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Comparing Coro/Coro/State.xs (file contents):
Revision 1.100 by root, Mon Nov 27 00:07:49 2006 UTC vs.
Revision 1.453 by root, Tue Jul 7 00:33:25 2015 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#define PERL_NO_GET_CONTEXT
9#define PERL_EXT
2 10
3#include "EXTERN.h" 11#include "EXTERN.h"
4#include "perl.h" 12#include "perl.h"
5#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
6 15
7#include "patchlevel.h" 16#include "schmorp.h"
8 17
9#define PERL_VERSION_ATLEAST(a,b,c) \ 18#define ECB_NO_THREADS 1
10 (PERL_REVISION > (a) \ 19#define ECB_NO_LIBM 1
11 || (PERL_REVISION == (a) \ 20#include "ecb.h"
12 && (PERL_VERSION > (b) \
13 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
14 21
15#if !PERL_VERSION_ATLEAST (5,6,0) 22#include <stddef.h>
16# ifndef PL_ppaddr
17# define PL_ppaddr ppaddr
18# endif
19# ifndef call_sv
20# define call_sv perl_call_sv
21# endif
22# ifndef get_sv
23# define get_sv perl_get_sv
24# endif
25# ifndef get_cv
26# define get_cv perl_get_cv
27# endif
28# ifndef IS_PADGV
29# define IS_PADGV(v) 0
30# endif
31# ifndef IS_PADCONST
32# define IS_PADCONST(v) 0
33# endif
34#endif
35
36#include <stdio.h> 23#include <stdio.h>
37#include <errno.h> 24#include <errno.h>
38
39#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
40# undef STACKGUARD
41#endif
42
43#ifndef STACKGUARD
44# define STACKGUARD 0
45#endif
46
47#ifdef HAVE_MMAP
48# include <unistd.h> 25#include <assert.h>
49# include <sys/mman.h> 26
50# ifndef MAP_ANONYMOUS 27#ifndef SvREFCNT_dec_NN
51# ifdef MAP_ANON 28 #define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv)
52# define MAP_ANONYMOUS MAP_ANON
53# else
54# undef HAVE_MMAP
55# endif 29#endif
30
31#ifndef SvREFCNT_inc_NN
32 #define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
33#endif
34
35#ifndef SVs_PADSTALE
36# define SVs_PADSTALE 0
37#endif
38
39#ifdef PadARRAY
40# define NEWPADAPI 1
41# define newPADLIST(var) (Newz (0, var, 1, PADLIST), Newx (PadlistARRAY (var), 2, PAD *))
42#else
43typedef AV PADNAMELIST;
44# if !PERL_VERSION_ATLEAST(5,8,0)
45typedef AV PADLIST;
46typedef AV PAD;
56# endif 47# endif
57# include <limits.h> 48# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
58# ifndef PAGESIZE 49# define PadlistMAX(pl) AvFILLp (pl)
59# define PAGESIZE pagesize 50# define PadlistNAMES(pl) (*PadlistARRAY (pl))
60# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 51# define PadARRAY AvARRAY
61static long pagesize; 52# define PadMAX AvFILLp
53# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
54#endif
55#ifndef PadnamelistREFCNT
56# define PadnamelistREFCNT(pnl) SvREFCNT (pnl)
57#endif
58#ifndef PadnamelistREFCNT_dec
59# define PadnamelistREFCNT_dec(pnl) SvREFCNT_dec (pnl)
60#endif
61
62/* 5.19.something has replaced SVt_BIND by SVt_INVLIST */
63/* we just alias it to SVt_IV, as that is sufficient for swap_sv for now */
64#if PERL_VERSION_ATLEAST(5,19,0)
65# define SVt_BIND SVt_IV
66#endif
67
68#if defined(_WIN32)
69# undef HAS_GETTIMEOFDAY
70# undef setjmp
71# undef longjmp
72# undef _exit
73# define setjmp _setjmp /* deep magic */
62# else 74#else
63# define BOOT_PAGESIZE 75# include <inttypes.h> /* most portable stdint.h */
76#endif
77
78/* the maximum number of idle cctx that will be pooled */
79static int cctx_max_idle = 4;
80
81#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
82# define HAS_SCOPESTACK_NAME 1
83#endif
84
85/* prefer perl internal functions over our own? */
86#ifndef CORO_PREFER_PERL_FUNCTIONS
87# define CORO_PREFER_PERL_FUNCTIONS 0
88#endif
89
90/* The next macros try to return the current stack pointer, in an as
91 * portable way as possible. */
92#if __GNUC__ >= 4
93# define dSTACKLEVEL int stacklevel_dummy
94# define STACKLEVEL __builtin_frame_address (0)
95#else
96# define dSTACKLEVEL volatile void *stacklevel
97# define STACKLEVEL ((void *)&stacklevel)
98#endif
99
100#define IN_DESTRUCT PL_dirty
101
102#include "CoroAPI.h"
103#define GCoroAPI (&coroapi) /* very sneaky */
104
105#ifdef USE_ITHREADS
106# if CORO_PTHREAD
107static void *coro_thx;
64# endif 108# endif
65#endif 109#endif
66 110
67/* The next macro should declare a variable stacklevel that contains and approximation 111#ifdef __linux
68 * to the current C stack pointer. Its property is that it changes with each call 112# include <time.h> /* for timespec */
69 * and should be unique. */ 113# include <syscall.h> /* for SYS_* */
70#define dSTACKLEVEL int stacklevel 114# ifdef SYS_clock_gettime
71#define STACKLEVEL ((void *)&stacklevel) 115# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
72 116# define CORO_CLOCK_MONOTONIC 1
73#define IN_DESTRUCT (PL_main_cv == Nullcv) 117# define CORO_CLOCK_THREAD_CPUTIME_ID 3
74
75#if __GNUC__ >= 3
76# define attribute(x) __attribute__(x)
77#else
78# define attribute(x)
79#endif 118# endif
80
81#define NOINLINE attribute ((noinline))
82
83#include "CoroAPI.h"
84
85#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
86
87#ifdef USE_ITHREADS
88static perl_mutex coro_mutex;
89# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
90# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
91#else
92# define LOCK (void)0
93# define UNLOCK (void)0
94#endif 119#endif
95 120
121static double (*nvtime)(); /* so why doesn't it take void? */
122static void (*u2time)(pTHX_ UV ret[2]);
123
124/* we hijack an hopefully unused CV flag for our purposes */
125#define CVf_SLF 0x4000
126static OP *pp_slf (pTHX);
127static void slf_destroy (pTHX_ struct coro *coro);
128
129static U32 cctx_gen;
130static size_t cctx_stacksize = CORO_STACKSIZE;
96static struct CoroAPI coroapi; 131static struct CoroAPI coroapi;
97static AV *main_mainstack; /* used to differentiate between $main and others */ 132static AV *main_mainstack; /* used to differentiate between $main and others */
133static JMPENV *main_top_env;
98static HV *coro_state_stash, *coro_stash; 134static HV *coro_state_stash, *coro_stash;
99static SV *coro_mortal; /* will be freed after next transfer */ 135static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
136
137static AV *av_destroy; /* destruction queue */
138static SV *sv_manager; /* the manager coro */
139static SV *sv_idle; /* $Coro::idle */
140
141static GV *irsgv; /* $/ */
142static GV *stdoutgv; /* *STDOUT */
143static SV *rv_diehook;
144static SV *rv_warnhook;
145static HV *hv_sig; /* %SIG */
146
147/* async_pool helper stuff */
148static SV *sv_pool_rss;
149static SV *sv_pool_size;
150static SV *sv_async_pool_idle; /* description string */
151static AV *av_async_pool; /* idle pool */
152static SV *sv_Coro; /* class string */
153static CV *cv_pool_handler;
154
155/* Coro::AnyEvent */
156static SV *sv_activity;
157
158/* enable processtime/realtime profiling */
159static char enable_times;
160typedef U32 coro_ts[2];
161static coro_ts time_real, time_cpu;
162static char times_valid;
163
164static struct coro_cctx *cctx_first;
165static int cctx_count, cctx_idle;
166
167enum
168{
169 CC_MAPPED = 0x01,
170 CC_NOREUSE = 0x02, /* throw this away after tracing */
171 CC_TRACE = 0x04,
172 CC_TRACE_SUB = 0x08, /* trace sub calls */
173 CC_TRACE_LINE = 0x10, /* trace each statement */
174 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
175};
100 176
101/* this is a structure representing a c-level coroutine */ 177/* this is a structure representing a c-level coroutine */
102typedef struct coro_stack { 178typedef struct coro_cctx
179{
103 struct coro_stack *next; 180 struct coro_cctx *next;
104 181
105 /* the stack */ 182 /* the stack */
106 void *sptr; 183 struct coro_stack stack;
107 long ssize; /* positive == mmap, otherwise malloc */
108 184
109 /* cpu state */ 185 /* cpu state */
110 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 186 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
187#ifndef NDEBUG
188 JMPENV *idle_te; /* same as idle_sp, but for top_env */
189#endif
111 JMPENV *top_env; 190 JMPENV *top_env;
112 coro_context cctx; 191 coro_context cctx;
113} coro_stack; 192
193 U32 gen;
194#if CORO_USE_VALGRIND
195 int valgrind_id;
196#endif
197 unsigned char flags;
198} coro_cctx;
199
200static coro_cctx *cctx_current; /* the currently running cctx */
201
202/*****************************************************************************/
203
204static MGVTBL coro_state_vtbl;
205
206enum
207{
208 CF_RUNNING = 0x0001, /* coroutine is running */
209 CF_READY = 0x0002, /* coroutine is ready */
210 CF_NEW = 0x0004, /* has never been switched to */
211 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
212 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
213 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
214};
215
216/* the structure where most of the perl state is stored, overlaid on the cxstack */
217typedef struct
218{
219 #define VARx(name,expr,type) type name;
220 #include "state.h"
221} perl_slots;
222
223/* how many context stack entries do we need for perl_slots */
224#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
114 225
115/* this is a structure representing a perl-level coroutine */ 226/* this is a structure representing a perl-level coroutine */
116struct coro { 227struct coro
228{
117 /* the c coroutine allocated to this perl coroutine, if any */ 229 /* the C coroutine allocated to this perl coroutine, if any */
118 coro_stack *stack; 230 coro_cctx *cctx;
119 231
120 /* data associated with this coroutine (initial args) */ 232 /* ready queue */
121 AV *args; 233 struct coro *next_ready;
122 int refcnt;
123 234
124 /* optionally saved, might be zero */ 235 /* state data */
125 AV *defav; 236 struct CoroSLF slf_frame; /* saved slf frame */
126 SV *defsv;
127 SV *errsv;
128
129 /* saved global state not related to stacks */
130 U8 dowarn;
131 I32 in_eval;
132
133 /* the stacks and related info (callchain etc..) */
134 PERL_SI *curstackinfo;
135 AV *curstack;
136 AV *mainstack; 237 AV *mainstack;
137 SV **stack_sp; 238 perl_slots *slot; /* basically the saved sp */
138 OP *op; 239
139 SV **curpad; 240 CV *startcv; /* the CV to execute */
140 AV *comppad; 241 AV *args; /* data associated with this coroutine (initial args) */
141 CV *compcv; 242 int flags; /* CF_ flags */
142 SV **stack_base; 243 HV *hv; /* the perl hash associated with this coro, if any */
143 SV **stack_max; 244
144 SV **tmps_stack; 245 /* statistics */
145 I32 tmps_floor; 246 int usecount; /* number of transfers to this coro */
146 I32 tmps_ix;
147 I32 tmps_max;
148 I32 *markstack;
149 I32 *markstack_ptr;
150 I32 *markstack_max;
151 I32 *scopestack;
152 I32 scopestack_ix;
153 I32 scopestack_max;
154 ANY *savestack;
155 I32 savestack_ix;
156 I32 savestack_max;
157 OP **retstack;
158 I32 retstack_ix;
159 I32 retstack_max;
160 PMOP *curpm;
161 COP *curcop;
162 247
163 /* coro process data */ 248 /* coro process data */
164 int prio; 249 int prio;
250 SV *except; /* exception to be thrown */
251 SV *rouse_cb; /* last rouse callback */
252 AV *on_destroy; /* callbacks or coros to notify on destroy */
253 AV *status; /* the exit status list */
254
255 /* async_pool */
256 SV *saved_deffh;
257 SV *invoke_cb;
258 AV *invoke_av;
259
260 /* on_enter/on_leave */
261 AV *on_enter; AV *on_enter_xs;
262 AV *on_leave; AV *on_leave_xs;
263
264 /* swap_sv */
265 AV *swap_sv;
266
267 /* times */
268 coro_ts t_cpu, t_real;
269
270 /* linked list */
271 struct coro *next, *prev;
165}; 272};
166 273
167typedef struct coro *Coro__State; 274typedef struct coro *Coro__State;
168typedef struct coro *Coro__State_or_hashref; 275typedef struct coro *Coro__State_or_hashref;
169 276
277/* the following variables are effectively part of the perl context */
278/* and get copied between struct coro and these variables */
279/* the main reason we don't support windows process emulation */
280static struct CoroSLF slf_frame; /* the current slf frame */
281
282/** Coro ********************************************************************/
283
284#define CORO_PRIO_MAX 3
285#define CORO_PRIO_HIGH 1
286#define CORO_PRIO_NORMAL 0
287#define CORO_PRIO_LOW -1
288#define CORO_PRIO_IDLE -3
289#define CORO_PRIO_MIN -4
290
291/* for Coro.pm */
292static SV *coro_current;
293static SV *coro_readyhook;
294static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
295static CV *cv_coro_run;
296static struct coro *coro_first;
297#define coro_nready coroapi.nready
298
299/** JIT *********************************************************************/
300
301#if CORO_JIT
302 /* APPLE doesn't have mmap though */
303 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
304 #ifndef CORO_JIT_TYPE
305 #if ECB_AMD64 && CORO_JIT_UNIXY
306 #define CORO_JIT_TYPE "amd64-unix"
307 #elif __i386 && CORO_JIT_UNIXY
308 #define CORO_JIT_TYPE "x86-unix"
309 #endif
310 #endif
311#endif
312
313#if !defined(CORO_JIT_TYPE) || _POSIX_MEMORY_PROTECTION <= 0
314 #undef CORO_JIT
315#endif
316
317#if CORO_JIT
318 typedef void (*load_save_perl_slots_type)(perl_slots *);
319 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
320#endif
321
322/** Coro::Select ************************************************************/
323
324static OP *(*coro_old_pp_sselect) (pTHX);
325static SV *coro_select_select;
326
327/* horrible hack, but if it works... */
170static AV * 328static OP *
329coro_pp_sselect (pTHX)
330{
331 dSP;
332 PUSHMARK (SP - 4); /* fake argument list */
333 XPUSHs (coro_select_select);
334 PUTBACK;
335
336 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
337 PL_op->op_flags |= OPf_STACKED;
338 PL_op->op_private = 0;
339 return PL_ppaddr [OP_ENTERSUB](aTHX);
340}
341
342/** time stuff **************************************************************/
343
344#ifdef HAS_GETTIMEOFDAY
345
346ecb_inline void
347coro_u2time (pTHX_ UV ret[2])
348{
349 struct timeval tv;
350 gettimeofday (&tv, 0);
351
352 ret [0] = tv.tv_sec;
353 ret [1] = tv.tv_usec;
354}
355
356ecb_inline double
357coro_nvtime (void)
358{
359 struct timeval tv;
360 gettimeofday (&tv, 0);
361
362 return tv.tv_sec + tv.tv_usec * 1e-6;
363}
364
365ecb_inline void
366time_init (pTHX)
367{
368 nvtime = coro_nvtime;
369 u2time = coro_u2time;
370}
371
372#else
373
374ecb_inline void
375time_init (pTHX)
376{
377 SV **svp;
378
379 require_pv ("Time/HiRes.pm");
380
381 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
382
383 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
384 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
385
386 nvtime = INT2PTR (double (*)(), SvIV (*svp));
387
388 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
389 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
390}
391
392#endif
393
394/** lowlevel stuff **********************************************************/
395
396static SV * ecb_noinline
397coro_get_sv (pTHX_ const char *name, int create)
398{
399#if PERL_VERSION_ATLEAST (5,10,0)
400 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
401 get_sv (name, create);
402#endif
403 return get_sv (name, create);
404}
405
406static AV * ecb_noinline
407coro_get_av (pTHX_ const char *name, int create)
408{
409#if PERL_VERSION_ATLEAST (5,10,0)
410 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
411 get_av (name, create);
412#endif
413 return get_av (name, create);
414}
415
416static HV * ecb_noinline
417coro_get_hv (pTHX_ const char *name, int create)
418{
419#if PERL_VERSION_ATLEAST (5,10,0)
420 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
421 get_hv (name, create);
422#endif
423 return get_hv (name, create);
424}
425
426ecb_inline void
427coro_times_update (void)
428{
429#ifdef coro_clock_gettime
430 struct timespec ts;
431
432 ts.tv_sec = ts.tv_nsec = 0;
433 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
434 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
435
436 ts.tv_sec = ts.tv_nsec = 0;
437 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
438 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
439#else
440 dTHX;
441 UV tv[2];
442
443 u2time (aTHX_ tv);
444 time_real [0] = tv [0];
445 time_real [1] = tv [1] * 1000;
446#endif
447}
448
449ecb_inline void
450coro_times_add (struct coro *c)
451{
452 c->t_real [1] += time_real [1];
453 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
454 c->t_real [0] += time_real [0];
455
456 c->t_cpu [1] += time_cpu [1];
457 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
458 c->t_cpu [0] += time_cpu [0];
459}
460
461ecb_inline void
462coro_times_sub (struct coro *c)
463{
464 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
465 c->t_real [1] -= time_real [1];
466 c->t_real [0] -= time_real [0];
467
468 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
469 c->t_cpu [1] -= time_cpu [1];
470 c->t_cpu [0] -= time_cpu [0];
471}
472
473/*****************************************************************************/
474/* magic glue */
475
476#define CORO_MAGIC_type_cv 26
477#define CORO_MAGIC_type_state PERL_MAGIC_ext
478
479#define CORO_MAGIC_NN(sv, type) \
480 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
481 ? SvMAGIC (sv) \
482 : mg_find (sv, type))
483
484#define CORO_MAGIC(sv, type) \
485 (ecb_expect_true (SvMAGIC (sv)) \
486 ? CORO_MAGIC_NN (sv, type) \
487 : 0)
488
