache;
2595 4024
2596 av_extend (av, AvFILLp (defav) + 1 + 1); 4025 if (!ix)
4026 on_enterleave_call (aTHX_ block);
2597 4027
2598 for (i = 0; i <= AvFILLp (defav); ++i) 4028 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
2599 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i])); 4029 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
2600 4030 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
2601 av_push (av, data_sv);
2602
2603 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2604
2605 api_ready (aTHX_ self);
2606}
2607
2608void
2609_set_state (SV *state)
2610 PROTOTYPE: $
2611 PPCODE:
2612{
2613 AV *av = (AV *)SvRV (state);
2614 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2615 int i;
2616
2617 errno = data->errorno;
2618 PL_laststype = data->laststype;
2619 PL_laststatval = data->laststatval;
2620 PL_statcache = data->statcache;
2621
2622 EXTEND (SP, AvFILLp (av));
2623 for (i = 0; i < AvFILLp (av); ++i)
2624 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2625}
2626
2627
2628MODULE = Coro::State PACKAGE = Coro::AnyEvent
2629
2630BOOT:
2631 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2632
2633void
2634_schedule (...)
2635 CODE:
2636{
2637 static int incede;
2638
2639 api_cede_notself (aTHX);
2640
2641 ++incede;
2642 while (coro_nready >= incede && api_cede (aTHX))
2643 ;
2644
2645 sv_setsv (sv_activity, &PL_sv_undef);
2646 if (coro_nready >= incede)
2647 {
2648 PUSHMARK (SP);
2649 PUTBACK;
2650 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2651 SPAGAIN;
2652 }
2653
2654 --incede;
2655} 4031}
2656 4032
2657 4033
2658MODULE = Coro::State PACKAGE = PerlIO::cede 4034MODULE = Coro::State PACKAGE = PerlIO::cede
2659 4035
2660BOOT: 4036BOOT:
2661 PerlIO_define_layer (aTHX_ &PerlIO_cede); 4037 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2662 4038
4039
2663MODULE = Coro::State PACKAGE = Coro::Semaphore 4040MODULE = Coro::State PACKAGE = Coro::Semaphore
2664 4041
2665SV * 4042SV *
2666new (SV *klass, SV *count_ = 0) 4043new (SV *klass, SV *count = 0)
2667 CODE: 4044 CODE:
2668{ 4045{
2669 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */ 4046 int semcnt = 1;
2670 AV *av = newAV (); 4047
2671 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1)); 4048 if (count)
2672 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv))); 4049 {
4050 SvGETMAGIC (count);
4051
4052 if (SvOK (count))
4053 semcnt = SvIV (count);
4054 }
4055
4056 RETVAL = sv_bless (
4057 coro_waitarray_new (aTHX_ semcnt),
4058 GvSTASH (CvGV (cv))
4059 );
2673} 4060}
4061 OUTPUT:
4062 RETVAL
4063
4064# helper for Coro::Channel and others
4065SV *
4066_alloc (int count)
4067 CODE:
4068 RETVAL = coro_waitarray_new (aTHX_ count);
2674 OUTPUT: 4069 OUTPUT:
2675 RETVAL 4070 RETVAL
2676 4071
2677SV * 4072SV *
2678count (SV *self) 4073count (SV *self)
… …
2684void 4079void
2685up (SV *self, int adjust = 1) 4080up (SV *self, int adjust = 1)
2686 ALIAS: 4081 ALIAS:
2687 adjust = 1 4082 adjust = 1
2688 CODE: 4083 CODE:
2689 coro_semaphore_adjust ((AV *)SvRV (self), ix ? adjust : 1); 4084 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2690 4085
2691void 4086void
2692down (SV *self) 4087down (...)
2693 CODE: 4088 CODE:
2694 api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), 1); 4089 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4090
4091void
4092wait (...)
