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Comparing Coro/Coro/State.xs (file contents):
Revision 1.147 by root, Mon Mar 19 15:50:48 2007 UTC vs.
Revision 1.425 by root, Wed Dec 5 00:14:22 2012 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
9#define PERL_EXT
4 10
5#include "EXTERN.h" 11#include "EXTERN.h"
6#include "perl.h" 12#include "perl.h"
7#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
8 15
9#include "patchlevel.h" 16#include "schmorp.h"
10 17
18#define ECB_NO_THREADS 1
19#include "ecb.h"
20
21#include <stddef.h>
11#include <stdio.h> 22#include <stdio.h>
12#include <errno.h> 23#include <errno.h>
13#include <assert.h> 24#include <assert.h>
14 25
26#ifndef SVs_PADSTALE
27# define SVs_PADSTALE 0
28#endif
29
30#ifdef PadARRAY
31# define NEWPADAPI
32# define newPADLIST(var) (Newz (0, var, 1, PADLIST), Newx (PadlistARRAY (var), 2, PAD *))
33#else
34typedef AV PADNAMELIST;
35# if !PERL_VERSION_ATLEAST(5,8,0)
36typedef AV PADLIST;
37typedef AV PAD;
38# endif
39# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
40# define PadlistMAX(pl) AvFILLp (pl)
41# define PadlistNAMES(pl) (*PadlistARRAY (pl))
42# define PadARRAY AvARRAY
43# define PadMAX AvFILLp
44# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
45#endif
46
47#if defined(_WIN32)
48# undef HAS_GETTIMEOFDAY
49# undef setjmp
50# undef longjmp
51# undef _exit
52# define setjmp _setjmp /* deep magic */
53#else
54# include <inttypes.h> /* most portable stdint.h */
55#endif
56
15#ifdef HAVE_MMAP 57#if HAVE_MMAP
16# include <unistd.h> 58# include <unistd.h>
17# include <sys/mman.h> 59# include <sys/mman.h>
18# ifndef MAP_ANONYMOUS 60# ifndef MAP_ANONYMOUS
19# ifdef MAP_ANON 61# ifdef MAP_ANON
20# define MAP_ANONYMOUS MAP_ANON 62# define MAP_ANONYMOUS MAP_ANON
… …
35# define BOOT_PAGESIZE (void)0 77# define BOOT_PAGESIZE (void)0
36#endif 78#endif
37 79
38#if CORO_USE_VALGRIND 80#if CORO_USE_VALGRIND
39# include <valgrind/valgrind.h> 81# include <valgrind/valgrind.h>
40# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
41#else
42# define REGISTER_STACK(cctx,start,end)
43#endif 82#endif
44 83
45/* the maximum number of idle cctx that will be pooled */ 84/* the maximum number of idle cctx that will be pooled */
46#define MAX_IDLE_CCTX 8 85static int cctx_max_idle = 4;
47 86
48#define PERL_VERSION_ATLEAST(a,b,c) \ 87#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
49 (PERL_REVISION > (a) \ 88# define HAS_SCOPESTACK_NAME 1
50 || (PERL_REVISION == (a) \
51 && (PERL_VERSION > (b) \
52 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
53
54#if !PERL_VERSION_ATLEAST (5,6,0)
55# ifndef PL_ppaddr
56# define PL_ppaddr ppaddr
57# endif
58# ifndef call_sv
59# define call_sv perl_call_sv
60# endif
61# ifndef get_sv
62# define get_sv perl_get_sv
63# endif
64# ifndef get_cv
65# define get_cv perl_get_cv
66# endif
67# ifndef IS_PADGV
68# define IS_PADGV(v) 0
69# endif
70# ifndef IS_PADCONST
71# define IS_PADCONST(v) 0
72# endif
73#endif
74
75/* 5.8.7 */
76#ifndef SvRV_set
77# define SvRV_set(s,v) SvRV(s) = (v)
78#endif 89#endif
79 90
80#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 91#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
81# undef CORO_STACKGUARD 92# undef CORO_STACKGUARD
82#endif 93#endif
… …
88/* prefer perl internal functions over our own? */ 99/* prefer perl internal functions over our own? */
89#ifndef CORO_PREFER_PERL_FUNCTIONS 100#ifndef CORO_PREFER_PERL_FUNCTIONS
90# define CORO_PREFER_PERL_FUNCTIONS 0 101# define CORO_PREFER_PERL_FUNCTIONS 0
91#endif 102#endif
92 103
93/* The next macro should declare a variable stacklevel that contains and approximation 104/* The next macros try to return the current stack pointer, in an as
94 * to the current C stack pointer. Its property is that it changes with each call 105 * portable way as possible. */
95 * and should be unique. */
96#define dSTACKLEVEL int stacklevel
97#define STACKLEVEL ((void *)&stacklevel)
98
99#define IN_DESTRUCT (PL_main_cv == Nullcv)
100
101#if __GNUC__ >= 3 106#if __GNUC__ >= 4
102# define attribute(x) __attribute__(x) 107# define dSTACKLEVEL int stacklevel_dummy
103# define BARRIER __asm__ __volatile__ ("" : : : "memory") 108# define STACKLEVEL __builtin_frame_address (0)
104#else 109#else
105# define attribute(x) 110# define dSTACKLEVEL volatile void *stacklevel
106# define BARRIER 111# define STACKLEVEL ((void *)&stacklevel)
107#endif 112#endif
108 113
109#define NOINLINE attribute ((noinline)) 114#define IN_DESTRUCT PL_dirty
110 115
111#include "CoroAPI.h" 116#include "CoroAPI.h"
117#define GCoroAPI (&coroapi) /* very sneaky */
112 118
113#ifdef USE_ITHREADS 119#ifdef USE_ITHREADS
114static perl_mutex coro_mutex; 120# if CORO_PTHREAD
115# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 121static void *coro_thx;
116# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
117#else
118# define LOCK (void)0
119# define UNLOCK (void)0
120#endif 122# endif
123#endif
121 124
122/* helper storage struct for Coro::AIO */ 125#ifdef __linux
123struct io_state 126# include <time.h> /* for timespec */
124{ 127# include <syscall.h> /* for SYS_* */
125 int errorno; 128# ifdef SYS_clock_gettime
126 I32 laststype; 129# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
127 int laststatval; 130# define CORO_CLOCK_MONOTONIC 1
128 Stat_t statcache; 131# define CORO_CLOCK_THREAD_CPUTIME_ID 3
129}; 132# endif
133#endif
130 134
135static double (*nvtime)(); /* so why doesn't it take void? */
136static void (*u2time)(pTHX_ UV ret[2]);
137
138/* we hijack an hopefully unused CV flag for our purposes */
139#define CVf_SLF 0x4000
140static OP *pp_slf (pTHX);
141static void slf_destroy (pTHX_ struct coro *coro);
142
143static U32 cctx_gen;
131static size_t coro_stacksize = CORO_STACKSIZE; 144static size_t cctx_stacksize = CORO_STACKSIZE;
132static struct CoroAPI coroapi; 145static struct CoroAPI coroapi;
133static AV *main_mainstack; /* used to differentiate between $main and others */ 146static AV *main_mainstack; /* used to differentiate between $main and others */
147static JMPENV *main_top_env;
134static HV *coro_state_stash, *coro_stash; 148static HV *coro_state_stash, *coro_stash;
135static SV *coro_mortal; /* will be freed after next transfer */ 149static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
150
151static AV *av_destroy; /* destruction queue */
152static SV *sv_manager; /* the manager coro */
153static SV *sv_idle; /* $Coro::idle */
154
155static GV *irsgv; /* $/ */
156static GV *stdoutgv; /* *STDOUT */
157static SV *rv_diehook;
158static SV *rv_warnhook;
159static HV *hv_sig; /* %SIG */
160
161/* async_pool helper stuff */
162static SV *sv_pool_rss;
163static SV *sv_pool_size;
164static SV *sv_async_pool_idle; /* description string */
165static AV *av_async_pool; /* idle pool */
166static SV *sv_Coro; /* class string */
167static CV *cv_pool_handler;
168
169/* Coro::AnyEvent */
170static SV *sv_activity;
171
172/* enable processtime/realtime profiling */
173static char enable_times;
174typedef U32 coro_ts[2];
175static coro_ts time_real, time_cpu;
176static char times_valid;
136 177
137static struct coro_cctx *cctx_first; 178static struct coro_cctx *cctx_first;
138static int cctx_count, cctx_idle; 179static int cctx_count, cctx_idle;
139 180
181enum
182{
183 CC_MAPPED = 0x01,
184 CC_NOREUSE = 0x02, /* throw this away after tracing */
185 CC_TRACE = 0x04,
186 CC_TRACE_SUB = 0x08, /* trace sub calls */
187 CC_TRACE_LINE = 0x10, /* trace each statement */
188 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
189};
190
140/* this is a structure representing a c-level coroutine */ 191/* this is a structure representing a c-level coroutine */
141typedef struct coro_cctx { 192typedef struct coro_cctx
193{
142 struct coro_cctx *next; 194 struct coro_cctx *next;
143 195
144 /* the stack */ 196 /* the stack */
145 void *sptr; 197 void *sptr;
146 size_t ssize; 198 size_t ssize;
147 199
148 /* cpu state */ 200 /* cpu state */
149 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 201 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
202#ifndef NDEBUG
150 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 203 JMPENV *idle_te; /* same as idle_sp, but for top_env */
204#endif
151 JMPENV *top_env; 205 JMPENV *top_env;
152 coro_context cctx; 206 coro_context cctx;
153 207
208 U32 gen;
154#if CORO_USE_VALGRIND 209#if CORO_USE_VALGRIND
155 int valgrind_id; 210 int valgrind_id;
156#endif 211#endif
157 char inuse, mapped; 212 unsigned char flags;
158} coro_cctx; 213} coro_cctx;
159 214
215static coro_cctx *cctx_current; /* the currently running cctx */
216
217/*****************************************************************************/
218
219static MGVTBL coro_state_vtbl;
220
160enum { 221enum
222{
161 CF_RUNNING = 0x0001, /* coroutine is running */ 223 CF_RUNNING = 0x0001, /* coroutine is running */
162 CF_READY = 0x0002, /* coroutine is ready */ 224 CF_READY = 0x0002, /* coroutine is ready */
163 CF_NEW = 0x0004, /* has never been switched to */ 225 CF_NEW = 0x0004, /* has never been switched to */
164 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 226 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
227 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
228 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
165}; 229};
166 230
231/* the structure where most of the perl state is stored, overlaid on the cxstack */
232typedef struct
233{
234 #define VARx(name,expr,type) type name;
235 #include "state.h"
236} perl_slots;
237
238/* how many context stack entries do we need for perl_slots */
239#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
240
167/* this is a structure representing a perl-level coroutine */ 241/* this is a structure representing a perl-level coroutine */
168struct coro { 242struct coro
243{
169 /* the c coroutine allocated to this perl coroutine, if any */ 244 /* the C coroutine allocated to this perl coroutine, if any */
170 coro_cctx *cctx; 245 coro_cctx *cctx;
171 246
247 /* ready queue */
248 struct coro *next_ready;
249
250 /* state data */
251 struct CoroSLF slf_frame; /* saved slf frame */
252 AV *mainstack;
253 perl_slots *slot; /* basically the saved sp */
254
255 CV *startcv; /* the CV to execute */
172 /* data associated with this coroutine (initial args) */ 256 AV *args; /* data associated with this coroutine (initial args) */
173 AV *args;
174 int refcnt;
175 int save; /* CORO_SAVE flags */
176 int flags; /* CF_ flags */ 257 int flags; /* CF_ flags */
258 HV *hv; /* the perl hash associated with this coro, if any */
177 259
178 /* optionally saved, might be zero */ 260 /* statistics */
179 AV *defav; /* @_ */ 261 int usecount; /* number of transfers to this coro */
180 SV *defsv; /* $_ */
181 SV *errsv; /* $@ */
182 GV *deffh; /* default filehandle */
183 SV *irssv; /* $/ */
184 SV *irssv_sv; /* real $/ cache */
185
186#define VAR(name,type) type name;
187# include "state.h"
188#undef VAR
189 262
190 /* coro process data */ 263 /* coro process data */
191 int prio; 264 int prio;
265 SV *except; /* exception to be thrown */
266 SV *rouse_cb; /* last rouse callback */
267 AV *on_destroy; /* callbacks or coros to notify on destroy */
268 AV *status; /* the exit status list */
269
270 /* async_pool */
271 SV *saved_deffh;
272 SV *invoke_cb;
273 AV *invoke_av;
274
275 /* on_enter/on_leave */
276 AV *on_enter;
277 AV *on_leave;
278
279 /* swap_sv */
280 AV *swap_sv;
281
282 /* times */
283 coro_ts t_cpu, t_real;
284
285 /* linked list */
286 struct coro *next, *prev;
192}; 287};
193 288
194typedef struct coro *Coro__State; 289typedef struct coro *Coro__State;
195typedef struct coro *Coro__State_or_hashref; 290typedef struct coro *Coro__State_or_hashref;
196 291
292/* the following variables are effectively part of the perl context */
293/* and get copied between struct coro and these variables */
294/* the main reason we don't support windows process emulation */
295static struct CoroSLF slf_frame; /* the current slf frame */
296
197/** Coro ********************************************************************/ 297/** Coro ********************************************************************/
198 298
199#define PRIO_MAX 3 299#define CORO_PRIO_MAX 3
200#define PRIO_HIGH 1 300#define CORO_PRIO_HIGH 1
201#define PRIO_NORMAL 0 301#define CORO_PRIO_NORMAL 0
202#define PRIO_LOW -1 302#define CORO_PRIO_LOW -1
203#define PRIO_IDLE -3 303#define CORO_PRIO_IDLE -3
204#define PRIO_MIN -4 304#define CORO_PRIO_MIN -4
205 305
206/* for Coro.pm */ 306/* for Coro.pm */
207static SV *coro_current; 307static SV *coro_current;
208static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 308static SV *coro_readyhook;
209static int coro_nready; 309static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
310static CV *cv_coro_run;
311static struct coro *coro_first;
312#define coro_nready coroapi.nready
313
314/** JIT *********************************************************************/
315
316#if CORO_JIT
317 /* APPLE doesn't have HAVE_MMAP though */
318 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
319 #ifndef CORO_JIT_TYPE
320 #if __x86_64 && CORO_JIT_UNIXY
321 #define CORO_JIT_TYPE "amd64-unix"
322 #elif __i386 && CORO_JIT_UNIXY
323 #define CORO_JIT_TYPE "x86-unix"
324 #endif
325 #endif
326#endif
327
328#if !defined(CORO_JIT_TYPE) || !HAVE_MMAP
329 #undef CORO_JIT
330#endif
331
332#if CORO_JIT
333 typedef void (*load_save_perl_slots_type)(perl_slots *);
334 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
335#endif
336
337/** Coro::Select ************************************************************/
338
339static OP *(*coro_old_pp_sselect) (pTHX);
340static SV *coro_select_select;
341
342/* horrible hack, but if it works... */
343static OP *
344coro_pp_sselect (pTHX)
345{
346 dSP;
347 PUSHMARK (SP - 4); /* fake argument list */
348 XPUSHs (coro_select_select);
349 PUTBACK;
350
351 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
352 PL_op->op_flags |= OPf_STACKED;
353 PL_op->op_private = 0;
354 return PL_ppaddr [OP_ENTERSUB](aTHX);
355}
356
357/** time stuff **************************************************************/
358
359#ifdef HAS_GETTIMEOFDAY
360
361ecb_inline void
362coro_u2time (pTHX_ UV ret[2])
363{
364 struct timeval tv;
365 gettimeofday (&tv, 0);
366
367 ret [0] = tv.tv_sec;
368 ret [1] = tv.tv_usec;
369}
370
371ecb_inline double
372coro_nvtime (void)
373{
374 struct timeval tv;
375 gettimeofday (&tv, 0);
376
377 return tv.tv_sec + tv.tv_usec * 1e-6;
378}
379
380ecb_inline void
381time_init (pTHX)
382{
383 nvtime = coro_nvtime;
384 u2time = coro_u2time;
385}
386
387#else
388
389ecb_inline void
390time_init (pTHX)
391{
392 SV **svp;
393
394 require_pv ("Time/HiRes.pm");
395
396 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
397
398 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
399 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
400
401 nvtime = INT2PTR (double (*)(), SvIV (*svp));
402
403 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
404 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
405}
406
407#endif
210 408
211/** lowlevel stuff **********************************************************/ 409/** lowlevel stuff **********************************************************/
212 410
213static AV * 411static SV * ecb_noinline
412coro_get_sv (pTHX_ const char *name, int create)
413{
414#if PERL_VERSION_ATLEAST (5,10,0)
415 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
416 get_sv (name, create);
417#endif
418 return get_sv (name, create);
419}
420
421static AV * ecb_noinline
422coro_get_av (pTHX_ const char *name, int create)
423{
424#if PERL_VERSION_ATLEAST (5,10,0)
425 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
426 get_av (name, create);
427#endif
428 return get_av (name, create);
429}
430
431static HV * ecb_noinline
432coro_get_hv (pTHX_ const char *name, int create)
433{
434#if PERL_VERSION_ATLEAST (5,10,0)
435 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
436 get_hv (name, create);
437#endif
438 return get_hv (name, create);
439}
440
441ecb_inline void
442coro_times_update (void)
443{
444#ifdef coro_clock_gettime
445 struct timespec ts;
446
447 ts.tv_sec = ts.tv_nsec = 0;
448 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
449 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
450
451 ts.tv_sec = ts.tv_nsec = 0;
452 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
453 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
454#else
455 dTHX;
456 UV tv[2];
457
458 u2time (aTHX_ tv);
459 time_real [0] = tv [0];
460 time_real [1] = tv [1] * 1000;
461#endif
462}
463
464ecb_inline void
465coro_times_add (struct coro *c)
466{
467 c->t_real [1] += time_real [1];
468 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
469 c->t_real [0] += time_real [0];
470
471 c->t_cpu [1] += time_cpu [1];
472 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
473 c->t_cpu [0] += time_cpu [0];
474}
475
476ecb_inline void
477coro_times_sub (struct coro *c)
478{
479 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
480 c->t_real [1] -= time_real [1];
481 c->t_real [0] -= time_real [0];
482
483 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
484 c->t_cpu [1] -= time_cpu [1];
485 c->t_cpu [0] -= time_cpu [0];
486}
487
488/*****************************************************************************/
489/* magic glue */
