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Comparing Coro/Coro/State.xs (file contents):
Revision 1.105 by root, Mon Nov 27 02:01:33 2006 UTC vs.
Revision 1.474 by root, Tue Aug 14 15:46:03 2018 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 /* perl usually disables NDEBUG later */
5
1#include "libcoro/coro.c" 6#include "libcoro/coro.c"
7
8#if CORO_UCONTEXT
9 #define CORO_BACKEND "ucontext"
10#elif CORO_SJLJ
11 #define CORO_BACKEND "sjlj"
12#elif CORO_LINUX
13 #define CORO_BACKEND "linux"
14#elif CORO_LOSER
15 #define CORO_BACKEND "loser"
16#elif CORO_FIBER
17 #define CORO_BACKEND "fiber"
18#elif CORO_IRIX
19 #define CORO_BACKEND "irix"
20#elif CORO_ASM
21 #define CORO_BACKEND "asm"
22#elif CORO_PTHREAD
23 #define CORO_BACKEND "pthread"
24#else
25 #define CORO_BACKEND "unknown"
26#endif
27
28#define PERL_NO_GET_CONTEXT
29#define PERL_EXT
2 30
3#include "EXTERN.h" 31#include "EXTERN.h"
4#include "perl.h" 32#include "perl.h"
5#include "XSUB.h" 33#include "XSUB.h"
34#include "perliol.h"
6 35
7#include "patchlevel.h" 36#include "schmorp.h"
8 37
9#if USE_VALGRIND 38#define ECB_NO_THREADS 1
10# include <valgrind/valgrind.h> 39#define ECB_NO_LIBM 1
11#endif 40#include "ecb.h"
12 41
13#define PERL_VERSION_ATLEAST(a,b,c) \ 42#include <stddef.h>
14 (PERL_REVISION > (a) \
15 || (PERL_REVISION == (a) \
16 && (PERL_VERSION > (b) \
17 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18
19#if !PERL_VERSION_ATLEAST (5,6,0)
20# ifndef PL_ppaddr
21# define PL_ppaddr ppaddr
22# endif
23# ifndef call_sv
24# define call_sv perl_call_sv
25# endif
26# ifndef get_sv
27# define get_sv perl_get_sv
28# endif
29# ifndef get_cv
30# define get_cv perl_get_cv
31# endif
32# ifndef IS_PADGV
33# define IS_PADGV(v) 0
34# endif
35# ifndef IS_PADCONST
36# define IS_PADCONST(v) 0
37# endif
38#endif
39
40#include <stdio.h> 43#include <stdio.h>
41#include <errno.h> 44#include <errno.h>
42
43#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
44# undef STACKGUARD
45#endif
46
47#ifndef STACKGUARD
48# define STACKGUARD 0
49#endif
50
51#ifdef HAVE_MMAP
52# include <unistd.h> 45#include <assert.h>
53# include <sys/mman.h> 46
54# ifndef MAP_ANONYMOUS 47#ifndef SvREFCNT_dec_NN
55# ifdef MAP_ANON 48 #define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv)
56# define MAP_ANONYMOUS MAP_ANON
57# else
58# undef HAVE_MMAP
59# endif 49#endif
50
51#ifndef SvREFCNT_inc_NN
52 #define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
53#endif
54
55#ifndef SVs_PADSTALE
56# define SVs_PADSTALE 0
57#endif
58
59#ifdef PadARRAY
60# define NEWPADAPI 1
61# define newPADLIST(var) (Newz (0, var, 1, PADLIST), Newx (PadlistARRAY (var), 2, PAD *))
62#else
63typedef AV PADNAMELIST;
64# if !PERL_VERSION_ATLEAST(5,8,0)
65typedef AV PADLIST;
66typedef AV PAD;
60# endif 67# endif
61# include <limits.h> 68# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
62# ifndef PAGESIZE 69# define PadlistMAX(pl) AvFILLp (pl)
63# define PAGESIZE pagesize 70# define PadlistNAMES(pl) (*PadlistARRAY (pl))
64# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 71# define PadARRAY AvARRAY
65static long pagesize; 72# define PadMAX AvFILLp
73# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
74#endif
75#ifndef PadnamelistREFCNT
76# define PadnamelistREFCNT(pnl) SvREFCNT (pnl)
77#endif
78#ifndef PadnamelistREFCNT_dec
79# define PadnamelistREFCNT_dec(pnl) SvREFCNT_dec (pnl)
80#endif
81
82/* 5.19.something has replaced SVt_BIND by SVt_INVLIST */
83/* we just alias it to SVt_IV, as that is sufficient for swap_sv for now */
84#if PERL_VERSION_ATLEAST(5,19,0)
85# define SVt_BIND SVt_IV
86#endif
87
88#if defined(_WIN32)
89# undef HAS_GETTIMEOFDAY
90# undef setjmp
91# undef longjmp
92# undef _exit
93# define setjmp _setjmp /* deep magic */
66# else 94#else
67# define BOOT_PAGESIZE 95# include <inttypes.h> /* most portable stdint.h */
96#endif
97
98/* the maximum number of idle cctx that will be pooled */
99static int cctx_max_idle = 4;
100
101#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
102# define HAS_SCOPESTACK_NAME 1
103#endif
104
105/* prefer perl internal functions over our own? */
106#ifndef CORO_PREFER_PERL_FUNCTIONS
107# define CORO_PREFER_PERL_FUNCTIONS 0
108#endif
109
110/* The next macros try to return the current stack pointer, in an as
111 * portable way as possible. */
112#if __GNUC__ >= 4
113# define dSTACKLEVEL int stacklevel_dummy
114# define STACKLEVEL __builtin_frame_address (0)
115#else
116# define dSTACKLEVEL volatile void *stacklevel
117# define STACKLEVEL ((void *)&stacklevel)
118#endif
119
120#define IN_DESTRUCT PL_dirty
121
122#include "CoroAPI.h"
123#define GCoroAPI (&coroapi) /* very sneaky */
124
125#ifdef USE_ITHREADS
126# if CORO_PTHREAD
127static void *coro_thx;
68# endif 128# endif
69#endif 129#endif
70 130
71/* The next macro should declare a variable stacklevel that contains and approximation 131#ifdef __linux
72 * to the current C stack pointer. Its property is that it changes with each call 132# include <time.h> /* for timespec */
73 * and should be unique. */ 133# include <syscall.h> /* for SYS_* */
74#define dSTACKLEVEL int stacklevel 134# ifdef SYS_clock_gettime
75#define STACKLEVEL ((void *)&stacklevel) 135# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
136# define CORO_CLOCK_MONOTONIC 1
137# define CORO_CLOCK_THREAD_CPUTIME_ID 3
138# endif
139#endif
76 140
77#define IN_DESTRUCT (PL_main_cv == Nullcv) 141/* one off bugfix for perl 5.22 */
142#if PERL_VERSION_ATLEAST(5,22,0) && !PERL_VERSION_ATLEAST(5,24,0)
143# undef PadlistNAMES
144# define PadlistNAMES(pl) *((PADNAMELIST **)PadlistARRAY (pl))
145#endif
78 146
79#if __GNUC__ >= 3 147#if PERL_VERSION_ATLEAST(5,24,0)
80# define attribute(x) __attribute__(x) 148# define SUB_ARGARRAY PL_curpad[0]
81#else 149#else
82# define attribute(x) 150# define SUB_ARGARRAY (SV *)cx->blk_sub.argarray
83#endif 151#endif
84 152
85#define NOINLINE attribute ((noinline)) 153/* perl usually suppresses asserts. for debugging, we sometimes force it to be on */
86 154#if 0
87#include "CoroAPI.h" 155# undef NDEBUG
88 156# include <assert.h>
89#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
90
91#ifdef USE_ITHREADS
92static perl_mutex coro_mutex;
93# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
94# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
95#else
96# define LOCK (void)0
97# define UNLOCK (void)0
98#endif 157#endif
99 158
159static double (*nvtime)(); /* so why doesn't it take void? */
160static void (*u2time)(pTHX_ UV ret[2]);
161
162/* we hijack an hopefully unused CV flag for our purposes */
163#define CVf_SLF 0x4000
164static OP *pp_slf (pTHX);
165static void slf_destroy (pTHX_ struct coro *coro);
166
167static U32 cctx_gen;
168static size_t cctx_stacksize = CORO_STACKSIZE;
100static struct CoroAPI coroapi; 169static struct CoroAPI coroapi;
101static AV *main_mainstack; /* used to differentiate between $main and others */ 170static AV *main_mainstack; /* used to differentiate between $main and others */
171static JMPENV *main_top_env;
102static HV *coro_state_stash, *coro_stash; 172static HV *coro_state_stash, *coro_stash;
103static SV *coro_mortal; /* will be freed after next transfer */ 173static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
174
175static AV *av_destroy; /* destruction queue */
176static SV *sv_manager; /* the manager coro */
177static SV *sv_idle; /* $Coro::idle */
178
179static GV *irsgv; /* $/ */
180static GV *stdoutgv; /* *STDOUT */
181static SV *rv_diehook;
182static SV *rv_warnhook;
183
184/* async_pool helper stuff */
185static SV *sv_pool_rss;
186static SV *sv_pool_size;
187static SV *sv_async_pool_idle; /* description string */
188static AV *av_async_pool; /* idle pool */
189static SV *sv_Coro; /* class string */
190static CV *cv_pool_handler;
191
192/* Coro::AnyEvent */
193static SV *sv_activity;
194
195/* enable processtime/realtime profiling */
196static char enable_times;
197typedef U32 coro_ts[2];
198static coro_ts time_real, time_cpu;
199static char times_valid;
200
201static struct coro_cctx *cctx_first;
202static int cctx_count, cctx_idle;
203
204enum
205{
206 CC_MAPPED = 0x01,
207 CC_NOREUSE = 0x02, /* throw this away after tracing */
208 CC_TRACE = 0x04,
209 CC_TRACE_SUB = 0x08, /* trace sub calls */
210 CC_TRACE_LINE = 0x10, /* trace each statement */
211 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
212};
104 213
105/* this is a structure representing a c-level coroutine */ 214/* this is a structure representing a c-level coroutine */
106typedef struct coro_stack { 215typedef struct coro_cctx
216{
107 struct coro_stack *next; 217 struct coro_cctx *next;
108 218
109 /* the stack */ 219 /* the stack */
110 void *sptr; 220 struct coro_stack stack;
111 long ssize; /* positive == mmap, otherwise malloc */
112 221
113 /* cpu state */ 222 /* cpu state */
114 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 223 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
224#ifndef NDEBUG
225 JMPENV *idle_te; /* same as idle_sp, but for top_env */
226#endif
115 JMPENV *top_env; 227 JMPENV *top_env;
116 coro_context cctx; 228 coro_context cctx;
117 229
230 U32 gen;
118#if USE_VALGRIND 231#if CORO_USE_VALGRIND
119 int valgrind_id; 232 int valgrind_id;
120#endif 233#endif
121} coro_stack; 234 unsigned char flags;
235} coro_cctx;
236
237static coro_cctx *cctx_current; /* the currently running cctx */
238
239/*****************************************************************************/
240
241static MGVTBL coro_state_vtbl;
242
243enum
244{
245 CF_RUNNING = 0x0001, /* coroutine is running */
246 CF_READY = 0x0002, /* coroutine is ready */
247 CF_NEW = 0x0004, /* has never been switched to */
248 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
249 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
250 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
251};
252
253/* the structure where most of the perl state is stored, overlaid on the cxstack */
254typedef struct
255{
256 #define VARx(name,expr,type) type name;
257 #include "state.h"
258} perl_slots;
259
260/* how many context stack entries do we need for perl_slots */
261#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
122 262
123/* this is a structure representing a perl-level coroutine */ 263/* this is a structure representing a perl-level coroutine */
124struct coro { 264struct coro
265{
125 /* the c coroutine allocated to this perl coroutine, if any */ 266 /* the C coroutine allocated to this perl coroutine, if any */
126 coro_stack *stack; 267 coro_cctx *cctx;
127 268
128 /* data associated with this coroutine (initial args) */ 269 /* ready queue */
129 AV *args; 270 struct coro *next_ready;
130 int refcnt;
131 271
132 /* optionally saved, might be zero */ 272 /* state data */
133 AV *defav; 273 struct CoroSLF slf_frame; /* saved slf frame */
134 SV *defsv;
135 SV *errsv;
136
137 /* saved global state not related to stacks */
138 U8 dowarn;
139 I32 in_eval;
140
141 /* the stacks and related info (callchain etc..) */
142 PERL_SI *curstackinfo;
143 AV *curstack;
144 AV *mainstack; 274 AV *mainstack;
145 SV **stack_sp; 275 perl_slots *slot; /* basically the saved sp */
146 OP *op; 276
147 SV **curpad; 277 CV *startcv; /* the CV to execute */
148 AV *comppad; 278 AV *args; /* data associated with this coroutine (initial args) */
149 CV *compcv; 279 int flags; /* CF_ flags */
150 SV **stack_base; 280 HV *hv; /* the perl hash associated with this coro, if any */
151 SV **stack_max; 281
152 SV **tmps_stack; 282 /* statistics */
153 I32 tmps_floor; 283 int usecount; /* number of transfers to this coro */
154 I32 tmps_ix;
155 I32 tmps_max;
156 I32 *markstack;
157 I32 *markstack_ptr;
158 I32 *markstack_max;
159 I32 *scopestack;
160 I32 scopestack_ix;
161 I32 scopestack_max;
162 ANY *savestack;
163 I32 savestack_ix;
164 I32 savestack_max;
165 OP **retstack;
166 I32 retstack_ix;
167 I32 retstack_max;
168 PMOP *curpm;
169 COP *curcop;
170 284
171 /* coro process data */ 285 /* coro process data */
172 int prio; 286 int prio;
287 SV *except; /* exception to be thrown */
288 SV *rouse_cb; /* last rouse callback */
289 AV *on_destroy; /* callbacks or coros to notify on destroy */
290 AV *status; /* the exit status list */
291
292 /* async_pool */
293 SV *saved_deffh;
294 SV *invoke_cb;
295 AV *invoke_av;
296
297 /* on_enter/on_leave */
298 AV *on_enter; AV *on_enter_xs;
299 AV *on_leave; AV *on_leave_xs;
300
301 /* swap_sv */
302 AV *swap_sv;
303
304 /* times */
305 coro_ts t_cpu, t_real;
306
307 /* linked list */
308 struct coro *next, *prev;
173}; 309};
174 310
175typedef struct coro *Coro__State; 311typedef struct coro *Coro__State;
176typedef struct coro *Coro__State_or_hashref; 312typedef struct coro *Coro__State_or_hashref;
177 313
314/* the following variables are effectively part of the perl context */
315/* and get copied between struct coro and these variables */
316/* the main reason we don't support windows process emulation */
317static struct CoroSLF slf_frame; /* the current slf frame */
318
319/** Coro ********************************************************************/
320
321#define CORO_PRIO_MAX 3
322#define CORO_PRIO_HIGH 1
323#define CORO_PRIO_NORMAL 0
324#define CORO_PRIO_LOW -1
325#define CORO_PRIO_IDLE -3
326#define CORO_PRIO_MIN -4
327
328/* for Coro.pm */
329static SV *coro_current;
330static SV *coro_readyhook;
331static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
332static CV *cv_coro_run;
333static struct coro *coro_first;
334#define coro_nready coroapi.nready
335
336/** JIT *********************************************************************/
337
338#if CORO_JIT
339 /* APPLE doesn't have mmap though */
340 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
341 #ifndef CORO_JIT_TYPE
342 #if ECB_AMD64 && CORO_JIT_UNIXY
343 #define CORO_JIT_TYPE "amd64-unix"
344 #elif __i386 && CORO_JIT_UNIXY
345 #define CORO_JIT_TYPE "x86-unix"
346 #endif
347 #endif
348#endif
349
350#if !defined(CORO_JIT_TYPE) || _POSIX_MEMORY_PROTECTION <= 0
351 #undef CORO_JIT
352#endif
353
354#if CORO_JIT
355 typedef void (*load_save_perl_slots_type)(perl_slots *);
356 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
357#endif
358
359/** Coro::Select ************************************************************/
360
361static OP *(*coro_old_pp_sselect) (pTHX);
362static SV *coro_select_select;
363
364/* horrible hack, but if it works... */
178static AV * 365static OP *
366coro_pp_sselect (pTHX)
367{
368 dSP;
369 PUSHMARK (SP - 4); /* fake argument list */
370 XPUSHs (coro_select_select);
371 PUTBACK;
372
373 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
374 PL_op->op_flags |= OPf_STACKED;
375 PL_op->op_private = 0;
376 return PL_ppaddr [OP_ENTERSUB](aTHX);
377}
378
379/** time stuff **************************************************************/
380
381#ifdef HAS_GETTIMEOFDAY
382
383ecb_inline void
384coro_u2time (pTHX_ UV ret[2])
385{
386 struct timeval tv;
387 gettimeofday (&tv, 0);
388
389 ret [0] = tv.tv_sec;
390 ret [1] = tv.tv_usec;
391}
392
393ecb_inline double
394coro_nvtime (void)
395{
396 struct timeval tv;
397 gettimeofday (&tv, 0);
398
399 return tv.tv_sec + tv.tv_usec * 1e-6;
400}
401
402ecb_inline void
403time_init (pTHX)
404{
405 nvtime = coro_nvtime;
406 u2time = coro_u2time;
407}
408
409#else
410
411ecb_inline void
412time_init (pTHX)
413{
414 SV **svp;
415
416 require_pv ("Time/HiRes.pm");
417
418 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
419
420 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
421 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
422
423 nvtime = INT2PTR (double (*)(), SvIV (*svp));
424
425 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
426 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
427}
428
429#endif
430
431/** lowlevel stuff **********************************************************/
432
433static SV * ecb_noinline
434coro_get_sv (pTHX_ const char *name, int create)
435{
436#if PERL_VERSION_ATLEAST (5,10,0)
437 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
438 get_sv (name, create);
439#endif
440 return get_sv (name, create);
441}
442
443static AV * ecb_noinline
444coro_get_av (pTHX_ const char *name, int create)
445{
446#if PERL_VERSION_ATLEAST (5,10,0)
447 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
448 get_av (name, create);
449#endif
450 return get_av (name, create);
451}
452
453static HV * ecb_noinline
454coro_get_hv (pTHX_ const char *name, int create)
455{
456#if PERL_VERSION_ATLEAST (5,10,0)
457 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
458 get_hv (name, create);
459#endif
460 return get_hv (name, create);
461}
462
463ecb_inline void
464coro_times_update (void)
465{
466#ifdef coro_clock_gettime
467 struct timespec ts;
468
469 ts.tv_sec = ts.tv_nsec = 0;
470 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
471 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
472
473 ts.tv_sec = ts.tv_nsec = 0;
474 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
475 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
476#else
477 dTHX;
478 UV tv[2];
479
480 u2time (aTHX_ tv);
481 time_real [0] = tv [0];
482 time_real [1] = tv [1] * 1000;
483#endif
484}
485
486ecb_inline void
487coro_times_add (struct coro *c)
488{
489 c->t_real [1] += time_real [1];
490 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
491 c->t_real [0] += time_real [0];
492
493 c->t_cpu [1] += time_cpu [1];
494 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
495 c->t_cpu [0] += time_cpu [0];
496}
497
498ecb_inline void
499coro_times_sub (struct coro *c)
500{
501 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
502 c->t_real [1] -= time_real [1];
503 c->t_real [0] -= time_real [0];
504
505 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
506 c->t_cpu [1] -= time_cpu [1];
507 c->t_cpu [0] -= time_cpu [0];
508}
509
510/*****************************************************************************/