489#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
490#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
491
492ecb_inline MAGIC *
493SvSTATEhv_p (pTHX_ SV *coro)
494{
495 MAGIC *mg;
496
497 if (ecb_expect_true (
498 SvTYPE (coro) == SVt_PVHV
499 && (mg = CORO_MAGIC_state (coro))
500 && mg->mg_virtual == &coro_state_vtbl
501 ))
502 return mg;
503
504 return 0;
505}
506
507ecb_inline struct coro *
508SvSTATE_ (pTHX_ SV *coro_sv)
509{
510 MAGIC *mg;
511
512 if (SvROK (coro_sv))
513 coro_sv = SvRV (coro_sv);
514
515 mg = SvSTATEhv_p (aTHX_ coro_sv);
516 if (!mg)
517 croak ("Coro::State object required");
518
519 return (struct coro *)mg->mg_ptr;
520}
521
522#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
523
524/* faster than SvSTATE, but expects a coroutine hv */
525#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
526#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
527
528/*****************************************************************************/
529/* padlist management and caching */
530
531ecb_inline PADLIST *
171coro_clone_padlist (CV *cv) 532coro_derive_padlist (pTHX_ CV *cv)
172{ 533{
173 AV *padlist = CvPADLIST (cv); 534 PADLIST *padlist = CvPADLIST (cv);
174 AV *newpadlist, *newpad; 535 PADLIST *newpadlist;
536 PADNAMELIST *padnames;
537 PAD *newpad;
538 PADOFFSET off = PadlistMAX (padlist) + 1;
175 539
176 newpadlist = newAV (); 540#if NEWPADAPI
541
542 /* if we had the original CvDEPTH, we might be able to steal the CvDEPTH+1 entry instead */
543 /* 20131102194744.GA6705@schmorp.de, 20131102195825.2013.qmail@lists-nntp.develooper.com */
544 while (!PadlistARRAY (padlist)[off - 1])
545 --off;
546
547 Perl_pad_push (aTHX_ padlist, off);
548
549 newpad = PadlistARRAY (padlist)[off];
550 PadlistARRAY (padlist)[off] = 0;
551
552#else
553
554#if PERL_VERSION_ATLEAST (5,10,0)
555 Perl_pad_push (aTHX_ padlist, off);
556#else
557 Perl_pad_push (aTHX_ padlist, off, 1);
558#endif
559
560 newpad = PadlistARRAY (padlist)[off];
561 PadlistMAX (padlist) = off - 1;
562
563#endif
564
565 newPADLIST (newpadlist);
566#if !PERL_VERSION_ATLEAST(5,15,3)
567 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
177 AvREAL_off (newpadlist); 568 AvREAL_off (newpadlist);
178#if PERL_VERSION_ATLEAST (5,9,0)
179 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
180#else
181 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
182#endif 569#endif
183 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
184 --AvFILLp (padlist);
185 570
186 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 571 /* Already extended to 2 elements by newPADLIST. */
187 av_store (newpadlist, 1, (SV *)newpad); 572 PadlistMAX (newpadlist) = 1;
573
574 padnames = PadlistNAMES (padlist);
575 ++PadnamelistREFCNT (padnames);
576 PadlistNAMES (newpadlist) = padnames;
577
578 PadlistARRAY (newpadlist)[1] = newpad;
188 579
189 return newpadlist; 580 return newpadlist;
190} 581}
191 582
192static void 583ecb_inline void
193free_padlist (AV *padlist) 584free_padlist (pTHX_ PADLIST *padlist)
194{ 585{
195 /* may be during global destruction */ 586 /* may be during global destruction */
196 if (SvREFCNT (padlist)) 587 if (!IN_DESTRUCT)
197 { 588 {
198 I32 i = AvFILLp (padlist); 589 I32 i = PadlistMAX (padlist);
199 while (i >= 0) 590
591 while (i > 0) /* special-case index 0 */
200 { 592 {
201 SV **svp = av_fetch (padlist, i--, FALSE); 593 /* we try to be extra-careful here */
594 PAD *pad = PadlistARRAY (padlist)[i--];
595
202 if (svp) 596 if (pad)
203 { 597 {
204 SV *sv; 598 I32 j = PadMAX (pad);
205 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 599
600 while (j >= 0)
206 SvREFCNT_dec (sv); 601 SvREFCNT_dec (PadARRAY (pad)[j--]);
207 602
603 PadMAX (pad) = -1;
208 SvREFCNT_dec (*svp); 604 SvREFCNT_dec (pad);
209 } 605 }
210 } 606 }
211 607
608 PadnamelistREFCNT_dec (PadlistNAMES (padlist));
609
610#if NEWPADAPI
611 Safefree (PadlistARRAY (padlist));
612 Safefree (padlist);
613#else
614 AvFILLp (padlist) = -1;
615 AvREAL_off (padlist);
212 SvREFCNT_dec ((SV*)padlist); 616 SvREFCNT_dec ((SV*)padlist);
617#endif
213 } 618 }
214} 619}
215 620
216static int 621static int
217coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 622coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
218{ 623{
219 AV *padlist; 624 PADLIST *padlist;
220 AV *av = (AV *)mg->mg_obj; 625 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
626 size_t len = *(size_t *)mg->mg_ptr;
221 627
222 /* casting is fun. */ 628 /* perl manages to free our internal AV and _then_ call us */
223 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 629 if (IN_DESTRUCT)
630 return 0;
631
632 while (len--)
224 free_padlist (padlist); 633 free_padlist (aTHX_ padlists[len]);
225
226 SvREFCNT_dec (av);
227 634
228 return 0; 635 return 0;
229} 636}
230 637
231#define PERL_MAGIC_coro PERL_MAGIC_ext 638static MGVTBL coro_cv_vtbl = {
232 639 0, 0, 0, 0,
233static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 640 coro_cv_free
641};
234 642
235/* the next two functions merely cache the padlists */ 643/* the next two functions merely cache the padlists */
236static void 644ecb_inline void
237get_padlist (CV *cv) 645get_padlist (pTHX_ CV *cv)
238{ 646{
239 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 647 MAGIC *mg = CORO_MAGIC_cv (cv);
648 size_t *lenp;
240 649
241 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 650 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
242 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 651 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
243 else 652 else
244 { 653 {
245#if 0 654#if CORO_PREFER_PERL_FUNCTIONS
246 /* this is probably cleaner, but also slower? */ 655 /* this is probably cleaner? but also slower! */
656 /* in practise, it seems to be less stable */
247 CV *cp = Perl_cv_clone (cv); 657 CV *cp = Perl_cv_clone (aTHX_ cv);
248 CvPADLIST (cv) = CvPADLIST (cp); 658 CvPADLIST (cv) = CvPADLIST (cp);
249 CvPADLIST (cp) = 0; 659 CvPADLIST (cp) = 0;
250 SvREFCNT_dec (cp); 660 SvREFCNT_dec (cp);
251#else 661#else
252 CvPADLIST (cv) = coro_clone_padlist (cv); 662 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
253#endif 663#endif
254 } 664 }
255} 665}
256 666
257static void 667ecb_inline void
258put_padlist (CV *cv) 668put_padlist (pTHX_ CV *cv)
259{ 669{
260 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 670 MAGIC *mg = CORO_MAGIC_cv (cv);
261 671
262 if (!mg) 672 if (ecb_expect_false (!mg))
263 {
264 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
265 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
266 mg->mg_virtual = &vtbl_coro;
267 mg->mg_obj = (SV *)newAV ();
268 } 673 {
674 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
675 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
676 mg->mg_len = 1; /* so mg_free frees mg_ptr */
677 }
678 else
679 Renew (mg->mg_ptr,
680 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
681 char);
269 682
270 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 683 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
271} 684}
272 685
273#define SB do { 686/** load & save, init *******************************************************/
274#define SE } while (0)
275 687
276#define LOAD(state) load_state((state)); 688ecb_inline void
277#define SAVE(state,flags) save_state((state),(flags)); 689swap_sv (SV *a, SV *b)
690{
691 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
692 SV tmp;
278 693
279#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 694 /* swap sv_any */
695 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
280 696
697 /* swap sv_flags */
698 SvFLAGS (&tmp) = SvFLAGS (a);
699 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
700 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
701
702#if PERL_VERSION_ATLEAST (5,10,0)
703 /* perl 5.10 and later complicates this _quite_ a bit, but it also
704 * is much faster, so no quarrels here. alternatively, we could
705 * sv_upgrade to avoid this.
706 */
707 {
708 /* swap sv_u */
709 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
710
711 /* if SvANY points to the head, we need to adjust the pointers,
712 * as the pointer for a still points to b, and maybe vice versa.
713 */
714 U32 svany_in_head_set = (1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV);
715 #if NVSIZE <= IVSIZE && PERL_VERSION_ATLEAST(5,20,0)
716 svany_in_head_set |= 1 << SVt_NV;
717 #endif
718
719 #define svany_in_head(type) (svany_in_head_set & (1 << (type)))
720
721 if (svany_in_head (SvTYPE (a)))
722 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
723
724 if (svany_in_head (SvTYPE (b)))
725 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
726 }
727#endif
728}
729
730/* swap sv heads, at least logically */
281static void 731static void
732swap_svs (pTHX_ Coro__State c)
733{
734 int i;
735
736 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
737 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
738}
739
740#define SWAP_SVS(coro) \
741 if (ecb_expect_false ((coro)->swap_sv)) \
742 swap_svs (aTHX_ (coro))
743
744static void
745on_enterleave_call (pTHX_ SV *cb);
746
747static void
282load_state(Coro__State c) 748load_perl (pTHX_ Coro__State c)
283{ 749{
284 PL_dowarn = c->dowarn; 750 perl_slots *slot = c->slot;
285 PL_in_eval = c->in_eval; 751 c->slot = 0;
286 752
287 PL_curstackinfo = c->curstackinfo;
288 PL_curstack = c->curstack;
289 PL_mainstack = c->mainstack; 753 PL_mainstack = c->mainstack;
290 PL_stack_sp = c->stack_sp;
291 PL_op = c->op;
292 PL_curpad = c->curpad;
293 PL_comppad = c->comppad;
294 PL_compcv = c->compcv;
295 PL_stack_base = c->stack_base;
296 PL_stack_max = c->stack_max;
297 PL_tmps_stack = c->tmps_stack;
298 PL_tmps_floor = c->tmps_floor;
299 PL_tmps_ix = c->tmps_ix;
300 PL_tmps_max = c->tmps_max;
301 PL_markstack = c->markstack;
302 PL_markstack_ptr = c->markstack_ptr;
303 PL_markstack_max = c->markstack_max;
304 PL_scopestack = c->scopestack;
305 PL_scopestack_ix = c->scopestack_ix;
306 PL_scopestack_max = c->scopestack_max;
307 PL_savestack = c->savestack;
308 PL_savestack_ix = c->savestack_ix;
309 PL_savestack_max = c->savestack_max;
310#if !PERL_VERSION_ATLEAST (5,9,0)
311 PL_retstack = c->retstack;
312 PL_retstack_ix = c->retstack_ix;
313 PL_retstack_max = c->retstack_max;
314#endif
315 PL_curpm = c->curpm;
316 PL_curcop = c->curcop;
317 754
318 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 755#if CORO_JIT
319 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 756 load_perl_slots (slot);
320 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 757#else
758 #define VARx(name,expr,type) expr = slot->name;
759 #include "state.h"
760#endif
321 761
322 { 762 {
323 dSP; 763 dSP;
764
324 CV *cv; 765 CV *cv;
325 766
326 /* now do the ugly restore mess */ 767 /* now do the ugly restore mess */
327 while ((cv = (CV *)POPs)) 768 while (ecb_expect_true (cv = (CV *)POPs))
328 { 769 {
329 AV *padlist = (AV *)POPs;
330
331 if (padlist)
332 {
333 put_padlist (cv); /* mark this padlist as available */ 770 put_padlist (aTHX_ cv); /* mark this padlist as available */
334 CvPADLIST(cv) = padlist; 771 CvDEPTH (cv) = PTR2IV (POPs);
335 } 772 CvPADLIST (cv) = (PADLIST *)POPs;
336
337 ++CvDEPTH(cv);
338 } 773 }
339 774
340 PUTBACK; 775 PUTBACK;
341 } 776 }
342}
343 777
778 slf_frame = c->slf_frame;
779 CORO_THROW = c->except;
780
781 if (ecb_expect_false (enable_times))
782 {
783 if (ecb_expect_false (!times_valid))
784 coro_times_update ();
785
786 coro_times_sub (c);
787 }
788
789 if (ecb_expect_false (c->on_enter))
790 {
791 int i;
792
793 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
794 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
795 }
796
797 if (ecb_expect_false (c->on_enter_xs))
798 {
799 int i;
800
801 for (i = 0; i <= AvFILLp (c->on_enter_xs); i += 2)
802 ((coro_enterleave_hook)AvARRAY (c->on_enter_xs)[i]) (aTHX_ AvARRAY (c->on_enter_xs)[i + 1]);
803 }
804
805 SWAP_SVS (c);
806}
807
344static void 808static void
345save_state(Coro__State c, int flags) 809save_perl (pTHX_ Coro__State c)
346{ 810{
811 SWAP_SVS (c);
812
813 if (ecb_expect_false (c->on_leave_xs))
814 {
815 int i;
816
817 for (i = AvFILLp (c->on_leave_xs) - 1; i >= 0; i -= 2)
818 ((coro_enterleave_hook)AvARRAY (c->on_leave_xs)[i]) (aTHX_ AvARRAY (c->on_leave_xs)[i + 1]);
819 }
820
821 if (ecb_expect_false (c->on_leave))
822 {
823 int i;
824
825 for (i = AvFILLp (c->on_leave); i >= 0; --i)
826 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
827 }
828
829 times_valid = 0;
830
831 if (ecb_expect_false (enable_times))
832 {
833 coro_times_update (); times_valid = 1;
834 coro_times_add (c);
835 }
836
837 c->except = CORO_THROW;
838 c->slf_frame = slf_frame;
839
347 { 840 {
348 dSP; 841 dSP;
349 I32 cxix = cxstack_ix; 842 I32 cxix = cxstack_ix;
350 PERL_CONTEXT *ccstk = cxstack; 843 PERL_CONTEXT *ccstk = cxstack;
351 PERL_SI *top_si = PL_curstackinfo; 844 PERL_SI *top_si = PL_curstackinfo;
… …
353 /* 846 /*
354 * the worst thing you can imagine happens first - we have to save 847 * the worst thing you can imagine happens first - we have to save
355 * (and reinitialize) all cv's in the whole callchain :( 848 * (and reinitialize) all cv's in the whole callchain :(
356 */ 849 */
357 850
358 PUSHs (Nullsv); 851 XPUSHs (Nullsv);
359 /* this loop was inspired by pp_caller */ 852 /* this loop was inspired by pp_caller */
360 for (;;) 853 for (;;)
361 { 854 {
362 while (cxix >= 0) 855 while (ecb_expect_true (cxix >= 0))
363 { 856 {
364 PERL_CONTEXT *cx = &ccstk[cxix--]; 857 PERL_CONTEXT *cx = &ccstk[cxix--];
365 858
366 if (CxTYPE(cx) == CXt_SUB) 859 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
367 { 860 {
368 CV *cv = cx->blk_sub.cv; 861 CV *cv = cx->blk_sub.cv;
862
369 if (CvDEPTH(cv)) 863 if (ecb_expect_true (CvDEPTH (cv)))
370 { 864 {
371 EXTEND (SP, CvDEPTH(cv)*2); 865 EXTEND (SP, 3);
372
373 while (--CvDEPTH(cv))
374 {
375 /* this tells the restore code to increment CvDEPTH */
376 PUSHs (Nullsv);
377 PUSHs ((SV *)cv);
378 }
379
380 PUSHs ((SV *)CvPADLIST(cv)); 866 PUSHs ((SV *)CvPADLIST (cv));
867 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
381 PUSHs ((SV *)cv); 868 PUSHs ((SV *)cv);
382 869
870 CvDEPTH (cv) = 0;
383 get_padlist (cv); 871 get_padlist (aTHX_ cv);
384 } 872 }
385 } 873 }
386#ifdef CXt_FORMAT
387 else if (CxTYPE(cx) == CXt_FORMAT)
388 {
389 /* I never used formats, so how should I know how these are implemented? */
390 /* my bold guess is as a simple, plain sub... */
391 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
392 }
393#endif
394 } 874 }
395 875
396 if (top_si->si_type == PERLSI_MAIN) 876 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
397 break; 877 break;
398 878
399 top_si = top_si->si_prev; 879 top_si = top_si->si_prev;
400 ccstk = top_si->si_cxstack; 880 ccstk = top_si->si_cxstack;
401 cxix = top_si->si_cxix; 881 cxix = top_si->si_cxix;
402 } 882 }
403 883
404 PUTBACK; 884 PUTBACK;
405 } 885 }
406 886
407 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 887 /* allocate some space on the context stack for our purposes */
408 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 888 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
409 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 889 {
890 unsigned int i;
410 891
411 c->dowarn = PL_dowarn; 892 for (i = 0; i < SLOT_COUNT; ++i)
412 c->in_eval = PL_in_eval; 893 CXINC;
413 894
414 c->curstackinfo = PL_curstackinfo; 895 cxstack_ix -= SLOT_COUNT; /* undo allocation */
415 c->curstack = PL_curstack; 896 }
897
416 c->mainstack = PL_mainstack; 898 c->mainstack = PL_mainstack;
417 c->stack_sp = PL_stack_sp; 899
418 c->op = PL_op; 900 {
419 c->curpad = PL_curpad; 901 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
420 c->comppad = PL_comppad; 902
421 c->compcv = PL_compcv; 903#if CORO_JIT
422 c->stack_base = PL_stack_base; 904 save_perl_slots (slot);
423 c->stack_max = PL_stack_max; 905#else
424 c->tmps_stack = PL_tmps_stack; 906 #define VARx(name,expr,type) slot->name = expr;
425 c->tmps_floor = PL_tmps_floor; 907 #include "state.h"
426 c->tmps_ix = PL_tmps_ix;
427 c->tmps_max = PL_tmps_max;
428 c->markstack = PL_markstack;
429 c->markstack_ptr = PL_markstack_ptr;
430 c->markstack_max = PL_markstack_max;
431 c->scopestack = PL_scopestack;
432 c->scopestack_ix = PL_scopestack_ix;
433 c->scopestack_max = PL_scopestack_max;
434 c->savestack = PL_savestack;
435 c->savestack_ix = PL_savestack_ix;
436 c->savestack_max = PL_savestack_max;
437#if !PERL_VERSION_ATLEAST (5,9,0)
438 c->retstack = PL_retstack;
439 c->retstack_ix = PL_retstack_ix;
440 c->retstack_max = PL_retstack_max;
441#endif 908#endif
442 c->curpm = PL_curpm; 909 }
443 c->curcop = PL_curcop;
444} 910}
445 911
446/* 912/*
447 * allocate various perl stacks. This is an exact copy 913 * allocate various perl stacks. This is almost an exact copy
448 * of perl.c:init_stacks, except that it uses less memory 914 * of perl.c:init_stacks, except that it uses less memory
449 * on the (sometimes correct) assumption that coroutines do 915 * on the (sometimes correct) assumption that coroutines do
450 * not usually need a lot of stackspace. 916 * not usually need a lot of stackspace.
