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Comparing Coro/Coro/State.xs (file contents):
Revision 1.145 by root, Mon Mar 12 21:40:14 2007 UTC vs.
Revision 1.416 by root, Mon Dec 12 15:19:56 2011 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1
5
1#include "libcoro/coro.c" 6#include "libcoro/coro.c"
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"
17#include "ecb.h"
8 18
19#include <stddef.h>
9#include <stdio.h> 20#include <stdio.h>
10#include <errno.h> 21#include <errno.h>
11#include <assert.h> 22#include <assert.h>
12 23
24#ifndef SVs_PADSTALE
25# define SVs_PADSTALE 0
26#endif
27
28#if defined(_WIN32)
29# undef HAS_GETTIMEOFDAY
30# undef setjmp
31# undef longjmp
32# undef _exit
33# define setjmp _setjmp /* deep magic */
34#else
35# include <inttypes.h> /* most portable stdint.h */
36#endif
37
13#ifdef HAVE_MMAP 38#if HAVE_MMAP
14# include <unistd.h> 39# include <unistd.h>
15# include <sys/mman.h> 40# include <sys/mman.h>
16# ifndef MAP_ANONYMOUS 41# ifndef MAP_ANONYMOUS
17# ifdef MAP_ANON 42# ifdef MAP_ANON
18# define MAP_ANONYMOUS MAP_ANON 43# define MAP_ANONYMOUS MAP_ANON
… …
33# define BOOT_PAGESIZE (void)0 58# define BOOT_PAGESIZE (void)0
34#endif 59#endif
35 60
36#if CORO_USE_VALGRIND 61#if CORO_USE_VALGRIND
37# include <valgrind/valgrind.h> 62# include <valgrind/valgrind.h>
38# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
39#else
40# define REGISTER_STACK(cctx,start,end)
41#endif 63#endif
42 64
43/* the maximum number of idle cctx that will be pooled */ 65/* the maximum number of idle cctx that will be pooled */
44#define MAX_IDLE_CCTX 8 66static int cctx_max_idle = 4;
45 67
46#define PERL_VERSION_ATLEAST(a,b,c) \ 68#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
47 (PERL_REVISION > (a) \ 69# define HAS_SCOPESTACK_NAME 1
48 || (PERL_REVISION == (a) \
49 && (PERL_VERSION > (b) \
50 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
51
52#if !PERL_VERSION_ATLEAST (5,6,0)
53# ifndef PL_ppaddr
54# define PL_ppaddr ppaddr
55# endif
56# ifndef call_sv
57# define call_sv perl_call_sv
58# endif
59# ifndef get_sv
60# define get_sv perl_get_sv
61# endif
62# ifndef get_cv
63# define get_cv perl_get_cv
64# endif
65# ifndef IS_PADGV
66# define IS_PADGV(v) 0
67# endif
68# ifndef IS_PADCONST
69# define IS_PADCONST(v) 0
70# endif
71#endif
72
73/* 5.8.7 */
74#ifndef SvRV_set
75# define SvRV_set(s,v) SvRV(s) = (v)
76#endif 70#endif
77 71
78#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 72#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
79# undef CORO_STACKGUARD 73# undef CORO_STACKGUARD
80#endif 74#endif
… …
86/* prefer perl internal functions over our own? */ 80/* prefer perl internal functions over our own? */
87#ifndef CORO_PREFER_PERL_FUNCTIONS 81#ifndef CORO_PREFER_PERL_FUNCTIONS
88# define CORO_PREFER_PERL_FUNCTIONS 0 82# define CORO_PREFER_PERL_FUNCTIONS 0
89#endif 83#endif
90 84
91/* The next macro should declare a variable stacklevel that contains and approximation 85/* The next macros try to return the current stack pointer, in an as
92 * to the current C stack pointer. Its property is that it changes with each call 86 * portable way as possible. */
93 * and should be unique. */
94#define dSTACKLEVEL int stacklevel
95#define STACKLEVEL ((void *)&stacklevel)
96
97#define IN_DESTRUCT (PL_main_cv == Nullcv)
98
99#if __GNUC__ >= 3 87#if __GNUC__ >= 4
100# define attribute(x) __attribute__(x) 88# define dSTACKLEVEL int stacklevel_dummy
101# define BARRIER __asm__ __volatile__ ("" : : : "memory") 89# define STACKLEVEL __builtin_frame_address (0)
102#else 90#else
103# define attribute(x) 91# define dSTACKLEVEL volatile void *stacklevel
104# define BARRIER 92# define STACKLEVEL ((void *)&stacklevel)