511/* magic glue */
512
513#define CORO_MAGIC_type_cv 26
514#define CORO_MAGIC_type_state PERL_MAGIC_ext
515
516#define CORO_MAGIC_NN(sv, type) \
517 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
518 ? SvMAGIC (sv) \
519 : mg_find (sv, type))
520
521#define CORO_MAGIC(sv, type) \
522 (ecb_expect_true (SvMAGIC (sv)) \
523 ? CORO_MAGIC_NN (sv, type) \
524 : 0)
525
526#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
527#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
528
529ecb_inline MAGIC *
530SvSTATEhv_p (pTHX_ SV *coro)
531{
532 MAGIC *mg;
533
534 if (ecb_expect_true (
535 SvTYPE (coro) == SVt_PVHV
536 && (mg = CORO_MAGIC_state (coro))
537 && mg->mg_virtual == &coro_state_vtbl
538 ))
539 return mg;
540
541 return 0;
542}
543
544ecb_inline struct coro *
545SvSTATE_ (pTHX_ SV *coro_sv)
546{
547 MAGIC *mg;
548
549 if (SvROK (coro_sv))
550 coro_sv = SvRV (coro_sv);
551
552 mg = SvSTATEhv_p (aTHX_ coro_sv);
553 if (!mg)
554 croak ("Coro::State object required");
555
556 return (struct coro *)mg->mg_ptr;
557}
558
559#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
560
561/* faster than SvSTATE, but expects a coroutine hv */
562#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
563#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
564
565/*****************************************************************************/
566/* padlist management and caching */
567
568ecb_inline PADLIST *
179coro_clone_padlist (CV *cv) 569coro_derive_padlist (pTHX_ CV *cv)
180{ 570{
181 AV *padlist = CvPADLIST (cv); 571 PADLIST *padlist = CvPADLIST (cv);
182 AV *newpadlist, *newpad; 572 PADLIST *newpadlist;
573 PADNAMELIST *padnames;
574 PAD *newpad;
575 PADOFFSET off = PadlistMAX (padlist) + 1;
183 576
184 newpadlist = newAV (); 577#if NEWPADAPI
578
579 /* if we had the original CvDEPTH, we might be able to steal the CvDEPTH+1 entry instead */
580 /* 20131102194744.GA6705@schmorp.de, 20131102195825.2013.qmail@lists-nntp.develooper.com */
581 while (!PadlistARRAY (padlist)[off - 1])
582 --off;
583
584 Perl_pad_push (aTHX_ padlist, off);
585
586 newpad = PadlistARRAY (padlist)[off];
587 PadlistARRAY (padlist)[off] = 0;
588
589#else
590
591#if PERL_VERSION_ATLEAST (5,10,0)
592 Perl_pad_push (aTHX_ padlist, off);
593#else
594 Perl_pad_push (aTHX_ padlist, off, 1);
595#endif
596
597 newpad = PadlistARRAY (padlist)[off];
598 PadlistMAX (padlist) = off - 1;
599
600#endif
601
602 newPADLIST (newpadlist);
603#if !PERL_VERSION_ATLEAST(5,15,3)
604 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
185 AvREAL_off (newpadlist); 605 AvREAL_off (newpadlist);
186#if PERL_VERSION_ATLEAST (5,9,0)
187 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
188#else
189 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
190#endif 606#endif
191 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
192 --AvFILLp (padlist);
193 607
194 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 608 /* Already extended to 2 elements by newPADLIST. */
195 av_store (newpadlist, 1, (SV *)newpad); 609 PadlistMAX (newpadlist) = 1;
610
611 padnames = PadlistNAMES (padlist);
612 ++PadnamelistREFCNT (padnames);
613 PadlistNAMES (newpadlist) = padnames;
614
615 PadlistARRAY (newpadlist)[1] = newpad;
196 616
197 return newpadlist; 617 return newpadlist;
198} 618}
199 619
200static void 620ecb_inline void
201free_padlist (AV *padlist) 621free_padlist (pTHX_ PADLIST *padlist)
202{ 622{
203 /* may be during global destruction */ 623 /* may be during global destruction */
204 if (SvREFCNT (padlist)) 624 if (!IN_DESTRUCT)
205 { 625 {
206 I32 i = AvFILLp (padlist); 626 I32 i = PadlistMAX (padlist);
207 while (i >= 0) 627
628 while (i > 0) /* special-case index 0 */
208 { 629 {
209 SV **svp = av_fetch (padlist, i--, FALSE); 630 /* we try to be extra-careful here */
631 PAD *pad = PadlistARRAY (padlist)[i--];
632
210 if (svp) 633 if (pad)
211 { 634 {
212 SV *sv; 635 I32 j = PadMAX (pad);
213 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 636
637 while (j >= 0)
214 SvREFCNT_dec (sv); 638 SvREFCNT_dec (PadARRAY (pad)[j--]);
215 639
640 PadMAX (pad) = -1;
216 SvREFCNT_dec (*svp); 641 SvREFCNT_dec (pad);
217 } 642 }
218 } 643 }
219 644
645 PadnamelistREFCNT_dec (PadlistNAMES (padlist));
646
647#if NEWPADAPI
648 Safefree (PadlistARRAY (padlist));
649 Safefree (padlist);
650#else
651 AvFILLp (padlist) = -1;
652 AvREAL_off (padlist);
220 SvREFCNT_dec ((SV*)padlist); 653 SvREFCNT_dec ((SV*)padlist);
654#endif
221 } 655 }
222} 656}
223 657
224static int 658static int
225coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 659coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
226{ 660{
227 AV *padlist; 661 PADLIST *padlist;
228 AV *av = (AV *)mg->mg_obj; 662 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
663 size_t len = *(size_t *)mg->mg_ptr;
229 664
230 /* casting is fun. */ 665 /* perl manages to free our internal AV and _then_ call us */
231 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 666 if (IN_DESTRUCT)
667 return 0;
668
669 while (len--)
232 free_padlist (padlist); 670 free_padlist (aTHX_ padlists[len]);
233
234 SvREFCNT_dec (av);
235 671
236 return 0; 672 return 0;
237} 673}
238 674
239#define PERL_MAGIC_coro PERL_MAGIC_ext 675static MGVTBL coro_cv_vtbl = {
240 676 0, 0, 0, 0,
241static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 677 coro_cv_free
678};
242 679
243/* the next two functions merely cache the padlists */ 680/* the next two functions merely cache the padlists */
244static void 681ecb_inline void
245get_padlist (CV *cv) 682get_padlist (pTHX_ CV *cv)
246{ 683{
247 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 684 MAGIC *mg = CORO_MAGIC_cv (cv);
685 size_t *lenp;
248 686
249 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 687 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
250 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 688 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
251 else 689 else
252 { 690 {
253#if 0 691#if CORO_PREFER_PERL_FUNCTIONS
254 /* this is probably cleaner, but also slower? */ 692 /* this is probably cleaner? but also slower! */
693 /* in practise, it seems to be less stable */
255 CV *cp = Perl_cv_clone (cv); 694 CV *cp = Perl_cv_clone (aTHX_ cv);
256 CvPADLIST (cv) = CvPADLIST (cp); 695 CvPADLIST (cv) = CvPADLIST (cp);
257 CvPADLIST (cp) = 0; 696 CvPADLIST (cp) = 0;
258 SvREFCNT_dec (cp); 697 SvREFCNT_dec (cp);
259#else 698#else
260 CvPADLIST (cv) = coro_clone_padlist (cv); 699 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
261#endif 700#endif
262 } 701 }
263} 702}
264 703
265static void 704ecb_inline void
266put_padlist (CV *cv) 705put_padlist (pTHX_ CV *cv)
267{ 706{
268 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 707 MAGIC *mg = CORO_MAGIC_cv (cv);
269 708
270 if (!mg) 709 if (ecb_expect_false (!mg))
271 {
272 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
273 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
274 mg->mg_virtual = &vtbl_coro;
275 mg->mg_obj = (SV *)newAV ();
276 } 710 {
711 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
712 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
713 mg->mg_len = 1; /* so mg_free frees mg_ptr */
714 }
715 else
716 Renew (mg->mg_ptr,
717 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
718 char);
277 719
278 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 720 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
279} 721}
280 722
281#define SB do { 723/** load & save, init *******************************************************/
282#define SE } while (0)
283 724
284#define LOAD(state) load_state((state)); 725ecb_inline void
285#define SAVE(state,flags) save_state((state),(flags)); 726swap_sv (SV *a, SV *b)
727{
728 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
729 SV tmp;
286 730
287#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 731 /* swap sv_any */
732 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
288 733
734 /* swap sv_flags */
735 SvFLAGS (&tmp) = SvFLAGS (a);
736 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
737 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
738
739#if PERL_VERSION_ATLEAST (5,10,0)
740 /* perl 5.10 and later complicates this _quite_ a bit, but it also
741 * is much faster, so no quarrels here. alternatively, we could
742 * sv_upgrade to avoid this.
743 */
744 {
745 /* swap sv_u */
746 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
747
748 /* if SvANY points to the head, we need to adjust the pointers,
749 * as the pointer for a still points to b, and maybe vice versa.
750 */
751 U32 svany_in_head_set = (1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV);
752 #if NVSIZE <= IVSIZE && PERL_VERSION_ATLEAST(5,22,0)
753 svany_in_head_set |= 1 << SVt_NV;
754 #endif
755
756 #define svany_in_head(type) (svany_in_head_set & (1 << (type)))
757
758 if (svany_in_head (SvTYPE (a)))
759 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
760
761 if (svany_in_head (SvTYPE (b)))
762 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
763 }
764#endif
765}
766
767/* swap sv heads, at least logically */
289static void 768static void
769swap_svs_enter (pTHX_ Coro__State c)
770{
771 int i;
772
773 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
774 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
775}
776
777static void
778swap_svs_leave (pTHX_ Coro__State c)
779{
780 int i;
781
782 for (i = AvFILLp (c->swap_sv) - 1; i >= 0; i -= 2)
783 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
784}
785
786#define SWAP_SVS_ENTER(coro) \
787 if (ecb_expect_false ((coro)->swap_sv)) \
788 swap_svs_enter (aTHX_ (coro))
789
790#define SWAP_SVS_LEAVE(coro) \
791 if (ecb_expect_false ((coro)->swap_sv)) \
792 swap_svs_leave (aTHX_ (coro))
793
794static void
795on_enterleave_call (pTHX_ SV *cb);
796
797static void
290load_state(Coro__State c) 798load_perl (pTHX_ Coro__State c)
291{ 799{
292 PL_dowarn = c->dowarn; 800 perl_slots *slot = c->slot;
293 PL_in_eval = c->in_eval; 801 c->slot = 0;
294 802
295 PL_curstackinfo = c->curstackinfo;
296 PL_curstack = c->curstack;
297 PL_mainstack = c->mainstack; 803 PL_mainstack = c->mainstack;
298 PL_stack_sp = c->stack_sp;
299 PL_op = c->op;
300 PL_curpad = c->curpad;
301 PL_comppad = c->comppad;
302 PL_compcv = c->compcv;
303 PL_stack_base = c->stack_base;
304 PL_stack_max = c->stack_max;
305 PL_tmps_stack = c->tmps_stack;
306 PL_tmps_floor = c->tmps_floor;
307 PL_tmps_ix = c->tmps_ix;
308 PL_tmps_max = c->tmps_max;
309 PL_markstack = c->markstack;
310 PL_markstack_ptr = c->markstack_ptr;
311 PL_markstack_max = c->markstack_max;
312 PL_scopestack = c->scopestack;
313 PL_scopestack_ix = c->scopestack_ix;
314 PL_scopestack_max = c->scopestack_max;
315 PL_savestack = c->savestack;
316 PL_savestack_ix = c->savestack_ix;
317 PL_savestack_max = c->savestack_max;
318#if !PERL_VERSION_ATLEAST (5,9,0)
319 PL_retstack = c->retstack;
320 PL_retstack_ix = c->retstack_ix;
321 PL_retstack_max = c->retstack_max;
322#endif
323 PL_curpm = c->curpm;
324 PL_curcop = c->curcop;
325 804
326 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 805#if CORO_JIT
327 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 806 load_perl_slots (slot);
328 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 807#else
808 #define VARx(name,expr,type) expr = slot->name;
809 #include "state.h"
810#endif
329 811
330 { 812 {
331 dSP; 813 dSP;
814
332 CV *cv; 815 CV *cv;
333 816
334 /* now do the ugly restore mess */ 817 /* now do the ugly restore mess */
335 while ((cv = (CV *)POPs)) 818 while (ecb_expect_true (cv = (CV *)POPs))
336 { 819 {
337 AV *padlist = (AV *)POPs;
338
339 if (padlist)
340 {
341 put_padlist (cv); /* mark this padlist as available */ 820 put_padlist (aTHX_ cv); /* mark this padlist as available */
342 CvPADLIST(cv) = padlist; 821 CvDEPTH (cv) = PTR2IV (POPs);
343 } 822 CvPADLIST (cv) = (PADLIST *)POPs;
344
345 ++CvDEPTH(cv);
346 } 823 }
347 824
348 PUTBACK; 825 PUTBACK;
349 } 826 }
350}
351 827
828 slf_frame = c->slf_frame;
829 CORO_THROW = c->except;
830
831 if (ecb_expect_false (enable_times))
832 {
833 if (ecb_expect_false (!times_valid))
834 coro_times_update ();
835
836 coro_times_sub (c);
837 }
838
839 if (ecb_expect_false (c->on_enter))
840 {
841 int i;
842
843 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
844 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
845 }
846
847 if (ecb_expect_false (c->on_enter_xs))
848 {
849 int i;
850
851 for (i = 0; i <= AvFILLp (c->on_enter_xs); i += 2)
852 ((coro_enterleave_hook)AvARRAY (c->on_enter_xs)[i]) (aTHX_ AvARRAY (c->on_enter_xs)[i + 1]);
853 }
854
855 SWAP_SVS_ENTER (c);
856}
857
352static void 858static void
353save_state(Coro__State c, int flags) 859save_perl (pTHX_ Coro__State c)
354{ 860{
861 SWAP_SVS_LEAVE (c);
862
863 if (ecb_expect_false (c->on_leave_xs))
864 {
865 int i;
866
867 for (i = AvFILLp (c->on_leave_xs) - 1; i >= 0; i -= 2)
868 ((coro_enterleave_hook)AvARRAY (c->on_leave_xs)[i]) (aTHX_ AvARRAY (c->on_leave_xs)[i + 1]);
869 }
870
871 if (ecb_expect_false (c->on_leave))
872 {
873 int i;
874
875 for (i = AvFILLp (c->on_leave); i >= 0; --i)
876 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
877 }
878
879 times_valid = 0;
880
881 if (ecb_expect_false (enable_times))
882 {
883 coro_times_update (); times_valid = 1;
884 coro_times_add (c);
885 }
886
887 c->except = CORO_THROW;
888 c->slf_frame = slf_frame;
889
355 { 890 {
356 dSP; 891 dSP;
357 I32 cxix = cxstack_ix; 892 I32 cxix = cxstack_ix;
358 PERL_CONTEXT *ccstk = cxstack; 893 PERL_CONTEXT *ccstk = cxstack;
359 PERL_SI *top_si = PL_curstackinfo; 894 PERL_SI *top_si = PL_curstackinfo;
… …
361 /* 896 /*
362 * the worst thing you can imagine happens first - we have to save 897 * the worst thing you can imagine happens first - we have to save
363 * (and reinitialize) all cv's in the whole callchain :( 898 * (and reinitialize) all cv's in the whole callchain :(
364 */ 899 */
365 900
366 PUSHs (Nullsv); 901 XPUSHs (Nullsv);
367 /* this loop was inspired by pp_caller */ 902 /* this loop was inspired by pp_caller */
368 for (;;) 903 for (;;)
369 { 904 {
370 while (cxix >= 0) 905 while (ecb_expect_true (cxix >= 0))
371 { 906 {
372 PERL_CONTEXT *cx = &ccstk[cxix--]; 907 PERL_CONTEXT *cx = &ccstk[cxix--];
373 908
374 if (CxTYPE(cx) == CXt_SUB) 909 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
375 { 910 {
376 CV *cv = cx->blk_sub.cv; 911 CV *cv = cx->blk_sub.cv;
912
377 if (CvDEPTH(cv)) 913 if (ecb_expect_true (CvDEPTH (cv)))
378 { 914 {
379 EXTEND (SP, CvDEPTH(cv)*2); 915 EXTEND (SP, 3);
380
381 while (--CvDEPTH(cv))
382 {
383 /* this tells the restore code to increment CvDEPTH */
384 PUSHs (Nullsv);
385 PUSHs ((SV *)cv);
386 }
387
388 PUSHs ((SV *)CvPADLIST(cv)); 916 PUSHs ((SV *)CvPADLIST (cv));
917 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
389 PUSHs ((SV *)cv); 918 PUSHs ((SV *)cv);
390 919
920 CvDEPTH (cv) = 0;
391 get_padlist (cv); 921 get_padlist (aTHX_ cv);
392 } 922 }
393 } 923 }
394#ifdef CXt_FORMAT
395 else if (CxTYPE(cx) == CXt_FORMAT)
396 {
397 /* I never used formats, so how should I know how these are implemented? */
398 /* my bold guess is as a simple, plain sub... */
399 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
400 }
401#endif
402 } 924 }
403 925
404 if (top_si->si_type == PERLSI_MAIN) 926 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
405 break; 927 break;
406 928
407 top_si = top_si->si_prev; 929 top_si = top_si->si_prev;
408 ccstk = top_si->si_cxstack; 930 ccstk = top_si->si_cxstack;
409 cxix = top_si->si_cxix; 931 cxix = top_si->si_cxix;
410 } 932 }
411 933
412 PUTBACK; 934 PUTBACK;
413 } 935 }
414 936
415 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 937 /* allocate some space on the context stack for our purposes */
416 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 938 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
417 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 939 {
940 unsigned int i;
418 941
419 c->dowarn = PL_dowarn; 942 for (i = 0; i < SLOT_COUNT; ++i)
420 c->in_eval = PL_in_eval; 943 CXINC;
421 944
422 c->curstackinfo = PL_curstackinfo; 945 cxstack_ix -= SLOT_COUNT; /* undo allocation */
423 c->curstack = PL_curstack; 946 }
947
424 c->mainstack = PL_mainstack; 948 c->mainstack = PL_mainstack;
425 c->stack_sp = PL_stack_sp; 949
426 c->op = PL_op; 950 {
427 c->curpad = PL_curpad; 951 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
428 c->comppad = PL_comppad; 952
429 c->compcv = PL_compcv; 953#if CORO_JIT
430 c->stack_base = PL_stack_base; 954 save_perl_slots (slot);
431 c->stack_max = PL_stack_max; 955#else
432 c->tmps_stack = PL_tmps_stack; 956 #define VARx(name,expr,type) slot->name = expr;
433 c->tmps_floor = PL_tmps_floor; 957 #include "state.h"
434 c->tmps_ix = PL_tmps_ix;
435 c->tmps_max = PL_tmps_max;
436 c->markstack = PL_markstack;
437 c->markstack_ptr = PL_markstack_ptr;
438 c->markstack_max = PL_markstack_max;
439 c->scopestack = PL_scopestack;
440 c->scopestack_ix = PL_scopestack_ix;
441 c->scopestack_max = PL_scopestack_max;
442 c->savestack = PL_savestack;
443 c->savestack_ix = PL_savestack_ix;
444 c->savestack_max = PL_savestack_max;
445#if !PERL_VERSION_ATLEAST (5,9,0)
446 c->retstack = PL_retstack;
447 c->retstack_ix = PL_retstack_ix;
448 c->retstack_max = PL_retstack_max;
449#endif 958#endif
450 c->curpm = PL_curpm; 959 }
451 c->curcop = PL_curcop;
452} 960}
453 961
454/* 962/*
455 * allocate various perl stacks. This is an exact copy 963 * allocate various perl stacks. This is almost an exact copy
456 * of perl.c:init_stacks, except that it uses less memory 964 * of perl.c:init_stacks, except that it uses less memory
457 * on the (sometimes correct) assumption that coroutines do 965 * on the (sometimes correct) assumption that coroutines do
458 * not usually need a lot of stackspace. 966 * not usually need a lot of stackspace.