490
491#define CORO_MAGIC_type_cv 26
492#define CORO_MAGIC_type_state PERL_MAGIC_ext
493
494#define CORO_MAGIC_NN(sv, type) \
495 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
496 ? SvMAGIC (sv) \
497 : mg_find (sv, type))
498
499#define CORO_MAGIC(sv, type) \
500 (ecb_expect_true (SvMAGIC (sv)) \
501 ? CORO_MAGIC_NN (sv, type) \
502 : 0)
503
504#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
505#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
506
507ecb_inline MAGIC *
508SvSTATEhv_p (pTHX_ SV *coro)
509{
510 MAGIC *mg;
511
512 if (ecb_expect_true (
513 SvTYPE (coro) == SVt_PVHV
514 && (mg = CORO_MAGIC_state (coro))
515 && mg->mg_virtual == &coro_state_vtbl
516 ))
517 return mg;
518
519 return 0;
520}
521
522ecb_inline struct coro *
523SvSTATE_ (pTHX_ SV *coro)
524{
525 MAGIC *mg;
526
527 if (SvROK (coro))
528 coro = SvRV (coro);
529
530 mg = SvSTATEhv_p (aTHX_ coro);
531 if (!mg)
532 croak ("Coro::State object required");
533
534 return (struct coro *)mg->mg_ptr;
535}
536
537#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
538
539/* faster than SvSTATE, but expects a coroutine hv */
540#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
541#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
542
543/*****************************************************************************/
544/* padlist management and caching */
545
546ecb_inline PADLIST *
214coro_clone_padlist (pTHX_ CV *cv) 547coro_derive_padlist (pTHX_ CV *cv)
215{ 548{
216 AV *padlist = CvPADLIST (cv); 549 PADLIST *padlist = CvPADLIST (cv);
217 AV *newpadlist, *newpad; 550 PADLIST *newpadlist;
551 PAD *newpad;
552 PADOFFSET const off = PadlistMAX (padlist) + 1;
218 553
219 newpadlist = newAV (); 554 newPADLIST(newpadlist);
555#if !PERL_VERSION_ATLEAST(5,15,3)
556 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
220 AvREAL_off (newpadlist); 557 AvREAL_off (newpadlist);
558#endif
221#if PERL_VERSION_ATLEAST (5,9,0) 559#if PERL_VERSION_ATLEAST (5,10,0)
222 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 560 Perl_pad_push (aTHX_ padlist, off);
223#else 561#else
224 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 562 Perl_pad_push (aTHX_ padlist, off, 1);
225#endif 563#endif
226 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 564 newpad = PadlistARRAY (padlist)[off];
227 --AvFILLp (padlist); 565 PadlistMAX (padlist) = off - 1;
228 566
229 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 567 /* Already extended to 2 elements by newPADLIST. */
230 av_store (newpadlist, 1, (SV *)newpad); 568 PadlistMAX (newpadlist) = 1;
569 PadlistNAMES (newpadlist) = (PADNAMELIST *)SvREFCNT_inc_NN (PadlistNAMES (padlist));
570 PadlistARRAY (newpadlist)[1] = newpad;
231 571
232 return newpadlist; 572 return newpadlist;
233} 573}
234 574
235static void 575ecb_inline void
236free_padlist (pTHX_ AV *padlist) 576free_padlist (pTHX_ PADLIST *padlist)
237{ 577{
238 /* may be during global destruction */ 578 /* may be during global destruction */
239 if (SvREFCNT (padlist)) 579 if (!IN_DESTRUCT)
240 { 580 {
241 I32 i = AvFILLp (padlist); 581 I32 i = PadlistMAX (padlist);
242 while (i >= 0) 582
583 while (i > 0) /* special-case index 0 */
243 { 584 {
244 SV **svp = av_fetch (padlist, i--, FALSE); 585 /* we try to be extra-careful here */
245 if (svp) 586 PAD *pad = PadlistARRAY (padlist)[i--];
246 { 587 I32 j = PadMAX (pad);
247 SV *sv;
248 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
249 SvREFCNT_dec (sv);
250 588
589 while (j >= 0)
590 SvREFCNT_dec (PadARRAY (pad)[j--]);
591
592 PadMAX (pad) = -1;
251 SvREFCNT_dec (*svp); 593 SvREFCNT_dec (pad);
252 }
253 } 594 }
254 595
596 SvREFCNT_dec (PadlistNAMES (padlist));
597
598#ifdef NEWPADAPI
599 Safefree (PadlistARRAY (padlist));
600 Safefree (padlist);
601#else
602 AvFILLp (padlist) = -1;
603 AvREAL_off (padlist);
255 SvREFCNT_dec ((SV*)padlist); 604 SvREFCNT_dec ((SV*)padlist);
605#endif
256 } 606 }
257} 607}
258 608
259static int 609static int
260coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 610coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
261{ 611{
262 AV *padlist; 612 PADLIST *padlist;
263 AV *av = (AV *)mg->mg_obj; 613 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
614 size_t len = *(size_t *)mg->mg_ptr;
264 615
265 /* casting is fun. */ 616 /* perl manages to free our internal AV and _then_ call us */
266 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 617 if (IN_DESTRUCT)
618 return 0;
619
620 while (len--)
267 free_padlist (aTHX_ padlist); 621 free_padlist (aTHX_ padlists[len]);
268
269 SvREFCNT_dec (av);
270 622
271 return 0; 623 return 0;
272} 624}
273 625
274#define PERL_MAGIC_coro PERL_MAGIC_ext 626static MGVTBL coro_cv_vtbl = {
275 627 0, 0, 0, 0,
276static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 628 coro_cv_free
277 629};
278#define CORO_MAGIC(cv) \
279 SvMAGIC (cv) \
280 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
281 ? SvMAGIC (cv) \
282 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
283 : 0
284 630
285/* the next two functions merely cache the padlists */ 631/* the next two functions merely cache the padlists */
286static void 632ecb_inline void
287get_padlist (pTHX_ CV *cv) 633get_padlist (pTHX_ CV *cv)
288{ 634{
289 MAGIC *mg = CORO_MAGIC (cv); 635 MAGIC *mg = CORO_MAGIC_cv (cv);
290 AV *av; 636 size_t *lenp;
291 637
292 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 638 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
293 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 639 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
294 else 640 else
295 { 641 {
296#if CORO_PREFER_PERL_FUNCTIONS 642#if CORO_PREFER_PERL_FUNCTIONS
297 /* this is probably cleaner, but also slower? */ 643 /* this is probably cleaner? but also slower! */
644 /* in practise, it seems to be less stable */
298 CV *cp = Perl_cv_clone (cv); 645 CV *cp = Perl_cv_clone (aTHX_ cv);
299 CvPADLIST (cv) = CvPADLIST (cp); 646 CvPADLIST (cv) = CvPADLIST (cp);
300 CvPADLIST (cp) = 0; 647 CvPADLIST (cp) = 0;
301 SvREFCNT_dec (cp); 648 SvREFCNT_dec (cp);
302#else 649#else
303 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 650 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
304#endif 651#endif
305 } 652 }
306} 653}
307 654
308static void 655ecb_inline void
309put_padlist (pTHX_ CV *cv) 656put_padlist (pTHX_ CV *cv)
310{ 657{
311 MAGIC *mg = CORO_MAGIC (cv); 658 MAGIC *mg = CORO_MAGIC_cv (cv);
312 AV *av;
313 659
314 if (!mg) 660 if (ecb_expect_false (!mg))
315 {
316 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
317 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
318 mg->mg_virtual = &vtbl_coro;
319 mg->mg_obj = (SV *)newAV ();
320 } 661 {
662 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
663 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
664 mg->mg_len = 1; /* so mg_free frees mg_ptr */
665 }
666 else
667 Renew (mg->mg_ptr,
668 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
669 char);
321 670
322 av = (AV *)mg->mg_obj; 671 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
323
324 if (AvFILLp (av) >= AvMAX (av))
325 av_extend (av, AvMAX (av) + 1);
326
327 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
328} 672}
329 673
330/** load & save, init *******************************************************/ 674/** load & save, init *******************************************************/
331 675
332#define SB do { 676ecb_inline void
333#define SE } while (0) 677swap_sv (SV *a, SV *b)
678{
679 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
680 SV tmp;
334 681
335#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE 682 /* swap sv_any */
683 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
684
685 /* swap sv_flags */
686 SvFLAGS (&tmp) = SvFLAGS (a);
687 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
688 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
689
690#if PERL_VERSION_ATLEAST (5,10,0)
691 /* perl 5.10 and later complicates this _quite_ a bit, but it also
692 * is much faster, so no quarrels here. alternatively, we could
693 * sv_upgrade to avoid this.
694 */
695 {
696 /* swap sv_u */
697 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
698
699 /* if SvANY points to the head, we need to adjust the pointers,
700 * as the pointer for a still points to b, and maybe vice versa.
701 */
702 #define svany_in_head(type) \
703 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
704
705 if (svany_in_head (SvTYPE (a)))
706 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
707
708 if (svany_in_head (SvTYPE (b)))
709 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
710 }
711#endif
712}
713
714/* swap sv heads, at least logically */
715static void
716swap_svs (pTHX_ Coro__State c)
717{
718 int i;
719
720 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
721 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
722}
723
724#define SWAP_SVS(coro) \
725 if (ecb_expect_false ((coro)->swap_sv)) \
726 swap_svs (aTHX_ (coro))
727
728static void
729on_enterleave_call (pTHX_ SV *cb);
336 730
337static void 731static void
338load_perl (pTHX_ Coro__State c) 732load_perl (pTHX_ Coro__State c)
339{ 733{
340#define VAR(name,type) PL_ ## name = c->name; 734 perl_slots *slot = c->slot;
735 c->slot = 0;
736
737 PL_mainstack = c->mainstack;
738
739#if CORO_JIT
740 load_perl_slots (slot);
741#else
742 #define VARx(name,expr,type) expr = slot->name;
341# include "state.h" 743 #include "state.h"
342#undef VAR 744#endif
343
344 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
345 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
346 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
347 if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
348
349 if (c->irssv)
350 {
351 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
352 {
353 SvREFCNT_dec (c->irssv);
354 c->irssv = 0;
355 }
356 else
357 {
358 REPLACE_SV (PL_rs, c->irssv);
359 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
360 sv_setsv (c->irssv_sv, PL_rs);
361 }
362 }
363 745
364 { 746 {
365 dSP; 747 dSP;
748
366 CV *cv; 749 CV *cv;
367 750
368 /* now do the ugly restore mess */ 751 /* now do the ugly restore mess */
369 while ((cv = (CV *)POPs)) 752 while (ecb_expect_true (cv = (CV *)POPs))
370 { 753 {
371 put_padlist (aTHX_ cv); /* mark this padlist as available */ 754 put_padlist (aTHX_ cv); /* mark this padlist as available */
372 CvDEPTH (cv) = PTR2IV (POPs); 755 CvDEPTH (cv) = PTR2IV (POPs);
373 CvPADLIST (cv) = (AV *)POPs; 756 CvPADLIST (cv) = (PADLIST *)POPs;
374 } 757 }
375 758
376 PUTBACK; 759 PUTBACK;
377 } 760 }
378 assert (!PL_comppad || AvARRAY (PL_comppad));//D 761
762 slf_frame = c->slf_frame;
763 CORO_THROW = c->except;
764
765 if (ecb_expect_false (enable_times))
766 {
767 if (ecb_expect_false (!times_valid))
768 coro_times_update ();
769
770 coro_times_sub (c);
771 }
772
773 if (ecb_expect_false (c->on_enter))
774 {
775 int i;
776
777 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
778 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
779 }
780
781 SWAP_SVS (c);
379} 782}
380 783
381static void 784static void
382save_perl (pTHX_ Coro__State c) 785save_perl (pTHX_ Coro__State c)
383{ 786{
384 assert (!PL_comppad || AvARRAY (PL_comppad));//D 787 SWAP_SVS (c);
788
789 if (ecb_expect_false (c->on_leave))
790 {
791 int i;
792
793 for (i = AvFILLp (c->on_leave); i >= 0; --i)
794 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
795 }
796
797 times_valid = 0;
798
799 if (ecb_expect_false (enable_times))
800 {
801 coro_times_update (); times_valid = 1;
802 coro_times_add (c);
803 }
804
805 c->except = CORO_THROW;
806 c->slf_frame = slf_frame;
807
385 { 808 {
386 dSP; 809 dSP;
387 I32 cxix = cxstack_ix; 810 I32 cxix = cxstack_ix;
388 PERL_CONTEXT *ccstk = cxstack; 811 PERL_CONTEXT *ccstk = cxstack;
389 PERL_SI *top_si = PL_curstackinfo; 812 PERL_SI *top_si = PL_curstackinfo;
… …
391 /* 814 /*
392 * the worst thing you can imagine happens first - we have to save 815 * the worst thing you can imagine happens first - we have to save
393 * (and reinitialize) all cv's in the whole callchain :( 816 * (and reinitialize) all cv's in the whole callchain :(
394 */ 817 */
395 818
396 EXTEND (SP, 3 + 1);
397 PUSHs (Nullsv); 819 XPUSHs (Nullsv);
398 /* this loop was inspired by pp_caller */ 820 /* this loop was inspired by pp_caller */
399 for (;;) 821 for (;;)
400 { 822 {
401 while (cxix >= 0) 823 while (ecb_expect_true (cxix >= 0))
402 { 824 {
403 PERL_CONTEXT *cx = &ccstk[cxix--]; 825 PERL_CONTEXT *cx = &ccstk[cxix--];
404 826
405 if (CxTYPE (cx) == CXt_SUB) 827 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
406 { 828 {
407 CV *cv = cx->blk_sub.cv; 829 CV *cv = cx->blk_sub.cv;
408 830
409 if (CvDEPTH (cv)) 831 if (ecb_expect_true (CvDEPTH (cv)))
410 { 832 {
411 EXTEND (SP, 3); 833 EXTEND (SP, 3);
412 PUSHs ((SV *)CvPADLIST (cv)); 834 PUSHs ((SV *)CvPADLIST (cv));
413 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 835 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
414 PUSHs ((SV *)cv); 836 PUSHs ((SV *)cv);
415 837
416 CvDEPTH (cv) = 0; 838 CvDEPTH (cv) = 0;
417 get_padlist (aTHX_ cv); 839 get_padlist (aTHX_ cv);
418 } 840 }
419 } 841 }
420 } 842 }
421 843
422 if (top_si->si_type == PERLSI_MAIN) 844 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
423 break; 845 break;
424 846
425 top_si = top_si->si_prev; 847 top_si = top_si->si_prev;
426 ccstk = top_si->si_cxstack; 848 ccstk = top_si->si_cxstack;
427 cxix = top_si->si_cxix; 849 cxix = top_si->si_cxix;
428 } 850 }
429 851
430 PUTBACK; 852 PUTBACK;
431 } 853 }
432 854
433 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 855 /* allocate some space on the context stack for our purposes */
434 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 856 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
435 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 857 {
436 c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0; 858 unsigned int i;
437 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
438 859
439#define VAR(name,type)c->name = PL_ ## name; 860 for (i = 0; i < SLOT_COUNT; ++i)
861 CXINC;
862
863 cxstack_ix -= SLOT_COUNT; /* undo allocation */
864 }
865
866 c->mainstack = PL_mainstack;
867
868 {
869 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
870
871#if CORO_JIT
872 save_perl_slots (slot);
873#else
874 #define VARx(name,expr,type) slot->name = expr;
440# include "state.h" 875 #include "state.h"
441#undef VAR 876#endif
877 }
442} 878}
443 879
444/* 880/*
445 * allocate various perl stacks. This is an exact copy 881 * allocate various perl stacks. This is almost an exact copy
446 * of perl.c:init_stacks, except that it uses less memory 882 * of perl.c:init_stacks, except that it uses less memory
447 * on the (sometimes correct) assumption that coroutines do 883 * on the (sometimes correct) assumption that coroutines do
448 * not usually need a lot of stackspace. 884 * not usually need a lot of stackspace.
449 */ 885 */
450#if CORO_PREFER_PERL_FUNCTIONS 886#if CORO_PREFER_PERL_FUNCTIONS
451# define coro_init_stacks init_stacks 887# define coro_init_stacks(thx) init_stacks ()
452#else 888#else
453static void 889static void
454coro_init_stacks (pTHX) 890coro_init_stacks (pTHX)
455{ 891{
456 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 892 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
457 PL_curstackinfo->si_type = PERLSI_MAIN; 893 PL_curstackinfo->si_type = PERLSI_MAIN;
458 PL_curstack = PL_curstackinfo->si_stack; 894 PL_curstack = PL_curstackinfo->si_stack;
459 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 895 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
460 896
461 PL_stack_base = AvARRAY(PL_curstack); 897 PL_stack_base = AvARRAY(PL_curstack);
462 PL_stack_sp = PL_stack_base; 898 PL_stack_sp = PL_stack_base;
463 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 899 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
464 900
465 New(50,PL_tmps_stack,128,SV*); 901 New(50,PL_tmps_stack,32,SV*);
466 PL_tmps_floor = -1; 902 PL_tmps_floor = -1;
467 PL_tmps_ix = -1; 903 PL_tmps_ix = -1;
468 PL_tmps_max = 128; 904 PL_tmps_max = 32;
469 905
470 New(54,PL_markstack,32,I32); 906 New(54,PL_markstack,16,I32);
471 PL_markstack_ptr = PL_markstack; 907 PL_markstack_ptr = PL_markstack;
472 PL_markstack_max = PL_markstack + 32; 908 PL_markstack_max = PL_markstack + 16;
473 909
474#ifdef SET_MARK_OFFSET 910#ifdef SET_MARK_OFFSET
475 SET_MARK_OFFSET; 911 SET_MARK_OFFSET;
476#endif 912#endif
477 913
478 New(54,PL_scopestack,32,I32); 914 New(54,PL_scopestack,8,I32);
479 PL_scopestack_ix = 0; 915 PL_scopestack_ix = 0;
480 PL_scopestack_max = 32; 916 PL_scopestack_max = 8;
917#if HAS_SCOPESTACK_NAME
918 New(54,PL_scopestack_name,8,const char*);
919#endif
481 920
482 New(54,PL_savestack,64,ANY); 921 New(54,PL_savestack,24,ANY);
483 PL_savestack_ix = 0; 922 PL_savestack_ix = 0;
484 PL_savestack_max = 64; 923 PL_savestack_max = 24;
485 924
486#if !PERL_VERSION_ATLEAST (5,9,0) 925#if !PERL_VERSION_ATLEAST (5,10,0)
487 New(54,PL_retstack,16,OP*); 926 New(54,PL_retstack,4,OP*);
488 PL_retstack_ix = 0; 927 PL_retstack_ix = 0;
489 PL_retstack_max = 16; 928 PL_retstack_max = 4;
490#endif 929#endif
491} 930}
492#endif 931#endif
493 932
494/* 933/*
495 * destroy the stacks, the callchain etc... 934 * destroy the stacks, the callchain etc...