105#endif 93#endif
106 94
107#define NOINLINE attribute ((noinline)) 95#define IN_DESTRUCT PL_dirty
108 96
109#include "CoroAPI.h" 97#include "CoroAPI.h"
98#define GCoroAPI (&coroapi) /* very sneaky */
110 99
111#ifdef USE_ITHREADS 100#ifdef USE_ITHREADS
112static perl_mutex coro_mutex; 101# if CORO_PTHREAD
113# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 102static void *coro_thx;
114# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
115#else
116# define LOCK (void)0
117# define UNLOCK (void)0
118#endif 103# endif
104#endif
119 105
120/* helper storage struct for Coro::AIO */ 106/* used in state.h */
121struct io_state 107#define VAR(name,type) VARx(name, PL_ ## name, type)
122{
123 int errorno;
124 I32 laststype;
125 int laststatval;
126 Stat_t statcache;
127};
128 108
109#ifdef __linux
110# include <time.h> /* for timespec */
111# include <syscall.h> /* for SYS_* */
112# ifdef SYS_clock_gettime
113# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
114# define CORO_CLOCK_MONOTONIC 1
115# define CORO_CLOCK_THREAD_CPUTIME_ID 3
116# endif
117#endif
118
119static double (*nvtime)(); /* so why doesn't it take void? */
120static void (*u2time)(pTHX_ UV ret[2]);
121
122/* we hijack an hopefully unused CV flag for our purposes */
123#define CVf_SLF 0x4000
124static OP *pp_slf (pTHX);
125static void slf_destroy (pTHX_ struct coro *coro);
126
127static U32 cctx_gen;
129static size_t coro_stacksize = CORO_STACKSIZE; 128static size_t cctx_stacksize = CORO_STACKSIZE;
130static struct CoroAPI coroapi; 129static struct CoroAPI coroapi;
131static AV *main_mainstack; /* used to differentiate between $main and others */ 130static AV *main_mainstack; /* used to differentiate between $main and others */
131static JMPENV *main_top_env;
132static HV *coro_state_stash, *coro_stash; 132static HV *coro_state_stash, *coro_stash;
133static SV *coro_mortal; /* will be freed after next transfer */ 133static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
134
135static AV *av_destroy; /* destruction queue */
136static SV *sv_manager; /* the manager coro */
137static SV *sv_idle; /* $Coro::idle */
138
139static GV *irsgv; /* $/ */
140static GV *stdoutgv; /* *STDOUT */
141static SV *rv_diehook;
142static SV *rv_warnhook;
143static HV *hv_sig; /* %SIG */
144
145/* async_pool helper stuff */
146static SV *sv_pool_rss;
147static SV *sv_pool_size;
148static SV *sv_async_pool_idle; /* description string */
149static AV *av_async_pool; /* idle pool */
150static SV *sv_Coro; /* class string */
151static CV *cv_pool_handler;
152
153/* Coro::AnyEvent */
154static SV *sv_activity;
155
156/* enable processtime/realtime profiling */
157static char enable_times;
158typedef U32 coro_ts[2];
159static coro_ts time_real, time_cpu;
160static char times_valid;
134 161
135static struct coro_cctx *cctx_first; 162static struct coro_cctx *cctx_first;
136static int cctx_count, cctx_idle; 163static int cctx_count, cctx_idle;
137 164
165enum
166{
167 CC_MAPPED = 0x01,
168 CC_NOREUSE = 0x02, /* throw this away after tracing */
169 CC_TRACE = 0x04,
170 CC_TRACE_SUB = 0x08, /* trace sub calls */
171 CC_TRACE_LINE = 0x10, /* trace each statement */
172 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
173};
174
138/* this is a structure representing a c-level coroutine */ 175/* this is a structure representing a c-level coroutine */
139typedef struct coro_cctx { 176typedef struct coro_cctx
177{
140 struct coro_cctx *next; 178 struct coro_cctx *next;
141 179
142 /* the stack */ 180 /* the stack */
143 void *sptr; 181 void *sptr;
144 size_t ssize; 182 size_t ssize;
145 183
146 /* cpu state */ 184 /* cpu state */
147 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 185 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