459 */ 967 */
968#if CORO_PREFER_PERL_FUNCTIONS
969# define coro_init_stacks(thx) init_stacks ()
970#else
460static void 971static void
461coro_init_stacks () 972coro_init_stacks (pTHX)
462{ 973{
463 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 974 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
464 PL_curstackinfo->si_type = PERLSI_MAIN; 975 PL_curstackinfo->si_type = PERLSI_MAIN;
465 PL_curstack = PL_curstackinfo->si_stack; 976 PL_curstack = PL_curstackinfo->si_stack;
466 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 977 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
467 978
468 PL_stack_base = AvARRAY(PL_curstack); 979 PL_stack_base = AvARRAY(PL_curstack);
469 PL_stack_sp = PL_stack_base; 980 PL_stack_sp = PL_stack_base;
470 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 981 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
471 982
472 New(50,PL_tmps_stack,96,SV*); 983 New(50,PL_tmps_stack,32,SV*);
473 PL_tmps_floor = -1; 984 PL_tmps_floor = -1;
474 PL_tmps_ix = -1; 985 PL_tmps_ix = -1;
475 PL_tmps_max = 96; 986 PL_tmps_max = 32;
476 987
477 New(54,PL_markstack,16,I32); 988 New(54,PL_markstack,16,I32);
478 PL_markstack_ptr = PL_markstack; 989 PL_markstack_ptr = PL_markstack;
479 PL_markstack_max = PL_markstack + 16; 990 PL_markstack_max = PL_markstack + 16;
480 991
481#ifdef SET_MARK_OFFSET 992#ifdef SET_MARK_OFFSET
482 SET_MARK_OFFSET; 993 SET_MARK_OFFSET;
483#endif 994#endif
484 995
485 New(54,PL_scopestack,16,I32); 996 New(54,PL_scopestack,8,I32);
486 PL_scopestack_ix = 0; 997 PL_scopestack_ix = 0;
487 PL_scopestack_max = 16; 998 PL_scopestack_max = 8;
999#if HAS_SCOPESTACK_NAME
1000 New(54,PL_scopestack_name,8,const char*);
1001#endif
488 1002
489 New(54,PL_savestack,96,ANY); 1003 New(54,PL_savestack,24,ANY);
490 PL_savestack_ix = 0; 1004 PL_savestack_ix = 0;
491 PL_savestack_max = 96; 1005 PL_savestack_max = 24;
1006#if PERL_VERSION_ATLEAST (5,24,0)
1007 /* perl 5.24 moves SS_MAXPUSH optimisation from */
1008 /* the header macros to PL_savestack_max */
1009 PL_savestack_max -= SS_MAXPUSH;
1010#endif
492 1011
493#if !PERL_VERSION_ATLEAST (5,9,0) 1012#if !PERL_VERSION_ATLEAST (5,10,0)
494 New(54,PL_retstack,8,OP*); 1013 New(54,PL_retstack,4,OP*);
495 PL_retstack_ix = 0; 1014 PL_retstack_ix = 0;
496 PL_retstack_max = 8; 1015 PL_retstack_max = 4;
497#endif 1016#endif
498} 1017}
1018#endif
499 1019
500/* 1020/*
501 * destroy the stacks, the callchain etc... 1021 * destroy the stacks, the callchain etc...
502 */ 1022 */
503static void 1023static void
504coro_destroy_stacks() 1024coro_destruct_stacks (pTHX)
505{ 1025{
506 if (!IN_DESTRUCT)
507 {
508 /* is this ugly, I ask? */
509 LEAVE_SCOPE (0);
510
511 /* sure it is, but more important: is it correct?? :/ */
512 FREETMPS;
513
514 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
515 }
516
517 while (PL_curstackinfo->si_next) 1026 while (PL_curstackinfo->si_next)
518 PL_curstackinfo = PL_curstackinfo->si_next; 1027 PL_curstackinfo = PL_curstackinfo->si_next;
519 1028
520 while (PL_curstackinfo) 1029 while (PL_curstackinfo)
521 { 1030 {
522 PERL_SI *p = PL_curstackinfo->si_prev; 1031 PERL_SI *p = PL_curstackinfo->si_prev;
523 1032
524 { /*D*//*remove*/
525 dSP;
526 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
527 PUTBACK; /* possibly superfluous */
528 }
529
530 if (!IN_DESTRUCT) 1033 if (!IN_DESTRUCT)
531 {
532 dounwind (-1);/*D*//*remove*/
533 SvREFCNT_dec (PL_curstackinfo->si_stack); 1034 SvREFCNT_dec (PL_curstackinfo->si_stack);
534 }
535 1035
536 Safefree (PL_curstackinfo->si_cxstack); 1036 Safefree (PL_curstackinfo->si_cxstack);
537 Safefree (PL_curstackinfo); 1037 Safefree (PL_curstackinfo);
538 PL_curstackinfo = p; 1038 PL_curstackinfo = p;
539 } 1039 }
540 1040
541 Safefree (PL_tmps_stack); 1041 Safefree (PL_tmps_stack);
542 Safefree (PL_markstack); 1042 Safefree (PL_markstack);
543 Safefree (PL_scopestack); 1043 Safefree (PL_scopestack);
1044#if HAS_SCOPESTACK_NAME
1045 Safefree (PL_scopestack_name);
1046#endif
544 Safefree (PL_savestack); 1047 Safefree (PL_savestack);
545#if !PERL_VERSION_ATLEAST (5,9,0) 1048#if !PERL_VERSION_ATLEAST (5,10,0)
546 Safefree (PL_retstack); 1049 Safefree (PL_retstack);
547#endif 1050#endif
548} 1051}
549 1052
1053#define CORO_RSS \
1054 rss += sizeof (SYM (curstackinfo)); \
1055 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
1056 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
1057 rss += SYM (tmps_max) * sizeof (SV *); \
1058 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
1059 rss += SYM (scopestack_max) * sizeof (I32); \
1060 rss += SYM (savestack_max) * sizeof (ANY);
1061
1062static size_t
1063coro_rss (pTHX_ struct coro *coro)
1064{
1065 size_t rss = sizeof (*coro);
1066
1067 if (coro->mainstack)
1068 {
1069 if (coro->flags & CF_RUNNING)
1070 {
1071 #define SYM(sym) PL_ ## sym
1072 CORO_RSS;
1073 #undef SYM
1074 }
1075 else
1076 {
1077 #define SYM(sym) coro->slot->sym
1078 CORO_RSS;
1079 #undef SYM
1080 }
1081 }
1082
1083 return rss;
1084}
1085
1086/** provide custom get/set/clear methods for %SIG elements ******************/
1087
1088/* apparently < 5.8.8 */
1089#ifndef MgPV_nolen_const
1090#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
1091 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
1092 (const char*)(mg)->mg_ptr)
1093#endif
1094
1095/* this will be a patched copy of PL_vtbl_sigelem */
1096static MGVTBL coro_sigelem_vtbl;
1097
1098static int ecb_cold
1099coro_sig_copy (pTHX_ SV *sv, MAGIC *mg, SV *nsv, const char *name, I32 namlen)
1100{
1101 char *key = SvPV_nolen ((SV *)name);
1102
1103 /* do what mg_copy normally does */
1104 sv_magic (nsv, mg->mg_obj, PERL_MAGIC_sigelem, name, namlen);
1105 assert (mg_find (nsv, PERL_MAGIC_sigelem)->mg_virtual == &PL_vtbl_sigelem);
1106
1107 /* patch sigelem vtbl, but only for __WARN__ and __DIE__ */
1108 if (*key == '_'
1109 && (strEQ (key, "__DIE__")
1110 || strEQ (key, "__WARN__")))
1111 mg_find (nsv, PERL_MAGIC_sigelem)->mg_virtual = &coro_sigelem_vtbl;
1112
1113 return 1;
1114}
1115
1116/* perl does not have a %SIG vtbl, we provide one so we can override */
1117/* the magic vtbl for the __DIE__ and __WARN__ members */
1118static const MGVTBL coro_sig_vtbl = {
1119 0, 0, 0, 0, 0,
1120 coro_sig_copy
1121};
1122
1123/*
1124 * This overrides the default magic get method of %SIG elements.
1125 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
1126 * and instead of trying to save and restore the hash elements (extremely slow),
1127 * we just provide our own readback here.
1128 */
1129static int ecb_cold
1130coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
1131{
1132 const char *s = MgPV_nolen_const (mg);
1133 /* the key must be either __DIE__ or __WARN__ here */
1134 SV **svp = s[2] == 'D' ? &PL_diehook : &PL_warnhook;
1135
1136 SV *ssv;
1137
1138 if (!*svp)
1139 ssv = &PL_sv_undef;
1140 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1141 ssv = sv_2mortal (newRV_inc (*svp));
1142 else
1143 ssv = *svp;
1144
1145 sv_setsv (sv, ssv);
1146 return 0;
1147}
1148
1149static int ecb_cold
1150coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1151{
1152 const char *s = MgPV_nolen_const (mg);
1153 /* the key must be either __DIE__ or __WARN__ here */
1154 SV **svp = s[2] == 'D' ? &PL_diehook : &PL_warnhook;
1155
1156 SV *old = *svp;
1157 *svp = 0;
1158 SvREFCNT_dec (old);
1159 return 0;
1160}
1161
1162static int ecb_cold
1163coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1164{
1165 const char *s = MgPV_nolen_const (mg);
1166 /* the key must be either __DIE__ or __WARN__ here */
1167 SV **svp = s[2] == 'D' ? &PL_diehook : &PL_warnhook;
1168
1169 SV *old = *svp;
1170 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1171 SvREFCNT_dec (old);
1172 return 0;
1173}
1174
1175static void
1176prepare_nop (pTHX_ struct coro_transfer_args *ta)
1177{
1178 /* kind of mega-hacky, but works */
1179 ta->next = ta->prev = (struct coro *)ta;
1180}
1181
550static void 1182static int
551setup_coro (struct coro *coro) 1183slf_check_nop (pTHX_ struct CoroSLF *frame)
1184{
1185 return 0;
1186}
1187
1188static int
1189slf_check_repeat (pTHX_ struct CoroSLF *frame)
1190{
1191 return 1;
1192}
1193
1194/** coroutine stack handling ************************************************/
1195
1196static UNOP init_perl_op;
1197
1198ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1199init_perl (pTHX_ struct coro *coro)
552{ 1200{
553 /* 1201 /*
554 * emulate part of the perl startup here. 1202 * emulate part of the perl startup here.
555 */ 1203 */
556
557 coro_init_stacks (); 1204 coro_init_stacks (aTHX);
558 1205
1206 PL_runops = RUNOPS_DEFAULT;
1207 PL_curcop = &PL_compiling;
1208 PL_in_eval = EVAL_NULL;
559 PL_curcop = 0; 1209 PL_comppad = 0;
560 PL_in_eval = 0; 1210 PL_comppad_name = 0;
1211 PL_comppad_name_fill = 0;
1212 PL_comppad_name_floor = 0;
561 PL_curpm = 0; 1213 PL_curpm = 0;
1214 PL_curpad = 0;
1215 PL_localizing = 0;
1216 PL_restartop = 0;
1217#if PERL_VERSION_ATLEAST (5,10,0)
1218 PL_parser = 0;
1219#endif
1220 PL_hints = 0;
1221
1222 /* recreate the die/warn hooks */
1223 PL_diehook = SvREFCNT_inc (rv_diehook);
1224 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1225
1226 GvSV (PL_defgv) = newSV (0);
1227 GvAV (PL_defgv) = coro->args; coro->args = 0;
1228 GvSV (PL_errgv) = newSV (0);
1229 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1230 GvHV (PL_hintgv) = newHV ();
1231#if PERL_VERSION_ATLEAST (5,10,0)
1232 hv_magic (GvHV (PL_hintgv), 0, PERL_MAGIC_hints);
1233#endif
1234 PL_rs = newSVsv (GvSV (irsgv));
1235 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
562 1236
563 { 1237 {
564 dSP; 1238 dSP;
565 LOGOP myop; 1239 UNOP myop;
566 1240
567 /* I have no idea why this is needed, but it is */ 1241 Zero (&myop, 1, UNOP);
1242 myop.op_next = Nullop;
1243 myop.op_type = OP_ENTERSUB;
1244 myop.op_flags = OPf_WANT_VOID;
1245
568 PUSHMARK (SP); 1246 PUSHMARK (SP);
569 1247 XPUSHs ((SV *)coro->startcv);
570 SvREFCNT_dec (GvAV (PL_defgv)); 1248 PUTBACK;
571 GvAV (PL_defgv) = coro->args; coro->args = 0;
572
573 Zero (&myop, 1, LOGOP);
574 myop.op_next = Nullop;
575 myop.op_flags = OPf_WANT_VOID;
576
577 PL_op = (OP *)&myop; 1249 PL_op = (OP *)&myop;
578
579 PUSHMARK (SP);
580 XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
581 PUTBACK;
582 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1250 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
583 SPAGAIN;
584
585 ENTER; /* necessary e.g. for dounwind */
586 } 1251 }
587}
588 1252
1253 /* this newly created coroutine might be run on an existing cctx which most
1254 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1255 */
1256 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1257 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1258 slf_frame.destroy = 0;
1259
1260 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1261 init_perl_op.op_next = PL_op;
1262 init_perl_op.op_type = OP_ENTERSUB;
1263 init_perl_op.op_ppaddr = pp_slf;
1264 /* no flags etc. required, as an init function won't be called */
1265
1266 PL_op = (OP *)&init_perl_op;
1267
1268 /* copy throw, in case it was set before init_perl */
1269 CORO_THROW = coro->except;
1270
1271 SWAP_SVS_ENTER (coro);
1272
1273 if (ecb_expect_false (enable_times))
1274 {
1275 coro_times_update ();
1276 coro_times_sub (coro);
1277 }
1278}
1279
589static void 1280static void
1281coro_unwind_stacks (pTHX)
1282{
1283 if (!IN_DESTRUCT)
1284 {
1285 /* restore all saved variables and stuff */
1286 LEAVE_SCOPE (0);
1287 assert (PL_tmps_floor == -1);
1288
1289 /* free all temporaries */
1290 FREETMPS;
1291 assert (PL_tmps_ix == -1);
1292
1293 /* unwind all extra stacks */
1294 POPSTACK_TO (PL_mainstack);
1295
1296 /* unwind main stack */
1297 dounwind (-1);
1298 }
1299}
1300
1301static void
1302destroy_perl (pTHX_ struct coro *coro)
1303{
1304 SV *svf [9];
1305
1306 {
1307 SV *old_current = SvRV (coro_current);
1308 struct coro *current = SvSTATE (old_current);
1309
1310 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1311
1312 save_perl (aTHX_ current);
1313
1314 /* this will cause transfer_check to croak on block*/
1315 SvRV_set (coro_current, (SV *)coro->hv);
1316
1317 load_perl (aTHX_ coro);
1318
1319 /* restore swapped sv's */
1320 SWAP_SVS_LEAVE (coro);
1321
1322 coro_unwind_stacks (aTHX);
1323
1324 coro_destruct_stacks (aTHX);
1325
1326 /* now save some sv's to be free'd later */
1327 svf [0] = GvSV (PL_defgv);
1328 svf [1] = (SV *)GvAV (PL_defgv);
1329 svf [2] = GvSV (PL_errgv);
1330 svf [3] = (SV *)PL_defoutgv;
1331 svf [4] = PL_rs;
1332 svf [5] = GvSV (irsgv);
1333 svf [6] = (SV *)GvHV (PL_hintgv);
1334 svf [7] = PL_diehook;
1335 svf [8] = PL_warnhook;
1336 assert (9 == sizeof (svf) / sizeof (*svf));
1337
1338 SvRV_set (coro_current, old_current);
1339
1340 load_perl (aTHX_ current);
1341 }
1342
1343 {
1344 unsigned int i;
1345
1346 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1347 SvREFCNT_dec (svf [i]);
1348
1349 SvREFCNT_dec (coro->saved_deffh);
1350 SvREFCNT_dec (coro->rouse_cb);
1351 SvREFCNT_dec (coro->invoke_cb);
1352 SvREFCNT_dec (coro->invoke_av);
1353 SvREFCNT_dec (coro->on_enter_xs);
1354 SvREFCNT_dec (coro->on_leave_xs);
1355 }
1356}
1357
1358ecb_inline void
590free_coro_mortal () 1359free_coro_mortal (pTHX)
591{ 1360{
592 if (coro_mortal) 1361 if (ecb_expect_true (coro_mortal))
593 { 1362 {
594 SvREFCNT_dec (coro_mortal); 1363 SvREFCNT_dec ((SV *)coro_mortal);
595 coro_mortal = 0; 1364 coro_mortal = 0;
596 } 1365 }
597} 1366}
598 1367
599static void NOINLINE
600prepare_cctx (coro_stack *cctx)
601{
602 dSP;
603 LOGOP myop;
604
605 Zero (&myop, 1, LOGOP);
606 myop.op_next = PL_op;
607 myop.op_flags = OPf_WANT_VOID;
608
609 sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV (cctx));
610
611 PUSHMARK (SP);
612 XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
613 PUTBACK;
614 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
615 SPAGAIN;
616}
617
618static void 1368static int
619coro_run (void *arg) 1369runops_trace (pTHX)
620{ 1370{
621 /* coro_run is the alternative epilogue of transfer() */ 1371 COP *oldcop = 0;
622 UNLOCK; 1372 int oldcxix = -2;
623 1373
624 /* 1374 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
625 * this is a _very_ stripped down perl interpreter ;) 1375 {
626 */ 1376 PERL_ASYNC_CHECK ();
1377
1378 if (cctx_current->flags & CC_TRACE_ALL)
1379 {
1380 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1381 {
1382 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1383 SV **bot, **top;
1384 AV *av = newAV (); /* return values */
1385 SV **cb;
1386 dSP;
1387
1388 GV *gv = CvGV (cx->blk_sub.cv);
1389 SV *fullname = sv_2mortal (newSV (0));
1390 if (isGV (gv))
1391 gv_efullname3 (fullname, gv, 0);
1392
1393 bot = PL_stack_base + cx->blk_oldsp + 1;
1394 top = cx->blk_gimme == G_ARRAY ? SP + 1
1395 : cx->blk_gimme == G_SCALAR ? bot + 1
1396 : bot;
1397
1398 av_extend (av, top - bot);
1399 while (bot < top)
1400 av_push (av, SvREFCNT_inc_NN (*bot++));
1401
1402 PL_runops = RUNOPS_DEFAULT;
1403 ENTER;
1404 SAVETMPS;
1405 PUSHMARK (SP);
1406 EXTEND (SP, 3);
1407 PUSHs (&PL_sv_no);
1408 PUSHs (fullname);
1409 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1410 PUTBACK;
1411 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1412 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1413 SPAGAIN;
1414 FREETMPS;
1415 LEAVE;
1416 PL_runops = runops_trace;
1417 }
1418
1419 if (oldcop != PL_curcop)
1420 {
1421 oldcop = PL_curcop;
1422
1423 if (PL_curcop != &PL_compiling)
1424 {
1425 SV **cb;
1426
1427 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB && cxstack_ix >= 0)
1428 {
1429 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1430
1431 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1432 {
1433 dSP;
1434 GV *gv = CvGV (cx->blk_sub.cv);
1435 SV *fullname = sv_2mortal (newSV (0));
1436
1437 if (isGV (gv))
1438 gv_efullname3 (fullname, gv, 0);
1439
1440 PL_runops = RUNOPS_DEFAULT;
1441 ENTER;
1442 SAVETMPS;
1443 PUSHMARK (SP);
1444 EXTEND (SP, 3);
1445 PUSHs (&PL_sv_yes);
1446 PUSHs (fullname);
1447 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc (SUB_ARGARRAY)) : &PL_sv_undef);
1448 PUTBACK;
1449 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1450 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1451 SPAGAIN;
1452 FREETMPS;
1453 LEAVE;
1454 PL_runops = runops_trace;
1455 }
1456
1457 oldcxix = cxstack_ix;
1458 }
1459
1460 if (cctx_current->flags & CC_TRACE_LINE)
1461 {
1462 dSP;
1463
1464 PL_runops = RUNOPS_DEFAULT;
1465 ENTER;
1466 SAVETMPS;
1467 PUSHMARK (SP);
1468 EXTEND (SP, 2);
1469 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1470 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1471 PUTBACK;
1472 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1473 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1474 SPAGAIN;
1475 FREETMPS;
1476 LEAVE;
1477 PL_runops = runops_trace;
1478 }
1479 }
1480 }
1481 }
1482 }
1483
1484 TAINT_NOT;
1485 return 0;
1486}
1487
1488static struct CoroSLF cctx_ssl_frame;
1489
1490static void
1491slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1492{
1493 ta->prev = 0;
1494}
1495
1496static int
1497slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1498{
1499 *frame = cctx_ssl_frame;
1500
1501 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1502}
1503
1504/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1505static void ecb_noinline
1506cctx_prepare (pTHX)
1507{
627 PL_top_env = &PL_start_env; 1508 PL_top_env = &PL_start_env;
1509
1510 if (cctx_current->flags & CC_TRACE)
1511 PL_runops = runops_trace;
1512
1513 /* we already must be executing an SLF op, there is no other valid way
1514 * that can lead to creation of a new cctx */
1515 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1516 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1517
1518 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1519 cctx_ssl_frame = slf_frame;
1520
1521 slf_frame.prepare = slf_prepare_set_stacklevel;
1522 slf_frame.check = slf_check_set_stacklevel;
1523}
1524
1525/* the tail of transfer: execute stuff we can only do after a transfer */
1526ecb_inline void
1527transfer_tail (pTHX)
1528{
1529 free_coro_mortal (aTHX);
1530}
1531
1532/* try to exit the same way perl's main function would do */
1533/* we do not bother resetting the environment or other things *7
1534/* that are not, uhm, essential */
1535/* this obviously also doesn't work when perl is embedded */
1536static void ecb_noinline ecb_cold
1537perlish_exit (pTHX)
1538{
1539 int exitstatus = perl_destruct (PL_curinterp);
1540 perl_free (PL_curinterp);
1541 exit (exitstatus);
1542}
1543
1544/*
1545 * this is a _very_ stripped down perl interpreter ;)
1546 */
1547static void
1548cctx_run (void *arg)
1549{
1550#ifdef USE_ITHREADS
1551# if CORO_PTHREAD
1552 PERL_SET_CONTEXT (coro_thx);
1553# endif
1554#endif
1555 {
1556 dTHX;
1557
1558 /* normally we would need to skip the entersub here */
1559 /* not doing so will re-execute it, which is exactly what we want */
1560 /* PL_nop = PL_nop->op_next */
1561
628 /* inject call to cctx_init */ 1562 /* inject a fake subroutine call to cctx_init */
629 prepare_cctx ((coro_stack *)arg); 1563 cctx_prepare (aTHX);
630 1564
1565 /* cctx_run is the alternative tail of transfer() */
1566 transfer_tail (aTHX);
1567
631 /* somebody will hit me for both perl_run and PL_restartop */ 1568 /* somebody or something will hit me for both perl_run and PL_restartop */
1569 PL_restartop = PL_op;
632 perl_run (PL_curinterp); 1570 perl_run (PL_curinterp);
1571 /*
1572 * Unfortunately, there is no way to get at the return values of the
1573 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1574 * runtime errors here, as this is just a random interpreter, not a thread.