496 */ 935 */
497static void 936static void
498coro_destroy_stacks (pTHX) 937coro_destruct_stacks (pTHX)
499{ 938{
500 if (!IN_DESTRUCT)
501 {
502 /* restore all saved variables and stuff */
503 LEAVE_SCOPE (0);
504 assert (PL_tmps_floor == -1);
505
506 /* free all temporaries */
507 FREETMPS;
508 assert (PL_tmps_ix == -1);
509
510 /* unwind all extra stacks */
511 POPSTACK_TO (PL_mainstack);
512
513 /* unwind main stack */
514 dounwind (-1);
515 }
516
517 while (PL_curstackinfo->si_next) 939 while (PL_curstackinfo->si_next)
518 PL_curstackinfo = PL_curstackinfo->si_next; 940 PL_curstackinfo = PL_curstackinfo->si_next;
519 941
520 while (PL_curstackinfo) 942 while (PL_curstackinfo)
521 { 943 {
… …
530 } 952 }
531 953
532 Safefree (PL_tmps_stack); 954 Safefree (PL_tmps_stack);
533 Safefree (PL_markstack); 955 Safefree (PL_markstack);
534 Safefree (PL_scopestack); 956 Safefree (PL_scopestack);
957#if HAS_SCOPESTACK_NAME
958 Safefree (PL_scopestack_name);
959#endif
535 Safefree (PL_savestack); 960 Safefree (PL_savestack);
536#if !PERL_VERSION_ATLEAST (5,9,0) 961#if !PERL_VERSION_ATLEAST (5,10,0)
537 Safefree (PL_retstack); 962 Safefree (PL_retstack);
538#endif 963#endif
539} 964}
540 965
966#define CORO_RSS \
967 rss += sizeof (SYM (curstackinfo)); \
968 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
969 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
970 rss += SYM (tmps_max) * sizeof (SV *); \
971 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
972 rss += SYM (scopestack_max) * sizeof (I32); \
973 rss += SYM (savestack_max) * sizeof (ANY);
974
975static size_t
976coro_rss (pTHX_ struct coro *coro)
977{
978 size_t rss = sizeof (*coro);
979
980 if (coro->mainstack)
981 {
982 if (coro->flags & CF_RUNNING)
983 {
984 #define SYM(sym) PL_ ## sym
985 CORO_RSS;
986 #undef SYM
987 }
988 else
989 {
990 #define SYM(sym) coro->slot->sym
991 CORO_RSS;
992 #undef SYM
993 }
994 }
995
996 return rss;
997}
998
541/** coroutine stack handling ************************************************/ 999/** coroutine stack handling ************************************************/
542 1000
1001static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
1002static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
1003static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
1004
1005/* apparently < 5.8.8 */
1006#ifndef MgPV_nolen_const
1007#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
1008 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
1009 (const char*)(mg)->mg_ptr)
1010#endif
1011
1012/*
1013 * This overrides the default magic get method of %SIG elements.
1014 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
1015 * and instead of trying to save and restore the hash elements (extremely slow),
1016 * we just provide our own readback here.
1017 */
1018static int ecb_cold
1019coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
1020{
1021 const char *s = MgPV_nolen_const (mg);
1022
1023 if (*s == '_')
1024 {
1025 SV **svp = 0;
1026
1027 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1028 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1029
1030 if (svp)
1031 {
1032 SV *ssv;
1033
1034 if (!*svp)
1035 ssv = &PL_sv_undef;
1036 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1037 ssv = sv_2mortal (newRV_inc (*svp));
1038 else
1039 ssv = *svp;
1040
1041 sv_setsv (sv, ssv);
1042 return 0;
1043 }
1044 }
1045
1046 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1047}
1048
1049static int ecb_cold
1050coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1051{
1052 const char *s = MgPV_nolen_const (mg);
1053
1054 if (*s == '_')
1055 {
1056 SV **svp = 0;
1057
1058 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1059 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1060
1061 if (svp)
1062 {
1063 SV *old = *svp;
1064 *svp = 0;
1065 SvREFCNT_dec (old);
1066 return 0;
1067 }
1068 }
1069
1070 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1071}
1072
1073static int ecb_cold
1074coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1075{
1076 const char *s = MgPV_nolen_const (mg);
1077
1078 if (*s == '_')
1079 {
1080 SV **svp = 0;
1081
1082 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1083 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1084
1085 if (svp)
1086 {
1087 SV *old = *svp;
1088 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1089 SvREFCNT_dec (old);
1090 return 0;
1091 }
1092 }
1093
1094 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1095}
1096
1097static void
1098prepare_nop (pTHX_ struct coro_transfer_args *ta)
1099{
1100 /* kind of mega-hacky, but works */
1101 ta->next = ta->prev = (struct coro *)ta;
1102}
1103
543static void 1104static int
1105slf_check_nop (pTHX_ struct CoroSLF *frame)
1106{
1107 return 0;
1108}
1109
1110static int
1111slf_check_repeat (pTHX_ struct CoroSLF *frame)
1112{
1113 return 1;
1114}
1115
1116static UNOP init_perl_op;
1117
1118ecb_noinline static void /* noinline to keep it out of the transfer fast path */
544setup_coro (pTHX_ struct coro *coro) 1119init_perl (pTHX_ struct coro *coro)
545{ 1120{
546 /* 1121 /*
547 * emulate part of the perl startup here. 1122 * emulate part of the perl startup here.
548 */ 1123 */
549 coro_init_stacks (aTHX); 1124 coro_init_stacks (aTHX);
550 1125
1126 PL_runops = RUNOPS_DEFAULT;
551 PL_curcop = &PL_compiling; 1127 PL_curcop = &PL_compiling;
552 PL_in_eval = EVAL_NULL; 1128 PL_in_eval = EVAL_NULL;
553 PL_comppad = 0; 1129 PL_comppad = 0;
1130 PL_comppad_name = 0;
1131 PL_comppad_name_fill = 0;
1132 PL_comppad_name_floor = 0;
554 PL_curpm = 0; 1133 PL_curpm = 0;
1134 PL_curpad = 0;
555 PL_localizing = 0; 1135 PL_localizing = 0;
556 PL_dirty = 0;
557 PL_restartop = 0; 1136 PL_restartop = 0;
1137#if PERL_VERSION_ATLEAST (5,10,0)
1138 PL_parser = 0;
1139#endif
1140 PL_hints = 0;
1141
1142 /* recreate the die/warn hooks */
1143 PL_diehook = SvREFCNT_inc (rv_diehook);
1144 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1145
1146 GvSV (PL_defgv) = newSV (0);
1147 GvAV (PL_defgv) = coro->args; coro->args = 0;
1148 GvSV (PL_errgv) = newSV (0);
1149 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1150 GvHV (PL_hintgv) = 0;
1151 PL_rs = newSVsv (GvSV (irsgv));
1152 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
558 1153
559 { 1154 {
560 dSP; 1155 dSP;
561 LOGOP myop; 1156 UNOP myop;
562 1157
563 SvREFCNT_dec (GvAV (PL_defgv));
564 GvAV (PL_defgv) = coro->args; coro->args = 0;
565
566 Zero (&myop, 1, LOGOP); 1158 Zero (&myop, 1, UNOP);
567 myop.op_next = Nullop; 1159 myop.op_next = Nullop;
1160 myop.op_type = OP_ENTERSUB;
568 myop.op_flags = OPf_WANT_VOID; 1161 myop.op_flags = OPf_WANT_VOID;
569 1162
570 PUSHMARK (SP); 1163 PUSHMARK (SP);
571 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE)); 1164 PUSHs ((SV *)coro->startcv);
572 PUTBACK; 1165 PUTBACK;
573 PL_op = (OP *)&myop; 1166 PL_op = (OP *)&myop;
574 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1167 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
575 SPAGAIN;
576 } 1168 }
577 1169
578 ENTER; /* necessary e.g. for dounwind */ 1170 /* this newly created coroutine might be run on an existing cctx which most
579} 1171 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1172 */
1173 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1174 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1175 slf_frame.destroy = 0;
580 1176
1177 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1178 init_perl_op.op_next = PL_op;
1179 init_perl_op.op_type = OP_ENTERSUB;
1180 init_perl_op.op_ppaddr = pp_slf;
1181 /* no flags etc. required, as an init function won't be called */
1182
1183 PL_op = (OP *)&init_perl_op;
1184
1185 /* copy throw, in case it was set before init_perl */
1186 CORO_THROW = coro->except;
1187
1188 SWAP_SVS (coro);
1189
1190 if (ecb_expect_false (enable_times))
1191 {
1192 coro_times_update ();
1193 coro_times_sub (coro);
1194 }
1195}
1196
581static void 1197static void
1198coro_unwind_stacks (pTHX)
1199{
1200 if (!IN_DESTRUCT)
1201 {
1202 /* restore all saved variables and stuff */
1203 LEAVE_SCOPE (0);
1204 assert (PL_tmps_floor == -1);
1205
1206 /* free all temporaries */
1207 FREETMPS;
1208 assert (PL_tmps_ix == -1);
1209
1210 /* unwind all extra stacks */
1211 POPSTACK_TO (PL_mainstack);
1212
1213 /* unwind main stack */
1214 dounwind (-1);
1215 }
1216}
1217
1218static void
1219destroy_perl (pTHX_ struct coro *coro)
1220{
1221 SV *svf [9];
1222
1223 {
1224 SV *old_current = SvRV (coro_current);
1225 struct coro *current = SvSTATE (old_current);
1226
1227 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1228
1229 save_perl (aTHX_ current);
1230
1231 /* this will cause transfer_check to croak on block*/
1232 SvRV_set (coro_current, (SV *)coro->hv);
1233
1234 load_perl (aTHX_ coro);
1235
1236 coro_unwind_stacks (aTHX);
1237
1238 /* restore swapped sv's */
1239 SWAP_SVS (coro);
1240
1241 coro_destruct_stacks (aTHX);
1242
1243 /* now save some sv's to be free'd later */
1244 svf [0] = GvSV (PL_defgv);
1245 svf [1] = (SV *)GvAV (PL_defgv);
1246 svf [2] = GvSV (PL_errgv);
1247 svf [3] = (SV *)PL_defoutgv;
1248 svf [4] = PL_rs;
1249 svf [5] = GvSV (irsgv);
1250 svf [6] = (SV *)GvHV (PL_hintgv);
1251 svf [7] = PL_diehook;
1252 svf [8] = PL_warnhook;
1253 assert (9 == sizeof (svf) / sizeof (*svf));
1254
1255 SvRV_set (coro_current, old_current);
1256
1257 load_perl (aTHX_ current);
1258 }
1259
1260 {
1261 unsigned int i;
1262
1263 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1264 SvREFCNT_dec (svf [i]);
1265
1266 SvREFCNT_dec (coro->saved_deffh);
1267 SvREFCNT_dec (coro->rouse_cb);
1268 SvREFCNT_dec (coro->invoke_cb);
1269 SvREFCNT_dec (coro->invoke_av);
1270 }
1271}
1272
1273ecb_inline void
582free_coro_mortal (pTHX) 1274free_coro_mortal (pTHX)
583{ 1275{
584 if (coro_mortal) 1276 if (ecb_expect_true (coro_mortal))
585 { 1277 {
586 SvREFCNT_dec (coro_mortal); 1278 SvREFCNT_dec ((SV *)coro_mortal);
587 coro_mortal = 0; 1279 coro_mortal = 0;
588 } 1280 }
589} 1281}
590 1282
591/* inject a fake call to Coro::State::_cctx_init into the execution */
592static void NOINLINE
593prepare_cctx (pTHX_ coro_cctx *cctx)
594{
595 dSP;
596 LOGOP myop;
597
598 Zero (&myop, 1, LOGOP);
599 myop.op_next = PL_op;
600 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
601
602 PUSHMARK (SP);
603 EXTEND (SP, 2);
604 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
605 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
606 PUTBACK;
607 PL_op = (OP *)&myop;
608 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
609 SPAGAIN;
610}
611
612static void 1283static int
613coro_run (void *arg) 1284runops_trace (pTHX)
614{ 1285{
615 dTHX; 1286 COP *oldcop = 0;
1287 int oldcxix = -2;
616 1288
617 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1289 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
618 UNLOCK; 1290 {
1291 PERL_ASYNC_CHECK ();
619 1292
620 /* 1293 if (cctx_current->flags & CC_TRACE_ALL)
621 * this is a _very_ stripped down perl interpreter ;) 1294 {
622 */ 1295 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1296 {
1297 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1298 SV **bot, **top;
1299 AV *av = newAV (); /* return values */
1300 SV **cb;
1301 dSP;
1302
1303 GV *gv = CvGV (cx->blk_sub.cv);
1304 SV *fullname = sv_2mortal (newSV (0));
1305 if (isGV (gv))
1306 gv_efullname3 (fullname, gv, 0);
1307
1308 bot = PL_stack_base + cx->blk_oldsp + 1;
1309 top = cx->blk_gimme == G_ARRAY ? SP + 1
1310 : cx->blk_gimme == G_SCALAR ? bot + 1
1311 : bot;
1312
1313 av_extend (av, top - bot);
1314 while (bot < top)
1315 av_push (av, SvREFCNT_inc_NN (*bot++));
1316
1317 PL_runops = RUNOPS_DEFAULT;
1318 ENTER;
1319 SAVETMPS;
1320 EXTEND (SP, 3);
1321 PUSHMARK (SP);
1322 PUSHs (&PL_sv_no);
1323 PUSHs (fullname);
1324 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1325 PUTBACK;
1326 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1327 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1328 SPAGAIN;
1329 FREETMPS;
1330 LEAVE;
1331 PL_runops = runops_trace;
1332 }
1333
1334 if (oldcop != PL_curcop)
1335 {
1336 oldcop = PL_curcop;
1337
1338 if (PL_curcop != &PL_compiling)
1339 {
1340 SV **cb;
1341
1342 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1343 {
1344 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1345
1346 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1347 {
1348 dSP;
1349 GV *gv = CvGV (cx->blk_sub.cv);
1350 SV *fullname = sv_2mortal (newSV (0));
1351
1352 if (isGV (gv))
1353 gv_efullname3 (fullname, gv, 0);
1354
1355 PL_runops = RUNOPS_DEFAULT;
1356 ENTER;
1357 SAVETMPS;
1358 EXTEND (SP, 3);
1359 PUSHMARK (SP);
1360 PUSHs (&PL_sv_yes);
1361 PUSHs (fullname);
1362 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1363 PUTBACK;
1364 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1365 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1366 SPAGAIN;
1367 FREETMPS;
1368 LEAVE;
1369 PL_runops = runops_trace;
1370 }
1371
1372 oldcxix = cxstack_ix;
1373 }
1374
1375 if (cctx_current->flags & CC_TRACE_LINE)
1376 {
1377 dSP;
1378
1379 PL_runops = RUNOPS_DEFAULT;
1380 ENTER;
1381 SAVETMPS;
1382 EXTEND (SP, 3);
1383 PL_runops = RUNOPS_DEFAULT;
1384 PUSHMARK (SP);
1385 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1386 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1387 PUTBACK;
1388 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1389 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1390 SPAGAIN;
1391 FREETMPS;
1392 LEAVE;
1393 PL_runops = runops_trace;
1394 }
1395 }
1396 }
1397 }
1398 }
1399
1400 TAINT_NOT;
1401 return 0;
1402}
1403
1404static struct CoroSLF cctx_ssl_frame;
1405
1406static void
1407slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1408{
1409 ta->prev = 0;
1410}
1411
1412static int
1413slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1414{
1415 *frame = cctx_ssl_frame;
1416
1417 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1418}
1419
1420/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1421static void ecb_noinline
1422cctx_prepare (pTHX)
1423{
623 PL_top_env = &PL_start_env; 1424 PL_top_env = &PL_start_env;
624 1425
1426 if (cctx_current->flags & CC_TRACE)
1427 PL_runops = runops_trace;
1428
1429 /* we already must be executing an SLF op, there is no other valid way
1430 * that can lead to creation of a new cctx */
1431 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1432 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1433
1434 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1435 cctx_ssl_frame = slf_frame;
1436
1437 slf_frame.prepare = slf_prepare_set_stacklevel;
1438 slf_frame.check = slf_check_set_stacklevel;
1439}
1440
1441/* the tail of transfer: execute stuff we can only do after a transfer */
1442ecb_inline void
1443transfer_tail (pTHX)
1444{
1445 free_coro_mortal (aTHX);
1446}
1447
1448/* try to exit the same way perl's main function would do */
1449/* we do not bother resetting the environment or other things *7
1450/* that are not, uhm, essential */
1451/* this obviously also doesn't work when perl is embedded */
1452static void ecb_noinline ecb_cold
1453perlish_exit (pTHX)
1454{
1455 int exitstatus = perl_destruct (PL_curinterp);
1456 perl_free (PL_curinterp);
1457 exit (exitstatus);
1458}
1459
1460/*
1461 * this is a _very_ stripped down perl interpreter ;)
1462 */
1463static void
1464cctx_run (void *arg)
1465{
1466#ifdef USE_ITHREADS
1467# if CORO_PTHREAD
1468 PERL_SET_CONTEXT (coro_thx);
1469# endif
1470#endif
1471 {
1472 dTHX;
1473
1474 /* normally we would need to skip the entersub here */
1475 /* not doing so will re-execute it, which is exactly what we want */
1476 /* PL_nop = PL_nop->op_next */
1477
625 /* inject call to cctx_init */ 1478 /* inject a fake subroutine call to cctx_init */
626 prepare_cctx (aTHX_ (coro_cctx *)arg); 1479 cctx_prepare (aTHX);
627 1480
1481 /* cctx_run is the alternative tail of transfer() */
1482 transfer_tail (aTHX);
1483
628 /* somebody will hit me for both perl_run and PL_restartop */ 1484 /* somebody or something will hit me for both perl_run and PL_restartop */
629 PL_restartop = PL_op; 1485 PL_restartop = PL_op;
630 perl_run (PL_curinterp); 1486 perl_run (PL_curinterp);
1487 /*
1488 * Unfortunately, there is no way to get at the return values of the
1489 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1490 * runtime errors here, as this is just a random interpreter, not a thread.