186#ifndef NDEBUG
148 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 187 JMPENV *idle_te; /* same as idle_sp, but for top_env */
188#endif
149 JMPENV *top_env; 189 JMPENV *top_env;
150 coro_context cctx; 190 coro_context cctx;
151 191
192 U32 gen;
152#if CORO_USE_VALGRIND 193#if CORO_USE_VALGRIND
153 int valgrind_id; 194 int valgrind_id;
154#endif 195#endif
155 char inuse, mapped; 196 unsigned char flags;
156} coro_cctx; 197} coro_cctx;
157 198
199static coro_cctx *cctx_current; /* the currently running cctx */
200
201/*****************************************************************************/
202
203static MGVTBL coro_state_vtbl;
204
158enum { 205enum
206{
159 CF_RUNNING = 0x0001, /* coroutine is running */ 207 CF_RUNNING = 0x0001, /* coroutine is running */
160 CF_READY = 0x0002, /* coroutine is ready */ 208 CF_READY = 0x0002, /* coroutine is ready */
161 CF_NEW = 0x0004, /* has never been switched to */ 209 CF_NEW = 0x0004, /* has never been switched to */
162 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 210 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
211 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
212 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
163}; 213};
164 214
215/* the structure where most of the perl state is stored, overlaid on the cxstack */
216typedef struct
217{
218#define VARx(name,expr,type) type name;
219# include "state.h"
220#undef VARx
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))
225
165/* this is a structure representing a perl-level coroutine */ 226/* this is a structure representing a perl-level coroutine */
166struct coro { 227struct coro
228{
167 /* the c coroutine allocated to this perl coroutine, if any */ 229 /* the C coroutine allocated to this perl coroutine, if any */
168 coro_cctx *cctx; 230 coro_cctx *cctx;
169 231
232 /* ready queue */
233 struct coro *next_ready;
234
235 /* state data */
236 struct CoroSLF slf_frame; /* saved slf frame */
237 AV *mainstack;
238 perl_slots *slot; /* basically the saved sp */
239
240 CV *startcv; /* the CV to execute */
170 /* data associated with this coroutine (initial args) */ 241 AV *args; /* data associated with this coroutine (initial args) */
171 AV *args;
172 int refcnt;
173 int save; /* CORO_SAVE flags */
174 int flags; /* CF_ flags */ 242 int flags; /* CF_ flags */
243 HV *hv; /* the perl hash associated with this coro, if any */
175 244
176 /* optionally saved, might be zero */ 245 /* statistics */
177 AV *defav; /* @_ */ 246 int usecount; /* number of transfers to this coro */
178 SV *defsv; /* $_ */
179 SV *errsv; /* $@ */
180 SV *irssv; /* $/ */
181 SV *irssv_sv; /* real $/ cache */
182
183#define VAR(name,type) type name;
184# include "state.h"
185#undef VAR
186 247
187 /* coro process data */ 248 /* coro process data */
188 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;
262 AV *on_leave;
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;
189}; 272};
190 273
191typedef struct coro *Coro__State; 274typedef struct coro *Coro__State;
192typedef struct coro *Coro__State_or_hashref; 275typedef struct coro *Coro__State_or_hashref;
193 276
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
194/** Coro ********************************************************************/ 282/** Coro ********************************************************************/
195 283
196#define PRIO_MAX 3 284#define CORO_PRIO_MAX 3
197#define PRIO_HIGH 1 285#define CORO_PRIO_HIGH 1
198#define PRIO_NORMAL 0 286#define CORO_PRIO_NORMAL 0
199#define PRIO_LOW -1 287#define CORO_PRIO_LOW -1
200#define PRIO_IDLE -3 288#define CORO_PRIO_IDLE -3
201#define PRIO_MIN -4 289#define CORO_PRIO_MIN -4
202 290