451 */ 917 */
918#if CORO_PREFER_PERL_FUNCTIONS
919# define coro_init_stacks(thx) init_stacks ()
920#else
452static void 921static void
453coro_init_stacks () 922coro_init_stacks (pTHX)
454{ 923{
455 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 924 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
456 PL_curstackinfo->si_type = PERLSI_MAIN; 925 PL_curstackinfo->si_type = PERLSI_MAIN;
457 PL_curstack = PL_curstackinfo->si_stack; 926 PL_curstack = PL_curstackinfo->si_stack;
458 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 927 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
459 928
460 PL_stack_base = AvARRAY(PL_curstack); 929 PL_stack_base = AvARRAY(PL_curstack);
461 PL_stack_sp = PL_stack_base; 930 PL_stack_sp = PL_stack_base;
462 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 931 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
463 932
464 New(50,PL_tmps_stack,96,SV*); 933 New(50,PL_tmps_stack,32,SV*);
465 PL_tmps_floor = -1; 934 PL_tmps_floor = -1;
466 PL_tmps_ix = -1; 935 PL_tmps_ix = -1;
467 PL_tmps_max = 96; 936 PL_tmps_max = 32;
468 937
469 New(54,PL_markstack,16,I32); 938 New(54,PL_markstack,16,I32);
470 PL_markstack_ptr = PL_markstack; 939 PL_markstack_ptr = PL_markstack;
471 PL_markstack_max = PL_markstack + 16; 940 PL_markstack_max = PL_markstack + 16;
472 941
473#ifdef SET_MARK_OFFSET 942#ifdef SET_MARK_OFFSET
474 SET_MARK_OFFSET; 943 SET_MARK_OFFSET;
475#endif 944#endif
476 945
477 New(54,PL_scopestack,16,I32); 946 New(54,PL_scopestack,8,I32);
478 PL_scopestack_ix = 0; 947 PL_scopestack_ix = 0;
479 PL_scopestack_max = 16; 948 PL_scopestack_max = 8;
949#if HAS_SCOPESTACK_NAME
950 New(54,PL_scopestack_name,8,const char*);
951#endif
480 952
481 New(54,PL_savestack,96,ANY); 953 New(54,PL_savestack,24,ANY);
482 PL_savestack_ix = 0; 954 PL_savestack_ix = 0;
483 PL_savestack_max = 96; 955 PL_savestack_max = 24;
484 956
485#if !PERL_VERSION_ATLEAST (5,9,0) 957#if !PERL_VERSION_ATLEAST (5,10,0)
486 New(54,PL_retstack,8,OP*); 958 New(54,PL_retstack,4,OP*);
487 PL_retstack_ix = 0; 959 PL_retstack_ix = 0;
488 PL_retstack_max = 8; 960 PL_retstack_max = 4;
489#endif 961#endif
490} 962}
963#endif
491 964
492/* 965/*
493 * destroy the stacks, the callchain etc... 966 * destroy the stacks, the callchain etc...
494 */ 967 */
495static void 968static void
496destroy_stacks() 969coro_destruct_stacks (pTHX)
497{ 970{
498 if (!IN_DESTRUCT)
499 {
500 /* is this ugly, I ask? */
501 LEAVE_SCOPE (0);
502
503 /* sure it is, but more important: is it correct?? :/ */
504 FREETMPS;
505
506 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
507 }
508
509 while (PL_curstackinfo->si_next) 971 while (PL_curstackinfo->si_next)
510 PL_curstackinfo = PL_curstackinfo->si_next; 972 PL_curstackinfo = PL_curstackinfo->si_next;
511 973
512 while (PL_curstackinfo) 974 while (PL_curstackinfo)
513 { 975 {
514 PERL_SI *p = PL_curstackinfo->si_prev; 976 PERL_SI *p = PL_curstackinfo->si_prev;
515 977
516 { /*D*//*remove*/
517 dSP;
518 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
519 PUTBACK; /* possibly superfluous */
520 }
521
522 if (!IN_DESTRUCT) 978 if (!IN_DESTRUCT)
523 {
524 dounwind (-1);/*D*//*remove*/
525 SvREFCNT_dec (PL_curstackinfo->si_stack); 979 SvREFCNT_dec (PL_curstackinfo->si_stack);
526 }
527 980
528 Safefree (PL_curstackinfo->si_cxstack); 981 Safefree (PL_curstackinfo->si_cxstack);
529 Safefree (PL_curstackinfo); 982 Safefree (PL_curstackinfo);
530 PL_curstackinfo = p; 983 PL_curstackinfo = p;
531 } 984 }
532 985
533 Safefree (PL_tmps_stack); 986 Safefree (PL_tmps_stack);
534 Safefree (PL_markstack); 987 Safefree (PL_markstack);
535 Safefree (PL_scopestack); 988 Safefree (PL_scopestack);
989#if HAS_SCOPESTACK_NAME
990 Safefree (PL_scopestack_name);
991#endif
536 Safefree (PL_savestack); 992 Safefree (PL_savestack);
537#if !PERL_VERSION_ATLEAST (5,9,0) 993#if !PERL_VERSION_ATLEAST (5,10,0)
538 Safefree (PL_retstack); 994 Safefree (PL_retstack);
539#endif 995#endif
540} 996}
541 997
998#define CORO_RSS \
999 rss += sizeof (SYM (curstackinfo)); \
1000 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
1001 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
1002 rss += SYM (tmps_max) * sizeof (SV *); \
1003 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
1004 rss += SYM (scopestack_max) * sizeof (I32); \
1005 rss += SYM (savestack_max) * sizeof (ANY);
1006
1007static size_t
1008coro_rss (pTHX_ struct coro *coro)
1009{
1010 size_t rss = sizeof (*coro);
1011
1012 if (coro->mainstack)
1013 {
1014 if (coro->flags & CF_RUNNING)
1015 {
1016 #define SYM(sym) PL_ ## sym
1017 CORO_RSS;
1018 #undef SYM
1019 }
1020 else
1021 {
1022 #define SYM(sym) coro->slot->sym
1023 CORO_RSS;
1024 #undef SYM
1025 }
1026 }
1027
1028 return rss;
1029}
1030
1031/** coroutine stack handling ************************************************/
1032
1033static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
1034static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
1035static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
1036
1037/* apparently < 5.8.8 */
1038#ifndef MgPV_nolen_const
1039#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
1040 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
1041 (const char*)(mg)->mg_ptr)
1042#endif
1043
1044/*
1045 * This overrides the default magic get method of %SIG elements.
1046 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
1047 * and instead of trying to save and restore the hash elements (extremely slow),
1048 * we just provide our own readback here.
1049 */
1050static int ecb_cold
1051coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
1052{
1053 const char *s = MgPV_nolen_const (mg);
1054
1055 if (*s == '_')
1056 {
1057 SV **svp = 0;
1058
1059 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1060 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1061
1062 if (svp)
1063 {
1064 SV *ssv;
1065
1066 if (!*svp)
1067 ssv = &PL_sv_undef;
1068 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1069 ssv = sv_2mortal (newRV_inc (*svp));
1070 else
1071 ssv = *svp;
1072
1073 sv_setsv (sv, ssv);
1074 return 0;
1075 }
1076 }
1077
1078 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1079}
1080
1081static int ecb_cold
1082coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1083{
1084 const char *s = MgPV_nolen_const (mg);
1085
1086 if (*s == '_')
1087 {
1088 SV **svp = 0;
1089
1090 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1091 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1092
1093 if (svp)
1094 {
1095 SV *old = *svp;
1096 *svp = 0;
1097 SvREFCNT_dec (old);
1098 return 0;
1099 }
1100 }
1101
1102 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1103}
1104
1105static int ecb_cold
1106coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1107{
1108 const char *s = MgPV_nolen_const (mg);
1109
1110 if (*s == '_')
1111 {
1112 SV **svp = 0;
1113
1114 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1115 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1116
1117 if (svp)
1118 {
1119 SV *old = *svp;
1120 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1121 SvREFCNT_dec (old);
1122 return 0;
1123 }
1124 }
1125
1126 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1127}
1128
1129static void
1130prepare_nop (pTHX_ struct coro_transfer_args *ta)
1131{
1132 /* kind of mega-hacky, but works */
1133 ta->next = ta->prev = (struct coro *)ta;
1134}
1135
542static void 1136static int
543setup_coro (struct coro *coro) 1137slf_check_nop (pTHX_ struct CoroSLF *frame)
1138{
1139 return 0;
1140}
1141
1142static int
1143slf_check_repeat (pTHX_ struct CoroSLF *frame)
1144{
1145 return 1;
1146}
1147
1148static UNOP init_perl_op;
1149
1150ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1151init_perl (pTHX_ struct coro *coro)
544{ 1152{
545 /* 1153 /*
546 * emulate part of the perl startup here. 1154 * emulate part of the perl startup here.
547 */ 1155 */
1156 coro_init_stacks (aTHX);
1157
1158 PL_runops = RUNOPS_DEFAULT;
1159 PL_curcop = &PL_compiling;
1160 PL_in_eval = EVAL_NULL;
1161 PL_comppad = 0;
1162 PL_comppad_name = 0;
1163 PL_comppad_name_fill = 0;
1164 PL_comppad_name_floor = 0;
1165 PL_curpm = 0;
1166 PL_curpad = 0;
1167 PL_localizing = 0;
1168 PL_restartop = 0;
1169#if PERL_VERSION_ATLEAST (5,10,0)
1170 PL_parser = 0;
1171#endif
1172 PL_hints = 0;
1173
1174 /* recreate the die/warn hooks */
1175 PL_diehook = SvREFCNT_inc (rv_diehook);
1176 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1177
1178 GvSV (PL_defgv) = newSV (0);
1179 GvAV (PL_defgv) = coro->args; coro->args = 0;
1180 GvSV (PL_errgv) = newSV (0);
1181 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1182 GvHV (PL_hintgv) = newHV ();
1183#if PERL_VERSION_ATLEAST (5,10,0)
1184 hv_magic (GvHV (PL_hintgv), 0, PERL_MAGIC_hints);
1185#endif
1186 PL_rs = newSVsv (GvSV (irsgv));
1187 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1188
1189 {
1190 dSP;
1191 UNOP myop;
1192
1193 Zero (&myop, 1, UNOP);
1194 myop.op_next = Nullop;
1195 myop.op_type = OP_ENTERSUB;
1196 myop.op_flags = OPf_WANT_VOID;
1197
1198 PUSHMARK (SP);
1199 PUSHs ((SV *)coro->startcv);
1200 PUTBACK;
1201 PL_op = (OP *)&myop;
1202 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1203 }
1204
1205 /* this newly created coroutine might be run on an existing cctx which most
1206 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1207 */
1208 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1209 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1210 slf_frame.destroy = 0;
1211
1212 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1213 init_perl_op.op_next = PL_op;
1214 init_perl_op.op_type = OP_ENTERSUB;
1215 init_perl_op.op_ppaddr = pp_slf;
1216 /* no flags etc. required, as an init function won't be called */
1217
1218 PL_op = (OP *)&init_perl_op;
1219
1220 /* copy throw, in case it was set before init_perl */
1221 CORO_THROW = coro->except;
1222
1223 SWAP_SVS (coro);
1224
1225 if (ecb_expect_false (enable_times))
1226 {
1227 coro_times_update ();
1228 coro_times_sub (coro);
1229 }
1230}
1231
1232static void
1233coro_unwind_stacks (pTHX)
1234{
1235 if (!IN_DESTRUCT)
1236 {
1237 /* restore all saved variables and stuff */
1238 LEAVE_SCOPE (0);
1239 assert (PL_tmps_floor == -1);
1240
1241 /* free all temporaries */
1242 FREETMPS;
1243 assert (PL_tmps_ix == -1);
1244
1245 /* unwind all extra stacks */
1246 POPSTACK_TO (PL_mainstack);
1247
1248 /* unwind main stack */
1249 dounwind (-1);
1250 }
1251}
1252
1253static void
1254destroy_perl (pTHX_ struct coro *coro)
1255{
1256 SV *svf [9];
1257
1258 {
1259 SV *old_current = SvRV (coro_current);
1260 struct coro *current = SvSTATE (old_current);
1261
1262 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1263
1264 save_perl (aTHX_ current);
1265
1266 /* this will cause transfer_check to croak on block*/
1267 SvRV_set (coro_current, (SV *)coro->hv);
1268
1269 load_perl (aTHX_ coro);
1270
1271 coro_unwind_stacks (aTHX);
1272
1273 /* restore swapped sv's */
1274 SWAP_SVS (coro);
1275
1276 coro_destruct_stacks (aTHX);
1277
1278 /* now save some sv's to be free'd later */
1279 svf [0] = GvSV (PL_defgv);
1280 svf [1] = (SV *)GvAV (PL_defgv);
1281 svf [2] = GvSV (PL_errgv);
1282 svf [3] = (SV *)PL_defoutgv;
1283 svf [4] = PL_rs;
1284 svf [5] = GvSV (irsgv);
1285 svf [6] = (SV *)GvHV (PL_hintgv);
1286 svf [7] = PL_diehook;
1287 svf [8] = PL_warnhook;
1288 assert (9 == sizeof (svf) / sizeof (*svf));
1289
1290 SvRV_set (coro_current, old_current);
1291
1292 load_perl (aTHX_ current);
1293 }
1294
1295 {
1296 unsigned int i;
1297
1298 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1299 SvREFCNT_dec (svf [i]);
1300
1301 SvREFCNT_dec (coro->saved_deffh);
1302 SvREFCNT_dec (coro->rouse_cb);
1303 SvREFCNT_dec (coro->invoke_cb);
1304 SvREFCNT_dec (coro->invoke_av);
1305 SvREFCNT_dec (coro->on_enter_xs);
1306 SvREFCNT_dec (coro->on_leave_xs);
1307 }
1308}
1309
1310ecb_inline void
1311free_coro_mortal (pTHX)
1312{
1313 if (ecb_expect_true (coro_mortal))
1314 {
1315 SvREFCNT_dec ((SV *)coro_mortal);
1316 coro_mortal = 0;
1317 }
1318}
1319
1320static int
1321runops_trace (pTHX)
1322{
1323 COP *oldcop = 0;
1324 int oldcxix = -2;
1325
1326 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1327 {
1328 PERL_ASYNC_CHECK ();
1329
1330 if (cctx_current->flags & CC_TRACE_ALL)
1331 {
1332 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1333 {
1334 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1335 SV **bot, **top;
1336 AV *av = newAV (); /* return values */
1337 SV **cb;
1338 dSP;
1339
1340 GV *gv = CvGV (cx->blk_sub.cv);
1341 SV *fullname = sv_2mortal (newSV (0));
1342 if (isGV (gv))
1343 gv_efullname3 (fullname, gv, 0);
1344
1345 bot = PL_stack_base + cx->blk_oldsp + 1;
1346 top = cx->blk_gimme == G_ARRAY ? SP + 1
1347 : cx->blk_gimme == G_SCALAR ? bot + 1
1348 : bot;
1349
1350 av_extend (av, top - bot);
1351 while (bot < top)
1352 av_push (av, SvREFCNT_inc_NN (*bot++));
1353
1354 PL_runops = RUNOPS_DEFAULT;
1355 ENTER;
1356 SAVETMPS;
1357 EXTEND (SP, 3);
1358 PUSHMARK (SP);
1359 PUSHs (&PL_sv_no);
1360 PUSHs (fullname);
1361 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1362 PUTBACK;
1363 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1364 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1365 SPAGAIN;
1366 FREETMPS;
1367 LEAVE;
1368 PL_runops = runops_trace;
1369 }
1370
1371 if (oldcop != PL_curcop)
1372 {
1373 oldcop = PL_curcop;
1374
1375 if (PL_curcop != &PL_compiling)
1376 {
1377 SV **cb;
1378
1379 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB && cxstack_ix >= 0)
1380 {
1381 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1382
1383 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1384 {
1385 dSP;
1386 GV *gv = CvGV (cx->blk_sub.cv);
1387 SV *fullname = sv_2mortal (newSV (0));
1388
1389 if (isGV (gv))
1390 gv_efullname3 (fullname, gv, 0);
1391
1392 PL_runops = RUNOPS_DEFAULT;
1393 ENTER;
1394 SAVETMPS;
1395 EXTEND (SP, 3);
1396 PUSHMARK (SP);
1397 PUSHs (&PL_sv_yes);
1398 PUSHs (fullname);
1399 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1400 PUTBACK;
1401 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1402 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1403 SPAGAIN;
1404 FREETMPS;
1405 LEAVE;
1406 PL_runops = runops_trace;
1407 }
1408
1409 oldcxix = cxstack_ix;
1410 }
1411
1412 if (cctx_current->flags & CC_TRACE_LINE)
1413 {
1414 dSP;
1415
1416 PL_runops = RUNOPS_DEFAULT;
1417 ENTER;
1418 SAVETMPS;
1419 EXTEND (SP, 3);
1420 PL_runops = RUNOPS_DEFAULT;
1421 PUSHMARK (SP);
1422 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1423 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1424 PUTBACK;
1425 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1426 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1427 SPAGAIN;
1428 FREETMPS;
1429 LEAVE;
1430 PL_runops = runops_trace;
1431 }
1432 }
1433 }
1434 }
1435 }
1436
1437 TAINT_NOT;
1438 return 0;
1439}
1440
1441static struct CoroSLF cctx_ssl_frame;
1442
1443static void
1444slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1445{
1446 ta->prev = 0;
1447}
1448
1449static int
1450slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1451{
1452 *frame = cctx_ssl_frame;
1453
1454 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1455}
1456
1457/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1458static void ecb_noinline
1459cctx_prepare (pTHX)
1460{
1461 PL_top_env = &PL_start_env;
1462
1463 if (cctx_current->flags & CC_TRACE)
1464 PL_runops = runops_trace;
1465
1466 /* we already must be executing an SLF op, there is no other valid way
1467 * that can lead to creation of a new cctx */
1468 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1469 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1470
1471 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1472 cctx_ssl_frame = slf_frame;
1473
1474 slf_frame.prepare = slf_prepare_set_stacklevel;
1475 slf_frame.check = slf_check_set_stacklevel;
1476}
1477
1478/* the tail of transfer: execute stuff we can only do after a transfer */
1479ecb_inline void
1480transfer_tail (pTHX)
1481{
1482 free_coro_mortal (aTHX);
1483}
1484
1485/* try to exit the same way perl's main function would do */
1486/* we do not bother resetting the environment or other things *7
1487/* that are not, uhm, essential */
1488/* this obviously also doesn't work when perl is embedded */
1489static void ecb_noinline ecb_cold
1490perlish_exit (pTHX)
1491{
1492 int exitstatus = perl_destruct (PL_curinterp);
1493 perl_free (PL_curinterp);
1494 exit (exitstatus);
1495}
1496
1497/*
1498 * this is a _very_ stripped down perl interpreter ;)
1499 */
1500static void
1501cctx_run (void *arg)
1502{
1503#ifdef USE_ITHREADS
1504# if CORO_PTHREAD
1505 PERL_SET_CONTEXT (coro_thx);
1506# endif
1507#endif
1508 {
1509 dTHX;
1510
1511 /* normally we would need to skip the entersub here */
1512 /* not doing so will re-execute it, which is exactly what we want */
1513 /* PL_nop = PL_nop->op_next */
1514
1515 /* inject a fake subroutine call to cctx_init */
1516 cctx_prepare (aTHX);
1517
1518 /* cctx_run is the alternative tail of transfer() */
1519 transfer_tail (aTHX);
1520
1521 /* somebody or something will hit me for both perl_run and PL_restartop */
1522 PL_restartop = PL_op;
1523 perl_run (PL_curinterp);
1524 /*
1525 * Unfortunately, there is no way to get at the return values of the
1526 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1527 * runtime errors here, as this is just a random interpreter, not a thread.