1575 */
633 1576
634 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1577 /*
635 abort (); 1578 * pp_entersub in 5.24 no longer ENTERs, but perl_destruct
636} 1579 * requires PL_scopestack_ix, so do it here if required.
1580 */
1581 if (!PL_scopestack_ix)
1582 ENTER;
637 1583
1584 /*
1585 * If perl-run returns we assume exit() was being called or the coro
1586 * fell off the end, which seems to be the only valid (non-bug)
1587 * reason for perl_run to return. We try to mimic whatever perl is normally
1588 * doing in that case. YMMV.
1589 */
1590 perlish_exit (aTHX);
1591 }
1592}
1593
638static coro_stack * 1594static coro_cctx *
639stack_new () 1595cctx_new (void)
640{ 1596{
641 coro_stack *stack; 1597 coro_cctx *cctx;
642 1598
1599 ++cctx_count;
643 New (0, stack, 1, coro_stack); 1600 New (0, cctx, 1, coro_cctx);
644 1601
645#if HAVE_MMAP 1602 cctx->gen = cctx_gen;
1603 cctx->flags = 0;
1604 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
646 1605
647 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1606 return cctx;
648 /* mmap suppsedly does allocate-on-write for us */ 1607}
649 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
650 1608
651 if (stack->sptr == (void *)-1) 1609/* create a new cctx only suitable as source */
1610static coro_cctx *
1611cctx_new_empty (void)
1612{
1613 coro_cctx *cctx = cctx_new ();
1614
1615 cctx->stack.sptr = 0;
1616 coro_create (&cctx->cctx, 0, 0, 0, 0);
1617
1618 return cctx;
1619}
1620
1621/* create a new cctx suitable as destination/running a perl interpreter */
1622static coro_cctx *
1623cctx_new_run (void)
1624{
1625 coro_cctx *cctx = cctx_new ();
1626
1627 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
652 { 1628 {
653 perror ("FATAL: unable to mmap stack for coroutine"); 1629 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
654 _exit (EXIT_FAILURE); 1630 _exit (EXIT_FAILURE);
655 } 1631 }
656 1632
657# if STACKGUARD 1633 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
658 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
659# endif
660 1634
661#else
662
663 stack->ssize = STACKSIZE * (long)sizeof (long);
664 New (0, stack->sptr, STACKSIZE, long);
665
666 if (!stack->sptr)
667 {
668 perror (stderr, "FATAL: unable to malloc stack for coroutine");
669 _exit (EXIT_FAILURE);
670 }
671
672#endif
673
674#if USE_VALGRIND
675 stack->valgrind_id = VALGRIND_STACK_REGISTER (
676 STACKGUARD * PAGESIZE + (char *)stack->sptr,
677 stack->ssize + (char *)stack->sptr
678 );
679#endif
680
681 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
682
683 return stack; 1635 return cctx;
684} 1636}
685 1637
686static void 1638static void
687stack_free (coro_stack *stack) 1639cctx_destroy (coro_cctx *cctx)
688{ 1640{
689 if (!stack) 1641 if (!cctx)
690 return; 1642 return;
691 1643
692#if USE_VALGRIND 1644 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
693 VALGRIND_STACK_DEREGISTER (stack->valgrind_id);
694#endif
695 1645
696#if HAVE_MMAP 1646 --cctx_count;
697 munmap (stack->sptr, stack->ssize); 1647 coro_destroy (&cctx->cctx);
698#else
699 Safefree (stack->sptr);
700#endif
701 1648
1649 coro_stack_free (&cctx->stack);
1650
702 Safefree (stack); 1651 Safefree (cctx);
703} 1652}
704 1653
705static coro_stack *stack_first; 1654/* wether this cctx should be destructed */
706static int cctx_count, cctx_idle; 1655#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
707 1656
708static coro_stack * 1657static coro_cctx *
709stack_get () 1658cctx_get (pTHX)
710{ 1659{
711 coro_stack *stack; 1660 while (ecb_expect_true (cctx_first))
712
713 if (stack_first)
714 { 1661 {
1662 coro_cctx *cctx = cctx_first;
1663 cctx_first = cctx->next;
715 --cctx_idle; 1664 --cctx_idle;
716 stack = stack_first; 1665
717 stack_first = stack->next; 1666 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
718 } 1667 return cctx;
719 else 1668
720 { 1669 cctx_destroy (cctx);
721 ++cctx_count;
722 stack = stack_new ();
723 PL_op = PL_op->op_next;
724 } 1670 }
725 1671
726 return stack; 1672 return cctx_new_run ();
727} 1673}
728 1674
729static void 1675static void
730stack_put (coro_stack *stack) 1676cctx_put (coro_cctx *cctx)
731{ 1677{
1678 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1679
1680 /* free another cctx if overlimit */
1681 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1682 {
1683 coro_cctx *first = cctx_first;
1684 cctx_first = first->next;
1685 --cctx_idle;
1686
1687 cctx_destroy (first);
1688 }
1689
732 ++cctx_idle; 1690 ++cctx_idle;
733 stack->next = stack_first; 1691 cctx->next = cctx_first;
734 stack_first = stack; 1692 cctx_first = cctx;
735} 1693}
736 1694
737/* never call directly, always through the coro_state_transfer global variable */ 1695/** coroutine switching *****************************************************/
738static void NOINLINE 1696
1697static void
1698transfer_check (pTHX_ struct coro *prev, struct coro *next)
1699{
1700 /* TODO: throwing up here is considered harmful */
1701
1702 if (ecb_expect_true (prev != next))
1703 {
1704 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1705 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1706
1707 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1708 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1709
1710#if !PERL_VERSION_ATLEAST (5,10,0)
1711 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1712 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1713#endif
1714 }
1715}
1716
1717/* always use the TRANSFER macro */
1718static void ecb_noinline /* noinline so we have a fixed stackframe */
739transfer (struct coro *prev, struct coro *next, int flags) 1719transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
740{ 1720{
741 dSTACKLEVEL; 1721 dSTACKLEVEL;
742 1722
743 /* sometimes transfer is only called to set idle_sp */ 1723 /* sometimes transfer is only called to set idle_sp */
744 if (flags == TRANSFER_SET_STACKLEVEL) 1724 if (ecb_expect_false (!prev))
745 ((coro_stack *)prev)->idle_sp = STACKLEVEL; 1725 {
746 else if (prev != next) 1726 cctx_current->idle_sp = STACKLEVEL;
1727 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
747 { 1728 }
748 coro_stack *prev__stack; 1729 else if (ecb_expect_true (prev != next))
1730 {
1731 coro_cctx *cctx_prev;
749 1732
750 LOCK; 1733 if (ecb_expect_false (prev->flags & CF_NEW))
751
752 if (next->mainstack)
753 { 1734 {
754 /* coroutine already started */ 1735 /* create a new empty/source context */
755 SAVE (prev, flags); 1736 prev->flags &= ~CF_NEW;
756 LOAD (next); 1737 prev->flags |= CF_RUNNING;
1738 }
1739
1740 prev->flags &= ~CF_RUNNING;
1741 next->flags |= CF_RUNNING;
1742
1743 /* first get rid of the old state */
1744 save_perl (aTHX_ prev);
1745
1746 if (ecb_expect_false (next->flags & CF_NEW))
1747 {
1748 /* need to start coroutine */
1749 next->flags &= ~CF_NEW;
1750 /* setup coroutine call */
1751 init_perl (aTHX_ next);
757 } 1752 }
758 else 1753 else
1754 load_perl (aTHX_ next);
1755
1756 /* possibly untie and reuse the cctx */
1757 if (ecb_expect_true (
1758 cctx_current->idle_sp == STACKLEVEL
1759 && !(cctx_current->flags & CC_TRACE)
1760 && !force_cctx
1761 ))
759 { 1762 {
760 /* need to start coroutine */ 1763 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
761 /* first get rid of the old state */ 1764 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
762 SAVE (prev, -1); 1765
763 /* setup coroutine call */ 1766 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
764 setup_coro (next); 1767 /* without this the next cctx_get might destroy the running cctx while still in use */
765 /* need a stack */ 1768 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
766 next->stack = 0; 1769 if (ecb_expect_true (!next->cctx))
1770 next->cctx = cctx_get (aTHX);
1771
1772 cctx_put (cctx_current);
767 } 1773 }
1774 else
1775 prev->cctx = cctx_current;
768 1776
769 if (!prev->stack) 1777 ++next->usecount;
770 /* create a new empty context */
771 Newz (0, prev->stack, 1, coro_stack);
772 1778
773 prev__stack = prev->stack; 1779 cctx_prev = cctx_current;
1780 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
774 1781
775 /* possibly "free" the stack */ 1782 next->cctx = 0;
776 if (prev__stack->idle_sp == STACKLEVEL) 1783
1784 if (ecb_expect_false (cctx_prev != cctx_current))
777 { 1785 {
778 stack_put (prev__stack); 1786 cctx_prev->top_env = PL_top_env;
779 prev->stack = 0; 1787 PL_top_env = cctx_current->top_env;
1788 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
780 } 1789 }
781 1790
782 if (!next->stack) 1791 transfer_tail (aTHX);
783 next->stack = stack_get ();
784
785 if (prev__stack != next->stack)
786 {
787 prev__stack->top_env = PL_top_env;
788 PL_top_env = next->stack->top_env;
789 coro_transfer (&prev__stack->cctx, &next->stack->cctx);
790 }
791
792 free_coro_mortal ();
793
794 UNLOCK;
795 } 1792 }
796} 1793}
797 1794
798struct transfer_args 1795#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
799{
800 struct coro *prev, *next;
801 int flags;
802};
803
804#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags) 1796#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
805 1797
1798/** high level stuff ********************************************************/
1799
1800/* this function is actually Coro, not Coro::State, but we call it from here */
1801/* because it is convenient - but it hasn't been declared yet for that reason */
806static void 1802static void
1803coro_call_on_destroy (pTHX_ struct coro *coro);
1804
1805static void
807coro_state_destroy (struct coro *coro) 1806coro_state_destroy (pTHX_ struct coro *coro)
808{ 1807{
809 if (coro->refcnt--) 1808 if (coro->flags & CF_ZOMBIE)
810 return; 1809 return;
811 1810
812 if (coro->mainstack && coro->mainstack != main_mainstack) 1811 slf_destroy (aTHX_ coro);
813 {
814 struct coro temp;
815 1812
816 SAVE ((&temp), TRANSFER_SAVE_ALL); 1813 coro->flags |= CF_ZOMBIE;
817 LOAD (coro);
818 1814
819 coro_destroy_stacks (); 1815 if (coro->flags & CF_READY)
820
821 LOAD ((&temp)); /* this will get rid of defsv etc.. */
822
823 coro->mainstack = 0;
824 } 1816 {
1817 /* reduce nready, as destroying a ready coro effectively unreadies it */
1818 /* alternative: look through all ready queues and remove the coro */
1819 --coro_nready;
1820 }
1821 else
1822 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
825 1823
826 stack_free (coro->stack); 1824 if (coro->next) coro->next->prev = coro->prev;
1825 if (coro->prev) coro->prev->next = coro->next;
1826 if (coro == coro_first) coro_first = coro->next;
1827
1828 if (coro->mainstack
1829 && coro->mainstack != main_mainstack
1830 && coro->slot
1831 && !PL_dirty)
1832 destroy_perl (aTHX_ coro);
1833
1834 cctx_destroy (coro->cctx);
1835 SvREFCNT_dec (coro->startcv);
827 SvREFCNT_dec (coro->args); 1836 SvREFCNT_dec (coro->args);
828 Safefree (coro); 1837 SvREFCNT_dec (coro->swap_sv);
1838 SvREFCNT_dec (CORO_THROW);
1839
1840 coro_call_on_destroy (aTHX_ coro);
1841
1842 /* more destruction mayhem in coro_state_free */
829} 1843}
830 1844
831static int 1845static int
832coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1846coro_state_free (pTHX_ SV *sv, MAGIC *mg)
833{ 1847{
834 struct coro *coro = (struct coro *)mg->mg_ptr; 1848 struct coro *coro = (struct coro *)mg->mg_ptr;
835 mg->mg_ptr = 0; 1849 mg->mg_ptr = 0;
836 1850
837 coro_state_destroy (coro); 1851 coro_state_destroy (aTHX_ coro);
1852 SvREFCNT_dec (coro->on_destroy);
1853 SvREFCNT_dec (coro->status);
1854
1855 Safefree (coro);
838 1856
839 return 0; 1857 return 0;
840} 1858}
841 1859
842static int 1860static int ecb_cold
843coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1861coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
844{ 1862{
845 struct coro *coro = (struct coro *)mg->mg_ptr; 1863 /* called when perl clones the current process the slow way (windows process emulation) */
846 1864 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
847 ++coro->refcnt; 1865 mg->mg_ptr = 0;
1866 mg->mg_virtual = 0;
848 1867
849 return 0; 1868 return 0;
850} 1869}
851 1870
852static MGVTBL coro_state_vtbl = { 1871static MGVTBL coro_state_vtbl = {
853 0, 0, 0, 0, 1872 0, 0, 0, 0,
854 coro_state_clear, 1873 coro_state_free,
855 0, 1874 0,
856#ifdef MGf_DUP 1875#ifdef MGf_DUP
857 coro_state_dup, 1876 coro_state_dup,
858#else 1877#else
859# define MGf_DUP 0 1878# define MGf_DUP 0
860#endif 1879#endif
861}; 1880};
862 1881
863static struct coro *
864SvSTATE (SV *coro)
865{
866 HV *stash;
867 MAGIC *mg;
868
869 if (SvROK (coro))
870 coro = SvRV (coro);
871
872 stash = SvSTASH (coro);
873 if (stash != coro_stash && stash != coro_state_stash)
874 {
875 /* very slow, but rare, check */
876 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
877 croak ("Coro::State object required");
878 }
879
880 mg = SvMAGIC (coro);
881 assert (mg->mg_type == PERL_MAGIC_ext);
882 return (struct coro *)mg->mg_ptr;
883}
884
885static void 1882static void
886prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1883prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
887{ 1884{
888 ta->prev = SvSTATE (prev); 1885 ta->prev = SvSTATE (prev_sv);
889 ta->next = SvSTATE (next); 1886 ta->next = SvSTATE (next_sv);
890 ta->flags = flags; 1887 TRANSFER_CHECK (*ta);
891} 1888}
892 1889
893static void 1890static void
894api_transfer (SV *prev, SV *next, int flags) 1891api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1892{
1893 struct coro_transfer_args ta;
1894
1895 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1896 TRANSFER (ta, 1);
1897}
1898
1899/** Coro ********************************************************************/
1900
1901ecb_inline void
1902coro_enq (pTHX_ struct coro *coro)
1903{
1904 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1905
1906 SvREFCNT_inc_NN (coro->hv);
1907
1908 coro->next_ready = 0;
1909 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1910 ready [1] = coro;
1911}
1912
1913ecb_inline struct coro *
1914coro_deq (pTHX)
1915{
1916 int prio;
1917
1918 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1919 {
1920 struct coro **ready = coro_ready [prio];
1921
1922 if (ready [0])
1923 {
1924 struct coro *coro = ready [0];
1925 ready [0] = coro->next_ready;
1926 return coro;
1927 }
1928 }
1929
1930 return 0;
1931}
1932
1933static void
1934invoke_sv_ready_hook_helper (void)
895{ 1935{
896 dTHX; 1936 dTHX;
1937 dSP;
1938
1939 ENTER;
1940 SAVETMPS;
1941
1942 PUSHMARK (SP);
1943 PUTBACK;
1944 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1945
1946 FREETMPS;
1947 LEAVE;
1948}
1949
1950static int
1951api_ready (pTHX_ SV *coro_sv)
1952{
1953 struct coro *coro = SvSTATE (coro_sv);
1954
1955 if (coro->flags & CF_READY)
1956 return 0;
1957
1958 coro->flags |= CF_READY;
1959
1960 coro_enq (aTHX_ coro);
1961
1962 if (!coro_nready++)
1963 if (coroapi.readyhook)
1964 coroapi.readyhook ();
1965
1966 return 1;
1967}
1968
1969static int
1970api_is_ready (pTHX_ SV *coro_sv)
1971{
1972 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1973}
1974
1975/* expects to own a reference to next->hv */
1976ecb_inline void
1977prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1978{
1979 SV *prev_sv = SvRV (coro_current);
1980
1981 ta->prev = SvSTATE_hv (prev_sv);
1982 ta->next = next;
1983
1984 TRANSFER_CHECK (*ta);
1985
1986 SvRV_set (coro_current, (SV *)next->hv);
1987
1988 free_coro_mortal (aTHX);
1989 coro_mortal = prev_sv;
1990}
1991
1992static void
1993prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1994{
1995 for (;;)
1996 {
1997 struct coro *next = coro_deq (aTHX);
1998
1999 if (ecb_expect_true (next))
2000 {
2001 /* cannot transfer to destroyed coros, skip and look for next */
2002 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
2003 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
2004 else
2005 {
2006 next->flags &= ~CF_READY;
2007 --coro_nready;
2008
2009 prepare_schedule_to (aTHX_ ta, next);
2010 break;
2011 }
2012 }
2013 else
2014 {
2015 /* nothing to schedule: call the idle handler */
2016 if (SvROK (sv_idle)
2017 && SvOBJECT (SvRV (sv_idle)))
2018 {
2019 if (SvRV (sv_idle) == SvRV (coro_current))
2020 {
2021 require_pv ("Carp");
2022
2023 {
2024 dSP;
2025
2026 ENTER;
2027 SAVETMPS;
2028
2029 PUSHMARK (SP);
2030 XPUSHs (sv_2mortal (newSVpv ("FATAL: $Coro::idle blocked itself - did you try to block inside an event loop callback? Caught", 0)));
2031 PUTBACK;
2032 call_pv ("Carp::confess", G_VOID | G_DISCARD);
2033
2034 FREETMPS;
2035 LEAVE;
2036 }
2037 }
2038
2039 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
2040 api_ready (aTHX_ SvRV (sv_idle));
2041 --coro_nready;
2042 }
2043 else
2044 {
2045 /* TODO: deprecated, remove, cannot work reliably *//*D*/
2046 dSP;
2047
2048 ENTER;
2049 SAVETMPS;
2050
2051 PUSHMARK (SP);
2052 PUTBACK;
2053 call_sv (sv_idle, G_VOID | G_DISCARD);
2054
2055 FREETMPS;
2056 LEAVE;
2057 }
2058 }
2059 }
2060}
2061
2062ecb_inline void
2063prepare_cede (pTHX_ struct coro_transfer_args *ta)
2064{
2065 api_ready (aTHX_ coro_current);
2066 prepare_schedule (aTHX_ ta);
2067}
2068
2069ecb_inline void
2070prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
2071{
2072 SV *prev = SvRV (coro_current);
2073
2074 if (coro_nready)
2075 {
2076 prepare_schedule (aTHX_ ta);
2077 api_ready (aTHX_ prev);
2078 }
2079 else
2080 prepare_nop (aTHX_ ta);
2081}
2082
2083static void
2084api_schedule (pTHX)
2085{
897 struct transfer_args ta; 2086 struct coro_transfer_args ta;
898 2087
899 prepare_transfer (&ta, prev, next, flags); 2088 prepare_schedule (aTHX_ &ta);
900 TRANSFER (ta); 2089 TRANSFER (ta, 1);