203/* for Coro.pm */ 291/* for Coro.pm */
204static SV *coro_current; 292static SV *coro_current;
205static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 293static SV *coro_readyhook;
206static int coro_nready; 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 HAVE_MMAP though */
303 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
304 #ifndef CORO_JIT_TYPE
305 #if __x86_64 && 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) || !HAVE_MMAP
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... */
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
207 393
208/** lowlevel stuff **********************************************************/ 394/** lowlevel stuff **********************************************************/
209 395
210static AV * 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)
509{
510 MAGIC *mg;
511
512 if (SvROK (coro))
513 coro = SvRV (coro);
514
515 mg = SvSTATEhv_p (aTHX_ coro);
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 AV *
211coro_clone_padlist (CV *cv) 532coro_derive_padlist (pTHX_ CV *cv)
212{ 533{
213 AV *padlist = CvPADLIST (cv); 534 AV *padlist = CvPADLIST (cv);
214 AV *newpadlist, *newpad; 535 AV *newpadlist, *newpad;
215 536
216 newpadlist = newAV (); 537 newpadlist = newAV ();
217 AvREAL_off (newpadlist); 538 AvREAL_off (newpadlist);
218#if PERL_VERSION_ATLEAST (5,9,0) 539#if PERL_VERSION_ATLEAST (5,10,0)
219 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 540 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
220#else 541#else
221 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 542 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
222#endif 543#endif
223 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 544 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
224 --AvFILLp (padlist); 545 --AvFILLp (padlist);
225 546
226 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 547 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
227 av_store (newpadlist, 1, (SV *)newpad); 548 av_store (newpadlist, 1, (SV *)newpad);
228 549
229 return newpadlist; 550 return newpadlist;
230} 551}
231 552
232static void 553ecb_inline void
233free_padlist (AV *padlist) 554free_padlist (pTHX_ AV *padlist)
234{ 555{
235 /* may be during global destruction */ 556 /* may be during global destruction */
236 if (SvREFCNT (padlist)) 557 if (!IN_DESTRUCT)
237 { 558 {
238 I32 i = AvFILLp (padlist); 559 I32 i = AvFILLp (padlist);
239 while (i >= 0) 560
561 while (i > 0) /* special-case index 0 */
240 { 562 {
241 SV **svp = av_fetch (padlist, i--, FALSE); 563 /* we try to be extra-careful here */
242 if (svp) 564 AV *av = (AV *)AvARRAY (padlist)[i--];
243 { 565 I32 j = AvFILLp (av);
244 SV *sv; 566
245 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 567 while (j >= 0)
568 SvREFCNT_dec (AvARRAY (av)[j--]);
569
570 AvFILLp (av) = -1;
246 SvREFCNT_dec (sv); 571 SvREFCNT_dec (av);
247
248 SvREFCNT_dec (*svp);
249 }
250 } 572 }
251 573
574 SvREFCNT_dec (AvARRAY (padlist)[0]);
575
576 AvFILLp (padlist) = -1;
252 SvREFCNT_dec ((SV*)padlist); 577 SvREFCNT_dec ((SV*)padlist);
253 } 578 }
254} 579}
255 580
256static int 581static int
257coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 582coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
258{ 583{
259 AV *padlist; 584 AV *padlist;
260 AV *av = (AV *)mg->mg_obj; 585 AV *av = (AV *)mg->mg_obj;
261 586
587 /* perl manages to free our internal AV and _then_ call us */
588 if (IN_DESTRUCT)
589 return 0;
590
262 /* casting is fun. */ 591 /* casting is fun. */
263 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 592 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
264 free_padlist (padlist); 593 free_padlist (aTHX_ padlist);
265 594