1491 */
631 1492
632 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1493 /*
633 abort (); 1494 * If perl-run returns we assume exit() was being called or the coro
1495 * fell off the end, which seems to be the only valid (non-bug)
1496 * reason for perl_run to return. We try to mimic whatever perl is normally
1497 * doing in that case. YMMV.
1498 */
1499 perlish_exit (aTHX);
1500 }
634} 1501}
635 1502
636static coro_cctx * 1503static coro_cctx *
637cctx_new () 1504cctx_new (void)
638{ 1505{
639 coro_cctx *cctx; 1506 coro_cctx *cctx;
1507
1508 ++cctx_count;
1509 New (0, cctx, 1, coro_cctx);
1510
1511 cctx->gen = cctx_gen;
1512 cctx->flags = 0;
1513 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1514
1515 return cctx;
1516}
1517
1518/* create a new cctx only suitable as source */
1519static coro_cctx *
1520cctx_new_empty (void)
1521{
1522 coro_cctx *cctx = cctx_new ();
1523
1524 cctx->sptr = 0;
1525 coro_create (&cctx->cctx, 0, 0, 0, 0);
1526
1527 return cctx;
1528}
1529
1530/* create a new cctx suitable as destination/running a perl interpreter */
1531static coro_cctx *
1532cctx_new_run (void)
1533{
1534 coro_cctx *cctx = cctx_new ();
640 void *stack_start; 1535 void *stack_start;
641 size_t stack_size; 1536 size_t stack_size;
642 1537
643 ++cctx_count;
644
645 Newz (0, cctx, 1, coro_cctx);
646
647#if HAVE_MMAP 1538#if HAVE_MMAP
648
649 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1539 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
650 /* mmap supposedly does allocate-on-write for us */ 1540 /* mmap supposedly does allocate-on-write for us */
651 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1541 cctx->sptr = mmap (0, cctx->ssize, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_ANONYMOUS, -1, 0);
652 1542
653 if (cctx->sptr != (void *)-1) 1543 if (cctx->sptr != (void *)-1)
654 { 1544 {
655# if CORO_STACKGUARD 1545 #if CORO_STACKGUARD
656 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1546 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
657# endif 1547 #endif
658 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1548 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
659 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1549 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
660 cctx->mapped = 1; 1550 cctx->flags |= CC_MAPPED;
661 } 1551 }
662 else 1552 else
663#endif 1553#endif
664 { 1554 {
665 cctx->ssize = coro_stacksize * (long)sizeof (long); 1555 cctx->ssize = cctx_stacksize * (long)sizeof (long);
666 New (0, cctx->sptr, coro_stacksize, long); 1556 New (0, cctx->sptr, cctx_stacksize, long);
667 1557
668 if (!cctx->sptr) 1558 if (!cctx->sptr)
669 { 1559 {
670 perror ("FATAL: unable to allocate stack for coroutine"); 1560 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
671 _exit (EXIT_FAILURE); 1561 _exit (EXIT_FAILURE);
672 } 1562 }
673 1563
674 stack_start = cctx->sptr; 1564 stack_start = cctx->sptr;
675 stack_size = cctx->ssize; 1565 stack_size = cctx->ssize;
676 } 1566 }
677 1567
678 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1568 #if CORO_USE_VALGRIND
1569 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1570 #endif
1571
679 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1572 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
680 1573
681 return cctx; 1574 return cctx;
682} 1575}
683 1576
684static void 1577static void
685cctx_destroy (coro_cctx *cctx) 1578cctx_destroy (coro_cctx *cctx)
686{ 1579{
687 if (!cctx) 1580 if (!cctx)
688 return; 1581 return;
689 1582
1583 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1584
690 --cctx_count; 1585 --cctx_count;
1586 coro_destroy (&cctx->cctx);
691 1587
1588 /* coro_transfer creates new, empty cctx's */
1589 if (cctx->sptr)
1590 {
692#if CORO_USE_VALGRIND 1591 #if CORO_USE_VALGRIND
693 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1592 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
694#endif 1593 #endif
695 1594
696#if HAVE_MMAP 1595#if HAVE_MMAP
697 if (cctx->mapped) 1596 if (cctx->flags & CC_MAPPED)
698 munmap (cctx->sptr, cctx->ssize); 1597 munmap (cctx->sptr, cctx->ssize);
699 else 1598 else
700#endif 1599#endif
701 Safefree (cctx->sptr); 1600 Safefree (cctx->sptr);
1601 }
702 1602
703 Safefree (cctx); 1603 Safefree (cctx);
704} 1604}
1605
1606/* wether this cctx should be destructed */
1607#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
705 1608
706static coro_cctx * 1609static coro_cctx *
707cctx_get (pTHX) 1610cctx_get (pTHX)
708{ 1611{
709 while (cctx_first) 1612 while (ecb_expect_true (cctx_first))
710 { 1613 {
711 coro_cctx *cctx = cctx_first; 1614 coro_cctx *cctx = cctx_first;
712 cctx_first = cctx->next; 1615 cctx_first = cctx->next;
713 --cctx_idle; 1616 --cctx_idle;
714 1617
715 if (cctx->ssize >= coro_stacksize) 1618 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
716 return cctx; 1619 return cctx;
717 1620
718 cctx_destroy (cctx); 1621 cctx_destroy (cctx);
719 } 1622 }
720 1623
721 PL_op = PL_op->op_next;
722 return cctx_new (); 1624 return cctx_new_run ();
723} 1625}
724 1626
725static void 1627static void
726cctx_put (coro_cctx *cctx) 1628cctx_put (coro_cctx *cctx)
727{ 1629{
1630 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1631
728 /* free another cctx if overlimit */ 1632 /* free another cctx if overlimit */
729 if (cctx_idle >= MAX_IDLE_CCTX) 1633 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
730 { 1634 {
731 coro_cctx *first = cctx_first; 1635 coro_cctx *first = cctx_first;
732 cctx_first = first->next; 1636 cctx_first = first->next;
733 --cctx_idle; 1637 --cctx_idle;
734 1638
735 assert (!first->inuse);
736 cctx_destroy (first); 1639 cctx_destroy (first);
737 } 1640 }
738 1641
739 ++cctx_idle; 1642 ++cctx_idle;
740 cctx->next = cctx_first; 1643 cctx->next = cctx_first;
741 cctx_first = cctx; 1644 cctx_first = cctx;
742} 1645}
743 1646
744/** coroutine switching *****************************************************/ 1647/** coroutine switching *****************************************************/
745 1648
746/* never call directly, always through the coro_state_transfer global variable */ 1649static void
747static void NOINLINE
748transfer (pTHX_ struct coro *prev, struct coro *next) 1650transfer_check (pTHX_ struct coro *prev, struct coro *next)
1651{
1652 /* TODO: throwing up here is considered harmful */
1653
1654 if (ecb_expect_true (prev != next))
1655 {
1656 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1657 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1658
1659 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1660 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1661
1662#if !PERL_VERSION_ATLEAST (5,10,0)
1663 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1664 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1665#endif
1666 }
1667}
1668
1669/* always use the TRANSFER macro */
1670static void ecb_noinline /* noinline so we have a fixed stackframe */
1671transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
749{ 1672{
750 dSTACKLEVEL; 1673 dSTACKLEVEL;
751 1674
752 /* sometimes transfer is only called to set idle_sp */ 1675 /* sometimes transfer is only called to set idle_sp */
753 if (!next) 1676 if (ecb_expect_false (!prev))
754 { 1677 {
755 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1678 cctx_current->idle_sp = STACKLEVEL;
756 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1679 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
757 }
758 else if (prev != next)
759 { 1680 }
1681 else if (ecb_expect_true (prev != next))
1682 {
760 coro_cctx *prev__cctx; 1683 coro_cctx *cctx_prev;
761 1684
762 if (prev->flags & CF_NEW) 1685 if (ecb_expect_false (prev->flags & CF_NEW))
763 { 1686 {
764 /* create a new empty context */ 1687 /* create a new empty/source context */
765 Newz (0, prev->cctx, 1, coro_cctx);
766 prev->cctx->inuse = 1;
767 prev->flags &= ~CF_NEW; 1688 prev->flags &= ~CF_NEW;
768 prev->flags |= CF_RUNNING; 1689 prev->flags |= CF_RUNNING;
769 } 1690 }
770 1691
771 /*TODO: must not croak here */
772 if (!prev->flags & CF_RUNNING)
773 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
774
775 if (next->flags & CF_RUNNING)
776 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
777
778 if (next->flags & CF_DESTROYED)
779 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
780
781 prev->flags &= ~CF_RUNNING; 1692 prev->flags &= ~CF_RUNNING;
782 next->flags |= CF_RUNNING; 1693 next->flags |= CF_RUNNING;
783 1694
784 LOCK; 1695 /* first get rid of the old state */
1696 save_perl (aTHX_ prev);
785 1697
786 if (next->flags & CF_NEW) 1698 if (ecb_expect_false (next->flags & CF_NEW))
787 { 1699 {
788 /* need to start coroutine */ 1700 /* need to start coroutine */
789 next->flags &= ~CF_NEW; 1701 next->flags &= ~CF_NEW;
790 /* first get rid of the old state */
791 save_perl (aTHX_ prev);
792 /* setup coroutine call */ 1702 /* setup coroutine call */
793 setup_coro (aTHX_ next); 1703 init_perl (aTHX_ next);
794 /* need a new stack */
795 assert (!next->cctx);
796 } 1704 }
797 else 1705 else
1706 load_perl (aTHX_ next);
1707
1708 /* possibly untie and reuse the cctx */
1709 if (ecb_expect_true (
1710 cctx_current->idle_sp == STACKLEVEL
1711 && !(cctx_current->flags & CC_TRACE)
1712 && !force_cctx
1713 ))
798 { 1714 {
799 /* coroutine already started */ 1715 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
800 save_perl (aTHX_ prev); 1716 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
801 load_perl (aTHX_ next); 1717
1718 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1719 /* without this the next cctx_get might destroy the running cctx while still in use */
1720 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1721 if (ecb_expect_true (!next->cctx))
1722 next->cctx = cctx_get (aTHX);
1723
1724 cctx_put (cctx_current);
802 } 1725 }
1726 else
1727 prev->cctx = cctx_current;
803 1728
804 prev__cctx = prev->cctx; 1729 ++next->usecount;
805 1730
806 /* possibly "free" the cctx */ 1731 cctx_prev = cctx_current;
807 if (prev__cctx->idle_sp == STACKLEVEL) 1732 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1733
1734 next->cctx = 0;
1735
1736 if (ecb_expect_false (cctx_prev != cctx_current))
808 { 1737 {
809 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1738 cctx_prev->top_env = PL_top_env;
810 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1739 PL_top_env = cctx_current->top_env;
811 1740 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
812 prev->cctx = 0;
813
814 cctx_put (prev__cctx);
815 prev__cctx->inuse = 0;
816 } 1741 }
817 1742
818 if (!next->cctx) 1743 transfer_tail (aTHX);
819 {
820 next->cctx = cctx_get (aTHX);
821 assert (!next->cctx->inuse);
822 next->cctx->inuse = 1;
823 }
824
825 if (prev__cctx != next->cctx)
826 {
827 prev__cctx->top_env = PL_top_env;
828 PL_top_env = next->cctx->top_env;
829 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
830 }
831
832 free_coro_mortal (aTHX);
833 UNLOCK;
834 } 1744 }
835} 1745}
836 1746
837struct transfer_args 1747#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
838{
839 struct coro *prev, *next;
840};
841
842#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1748#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
843 1749
844/** high level stuff ********************************************************/ 1750/** high level stuff ********************************************************/
845 1751
1752/* this function is actually Coro, not Coro::State, but we call it from here */
1753/* because it is convenient - but it hasn't been declared yet for that reason */
846static int 1754static void
1755coro_call_on_destroy (pTHX_ struct coro *coro);
1756
1757static void
847coro_state_destroy (pTHX_ struct coro *coro) 1758coro_state_destroy (pTHX_ struct coro *coro)
848{ 1759{
849 if (coro->flags & CF_DESTROYED) 1760 if (coro->flags & CF_ZOMBIE)
850 return 0; 1761 return;
851 1762
1763 slf_destroy (aTHX_ coro);
1764
852 coro->flags |= CF_DESTROYED; 1765 coro->flags |= CF_ZOMBIE;
853 1766
854 if (coro->flags & CF_READY) 1767 if (coro->flags & CF_READY)
855 { 1768 {
856 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1769 /* reduce nready, as destroying a ready coro effectively unreadies it */
857 /* alternative: look through all ready queues and remove the coro */ 1770 /* alternative: look through all ready queues and remove the coro */
858 LOCK;
859 --coro_nready; 1771 --coro_nready;
860 UNLOCK;
861 } 1772 }
862 else 1773 else
863 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1774 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
864 1775
865 if (coro->mainstack && coro->mainstack != main_mainstack) 1776 if (coro->next) coro->next->prev = coro->prev;
866 { 1777 if (coro->prev) coro->prev->next = coro->next;
867 struct coro temp; 1778 if (coro == coro_first) coro_first = coro->next;
868 1779
869 assert (!(coro->flags & CF_RUNNING)); 1780 if (coro->mainstack
870 1781 && coro->mainstack != main_mainstack
871 Zero (&temp, 1, struct coro); 1782 && coro->slot
872 temp.save = CORO_SAVE_DEF; 1783 && !PL_dirty)
873
874 if (coro->flags & CF_RUNNING)
875 croak ("FATAL: tried to destroy currently running coroutine");
876
877 save_perl (aTHX_ &temp);
878 load_perl (aTHX_ coro); 1784 destroy_perl (aTHX_ coro);
879
880 coro_destroy_stacks (aTHX);
881
882 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
883
884 coro->mainstack = 0;
885 }
886 1785
887 cctx_destroy (coro->cctx); 1786 cctx_destroy (coro->cctx);
1787 SvREFCNT_dec (coro->startcv);
888 SvREFCNT_dec (coro->args); 1788 SvREFCNT_dec (coro->args);
1789 SvREFCNT_dec (coro->swap_sv);
1790 SvREFCNT_dec (CORO_THROW);
889 1791
890 return 1; 1792 coro_call_on_destroy (aTHX_ coro);
1793
1794 /* more destruction mayhem in coro_state_free */
891} 1795}
892 1796
893static int 1797static int
894coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1798coro_state_free (pTHX_ SV *sv, MAGIC *mg)
895{ 1799{
896 struct coro *coro = (struct coro *)mg->mg_ptr; 1800 struct coro *coro = (struct coro *)mg->mg_ptr;
897 mg->mg_ptr = 0; 1801 mg->mg_ptr = 0;
898 1802
899 if (--coro->refcnt < 0)
900 {
901 coro_state_destroy (aTHX_ coro); 1803 coro_state_destroy (aTHX_ coro);
1804 SvREFCNT_dec (coro->on_destroy);
1805 SvREFCNT_dec (coro->status);
1806
902 Safefree (coro); 1807 Safefree (coro);
903 }
904 1808
905 return 0; 1809 return 0;
906} 1810}
907 1811
908static int 1812static int ecb_cold
909coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1813coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
910{ 1814{
911 struct coro *coro = (struct coro *)mg->mg_ptr; 1815 /* called when perl clones the current process the slow way (windows process emulation) */
912 1816 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
913 ++coro->refcnt; 1817 mg->mg_ptr = 0;
1818 mg->mg_virtual = 0;
914 1819
915 return 0; 1820 return 0;
916} 1821}
917 1822
918static MGVTBL coro_state_vtbl = { 1823static MGVTBL coro_state_vtbl = {
… …
924#else 1829#else
925# define MGf_DUP 0 1830# define MGf_DUP 0
926#endif 1831#endif
927}; 1832};
928 1833
929static struct coro *
930SvSTATE_ (pTHX_ SV *coro)
931{
932 HV *stash;
933 MAGIC *mg;
934
935 if (SvROK (coro))
936 coro = SvRV (coro);
937
938 stash = SvSTASH (coro);
939 if (stash != coro_stash && stash != coro_state_stash)
940 {
941 /* very slow, but rare, check */
942 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
943 croak ("Coro::State object required");
944 }
945
946 mg = CORO_MAGIC (coro);
947 return (struct coro *)mg->mg_ptr;
948}
949
950#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
951
952static void 1834static void
953prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1835prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
954{ 1836{
955 ta->prev = SvSTATE (prev_sv); 1837 ta->prev = SvSTATE (prev_sv);
956 ta->next = SvSTATE (next_sv); 1838 ta->next = SvSTATE (next_sv);
1839 TRANSFER_CHECK (*ta);
957} 1840}
958 1841
959static void 1842static void
960api_transfer (SV *prev_sv, SV *next_sv) 1843api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1844{
1845 struct coro_transfer_args ta;
1846
1847 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1848 TRANSFER (ta, 1);
1849}
1850
1851/** Coro ********************************************************************/
1852
1853ecb_inline void
1854coro_enq (pTHX_ struct coro *coro)
1855{
1856 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1857
1858 SvREFCNT_inc_NN (coro->hv);
1859
1860 coro->next_ready = 0;
1861 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1862 ready [1] = coro;
1863}
1864
1865ecb_inline struct coro *
1866coro_deq (pTHX)
1867{
1868 int prio;
1869
1870 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1871 {
1872 struct coro **ready = coro_ready [prio];
1873
1874 if (ready [0])
1875 {
1876 struct coro *coro = ready [0];
1877 ready [0] = coro->next_ready;
1878 return coro;
1879 }
1880 }
1881
1882 return 0;
1883}
1884
1885static void
1886invoke_sv_ready_hook_helper (void)
961{ 1887{
962 dTHX; 1888 dTHX;
963 struct transfer_args ta; 1889 dSP;
964 1890
965 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1891 ENTER;
966 TRANSFER (ta); 1892 SAVETMPS;
1893
1894 PUSHMARK (SP);
1895 PUTBACK;
1896 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1897
1898 FREETMPS;
1899 LEAVE;
967} 1900}
968 1901
969static int 1902static int
970api_save (SV *coro_sv, int new_save) 1903api_ready (pTHX_ SV *coro_sv)
971{ 1904{
972 dTHX;
973 struct coro *coro = SvSTATE (coro_sv); 1905 struct coro *coro = SvSTATE (coro_sv);
974 int old_save = coro->save;
975
976 if (new_save >= 0)
977 coro->save = new_save;
978
979 return old_save;
980}
981
982/** Coro ********************************************************************/
983
984static void
985coro_enq (pTHX_ SV *coro_sv)
986{
987 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
988}
989
990static SV *
991coro_deq (pTHX_ int min_prio)
992{
993 int prio = PRIO_MAX - PRIO_MIN;
994
995 min_prio -= PRIO_MIN;
996 if (min_prio < 0)
997 min_prio = 0;
998
999 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1000 if (AvFILLp (coro_ready [prio]) >= 0)
1001 return av_shift (coro_ready [prio]);
1002
1003 return 0;
1004}
1005
1006static int
1007api_ready (SV *coro_sv)
1008{
1009 dTHX;
1010 struct coro *coro;
1011
1012 if (SvROK (coro_sv))