901} 2090}
902 2091
903/** Coro ********************************************************************/ 2092static void
2093api_schedule_to (pTHX_ SV *coro_sv)
2094{
2095 struct coro_transfer_args ta;
2096 struct coro *next = SvSTATE (coro_sv);
904 2097
905#define PRIO_MAX 3 2098 SvREFCNT_inc_NN (coro_sv);
906#define PRIO_HIGH 1 2099 prepare_schedule_to (aTHX_ &ta, next);
907#define PRIO_NORMAL 0 2100}
908#define PRIO_LOW -1
909#define PRIO_IDLE -3
910#define PRIO_MIN -4
911 2101
912/* for Coro.pm */
913static GV *coro_current, *coro_idle;
914static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
915static int coro_nready;
916
917static void 2102static int
918coro_enq (SV *sv) 2103api_cede (pTHX)
919{ 2104{
920 int prio; 2105 struct coro_transfer_args ta;
921 2106
922 if (SvTYPE (sv) != SVt_PVHV) 2107 prepare_cede (aTHX_ &ta);
923 croak ("Coro::ready tried to enqueue something that is not a coroutine");
924 2108
925 prio = SvSTATE (sv)->prio; 2109 if (ecb_expect_true (ta.prev != ta.next))
2110 {
2111 TRANSFER (ta, 1);
2112 return 1;
2113 }
2114 else
2115 return 0;
2116}
926 2117
927 av_push (coro_ready [prio - PRIO_MIN], sv); 2118static int
2119api_cede_notself (pTHX)
2120{
928 coro_nready++; 2121 if (coro_nready)
929} 2122 {
2123 struct coro_transfer_args ta;
930 2124
931static SV * 2125 prepare_cede_notself (aTHX_ &ta);
932coro_deq (int min_prio) 2126 TRANSFER (ta, 1);
933{ 2127 return 1;
934 int prio = PRIO_MAX - PRIO_MIN; 2128 }
2129 else
2130 return 0;
2131}
935 2132
936 min_prio -= PRIO_MIN; 2133static void
937 if (min_prio < 0) 2134api_trace (pTHX_ SV *coro_sv, int flags)
938 min_prio = 0; 2135{
2136 struct coro *coro = SvSTATE (coro_sv);
939 2137
940 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2138 if (coro->flags & CF_RUNNING)
941 if (AvFILLp (coro_ready [prio]) >= 0) 2139 croak ("cannot enable tracing on a running coroutine, caught");
2140
2141 if (flags & CC_TRACE)
2142 {
2143 if (!coro->cctx)
2144 coro->cctx = cctx_new_run ();
2145 else if (!(coro->cctx->flags & CC_TRACE))
2146 croak ("cannot enable tracing on coroutine with custom stack, caught");
2147
2148 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2149 }
2150 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2151 {
2152 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2153
2154 if (coro->flags & CF_RUNNING)
2155 PL_runops = RUNOPS_DEFAULT;
2156 else
2157 coro->slot->runops = RUNOPS_DEFAULT;
2158 }
2159}
2160
2161static void
2162coro_push_av (pTHX_ AV *av, I32 gimme_v)
2163{
2164 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2165 {
2166 dSP;
2167
2168 if (gimme_v == G_SCALAR)
2169 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2170 else
942 { 2171 {
943 coro_nready--; 2172 int i;
944 return av_shift (coro_ready [prio]); 2173 EXTEND (SP, AvFILLp (av) + 1);
2174
2175 for (i = 0; i <= AvFILLp (av); ++i)
2176 PUSHs (AvARRAY (av)[i]);
945 } 2177 }
2178
2179 PUTBACK;
2180 }
2181}
2182
2183static void
2184coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2185{
2186 if (!coro->on_destroy)
2187 coro->on_destroy = newAV ();
2188
2189 av_push (coro->on_destroy, cb);
2190}
2191
2192static void
2193slf_destroy_join (pTHX_ struct CoroSLF *frame)
2194{
2195 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2196}
2197
2198static int
2199slf_check_join (pTHX_ struct CoroSLF *frame)
2200{
2201 struct coro *coro = (struct coro *)frame->data;
2202
2203 if (!coro->status)
2204 return 1;
2205
2206 frame->destroy = 0;
2207
2208 coro_push_av (aTHX_ coro->status, GIMME_V);
2209
2210 SvREFCNT_dec ((SV *)coro->hv);
946 2211
947 return 0; 2212 return 0;
948} 2213}
949 2214
950static void 2215static void
951api_ready (SV *coro) 2216slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
952{ 2217{
953 dTHX; 2218 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
954 2219
955 if (SvROK (coro)) 2220 if (items > 1)
956 coro = SvRV (coro); 2221 croak ("join called with too many arguments");
957 2222
958 LOCK; 2223 if (coro->status)
959 coro_enq (SvREFCNT_inc (coro)); 2224 frame->prepare = prepare_nop;
960 UNLOCK; 2225 else
961} 2226 {
962 2227 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
963static void 2228 frame->prepare = prepare_schedule;
964prepare_schedule (struct transfer_args *ta)
965{
966 SV *current, *prev, *next;
967
968 current = GvSV (coro_current);
969
970 for (;;)
971 { 2229 }
972 LOCK;
973 next = coro_deq (PRIO_MIN);
974 UNLOCK;
975 2230
2231 frame->check = slf_check_join;
2232 frame->destroy = slf_destroy_join;
2233 frame->data = (void *)coro;
2234 SvREFCNT_inc (coro->hv);
2235}
2236
2237static void
2238coro_call_on_destroy (pTHX_ struct coro *coro)
2239{
2240 AV *od = coro->on_destroy;
2241
2242 if (!od)
2243 return;
2244
2245 coro->on_destroy = 0;
2246 sv_2mortal ((SV *)od);
2247
2248 while (AvFILLp (od) >= 0)
2249 {
2250 SV *cb = sv_2mortal (av_pop (od));
2251
2252 /* coro hv's (and only hv's at the moment) are supported as well */
2253 if (SvSTATEhv_p (aTHX_ cb))
2254 api_ready (aTHX_ cb);
2255 else
2256 {
2257 dSP; /* don't disturb outer sp */
2258 PUSHMARK (SP);
2259
2260 if (coro->status)
2261 {
2262 PUTBACK;
2263 coro_push_av (aTHX_ coro->status, G_ARRAY);
2264 SPAGAIN;
2265 }
2266
2267 PUTBACK;
2268 call_sv (cb, G_VOID | G_DISCARD);
2269 }
2270 }
2271}
2272
2273static void
2274coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2275{
2276 AV *av;
2277
2278 if (coro->status)
2279 {
2280 av = coro->status;
2281 av_clear (av);
2282 }
2283 else
2284 av = coro->status = newAV ();
2285
2286 /* items are actually not so common, so optimise for this case */
2287 if (items)
2288 {
2289 int i;
2290
2291 av_extend (av, items - 1);
2292
2293 for (i = 0; i < items; ++i)
2294 av_push (av, SvREFCNT_inc_NN (arg [i]));
2295 }
2296}
2297
2298static void
2299slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2300{
2301 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2302 api_ready (aTHX_ sv_manager);
2303
2304 frame->prepare = prepare_schedule;
2305 frame->check = slf_check_repeat;
2306
2307 /* as a minor optimisation, we could unwind all stacks here */
2308 /* but that puts extra pressure on pp_slf, and is not worth much */
2309 /*coro_unwind_stacks (aTHX);*/
2310}
2311
2312static void
2313slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2314{
2315 HV *coro_hv = (HV *)SvRV (coro_current);
2316
2317 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2318 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2319}
2320
2321static void
2322slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2323{
2324 HV *coro_hv;
2325 struct coro *coro;
2326
2327 if (items <= 0)
2328 croak ("Coro::cancel called without coro object,");
2329
2330 coro = SvSTATE (arg [0]);
2331 coro_hv = coro->hv;
2332
2333 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2334
2335 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2336 {
2337 /* coro currently busy cancelling something, so just notify it */
2338 coro->slf_frame.data = (void *)coro;
2339
2340 frame->prepare = prepare_nop;
2341 frame->check = slf_check_nop;
2342 }
2343 else if (coro_hv == (HV *)SvRV (coro_current))
2344 {
2345 /* cancelling the current coro is allowed, and equals terminate */
2346 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2347 }
2348 else
2349 {
2350 struct coro *self = SvSTATE_current;
2351
976 if (next) 2352 if (!self)
977 break; 2353 croak ("Coro::cancel called outside of thread content,");
2354
2355 /* otherwise we cancel directly, purely for speed reasons
2356 * unfortunately, this requires some magic trickery, as
2357 * somebody else could cancel us, so we have to fight the cancellation.
2358 * this is ugly, and hopefully fully worth the extra speed.
2359 * besides, I can't get the slow-but-safe version working...
2360 */
2361 slf_frame.data = 0;
2362 self->flags |= CF_NOCANCEL;
2363 coro_state_destroy (aTHX_ coro);
2364 self->flags &= ~CF_NOCANCEL;
2365
2366 if (slf_frame.data)
2367 {
2368 /* while we were busy we have been cancelled, so terminate */
2369 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2370 }
2371 else
2372 {
2373 frame->prepare = prepare_nop;
2374 frame->check = slf_check_nop;
2375 }
2376 }
2377}
2378
2379static int
2380slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2381{
2382 frame->prepare = 0;
2383 coro_unwind_stacks (aTHX);
2384
2385 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2386
2387 return 1;
2388}
2389
2390static int
2391safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2392{
2393 if (coro->cctx)
2394 croak ("coro inside C callback, unable to cancel at this time, caught");
2395
2396 if (coro->flags & (CF_NEW | CF_ZOMBIE))
2397 {
2398 coro_set_status (aTHX_ coro, arg, items);
2399 coro_state_destroy (aTHX_ coro);
2400 }
2401 else
2402 {
2403 if (!coro->slf_frame.prepare)
2404 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2405
2406 slf_destroy (aTHX_ coro);
2407
2408 coro_set_status (aTHX_ coro, arg, items);
2409 coro->slf_frame.prepare = prepare_nop;
2410 coro->slf_frame.check = slf_check_safe_cancel;
2411
2412 api_ready (aTHX_ (SV *)coro->hv);
2413 }
2414
2415 return 1;
2416}
2417
2418/*****************************************************************************/
2419/* async pool handler */
2420
2421static int
2422slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2423{
2424 HV *hv = (HV *)SvRV (coro_current);
2425 struct coro *coro = (struct coro *)frame->data;
2426
2427 if (!coro->invoke_cb)
2428 return 1; /* loop till we have invoke */
2429 else
2430 {
2431 hv_store (hv, "desc", sizeof ("desc") - 1,
2432 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2433
2434 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
978 2435
979 { 2436 {
980 dSP; 2437 dSP;
981 2438 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
982 ENTER;
983 SAVETMPS;
984
985 PUSHMARK (SP);
986 PUTBACK; 2439 PUTBACK;
987 call_sv (GvSV (coro_idle), G_DISCARD);
988
989 FREETMPS;
990 LEAVE;
991 } 2440 }
2441
2442 SvREFCNT_dec (GvAV (PL_defgv));
2443 GvAV (PL_defgv) = coro->invoke_av;
2444 coro->invoke_av = 0;
2445
2446 return 0;
2447 }
2448}
2449
2450static void
2451slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2452{
2453 HV *hv = (HV *)SvRV (coro_current);
2454 struct coro *coro = SvSTATE_hv ((SV *)hv);
2455
2456 if (ecb_expect_true (coro->saved_deffh))
992 } 2457 {
2458 /* subsequent iteration */
2459 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2460 coro->saved_deffh = 0;
993 2461
994 prev = SvRV (current); 2462 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
995 SvRV (current) = next; 2463 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2464 {
2465 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2466 return;
2467 }
2468 else
2469 {
2470 av_clear (GvAV (PL_defgv));
2471 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
996 2472
997 /* free this only after the transfer */ 2473 if (ecb_expect_false (coro->swap_sv))
998 LOCK; 2474 {
999 free_coro_mortal (); 2475 SWAP_SVS_LEAVE (coro);
1000 UNLOCK; 2476 SvREFCNT_dec_NN (coro->swap_sv);
1001 coro_mortal = prev; 2477 coro->swap_sv = 0;
2478 }
1002 2479
1003 ta->prev = SvSTATE (prev); 2480 coro->prio = 0;
1004 ta->next = SvSTATE (next);
1005 ta->flags = TRANSFER_SAVE_ALL;
1006}
1007 2481
2482 if (ecb_expect_false (coro->cctx) && ecb_expect_false (coro->cctx->flags & CC_TRACE))
2483 api_trace (aTHX_ coro_current, 0);
2484
2485 frame->prepare = prepare_schedule;
2486 av_push (av_async_pool, SvREFCNT_inc (hv));
2487 }
2488 }
2489 else
2490 {
2491 /* first iteration, simply fall through */
2492 frame->prepare = prepare_nop;
2493 }
2494
2495 frame->check = slf_check_pool_handler;
2496 frame->data = (void *)coro;
2497}
2498
2499/*****************************************************************************/
2500/* rouse callback */
2501
2502#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2503
2504static void
2505coro_rouse_callback (pTHX_ CV *cv)
2506{
2507 dXSARGS;
2508 SV *data = (SV *)S_GENSUB_ARG;
2509
2510 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2511 {
2512 /* first call, set args */
2513 SV *coro = SvRV (data);
2514 AV *av = newAV ();
2515
2516 SvRV_set (data, (SV *)av);
2517
2518 /* better take a full copy of the arguments */
2519 while (items--)
2520 av_store (av, items, newSVsv (ST (items)));
2521
2522 api_ready (aTHX_ coro);
2523 SvREFCNT_dec (coro);
2524 }
2525
2526 XSRETURN_EMPTY;
2527}
2528
1008static void 2529static int
2530slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2531{
2532 SV *data = (SV *)frame->data;
2533
2534 if (CORO_THROW)
2535 return 0;
2536
2537 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2538 return 1;
2539
2540 /* now push all results on the stack */
2541 {
2542 dSP;
2543 AV *av = (AV *)SvRV (data);
2544 int i;
2545
2546 EXTEND (SP, AvFILLp (av) + 1);
2547 for (i = 0; i <= AvFILLp (av); ++i)
2548 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2549
2550 /* we have stolen the elements, so set length to zero and free */
2551 AvFILLp (av) = -1;
2552 av_undef (av);
2553
2554 PUTBACK;
2555 }
2556
2557 return 0;
2558}
2559
2560static void
2561slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2562{
2563 SV *cb;
2564
2565 if (items)
2566 cb = arg [0];
2567 else
2568 {
2569 struct coro *coro = SvSTATE_current;
2570
2571 if (!coro->rouse_cb)
2572 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2573
2574 cb = sv_2mortal (coro->rouse_cb);
2575 coro->rouse_cb = 0;
2576 }
2577
2578 if (!SvROK (cb)
2579 || SvTYPE (SvRV (cb)) != SVt_PVCV
2580 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2581 croak ("Coro::rouse_wait called with illegal callback argument,");
2582
2583 {
2584 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2585 SV *data = (SV *)S_GENSUB_ARG;
2586
2587 frame->data = (void *)data;
2588 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2589 frame->check = slf_check_rouse_wait;
2590 }
2591}
2592
2593static SV *
2594coro_new_rouse_cb (pTHX)
2595{
2596 HV *hv = (HV *)SvRV (coro_current);
2597 struct coro *coro = SvSTATE_hv (hv);
2598 SV *data = newRV_inc ((SV *)hv);
2599 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2600
2601 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2602 SvREFCNT_dec (data); /* magicext increases the refcount */
2603
2604 SvREFCNT_dec (coro->rouse_cb);
2605 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2606
2607 return cb;
2608}
2609
2610/*****************************************************************************/
2611/* schedule-like-function opcode (SLF) */
2612
2613static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2614static const CV *slf_cv;
2615static SV **slf_argv;
2616static int slf_argc, slf_arga; /* count, allocated */
2617static I32 slf_ax; /* top of stack, for restore */
2618
2619/* this restores the stack in the case we patched the entersub, to */
2620/* recreate the stack frame as perl will on following calls */
2621/* since entersub cleared the stack */
2622static OP *
2623pp_restore (pTHX)
2624{
2625 int i;
2626 SV **SP = PL_stack_base + slf_ax;
2627
2628 PUSHMARK (SP);
2629
2630 EXTEND (SP, slf_argc + 1);
2631
2632 for (i = 0; i < slf_argc; ++i)
2633 PUSHs (sv_2mortal (slf_argv [i]));
2634
2635 PUSHs ((SV *)CvGV (slf_cv));
2636
2637 RETURNOP (slf_restore.op_first);
2638}
2639
2640static void
2641slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2642{
2643 SV **arg = (SV **)slf_frame.data;
2644
2645 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2646}
2647
2648static void
2649slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2650{
2651 if (items != 2)
2652 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2653
2654 frame->prepare = slf_prepare_transfer;
2655 frame->check = slf_check_nop;
2656 frame->data = (void *)arg; /* let's hope it will stay valid */
2657}
2658
2659static void
2660slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2661{
2662 frame->prepare = prepare_schedule;
2663 frame->check = slf_check_nop;
2664}
2665
2666static void
1009prepare_cede (struct transfer_args *ta) 2667slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
1010{ 2668{
1011 LOCK; 2669 struct coro *next = (struct coro *)slf_frame.data;
1012 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
1013 UNLOCK;
1014 2670
2671 SvREFCNT_inc_NN (next->hv);
1015 prepare_schedule (ta); 2672 prepare_schedule_to (aTHX_ ta, next);
1016} 2673}
1017 2674
1018static void 2675static void
1019api_schedule (void) 2676slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1020{ 2677{
1021 dTHX; 2678 if (!items)
2679 croak ("Coro::schedule_to expects a coroutine argument, caught");
2680
2681 frame->data = (void *)SvSTATE (arg [0]);
2682 frame->prepare = slf_prepare_schedule_to;
2683 frame->check = slf_check_nop;
2684}
2685
2686static void
2687slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2688{
2689 api_ready (aTHX_ SvRV (coro_current));
2690
2691 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2692}
2693
2694static void
2695slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2696{
2697 frame->prepare = prepare_cede;
2698 frame->check = slf_check_nop;
2699}
2700
2701static void
2702slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2703{
2704 frame->prepare = prepare_cede_notself;
2705 frame->check = slf_check_nop;
2706}
2707
2708/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2709static void
2710slf_destroy (pTHX_ struct coro *coro)
2711{
2712 struct CoroSLF frame = coro->slf_frame;
2713
2714 /*
2715 * The on_destroy below most likely is from an SLF call.