266 SvREFCNT_dec (av); 595 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
267 596
268 return 0; 597 return 0;
269} 598}
270 599
271#define PERL_MAGIC_coro PERL_MAGIC_ext 600static MGVTBL coro_cv_vtbl = {
272 601 0, 0, 0, 0,
273static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 602 coro_cv_free
274 603};
275#define CORO_MAGIC(cv) \
276 SvMAGIC (cv) \
277 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
278 ? SvMAGIC (cv) \
279 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
280 : 0
281 604
282/* the next two functions merely cache the padlists */ 605/* the next two functions merely cache the padlists */
283static void 606ecb_inline void
284get_padlist (CV *cv) 607get_padlist (pTHX_ CV *cv)
285{ 608{
286 MAGIC *mg = CORO_MAGIC (cv); 609 MAGIC *mg = CORO_MAGIC_cv (cv);
287 AV *av; 610 AV *av;
288 611
289 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 612 if (ecb_expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
290 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 613 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
291 else 614 else
292 { 615 {
293#if CORO_PREFER_PERL_FUNCTIONS 616#if CORO_PREFER_PERL_FUNCTIONS
294 /* this is probably cleaner, but also slower? */ 617 /* this is probably cleaner? but also slower! */
618 /* in practise, it seems to be less stable */
295 CV *cp = Perl_cv_clone (cv); 619 CV *cp = Perl_cv_clone (aTHX_ cv);
296 CvPADLIST (cv) = CvPADLIST (cp); 620 CvPADLIST (cv) = CvPADLIST (cp);
297 CvPADLIST (cp) = 0; 621 CvPADLIST (cp) = 0;
298 SvREFCNT_dec (cp); 622 SvREFCNT_dec (cp);
299#else 623#else
300 CvPADLIST (cv) = coro_clone_padlist (cv); 624 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
301#endif 625#endif
302 } 626 }
303} 627}
304 628
305static void 629ecb_inline void
306put_padlist (CV *cv) 630put_padlist (pTHX_ CV *cv)
307{ 631{
308 MAGIC *mg = CORO_MAGIC (cv); 632 MAGIC *mg = CORO_MAGIC_cv (cv);
309 AV *av; 633 AV *av;
310 634
311 if (!mg) 635 if (ecb_expect_false (!mg))
312 { 636 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
313 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
314 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
315 mg->mg_virtual = &vtbl_coro;
316 mg->mg_obj = (SV *)newAV ();
317 }
318 637
319 av = (AV *)mg->mg_obj; 638 av = (AV *)mg->mg_obj;
320 639
321 if (AvFILLp (av) >= AvMAX (av)) 640 if (ecb_expect_false (AvFILLp (av) >= AvMAX (av)))
322 av_extend (av, AvMAX (av) + 1); 641 av_extend (av, AvFILLp (av) + 1);
323 642
324 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 643 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
325} 644}
326 645
327/** load & save, init *******************************************************/ 646/** load & save, init *******************************************************/
328 647
329#define SB do { 648ecb_inline void
330#define SE } while (0) 649swap_sv (SV *a, SV *b)
650{
651 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
652 SV tmp;
331 653
332#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE 654 /* swap sv_any */
655 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
333 656
657 /* swap sv_flags */
658 SvFLAGS (&tmp) = SvFLAGS (a);
659 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
660 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
661
662#if PERL_VERSION_ATLEAST (5,10,0)
663 /* perl 5.10 and later complicates this _quite_ a bit, but it also
664 * is much faster, so no quarrels here. alternatively, we could
665 * sv_upgrade to avoid this.
666 */
667 {
668 /* swap sv_u */
669 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
670
671 /* if SvANY points to the head, we need to adjust the pointers,
672 * as the pointer for a still points to b, and maybe vice versa.