1528 */
1529
1530 /*
1531 * If perl-run returns we assume exit() was being called or the coro
1532 * fell off the end, which seems to be the only valid (non-bug)
1533 * reason for perl_run to return. We try to mimic whatever perl is normally
1534 * doing in that case. YMMV.
1535 */
1536 perlish_exit (aTHX);
1537 }
1538}
1539
1540static coro_cctx *
1541cctx_new (void)
1542{
1543 coro_cctx *cctx;
1544
1545 ++cctx_count;
1546 New (0, cctx, 1, coro_cctx);
1547
1548 cctx->gen = cctx_gen;
1549 cctx->flags = 0;
1550 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1551
1552 return cctx;
1553}
1554
1555/* create a new cctx only suitable as source */
1556static coro_cctx *
1557cctx_new_empty (void)
1558{
1559 coro_cctx *cctx = cctx_new ();
1560
1561 cctx->stack.sptr = 0;
1562 coro_create (&cctx->cctx, 0, 0, 0, 0);
1563
1564 return cctx;
1565}
1566
1567/* create a new cctx suitable as destination/running a perl interpreter */
1568static coro_cctx *
1569cctx_new_run (void)
1570{
1571 coro_cctx *cctx = cctx_new ();
1572
1573 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
1574 {
1575 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1576 _exit (EXIT_FAILURE);
1577 }
1578
1579 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
1580
1581 return cctx;
1582}
1583
1584static void
1585cctx_destroy (coro_cctx *cctx)
1586{
1587 if (!cctx)
1588 return;
1589
1590 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1591
1592 --cctx_count;
1593 coro_destroy (&cctx->cctx);
1594
1595 coro_stack_free (&cctx->stack);
1596
1597 Safefree (cctx);
1598}
1599
1600/* wether this cctx should be destructed */
1601#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1602
1603static coro_cctx *
1604cctx_get (pTHX)
1605{
1606 while (ecb_expect_true (cctx_first))
1607 {
1608 coro_cctx *cctx = cctx_first;
1609 cctx_first = cctx->next;
1610 --cctx_idle;
1611
1612 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
1613 return cctx;
1614
1615 cctx_destroy (cctx);
1616 }
1617
1618 return cctx_new_run ();
1619}
1620
1621static void
1622cctx_put (coro_cctx *cctx)
1623{
1624 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1625
1626 /* free another cctx if overlimit */
1627 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1628 {
1629 coro_cctx *first = cctx_first;
1630 cctx_first = first->next;
1631 --cctx_idle;
1632
1633 cctx_destroy (first);
1634 }
1635
1636 ++cctx_idle;
1637 cctx->next = cctx_first;
1638 cctx_first = cctx;
1639}
1640
1641/** coroutine switching *****************************************************/
1642
1643static void
1644transfer_check (pTHX_ struct coro *prev, struct coro *next)
1645{
1646 /* TODO: throwing up here is considered harmful */
1647
1648 if (ecb_expect_true (prev != next))
1649 {
1650 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1651 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1652
1653 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1654 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1655
1656#if !PERL_VERSION_ATLEAST (5,10,0)
1657 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1658 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1659#endif
1660 }
1661}
1662
1663/* always use the TRANSFER macro */
1664static void ecb_noinline /* noinline so we have a fixed stackframe */
1665transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1666{
1667 dSTACKLEVEL;
1668
1669 /* sometimes transfer is only called to set idle_sp */
1670 if (ecb_expect_false (!prev))
1671 {
1672 cctx_current->idle_sp = STACKLEVEL;
1673 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1674 }
1675 else if (ecb_expect_true (prev != next))
1676 {
1677 coro_cctx *cctx_prev;
1678
1679 if (ecb_expect_false (prev->flags & CF_NEW))
1680 {
1681 /* create a new empty/source context */
1682 prev->flags &= ~CF_NEW;
1683 prev->flags |= CF_RUNNING;
1684 }
1685
1686 prev->flags &= ~CF_RUNNING;
1687 next->flags |= CF_RUNNING;
1688
1689 /* first get rid of the old state */
1690 save_perl (aTHX_ prev);
1691
1692 if (ecb_expect_false (next->flags & CF_NEW))
1693 {
1694 /* need to start coroutine */
1695 next->flags &= ~CF_NEW;
1696 /* setup coroutine call */
1697 init_perl (aTHX_ next);
1698 }
1699 else
1700 load_perl (aTHX_ next);
1701
1702 /* possibly untie and reuse the cctx */
1703 if (ecb_expect_true (
1704 cctx_current->idle_sp == STACKLEVEL
1705 && !(cctx_current->flags & CC_TRACE)
1706 && !force_cctx
1707 ))
1708 {
1709 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1710 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1711
1712 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1713 /* without this the next cctx_get might destroy the running cctx while still in use */
1714 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1715 if (ecb_expect_true (!next->cctx))
1716 next->cctx = cctx_get (aTHX);
1717
1718 cctx_put (cctx_current);
1719 }
1720 else
1721 prev->cctx = cctx_current;
1722
1723 ++next->usecount;
1724
1725 cctx_prev = cctx_current;
1726 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1727
1728 next->cctx = 0;
1729
1730 if (ecb_expect_false (cctx_prev != cctx_current))
1731 {
1732 cctx_prev->top_env = PL_top_env;
1733 PL_top_env = cctx_current->top_env;
1734 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1735 }
1736
1737 transfer_tail (aTHX);
1738 }
1739}
1740
1741#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1742#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1743
1744/** high level stuff ********************************************************/
1745
1746/* this function is actually Coro, not Coro::State, but we call it from here */
1747/* because it is convenient - but it hasn't been declared yet for that reason */
1748static void
1749coro_call_on_destroy (pTHX_ struct coro *coro);
1750
1751static void
1752coro_state_destroy (pTHX_ struct coro *coro)
1753{
1754 if (coro->flags & CF_ZOMBIE)
1755 return;
1756
1757 slf_destroy (aTHX_ coro);
1758
1759 coro->flags |= CF_ZOMBIE;
1760
1761 if (coro->flags & CF_READY)
1762 {
1763 /* reduce nready, as destroying a ready coro effectively unreadies it */
1764 /* alternative: look through all ready queues and remove the coro */
1765 --coro_nready;
1766 }
1767 else
1768 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1769
1770 if (coro->next) coro->next->prev = coro->prev;
1771 if (coro->prev) coro->prev->next = coro->next;
1772 if (coro == coro_first) coro_first = coro->next;
1773
1774 if (coro->mainstack
1775 && coro->mainstack != main_mainstack
1776 && coro->slot
1777 && !PL_dirty)
1778 destroy_perl (aTHX_ coro);
1779
1780 cctx_destroy (coro->cctx);
1781 SvREFCNT_dec (coro->startcv);
1782 SvREFCNT_dec (coro->args);
1783 SvREFCNT_dec (coro->swap_sv);
1784 SvREFCNT_dec (CORO_THROW);
1785
1786 coro_call_on_destroy (aTHX_ coro);
1787
1788 /* more destruction mayhem in coro_state_free */
1789}
1790
1791static int
1792coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1793{
1794 struct coro *coro = (struct coro *)mg->mg_ptr;
1795 mg->mg_ptr = 0;
1796
1797 coro_state_destroy (aTHX_ coro);
1798 SvREFCNT_dec (coro->on_destroy);
1799 SvREFCNT_dec (coro->status);
1800
1801 Safefree (coro);
1802
1803 return 0;
1804}
1805
1806static int ecb_cold
1807coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1808{
1809 /* called when perl clones the current process the slow way (windows process emulation) */
1810 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1811 mg->mg_ptr = 0;
1812 mg->mg_virtual = 0;
1813
1814 return 0;
1815}
1816
1817static MGVTBL coro_state_vtbl = {
1818 0, 0, 0, 0,
1819 coro_state_free,
1820 0,
1821#ifdef MGf_DUP
1822 coro_state_dup,
1823#else
1824# define MGf_DUP 0
1825#endif
1826};
1827
1828static void
1829prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1830{
1831 ta->prev = SvSTATE (prev_sv);
1832 ta->next = SvSTATE (next_sv);
1833 TRANSFER_CHECK (*ta);
1834}
1835
1836static void
1837api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1838{
1839 struct coro_transfer_args ta;
1840
1841 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1842 TRANSFER (ta, 1);
1843}
1844
1845/** Coro ********************************************************************/
1846
1847ecb_inline void
1848coro_enq (pTHX_ struct coro *coro)
1849{
1850 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1851
1852 SvREFCNT_inc_NN (coro->hv);
1853
1854 coro->next_ready = 0;
1855 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1856 ready [1] = coro;
1857}
1858
1859ecb_inline struct coro *
1860coro_deq (pTHX)
1861{
1862 int prio;
1863
1864 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1865 {
1866 struct coro **ready = coro_ready [prio];
1867
1868 if (ready [0])
1869 {
1870 struct coro *coro = ready [0];
1871 ready [0] = coro->next_ready;
1872 return coro;
1873 }
1874 }
1875
1876 return 0;
1877}
1878
1879static void
1880invoke_sv_ready_hook_helper (void)
1881{
548 dTHX; 1882 dTHX;
549 dSP; 1883 dSP;
550 UNOP myop;
551 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
552 1884
553 coro_init_stacks (); 1885 ENTER;
554 /*PL_curcop = 0;*/ 1886 SAVETMPS;
555 /*PL_in_eval = PL_in_eval;*/ /* inherit */
556 SvREFCNT_dec (GvAV (PL_defgv));
557 GvAV (PL_defgv) = coro->args; coro->args = 0;
558 1887
559 SPAGAIN;
560
561 Zero (&myop, 1, UNOP);
562 myop.op_next = Nullop;
563 myop.op_flags = OPf_WANT_VOID;
564
565 PL_op = (OP *)&myop;
566
567 PUSHMARK(SP); 1888 PUSHMARK (SP);
568 XPUSHs (sub_init);
569 PUTBACK; 1889 PUTBACK;
570 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1890 call_sv (coro_readyhook, G_VOID | G_DISCARD);
571 SPAGAIN;
572 1891
573 ENTER; /* necessary e.g. for dounwind */ 1892 FREETMPS;
1893 LEAVE;
574} 1894}
575 1895
576static void 1896static int
577free_coro_mortal () 1897api_ready (pTHX_ SV *coro_sv)
578{ 1898{
579 if (coro_mortal) 1899 struct coro *coro = SvSTATE (coro_sv);
580 {
581 SvREFCNT_dec (coro_mortal);
582 coro_mortal = 0;
583 }
584}
585 1900
586static void NOINLINE 1901 if (coro->flags & CF_READY)
587prepare_cctx (coro_stack *cctx)
588{
589 dSP;
590 UNOP myop;
591
592 Zero (&myop, 1, UNOP);
593 myop.op_next = PL_op;
594 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
595
596 PUSHMARK(SP);
597 EXTEND (SP, 2);
598 PUSHs (newSViv (PTR2IV (cctx)));
599 PUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
600 PUTBACK;
601 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
602 SPAGAIN;
603}
604
605static void
606coro_run (void *arg)
607{
608 /*
609 * this is a _very_ stripped down perl interpreter ;)
610 */
611 UNLOCK;
612
613 PL_top_env = &PL_start_env;
614 prepare_cctx ((coro_stack *)arg);
615
616 /* somebody will hit me for both perl_run and PL_restartop */
617 perl_run (PERL_GET_CONTEXT);
618
619 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
620 abort ();
621}
622
623static coro_stack *
624stack_new ()
625{
626 coro_stack *stack;
627
628 New (0, stack, 1, coro_stack);
629
630#if HAVE_MMAP
631
632 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
633 /* mmap suppsedly does allocate-on-write for us */
634 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
635
636 if (stack->sptr == (void *)-1)
637 {
638 perror ("FATAL: unable to mmap stack for coroutine");
639 _exit (EXIT_FAILURE);
640 }
641
642# if STACKGUARD
643 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
644# endif
645
646#else
647
648 stack->ssize = STACKSIZE * (long)sizeof (long);
649 New (0, stack->sptr, STACKSIZE, long);
650
651 if (!stack->sptr)
652 {
653 perror (stderr, "FATAL: unable to malloc stack for coroutine");
654 _exit (EXIT_FAILURE);
655 }
656
657#endif
658
659 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
660
661 return stack;
662}
663
664static void
665stack_free (coro_stack *stack)
666{
667 if (!stack)
668 return; 1902 return 0;
669 1903
670#if HAVE_MMAP 1904 coro->flags |= CF_READY;
671 munmap (stack->sptr, stack->ssize);
672#else
673 Safefree (stack->sptr);
674#endif
675 1905
676 Safefree (stack); 1906 coro_enq (aTHX_ coro);
677}
678 1907
679static coro_stack *stack_first; 1908 if (!coro_nready++)
1909 if (coroapi.readyhook)
1910 coroapi.readyhook ();
680 1911
681static coro_stack * 1912 return 1;
682stack_get () 1913}
683{
684 coro_stack *stack;
685 1914
686 if (stack_first) 1915static int
687 { 1916api_is_ready (pTHX_ SV *coro_sv)
688 stack = stack_first; 1917{
689 stack_first = stack->next; 1918 return !!(SvSTATE (coro_sv)->flags & CF_READY);
690 } 1919}
691 else 1920
1921/* expects to own a reference to next->hv */
1922ecb_inline void
1923prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1924{
1925 SV *prev_sv = SvRV (coro_current);
1926
1927 ta->prev = SvSTATE_hv (prev_sv);
1928 ta->next = next;
1929
1930 TRANSFER_CHECK (*ta);
1931
1932 SvRV_set (coro_current, (SV *)next->hv);
1933
1934 free_coro_mortal (aTHX);
1935 coro_mortal = prev_sv;
1936}
1937
1938static void
1939prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1940{
1941 for (;;)
692 { 1942 {
693 stack = stack_new (); 1943 struct coro *next = coro_deq (aTHX);
694 PL_op = PL_op->op_next;
695 }
696 1944
697 return stack; 1945 if (ecb_expect_true (next))
698}
699
700static void
701stack_put (coro_stack *stack)
702{
703 stack->next = stack_first;
704 stack_first = stack;
705}
706
707/* never call directly, always through the coro_state_transfer global variable */
708static void NOINLINE
709transfer (struct coro *prev, struct coro *next, int flags)
710{
711 dSTACKLEVEL;
712
713 /* sometimes transfer is only called to set idle_sp */
714 if (flags == TRANSFER_SET_STACKLEVEL)
715 ((coro_stack *)prev)->idle_sp = STACKLEVEL;
716 else if (prev != next)
717 {
718 coro_stack *prev__stack;
719
720 LOCK;
721
722 if (next->mainstack)
723 { 1946 {
724 /* coroutine already started */ 1947 /* cannot transfer to destroyed coros, skip and look for next */
725 SAVE (prev, flags); 1948 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
726 LOAD (next); 1949 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1950 else
1951 {
1952 next->flags &= ~CF_READY;
1953 --coro_nready;
1954
1955 prepare_schedule_to (aTHX_ ta, next);
1956 break;
1957 }
727 } 1958 }
728 else 1959 else
729 { 1960 {
730 /* need to start coroutine */ 1961 /* nothing to schedule: call the idle handler */
731 /* first get rid of the old state */ 1962 if (SvROK (sv_idle)
732 SAVE (prev, -1); 1963 && SvOBJECT (SvRV (sv_idle)))
733 /* setup coroutine call */ 1964 {
734 setup_coro (next); 1965 if (SvRV (sv_idle) == SvRV (coro_current))
735 /* need a stack */ 1966 {
736 next->stack = 0; 1967 require_pv ("Carp");
1968
1969 {
1970 dSP;
1971
1972 ENTER;
1973 SAVETMPS;
1974
1975 PUSHMARK (SP);
1976 XPUSHs (sv_2mortal (newSVpv ("FATAL: $Coro::idle blocked itself - did you try to block inside an event loop callback? Caught", 0)));
1977 PUTBACK;
1978 call_pv ("Carp::confess", G_VOID | G_DISCARD);
1979
1980 FREETMPS;
1981 LEAVE;
1982 }
1983 }
1984
1985 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1986 api_ready (aTHX_ SvRV (sv_idle));
1987 --coro_nready;
1988 }
1989 else
1990 {
1991 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1992 dSP;
1993
1994 ENTER;
1995 SAVETMPS;
1996
1997 PUSHMARK (SP);
1998 PUTBACK;
1999 call_sv (sv_idle, G_VOID | G_DISCARD);
2000
2001 FREETMPS;
2002 LEAVE;
2003 }
737 } 2004 }
2005 }
2006}
738 2007
739 if (!prev->stack) 2008ecb_inline void
740 /* create a new empty context */ 2009prepare_cede (pTHX_ struct coro_transfer_args *ta)
741 Newz (0, prev->stack, 1, coro_stack); 2010{
2011 api_ready (aTHX_ coro_current);
2012 prepare_schedule (aTHX_ ta);
2013}
742 2014
743 prev__stack = prev->stack; 2015ecb_inline void
2016prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
2017{
2018 SV *prev = SvRV (coro_current);
744 2019
745 /* possibly "free" the stack */ 2020 if (coro_nready)
746 if (prev__stack->idle_sp == STACKLEVEL) 2021 {
2022 prepare_schedule (aTHX_ ta);
2023 api_ready (aTHX_ prev);
2024 }
2025 else
2026 prepare_nop (aTHX_ ta);
2027}
2028
2029static void
2030api_schedule (pTHX)
2031{
2032 struct coro_transfer_args ta;
2033
2034 prepare_schedule (aTHX_ &ta);
2035 TRANSFER (ta, 1);
2036}
2037
2038static void
2039api_schedule_to (pTHX_ SV *coro_sv)
2040{
2041 struct coro_transfer_args ta;
2042 struct coro *next = SvSTATE (coro_sv);
2043
2044 SvREFCNT_inc_NN (coro_sv);
2045 prepare_schedule_to (aTHX_ &ta, next);
2046}
2047
2048static int
2049api_cede (pTHX)
2050{
2051 struct coro_transfer_args ta;
2052
2053 prepare_cede (aTHX_ &ta);
2054
2055 if (ecb_expect_true (ta.prev != ta.next))
2056 {
2057 TRANSFER (ta, 1);
2058 return 1;
2059 }
2060 else
2061 return 0;
2062}
2063
2064static int
2065api_cede_notself (pTHX)
2066{
2067 if (coro_nready)
2068 {
2069 struct coro_transfer_args ta;
2070
2071 prepare_cede_notself (aTHX_ &ta);
2072 TRANSFER (ta, 1);
2073 return 1;
2074 }
2075 else
2076 return 0;
2077}
2078
2079static void
2080api_trace (pTHX_ SV *coro_sv, int flags)
2081{
2082 struct coro *coro = SvSTATE (coro_sv);
2083
2084 if (coro->flags & CF_RUNNING)
2085 croak ("cannot enable tracing on a running coroutine, caught");
2086
2087 if (flags & CC_TRACE)
2088 {
2089 if (!coro->cctx)
2090 coro->cctx = cctx_new_run ();
2091 else if (!(coro->cctx->flags & CC_TRACE))
2092 croak ("cannot enable tracing on coroutine with custom stack, caught");
2093
2094 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2095 }
2096 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2097 {
2098 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2099
2100 if (coro->flags & CF_RUNNING)
2101 PL_runops = RUNOPS_DEFAULT;
2102 else
2103 coro->slot->runops = RUNOPS_DEFAULT;
2104 }
2105}
2106
2107static void
2108coro_push_av (pTHX_ AV *av, I32 gimme_v)
2109{
2110 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2111 {
2112 dSP;
2113
2114 if (gimme_v == G_SCALAR)
2115 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2116 else
747 { 2117 {
748 stack_put (prev__stack); 2118 int i;