2716 * Since by definition the SLF call will not finish when we destroy
2717 * the coro, we will have to force-finish it here, otherwise
2718 * cleanup functions cannot call SLF functions.
2719 */
2720 coro->slf_frame.prepare = 0;
2721
2722 /* this callback is reserved for slf functions needing to do cleanup */
2723 if (frame.destroy && frame.prepare && !PL_dirty)
2724 frame.destroy (aTHX_ &frame);
2725}
2726
2727/*
2728 * these not obviously related functions are all rolled into one
2729 * function to increase chances that they all will call transfer with the same
2730 * stack offset
2731 * SLF stands for "schedule-like-function".
2732 */
2733static OP *
2734pp_slf (pTHX)
2735{
2736 I32 checkmark; /* mark SP to see how many elements check has pushed */
2737
2738 /* set up the slf frame, unless it has already been set-up */
2739 /* the latter happens when a new coro has been started */
2740 /* or when a new cctx was attached to an existing coroutine */
2741 if (ecb_expect_true (!slf_frame.prepare))
2742 {
2743 /* first iteration */
2744 dSP;
2745 SV **arg = PL_stack_base + TOPMARK + 1;
2746 int items = SP - arg; /* args without function object */
2747 SV *gv = *sp;
2748
2749 /* do a quick consistency check on the "function" object, and if it isn't */
2750 /* for us, divert to the real entersub */
2751 if (SvTYPE (gv) != SVt_PVGV
2752 || !GvCV (gv)
2753 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2754 return PL_ppaddr[OP_ENTERSUB](aTHX);
2755
2756 if (!(PL_op->op_flags & OPf_STACKED))
2757 {
2758 /* ampersand-form of call, use @_ instead of stack */
2759 AV *av = GvAV (PL_defgv);
2760 arg = AvARRAY (av);
2761 items = AvFILLp (av) + 1;
2762 }
2763
2764 /* now call the init function, which needs to set up slf_frame */
2765 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2766 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2767
2768 /* pop args */
2769 SP = PL_stack_base + POPMARK;
2770
2771 PUTBACK;
2772 }
2773
2774 /* now that we have a slf_frame, interpret it! */
2775 /* we use a callback system not to make the code needlessly */
2776 /* complicated, but so we can run multiple perl coros from one cctx */
2777
2778 do
2779 {
1022 struct transfer_args ta; 2780 struct coro_transfer_args ta;
1023 2781
1024 prepare_schedule (&ta); 2782 slf_frame.prepare (aTHX_ &ta);
1025 TRANSFER (ta); 2783 TRANSFER (ta, 0);
1026}
1027 2784
2785 checkmark = PL_stack_sp - PL_stack_base;
2786 }
2787 while (slf_frame.check (aTHX_ &slf_frame));
2788
2789 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2790
2791 /* exception handling */
2792 if (ecb_expect_false (CORO_THROW))
2793 {
2794 SV *exception = sv_2mortal (CORO_THROW);
2795
2796 CORO_THROW = 0;
2797 sv_setsv (ERRSV, exception);
2798 croak (0);
2799 }
2800
2801 /* return value handling - mostly like entersub */
2802 /* make sure we put something on the stack in scalar context */
2803 if (GIMME_V == G_SCALAR
2804 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2805 {
2806 dSP;
2807 SV **bot = PL_stack_base + checkmark;
2808
2809 if (sp == bot) /* too few, push undef */
2810 bot [1] = &PL_sv_undef;
2811 else /* too many, take last one */
2812 bot [1] = *sp;
2813
2814 SP = bot + 1;
2815
2816 PUTBACK;
2817 }
2818
2819 return NORMAL;
2820}
2821
2822static void
2823api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2824{
2825 int i;
2826 SV **arg = PL_stack_base + ax;
2827 int items = PL_stack_sp - arg + 1;
2828
2829 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2830
2831 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2832 && PL_op->op_ppaddr != pp_slf)
2833 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2834
2835 CvFLAGS (cv) |= CVf_SLF;
2836 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2837 slf_cv = cv;
2838
2839 /* we patch the op, and then re-run the whole call */
2840 /* we have to put the same argument on the stack for this to work */
2841 /* and this will be done by pp_restore */
2842 slf_restore.op_next = (OP *)&slf_restore;
2843 slf_restore.op_type = OP_CUSTOM;
2844 slf_restore.op_ppaddr = pp_restore;
2845 slf_restore.op_first = PL_op;
2846
2847 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2848
2849 if (PL_op->op_flags & OPf_STACKED)
2850 {
2851 if (items > slf_arga)
2852 {
2853 slf_arga = items;
2854 Safefree (slf_argv);
2855 New (0, slf_argv, slf_arga, SV *);
2856 }
2857
2858 slf_argc = items;
2859
2860 for (i = 0; i < items; ++i)
2861 slf_argv [i] = SvREFCNT_inc (arg [i]);
2862 }
2863 else
2864 slf_argc = 0;
2865
2866 PL_op->op_ppaddr = pp_slf;
2867 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2868
2869 PL_op = (OP *)&slf_restore;
2870}
2871
2872/*****************************************************************************/
2873/* dynamic wind */
2874
2875static void
2876on_enterleave_call (pTHX_ SV *cb)
2877{
2878 dSP;
2879
2880 PUSHSTACK;
2881
2882 PUSHMARK (SP);
2883 PUTBACK;
2884 call_sv (cb, G_VOID | G_DISCARD);
2885 SPAGAIN;
2886
2887 POPSTACK;
2888}
2889
2890static SV *
2891coro_avp_pop_and_free (pTHX_ AV **avp)
2892{
2893 AV *av = *avp;
2894 SV *res = av_pop (av);
2895
2896 if (AvFILLp (av) < 0)
2897 {
2898 *avp = 0;
2899 SvREFCNT_dec (av);
2900 }
2901
2902 return res;
2903}
2904
2905static void
2906coro_pop_on_enter (pTHX_ void *coro)
2907{
2908 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2909 SvREFCNT_dec (cb);
2910}
2911
2912static void
2913coro_pop_on_leave (pTHX_ void *coro)
2914{
2915 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2916 on_enterleave_call (aTHX_ sv_2mortal (cb));
2917}
2918
2919static void
2920enterleave_hook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, void *arg)
2921{
2922 if (!hook)
2923 return;
2924
2925 if (!*avp)
2926 {
2927 *avp = newAV ();
2928 AvREAL_off (*avp);
2929 }
2930
2931 av_push (*avp, (SV *)hook);
2932 av_push (*avp, (SV *)arg);
2933}
2934
2935static void
2936enterleave_unhook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, int execute)
2937{
2938 AV *av = *avp;
2939 int i;
2940
2941 if (!av)
2942 return;
2943
2944 for (i = AvFILLp (av) - 1; i >= 0; i -= 2)
2945 if (AvARRAY (av)[i] == (SV *)hook)
2946 {
2947 if (execute)
2948 hook (aTHX_ (void *)AvARRAY (av)[i + 1]);
2949
2950 memmove (AvARRAY (av) + i, AvARRAY (av) + i + 2, AvFILLp (av) - i - 1);
2951 av_pop (av);
2952 av_pop (av);
2953 break;
2954 }
2955
2956 if (AvFILLp (av) >= 0)
2957 {
2958 *avp = 0;
2959 SvREFCNT_dec_NN (av);
2960 }
2961}
2962
2963static void
2964api_enterleave_hook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2965{
2966 struct coro *coro = SvSTATE (coro_sv);
2967
2968 if (SvSTATE_current == coro)
2969 if (enter)
2970 enter (aTHX_ enter_arg);
2971
2972 enterleave_hook_xs (aTHX_ coro, &coro->on_enter_xs, enter, enter_arg);
2973 enterleave_hook_xs (aTHX_ coro, &coro->on_leave_xs, leave, leave_arg);
2974}
2975
2976static void
2977api_enterleave_unhook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, coro_enterleave_hook leave)
2978{
2979 struct coro *coro = SvSTATE (coro_sv);
2980
2981 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2982 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, SvSTATE_current == coro);
2983}
2984
2985static void
2986savedestructor_unhook_enter (pTHX_ coro_enterleave_hook enter)
2987{
2988 struct coro *coro = SvSTATE_current;
2989
2990 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2991}
2992
2993static void
2994savedestructor_unhook_leave (pTHX_ coro_enterleave_hook leave)
2995{
2996 struct coro *coro = SvSTATE_current;
2997
2998 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, 1);
2999}
3000
3001static void
3002api_enterleave_scope_hook (pTHX_ coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
3003{
3004 api_enterleave_hook (aTHX_ coro_current, enter, enter_arg, leave, leave_arg);
3005
3006 /* this ought to be much cheaper than malloc + a single destructor call */
3007 if (enter) SAVEDESTRUCTOR_X (savedestructor_unhook_enter, enter);
3008 if (leave) SAVEDESTRUCTOR_X (savedestructor_unhook_leave, leave);
3009}
3010
3011/*****************************************************************************/
3012/* PerlIO::cede */
3013
3014typedef struct
3015{
3016 PerlIOBuf base;
3017 NV next, every;
3018} PerlIOCede;
3019
3020static IV ecb_cold
3021PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3022{
3023 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
3024
3025 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
3026 self->next = nvtime () + self->every;
3027
3028 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
3029}
3030
3031static SV * ecb_cold
3032PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
3033{
3034 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
3035
3036 return newSVnv (self->every);
3037}
3038
3039static IV
3040PerlIOCede_flush (pTHX_ PerlIO *f)
3041{
3042 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
3043 double now = nvtime ();
3044
3045 if (now >= self->next)
3046 {
3047 api_cede (aTHX);
3048 self->next = now + self->every;
3049 }
3050
3051 return PerlIOBuf_flush (aTHX_ f);
3052}
3053
3054static PerlIO_funcs PerlIO_cede =
3055{
3056 sizeof(PerlIO_funcs),
3057 "cede",
3058 sizeof(PerlIOCede),
3059 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
3060 PerlIOCede_pushed,
3061 PerlIOBuf_popped,
3062 PerlIOBuf_open,
3063 PerlIOBase_binmode,
3064 PerlIOCede_getarg,
3065 PerlIOBase_fileno,
3066 PerlIOBuf_dup,
3067 PerlIOBuf_read,
3068 PerlIOBuf_unread,
3069 PerlIOBuf_write,
3070 PerlIOBuf_seek,
3071 PerlIOBuf_tell,
3072 PerlIOBuf_close,
3073 PerlIOCede_flush,
3074 PerlIOBuf_fill,
3075 PerlIOBase_eof,
3076 PerlIOBase_error,
3077 PerlIOBase_clearerr,
3078 PerlIOBase_setlinebuf,
3079 PerlIOBuf_get_base,
3080 PerlIOBuf_bufsiz,
3081 PerlIOBuf_get_ptr,
3082 PerlIOBuf_get_cnt,
3083 PerlIOBuf_set_ptrcnt,
3084};
3085
3086/*****************************************************************************/
3087/* Coro::Semaphore & Coro::Signal */
3088
3089static SV *
3090coro_waitarray_new (pTHX_ int count)
3091{
3092 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
3093 AV *av = newAV ();
3094 SV **ary;
3095
3096 /* unfortunately, building manually saves memory */
3097 Newx (ary, 2, SV *);
3098 AvALLOC (av) = ary;
3099#if PERL_VERSION_ATLEAST (5,10,0)
3100 AvARRAY (av) = ary;
3101#else
3102 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
3103 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
3104 SvPVX ((SV *)av) = (char *)ary;
3105#endif
3106 AvMAX (av) = 1;
3107 AvFILLp (av) = 0;
3108 ary [0] = newSViv (count);
3109
3110 return newRV_noinc ((SV *)av);
3111}
3112
3113/* semaphore */
3114
3115static void
3116coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
3117{
3118 SV *count_sv = AvARRAY (av)[0];
3119 IV count = SvIVX (count_sv);
3120
3121 count += adjust;
3122 SvIVX (count_sv) = count;
3123
3124 /* now wake up as many waiters as are expected to lock */
3125 while (count > 0 && AvFILLp (av) > 0)
3126 {
3127 SV *cb;
3128
3129 /* swap first two elements so we can shift a waiter */
3130 AvARRAY (av)[0] = AvARRAY (av)[1];
3131 AvARRAY (av)[1] = count_sv;
3132 cb = av_shift (av);
3133
3134 if (SvOBJECT (cb))
3135 {
3136 api_ready (aTHX_ cb);
3137 --count;
3138 }
3139 else if (SvTYPE (cb) == SVt_PVCV)
3140 {
3141 dSP;
3142 PUSHMARK (SP);
3143 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3144 PUTBACK;
3145 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3146 }
3147
3148 SvREFCNT_dec_NN (cb);
3149 }
3150}
3151
3152static void
3153coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
3154{
3155 /* call $sem->adjust (0) to possibly wake up some other waiters */
3156 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
3157}
3158
1028static void 3159static int
1029api_cede (void) 3160slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
1030{ 3161{
1031 dTHX; 3162 AV *av = (AV *)frame->data;
1032 struct transfer_args ta; 3163 SV *count_sv = AvARRAY (av)[0];
3164 SV *coro_hv = SvRV (coro_current);
1033 3165
1034 prepare_cede (&ta); 3166 frame->destroy = 0;
1035 TRANSFER (ta);
1036}
1037 3167
3168 /* if we are about to throw, don't actually acquire the lock, just throw */
3169 if (ecb_expect_false (CORO_THROW))
3170 {
3171 /* we still might be responsible for the semaphore, so wake up others */
3172 coro_semaphore_adjust (aTHX_ av, 0);
3173
3174 return 0;
3175 }
3176 else if (SvIVX (count_sv) > 0)
3177 {
3178 if (acquire)
3179 SvIVX (count_sv) = SvIVX (count_sv) - 1;
3180 else
3181 coro_semaphore_adjust (aTHX_ av, 0);
3182
3183 return 0;
3184 }
3185 else
3186 {
3187 int i;
3188 /* if we were woken up but can't down, we look through the whole */
3189 /* waiters list and only add us if we aren't in there already */
3190 /* this avoids some degenerate memory usage cases */
3191 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
3192 if (AvARRAY (av)[i] == coro_hv)
3193 return 1;
3194
3195 av_push (av, SvREFCNT_inc (coro_hv));
3196 return 1;
3197 }
3198}
3199
3200static int
3201slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
3202{
3203 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
3204}
3205
3206static int
3207slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
3208{
3209 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3210}
3211
3212static void
3213slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3214{
3215 AV *av = (AV *)SvRV (arg [0]);
3216
3217 if (SvIVX (AvARRAY (av)[0]) > 0)
3218 {
3219 frame->data = (void *)av;
3220 frame->prepare = prepare_nop;
3221 }
3222 else
3223 {
3224 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3225
3226 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3227 frame->prepare = prepare_schedule;
3228 /* to avoid race conditions when a woken-up coro gets terminated */
3229 /* we arrange for a temporary on_destroy that calls adjust (0) */
3230 frame->destroy = coro_semaphore_destroy;
3231 }
3232}
3233
3234static void
3235slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3236{
3237 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3238 frame->check = slf_check_semaphore_down;
3239}
3240
3241static void
3242slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3243{
3244 if (items >= 2)
3245 {
3246 /* callback form */
3247 AV *av = (AV *)SvRV (arg [0]);
3248 SV *cb_cv = s_get_cv_croak (arg [1]);
3249
3250 av_push (av, SvREFCNT_inc_NN (cb_cv));
3251
3252 if (SvIVX (AvARRAY (av)[0]) > 0)
3253 coro_semaphore_adjust (aTHX_ av, 0);
3254
3255 frame->prepare = prepare_nop;
3256 frame->check = slf_check_nop;
3257 }
3258 else
3259 {
3260 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3261 frame->check = slf_check_semaphore_wait;
3262 }
3263}
3264
3265/* signal */
3266
3267static void
3268coro_signal_wake (pTHX_ AV *av, int count)
3269{
3270 SvIVX (AvARRAY (av)[0]) = 0;
3271
3272 /* now signal count waiters */
3273 while (count > 0 && AvFILLp (av) > 0)
3274 {
3275 SV *cb;
3276
3277 /* swap first two elements so we can shift a waiter */
3278 cb = AvARRAY (av)[0];
3279 AvARRAY (av)[0] = AvARRAY (av)[1];
3280 AvARRAY (av)[1] = cb;
3281
3282 cb = av_shift (av);
3283
3284 if (SvTYPE (cb) == SVt_PVCV)
3285 {
3286 dSP;
3287 PUSHMARK (SP);
3288 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3289 PUTBACK;
3290 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3291 }
3292 else
3293 {