673 */
674 #define svany_in_head(type) \
675 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
676
677 if (svany_in_head (SvTYPE (a)))
678 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
679
680 if (svany_in_head (SvTYPE (b)))
681 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
682 }
683#endif
684}
685
686/* swap sv heads, at least logically */
334static void 687static void
688swap_svs (pTHX_ Coro__State c)
689{
690 int i;
691
692 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
693 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
694}
695
696#define SWAP_SVS(coro) \
697 if (ecb_expect_false ((coro)->swap_sv)) \
698 swap_svs (aTHX_ (coro))
699
700static void
701on_enterleave_call (pTHX_ SV *cb);
702
703static void
335load_perl (Coro__State c) 704load_perl (pTHX_ Coro__State c)
336{ 705{
337#define VAR(name,type) PL_ ## name = c->name; 706 perl_slots *slot = c->slot;
707 c->slot = 0;
708
709 PL_mainstack = c->mainstack;
710
711#if CORO_JIT
712 load_perl_slots (slot);
713#else
714 #define VARx(name,expr,type) expr = slot->name;
338# include "state.h" 715 # include "state.h"
339#undef VAR 716 #undef VARx
340 717#endif
341 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
342 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
343 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
344 if (c->irssv)
345 {
346 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
347 SvREFCNT_dec (c->irssv);
348 else
349 {
350 REPLACE_SV (PL_rs, c->irssv);
351 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
352 sv_setsv (c->irssv_sv, PL_rs);
353 }
354 }
355 718
356 { 719 {
357 dSP; 720 dSP;
721
358 CV *cv; 722 CV *cv;
359 723
360 /* now do the ugly restore mess */ 724 /* now do the ugly restore mess */
361 while ((cv = (CV *)POPs)) 725 while (ecb_expect_true (cv = (CV *)POPs))
362 { 726 {
363 put_padlist (cv); /* mark this padlist as available */ 727 put_padlist (aTHX_ cv); /* mark this padlist as available */
364 CvDEPTH (cv) = PTR2IV (POPs); 728 CvDEPTH (cv) = PTR2IV (POPs);
365 CvPADLIST (cv) = (AV *)POPs; 729 CvPADLIST (cv) = (AV *)POPs;
366 } 730 }
367 731
368 PUTBACK; 732 PUTBACK;
369 } 733 }
370 assert (!PL_comppad || AvARRAY (PL_comppad));//D
371}
372 734
735 slf_frame = c->slf_frame;
736 CORO_THROW = c->except;
737
738 if (ecb_expect_false (enable_times))
739 {
740 if (ecb_expect_false (!times_valid))
741 coro_times_update ();
742
743 coro_times_sub (c);
744 }
745
746 if (ecb_expect_false (c->on_enter))
747 {
748 int i;
749
750 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
751 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
752 }
753
754 SWAP_SVS (c);
755}
756
373static void 757static void
374save_perl (Coro__State c) 758save_perl (pTHX_ Coro__State c)
375{ 759{
376 assert (!PL_comppad || AvARRAY (PL_comppad));//D 760 SWAP_SVS (c);
761
762 if (ecb_expect_false (c->on_leave))
763 {
764 int i;
765
766 for (i = AvFILLp (c->on_leave); i >= 0; --i)
767 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
768 }
769
770 times_valid = 0;
771
772 if (ecb_expect_false (enable_times))
773 {
774 coro_times_update (); times_valid = 1;
775 coro_times_add (c);
776 }
777
778 c->except = CORO_THROW;
779 c->slf_frame = slf_frame;
780
377 { 781 {
378 dSP; 782 dSP;