749 prev->stack = 0; 2119 EXTEND (SP, AvFILLp (av) + 1);
2120
2121 for (i = 0; i <= AvFILLp (av); ++i)
2122 PUSHs (AvARRAY (av)[i]);
750 } 2123 }
751 2124
752 if (!next->stack) 2125 PUTBACK;
753 next->stack = stack_get (); 2126 }
2127}
754 2128
755 if (prev__stack != next->stack) 2129static void
2130coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2131{
2132 if (!coro->on_destroy)
2133 coro->on_destroy = newAV ();
2134
2135 av_push (coro->on_destroy, cb);
2136}
2137
2138static void
2139slf_destroy_join (pTHX_ struct CoroSLF *frame)
2140{
2141 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2142}
2143
2144static int
2145slf_check_join (pTHX_ struct CoroSLF *frame)
2146{
2147 struct coro *coro = (struct coro *)frame->data;
2148
2149 if (!coro->status)
2150 return 1;
2151
2152 frame->destroy = 0;
2153
2154 coro_push_av (aTHX_ coro->status, GIMME_V);
2155
2156 SvREFCNT_dec ((SV *)coro->hv);
2157
2158 return 0;
2159}
2160
2161static void
2162slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2163{
2164 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2165
2166 if (items > 1)
2167 croak ("join called with too many arguments");
2168
2169 if (coro->status)
2170 frame->prepare = prepare_nop;
2171 else
2172 {
2173 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2174 frame->prepare = prepare_schedule;
2175 }
2176
2177 frame->check = slf_check_join;
2178 frame->destroy = slf_destroy_join;
2179 frame->data = (void *)coro;
2180 SvREFCNT_inc (coro->hv);
2181}
2182
2183static void
2184coro_call_on_destroy (pTHX_ struct coro *coro)
2185{
2186 AV *od = coro->on_destroy;
2187
2188 if (!od)
2189 return;
2190
2191 coro->on_destroy = 0;
2192 sv_2mortal ((SV *)od);
2193
2194 while (AvFILLp (od) >= 0)
2195 {
2196 SV *cb = sv_2mortal (av_pop (od));
2197
2198 /* coro hv's (and only hv's at the moment) are supported as well */
2199 if (SvSTATEhv_p (aTHX_ cb))
2200 api_ready (aTHX_ cb);
2201 else
756 { 2202 {
757 prev__stack->top_env = PL_top_env; 2203 dSP; /* don't disturb outer sp */
758 PL_top_env = next->stack->top_env; 2204 PUSHMARK (SP);
759 coro_transfer (&prev__stack->cctx, &next->stack->cctx); 2205
2206 if (coro->status)
2207 {
2208 PUTBACK;
2209 coro_push_av (aTHX_ coro->status, G_ARRAY);
2210 SPAGAIN;
2211 }
2212
2213 PUTBACK;
2214 call_sv (cb, G_VOID | G_DISCARD);
760 } 2215 }
761
762 free_coro_mortal ();
763
764 UNLOCK;
765 }
766}
767
768struct transfer_args
769{
770 struct coro *prev, *next;
771 int flags;
772};
773
774#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
775
776static void
777coro_state_destroy (struct coro *coro)
778{
779 if (coro->refcnt--)
780 return;
781
782 if (coro->mainstack && coro->mainstack != main_mainstack)
783 { 2216 }
784 struct coro temp; 2217}
785 2218
786 SAVE ((&temp), TRANSFER_SAVE_ALL); 2219static void
787 LOAD (coro); 2220coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
788 2221{
789 destroy_stacks (); 2222 AV *av;
790 2223
791 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 2224 if (coro->status)
792
793 coro->mainstack = 0;
794 } 2225 {
2226 av = coro->status;
2227 av_clear (av);
2228 }
2229 else
2230 av = coro->status = newAV ();
795 2231
796 stack_free (coro->stack); 2232 /* items are actually not so common, so optimise for this case */
797 SvREFCNT_dec (coro->args); 2233 if (items)
798 Safefree (coro); 2234 {
2235 int i;
2236
2237 av_extend (av, items - 1);
2238
2239 for (i = 0; i < items; ++i)
2240 av_push (av, SvREFCNT_inc_NN (arg [i]));
2241 }
2242}
2243
2244static void
2245slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2246{
2247 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2248 api_ready (aTHX_ sv_manager);
2249
2250 frame->prepare = prepare_schedule;
2251 frame->check = slf_check_repeat;
2252
2253 /* as a minor optimisation, we could unwind all stacks here */
2254 /* but that puts extra pressure on pp_slf, and is not worth much */
2255 /*coro_unwind_stacks (aTHX);*/
2256}
2257
2258static void
2259slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2260{
2261 HV *coro_hv = (HV *)SvRV (coro_current);
2262
2263 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2264 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2265}
2266
2267static void
2268slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2269{
2270 HV *coro_hv;
2271 struct coro *coro;
2272
2273 if (items <= 0)
2274 croak ("Coro::cancel called without coro object,");
2275
2276 coro = SvSTATE (arg [0]);
2277 coro_hv = coro->hv;
2278
2279 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2280
2281 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2282 {
2283 /* coro currently busy cancelling something, so just notify it */
2284 coro->slf_frame.data = (void *)coro;
2285
2286 frame->prepare = prepare_nop;
2287 frame->check = slf_check_nop;
2288 }
2289 else if (coro_hv == (HV *)SvRV (coro_current))
2290 {
2291 /* cancelling the current coro is allowed, and equals terminate */
2292 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2293 }
2294 else
2295 {
2296 struct coro *self = SvSTATE_current;
2297
2298 if (!self)
2299 croak ("Coro::cancel called outside of thread content,");
2300
2301 /* otherwise we cancel directly, purely for speed reasons
2302 * unfortunately, this requires some magic trickery, as
2303 * somebody else could cancel us, so we have to fight the cancellation.
2304 * this is ugly, and hopefully fully worth the extra speed.
2305 * besides, I can't get the slow-but-safe version working...
2306 */
2307 slf_frame.data = 0;
2308 self->flags |= CF_NOCANCEL;
2309 coro_state_destroy (aTHX_ coro);
2310 self->flags &= ~CF_NOCANCEL;
2311
2312 if (slf_frame.data)
2313 {
2314 /* while we were busy we have been cancelled, so terminate */
2315 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2316 }
2317 else
2318 {
2319 frame->prepare = prepare_nop;
2320 frame->check = slf_check_nop;
2321 }
2322 }
799} 2323}
800 2324
801static int 2325static int
802coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 2326slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
803{ 2327{
804 struct coro *coro = (struct coro *)mg->mg_ptr; 2328 frame->prepare = 0;
805 mg->mg_ptr = 0; 2329 coro_unwind_stacks (aTHX);
806 2330
807 coro_state_destroy (coro); 2331 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
808 2332
809 return 0; 2333 return 1;
810} 2334}
811 2335
812static int 2336static int
813coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 2337safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
814{ 2338{
815 struct coro *coro = (struct coro *)mg->mg_ptr; 2339 if (coro->cctx)
2340 croak ("coro inside C callback, unable to cancel at this time, caught");
816 2341
817 ++coro->refcnt; 2342 if (coro->flags & CF_NEW)
2343 {
2344 coro_set_status (aTHX_ coro, arg, items);
2345 coro_state_destroy (aTHX_ coro);
2346 }
2347 else
2348 {
2349 if (!coro->slf_frame.prepare)
2350 croak ("coro outside an SLF function, unable to cancel at this time, caught");
818 2351
2352 slf_destroy (aTHX_ coro);
2353
2354 coro_set_status (aTHX_ coro, arg, items);
2355 coro->slf_frame.prepare = prepare_nop;
2356 coro->slf_frame.check = slf_check_safe_cancel;
2357
2358 api_ready (aTHX_ (SV *)coro->hv);
2359 }
2360
819 return 0; 2361 return 1;
820} 2362}
821 2363
822static MGVTBL coro_state_vtbl = {
823 0, 0, 0, 0,
824 coro_state_clear,
825 0,
826#ifdef MGf_DUP
827 coro_state_dup,
828#endif
829};
830
831static struct coro *
832SvSTATE (SV *coro)
833{
834 HV *stash;
835 MAGIC *mg;
836
837 if (SvROK (coro))
838 coro = SvRV (coro);
839
840 stash = SvSTASH (coro);
841 if (stash != coro_stash && stash != coro_state_stash)
842 {
843 /* very slow, but rare, check */
844 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
845 croak ("Coro::State object required");
846 }
847
848 mg = SvMAGIC (coro);
849 assert (mg->mg_type == PERL_MAGIC_ext);
850 return (struct coro *)mg->mg_ptr;
851}
852
853static void
854prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
855{
856 ta->prev = SvSTATE (prev);
857 ta->next = SvSTATE (next);
858 ta->flags = flags;
859}
860
861static void
862api_transfer (SV *prev, SV *next, int flags)
863{
864 dTHX;
865 struct transfer_args ta;
866
867 prepare_transfer (&ta, prev, next, flags);
868 TRANSFER (ta);
869}
870
871/** Coro ********************************************************************/ 2364/*****************************************************************************/
2365/* async pool handler */
872 2366
873#define PRIO_MAX 3
874#define PRIO_HIGH 1
875#define PRIO_NORMAL 0
876#define PRIO_LOW -1
877#define PRIO_IDLE -3
878#define PRIO_MIN -4
879
880/* for Coro.pm */
881static GV *coro_current, *coro_idle;
882static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
883static int coro_nready;
884
885static void 2367static int
886coro_enq (SV *sv) 2368slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
887{ 2369{
888 int prio; 2370 HV *hv = (HV *)SvRV (coro_current);
2371 struct coro *coro = (struct coro *)frame->data;
889 2372
890 if (SvTYPE (sv) != SVt_PVHV) 2373 if (!coro->invoke_cb)
891 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 2374 return 1; /* loop till we have invoke */
892 2375 else
893 prio = SvSTATE (sv)->prio;
894
895 av_push (coro_ready [prio - PRIO_MIN], sv);
896 coro_nready++;
897}
898
899static SV *
900coro_deq (int min_prio)
901{
902 int prio = PRIO_MAX - PRIO_MIN;
903
904 min_prio -= PRIO_MIN;
905 if (min_prio < 0)
906 min_prio = 0;
907
908 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
909 if (AvFILLp (coro_ready [prio]) >= 0)
910 { 2376 {
911 coro_nready--; 2377 hv_store (hv, "desc", sizeof ("desc") - 1,
912 return av_shift (coro_ready [prio]); 2378 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
913 }
914 2379
915 return 0; 2380 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
916}
917
918static void
919api_ready (SV *coro)
920{
921 dTHX;
922
923 if (SvROK (coro))
924 coro = SvRV (coro);
925
926 LOCK;
927 coro_enq (SvREFCNT_inc (coro));
928 UNLOCK;
929}
930
931static void
932prepare_schedule (struct transfer_args *ta)
933{
934 SV *current, *prev, *next;
935
936 current = GvSV (coro_current);
937
938 for (;;)
939 {
940 LOCK;
941 next = coro_deq (PRIO_MIN);
942 UNLOCK;
943
944 if (next)
945 break;
946 2381
947 { 2382 {
948 dSP; 2383 dSP;
949 2384 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
950 ENTER;
951 SAVETMPS;
952
953 PUSHMARK (SP);
954 PUTBACK; 2385 PUTBACK;
955 call_sv (GvSV (coro_idle), G_DISCARD);
956
957 FREETMPS;
958 LEAVE;
959 } 2386 }
2387
2388 SvREFCNT_dec (GvAV (PL_defgv));
2389 GvAV (PL_defgv) = coro->invoke_av;
2390 coro->invoke_av = 0;
2391
2392 return 0;
2393 }
2394}
2395
2396static void
2397slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2398{
2399 HV *hv = (HV *)SvRV (coro_current);
2400 struct coro *coro = SvSTATE_hv ((SV *)hv);
2401
2402 if (ecb_expect_true (coro->saved_deffh))
960 } 2403 {
2404 /* subsequent iteration */
2405 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2406 coro->saved_deffh = 0;
961 2407
962 prev = SvRV (current); 2408 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
963 SvRV (current) = next; 2409 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2410 {
2411 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2412 return;
2413 }
2414 else
2415 {
2416 av_clear (GvAV (PL_defgv));
2417 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
964 2418
965 /* free this only after the transfer */ 2419 coro->prio = 0;
966 LOCK;
967 free_coro_mortal ();
968 UNLOCK;
969 coro_mortal = prev;
970 2420
971 ta->prev = SvSTATE (prev); 2421 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
972 ta->next = SvSTATE (next); 2422 api_trace (aTHX_ coro_current, 0);
973 ta->flags = TRANSFER_SAVE_ALL;
974}
975 2423
2424 frame->prepare = prepare_schedule;
2425 av_push (av_async_pool, SvREFCNT_inc (hv));
2426 }
2427 }
2428 else
2429 {
2430 /* first iteration, simply fall through */
2431 frame->prepare = prepare_nop;
2432 }
2433
2434 frame->check = slf_check_pool_handler;
2435 frame->data = (void *)coro;
2436}
2437
2438/*****************************************************************************/
2439/* rouse callback */
2440
2441#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2442
2443static void
2444coro_rouse_callback (pTHX_ CV *cv)
2445{
2446 dXSARGS;
2447 SV *data = (SV *)S_GENSUB_ARG;
2448
2449 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2450 {
2451 /* first call, set args */
2452 SV *coro = SvRV (data);
2453 AV *av = newAV ();
2454
2455 SvRV_set (data, (SV *)av);
2456
2457 /* better take a full copy of the arguments */
2458 while (items--)
2459 av_store (av, items, newSVsv (ST (items)));
2460
2461 api_ready (aTHX_ coro);
2462 SvREFCNT_dec (coro);
2463 }
2464
2465 XSRETURN_EMPTY;
2466}
2467
976static void 2468static int
2469slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2470{
2471 SV *data = (SV *)frame->data;
2472
2473 if (CORO_THROW)
2474 return 0;
2475
2476 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2477 return 1;
2478
2479 /* now push all results on the stack */
2480 {
2481 dSP;
2482 AV *av = (AV *)SvRV (data);
2483 int i;
2484
2485 EXTEND (SP, AvFILLp (av) + 1);
2486 for (i = 0; i <= AvFILLp (av); ++i)
2487 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2488
2489 /* we have stolen the elements, so set length to zero and free */
2490 AvFILLp (av) = -1;
2491 av_undef (av);
2492
2493 PUTBACK;
2494 }
2495
2496 return 0;
2497}
2498
2499static void
2500slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2501{
2502 SV *cb;
2503
2504 if (items)
2505 cb = arg [0];
2506 else
2507 {
2508 struct coro *coro = SvSTATE_current;
2509
2510 if (!coro->rouse_cb)
2511 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2512
2513 cb = sv_2mortal (coro->rouse_cb);
2514 coro->rouse_cb = 0;
2515 }
2516
2517 if (!SvROK (cb)
2518 || SvTYPE (SvRV (cb)) != SVt_PVCV
2519 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2520 croak ("Coro::rouse_wait called with illegal callback argument,");
2521
2522 {
2523 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2524 SV *data = (SV *)S_GENSUB_ARG;
2525
2526 frame->data = (void *)data;
2527 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2528 frame->check = slf_check_rouse_wait;
2529 }
2530}
2531
2532static SV *
2533coro_new_rouse_cb (pTHX)
2534{
2535 HV *hv = (HV *)SvRV (coro_current);
2536 struct coro *coro = SvSTATE_hv (hv);
2537 SV *data = newRV_inc ((SV *)hv);
2538 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2539
2540 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2541 SvREFCNT_dec (data); /* magicext increases the refcount */
2542
2543 SvREFCNT_dec (coro->rouse_cb);
2544 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2545
2546 return cb;
2547}
2548
2549/*****************************************************************************/
2550/* schedule-like-function opcode (SLF) */
2551
2552static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2553static const CV *slf_cv;
2554static SV **slf_argv;
2555static int slf_argc, slf_arga; /* count, allocated */
2556static I32 slf_ax; /* top of stack, for restore */
2557
2558/* this restores the stack in the case we patched the entersub, to */
2559/* recreate the stack frame as perl will on following calls */
2560/* since entersub cleared the stack */
2561static OP *
2562pp_restore (pTHX)
2563{
2564 int i;
2565 SV **SP = PL_stack_base + slf_ax;
2566
2567 PUSHMARK (SP);
2568
2569 EXTEND (SP, slf_argc + 1);
2570
2571 for (i = 0; i < slf_argc; ++i)
2572 PUSHs (sv_2mortal (slf_argv [i]));
2573
2574 PUSHs ((SV *)CvGV (slf_cv));
2575
2576 RETURNOP (slf_restore.op_first);
2577}
2578
2579static void
2580slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2581{
2582 SV **arg = (SV **)slf_frame.data;
2583
2584 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2585}
2586
2587static void
2588slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2589{
2590 if (items != 2)
2591 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2592
2593 frame->prepare = slf_prepare_transfer;
2594 frame->check = slf_check_nop;
2595 frame->data = (void *)arg; /* let's hope it will stay valid */
2596}
2597
2598static void
2599slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2600{
2601 frame->prepare = prepare_schedule;
2602 frame->check = slf_check_nop;
2603}
2604
2605static void
977prepare_cede (struct transfer_args *ta) 2606slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
978{ 2607{
979 LOCK; 2608 struct coro *next = (struct coro *)slf_frame.data;
980 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
981 UNLOCK;
982 2609
2610 SvREFCNT_inc_NN (next->hv);
983 prepare_schedule (ta); 2611 prepare_schedule_to (aTHX_ ta, next);
984} 2612}
985 2613
986static void 2614static void
987api_schedule (void) 2615slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
988{ 2616{
989 dTHX; 2617 if (!items)
2618 croak ("Coro::schedule_to expects a coroutine argument, caught");
2619
2620 frame->data = (void *)SvSTATE (arg [0]);
2621 frame->prepare = slf_prepare_schedule_to;
2622 frame->check = slf_check_nop;
2623}
2624
2625static void
2626slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2627{
2628 api_ready (aTHX_ SvRV (coro_current));
2629
2630 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2631}
2632
2633static void
2634slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2635{
2636 frame->prepare = prepare_cede;
2637 frame->check = slf_check_nop;
2638}
2639
2640static void
2641slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2642{
2643 frame->prepare = prepare_cede_notself;
2644 frame->check = slf_check_nop;
2645}
2646
2647/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2648static void
2649slf_destroy (pTHX_ struct coro *coro)
2650{
2651 struct CoroSLF frame = coro->slf_frame;
2652
2653 /*
2654 * The on_destroy below most likely is from an SLF call.