1013 coro_sv = SvRV (coro_sv);
1014
1015 coro = SvSTATE (coro_sv);
1016 1906
1017 if (coro->flags & CF_READY) 1907 if (coro->flags & CF_READY)
1018 return 0; 1908 return 0;
1019 1909
1020 coro->flags |= CF_READY; 1910 coro->flags |= CF_READY;
1021 1911
1022 LOCK; 1912 coro_enq (aTHX_ coro);
1023 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1913
1024 ++coro_nready; 1914 if (!coro_nready++)
1025 UNLOCK; 1915 if (coroapi.readyhook)
1916 coroapi.readyhook ();
1026 1917
1027 return 1; 1918 return 1;
1028} 1919}
1029 1920
1030static int 1921static int
1031api_is_ready (SV *coro_sv) 1922api_is_ready (pTHX_ SV *coro_sv)
1032{ 1923{
1033 dTHX;
1034 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1924 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1035} 1925}
1036 1926
1927/* expects to own a reference to next->hv */
1928ecb_inline void
1929prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1930{
1931 SV *prev_sv = SvRV (coro_current);
1932
1933 ta->prev = SvSTATE_hv (prev_sv);
1934 ta->next = next;
1935
1936 TRANSFER_CHECK (*ta);
1937
1938 SvRV_set (coro_current, (SV *)next->hv);
1939
1940 free_coro_mortal (aTHX);
1941 coro_mortal = prev_sv;
1942}
1943
1037static void 1944static void
1038prepare_schedule (pTHX_ struct transfer_args *ta) 1945prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1039{ 1946{
1040 SV *prev_sv, *next_sv;
1041
1042 for (;;) 1947 for (;;)
1043 { 1948 {
1044 LOCK; 1949 struct coro *next = coro_deq (aTHX);
1045 next_sv = coro_deq (aTHX_ PRIO_MIN);
1046 1950
1951 if (ecb_expect_true (next))
1952 {
1953 /* cannot transfer to destroyed coros, skip and look for next */
1954 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1955 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1956 else
1957 {
1958 next->flags &= ~CF_READY;
1959 --coro_nready;
1960
1961 prepare_schedule_to (aTHX_ ta, next);
1962 break;
1963 }
1964 }
1965 else
1966 {
1047 /* nothing to schedule: call the idle handler */ 1967 /* nothing to schedule: call the idle handler */
1048 if (!next_sv) 1968 if (SvROK (sv_idle)
1969 && SvOBJECT (SvRV (sv_idle)))
1970 {
1971 if (SvRV (sv_idle) == SvRV (coro_current))
1972 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1973
1974 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1975 api_ready (aTHX_ SvRV (sv_idle));
1976 --coro_nready;
1977 }
1978 else
1979 {
1980 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1981 dSP;
1982
1983 ENTER;
1984 SAVETMPS;
1985
1986 PUSHMARK (SP);
1987 PUTBACK;
1988 call_sv (sv_idle, G_VOID | G_DISCARD);
1989
1990 FREETMPS;
1991 LEAVE;
1992 }
1993 }
1994 }
1995}
1996
1997ecb_inline void
1998prepare_cede (pTHX_ struct coro_transfer_args *ta)
1999{
2000 api_ready (aTHX_ coro_current);
2001 prepare_schedule (aTHX_ ta);
2002}
2003
2004ecb_inline void
2005prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
2006{
2007 SV *prev = SvRV (coro_current);
2008
2009 if (coro_nready)
2010 {
2011 prepare_schedule (aTHX_ ta);
2012 api_ready (aTHX_ prev);
2013 }
2014 else
2015 prepare_nop (aTHX_ ta);
2016}
2017
2018static void
2019api_schedule (pTHX)
2020{
2021 struct coro_transfer_args ta;
2022
2023 prepare_schedule (aTHX_ &ta);
2024 TRANSFER (ta, 1);
2025}
2026
2027static void
2028api_schedule_to (pTHX_ SV *coro_sv)
2029{
2030 struct coro_transfer_args ta;
2031 struct coro *next = SvSTATE (coro_sv);
2032
2033 SvREFCNT_inc_NN (coro_sv);
2034 prepare_schedule_to (aTHX_ &ta, next);
2035}
2036
2037static int
2038api_cede (pTHX)
2039{
2040 struct coro_transfer_args ta;
2041
2042 prepare_cede (aTHX_ &ta);
2043
2044 if (ecb_expect_true (ta.prev != ta.next))
2045 {
2046 TRANSFER (ta, 1);
2047 return 1;
2048 }
2049 else
2050 return 0;
2051}
2052
2053static int
2054api_cede_notself (pTHX)
2055{
2056 if (coro_nready)
2057 {
2058 struct coro_transfer_args ta;
2059
2060 prepare_cede_notself (aTHX_ &ta);
2061 TRANSFER (ta, 1);
2062 return 1;
2063 }
2064 else
2065 return 0;
2066}
2067
2068static void
2069api_trace (pTHX_ SV *coro_sv, int flags)
2070{
2071 struct coro *coro = SvSTATE (coro_sv);
2072
2073 if (coro->flags & CF_RUNNING)
2074 croak ("cannot enable tracing on a running coroutine, caught");
2075
2076 if (flags & CC_TRACE)
2077 {
2078 if (!coro->cctx)
2079 coro->cctx = cctx_new_run ();
2080 else if (!(coro->cctx->flags & CC_TRACE))
2081 croak ("cannot enable tracing on coroutine with custom stack, caught");
2082
2083 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2084 }
2085 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2086 {
2087 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2088
2089 if (coro->flags & CF_RUNNING)
2090 PL_runops = RUNOPS_DEFAULT;
2091 else
2092 coro->slot->runops = RUNOPS_DEFAULT;
2093 }
2094}
2095
2096static void
2097coro_push_av (pTHX_ AV *av, I32 gimme_v)
2098{
2099 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2100 {
2101 dSP;
2102
2103 if (gimme_v == G_SCALAR)
2104 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2105 else
2106 {
2107 int i;
2108 EXTEND (SP, AvFILLp (av) + 1);
2109
2110 for (i = 0; i <= AvFILLp (av); ++i)
2111 PUSHs (AvARRAY (av)[i]);
2112 }
2113
2114 PUTBACK;
2115 }
2116}
2117
2118static void
2119coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2120{
2121 if (!coro->on_destroy)
2122 coro->on_destroy = newAV ();
2123
2124 av_push (coro->on_destroy, cb);
2125}
2126
2127static void
2128slf_destroy_join (pTHX_ struct CoroSLF *frame)
2129{
2130 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2131}
2132
2133static int
2134slf_check_join (pTHX_ struct CoroSLF *frame)
2135{
2136 struct coro *coro = (struct coro *)frame->data;
2137
2138 if (!coro->status)
2139 return 1;
2140
2141 frame->destroy = 0;
2142
2143 coro_push_av (aTHX_ coro->status, GIMME_V);
2144
2145 SvREFCNT_dec ((SV *)coro->hv);
2146
2147 return 0;
2148}
2149
2150static void
2151slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2152{
2153 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2154
2155 if (items > 1)
2156 croak ("join called with too many arguments");
2157
2158 if (coro->status)
2159 frame->prepare = prepare_nop;
2160 else
2161 {
2162 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2163 frame->prepare = prepare_schedule;
2164 }
2165
2166 frame->check = slf_check_join;
2167 frame->destroy = slf_destroy_join;
2168 frame->data = (void *)coro;
2169 SvREFCNT_inc (coro->hv);
2170}
2171
2172static void
2173coro_call_on_destroy (pTHX_ struct coro *coro)
2174{
2175 AV *od = coro->on_destroy;
2176
2177 if (!od)
2178 return;
2179
2180 while (AvFILLp (od) >= 0)
2181 {
2182 SV *cb = sv_2mortal (av_pop (od));
2183
2184 /* coro hv's (and only hv's at the moment) are supported as well */
2185 if (SvSTATEhv_p (aTHX_ cb))
2186 api_ready (aTHX_ cb);
2187 else
2188 {
2189 dSP; /* don't disturb outer sp */
2190 PUSHMARK (SP);
2191
2192 if (coro->status)
2193 {
2194 PUTBACK;
2195 coro_push_av (aTHX_ coro->status, G_ARRAY);
2196 SPAGAIN;
2197 }
2198
2199 PUTBACK;
2200 call_sv (cb, G_VOID | G_DISCARD);
2201 }
2202 }
2203}
2204
2205static void
2206coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2207{
2208 AV *av;
2209
2210 if (coro->status)
2211 {
2212 av = coro->status;
2213 av_clear (av);
2214 }
2215 else
2216 av = coro->status = newAV ();
2217
2218 /* items are actually not so common, so optimise for this case */
2219 if (items)
2220 {
2221 int i;
2222
2223 av_extend (av, items - 1);
2224
2225 for (i = 0; i < items; ++i)
2226 av_push (av, SvREFCNT_inc_NN (arg [i]));
2227 }
2228}
2229
2230static void
2231slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2232{
2233 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2234 api_ready (aTHX_ sv_manager);
2235
2236 frame->prepare = prepare_schedule;
2237 frame->check = slf_check_repeat;
2238
2239 /* as a minor optimisation, we could unwind all stacks here */
2240 /* but that puts extra pressure on pp_slf, and is not worth much */
2241 /*coro_unwind_stacks (aTHX);*/
2242}
2243
2244static void
2245slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2246{
2247 HV *coro_hv = (HV *)SvRV (coro_current);
2248
2249 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2250 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2251}
2252
2253static void
2254slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2255{
2256 HV *coro_hv;
2257 struct coro *coro;
2258
2259 if (items <= 0)
2260 croak ("Coro::cancel called without coro object,");
2261
2262 coro = SvSTATE (arg [0]);
2263 coro_hv = coro->hv;
2264
2265 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2266
2267 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2268 {
2269 /* coro currently busy cancelling something, so just notify it */
2270 coro->slf_frame.data = (void *)coro;
2271
2272 frame->prepare = prepare_nop;
2273 frame->check = slf_check_nop;
2274 }
2275 else if (coro_hv == (HV *)SvRV (coro_current))
2276 {
2277 /* cancelling the current coro is allowed, and equals terminate */
2278 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2279 }
2280 else
2281 {
2282 struct coro *self = SvSTATE_current;
2283
2284 /* otherwise we cancel directly, purely for speed reasons
2285 * unfortunately, this requires some magic trickery, as
2286 * somebody else could cancel us, so we have to fight the cancellation.
2287 * this is ugly, and hopefully fully worth the extra speed.
2288 * besides, I can't get the slow-but-safe version working...
2289 */
2290 slf_frame.data = 0;
2291 self->flags |= CF_NOCANCEL;
2292 coro_state_destroy (aTHX_ coro);
2293 self->flags &= ~CF_NOCANCEL;
2294
2295 if (slf_frame.data)
2296 {
2297 /* while we were busy we have been cancelled, so terminate */
2298 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2299 }
2300 else
2301 {
2302 frame->prepare = prepare_nop;
2303 frame->check = slf_check_nop;
2304 }
2305 }
2306}
2307
2308static int
2309slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2310{
2311 frame->prepare = 0;
2312 coro_unwind_stacks (aTHX);
2313
2314 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2315
2316 return 1;
2317}
2318
2319static int
2320safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2321{
2322 if (coro->cctx)
2323 croak ("coro inside C callback, unable to cancel at this time, caught");
2324
2325 if (coro->flags & CF_NEW)
2326 {
2327 coro_set_status (aTHX_ coro, arg, items);
2328 coro_state_destroy (aTHX_ coro);
2329 }
2330 else
2331 {
2332 if (!coro->slf_frame.prepare)
2333 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2334
2335 slf_destroy (aTHX_ coro);
2336
2337 coro_set_status (aTHX_ coro, arg, items);
2338 coro->slf_frame.prepare = prepare_nop;
2339 coro->slf_frame.check = slf_check_safe_cancel;
2340
2341 api_ready (aTHX_ (SV *)coro->hv);
2342 }
2343
2344 return 1;
2345}
2346
2347/*****************************************************************************/
2348/* async pool handler */
2349
2350static int
2351slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2352{
2353 HV *hv = (HV *)SvRV (coro_current);
2354 struct coro *coro = (struct coro *)frame->data;
2355
2356 if (!coro->invoke_cb)
2357 return 1; /* loop till we have invoke */
2358 else
2359 {
2360 hv_store (hv, "desc", sizeof ("desc") - 1,
2361 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2362
2363 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2364
2365 {
2366 dSP;
2367 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2368 PUTBACK;
2369 }
2370
2371 SvREFCNT_dec (GvAV (PL_defgv));
2372 GvAV (PL_defgv) = coro->invoke_av;
2373 coro->invoke_av = 0;
2374
2375 return 0;
2376 }
2377}
2378
2379static void
2380slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2381{
2382 HV *hv = (HV *)SvRV (coro_current);
2383 struct coro *coro = SvSTATE_hv ((SV *)hv);
2384
2385 if (ecb_expect_true (coro->saved_deffh))
2386 {
2387 /* subsequent iteration */
2388 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2389 coro->saved_deffh = 0;
2390
2391 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2392 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2393 {
2394 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2395 return;
2396 }
2397 else
2398 {
2399 av_clear (GvAV (PL_defgv));
2400 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2401
2402 coro->prio = 0;
2403
2404 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2405 api_trace (aTHX_ coro_current, 0);
2406
2407 frame->prepare = prepare_schedule;
2408 av_push (av_async_pool, SvREFCNT_inc (hv));
2409 }
2410 }
2411 else
2412 {
2413 /* first iteration, simply fall through */
2414 frame->prepare = prepare_nop;
2415 }
2416
2417 frame->check = slf_check_pool_handler;
2418 frame->data = (void *)coro;
2419}
2420
2421/*****************************************************************************/
2422/* rouse callback */
2423
2424#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2425
2426static void
2427coro_rouse_callback (pTHX_ CV *cv)
2428{
2429 dXSARGS;
2430 SV *data = (SV *)S_GENSUB_ARG;
2431
2432 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2433 {
2434 /* first call, set args */
2435 SV *coro = SvRV (data);
2436 AV *av = newAV ();
2437
2438 SvRV_set (data, (SV *)av);
2439
2440 /* better take a full copy of the arguments */
2441 while (items--)
2442 av_store (av, items, newSVsv (ST (items)));
2443
2444 api_ready (aTHX_ coro);
2445 SvREFCNT_dec (coro);
2446 }
2447
2448 XSRETURN_EMPTY;
2449}
2450
2451static int
2452slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2453{
2454 SV *data = (SV *)frame->data;
2455
2456 if (CORO_THROW)
2457 return 0;
2458
2459 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2460 return 1;
2461
2462 /* now push all results on the stack */
2463 {
2464 dSP;
2465 AV *av = (AV *)SvRV (data);
2466 int i;
2467
2468 EXTEND (SP, AvFILLp (av) + 1);
2469 for (i = 0; i <= AvFILLp (av); ++i)
2470 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2471
2472 /* we have stolen the elements, so set length to zero and free */
2473 AvFILLp (av) = -1;
2474 av_undef (av);
2475
2476 PUTBACK;
2477 }
2478
2479 return 0;
2480}
2481
2482static void
2483slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2484{
2485 SV *cb;
2486
2487 if (items)
2488 cb = arg [0];
2489 else
2490 {
2491 struct coro *coro = SvSTATE_current;
2492
2493 if (!coro->rouse_cb)
2494 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2495
2496 cb = sv_2mortal (coro->rouse_cb);
2497 coro->rouse_cb = 0;
2498 }
2499
2500 if (!SvROK (cb)
2501 || SvTYPE (SvRV (cb)) != SVt_PVCV
2502 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2503 croak ("Coro::rouse_wait called with illegal callback argument,");
2504
2505 {
2506 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2507 SV *data = (SV *)S_GENSUB_ARG;
2508
2509 frame->data = (void *)data;
2510 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2511 frame->check = slf_check_rouse_wait;
2512 }
2513}
2514
2515static SV *
2516coro_new_rouse_cb (pTHX)
2517{
2518 HV *hv = (HV *)SvRV (coro_current);
2519 struct coro *coro = SvSTATE_hv (hv);
2520 SV *data = newRV_inc ((SV *)hv);
2521 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2522
2523 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2524 SvREFCNT_dec (data); /* magicext increases the refcount */
2525
2526 SvREFCNT_dec (coro->rouse_cb);
2527 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2528
2529 return cb;
2530}
2531
2532/*****************************************************************************/
2533/* schedule-like-function opcode (SLF) */
2534
2535static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2536static const CV *slf_cv;
2537static SV **slf_argv;
2538static int slf_argc, slf_arga; /* count, allocated */
2539static I32 slf_ax; /* top of stack, for restore */
2540
2541/* this restores the stack in the case we patched the entersub, to */
2542/* recreate the stack frame as perl will on following calls */
2543/* since entersub cleared the stack */
2544static OP *
2545pp_restore (pTHX)
2546{
2547 int i;
2548 SV **SP = PL_stack_base + slf_ax;
2549
2550 PUSHMARK (SP);
2551
2552 EXTEND (SP, slf_argc + 1);
2553
2554 for (i = 0; i < slf_argc; ++i)
2555 PUSHs (sv_2mortal (slf_argv [i]));
2556
2557 PUSHs ((SV *)CvGV (slf_cv));
2558
2559 RETURNOP (slf_restore.op_first);
2560}
2561
2562static void
2563slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2564{
2565 SV **arg = (SV **)slf_frame.data;
2566
2567 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2568}
2569
2570static void
2571slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2572{
2573 if (items != 2)
2574 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2575
2576 frame->prepare = slf_prepare_transfer;
2577 frame->check = slf_check_nop;
2578 frame->data = (void *)arg; /* let's hope it will stay valid */
2579}
2580
2581static void
2582slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2583{
2584 frame->prepare = prepare_schedule;
2585 frame->check = slf_check_nop;
2586}
2587
2588static void
2589slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2590{
2591 struct coro *next = (struct coro *)slf_frame.data;
2592
2593 SvREFCNT_inc_NN (next->hv);
2594 prepare_schedule_to (aTHX_ ta, next);
2595}
2596
2597static void
2598slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2599{
2600 if (!items)
2601 croak ("Coro::schedule_to expects a coroutine argument, caught");
2602
2603 frame->data = (void *)SvSTATE (arg [0]);
2604 frame->prepare = slf_prepare_schedule_to;
2605 frame->check = slf_check_nop;
2606}
2607
2608static void
2609slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2610{
2611 api_ready (aTHX_ SvRV (coro_current));
2612
2613 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2614}
2615
2616static void
2617slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2618{
2619 frame->prepare = prepare_cede;
2620 frame->check = slf_check_nop;
2621}
2622
2623static void
2624slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2625{
2626 frame->prepare = prepare_cede_notself;
2627 frame->check = slf_check_nop;
2628}
2629
2630/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2631static void
2632slf_destroy (pTHX_ struct coro *coro)
2633{
2634 /* this callback is reserved for slf functions needing to do cleanup */
2635 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2636 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2637
2638 /*
2639 * The on_destroy above most likely is from an SLF call.