4093 CODE:
4094 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
2695 4095
2696void 4096void
2697try (SV *self) 4097try (SV *self)
2698 PPCODE: 4098 PPCODE:
2699{ 4099{
… …
2711 XSRETURN_NO; 4111 XSRETURN_NO;
2712} 4112}
2713 4113
2714void 4114void
2715waiters (SV *self) 4115waiters (SV *self)
2716 CODE: 4116 PPCODE:
2717{ 4117{
2718 AV *av = (AV *)SvRV (self); 4118 AV *av = (AV *)SvRV (self);
4119 int wcount = AvFILLp (av) + 1 - 1;
2719 4120
2720 if (GIMME_V == G_SCALAR) 4121 if (GIMME_V == G_SCALAR)
2721 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0]))); 4122 XPUSHs (sv_2mortal (newSViv (wcount)));
2722 else 4123 else
2723 { 4124 {
2724 int i; 4125 int i;
2725 EXTEND (SP, AvFILLp (av) + 1 - 1); 4126 EXTEND (SP, wcount);
2726 for (i = 1; i <= AvFILLp (av); ++i) 4127 for (i = 1; i <= wcount; ++i)
2727 PUSHs (newSVsv (AvARRAY (av)[i])); 4128 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
2728 } 4129 }
2729} 4130}
2730 4131
4132MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4133
4134void
4135_may_delete (SV *sem, int count, int extra_refs)
4136 PPCODE:
4137{
4138 AV *av = (AV *)SvRV (sem);
4139
4140 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4141 && AvFILLp (av) == 0 /* no waiters, just count */
4142 && SvIV (AvARRAY (av)[0]) == count)
4143 XSRETURN_YES;
4144
4145 XSRETURN_NO;
4146}
4147
4148MODULE = Coro::State PACKAGE = Coro::Signal
4149
4150SV *
4151new (SV *klass)
4152 CODE:
4153 RETVAL = sv_bless (
4154 coro_waitarray_new (aTHX_ 0),
4155 GvSTASH (CvGV (cv))
4156 );
4157 OUTPUT:
4158 RETVAL
4159
4160void
4161wait (...)
4162 CODE:
4163 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4164
4165void
4166broadcast (SV *self)
4167 CODE:
4168{
4169 AV *av = (AV *)SvRV (self);
4170 coro_signal_wake (aTHX_ av, AvFILLp (av));
4171}
4172
4173void
4174send (SV *self)
4175 CODE:
4176{
4177 AV *av = (AV *)SvRV (self);
4178
4179 if (AvFILLp (av))
4180 coro_signal_wake (aTHX_ av, 1);
4181 else
4182 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4183}
4184
4185IV
4186awaited (SV *self)
4187 CODE:
4188 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4189 OUTPUT:
4190 RETVAL
4191
4192
4193MODULE = Coro::State PACKAGE = Coro::AnyEvent
4194
4195BOOT:
4196 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4197
4198void
4199_schedule (...)
4200 CODE:
4201{
4202 static int incede;
4203
4204 api_cede_notself (aTHX);
4205
4206 ++incede;
4207 while (coro_nready >= incede && api_cede (aTHX))
4208 ;
4209
4210 sv_setsv (sv_activity, &PL_sv_undef);
4211 if (coro_nready >= incede)
4212 {
4213 PUSHMARK (SP);
4214 PUTBACK;
4215 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4216 }
4217
4218 --incede;
4219}
4220
4221
4222MODULE = Coro::State PACKAGE = Coro::AIO
4223
4224void
4225_register (char *target, char *proto, SV *req)
4226 CODE:
4227{
4228 SV *req_cv = s_get_cv_croak (req);
4229 /* newXSproto doesn't return the CV on 5.8 */
4230 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4231 sv_setpv ((SV *)slf_cv, proto);
4232 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4233}
4234
4235MODULE = Coro::State PACKAGE = Coro::Select
4236
4237void
4238patch_pp_sselect ()
4239 CODE:
4240 if (!coro_old_pp_sselect)
4241 {
4242 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4243 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4244 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4245 }
4246
4247void
4248unpatch_pp_sselect ()
4249 CODE:
4250 if (coro_old_pp_sselect)
4251 {
4252 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4253 coro_old_pp_sselect = 0;
4254 }
4255

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