3294 api_ready (aTHX_ cb);
3295 sv_setiv (cb, 0); /* signal waiter */
3296 }
3297
3298 SvREFCNT_dec_NN (cb);
3299
3300 --count;
3301 }
3302}
3303
3304static int
3305slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3306{
3307 /* if we are about to throw, also stop waiting */
3308 return SvROK ((SV *)frame->data) && !CORO_THROW;
3309}
3310
3311static void
3312slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3313{
3314 AV *av = (AV *)SvRV (arg [0]);
3315
3316 if (items >= 2)
3317 {
3318 SV *cb_cv = s_get_cv_croak (arg [1]);
3319 av_push (av, SvREFCNT_inc_NN (cb_cv));
3320
3321 if (SvIVX (AvARRAY (av)[0]))
3322 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3323
3324 frame->prepare = prepare_nop;
3325 frame->check = slf_check_nop;
3326 }
3327 else if (SvIVX (AvARRAY (av)[0]))
3328 {
3329 SvIVX (AvARRAY (av)[0]) = 0;
3330 frame->prepare = prepare_nop;
3331 frame->check = slf_check_nop;
3332 }
3333 else
3334 {
3335 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3336
3337 av_push (av, waiter);
3338
3339 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3340 frame->prepare = prepare_schedule;
3341 frame->check = slf_check_signal_wait;
3342 }
3343}
3344
3345/*****************************************************************************/
3346/* Coro::AIO */
3347
3348#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3349
3350/* helper storage struct */
3351struct io_state
3352{
3353 int errorno;
3354 I32 laststype; /* U16 in 5.10.0 */
3355 int laststatval;
3356 Stat_t statcache;
3357};
3358
3359static void
3360coro_aio_callback (pTHX_ CV *cv)
3361{
3362 dXSARGS;
3363 AV *state = (AV *)S_GENSUB_ARG;
3364 SV *coro = av_pop (state);
3365 SV *data_sv = newSV (sizeof (struct io_state));
3366
3367 av_extend (state, items - 1);
3368
3369 sv_upgrade (data_sv, SVt_PV);
3370 SvCUR_set (data_sv, sizeof (struct io_state));
3371 SvPOK_only (data_sv);
3372
3373 {
3374 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3375
3376 data->errorno = errno;
3377 data->laststype = PL_laststype;
3378 data->laststatval = PL_laststatval;
3379 data->statcache = PL_statcache;
3380 }
3381
3382 /* now build the result vector out of all the parameters and the data_sv */
3383 {
3384 int i;
3385
3386 for (i = 0; i < items; ++i)
3387 av_push (state, SvREFCNT_inc_NN (ST (i)));
3388 }
3389
3390 av_push (state, data_sv);
3391
3392 api_ready (aTHX_ coro);
3393 SvREFCNT_dec_NN (coro);
3394 SvREFCNT_dec_NN ((AV *)state);
3395}
3396
3397static int
3398slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3399{
3400 AV *state = (AV *)frame->data;
3401
3402 /* if we are about to throw, return early */
3403 /* this does not cancel the aio request, but at least */
3404 /* it quickly returns */
3405 if (CORO_THROW)
3406 return 0;
3407
3408 /* one element that is an RV? repeat! */
3409 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
3410 return 1;
3411
3412 /* restore status */
3413 {
3414 SV *data_sv = av_pop (state);
3415 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3416
3417 errno = data->errorno;
3418 PL_laststype = data->laststype;
3419 PL_laststatval = data->laststatval;
3420 PL_statcache = data->statcache;
3421
3422 SvREFCNT_dec_NN (data_sv);
3423 }
3424
3425 /* push result values */
3426 {
3427 dSP;
3428 int i;
3429
3430 EXTEND (SP, AvFILLp (state) + 1);
3431 for (i = 0; i <= AvFILLp (state); ++i)
3432 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3433
3434 PUTBACK;
3435 }
3436
3437 return 0;
3438}
3439
3440static void
3441slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3442{
3443 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3444 SV *coro_hv = SvRV (coro_current);
3445 struct coro *coro = SvSTATE_hv (coro_hv);
3446
3447 /* put our coroutine id on the state arg */
3448 av_push (state, SvREFCNT_inc_NN (coro_hv));
3449
3450 /* first see whether we have a non-zero priority and set it as AIO prio */
3451 if (coro->prio)
3452 {
3453 dSP;
3454
3455 static SV *prio_cv;
3456 static SV *prio_sv;
3457
3458 if (ecb_expect_false (!prio_cv))
3459 {
3460 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3461 prio_sv = newSViv (0);
3462 }
3463
3464 PUSHMARK (SP);
3465 sv_setiv (prio_sv, coro->prio);
3466 XPUSHs (prio_sv);
3467
3468 PUTBACK;
3469 call_sv (prio_cv, G_VOID | G_DISCARD);
3470 }
3471
3472 /* now call the original request */
3473 {
3474 dSP;
3475 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3476 int i;
3477
3478 PUSHMARK (SP);
3479
3480 /* first push all args to the stack */
3481 EXTEND (SP, items + 1);
3482
3483 for (i = 0; i < items; ++i)
3484 PUSHs (arg [i]);
3485
3486 /* now push the callback closure */
3487 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3488
3489 /* now call the AIO function - we assume our request is uncancelable */
3490 PUTBACK;
3491 call_sv ((SV *)req, G_VOID | G_DISCARD);
3492 }
3493
3494 /* now that the request is going, we loop till we have a result */
3495 frame->data = (void *)state;
3496 frame->prepare = prepare_schedule;
3497 frame->check = slf_check_aio_req;
3498}
3499
3500static void
3501coro_aio_req_xs (pTHX_ CV *cv)
3502{
3503 dXSARGS;
3504
3505 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3506
3507 XSRETURN_EMPTY;
3508}
3509
3510/*****************************************************************************/
3511
3512#if CORO_CLONE
3513# include "clone.c"
3514#endif
3515
3516/*****************************************************************************/
3517
3518static SV *
3519coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3520{
3521 SV *coro_sv;
3522 struct coro *coro;
3523 MAGIC *mg;
3524 HV *hv;
3525 SV *cb;
3526 int i;
3527
3528 if (argc > 0)
3529 {
3530 cb = s_get_cv_croak (argv [0]);
3531
3532 if (!is_coro)
3533 {
3534 if (CvISXSUB (cb))
3535 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3536
3537 if (!CvROOT (cb))
3538 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3539 }
3540 }
3541
3542 Newz (0, coro, 1, struct coro);
3543 coro->args = newAV ();
3544 coro->flags = CF_NEW;
3545
3546 if (coro_first) coro_first->prev = coro;
3547 coro->next = coro_first;
3548 coro_first = coro;
3549
3550 coro->hv = hv = newHV ();
3551 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3552 mg->mg_flags |= MGf_DUP;
3553 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3554
3555 if (argc > 0)
3556 {
3557 av_extend (coro->args, argc + is_coro - 1);
3558
3559 if (is_coro)
3560 {
3561 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3562 cb = (SV *)cv_coro_run;
3563 }
3564
3565 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3566
3567 for (i = 1; i < argc; i++)
3568 av_push (coro->args, newSVsv (argv [i]));
3569 }
3570
3571 return coro_sv;
3572}
3573
3574#ifndef __cplusplus
3575ecb_cold XS(boot_Coro__State);
3576#endif
3577
3578#if CORO_JIT
3579
3580static void ecb_noinline ecb_cold
3581pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3582{
3583 dSP;
3584 AV *av = newAV ();
3585
3586 av_store (av, 3, newSVuv (d));
3587 av_store (av, 2, newSVuv (c));
3588 av_store (av, 1, newSVuv (b));
3589 av_store (av, 0, newSVuv (a));
3590
3591 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3592
3593 PUTBACK;
3594}
3595
3596static void ecb_noinline ecb_cold
3597jit_init (pTHX)
3598{
3599 dSP;
3600 SV *load, *save;
3601 char *map_base;
3602 char *load_ptr, *save_ptr;
3603 STRLEN load_len, save_len, map_len;
3604 int count;
3605
3606 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3607
3608 PUSHMARK (SP);
3609 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3610 #include "state.h"
3611 count = call_pv ("Coro::State::_jit", G_ARRAY);
3612 SPAGAIN;
3613
3614 save = POPs; save_ptr = SvPVbyte (save, save_len);
3615 load = POPs; load_ptr = SvPVbyte (load, load_len);
3616
3617 map_len = load_len + save_len + 16;
3618
3619 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3620
3621 if (map_base == (char *)MAP_FAILED)
3622 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3623
3624 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3625
3626 load_perl_slots = (load_save_perl_slots_type)map_base;
3627 memcpy (map_base, load_ptr, load_len);
3628
3629 map_base += (load_len + 15) & ~15;
3630
3631 save_perl_slots = (load_save_perl_slots_type)map_base;
3632 memcpy (map_base, save_ptr, save_len);
3633
3634 /* we are good citizens and try to make the page read-only, so the evil evil */
3635 /* hackers might have it a bit more difficult */
3636 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3637
3638 PUTBACK;
3639 eval_pv ("undef &Coro::State::_jit", 1);
3640}
3641
3642#endif
3643
1038MODULE = Coro::State PACKAGE = Coro::State 3644MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1039 3645
1040PROTOTYPES: DISABLE 3646PROTOTYPES: DISABLE
1041 3647
1042BOOT: 3648BOOT:
1043{ 3649{
3650#define VARx(name,expr,type) if (sizeof (type) < sizeof (expr)) croak ("FATAL: Coro thread context slot '" # name "' too small for this version of perl.");
3651#include "state.h"
1044#ifdef USE_ITHREADS 3652#ifdef USE_ITHREADS
1045 MUTEX_INIT (&coro_mutex); 3653# if CORO_PTHREAD
3654 coro_thx = PERL_GET_CONTEXT;
1046#endif 3655# endif
1047 BOOT_PAGESIZE; 3656#endif
3657 /* perl defines these to check for existance first, but why it doesn't */
3658 /* just create them one at init time is not clear to me, except for */
3659 /* programs trying to delete them, but... */
3660 /* anyway, we declare this as invalid and make sure they are initialised here */
3661 DEFSV;
3662 ERRSV;
3663
3664 cctx_current = cctx_new_empty ();
3665
3666 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3667 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3668
3669 {
3670 /*
3671 * we provide a vtbvl for %SIG magic that replaces PL_vtbl_sig
3672 * by coro_sig_vtbl in hash values.
3673 */
3674 MAGIC *mg = mg_find ((SV *)GvHV (gv_fetchpv ("SIG", GV_ADD | GV_NOTQUAL, SVt_PVHV)), PERL_MAGIC_sig);
3675
3676 /* this only works if perl doesn't have a vtbl for %SIG */
3677 assert (!mg->mg_virtual);
3678
3679 /*
3680 * The irony is that the perl API itself asserts that mg_virtual
3681 * must be non-const, yet perl5porters insisted on marking their
3682 * vtbls as read-only, just to thwart perl modules from patching
3683 * them.
3684 */
3685 mg->mg_virtual = (MGVTBL *)&coro_sig_vtbl;
3686 mg->mg_flags |= MGf_COPY;
3687
3688 coro_sigelem_vtbl = PL_vtbl_sigelem;
3689 coro_sigelem_vtbl.svt_get = coro_sigelem_get;
3690 coro_sigelem_vtbl.svt_set = coro_sigelem_set;
3691 coro_sigelem_vtbl.svt_clear = coro_sigelem_clr;
3692 }
3693
3694 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3695 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1048 3696
1049 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3697 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1050 3698
3699 newCONSTSUB (coro_state_stash, "BACKEND", newSVpv (CORO_BACKEND, 0)); /* undocumented */
3700
1051 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3701 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1052 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3702 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1053 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3703 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
3704 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1054 3705
1055 main_mainstack = PL_mainstack; 3706 main_mainstack = PL_mainstack;
3707 main_top_env = PL_top_env;
1056 3708
3709 while (main_top_env->je_prev)
3710 main_top_env = main_top_env->je_prev;
3711
3712 {
3713 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3714
3715 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3716 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3717
3718 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3719 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3720 }
3721
1057 coroapi.ver = CORO_API_VERSION; 3722 coroapi.ver = CORO_API_VERSION;
3723 coroapi.rev = CORO_API_REVISION;
3724
1058 coroapi.transfer = api_transfer; 3725 coroapi.transfer = api_transfer;
1059 3726
3727 coroapi.sv_state = SvSTATE_;
3728 coroapi.execute_slf = api_execute_slf;
3729 coroapi.prepare_nop = prepare_nop;
3730 coroapi.prepare_schedule = prepare_schedule;
3731 coroapi.prepare_cede = prepare_cede;
3732 coroapi.prepare_cede_notself = prepare_cede_notself;
3733
3734 time_init (aTHX);
3735
1060 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3736 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3737#if CORO_JIT
3738 PUTBACK;
3739 jit_init (aTHX);
3740 SPAGAIN;
3741#endif
1061} 3742}
1062 3743
1063SV * 3744SV *
1064new (char *klass, ...) 3745new (SV *klass, ...)
3746 ALIAS:
3747 Coro::new = 1
1065 CODE: 3748 CODE:
1066{ 3749 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1067 struct coro *coro; 3750 OUTPUT:
1068 HV *hv; 3751 RETVAL
1069 int i;
1070 3752
1071 Newz (0, coro, 1, struct coro); 3753void
1072 coro->args = newAV (); 3754transfer (...)
3755 PROTOTYPE: $$
3756 CODE:
3757 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1073 3758
3759SV *
3760clone (Coro::State coro)
3761 CODE:
3762{
3763#if CORO_CLONE
3764 struct coro *ncoro = coro_clone (aTHX_ coro);
3765 MAGIC *mg;
3766 /* TODO: too much duplication */
1074 hv = newHV (); 3767 ncoro->hv = newHV ();
1075 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 3768 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3769 mg->mg_flags |= MGf_DUP;
1076 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 3770 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3771#else
3772 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3773#endif
3774}
3775 OUTPUT:
3776 RETVAL
1077 3777
1078 for (i = 1; i < items; i++) 3778int
1079 av_push (coro->args, newSVsv (ST (i))); 3779cctx_stacksize (int new_stacksize = 0)
3780 PROTOTYPE: ;$
3781 CODE:
3782 RETVAL = cctx_stacksize;
3783 if (new_stacksize)
3784 {
3785 cctx_stacksize = new_stacksize;
3786 ++cctx_gen;
3787 }
3788 OUTPUT:
3789 RETVAL
1080 3790
1081 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 3791int
1082 /*coro->stack = 0;*/ 3792cctx_max_idle (int max_idle = 0)
3793 PROTOTYPE: ;$
3794 CODE:
3795 RETVAL = cctx_max_idle;
3796 if (max_idle > 1)
3797 cctx_max_idle = max_idle;
3798 OUTPUT:
3799 RETVAL
3800
3801int
3802cctx_count ()
3803 PROTOTYPE:
3804 CODE:
3805 RETVAL = cctx_count;
3806 OUTPUT:
3807 RETVAL
3808
3809int
3810cctx_idle ()
3811 PROTOTYPE:
3812 CODE:
3813 RETVAL = cctx_idle;
3814 OUTPUT:
3815 RETVAL
3816
3817void
3818list ()
3819 PROTOTYPE:
3820 PPCODE:
3821{
3822 struct coro *coro;
3823 for (coro = coro_first; coro; coro = coro->next)
3824 if (coro->hv)
3825 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3826}
3827
3828void
3829call (Coro::State coro, SV *coderef)
3830 ALIAS:
3831 eval = 1
3832 CODE:
3833{
3834 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3835 {
3836 struct coro *current = SvSTATE_current;
3837 struct CoroSLF slf_save;
3838
3839 if (current != coro)
3840 {
3841 PUTBACK;
3842 save_perl (aTHX_ current);
3843 load_perl (aTHX_ coro);
3844 /* the coro is most likely in an active SLF call.
3845 * while not strictly required (the code we execute is
3846 * not allowed to call any SLF functions), it's cleaner
3847 * to reinitialise the slf_frame and restore it later.
3848 * This might one day allow us to actually do SLF calls
3849 * from code executed here.