2640 * Since by definition the SLF call will not finish when we destroy
2641 * the coro, we will have to force-finish it here, otherwise
2642 * cleanup functions cannot call SLF functions.
2643 */
2644 coro->slf_frame.prepare = 0;
2645}
2646
2647/*
2648 * these not obviously related functions are all rolled into one
2649 * function to increase chances that they all will call transfer with the same
2650 * stack offset
2651 * SLF stands for "schedule-like-function".
2652 */
2653static OP *
2654pp_slf (pTHX)
2655{
2656 I32 checkmark; /* mark SP to see how many elements check has pushed */
2657
2658 /* set up the slf frame, unless it has already been set-up */
2659 /* the latter happens when a new coro has been started */
2660 /* or when a new cctx was attached to an existing coroutine */
2661 if (ecb_expect_true (!slf_frame.prepare))
2662 {
2663 /* first iteration */
2664 dSP;
2665 SV **arg = PL_stack_base + TOPMARK + 1;
2666 int items = SP - arg; /* args without function object */
2667 SV *gv = *sp;
2668
2669 /* do a quick consistency check on the "function" object, and if it isn't */
2670 /* for us, divert to the real entersub */
2671 if (SvTYPE (gv) != SVt_PVGV
2672 || !GvCV (gv)
2673 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2674 return PL_ppaddr[OP_ENTERSUB](aTHX);
2675
2676 if (!(PL_op->op_flags & OPf_STACKED))
2677 {
2678 /* ampersand-form of call, use @_ instead of stack */
2679 AV *av = GvAV (PL_defgv);
2680 arg = AvARRAY (av);
2681 items = AvFILLp (av) + 1;
2682 }
2683
2684 /* now call the init function, which needs to set up slf_frame */
2685 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2686 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2687
2688 /* pop args */
2689 SP = PL_stack_base + POPMARK;
2690
2691 PUTBACK;
2692 }
2693
2694 /* now that we have a slf_frame, interpret it! */
2695 /* we use a callback system not to make the code needlessly */
2696 /* complicated, but so we can run multiple perl coros from one cctx */
2697
2698 do
2699 {
2700 struct coro_transfer_args ta;
2701
2702 slf_frame.prepare (aTHX_ &ta);
2703 TRANSFER (ta, 0);
2704
2705 checkmark = PL_stack_sp - PL_stack_base;
2706 }
2707 while (slf_frame.check (aTHX_ &slf_frame));
2708
2709 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2710
2711 /* exception handling */
2712 if (ecb_expect_false (CORO_THROW))
2713 {
2714 SV *exception = sv_2mortal (CORO_THROW);
2715
2716 CORO_THROW = 0;
2717 sv_setsv (ERRSV, exception);
2718 croak (0);
2719 }
2720
2721 /* return value handling - mostly like entersub */
2722 /* make sure we put something on the stack in scalar context */
2723 if (GIMME_V == G_SCALAR
2724 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2725 {
2726 dSP;
2727 SV **bot = PL_stack_base + checkmark;
2728
2729 if (sp == bot) /* too few, push undef */
2730 bot [1] = &PL_sv_undef;
2731 else /* too many, take last one */
2732 bot [1] = *sp;
2733
2734 SP = bot + 1;
2735
2736 PUTBACK;
2737 }
2738
2739 return NORMAL;
2740}
2741
2742static void
2743api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2744{
2745 int i;
2746 SV **arg = PL_stack_base + ax;
2747 int items = PL_stack_sp - arg + 1;
2748
2749 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2750
2751 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2752 && PL_op->op_ppaddr != pp_slf)
2753 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2754
2755 CvFLAGS (cv) |= CVf_SLF;
2756 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2757 slf_cv = cv;
2758
2759 /* we patch the op, and then re-run the whole call */
2760 /* we have to put the same argument on the stack for this to work */
2761 /* and this will be done by pp_restore */
2762 slf_restore.op_next = (OP *)&slf_restore;
2763 slf_restore.op_type = OP_CUSTOM;
2764 slf_restore.op_ppaddr = pp_restore;
2765 slf_restore.op_first = PL_op;
2766
2767 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2768
2769 if (PL_op->op_flags & OPf_STACKED)
2770 {
2771 if (items > slf_arga)
2772 {
2773 slf_arga = items;
2774 Safefree (slf_argv);
2775 New (0, slf_argv, slf_arga, SV *);
2776 }
2777
2778 slf_argc = items;
2779
2780 for (i = 0; i < items; ++i)
2781 slf_argv [i] = SvREFCNT_inc (arg [i]);
2782 }
2783 else
2784 slf_argc = 0;
2785
2786 PL_op->op_ppaddr = pp_slf;
2787 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2788
2789 PL_op = (OP *)&slf_restore;
2790}
2791
2792/*****************************************************************************/
2793/* dynamic wind */
2794
2795static void
2796on_enterleave_call (pTHX_ SV *cb)
2797{
2798 dSP;
2799
2800 PUSHSTACK;
2801
2802 PUSHMARK (SP);
2803 PUTBACK;
2804 call_sv (cb, G_VOID | G_DISCARD);
2805 SPAGAIN;
2806
2807 POPSTACK;
2808}
2809
2810static SV *
2811coro_avp_pop_and_free (pTHX_ AV **avp)
2812{
2813 AV *av = *avp;
2814 SV *res = av_pop (av);
2815
2816 if (AvFILLp (av) < 0)
2817 {
2818 *avp = 0;
2819 SvREFCNT_dec (av);
2820 }
2821
2822 return res;
2823}
2824
2825static void
2826coro_pop_on_enter (pTHX_ void *coro)
2827{
2828 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2829 SvREFCNT_dec (cb);
2830}
2831
2832static void
2833coro_pop_on_leave (pTHX_ void *coro)
2834{
2835 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2836 on_enterleave_call (aTHX_ sv_2mortal (cb));
2837}
2838
2839/*****************************************************************************/
2840/* PerlIO::cede */
2841
2842typedef struct
2843{
2844 PerlIOBuf base;
2845 NV next, every;
2846} PerlIOCede;
2847
2848static IV ecb_cold
2849PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2850{
2851 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2852
2853 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2854 self->next = nvtime () + self->every;
2855
2856 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2857}
2858
2859static SV * ecb_cold
2860PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2861{
2862 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2863
2864 return newSVnv (self->every);
2865}
2866
2867static IV
2868PerlIOCede_flush (pTHX_ PerlIO *f)
2869{
2870 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2871 double now = nvtime ();
2872
2873 if (now >= self->next)
2874 {
2875 api_cede (aTHX);
2876 self->next = now + self->every;
2877 }
2878
2879 return PerlIOBuf_flush (aTHX_ f);
2880}
2881
2882static PerlIO_funcs PerlIO_cede =
2883{
2884 sizeof(PerlIO_funcs),
2885 "cede",
2886 sizeof(PerlIOCede),
2887 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2888 PerlIOCede_pushed,
2889 PerlIOBuf_popped,
2890 PerlIOBuf_open,
2891 PerlIOBase_binmode,
2892 PerlIOCede_getarg,
2893 PerlIOBase_fileno,
2894 PerlIOBuf_dup,
2895 PerlIOBuf_read,
2896 PerlIOBuf_unread,
2897 PerlIOBuf_write,
2898 PerlIOBuf_seek,
2899 PerlIOBuf_tell,
2900 PerlIOBuf_close,
2901 PerlIOCede_flush,
2902 PerlIOBuf_fill,
2903 PerlIOBase_eof,
2904 PerlIOBase_error,
2905 PerlIOBase_clearerr,
2906 PerlIOBase_setlinebuf,
2907 PerlIOBuf_get_base,
2908 PerlIOBuf_bufsiz,
2909 PerlIOBuf_get_ptr,
2910 PerlIOBuf_get_cnt,
2911 PerlIOBuf_set_ptrcnt,
2912};
2913
2914/*****************************************************************************/
2915/* Coro::Semaphore & Coro::Signal */
2916
2917static SV *
2918coro_waitarray_new (pTHX_ int count)
2919{
2920 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2921 AV *av = newAV ();
2922 SV **ary;
2923
2924 /* unfortunately, building manually saves memory */
2925 Newx (ary, 2, SV *);
2926 AvALLOC (av) = ary;
2927#if PERL_VERSION_ATLEAST (5,10,0)
2928 AvARRAY (av) = ary;
2929#else
2930 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2931 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2932 SvPVX ((SV *)av) = (char *)ary;
2933#endif
2934 AvMAX (av) = 1;
2935 AvFILLp (av) = 0;
2936 ary [0] = newSViv (count);
2937
2938 return newRV_noinc ((SV *)av);
2939}
2940
2941/* semaphore */
2942
2943static void
2944coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2945{
2946 SV *count_sv = AvARRAY (av)[0];
2947 IV count = SvIVX (count_sv);
2948
2949 count += adjust;
2950 SvIVX (count_sv) = count;
2951
2952 /* now wake up as many waiters as are expected to lock */
2953 while (count > 0 && AvFILLp (av) > 0)
2954 {
2955 SV *cb;
2956
2957 /* swap first two elements so we can shift a waiter */
2958 AvARRAY (av)[0] = AvARRAY (av)[1];
2959 AvARRAY (av)[1] = count_sv;
2960 cb = av_shift (av);
2961
2962 if (SvOBJECT (cb))
2963 {
2964 api_ready (aTHX_ cb);
2965 --count;
2966 }
2967 else if (SvTYPE (cb) == SVt_PVCV)
1049 { 2968 {
1050 dSP; 2969 dSP;
1051 UNLOCK;
1052
1053 ENTER;
1054 SAVETMPS;
1055
1056 PUSHMARK (SP); 2970 PUSHMARK (SP);
2971 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1057 PUTBACK; 2972 PUTBACK;
1058 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 2973 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1059
1060 FREETMPS;
1061 LEAVE;
1062 continue;
1063 } 2974 }
1064 2975
1065 ta->next = SvSTATE (next_sv); 2976 SvREFCNT_dec (cb);
2977 }
2978}
1066 2979
1067 /* cannot transfer to destroyed coros, skip and look for next */ 2980static void
1068 if (ta->next->flags & CF_DESTROYED) 2981coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2982{
2983 /* call $sem->adjust (0) to possibly wake up some other waiters */
2984 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2985}
2986
2987static int
2988slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2989{
2990 AV *av = (AV *)frame->data;
2991 SV *count_sv = AvARRAY (av)[0];
2992 SV *coro_hv = SvRV (coro_current);
2993
2994 /* if we are about to throw, don't actually acquire the lock, just throw */
2995 if (CORO_THROW)
2996 return 0;
2997 else if (SvIVX (count_sv) > 0)
2998 {
2999 frame->destroy = 0;
3000
3001 if (acquire)
3002 SvIVX (count_sv) = SvIVX (count_sv) - 1;
3003 else
3004 coro_semaphore_adjust (aTHX_ av, 0);
3005
3006 return 0;
3007 }
3008 else
3009 {
3010 int i;
3011 /* if we were woken up but can't down, we look through the whole */
3012 /* waiters list and only add us if we aren't in there already */
3013 /* this avoids some degenerate memory usage cases */
3014 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
3015 if (AvARRAY (av)[i] == coro_hv)
3016 return 1;
3017
3018 av_push (av, SvREFCNT_inc (coro_hv));
3019 return 1;
3020 }
3021}
3022
3023static int
3024slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
3025{
3026 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
3027}
3028
3029static int
3030slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
3031{
3032 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3033}
3034
3035static void
3036slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3037{
3038 AV *av = (AV *)SvRV (arg [0]);
3039
3040 if (SvIVX (AvARRAY (av)[0]) > 0)
3041 {
3042 frame->data = (void *)av;
3043 frame->prepare = prepare_nop;
3044 }
3045 else
3046 {
3047 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3048
3049 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3050 frame->prepare = prepare_schedule;
3051 /* to avoid race conditions when a woken-up coro gets terminated */
3052 /* we arrange for a temporary on_destroy that calls adjust (0) */
3053 frame->destroy = coro_semaphore_destroy;
3054 }
3055}
3056
3057static void
3058slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3059{
3060 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3061 frame->check = slf_check_semaphore_down;
3062}
3063
3064static void
3065slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3066{
3067 if (items >= 2)
3068 {
3069 /* callback form */
3070 AV *av = (AV *)SvRV (arg [0]);
3071 SV *cb_cv = s_get_cv_croak (arg [1]);
3072
3073 av_push (av, SvREFCNT_inc_NN (cb_cv));
3074
3075 if (SvIVX (AvARRAY (av)[0]) > 0)
3076 coro_semaphore_adjust (aTHX_ av, 0);
3077
3078 frame->prepare = prepare_nop;
3079 frame->check = slf_check_nop;
3080 }
3081 else
3082 {
3083 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3084 frame->check = slf_check_semaphore_wait;
3085 }
3086}
3087
3088/* signal */
3089
3090static void
3091coro_signal_wake (pTHX_ AV *av, int count)
3092{
3093 SvIVX (AvARRAY (av)[0]) = 0;
3094
3095 /* now signal count waiters */
3096 while (count > 0 && AvFILLp (av) > 0)
3097 {
3098 SV *cb;
3099
3100 /* swap first two elements so we can shift a waiter */
3101 cb = AvARRAY (av)[0];
3102 AvARRAY (av)[0] = AvARRAY (av)[1];
3103 AvARRAY (av)[1] = cb;
3104
3105 cb = av_shift (av);
3106
3107 if (SvTYPE (cb) == SVt_PVCV)
1069 { 3108 {
3109 dSP;
3110 PUSHMARK (SP);
3111 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1070 UNLOCK; 3112 PUTBACK;
1071 SvREFCNT_dec (next_sv); 3113 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1072 /* coro_nready is already taken care of by destroy */
1073 continue;
1074 } 3114 }
3115 else
3116 {
3117 api_ready (aTHX_ cb);
3118 sv_setiv (cb, 0); /* signal waiter */
3119 }
1075 3120
1076 --coro_nready; 3121 SvREFCNT_dec (cb);
1077 UNLOCK;
1078 break;
1079 }
1080 3122
1081 /* free this only after the transfer */ 3123 --count;
1082 prev_sv = SvRV (coro_current); 3124 }
1083 SvRV_set (coro_current, next_sv);
1084 ta->prev = SvSTATE (prev_sv);
1085
1086 assert (ta->next->flags & CF_READY);
1087 ta->next->flags &= ~CF_READY;
1088
1089 LOCK;
1090 free_coro_mortal (aTHX);
1091 coro_mortal = prev_sv;
1092 UNLOCK;
1093}
1094
1095static void
1096prepare_cede (pTHX_ struct transfer_args *ta)
1097{
1098 api_ready (coro_current);
1099 prepare_schedule (aTHX_ ta);
1100} 3125}
1101 3126
1102static int 3127static int
1103prepare_cede_notself (pTHX_ struct transfer_args *ta) 3128slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
1104{ 3129{
1105 if (coro_nready) 3130 /* if we are about to throw, also stop waiting */
3131 return SvROK ((SV *)frame->data) && !CORO_THROW;
3132}
3133
3134static void
3135slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3136{
3137 AV *av = (AV *)SvRV (arg [0]);
3138
3139 if (items >= 2)
3140 {
3141 SV *cb_cv = s_get_cv_croak (arg [1]);
3142 av_push (av, SvREFCNT_inc_NN (cb_cv));
3143
3144 if (SvIVX (AvARRAY (av)[0]))
3145 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3146
3147 frame->prepare = prepare_nop;
3148 frame->check = slf_check_nop;
1106 { 3149 }
1107 SV *prev = SvRV (coro_current); 3150 else if (SvIVX (AvARRAY (av)[0]))
1108 prepare_schedule (aTHX_ ta); 3151 {
1109 api_ready (prev); 3152 SvIVX (AvARRAY (av)[0]) = 0;
1110 return 1; 3153 frame->prepare = prepare_nop;
3154 frame->check = slf_check_nop;
1111 } 3155 }
1112 else 3156 else
3157 {
3158 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3159
3160 av_push (av, waiter);
3161
3162 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3163 frame->prepare = prepare_schedule;
3164 frame->check = slf_check_signal_wait;
3165 }
3166}
3167
3168/*****************************************************************************/
3169/* Coro::AIO */
3170
3171#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3172
3173/* helper storage struct */
3174struct io_state
3175{
3176 int errorno;
3177 I32 laststype; /* U16 in 5.10.0 */
3178 int laststatval;
3179 Stat_t statcache;
3180};
3181
3182static void
3183coro_aio_callback (pTHX_ CV *cv)
3184{
3185 dXSARGS;
3186 AV *state = (AV *)S_GENSUB_ARG;
3187 SV *coro = av_pop (state);
3188 SV *data_sv = newSV (sizeof (struct io_state));
3189
3190 av_extend (state, items - 1);