379 I32 cxix = cxstack_ix; 783 I32 cxix = cxstack_ix;
380 PERL_CONTEXT *ccstk = cxstack; 784 PERL_CONTEXT *ccstk = cxstack;
381 PERL_SI *top_si = PL_curstackinfo; 785 PERL_SI *top_si = PL_curstackinfo;
… …
383 /* 787 /*
384 * the worst thing you can imagine happens first - we have to save 788 * the worst thing you can imagine happens first - we have to save
385 * (and reinitialize) all cv's in the whole callchain :( 789 * (and reinitialize) all cv's in the whole callchain :(
386 */ 790 */
387 791
388 EXTEND (SP, 3 + 1);
389 PUSHs (Nullsv); 792 XPUSHs (Nullsv);
390 /* this loop was inspired by pp_caller */ 793 /* this loop was inspired by pp_caller */
391 for (;;) 794 for (;;)
392 { 795 {
393 while (cxix >= 0) 796 while (ecb_expect_true (cxix >= 0))
394 { 797 {
395 PERL_CONTEXT *cx = &ccstk[cxix--]; 798 PERL_CONTEXT *cx = &ccstk[cxix--];
396 799
397 if (CxTYPE (cx) == CXt_SUB) 800 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
398 { 801 {
399 CV *cv = cx->blk_sub.cv; 802 CV *cv = cx->blk_sub.cv;
400 803
401 if (CvDEPTH (cv)) 804 if (ecb_expect_true (CvDEPTH (cv)))
402 { 805 {
403 EXTEND (SP, 3); 806 EXTEND (SP, 3);
404 PUSHs ((SV *)CvPADLIST (cv)); 807 PUSHs ((SV *)CvPADLIST (cv));
405 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 808 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
406 PUSHs ((SV *)cv); 809 PUSHs ((SV *)cv);
407 810
408 CvDEPTH (cv) = 0; 811 CvDEPTH (cv) = 0;
409 get_padlist (cv); 812 get_padlist (aTHX_ cv);
410 } 813 }
411 } 814 }
412 } 815 }
413 816
414 if (top_si->si_type == PERLSI_MAIN) 817 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
415 break; 818 break;
416 819
417 top_si = top_si->si_prev; 820 top_si = top_si->si_prev;
418 ccstk = top_si->si_cxstack; 821 ccstk = top_si->si_cxstack;
419 cxix = top_si->si_cxix; 822 cxix = top_si->si_cxix;
420 } 823 }
421 824
422 PUTBACK; 825 PUTBACK;
423 } 826 }
424 827
425 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 828 /* allocate some space on the context stack for our purposes */
426 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 829 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
427 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 830 {
428 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; 831 unsigned int i;
429 832
430#define VAR(name,type)c->name = PL_ ## name; 833 for (i = 0; i < SLOT_COUNT; ++i)
834 CXINC;
835
836 cxstack_ix -= SLOT_COUNT; /* undo allocation */
837 }
838
839 c->mainstack = PL_mainstack;
840
841 {
842 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
843
844#if CORO_JIT
845 save_perl_slots (slot);
846#else
847 #define VARx(name,expr,type) slot->name = expr;
431# include "state.h" 848 # include "state.h"
432#undef VAR 849 #undef VARx
850#endif
851 }
433} 852}
434 853
435/* 854/*
436 * allocate various perl stacks. This is an exact copy 855 * allocate various perl stacks. This is almost an exact copy
437 * of perl.c:init_stacks, except that it uses less memory 856 * of perl.c:init_stacks, except that it uses less memory
438 * on the (sometimes correct) assumption that coroutines do 857 * on the (sometimes correct) assumption that coroutines do
439 * not usually need a lot of stackspace. 858 * not usually need a lot of stackspace.