2655 * Since by definition the SLF call will not finish when we destroy
2656 * the coro, we will have to force-finish it here, otherwise
2657 * cleanup functions cannot call SLF functions.
2658 */
2659 coro->slf_frame.prepare = 0;
2660
2661 /* this callback is reserved for slf functions needing to do cleanup */
2662 if (frame.destroy && frame.prepare && !PL_dirty)
2663 frame.destroy (aTHX_ &frame);
2664}
2665
2666/*
2667 * these not obviously related functions are all rolled into one
2668 * function to increase chances that they all will call transfer with the same
2669 * stack offset
2670 * SLF stands for "schedule-like-function".
2671 */
2672static OP *
2673pp_slf (pTHX)
2674{
2675 I32 checkmark; /* mark SP to see how many elements check has pushed */
2676
2677 /* set up the slf frame, unless it has already been set-up */
2678 /* the latter happens when a new coro has been started */
2679 /* or when a new cctx was attached to an existing coroutine */
2680 if (ecb_expect_true (!slf_frame.prepare))
2681 {
2682 /* first iteration */
2683 dSP;
2684 SV **arg = PL_stack_base + TOPMARK + 1;
2685 int items = SP - arg; /* args without function object */
2686 SV *gv = *sp;
2687
2688 /* do a quick consistency check on the "function" object, and if it isn't */
2689 /* for us, divert to the real entersub */
2690 if (SvTYPE (gv) != SVt_PVGV
2691 || !GvCV (gv)
2692 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2693 return PL_ppaddr[OP_ENTERSUB](aTHX);
2694
2695 if (!(PL_op->op_flags & OPf_STACKED))
2696 {
2697 /* ampersand-form of call, use @_ instead of stack */
2698 AV *av = GvAV (PL_defgv);
2699 arg = AvARRAY (av);
2700 items = AvFILLp (av) + 1;
2701 }
2702
2703 /* now call the init function, which needs to set up slf_frame */
2704 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2705 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2706
2707 /* pop args */
2708 SP = PL_stack_base + POPMARK;
2709
2710 PUTBACK;
2711 }
2712
2713 /* now that we have a slf_frame, interpret it! */
2714 /* we use a callback system not to make the code needlessly */
2715 /* complicated, but so we can run multiple perl coros from one cctx */
2716
2717 do
2718 {
990 struct transfer_args ta; 2719 struct coro_transfer_args ta;
991 2720
992 prepare_schedule (&ta); 2721 slf_frame.prepare (aTHX_ &ta);
993 TRANSFER (ta); 2722 TRANSFER (ta, 0);
994}
995 2723
2724 checkmark = PL_stack_sp - PL_stack_base;
2725 }
2726 while (slf_frame.check (aTHX_ &slf_frame));
2727
2728 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2729
2730 /* exception handling */
2731 if (ecb_expect_false (CORO_THROW))
2732 {
2733 SV *exception = sv_2mortal (CORO_THROW);
2734
2735 CORO_THROW = 0;
2736 sv_setsv (ERRSV, exception);
2737 croak (0);
2738 }
2739
2740 /* return value handling - mostly like entersub */
2741 /* make sure we put something on the stack in scalar context */
2742 if (GIMME_V == G_SCALAR
2743 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2744 {
2745 dSP;
2746 SV **bot = PL_stack_base + checkmark;
2747
2748 if (sp == bot) /* too few, push undef */
2749 bot [1] = &PL_sv_undef;
2750 else /* too many, take last one */
2751 bot [1] = *sp;
2752
2753 SP = bot + 1;
2754
2755 PUTBACK;
2756 }
2757
2758 return NORMAL;
2759}
2760
2761static void
2762api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2763{
2764 int i;
2765 SV **arg = PL_stack_base + ax;
2766 int items = PL_stack_sp - arg + 1;
2767
2768 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2769
2770 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2771 && PL_op->op_ppaddr != pp_slf)
2772 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2773
2774 CvFLAGS (cv) |= CVf_SLF;
2775 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2776 slf_cv = cv;
2777
2778 /* we patch the op, and then re-run the whole call */
2779 /* we have to put the same argument on the stack for this to work */
2780 /* and this will be done by pp_restore */
2781 slf_restore.op_next = (OP *)&slf_restore;
2782 slf_restore.op_type = OP_CUSTOM;
2783 slf_restore.op_ppaddr = pp_restore;
2784 slf_restore.op_first = PL_op;
2785
2786 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2787
2788 if (PL_op->op_flags & OPf_STACKED)
2789 {
2790 if (items > slf_arga)
2791 {
2792 slf_arga = items;
2793 Safefree (slf_argv);
2794 New (0, slf_argv, slf_arga, SV *);
2795 }
2796
2797 slf_argc = items;
2798
2799 for (i = 0; i < items; ++i)
2800 slf_argv [i] = SvREFCNT_inc (arg [i]);
2801 }
2802 else
2803 slf_argc = 0;
2804
2805 PL_op->op_ppaddr = pp_slf;
2806 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2807
2808 PL_op = (OP *)&slf_restore;
2809}
2810
2811/*****************************************************************************/
2812/* dynamic wind */
2813
2814static void
2815on_enterleave_call (pTHX_ SV *cb)
2816{
2817 dSP;
2818
2819 PUSHSTACK;
2820
2821 PUSHMARK (SP);
2822 PUTBACK;
2823 call_sv (cb, G_VOID | G_DISCARD);
2824 SPAGAIN;
2825
2826 POPSTACK;
2827}
2828
2829static SV *
2830coro_avp_pop_and_free (pTHX_ AV **avp)
2831{
2832 AV *av = *avp;
2833 SV *res = av_pop (av);
2834
2835 if (AvFILLp (av) < 0)
2836 {
2837 *avp = 0;
2838 SvREFCNT_dec (av);
2839 }
2840
2841 return res;
2842}
2843
2844static void
2845coro_pop_on_enter (pTHX_ void *coro)
2846{
2847 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2848 SvREFCNT_dec (cb);
2849}
2850
2851static void
2852coro_pop_on_leave (pTHX_ void *coro)
2853{
2854 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2855 on_enterleave_call (aTHX_ sv_2mortal (cb));
2856}
2857
2858static void
2859enterleave_hook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, void *arg)
2860{
2861 if (!hook)
2862 return;
2863
2864 if (!*avp)
2865 {
2866 *avp = newAV ();
2867 AvREAL_off (*avp);
2868 }
2869
2870 av_push (*avp, (SV *)hook);
2871 av_push (*avp, (SV *)arg);
2872}
2873
2874static void
2875enterleave_unhook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, int execute)
2876{
2877 AV *av = *avp;
2878 int i;
2879
2880 if (!av)
2881 return;
2882
2883 for (i = AvFILLp (av) - 1; i >= 0; i -= 2)
2884 if (AvARRAY (av)[i] == (SV *)hook)
2885 {
2886 if (execute)
2887 hook (aTHX_ (void *)AvARRAY (av)[i + 1]);
2888
2889 memmove (AvARRAY (av) + i, AvARRAY (av) + i + 2, AvFILLp (av) - i - 1);
2890 av_pop (av);
2891 av_pop (av);
2892 break;
2893 }
2894
2895 if (AvFILLp (av) >= 0)
2896 {
2897 *avp = 0;
2898 SvREFCNT_dec_NN (av);
2899 }
2900}
2901
2902static void
2903api_enterleave_hook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2904{
2905 struct coro *coro = SvSTATE (coro_sv);
2906
2907 if (SvSTATE_current == coro)
2908 if (enter)
2909 enter (aTHX_ enter_arg);
2910
2911 enterleave_hook_xs (aTHX_ coro, &coro->on_enter_xs, enter, enter_arg);
2912 enterleave_hook_xs (aTHX_ coro, &coro->on_leave_xs, leave, leave_arg);
2913}
2914
2915static void
2916api_enterleave_unhook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, coro_enterleave_hook leave)
2917{
2918 struct coro *coro = SvSTATE (coro_sv);
2919
2920 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2921 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, SvSTATE_current == coro);
2922}
2923
2924static void
2925savedestructor_unhook_enter (pTHX_ coro_enterleave_hook enter)
2926{
2927 struct coro *coro = SvSTATE_current;
2928
2929 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2930}
2931
2932static void
2933savedestructor_unhook_leave (pTHX_ coro_enterleave_hook leave)
2934{
2935 struct coro *coro = SvSTATE_current;
2936
2937 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, 1);
2938}
2939
2940static void
2941api_enterleave_scope_hook (pTHX_ coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2942{
2943 api_enterleave_hook (aTHX_ coro_current, enter, enter_arg, leave, leave_arg);
2944
2945 /* this ought to be much cheaper than malloc + a single destructor call */
2946 if (enter) SAVEDESTRUCTOR_X (savedestructor_unhook_enter, enter);
2947 if (leave) SAVEDESTRUCTOR_X (savedestructor_unhook_leave, leave);
2948}
2949
2950/*****************************************************************************/
2951/* PerlIO::cede */
2952
2953typedef struct
2954{
2955 PerlIOBuf base;
2956 NV next, every;
2957} PerlIOCede;
2958
2959static IV ecb_cold
2960PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2961{
2962 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2963
2964 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2965 self->next = nvtime () + self->every;
2966
2967 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2968}
2969
2970static SV * ecb_cold
2971PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2972{
2973 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2974
2975 return newSVnv (self->every);
2976}
2977
2978static IV
2979PerlIOCede_flush (pTHX_ PerlIO *f)
2980{
2981 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2982 double now = nvtime ();
2983
2984 if (now >= self->next)
2985 {
2986 api_cede (aTHX);
2987 self->next = now + self->every;
2988 }
2989
2990 return PerlIOBuf_flush (aTHX_ f);
2991}
2992
2993static PerlIO_funcs PerlIO_cede =
2994{
2995 sizeof(PerlIO_funcs),
2996 "cede",
2997 sizeof(PerlIOCede),
2998 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2999 PerlIOCede_pushed,
3000 PerlIOBuf_popped,
3001 PerlIOBuf_open,
3002 PerlIOBase_binmode,
3003 PerlIOCede_getarg,
3004 PerlIOBase_fileno,
3005 PerlIOBuf_dup,
3006 PerlIOBuf_read,
3007 PerlIOBuf_unread,
3008 PerlIOBuf_write,
3009 PerlIOBuf_seek,
3010 PerlIOBuf_tell,
3011 PerlIOBuf_close,
3012 PerlIOCede_flush,
3013 PerlIOBuf_fill,
3014 PerlIOBase_eof,
3015 PerlIOBase_error,
3016 PerlIOBase_clearerr,
3017 PerlIOBase_setlinebuf,
3018 PerlIOBuf_get_base,
3019 PerlIOBuf_bufsiz,
3020 PerlIOBuf_get_ptr,
3021 PerlIOBuf_get_cnt,
3022 PerlIOBuf_set_ptrcnt,
3023};
3024
3025/*****************************************************************************/
3026/* Coro::Semaphore & Coro::Signal */
3027
3028static SV *
3029coro_waitarray_new (pTHX_ int count)
3030{
3031 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
3032 AV *av = newAV ();
3033 SV **ary;
3034
3035 /* unfortunately, building manually saves memory */
3036 Newx (ary, 2, SV *);
3037 AvALLOC (av) = ary;
3038#if PERL_VERSION_ATLEAST (5,10,0)
3039 AvARRAY (av) = ary;
3040#else
3041 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
3042 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
3043 SvPVX ((SV *)av) = (char *)ary;
3044#endif
3045 AvMAX (av) = 1;
3046 AvFILLp (av) = 0;
3047 ary [0] = newSViv (count);
3048
3049 return newRV_noinc ((SV *)av);
3050}
3051
3052/* semaphore */
3053
3054static void
3055coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
3056{
3057 SV *count_sv = AvARRAY (av)[0];
3058 IV count = SvIVX (count_sv);
3059
3060 count += adjust;
3061 SvIVX (count_sv) = count;
3062
3063 /* now wake up as many waiters as are expected to lock */
3064 while (count > 0 && AvFILLp (av) > 0)
3065 {
3066 SV *cb;
3067
3068 /* swap first two elements so we can shift a waiter */
3069 AvARRAY (av)[0] = AvARRAY (av)[1];
3070 AvARRAY (av)[1] = count_sv;
3071 cb = av_shift (av);
3072
3073 if (SvOBJECT (cb))
3074 {
3075 api_ready (aTHX_ cb);
3076 --count;
3077 }
3078 else if (SvTYPE (cb) == SVt_PVCV)
3079 {
3080 dSP;
3081 PUSHMARK (SP);
3082 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3083 PUTBACK;
3084 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3085 }
3086
3087 SvREFCNT_dec_NN (cb);
3088 }
3089}
3090
3091static void
3092coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
3093{
3094 /* call $sem->adjust (0) to possibly wake up some other waiters */
3095 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
3096}
3097
996static void 3098static int
997api_cede (void) 3099slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
998{ 3100{
999 dTHX; 3101 AV *av = (AV *)frame->data;
1000 struct transfer_args ta; 3102 SV *count_sv = AvARRAY (av)[0];
3103 SV *coro_hv = SvRV (coro_current);
1001 3104
1002 prepare_cede (&ta); 3105 frame->destroy = 0;
1003 TRANSFER (ta);
1004}
1005 3106
3107 /* if we are about to throw, don't actually acquire the lock, just throw */
3108 if (ecb_expect_false (CORO_THROW))
3109 {
3110 /* we still might be responsible for the semaphore, so wake up others */
3111 coro_semaphore_adjust (aTHX_ av, 0);
3112
3113 return 0;
3114 }
3115 else if (SvIVX (count_sv) > 0)
3116 {
3117 if (acquire)
3118 SvIVX (count_sv) = SvIVX (count_sv) - 1;
3119 else
3120 coro_semaphore_adjust (aTHX_ av, 0);
3121
3122 return 0;
3123 }
3124 else
3125 {
3126 int i;
3127 /* if we were woken up but can't down, we look through the whole */
3128 /* waiters list and only add us if we aren't in there already */
3129 /* this avoids some degenerate memory usage cases */
3130 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
3131 if (AvARRAY (av)[i] == coro_hv)
3132 return 1;
3133
3134 av_push (av, SvREFCNT_inc (coro_hv));
3135 return 1;
3136 }
3137}
3138
3139static int
3140slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
3141{
3142 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
3143}
3144
3145static int
3146slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
3147{
3148 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3149}
3150
3151static void
3152slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3153{
3154 AV *av = (AV *)SvRV (arg [0]);
3155
3156 if (SvIVX (AvARRAY (av)[0]) > 0)
3157 {
3158 frame->data = (void *)av;
3159 frame->prepare = prepare_nop;
3160 }
3161 else
3162 {
3163 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3164
3165 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3166 frame->prepare = prepare_schedule;
3167 /* to avoid race conditions when a woken-up coro gets terminated */
3168 /* we arrange for a temporary on_destroy that calls adjust (0) */
3169 frame->destroy = coro_semaphore_destroy;
3170 }
3171}
3172
3173static void
3174slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3175{
3176 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3177 frame->check = slf_check_semaphore_down;
3178}
3179
3180static void
3181slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3182{
3183 if (items >= 2)
3184 {
3185 /* callback form */
3186 AV *av = (AV *)SvRV (arg [0]);
3187 SV *cb_cv = s_get_cv_croak (arg [1]);
3188
3189 av_push (av, SvREFCNT_inc_NN (cb_cv));
3190
3191 if (SvIVX (AvARRAY (av)[0]) > 0)
3192 coro_semaphore_adjust (aTHX_ av, 0);
3193
3194 frame->prepare = prepare_nop;
3195 frame->check = slf_check_nop;
3196 }
3197 else
3198 {
3199 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3200 frame->check = slf_check_semaphore_wait;
3201 }
3202}
3203
3204/* signal */
3205
3206static void
3207coro_signal_wake (pTHX_ AV *av, int count)
3208{
3209 SvIVX (AvARRAY (av)[0]) = 0;
3210
3211 /* now signal count waiters */
3212 while (count > 0 && AvFILLp (av) > 0)
3213 {
3214 SV *cb;
3215