3850 */
3851 slf_save = slf_frame;
3852 slf_frame.prepare = 0;
3853 SPAGAIN;
3854 }
3855
3856 PUSHSTACK;
3857
3858 PUSHMARK (SP);
3859 PUTBACK;
3860
3861 if (ix)
3862 eval_sv (coderef, 0);
3863 else
3864 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3865
3866 POPSTACK;
3867 SPAGAIN;
3868
3869 if (current != coro)
3870 {
3871 PUTBACK;
3872 slf_frame = slf_save;
3873 save_perl (aTHX_ coro);
3874 load_perl (aTHX_ current);
3875 SPAGAIN;
3876 }
3877 }
3878}
3879
3880SV *
3881is_ready (Coro::State coro)
3882 PROTOTYPE: $
3883 ALIAS:
3884 is_ready = CF_READY
3885 is_running = CF_RUNNING
3886 is_new = CF_NEW
3887 is_destroyed = CF_ZOMBIE
3888 is_zombie = CF_ZOMBIE
3889 is_suspended = CF_SUSPENDED
3890 CODE:
3891 RETVAL = boolSV (coro->flags & ix);
3892 OUTPUT:
3893 RETVAL
3894
3895void
3896throw (SV *self, SV *exception = &PL_sv_undef)
3897 PROTOTYPE: $;$
3898 CODE:
3899{
3900 struct coro *coro = SvSTATE (self);
3901 struct coro *current = SvSTATE_current;
3902 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3903 SvREFCNT_dec (*exceptionp);
3904 SvGETMAGIC (exception);
3905 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3906
3907 api_ready (aTHX_ self);
3908}
3909
3910void
3911api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3912 PROTOTYPE: $;$
3913 C_ARGS: aTHX_ coro, flags
3914
3915SV *
3916has_cctx (Coro::State coro)
3917 PROTOTYPE: $
3918 CODE:
3919 /* maybe manage the running flag differently */
3920 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3921 OUTPUT:
3922 RETVAL
3923
3924int
3925is_traced (Coro::State coro)
3926 PROTOTYPE: $
3927 CODE:
3928 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3929 OUTPUT:
3930 RETVAL
3931
3932UV
3933rss (Coro::State coro)
3934 PROTOTYPE: $
3935 ALIAS:
3936 usecount = 1
3937 CODE:
3938 switch (ix)
3939 {
3940 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3941 case 1: RETVAL = coro->usecount; break;
3942 }
3943 OUTPUT:
3944 RETVAL
3945
3946void
3947force_cctx ()
3948 PROTOTYPE:
3949 CODE:
3950 cctx_current->idle_sp = 0;
3951
3952void
3953swap_defsv (Coro::State self)
3954 PROTOTYPE: $
3955 ALIAS:
3956 swap_defav = 1
3957 CODE:
3958 if (!self->slot)
3959 croak ("cannot swap state with coroutine that has no saved state,");
3960 else
3961 {
3962 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3963 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3964
3965 SV *tmp = *src; *src = *dst; *dst = tmp;
3966 }
3967
3968void
3969cancel (Coro::State self)
3970 CODE:
3971 coro_state_destroy (aTHX_ self);
3972
3973SV *
3974enable_times (int enabled = enable_times)
3975 CODE:
3976{
3977 RETVAL = boolSV (enable_times);
3978
3979 if (enabled != enable_times)
3980 {
3981 enable_times = enabled;
3982
3983 coro_times_update ();
3984 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3985 }
1083} 3986}
1084 OUTPUT: 3987 OUTPUT:
1085 RETVAL 3988 RETVAL
1086 3989
1087void 3990void
1088_set_stacklevel (...) 3991times (Coro::State self)
1089 ALIAS: 3992 PPCODE:
1090 Coro::State::transfer = 1 3993{
1091 Coro::schedule = 2 3994 struct coro *current = SvSTATE (coro_current);
1092 Coro::cede = 3 3995
1093 Coro::Cont::yield = 4 3996 if (ecb_expect_false (current == self))
3997 {
3998 coro_times_update ();
3999 coro_times_add (SvSTATE (coro_current));
4000 }
4001
4002 EXTEND (SP, 2);
4003 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
4004 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
4005
4006 if (ecb_expect_false (current == self))
4007 coro_times_sub (SvSTATE (coro_current));
4008}
4009
4010void
4011swap_sv (Coro::State coro, SV *sva, SV *svb)
4012 CODE:
4013{
4014 struct coro *current = SvSTATE_current;
4015 AV *swap_sv;
4016 int i;
4017
4018 sva = SvRV (sva);
4019 svb = SvRV (svb);
4020
4021 if (current == coro)
4022 SWAP_SVS_LEAVE (current);
4023
4024 if (!coro->swap_sv)
4025 coro->swap_sv = newAV ();
4026
4027 swap_sv = coro->swap_sv;
4028
4029 for (i = AvFILLp (swap_sv) - 1; i >= 0; i -= 2)
4030 {
4031 SV *a = AvARRAY (swap_sv)[i ];
4032 SV *b = AvARRAY (swap_sv)[i + 1];
4033
4034 if (a == sva && b == svb)
4035 {
4036 SvREFCNT_dec_NN (a);
4037 SvREFCNT_dec_NN (b);
4038
4039 for (; i <= AvFILLp (swap_sv) - 2; i++)
4040 AvARRAY (swap_sv)[i] = AvARRAY (swap_sv)[i + 2];
4041
4042 AvFILLp (swap_sv) -= 2;
4043
4044 goto removed;
4045 }
4046 }
4047
4048 av_push (swap_sv, SvREFCNT_inc_NN (sva));
4049 av_push (swap_sv, SvREFCNT_inc_NN (svb));
4050
4051 removed:
4052
4053 if (current == coro)
4054 SWAP_SVS_ENTER (current);
4055}
4056
4057
4058MODULE = Coro::State PACKAGE = Coro
4059
4060BOOT:
4061{
4062 if (SVt_LAST > 32)
4063 croak ("Coro internal error: SVt_LAST > 32, swap_sv might need adjustment");
4064
4065 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
4066 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
4067 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
4068 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
4069 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
4070 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
4071 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
4072 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
4073
4074 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
4075 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
4076 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
4077 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
4078
4079 coro_stash = gv_stashpv ("Coro", TRUE);
4080
4081 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
4082 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
4083 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
4084 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
4085 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
4086 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
4087
4088 {
4089 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
4090
4091 coroapi.schedule = api_schedule;
4092 coroapi.schedule_to = api_schedule_to;
4093 coroapi.cede = api_cede;
4094 coroapi.cede_notself = api_cede_notself;
4095 coroapi.ready = api_ready;
4096 coroapi.is_ready = api_is_ready;
4097 coroapi.nready = coro_nready;
4098 coroapi.current = coro_current;
4099
4100 coroapi.enterleave_hook = api_enterleave_hook;
4101 coroapi.enterleave_unhook = api_enterleave_unhook;
4102 coroapi.enterleave_scope_hook = api_enterleave_scope_hook;
4103
4104 /*GCoroAPI = &coroapi;*/
4105 sv_setiv (sv, PTR2IV (&coroapi));
4106 SvREADONLY_on (sv);
4107 }
4108}
4109
4110SV *
4111async (...)
4112 PROTOTYPE: &@
1094 CODE: 4113 CODE:
1095{ 4114 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
1096 struct transfer_args ta; 4115 api_ready (aTHX_ RETVAL);
1097 4116 OUTPUT:
1098 switch (ix) 4117 RETVAL
1099 {
1100 case 0:
1101 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));
1102 ta.next = 0;
1103 ta.flags = TRANSFER_SET_STACKLEVEL;
1104 break;
1105
1106 case 1:
1107 if (items != 3)
1108 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1109
1110 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1111 break;
1112
1113 case 2:
1114 prepare_schedule (&ta);
1115 break;
1116
1117 case 3:
1118 prepare_cede (&ta);
1119 break;
1120
1121 case 4:
1122 {
1123 SV *yieldstack;
1124 SV *sv;
1125 AV *defav = GvAV (PL_defgv);
1126
1127 yieldstack = *hv_fetch (
1128 (HV *)SvRV (GvSV (coro_current)),
1129 "yieldstack", sizeof ("yieldstack") - 1,
1130 0
1131 );
1132
1133 /* set up @_ -- ugly */
1134 av_clear (defav);
1135 av_fill (defav, items - 1);
1136 while (items--)
1137 av_store (defav, items, SvREFCNT_inc (ST(items)));
1138
1139 sv = av_pop ((AV *)SvRV (yieldstack));
1140 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1141 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1142 ta.flags = 0;
1143 SvREFCNT_dec (sv);
1144 }
1145 break;
1146
1147 }
1148
1149 TRANSFER (ta);
1150}
1151 4118
1152void 4119void
1153_clone_state_from (SV *dst, SV *src) 4120_destroy (Coro::State coro)
1154 CODE: 4121 CODE:
1155{ 4122 /* used by the manager thread */
1156 struct coro *coro_src = SvSTATE (src); 4123 coro_state_destroy (aTHX_ coro);
1157
1158 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1159
1160 ++coro_src->refcnt;
1161 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1162}
1163 4124
1164void 4125void
1165_exit (code) 4126on_destroy (Coro::State coro, SV *cb)
1166 int code 4127 CODE:
4128 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
4129
4130void
4131join (...)
4132 CODE:
4133 CORO_EXECUTE_SLF_XS (slf_init_join);
4134
4135void
4136terminate (...)
4137 CODE:
4138 CORO_EXECUTE_SLF_XS (slf_init_terminate);
4139
4140void
4141cancel (...)
4142 CODE:
4143 CORO_EXECUTE_SLF_XS (slf_init_cancel);
4144
4145int
4146safe_cancel (Coro::State self, ...)
4147 C_ARGS: aTHX_ self, &ST (1), items - 1
4148
4149void
4150schedule (...)
4151 CODE:
4152 CORO_EXECUTE_SLF_XS (slf_init_schedule);
4153
4154void
4155schedule_to (...)
4156 CODE:
4157 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
4158
4159void
4160cede_to (...)
4161 CODE:
4162 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
4163
4164void
4165cede (...)
4166 CODE:
4167 CORO_EXECUTE_SLF_XS (slf_init_cede);
4168
4169void
4170cede_notself (...)
4171 CODE:
4172 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
4173
4174void
4175_set_current (SV *current)
1167 PROTOTYPE: $ 4176 PROTOTYPE: $
1168 CODE: 4177 CODE:
1169 _exit (code); 4178 SvREFCNT_dec_NN (SvRV (coro_current));
4179 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1170 4180
1171MODULE = Coro::State PACKAGE = Coro 4181void
1172 4182_set_readyhook (SV *hook)
1173BOOT: 4183 PROTOTYPE: $
1174{ 4184 CODE:
1175 int i; 4185 SvREFCNT_dec (coro_readyhook);
1176 4186 SvGETMAGIC (hook);
1177 coro_stash = gv_stashpv ("Coro", TRUE); 4187 if (SvOK (hook))
1178 4188 {
1179 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1180 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1181 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1182 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1183 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1184 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1185
1186 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1187 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1188
1189 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1190 coro_ready[i] = newAV (); 4189 coro_readyhook = newSVsv (hook);
1191 4190 CORO_READYHOOK = invoke_sv_ready_hook_helper;
1192 {
1193 SV *sv = perl_get_sv("Coro::API", 1);
1194
1195 coroapi.schedule = api_schedule;
1196 coroapi.cede = api_cede;
1197 coroapi.ready = api_ready;
1198 coroapi.nready = &coro_nready;
1199 coroapi.current = coro_current;
1200
1201 GCoroAPI = &coroapi;
1202 sv_setiv (sv, (IV)&coroapi);
1203 SvREADONLY_on (sv);
1204 } 4191 }
1205} 4192 else
4193 {
4194 coro_readyhook = 0;
4195 CORO_READYHOOK = 0;
4196 }
1206 4197
1207int 4198int
1208prio (Coro::State coro, int newprio = 0) 4199prio (Coro::State coro, int newprio = 0)
4200 PROTOTYPE: $;$
1209 ALIAS: 4201 ALIAS:
1210 nice = 1 4202 nice = 1
1211 CODE: 4203 CODE:
1212{ 4204{
1213 RETVAL = coro->prio; 4205 RETVAL = coro->prio;
1214 4206
1215 if (items > 1) 4207 if (items > 1)
1216 { 4208 {
1217 if (ix) 4209 if (ix)
1218 newprio += coro->prio; 4210 newprio = coro->prio - newprio;
1219 4211
1220 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 4212 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1221 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 4213 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1222 4214
1223 coro->prio = newprio; 4215 coro->prio = newprio;
1224 } 4216 }
1225} 4217}
4218 OUTPUT:
4219 RETVAL
1226 4220
1227void 4221SV *
1228ready (SV *self) 4222ready (SV *self)
1229 PROTOTYPE: $ 4223 PROTOTYPE: $
1230 CODE: 4224 CODE:
1231 api_ready (self); 4225 RETVAL = boolSV (api_ready (aTHX_ self));
4226 OUTPUT:
4227 RETVAL
1232 4228
1233int 4229int
1234nready (...) 4230nready (...)
1235 PROTOTYPE: 4231 PROTOTYPE:
1236 CODE: 4232 CODE:
1237 RETVAL = coro_nready; 4233 RETVAL = coro_nready;
1238 OUTPUT: 4234 OUTPUT:
1239 RETVAL 4235 RETVAL
1240 4236
1241MODULE = Coro::State PACKAGE = Coro::AIO 4237void
4238suspend (Coro::State self)
4239 PROTOTYPE: $
4240 CODE:
4241 self->flags |= CF_SUSPENDED;
4242
4243void
4244resume (Coro::State self)
4245 PROTOTYPE: $
4246 CODE:
4247 self->flags &= ~CF_SUSPENDED;
4248
4249void
4250_pool_handler (...)
4251 CODE:
4252 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
4253
4254void
4255async_pool (SV *cv, ...)
4256 PROTOTYPE: &@
4257 PPCODE:
4258{
4259 HV *hv = (HV *)av_pop (av_async_pool);
4260 AV *av = newAV ();
4261 SV *cb = ST (0);
4262 int i;
4263
4264 av_extend (av, items - 2);
4265 for (i = 1; i < items; ++i)
4266 av_push (av, SvREFCNT_inc_NN (ST (i)));
4267
4268 if ((SV *)hv == &PL_sv_undef)
4269 {
4270 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
4271 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
4272 SvREFCNT_dec_NN (sv);
4273 }
4274
4275 {
4276 struct coro *coro = SvSTATE_hv (hv);
4277
4278 assert (!coro->invoke_cb);
4279 assert (!coro->invoke_av);
4280 coro->invoke_cb = SvREFCNT_inc (cb);
4281 coro->invoke_av = av;
4282 }
4283
4284 api_ready (aTHX_ (SV *)hv);
4285
4286 if (GIMME_V != G_VOID)
4287 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4288 else
4289 SvREFCNT_dec_NN (hv);
4290}
1242 4291
1243SV * 4292SV *
1244_get_state () 4293rouse_cb ()
4294 PROTOTYPE:
1245 CODE: 4295 CODE:
1246{ 4296 RETVAL = coro_new_rouse_cb (aTHX);
1247 struct {
1248 int errorno;
1249 int laststype;
1250 int laststatval;
1251 Stat_t statcache;
1252 } data;
1253
1254 data.errorno = errno;
1255 data.laststype = PL_laststype;
1256 data.laststatval = PL_laststatval;
1257 data.statcache = PL_statcache;
1258
1259 RETVAL = newSVpvn ((char *)&data, sizeof data);
1260}
1261 OUTPUT: 4297 OUTPUT:
1262 RETVAL 4298 RETVAL
1263 4299
1264void 4300void
1265_set_state (char *data_) 4301rouse_wait (...)
4302 PROTOTYPE: ;$
4303 PPCODE:
4304 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4305
4306void
4307on_enter (SV *block)
4308 ALIAS:
4309 on_leave = 1
1266 PROTOTYPE: $ 4310 PROTOTYPE: &
1267 CODE: 4311 CODE:
1268{ 4312{
1269 struct { 4313 struct coro *coro = SvSTATE_current;
4314 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
4315
4316 block = s_get_cv_croak (block);
4317
4318 if (!*avp)
4319 *avp = newAV ();
4320
4321 av_push (*avp, SvREFCNT_inc (block));
4322
4323 if (!ix)
4324 on_enterleave_call (aTHX_ block);
4325
4326 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4327 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4328 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4329}
4330
4331
4332MODULE = Coro::State PACKAGE = PerlIO::cede
4333
4334BOOT:
4335 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4336
4337
4338MODULE = Coro::State PACKAGE = Coro::Semaphore
4339
4340SV *
4341new (SV *klass, SV *count = 0)
4342 CODE:
4343{
4344 int semcnt = 1;
4345
4346 if (count)
4347 {
4348 SvGETMAGIC (count);
4349
4350 if (SvOK (count))
4351 semcnt = SvIV (count);
4352 }
4353
4354 RETVAL = sv_bless (
4355 coro_waitarray_new (aTHX_ semcnt),
4356 GvSTASH (CvGV (cv))
4357 );
4358}
4359 OUTPUT:
4360 RETVAL
4361
4362# helper for Coro::Channel and others
4363SV *
4364_alloc (int count)
4365 CODE:
4366 RETVAL = coro_waitarray_new (aTHX_ count);
4367 OUTPUT:
4368 RETVAL
4369
4370SV *
4371count (SV *self)
4372 CODE:
4373 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4374 OUTPUT:
4375 RETVAL
4376
4377void
4378up (SV *self)
4379 CODE:
4380 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), 1);
4381
4382void
4383adjust (SV *self, int adjust)
4384 CODE:
4385 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), adjust);
4386
4387void
4388down (...)
4389 CODE:
4390 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4391
4392void
4393wait (...)
4394 CODE:
4395 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4396
4397void
4398try (SV *self)
4399 PPCODE:
4400{
4401 AV *av = (AV *)SvRV (self);
4402 SV *count_sv = AvARRAY (av)[0];
4403 IV count = SvIVX (count_sv);
4404
4405 if (count > 0)
4406 {
4407 --count;
4408 SvIVX (count_sv) = count;
4409 XSRETURN_YES;
4410 }
4411 else
4412 XSRETURN_NO;
4413}
4414
4415void
4416waiters (SV *self)
4417 PPCODE:
4418{
4419 AV *av = (AV *)SvRV (self);
4420 int wcount = AvFILLp (av) + 1 - 1;
4421
4422 if (GIMME_V == G_SCALAR)
4423 XPUSHs (sv_2mortal (newSViv (wcount)));
4424 else
4425 {
1270 int errorno; 4426 int i;
1271 int laststype; 4427 EXTEND (SP, wcount);
1272 int laststatval; 4428 for (i = 1; i <= wcount; ++i)
1273 Stat_t statcache; 4429 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1274 } *data = (void *)data_; 4430 }
1275
1276 errno = data->errorno;
1277 PL_laststype = data->laststype;
1278 PL_laststatval = data->laststatval;
1279 PL_statcache = data->statcache;
1280} 4431}
4432
4433MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4434
4435void
4436_may_delete (SV *sem, int count, unsigned int extra_refs)
4437 PPCODE:
4438{
4439 AV *av = (AV *)SvRV (sem);
4440
4441 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4442 && AvFILLp (av) == 0 /* no waiters, just count */
4443 && SvIV (AvARRAY (av)[0]) == count)
4444 XSRETURN_YES;
4445
4446 XSRETURN_NO;
4447}
4448
4449MODULE = Coro::State PACKAGE = Coro::Signal
4450
4451SV *
4452new (SV *klass)
4453 CODE:
4454 RETVAL = sv_bless (
4455 coro_waitarray_new (aTHX_ 0),
4456 GvSTASH (CvGV (cv))
4457 );
4458 OUTPUT:
4459 RETVAL
4460
4461void
4462wait (...)
4463 CODE:
4464 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4465
4466void
4467broadcast (SV *self)
4468 CODE:
4469{
4470 AV *av = (AV *)SvRV (self);
4471 coro_signal_wake (aTHX_ av, AvFILLp (av));
4472}
4473
4474void
4475send (SV *self)
4476 CODE:
4477{
4478 AV *av = (AV *)SvRV (self);
4479
4480 if (AvFILLp (av))
4481 coro_signal_wake (aTHX_ av, 1);
4482 else
4483 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4484}
4485
4486IV
4487awaited (SV *self)
4488 CODE:
4489 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4490 OUTPUT:
4491 RETVAL
4492
4493
4494MODULE = Coro::State PACKAGE = Coro::AnyEvent
4495
4496BOOT:
4497 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4498
4499void
4500_schedule (...)
4501 CODE:
4502{
4503 static int incede;
4504
4505 api_cede_notself (aTHX);
4506
4507 ++incede;
4508 while (coro_nready >= incede && api_cede (aTHX))
4509 ;
4510
4511 sv_setsv (sv_activity, &PL_sv_undef);
4512 if (coro_nready >= incede)
4513 {
4514 PUSHMARK (SP);
4515 PUTBACK;
4516 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4517 }
4518
4519 --incede;
4520}
4521
4522
4523MODULE = Coro::State PACKAGE = Coro::AIO
4524
4525void
4526_register (char *target, char *proto, SV *req)
4527 CODE:
4528{
4529 SV *req_cv = s_get_cv_croak (req);
4530 /* newXSproto doesn't return the CV on 5.8 */
4531 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4532 sv_setpv ((SV *)slf_cv, proto);
4533 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4534}
4535
4536MODULE = Coro::State PACKAGE = Coro::Select
4537
4538void
4539patch_pp_sselect ()
4540 CODE:
4541 if (!coro_old_pp_sselect)
4542 {
4543 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4544 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4545 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4546 }
4547
4548void
4549unpatch_pp_sselect ()
4550 CODE:
4551 if (coro_old_pp_sselect)
4552 {
4553 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4554 coro_old_pp_sselect = 0;
4555 }
4556
4557MODULE = Coro::State PACKAGE = Coro::Util
4558
4559void
4560_exit (int code)
4561 CODE:
4562 _exit (code);
4563
4564NV
4565time ()
4566 CODE:
4567 RETVAL = nvtime (aTHX);
4568 OUTPUT:
4569 RETVAL
4570
4571NV
4572gettimeofday ()
4573 PPCODE:
4574{
4575 UV tv [2];
4576 u2time (aTHX_ tv);
4577 EXTEND (SP, 2);
4578 PUSHs (sv_2mortal (newSVuv (tv [0])));
4579 PUSHs (sv_2mortal (newSVuv (tv [1])));
4580}
4581

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