3191
3192 sv_upgrade (data_sv, SVt_PV);
3193 SvCUR_set (data_sv, sizeof (struct io_state));
3194 SvPOK_only (data_sv);
3195
3196 {
3197 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3198
3199 data->errorno = errno;
3200 data->laststype = PL_laststype;
3201 data->laststatval = PL_laststatval;
3202 data->statcache = PL_statcache;
3203 }
3204
3205 /* now build the result vector out of all the parameters and the data_sv */
3206 {
3207 int i;
3208
3209 for (i = 0; i < items; ++i)
3210 av_push (state, SvREFCNT_inc_NN (ST (i)));
3211 }
3212
3213 av_push (state, data_sv);
3214
3215 api_ready (aTHX_ coro);
3216 SvREFCNT_dec (coro);
3217 SvREFCNT_dec ((AV *)state);
3218}
3219
3220static int
3221slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3222{
3223 AV *state = (AV *)frame->data;
3224
3225 /* if we are about to throw, return early */
3226 /* this does not cancel the aio request, but at least */
3227 /* it quickly returns */
3228 if (CORO_THROW)
1113 return 0; 3229 return 0;
1114}
1115 3230
1116static void 3231 /* one element that is an RV? repeat! */
1117api_schedule (void) 3232 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
1118{
1119 dTHX;
1120 struct transfer_args ta;
1121
1122 prepare_schedule (aTHX_ &ta);
1123 TRANSFER (ta);
1124}
1125
1126static int
1127api_cede (void)
1128{
1129 dTHX;
1130 struct transfer_args ta;
1131
1132 prepare_cede (aTHX_ &ta);
1133
1134 if (ta.prev != ta.next)
1135 {
1136 TRANSFER (ta);
1137 return 1; 3233 return 1;
3234
3235 /* restore status */
3236 {
3237 SV *data_sv = av_pop (state);
3238 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3239
3240 errno = data->errorno;
3241 PL_laststype = data->laststype;
3242 PL_laststatval = data->laststatval;
3243 PL_statcache = data->statcache;
3244
3245 SvREFCNT_dec (data_sv);
1138 } 3246 }
1139 else 3247
3248 /* push result values */
3249 {
3250 dSP;
3251 int i;
3252
3253 EXTEND (SP, AvFILLp (state) + 1);
3254 for (i = 0; i <= AvFILLp (state); ++i)
3255 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3256
3257 PUTBACK;
3258 }
3259
1140 return 0; 3260 return 0;
1141} 3261}
1142 3262
1143static int 3263static void
1144api_cede_notself (void) 3264slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1145{ 3265{
1146 dTHX; 3266 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
1147 struct transfer_args ta; 3267 SV *coro_hv = SvRV (coro_current);
3268 struct coro *coro = SvSTATE_hv (coro_hv);
1148 3269
1149 if (prepare_cede_notself (aTHX_ &ta)) 3270 /* put our coroutine id on the state arg */
1150 { 3271 av_push (state, SvREFCNT_inc_NN (coro_hv));
1151 TRANSFER (ta); 3272
1152 return 1; 3273 /* first see whether we have a non-zero priority and set it as AIO prio */
3274 if (coro->prio)
1153 } 3275 {
1154 else 3276 dSP;
1155 return 0;
1156}
1157 3277
3278 static SV *prio_cv;
3279 static SV *prio_sv;
3280
3281 if (ecb_expect_false (!prio_cv))
3282 {
3283 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3284 prio_sv = newSViv (0);
3285 }
3286
3287 PUSHMARK (SP);
3288 sv_setiv (prio_sv, coro->prio);
3289 XPUSHs (prio_sv);
3290
3291 PUTBACK;
3292 call_sv (prio_cv, G_VOID | G_DISCARD);
3293 }
3294
3295 /* now call the original request */
3296 {
3297 dSP;
3298 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3299 int i;
3300
3301 PUSHMARK (SP);
3302
3303 /* first push all args to the stack */
3304 EXTEND (SP, items + 1);
3305
3306 for (i = 0; i < items; ++i)
3307 PUSHs (arg [i]);
3308
3309 /* now push the callback closure */
3310 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3311
3312 /* now call the AIO function - we assume our request is uncancelable */
3313 PUTBACK;
3314 call_sv ((SV *)req, G_VOID | G_DISCARD);
3315 }
3316
3317 /* now that the request is going, we loop till we have a result */
3318 frame->data = (void *)state;
3319 frame->prepare = prepare_schedule;
3320 frame->check = slf_check_aio_req;
3321}
3322
3323static void
3324coro_aio_req_xs (pTHX_ CV *cv)
3325{
3326 dXSARGS;
3327
3328 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3329
3330 XSRETURN_EMPTY;
3331}
3332
3333/*****************************************************************************/
3334
3335#if CORO_CLONE
3336# include "clone.c"
3337#endif
3338
3339/*****************************************************************************/
3340
3341static SV *
3342coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3343{
3344 SV *coro_sv;
3345 struct coro *coro;
3346 MAGIC *mg;
3347 HV *hv;
3348 SV *cb;
3349 int i;
3350
3351 if (argc > 0)
3352 {
3353 cb = s_get_cv_croak (argv [0]);
3354
3355 if (!is_coro)
3356 {
3357 if (CvISXSUB (cb))
3358 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3359
3360 if (!CvROOT (cb))
3361 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3362 }
3363 }
3364
3365 Newz (0, coro, 1, struct coro);
3366 coro->args = newAV ();
3367 coro->flags = CF_NEW;
3368
3369 if (coro_first) coro_first->prev = coro;
3370 coro->next = coro_first;
3371 coro_first = coro;
3372
3373 coro->hv = hv = newHV ();
3374 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3375 mg->mg_flags |= MGf_DUP;
3376 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3377
3378 if (argc > 0)
3379 {
3380 av_extend (coro->args, argc + is_coro - 1);
3381
3382 if (is_coro)
3383 {
3384 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3385 cb = (SV *)cv_coro_run;
3386 }
3387
3388 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3389
3390 for (i = 1; i < argc; i++)
3391 av_push (coro->args, newSVsv (argv [i]));
3392 }
3393
3394 return coro_sv;
3395}
3396
3397#ifndef __cplusplus
3398ecb_cold XS(boot_Coro__State);
3399#endif
3400
3401#if CORO_JIT
3402
3403static void ecb_noinline ecb_cold
3404pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3405{
3406 dSP;
3407 AV *av = newAV ();
3408
3409 av_store (av, 3, newSVuv (d));
3410 av_store (av, 2, newSVuv (c));
3411 av_store (av, 1, newSVuv (b));
3412 av_store (av, 0, newSVuv (a));
3413
3414 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3415
3416 PUTBACK;
3417}
3418
3419static void ecb_noinline ecb_cold
3420jit_init (pTHX)
3421{
3422 dSP;
3423 SV *load, *save;
3424 char *map_base;
3425 char *load_ptr, *save_ptr;
3426 STRLEN load_len, save_len, map_len;
3427 int count;
3428
3429 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3430
3431 PUSHMARK (SP);
3432 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3433 #include "state.h"
3434 count = call_pv ("Coro::State::_jit", G_ARRAY);
3435 SPAGAIN;
3436
3437 save = POPs; save_ptr = SvPVbyte (save, save_len);
3438 load = POPs; load_ptr = SvPVbyte (load, load_len);
3439
3440 map_len = load_len + save_len + 16;
3441
3442 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3443
3444 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3445
3446 load_perl_slots = (load_save_perl_slots_type)map_base;
3447 memcpy (map_base, load_ptr, load_len);
3448
3449 map_base += (load_len + 15) & ~15;
3450
3451 save_perl_slots = (load_save_perl_slots_type)map_base;
3452 memcpy (map_base, save_ptr, save_len);
3453
3454 /* we are good citizens and try to make the page read-only, so the evil evil */
3455 /* hackers might have it a bit more difficult */
3456 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3457
3458 PUTBACK;
3459 eval_pv ("undef &Coro::State::_jit", 1);
3460}
3461
3462#endif
3463
1158MODULE = Coro::State PACKAGE = Coro::State 3464MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1159 3465
1160PROTOTYPES: DISABLE 3466PROTOTYPES: DISABLE
1161 3467
1162BOOT: 3468BOOT:
1163{ 3469{
1164#ifdef USE_ITHREADS 3470#ifdef USE_ITHREADS
1165 MUTEX_INIT (&coro_mutex); 3471# if CORO_PTHREAD
3472 coro_thx = PERL_GET_CONTEXT;
3473# endif
1166#endif 3474#endif
1167 BOOT_PAGESIZE; 3475 BOOT_PAGESIZE;
1168 3476
3477 /* perl defines these to check for existance first, but why it doesn't */
3478 /* just create them one at init time is not clear to me, except for */
3479 /* programs trying to delete them, but... */
3480 /* anyway, we declare this as invalid and make sure they are initialised here */
3481 DEFSV;
3482 ERRSV;
3483
3484 cctx_current = cctx_new_empty ();
3485
3486 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3487 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3488
3489 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3490 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3491 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3492
3493 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3494 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3495 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3496
1169 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3497 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1170 3498
1171 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 3499 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1172 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV)); 3500 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1173 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1174 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1175 newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
1176 newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF)); 3501 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1177 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 3502 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1178 3503
1179 main_mainstack = PL_mainstack; 3504 main_mainstack = PL_mainstack;
3505 main_top_env = PL_top_env;
1180 3506
3507 while (main_top_env->je_prev)
3508 main_top_env = main_top_env->je_prev;
3509
3510 {
3511 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3512
3513 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3514 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3515
3516 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3517 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3518 }
3519
1181 coroapi.ver = CORO_API_VERSION; 3520 coroapi.ver = CORO_API_VERSION;
3521 coroapi.rev = CORO_API_REVISION;
3522
1182 coroapi.transfer = api_transfer; 3523 coroapi.transfer = api_transfer;
1183 3524
3525 coroapi.sv_state = SvSTATE_;
3526 coroapi.execute_slf = api_execute_slf;
3527 coroapi.prepare_nop = prepare_nop;
3528 coroapi.prepare_schedule = prepare_schedule;
3529 coroapi.prepare_cede = prepare_cede;
3530 coroapi.prepare_cede_notself = prepare_cede_notself;
3531
3532 time_init (aTHX);
3533
1184 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3534 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3535#if CORO_JIT
3536 PUTBACK;
3537 jit_init (aTHX);
3538 SPAGAIN;
3539#endif
1185} 3540}
1186 3541
1187SV * 3542SV *
1188new (char *klass, ...) 3543new (SV *klass, ...)
3544 ALIAS:
3545 Coro::new = 1
1189 CODE: 3546 CODE:
1190{ 3547 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1191 struct coro *coro;
1192 HV *hv;
1193 int i;
1194
1195 Newz (0, coro, 1, struct coro);
1196 coro->args = newAV ();
1197 coro->save = CORO_SAVE_DEF;
1198 coro->flags = CF_NEW;
1199
1200 hv = newHV ();
1201 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1202 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1203
1204 for (i = 1; i < items; i++)
1205 av_push (coro->args, newSVsv (ST (i)));
1206}
1207 OUTPUT:
1208 RETVAL
1209
1210int
1211save (SV *coro, int new_save = -1)
1212 CODE:
1213 RETVAL = api_save (coro, new_save);
1214 OUTPUT: 3548 OUTPUT:
1215 RETVAL 3549 RETVAL
1216 3550
1217int 3551void
1218save_also (SV *coro_sv, int save_also) 3552transfer (...)
3553 PROTOTYPE: $$
1219 CODE: 3554 CODE:
1220{ 3555 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1221 struct coro *coro = SvSTATE (coro_sv);
1222 RETVAL = coro->save;
1223 coro->save |= save_also;
1224}
1225 OUTPUT:
1226 RETVAL
1227 3556
1228void 3557void
1229_set_stacklevel (...)
1230 ALIAS:
1231 Coro::State::transfer = 1
1232 Coro::schedule = 2
1233 Coro::cede = 3
1234 Coro::cede_notself = 4
1235 CODE:
1236{
1237 struct transfer_args ta;
1238
1239 switch (ix)
1240 {
1241 case 0:
1242 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1243 ta.next = 0;
1244 break;
1245
1246 case 1:
1247 if (items != 2)
1248 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1249
1250 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1251 break;
1252
1253 case 2:
1254 prepare_schedule (aTHX_ &ta);
1255 break;
1256
1257 case 3:
1258 prepare_cede (aTHX_ &ta);
1259 break;
1260
1261 case 4:
1262 if (!prepare_cede_notself (aTHX_ &ta))
1263 XSRETURN_EMPTY;
1264
1265 break;
1266 }
1267
1268 BARRIER;
1269 TRANSFER (ta);
1270
1271 if (GIMME_V != G_VOID && ta.next != ta.prev)
1272 XSRETURN_YES;
1273}
1274
1275bool
1276_destroy (SV *coro_sv)
1277 CODE:
1278 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1279 OUTPUT:
1280 RETVAL
1281
1282void
1283_exit (code) 3558_exit (int code)
1284 int code
1285 PROTOTYPE: $ 3559 PROTOTYPE: $
1286 CODE: 3560 CODE:
1287 _exit (code); 3561 _exit (code);
1288 3562
3563SV *
3564clone (Coro::State coro)
3565 CODE:
3566{
3567#if CORO_CLONE
3568 struct coro *ncoro = coro_clone (aTHX_ coro);
3569 MAGIC *mg;
3570 /* TODO: too much duplication */
3571 ncoro->hv = newHV ();
3572 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3573 mg->mg_flags |= MGf_DUP;
3574 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3575#else
3576 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3577#endif
3578}
3579 OUTPUT:
3580 RETVAL
3581
1289int 3582int
1290cctx_stacksize (int new_stacksize = 0) 3583cctx_stacksize (int new_stacksize = 0)
3584 PROTOTYPE: ;$
1291 CODE: 3585 CODE:
1292 RETVAL = coro_stacksize; 3586 RETVAL = cctx_stacksize;
1293 if (new_stacksize) 3587 if (new_stacksize)
3588 {
1294 coro_stacksize = new_stacksize; 3589 cctx_stacksize = new_stacksize;
3590 ++cctx_gen;
3591 }
1295 OUTPUT: 3592 OUTPUT:
1296 RETVAL 3593 RETVAL
1297 3594
1298int 3595int
3596cctx_max_idle (int max_idle = 0)
3597 PROTOTYPE: ;$
3598 CODE:
3599 RETVAL = cctx_max_idle;
3600 if (max_idle > 1)
3601 cctx_max_idle = max_idle;
3602 OUTPUT:
3603 RETVAL
3604
3605int
1299cctx_count () 3606cctx_count ()
3607 PROTOTYPE:
1300 CODE: 3608 CODE:
1301 RETVAL = cctx_count; 3609 RETVAL = cctx_count;
1302 OUTPUT: 3610 OUTPUT:
1303 RETVAL 3611 RETVAL
1304 3612
1305int 3613int
1306cctx_idle () 3614cctx_idle ()
3615 PROTOTYPE:
1307 CODE: 3616 CODE:
1308 RETVAL = cctx_idle; 3617 RETVAL = cctx_idle;
1309 OUTPUT: 3618 OUTPUT:
1310 RETVAL 3619 RETVAL
1311 3620
3621void
3622list ()
3623 PROTOTYPE:
3624 PPCODE:
3625{
3626 struct coro *coro;
3627 for (coro = coro_first; coro; coro = coro->next)
3628 if (coro->hv)
3629 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3630}
3631
3632void
3633call (Coro::State coro, SV *coderef)
3634 ALIAS:
3635 eval = 1
3636 CODE:
3637{
3638 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3639 {
3640 struct coro *current = SvSTATE_current;
3641 struct CoroSLF slf_save;
3642
3643 if (current != coro)
3644 {
3645 PUTBACK;
3646 save_perl (aTHX_ current);
3647 load_perl (aTHX_ coro);
3648 /* the coro is most likely in an active SLF call.
3649 * while not strictly required (the code we execute is
3650 * not allowed to call any SLF functions), it's cleaner
3651 * to reinitialise the slf_frame and restore it later.
3652 * This might one day allow us to actually do SLF calls
3653 * from code executed here.