3216 /* swap first two elements so we can shift a waiter */
3217 cb = AvARRAY (av)[0];
3218 AvARRAY (av)[0] = AvARRAY (av)[1];
3219 AvARRAY (av)[1] = cb;
3220
3221 cb = av_shift (av);
3222
3223 if (SvTYPE (cb) == SVt_PVCV)
3224 {
3225 dSP;
3226 PUSHMARK (SP);
3227 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3228 PUTBACK;
3229 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3230 }
3231 else
3232 {
3233 api_ready (aTHX_ cb);
3234 sv_setiv (cb, 0); /* signal waiter */
3235 }
3236
3237 SvREFCNT_dec_NN (cb);
3238
3239 --count;
3240 }
3241}
3242
3243static int
3244slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3245{
3246 /* if we are about to throw, also stop waiting */
3247 return SvROK ((SV *)frame->data) && !CORO_THROW;
3248}
3249
3250static void
3251slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3252{
3253 AV *av = (AV *)SvRV (arg [0]);
3254
3255 if (items >= 2)
3256 {
3257 SV *cb_cv = s_get_cv_croak (arg [1]);
3258 av_push (av, SvREFCNT_inc_NN (cb_cv));
3259
3260 if (SvIVX (AvARRAY (av)[0]))
3261 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3262
3263 frame->prepare = prepare_nop;
3264 frame->check = slf_check_nop;
3265 }
3266 else if (SvIVX (AvARRAY (av)[0]))
3267 {
3268 SvIVX (AvARRAY (av)[0]) = 0;
3269 frame->prepare = prepare_nop;
3270 frame->check = slf_check_nop;
3271 }
3272 else
3273 {
3274 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3275
3276 av_push (av, waiter);
3277
3278 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3279 frame->prepare = prepare_schedule;
3280 frame->check = slf_check_signal_wait;
3281 }
3282}
3283
3284/*****************************************************************************/
3285/* Coro::AIO */
3286
3287#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3288
3289/* helper storage struct */
3290struct io_state
3291{
3292 int errorno;
3293 I32 laststype; /* U16 in 5.10.0 */
3294 int laststatval;
3295 Stat_t statcache;
3296};
3297
3298static void
3299coro_aio_callback (pTHX_ CV *cv)
3300{
3301 dXSARGS;
3302 AV *state = (AV *)S_GENSUB_ARG;
3303 SV *coro = av_pop (state);
3304 SV *data_sv = newSV (sizeof (struct io_state));
3305
3306 av_extend (state, items - 1);
3307
3308 sv_upgrade (data_sv, SVt_PV);
3309 SvCUR_set (data_sv, sizeof (struct io_state));
3310 SvPOK_only (data_sv);
3311
3312 {
3313 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3314
3315 data->errorno = errno;
3316 data->laststype = PL_laststype;
3317 data->laststatval = PL_laststatval;
3318 data->statcache = PL_statcache;
3319 }
3320
3321 /* now build the result vector out of all the parameters and the data_sv */
3322 {
3323 int i;
3324
3325 for (i = 0; i < items; ++i)
3326 av_push (state, SvREFCNT_inc_NN (ST (i)));
3327 }
3328
3329 av_push (state, data_sv);
3330
3331 api_ready (aTHX_ coro);
3332 SvREFCNT_dec_NN (coro);
3333 SvREFCNT_dec_NN ((AV *)state);
3334}
3335
3336static int
3337slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3338{
3339 AV *state = (AV *)frame->data;
3340
3341 /* if we are about to throw, return early */
3342 /* this does not cancel the aio request, but at least */
3343 /* it quickly returns */
3344 if (CORO_THROW)
3345 return 0;
3346
3347 /* one element that is an RV? repeat! */
3348 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
3349 return 1;
3350
3351 /* restore status */
3352 {
3353 SV *data_sv = av_pop (state);
3354 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3355
3356 errno = data->errorno;
3357 PL_laststype = data->laststype;
3358 PL_laststatval = data->laststatval;
3359 PL_statcache = data->statcache;
3360
3361 SvREFCNT_dec_NN (data_sv);
3362 }
3363
3364 /* push result values */
3365 {
3366 dSP;
3367 int i;
3368
3369 EXTEND (SP, AvFILLp (state) + 1);
3370 for (i = 0; i <= AvFILLp (state); ++i)
3371 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3372
3373 PUTBACK;
3374 }
3375
3376 return 0;
3377}
3378
3379static void
3380slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3381{
3382 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3383 SV *coro_hv = SvRV (coro_current);
3384 struct coro *coro = SvSTATE_hv (coro_hv);
3385
3386 /* put our coroutine id on the state arg */
3387 av_push (state, SvREFCNT_inc_NN (coro_hv));
3388
3389 /* first see whether we have a non-zero priority and set it as AIO prio */
3390 if (coro->prio)
3391 {
3392 dSP;
3393
3394 static SV *prio_cv;
3395 static SV *prio_sv;
3396
3397 if (ecb_expect_false (!prio_cv))
3398 {
3399 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3400 prio_sv = newSViv (0);
3401 }
3402
3403 PUSHMARK (SP);
3404 sv_setiv (prio_sv, coro->prio);
3405 XPUSHs (prio_sv);
3406
3407 PUTBACK;
3408 call_sv (prio_cv, G_VOID | G_DISCARD);
3409 }
3410
3411 /* now call the original request */
3412 {
3413 dSP;
3414 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3415 int i;
3416
3417 PUSHMARK (SP);
3418
3419 /* first push all args to the stack */
3420 EXTEND (SP, items + 1);
3421
3422 for (i = 0; i < items; ++i)
3423 PUSHs (arg [i]);
3424
3425 /* now push the callback closure */
3426 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3427
3428 /* now call the AIO function - we assume our request is uncancelable */
3429 PUTBACK;
3430 call_sv ((SV *)req, G_VOID | G_DISCARD);
3431 }
3432
3433 /* now that the request is going, we loop till we have a result */
3434 frame->data = (void *)state;
3435 frame->prepare = prepare_schedule;
3436 frame->check = slf_check_aio_req;
3437}
3438
3439static void
3440coro_aio_req_xs (pTHX_ CV *cv)
3441{
3442 dXSARGS;
3443
3444 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3445
3446 XSRETURN_EMPTY;
3447}
3448
3449/*****************************************************************************/
3450
3451#if CORO_CLONE
3452# include "clone.c"
3453#endif
3454
3455/*****************************************************************************/
3456
3457static SV *
3458coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3459{
3460 SV *coro_sv;
3461 struct coro *coro;
3462 MAGIC *mg;
3463 HV *hv;
3464 SV *cb;
3465 int i;
3466
3467 if (argc > 0)
3468 {
3469 cb = s_get_cv_croak (argv [0]);
3470
3471 if (!is_coro)
3472 {
3473 if (CvISXSUB (cb))
3474 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3475
3476 if (!CvROOT (cb))
3477 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3478 }
3479 }
3480
3481 Newz (0, coro, 1, struct coro);
3482 coro->args = newAV ();
3483 coro->flags = CF_NEW;
3484
3485 if (coro_first) coro_first->prev = coro;
3486 coro->next = coro_first;
3487 coro_first = coro;
3488
3489 coro->hv = hv = newHV ();
3490 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3491 mg->mg_flags |= MGf_DUP;
3492 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3493
3494 if (argc > 0)
3495 {
3496 av_extend (coro->args, argc + is_coro - 1);
3497
3498 if (is_coro)
3499 {
3500 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3501 cb = (SV *)cv_coro_run;
3502 }
3503
3504 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3505
3506 for (i = 1; i < argc; i++)
3507 av_push (coro->args, newSVsv (argv [i]));
3508 }
3509
3510 return coro_sv;
3511}
3512
3513#ifndef __cplusplus
3514ecb_cold XS(boot_Coro__State);
3515#endif
3516
3517#if CORO_JIT
3518
3519static void ecb_noinline ecb_cold
3520pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3521{
3522 dSP;
3523 AV *av = newAV ();
3524
3525 av_store (av, 3, newSVuv (d));
3526 av_store (av, 2, newSVuv (c));
3527 av_store (av, 1, newSVuv (b));
3528 av_store (av, 0, newSVuv (a));
3529
3530 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3531
3532 PUTBACK;
3533}
3534
3535static void ecb_noinline ecb_cold
3536jit_init (pTHX)
3537{
3538 dSP;
3539 SV *load, *save;
3540 char *map_base;
3541 char *load_ptr, *save_ptr;
3542 STRLEN load_len, save_len, map_len;
3543 int count;
3544
3545 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3546
3547 PUSHMARK (SP);
3548 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3549 #include "state.h"
3550 count = call_pv ("Coro::State::_jit", G_ARRAY);
3551 SPAGAIN;
3552
3553 save = POPs; save_ptr = SvPVbyte (save, save_len);
3554 load = POPs; load_ptr = SvPVbyte (load, load_len);
3555
3556 map_len = load_len + save_len + 16;
3557
3558 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3559
3560 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3561
3562 load_perl_slots = (load_save_perl_slots_type)map_base;
3563 memcpy (map_base, load_ptr, load_len);
3564
3565 map_base += (load_len + 15) & ~15;
3566
3567 save_perl_slots = (load_save_perl_slots_type)map_base;
3568 memcpy (map_base, save_ptr, save_len);
3569
3570 /* we are good citizens and try to make the page read-only, so the evil evil */
3571 /* hackers might have it a bit more difficult */
3572 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3573
3574 PUTBACK;
3575 eval_pv ("undef &Coro::State::_jit", 1);
3576}
3577
3578#endif
3579
1006MODULE = Coro::State PACKAGE = Coro::State 3580MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1007 3581
1008PROTOTYPES: DISABLE 3582PROTOTYPES: DISABLE
1009 3583
1010BOOT: 3584BOOT:
1011{ 3585{
3586#define VARx(name,expr,type) if (sizeof (type) < sizeof (expr)) croak ("FATAL: Coro thread context slot '" # name "' too small for this version of perl.");
3587#include "state.h"
1012#ifdef USE_ITHREADS 3588#ifdef USE_ITHREADS
1013 MUTEX_INIT (&coro_mutex); 3589# if CORO_PTHREAD
3590 coro_thx = PERL_GET_CONTEXT;
1014#endif 3591# endif
1015 BOOT_PAGESIZE; 3592#endif
3593 /* perl defines these to check for existance first, but why it doesn't */
3594 /* just create them one at init time is not clear to me, except for */
3595 /* programs trying to delete them, but... */
3596 /* anyway, we declare this as invalid and make sure they are initialised here */
3597 DEFSV;
3598 ERRSV;
3599
3600 cctx_current = cctx_new_empty ();
3601
3602 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3603 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3604
3605 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3606 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3607 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3608
3609 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3610 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3611 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1016 3612
1017 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3613 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1018 3614
1019 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3615 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1020 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3616 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1021 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3617 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
3618 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1022 3619
1023 main_mainstack = PL_mainstack; 3620 main_mainstack = PL_mainstack;
3621 main_top_env = PL_top_env;
1024 3622
3623 while (main_top_env->je_prev)
3624 main_top_env = main_top_env->je_prev;
3625
3626 {
3627 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3628
3629 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3630 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3631
3632 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3633 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3634 }
3635
1025 coroapi.ver = CORO_API_VERSION; 3636 coroapi.ver = CORO_API_VERSION;
3637 coroapi.rev = CORO_API_REVISION;
3638
1026 coroapi.transfer = api_transfer; 3639 coroapi.transfer = api_transfer;
1027 3640
3641 coroapi.sv_state = SvSTATE_;
3642 coroapi.execute_slf = api_execute_slf;
3643 coroapi.prepare_nop = prepare_nop;
3644 coroapi.prepare_schedule = prepare_schedule;
3645 coroapi.prepare_cede = prepare_cede;
3646 coroapi.prepare_cede_notself = prepare_cede_notself;
3647
3648 time_init (aTHX);
3649
1028 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3650 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3651#if CORO_JIT
3652 PUTBACK;
3653 jit_init (aTHX);
3654 SPAGAIN;
3655#endif
1029} 3656}
1030 3657
1031SV * 3658SV *
1032new (char *klass, ...) 3659new (SV *klass, ...)
3660 ALIAS:
3661 Coro::new = 1
1033 CODE: 3662 CODE:
1034{ 3663 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1035 struct coro *coro; 3664 OUTPUT:
1036 HV *hv; 3665 RETVAL
1037 int i;
1038 3666
1039 Newz (0, coro, 1, struct coro); 3667void
1040 coro->args = newAV (); 3668transfer (...)
3669 PROTOTYPE: $$
3670 CODE:
3671 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1041 3672
3673SV *
3674clone (Coro::State coro)
3675 CODE:
3676{
3677#if CORO_CLONE
3678 struct coro *ncoro = coro_clone (aTHX_ coro);
3679 MAGIC *mg;
3680 /* TODO: too much duplication */
1042 hv = newHV (); 3681 ncoro->hv = newHV ();
1043 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 3682 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3683 mg->mg_flags |= MGf_DUP;
1044 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 3684 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3685#else
3686 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3687#endif
3688}
3689 OUTPUT:
3690 RETVAL
1045 3691
1046 for (i = 1; i < items; i++) 3692int
1047 av_push (coro->args, newSVsv (ST (i))); 3693cctx_stacksize (int new_stacksize = 0)
3694 PROTOTYPE: ;$
3695 CODE:
3696 RETVAL = cctx_stacksize;
3697 if (new_stacksize)
3698 {
3699 cctx_stacksize = new_stacksize;
3700 ++cctx_gen;
3701 }
3702 OUTPUT:
3703 RETVAL
1048 3704
1049 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 3705int
1050 /*coro->stack = 0;*/ 3706cctx_max_idle (int max_idle = 0)
3707 PROTOTYPE: ;$
3708 CODE:
3709 RETVAL = cctx_max_idle;
3710 if (max_idle > 1)
3711 cctx_max_idle = max_idle;
3712 OUTPUT:
3713 RETVAL
3714
3715int
3716cctx_count ()
3717 PROTOTYPE:
3718 CODE:
3719 RETVAL = cctx_count;
3720 OUTPUT:
3721 RETVAL
3722
3723int
3724cctx_idle ()
3725 PROTOTYPE:
3726 CODE:
3727 RETVAL = cctx_idle;
3728 OUTPUT:
3729 RETVAL
3730
3731void
3732list ()
3733 PROTOTYPE:
3734 PPCODE:
3735{
3736 struct coro *coro;
3737 for (coro = coro_first; coro; coro = coro->next)
3738 if (coro->hv)
3739 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3740}
3741
3742void
3743call (Coro::State coro, SV *coderef)
3744 ALIAS:
3745 eval = 1
3746 CODE:
3747{
3748 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3749 {
3750 struct coro *current = SvSTATE_current;
3751 struct CoroSLF slf_save;
3752
3753 if (current != coro)
3754 {
3755 PUTBACK;
3756 save_perl (aTHX_ current);
3757 load_perl (aTHX_ coro);
3758 /* the coro is most likely in an active SLF call.
3759 * while not strictly required (the code we execute is
3760 * not allowed to call any SLF functions), it's cleaner
3761 * to reinitialise the slf_frame and restore it later.
3762 * This might one day allow us to actually do SLF calls
3763 * from code executed here.
3764 */
3765 slf_save = slf_frame;
3766 slf_frame.prepare = 0;
3767 SPAGAIN;
3768 }
3769
3770 PUSHSTACK;
3771
3772 PUSHMARK (SP);
3773 PUTBACK;
3774
3775 if (ix)
3776 eval_sv (coderef, 0);
3777 else
3778 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3779
3780 POPSTACK;
3781 SPAGAIN;
3782
3783 if (current != coro)
3784 {
3785 PUTBACK;
3786 slf_frame = slf_save;
3787 save_perl (aTHX_ coro);
3788 load_perl (aTHX_ current);
3789 SPAGAIN;
3790 }
3791 }
3792}
3793
3794SV *
3795is_ready (Coro::State coro)
3796 PROTOTYPE: $
3797 ALIAS:
3798 is_ready = CF_READY
3799 is_running = CF_RUNNING
3800 is_new = CF_NEW
3801 is_destroyed = CF_ZOMBIE
3802 is_zombie = CF_ZOMBIE
3803 is_suspended = CF_SUSPENDED
3804 CODE:
3805 RETVAL = boolSV (coro->flags & ix);
3806 OUTPUT:
3807 RETVAL
3808
3809void
3810throw (SV *self, SV *exception = &PL_sv_undef)
3811 PROTOTYPE: $;$
3812 CODE:
3813{
3814 struct coro *coro = SvSTATE (self);
3815 struct coro *current = SvSTATE_current;
3816 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3817 SvREFCNT_dec (*exceptionp);
3818 SvGETMAGIC (exception);
3819 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3820
3821 api_ready (aTHX_ self);
3822}
3823
3824void
3825api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3826 PROTOTYPE: $;$
3827 C_ARGS: aTHX_ coro, flags
3828
3829SV *
3830has_cctx (Coro::State coro)
3831 PROTOTYPE: $
3832 CODE:
3833 /* maybe manage the running flag differently */
3834 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3835 OUTPUT:
3836 RETVAL
3837
3838int
3839is_traced (Coro::State coro)
3840 PROTOTYPE: $
3841 CODE:
3842 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3843 OUTPUT:
3844 RETVAL
3845
3846UV
3847rss (Coro::State coro)
3848 PROTOTYPE: $
3849 ALIAS:
3850 usecount = 1
3851 CODE:
3852 switch (ix)
3853 {
3854 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3855 case 1: RETVAL = coro->usecount; break;
3856 }
3857 OUTPUT:
3858 RETVAL
3859
3860void
3861force_cctx ()
3862 PROTOTYPE:
3863 CODE:
3864 cctx_current->idle_sp = 0;
3865
3866void
3867swap_defsv (Coro::State self)
3868 PROTOTYPE: $
3869 ALIAS:
3870 swap_defav = 1
3871 CODE:
3872 if (!self->slot)
3873 croak ("cannot swap state with coroutine that has no saved state,");
3874 else
3875 {
3876 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3877 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3878
3879 SV *tmp = *src; *src = *dst; *dst = tmp;
3880 }
3881
3882void
3883cancel (Coro::State self)
3884 CODE:
3885 coro_state_destroy (aTHX_ self);
3886
3887SV *
3888enable_times (int enabled = enable_times)
3889 CODE:
3890{
3891 RETVAL = boolSV (enable_times);
3892
3893 if (enabled != enable_times)
3894 {
3895 enable_times = enabled;
3896
3897 coro_times_update ();
3898 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3899 }
1051} 3900}
1052 OUTPUT: 3901 OUTPUT:
1053 RETVAL 3902 RETVAL
1054 3903
1055void 3904void
1056_set_stacklevel (...) 3905times (Coro::State self)
1057 ALIAS: 3906 PPCODE:
1058 Coro::State::transfer = 1
1059 Coro::schedule = 2
1060 Coro::cede = 3
1061 Coro::Cont::yield = 4
1062 CODE:
1063{ 3907{
1064 struct transfer_args ta; 3908 struct coro *current = SvSTATE (coro_current);
1065 3909
1066 switch (ix) 3910 if (ecb_expect_false (current == self))
1067 { 3911 {
1068 case 0: 3912 coro_times_update ();
1069 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0))); 3913 coro_times_add (SvSTATE (coro_current));
1070 ta.next = 0;
1071 ta.flags = TRANSFER_SET_STACKLEVEL;
1072 break;
1073
1074 case 1:
1075 if (items != 3)
1076 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1077
1078 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1079 break;
1080
1081 case 2:
1082 prepare_schedule (&ta);
1083 break;
1084
1085 case 3:
1086 prepare_cede (&ta);
1087 break;
1088
1089 case 4:
1090 {
1091 SV *yieldstack;
1092 SV *sv;
1093 AV *defav = GvAV (PL_defgv);
1094
1095 yieldstack = *hv_fetch (
1096 (HV *)SvRV (GvSV (coro_current)),
1097 "yieldstack", sizeof ("yieldstack") - 1,
1098 0
1099 );
1100
1101 /* set up @_ -- ugly */
1102 av_clear (defav);
1103 av_fill (defav, items - 1);
1104 while (items--)
1105 av_store (defav, items, SvREFCNT_inc (ST(items)));
1106
1107 sv = av_pop ((AV *)SvRV (yieldstack));
1108 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1109 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1110 ta.flags = 0;
1111 SvREFCNT_dec (sv);
1112 }
1113 break;
1114
1115 } 3914 }
1116 3915
1117 TRANSFER (ta); 3916 EXTEND (SP, 2);
3917 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3918 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3919
3920 if (ecb_expect_false (current == self))
3921 coro_times_sub (SvSTATE (coro_current));
1118} 3922}
1119 3923
1120void 3924void
1121_clone_state_from (SV *dst, SV *src) 3925swap_sv (Coro::State coro, SV *sv, SV *swapsv)
1122 CODE: 3926 CODE:
1123{ 3927{
1124 struct coro *coro_src = SvSTATE (src); 3928 struct coro *current = SvSTATE_current;
1125 3929
1126 sv_unmagic (SvRV (dst), PERL_MAGIC_ext); 3930 if (current == coro)
3931 SWAP_SVS (current);
1127 3932
1128 ++coro_src->refcnt; 3933 if (!coro->swap_sv)
1129 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP; 3934 coro->swap_sv = newAV ();
1130}
1131 3935
1132void 3936 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
1133_exit (code) 3937 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
1134 int code 3938
1135 PROTOTYPE: $ 3939 if (current == coro)
1136 CODE: 3940 SWAP_SVS (current);
1137 _exit (code); 3941}
3942
1138 3943
1139MODULE = Coro::State PACKAGE = Coro 3944MODULE = Coro::State PACKAGE = Coro
1140 3945
1141BOOT: 3946BOOT:
1142{ 3947{
1143 int i; 3948 if (SVt_LAST > 32)
3949 croak ("Coro internal error: SVt_LAST > 32, swap_sv might need adjustment");
1144 3950
3951 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3952 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3953 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3954 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3955 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3956 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3957 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3958 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3959
3960 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3961 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3962 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3963 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3964
1145 coro_stash = gv_stashpv ("Coro", TRUE); 3965 coro_stash = gv_stashpv ("Coro", TRUE);
1146 3966
1147 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3967 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1148 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3968 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1149 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3969 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1150 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3970 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1151 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3971 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1152 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3972 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1153
1154 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1155 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1156
1157 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1158 coro_ready[i] = newAV ();
1159 3973
1160 { 3974 {
1161 SV *sv = perl_get_sv("Coro::API", 1); 3975 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1162 3976
1163 coroapi.schedule = api_schedule; 3977 coroapi.schedule = api_schedule;
3978 coroapi.schedule_to = api_schedule_to;
1164 coroapi.cede = api_cede; 3979 coroapi.cede = api_cede;
3980 coroapi.cede_notself = api_cede_notself;
1165 coroapi.ready = api_ready; 3981 coroapi.ready = api_ready;
3982 coroapi.is_ready = api_is_ready;
1166 coroapi.nready = &coro_nready; 3983 coroapi.nready = coro_nready;
1167 coroapi.current = coro_current; 3984 coroapi.current = coro_current;
1168 3985
3986 coroapi.enterleave_hook = api_enterleave_hook;
3987 coroapi.enterleave_unhook = api_enterleave_unhook;
3988 coroapi.enterleave_scope_hook = api_enterleave_scope_hook;
3989
1169 GCoroAPI = &coroapi; 3990 /*GCoroAPI = &coroapi;*/
1170 sv_setiv (sv, (IV)&coroapi); 3991 sv_setiv (sv, (IV)&coroapi);
1171 SvREADONLY_on (sv); 3992 SvREADONLY_on (sv);
1172 } 3993 }
1173} 3994}
1174 3995
3996SV *
3997async (...)
3998 PROTOTYPE: &@
3999 CODE:
4000 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
4001 api_ready (aTHX_ RETVAL);
4002 OUTPUT:
4003 RETVAL
4004
4005void
4006_destroy (Coro::State coro)
4007 CODE:
4008 /* used by the manager thread */
4009 coro_state_destroy (aTHX_ coro);
4010
4011void
4012on_destroy (Coro::State coro, SV *cb)
4013 CODE:
4014 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
4015
4016void
4017join (...)
4018 CODE:
4019 CORO_EXECUTE_SLF_XS (slf_init_join);
4020
4021void
4022terminate (...)
4023 CODE:
4024 CORO_EXECUTE_SLF_XS (slf_init_terminate);
4025
4026void
4027cancel (...)
4028 CODE:
4029 CORO_EXECUTE_SLF_XS (slf_init_cancel);
4030
4031int
4032safe_cancel (Coro::State self, ...)
4033 C_ARGS: aTHX_ self, &ST (1), items - 1
4034
4035void
4036schedule (...)
4037 CODE:
4038 CORO_EXECUTE_SLF_XS (slf_init_schedule);
4039
4040void
4041schedule_to (...)
4042 CODE:
4043 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
4044
4045void
4046cede_to (...)
4047 CODE:
4048 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
4049
4050void
4051cede (...)
4052 CODE:
4053 CORO_EXECUTE_SLF_XS (slf_init_cede);
4054
4055void
4056cede_notself (...)
4057 CODE:
4058 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
4059
4060void
4061_set_current (SV *current)
4062 PROTOTYPE: $
4063 CODE:
4064 SvREFCNT_dec_NN (SvRV (coro_current));
4065 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
4066
4067void
4068_set_readyhook (SV *hook)
4069 PROTOTYPE: $
4070 CODE:
4071 SvREFCNT_dec (coro_readyhook);
4072 SvGETMAGIC (hook);
4073 if (SvOK (hook))
4074 {
4075 coro_readyhook = newSVsv (hook);
4076 CORO_READYHOOK = invoke_sv_ready_hook_helper;
4077 }
4078 else
4079 {
4080 coro_readyhook = 0;
4081 CORO_READYHOOK = 0;
4082 }
4083
1175int 4084int
1176prio (Coro::State coro, int newprio = 0) 4085prio (Coro::State coro, int newprio = 0)
4086 PROTOTYPE: $;$
1177 ALIAS: 4087 ALIAS:
1178 nice = 1 4088 nice = 1
1179 CODE: 4089 CODE:
1180{ 4090{
1181 RETVAL = coro->prio; 4091 RETVAL = coro->prio;
1182 4092
1183 if (items > 1) 4093 if (items > 1)
1184 { 4094 {
1185 if (ix) 4095 if (ix)
1186 newprio += coro->prio; 4096 newprio = coro->prio - newprio;
1187 4097
1188 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 4098 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1189 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 4099 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1190 4100
1191 coro->prio = newprio; 4101 coro->prio = newprio;
1192 } 4102 }
1193} 4103}
4104 OUTPUT:
4105 RETVAL
1194 4106
1195void 4107SV *
1196ready (SV *self) 4108ready (SV *self)
1197 PROTOTYPE: $ 4109 PROTOTYPE: $
1198 CODE: 4110 CODE:
1199 api_ready (self); 4111 RETVAL = boolSV (api_ready (aTHX_ self));
4112 OUTPUT:
4113 RETVAL
1200 4114
1201int 4115int
1202nready (...) 4116nready (...)
1203 PROTOTYPE: 4117 PROTOTYPE:
1204 CODE: 4118 CODE:
1205 RETVAL = coro_nready; 4119 RETVAL = coro_nready;
1206 OUTPUT: 4120 OUTPUT:
1207 RETVAL 4121 RETVAL
1208 4122
1209MODULE = Coro::State PACKAGE = Coro::AIO 4123void
4124suspend (Coro::State self)
4125 PROTOTYPE: $
4126 CODE:
4127 self->flags |= CF_SUSPENDED;
4128
4129void
4130resume (Coro::State self)
4131 PROTOTYPE: $
4132 CODE:
4133 self->flags &= ~CF_SUSPENDED;
4134
4135void
4136_pool_handler (...)
4137 CODE:
4138 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
4139
4140void
4141async_pool (SV *cv, ...)
4142 PROTOTYPE: &@
4143 PPCODE:
4144{
4145 HV *hv = (HV *)av_pop (av_async_pool);
4146 AV *av = newAV ();
4147 SV *cb = ST (0);
4148 int i;
4149
4150 av_extend (av, items - 2);
4151 for (i = 1; i < items; ++i)
4152 av_push (av, SvREFCNT_inc_NN (ST (i)));
4153
4154 if ((SV *)hv == &PL_sv_undef)
4155 {
4156 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
4157 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
4158 SvREFCNT_dec_NN (sv);
4159 }
4160
4161 {
4162 struct coro *coro = SvSTATE_hv (hv);
4163
4164 assert (!coro->invoke_cb);
4165 assert (!coro->invoke_av);
4166 coro->invoke_cb = SvREFCNT_inc (cb);
4167 coro->invoke_av = av;
4168 }
4169
4170 api_ready (aTHX_ (SV *)hv);
4171
4172 if (GIMME_V != G_VOID)
4173 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4174 else
4175 SvREFCNT_dec_NN (hv);
4176}
1210 4177
1211SV * 4178SV *
1212_get_state () 4179rouse_cb ()
4180 PROTOTYPE:
1213 CODE: 4181 CODE:
1214{ 4182 RETVAL = coro_new_rouse_cb (aTHX);
1215 struct {
1216 int errorno;
1217 int laststype;
1218 int laststatval;
1219 Stat_t statcache;
1220 } data;
1221
1222 data.errorno = errno;
1223 data.laststype = PL_laststype;
1224 data.laststatval = PL_laststatval;
1225 data.statcache = PL_statcache;
1226
1227 RETVAL = newSVpvn ((char *)&data, sizeof data);
1228}
1229 OUTPUT: 4183 OUTPUT:
1230 RETVAL 4184 RETVAL
1231 4185
1232void 4186void
1233_set_state (char *data_) 4187rouse_wait (...)
4188 PROTOTYPE: ;$
4189 PPCODE:
4190 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4191
4192void
4193on_enter (SV *block)
4194 ALIAS:
4195 on_leave = 1
1234 PROTOTYPE: $ 4196 PROTOTYPE: &
1235 CODE: 4197 CODE:
1236{ 4198{
1237 struct { 4199 struct coro *coro = SvSTATE_current;
4200 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
4201
4202 block = s_get_cv_croak (block);
4203
4204 if (!*avp)
4205 *avp = newAV ();
4206
4207 av_push (*avp, SvREFCNT_inc (block));
4208
4209 if (!ix)
4210 on_enterleave_call (aTHX_ block);
4211
4212 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4213 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4214 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4215}
4216
4217
4218MODULE = Coro::State PACKAGE = PerlIO::cede
4219
4220BOOT:
4221 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4222
4223
4224MODULE = Coro::State PACKAGE = Coro::Semaphore
4225
4226SV *
4227new (SV *klass, SV *count = 0)
4228 CODE:
4229{
4230 int semcnt = 1;
4231
4232 if (count)
4233 {
4234 SvGETMAGIC (count);
4235
4236 if (SvOK (count))
4237 semcnt = SvIV (count);
4238 }
4239
4240 RETVAL = sv_bless (
4241 coro_waitarray_new (aTHX_ semcnt),
4242 GvSTASH (CvGV (cv))
4243 );
4244}
4245 OUTPUT:
4246 RETVAL
4247
4248# helper for Coro::Channel and others
4249SV *
4250_alloc (int count)
4251 CODE:
4252 RETVAL = coro_waitarray_new (aTHX_ count);
4253 OUTPUT:
4254 RETVAL
4255
4256SV *
4257count (SV *self)
4258 CODE:
4259 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4260 OUTPUT:
4261 RETVAL
4262
4263void
4264up (SV *self, int adjust = 1)
4265 ALIAS:
4266 adjust = 1
4267 CODE:
4268 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4269
4270void
4271down (...)
4272 CODE:
4273 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4274
4275void
4276wait (...)
4277 CODE:
4278 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4279
4280void
4281try (SV *self)
4282 PPCODE:
4283{
4284 AV *av = (AV *)SvRV (self);
4285 SV *count_sv = AvARRAY (av)[0];
4286 IV count = SvIVX (count_sv);
4287
4288 if (count > 0)
4289 {
4290 --count;
4291 SvIVX (count_sv) = count;
4292 XSRETURN_YES;
4293 }
4294 else
4295 XSRETURN_NO;
4296}
4297
4298void
4299waiters (SV *self)
4300 PPCODE:
4301{
4302 AV *av = (AV *)SvRV (self);
4303 int wcount = AvFILLp (av) + 1 - 1;
4304
4305 if (GIMME_V == G_SCALAR)
4306 XPUSHs (sv_2mortal (newSViv (wcount)));
4307 else
4308 {
1238 int errorno; 4309 int i;
1239 int laststype; 4310 EXTEND (SP, wcount);
1240 int laststatval; 4311 for (i = 1; i <= wcount; ++i)
1241 Stat_t statcache; 4312 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1242 } *data = (void *)data_; 4313 }
1243
1244 errno = data->errorno;
1245 PL_laststype = data->laststype;
1246 PL_laststatval = data->laststatval;
1247 PL_statcache = data->statcache;
1248} 4314}
4315
4316MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4317
4318void
4319_may_delete (SV *sem, int count, unsigned int extra_refs)
4320 PPCODE:
4321{
4322 AV *av = (AV *)SvRV (sem);
4323
4324 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4325 && AvFILLp (av) == 0 /* no waiters, just count */
4326 && SvIV (AvARRAY (av)[0]) == count)
4327 XSRETURN_YES;
4328
4329 XSRETURN_NO;
4330}
4331
4332MODULE = Coro::State PACKAGE = Coro::Signal
4333
4334SV *
4335new (SV *klass)
4336 CODE:
4337 RETVAL = sv_bless (
4338 coro_waitarray_new (aTHX_ 0),
4339 GvSTASH (CvGV (cv))
4340 );
4341 OUTPUT:
4342 RETVAL
4343
4344void
4345wait (...)
4346 CODE:
4347 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4348
4349void
4350broadcast (SV *self)
4351 CODE:
4352{
4353 AV *av = (AV *)SvRV (self);
4354 coro_signal_wake (aTHX_ av, AvFILLp (av));
4355}
4356
4357void
4358send (SV *self)
4359 CODE:
4360{
4361 AV *av = (AV *)SvRV (self);
4362
4363 if (AvFILLp (av))
4364 coro_signal_wake (aTHX_ av, 1);
4365 else
4366 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4367}
4368
4369IV
4370awaited (SV *self)
4371 CODE:
4372 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4373 OUTPUT:
4374 RETVAL
4375
4376
4377MODULE = Coro::State PACKAGE = Coro::AnyEvent
4378
4379BOOT:
4380 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4381
4382void
4383_schedule (...)
4384 CODE:
4385{
4386 static int incede;
4387
4388 api_cede_notself (aTHX);
4389
4390 ++incede;
4391 while (coro_nready >= incede && api_cede (aTHX))
4392 ;
4393
4394 sv_setsv (sv_activity, &PL_sv_undef);
4395 if (coro_nready >= incede)
4396 {
4397 PUSHMARK (SP);
4398 PUTBACK;
4399 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4400 }
4401
4402 --incede;
4403}
4404
4405
4406MODULE = Coro::State PACKAGE = Coro::AIO
4407
4408void
4409_register (char *target, char *proto, SV *req)
4410 CODE:
4411{
4412 SV *req_cv = s_get_cv_croak (req);
4413 /* newXSproto doesn't return the CV on 5.8 */
4414 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4415 sv_setpv ((SV *)slf_cv, proto);
4416 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4417}
4418
4419MODULE = Coro::State PACKAGE = Coro::Select
4420
4421void
4422patch_pp_sselect ()
4423 CODE:
4424 if (!coro_old_pp_sselect)
4425 {
4426 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4427 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4428 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4429 }
4430
4431void
4432unpatch_pp_sselect ()
4433 CODE:
4434 if (coro_old_pp_sselect)
4435 {
4436 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4437 coro_old_pp_sselect = 0;
4438 }
4439
4440MODULE = Coro::State PACKAGE = Coro::Util
4441
4442void
4443_exit (int code)
4444 CODE:
4445 _exit (code);
4446
4447NV
4448time ()
4449 CODE:
4450 RETVAL = nvtime (aTHX);
4451 OUTPUT:
4452 RETVAL
4453
4454NV
4455gettimeofday ()
4456 PPCODE:
4457{
4458 UV tv [2];
4459 u2time (aTHX_ tv);
4460 EXTEND (SP, 2);
4461 PUSHs (sv_2mortal (newSVuv (tv [0])));
4462 PUSHs (sv_2mortal (newSVuv (tv [1])));
4463}
4464

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