3654 */
3655 slf_save = slf_frame;
3656 slf_frame.prepare = 0;
3657 SPAGAIN;
3658 }
3659
3660 PUSHSTACK;
3661
3662 PUSHMARK (SP);
3663 PUTBACK;
3664
3665 if (ix)
3666 eval_sv (coderef, 0);
3667 else
3668 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3669
3670 POPSTACK;
3671 SPAGAIN;
3672
3673 if (current != coro)
3674 {
3675 PUTBACK;
3676 slf_frame = slf_save;
3677 save_perl (aTHX_ coro);
3678 load_perl (aTHX_ current);
3679 SPAGAIN;
3680 }
3681 }
3682}
3683
3684SV *
3685is_ready (Coro::State coro)
3686 PROTOTYPE: $
3687 ALIAS:
3688 is_ready = CF_READY
3689 is_running = CF_RUNNING
3690 is_new = CF_NEW
3691 is_destroyed = CF_ZOMBIE
3692 is_zombie = CF_ZOMBIE
3693 is_suspended = CF_SUSPENDED
3694 CODE:
3695 RETVAL = boolSV (coro->flags & ix);
3696 OUTPUT:
3697 RETVAL
3698
3699void
3700throw (SV *self, SV *exception = &PL_sv_undef)
3701 PROTOTYPE: $;$
3702 CODE:
3703{
3704 struct coro *coro = SvSTATE (self);
3705 struct coro *current = SvSTATE_current;
3706 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3707 SvREFCNT_dec (*exceptionp);
3708 SvGETMAGIC (exception);
3709 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3710
3711 api_ready (aTHX_ self);
3712}
3713
3714void
3715api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3716 PROTOTYPE: $;$
3717 C_ARGS: aTHX_ coro, flags
3718
3719SV *
3720has_cctx (Coro::State coro)
3721 PROTOTYPE: $
3722 CODE:
3723 /* maybe manage the running flag differently */
3724 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3725 OUTPUT:
3726 RETVAL
3727
3728int
3729is_traced (Coro::State coro)
3730 PROTOTYPE: $
3731 CODE:
3732 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3733 OUTPUT:
3734 RETVAL
3735
3736UV
3737rss (Coro::State coro)
3738 PROTOTYPE: $
3739 ALIAS:
3740 usecount = 1
3741 CODE:
3742 switch (ix)
3743 {
3744 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3745 case 1: RETVAL = coro->usecount; break;
3746 }
3747 OUTPUT:
3748 RETVAL
3749
3750void
3751force_cctx ()
3752 PROTOTYPE:
3753 CODE:
3754 cctx_current->idle_sp = 0;
3755
3756void
3757swap_defsv (Coro::State self)
3758 PROTOTYPE: $
3759 ALIAS:
3760 swap_defav = 1
3761 CODE:
3762 if (!self->slot)
3763 croak ("cannot swap state with coroutine that has no saved state,");
3764 else
3765 {
3766 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3767 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3768
3769 SV *tmp = *src; *src = *dst; *dst = tmp;
3770 }
3771
3772void
3773cancel (Coro::State self)
3774 CODE:
3775 coro_state_destroy (aTHX_ self);
3776
3777SV *
3778enable_times (int enabled = enable_times)
3779 CODE:
3780{
3781 RETVAL = boolSV (enable_times);
3782
3783 if (enabled != enable_times)
3784 {
3785 enable_times = enabled;
3786
3787 coro_times_update ();
3788 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3789 }
3790}
3791 OUTPUT:
3792 RETVAL
3793
3794void
3795times (Coro::State self)
3796 PPCODE:
3797{
3798 struct coro *current = SvSTATE (coro_current);
3799
3800 if (ecb_expect_false (current == self))
3801 {
3802 coro_times_update ();
3803 coro_times_add (SvSTATE (coro_current));
3804 }
3805
3806 EXTEND (SP, 2);
3807 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3808 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3809
3810 if (ecb_expect_false (current == self))
3811 coro_times_sub (SvSTATE (coro_current));
3812}
3813
3814void
3815swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3816 CODE:
3817{
3818 struct coro *current = SvSTATE_current;
3819
3820 if (current == coro)
3821 SWAP_SVS (current);
3822
3823 if (!coro->swap_sv)
3824 coro->swap_sv = newAV ();
3825
3826 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3827 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3828
3829 if (current == coro)
3830 SWAP_SVS (current);
3831}
3832
3833
1312MODULE = Coro::State PACKAGE = Coro 3834MODULE = Coro::State PACKAGE = Coro
1313 3835
1314BOOT: 3836BOOT:
1315{ 3837{
1316 int i; 3838 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3839 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3840 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3841 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3842 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3843 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3844 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3845 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1317 3846
3847 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3848 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3849 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3850 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3851
1318 coro_stash = gv_stashpv ("Coro", TRUE); 3852 coro_stash = gv_stashpv ("Coro", TRUE);
1319 3853
1320 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3854 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1321 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3855 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1322 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3856 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1323 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3857 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1324 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3858 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1325 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3859 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1326
1327 coro_current = get_sv ("Coro::current", FALSE);
1328 SvREADONLY_on (coro_current);
1329
1330 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1331 coro_ready[i] = newAV ();
1332 3860
1333 { 3861 {
1334 SV *sv = perl_get_sv("Coro::API", 1); 3862 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1335 3863
1336 coroapi.schedule = api_schedule; 3864 coroapi.schedule = api_schedule;
1337 coroapi.save = api_save; 3865 coroapi.schedule_to = api_schedule_to;
1338 coroapi.cede = api_cede; 3866 coroapi.cede = api_cede;
1339 coroapi.cede_notself = api_cede_notself; 3867 coroapi.cede_notself = api_cede_notself;
1340 coroapi.ready = api_ready; 3868 coroapi.ready = api_ready;
1341 coroapi.is_ready = api_is_ready; 3869 coroapi.is_ready = api_is_ready;
1342 coroapi.nready = &coro_nready; 3870 coroapi.nready = coro_nready;
1343 coroapi.current = coro_current; 3871 coroapi.current = coro_current;
1344 3872
1345 GCoroAPI = &coroapi; 3873 /*GCoroAPI = &coroapi;*/
1346 sv_setiv (sv, (IV)&coroapi); 3874 sv_setiv (sv, (IV)&coroapi);
1347 SvREADONLY_on (sv); 3875 SvREADONLY_on (sv);
1348 } 3876 }
1349} 3877}
3878
3879SV *
3880async (...)
3881 PROTOTYPE: &@
3882 CODE:
3883 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3884 api_ready (aTHX_ RETVAL);
3885 OUTPUT:
3886 RETVAL
3887
3888void
3889_destroy (Coro::State coro)
3890 CODE:
3891 /* used by the manager thread */
3892 coro_state_destroy (aTHX_ coro);
3893
3894void
3895on_destroy (Coro::State coro, SV *cb)
3896 CODE:
3897 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3898
3899void
3900join (...)
3901 CODE:
3902 CORO_EXECUTE_SLF_XS (slf_init_join);
3903
3904void
3905terminate (...)
3906 CODE:
3907 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3908
3909void
3910cancel (...)
3911 CODE:
3912 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3913
3914int
3915safe_cancel (Coro::State self, ...)
3916 C_ARGS: aTHX_ self, &ST (1), items - 1
3917
3918void
3919schedule (...)
3920 CODE:
3921 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3922
3923void
3924schedule_to (...)
3925 CODE:
3926 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3927
3928void
3929cede_to (...)
3930 CODE:
3931 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3932
3933void
3934cede (...)
3935 CODE:
3936 CORO_EXECUTE_SLF_XS (slf_init_cede);
3937
3938void
3939cede_notself (...)
3940 CODE:
3941 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1350 3942
1351void 3943void
1352_set_current (SV *current) 3944_set_current (SV *current)
1353 PROTOTYPE: $ 3945 PROTOTYPE: $
1354 CODE: 3946 CODE:
1355 SvREFCNT_dec (SvRV (coro_current)); 3947 SvREFCNT_dec (SvRV (coro_current));
1356 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3948 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3949
3950void
3951_set_readyhook (SV *hook)
3952 PROTOTYPE: $
3953 CODE:
3954 SvREFCNT_dec (coro_readyhook);
3955 SvGETMAGIC (hook);
3956 if (SvOK (hook))
3957 {
3958 coro_readyhook = newSVsv (hook);
3959 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3960 }
3961 else
3962 {
3963 coro_readyhook = 0;
3964 CORO_READYHOOK = 0;
3965 }
1357 3966
1358int 3967int
1359prio (Coro::State coro, int newprio = 0) 3968prio (Coro::State coro, int newprio = 0)
3969 PROTOTYPE: $;$
1360 ALIAS: 3970 ALIAS:
1361 nice = 1 3971 nice = 1
1362 CODE: 3972 CODE:
1363{ 3973{
1364 RETVAL = coro->prio; 3974 RETVAL = coro->prio;
… …
1366 if (items > 1) 3976 if (items > 1)
1367 { 3977 {
1368 if (ix) 3978 if (ix)
1369 newprio = coro->prio - newprio; 3979 newprio = coro->prio - newprio;
1370 3980
1371 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3981 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1372 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3982 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1373 3983
1374 coro->prio = newprio; 3984 coro->prio = newprio;
1375 } 3985 }
1376} 3986}
1377 OUTPUT: 3987 OUTPUT:
… …
1379 3989
1380SV * 3990SV *
1381ready (SV *self) 3991ready (SV *self)
1382 PROTOTYPE: $ 3992 PROTOTYPE: $
1383 CODE: 3993 CODE:
1384 RETVAL = boolSV (api_ready (self)); 3994 RETVAL = boolSV (api_ready (aTHX_ self));
1385 OUTPUT:
1386 RETVAL
1387
1388SV *
1389is_ready (SV *self)
1390 PROTOTYPE: $
1391 CODE:
1392 RETVAL = boolSV (api_is_ready (self));
1393 OUTPUT: 3995 OUTPUT:
1394 RETVAL 3996 RETVAL
1395 3997
1396int 3998int
1397nready (...) 3999nready (...)
… …
1399 CODE: 4001 CODE:
1400 RETVAL = coro_nready; 4002 RETVAL = coro_nready;
1401 OUTPUT: 4003 OUTPUT:
1402 RETVAL 4004 RETVAL
1403 4005
1404MODULE = Coro::State PACKAGE = Coro::AIO 4006void
4007suspend (Coro::State self)
4008 PROTOTYPE: $
4009 CODE:
4010 self->flags |= CF_SUSPENDED;
4011
4012void
4013resume (Coro::State self)
4014 PROTOTYPE: $
4015 CODE:
4016 self->flags &= ~CF_SUSPENDED;
4017
4018void
4019_pool_handler (...)
4020 CODE:
4021 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
4022
4023void
4024async_pool (SV *cv, ...)
4025 PROTOTYPE: &@
4026 PPCODE:
4027{
4028 HV *hv = (HV *)av_pop (av_async_pool);
4029 AV *av = newAV ();
4030 SV *cb = ST (0);
4031 int i;
4032
4033 av_extend (av, items - 2);
4034 for (i = 1; i < items; ++i)
4035 av_push (av, SvREFCNT_inc_NN (ST (i)));
4036
4037 if ((SV *)hv == &PL_sv_undef)
4038 {
4039 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
4040 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
4041 SvREFCNT_dec (sv);
4042 }
4043
4044 {
4045 struct coro *coro = SvSTATE_hv (hv);
4046
4047 assert (!coro->invoke_cb);
4048 assert (!coro->invoke_av);
4049 coro->invoke_cb = SvREFCNT_inc (cb);
4050 coro->invoke_av = av;
4051 }
4052
4053 api_ready (aTHX_ (SV *)hv);
4054
4055 if (GIMME_V != G_VOID)
4056 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4057 else
4058 SvREFCNT_dec (hv);
4059}
1405 4060
1406SV * 4061SV *
1407_get_state () 4062rouse_cb ()
4063 PROTOTYPE:
1408 CODE: 4064 CODE:
1409{ 4065 RETVAL = coro_new_rouse_cb (aTHX);
1410 struct io_state *data;
1411
1412 RETVAL = newSV (sizeof (struct io_state));
1413 data = (struct io_state *)SvPVX (RETVAL);
1414 SvCUR_set (RETVAL, sizeof (struct io_state));
1415 SvPOK_only (RETVAL);
1416
1417 data->errorno = errno;
1418 data->laststype = PL_laststype;
1419 data->laststatval = PL_laststatval;
1420 data->statcache = PL_statcache;
1421}
1422 OUTPUT: 4066 OUTPUT:
1423 RETVAL 4067 RETVAL
1424 4068
1425void 4069void
1426_set_state (char *data_) 4070rouse_wait (...)
4071 PROTOTYPE: ;$
4072 PPCODE:
4073 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4074
4075void
4076on_enter (SV *block)
4077 ALIAS:
4078 on_leave = 1
1427 PROTOTYPE: $ 4079 PROTOTYPE: &
1428 CODE: 4080 CODE:
1429{ 4081{
1430 struct io_state *data = (void *)data_; 4082 struct coro *coro = SvSTATE_current;
4083 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1431 4084
1432 errno = data->errorno; 4085 block = s_get_cv_croak (block);
1433 PL_laststype = data->laststype;
1434 PL_laststatval = data->laststatval;
1435 PL_statcache = data->statcache;
1436}
1437 4086
4087 if (!*avp)
4088 *avp = newAV ();
4089
4090 av_push (*avp, SvREFCNT_inc (block));
4091
4092 if (!ix)
4093 on_enterleave_call (aTHX_ block);
4094
4095 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4096 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4097 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4098}
4099
4100
4101MODULE = Coro::State PACKAGE = PerlIO::cede
4102
4103BOOT:
4104 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4105
4106
4107MODULE = Coro::State PACKAGE = Coro::Semaphore
4108
4109SV *
4110new (SV *klass, SV *count = 0)
4111 CODE:
4112{
4113 int semcnt = 1;
4114
4115 if (count)
4116 {
4117 SvGETMAGIC (count);
4118
4119 if (SvOK (count))
4120 semcnt = SvIV (count);
4121 }
4122
4123 RETVAL = sv_bless (
4124 coro_waitarray_new (aTHX_ semcnt),
4125 GvSTASH (CvGV (cv))
4126 );
4127}
4128 OUTPUT:
4129 RETVAL
4130
4131# helper for Coro::Channel and others
4132SV *
4133_alloc (int count)
4134 CODE:
4135 RETVAL = coro_waitarray_new (aTHX_ count);
4136 OUTPUT:
4137 RETVAL
4138
4139SV *
4140count (SV *self)
4141 CODE:
4142 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4143 OUTPUT:
4144 RETVAL
4145
4146void
4147up (SV *self, int adjust = 1)
4148 ALIAS:
4149 adjust = 1
4150 CODE:
4151 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4152
4153void
4154down (...)
4155 CODE:
4156 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4157
4158void
4159wait (...)
4160 CODE:
4161 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4162
4163void
4164try (SV *self)
4165 PPCODE:
4166{
4167 AV *av = (AV *)SvRV (self);
4168 SV *count_sv = AvARRAY (av)[0];
4169 IV count = SvIVX (count_sv);
4170
4171 if (count > 0)
4172 {
4173 --count;
4174 SvIVX (count_sv) = count;
4175 XSRETURN_YES;
4176 }
4177 else
4178 XSRETURN_NO;
4179}
4180
4181void
4182waiters (SV *self)
4183 PPCODE:
4184{
4185 AV *av = (AV *)SvRV (self);
4186 int wcount = AvFILLp (av) + 1 - 1;
4187
4188 if (GIMME_V == G_SCALAR)
4189 XPUSHs (sv_2mortal (newSViv (wcount)));
4190 else
4191 {
4192 int i;
4193 EXTEND (SP, wcount);
4194 for (i = 1; i <= wcount; ++i)
4195 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4196 }
4197}
4198
4199MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4200
4201void
4202_may_delete (SV *sem, int count, unsigned int extra_refs)
4203 PPCODE:
4204{
4205 AV *av = (AV *)SvRV (sem);
4206
4207 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4208 && AvFILLp (av) == 0 /* no waiters, just count */
4209 && SvIV (AvARRAY (av)[0]) == count)
4210 XSRETURN_YES;
4211
4212 XSRETURN_NO;
4213}
4214
4215MODULE = Coro::State PACKAGE = Coro::Signal
4216
4217SV *
4218new (SV *klass)
4219 CODE:
4220 RETVAL = sv_bless (
4221 coro_waitarray_new (aTHX_ 0),
4222 GvSTASH (CvGV (cv))
4223 );
4224 OUTPUT:
4225 RETVAL
4226
4227void
4228wait (...)
4229 CODE:
4230 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4231
4232void
4233broadcast (SV *self)
4234 CODE:
4235{
4236 AV *av = (AV *)SvRV (self);
4237 coro_signal_wake (aTHX_ av, AvFILLp (av));
4238}
4239
4240void
4241send (SV *self)
4242 CODE:
4243{
4244 AV *av = (AV *)SvRV (self);
4245
4246 if (AvFILLp (av))
4247 coro_signal_wake (aTHX_ av, 1);
4248 else
4249 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4250}
4251
4252IV
4253awaited (SV *self)
4254 CODE:
4255 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4256 OUTPUT:
4257 RETVAL
4258
4259
4260MODULE = Coro::State PACKAGE = Coro::AnyEvent
4261
4262BOOT:
4263 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4264
4265void
4266_schedule (...)
4267 CODE:
4268{
4269 static int incede;
4270
4271 api_cede_notself (aTHX);
4272
4273 ++incede;
4274 while (coro_nready >= incede && api_cede (aTHX))
4275 ;
4276
4277 sv_setsv (sv_activity, &PL_sv_undef);
4278 if (coro_nready >= incede)
4279 {
4280 PUSHMARK (SP);
4281 PUTBACK;
4282 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4283 }
4284
4285 --incede;
4286}
4287
4288
4289MODULE = Coro::State PACKAGE = Coro::AIO
4290
4291void
4292_register (char *target, char *proto, SV *req)
4293 CODE:
4294{
4295 SV *req_cv = s_get_cv_croak (req);
4296 /* newXSproto doesn't return the CV on 5.8 */
4297 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4298 sv_setpv ((SV *)slf_cv, proto);
4299 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4300}
4301
4302MODULE = Coro::State PACKAGE = Coro::Select
4303
4304void
4305patch_pp_sselect ()
4306 CODE:
4307 if (!coro_old_pp_sselect)
4308 {
4309 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4310 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4311 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4312 }
4313
4314void
4315unpatch_pp_sselect ()
4316 CODE:
4317 if (coro_old_pp_sselect)
4318 {
4319 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4320 coro_old_pp_sselect = 0;
4321 }
4322

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