440 */ 859 */
441#if CORO_PREFER_PERL_FUNCTIONS 860#if CORO_PREFER_PERL_FUNCTIONS
442# define coro_init_stacks init_stacks 861# define coro_init_stacks(thx) init_stacks ()
443#else 862#else
444static void 863static void
445coro_init_stacks () 864coro_init_stacks (pTHX)
446{ 865{
447 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 866 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
448 PL_curstackinfo->si_type = PERLSI_MAIN; 867 PL_curstackinfo->si_type = PERLSI_MAIN;
449 PL_curstack = PL_curstackinfo->si_stack; 868 PL_curstack = PL_curstackinfo->si_stack;
450 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 869 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
451 870
452 PL_stack_base = AvARRAY(PL_curstack); 871 PL_stack_base = AvARRAY(PL_curstack);
453 PL_stack_sp = PL_stack_base; 872 PL_stack_sp = PL_stack_base;
454 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 873 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
455 874
456 New(50,PL_tmps_stack,128,SV*); 875 New(50,PL_tmps_stack,32,SV*);
457 PL_tmps_floor = -1; 876 PL_tmps_floor = -1;
458 PL_tmps_ix = -1; 877 PL_tmps_ix = -1;
459 PL_tmps_max = 128; 878 PL_tmps_max = 32;
460 879
461 New(54,PL_markstack,32,I32); 880 New(54,PL_markstack,16,I32);
462 PL_markstack_ptr = PL_markstack; 881 PL_markstack_ptr = PL_markstack;
463 PL_markstack_max = PL_markstack + 32; 882 PL_markstack_max = PL_markstack + 16;
464 883
465#ifdef SET_MARK_OFFSET 884#ifdef SET_MARK_OFFSET
466 SET_MARK_OFFSET; 885 SET_MARK_OFFSET;
467#endif 886#endif
468 887
469 New(54,PL_scopestack,32,I32); 888 New(54,PL_scopestack,8,I32);
470 PL_scopestack_ix = 0; 889 PL_scopestack_ix = 0;
471 PL_scopestack_max = 32; 890 PL_scopestack_max = 8;
891#if HAS_SCOPESTACK_NAME
892 New(54,PL_scopestack_name,8,const char*);
893#endif
472 894
473 New(54,PL_savestack,64,ANY); 895 New(54,PL_savestack,24,ANY);
474 PL_savestack_ix = 0; 896 PL_savestack_ix = 0;
475 PL_savestack_max = 64; 897 PL_savestack_max = 24;
476 898
477#if !PERL_VERSION_ATLEAST (5,9,0) 899#if !PERL_VERSION_ATLEAST (5,10,0)
478 New(54,PL_retstack,16,OP*); 900 New(54,PL_retstack,4,OP*);
479 PL_retstack_ix = 0; 901 PL_retstack_ix = 0;
480 PL_retstack_max = 16; 902 PL_retstack_max = 4;
481#endif 903#endif
482} 904}
483#endif 905#endif
484 906
485/* 907/*
486 * destroy the stacks, the callchain etc... 908 * destroy the stacks, the callchain etc...
487 */ 909 */
488static void 910static void
489coro_destroy_stacks () 911coro_destruct_stacks (pTHX)
490{ 912{
491 if (!IN_DESTRUCT)
492 {
493 /* restore all saved variables and stuff */
494 LEAVE_SCOPE (0);
495 assert (PL_tmps_floor == -1);
496
497 /* free all temporaries */
498 FREETMPS;
499 assert (PL_tmps_ix == -1);
500
501 /* unwind all extra stacks */
502 POPSTACK_TO (PL_mainstack);
503
504 /* unwind main stack */
505 dounwind (-1);
506 }
507
508 while (PL_curstackinfo->si_next) 913 while (PL_curstackinfo->si_next)
509 PL_curstackinfo = PL_curstackinfo->si_next; 914 PL_curstackinfo = PL_curstackinfo->si_next;
510 915
511 while (PL_curstackinfo) 916 while (PL_curstackinfo)
512 { 917 {
… …
521 } 926 }
522 927
523 Safefree (PL_tmps_stack); 928 Safefree (PL_tmps_stack);
524 Safefree (PL_markstack); 929 Safefree (PL_markstack);
525 Safefree (PL_scopestack); 930 Safefree (PL_scopestack);
931#if HAS_SCOPESTACK_NAME
932 Safefree (PL_scopestack_name);
933#endif
526 Safefree (PL_savestack); 934 Safefree (PL_savestack);
527#if !PERL_VERSION_ATLEAST (5,9,0) 935#if !PERL_VERSION_ATLEAST (5,10,0)
528 Safefree (PL_retstack); 936 Safefree (PL_retstack);
529#endif 937#endif
530} 938}
531 939
940#define CORO_RSS \
941 rss += sizeof (SYM (curstackinfo)); \
942 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
943 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
944 rss += SYM (tmps_max) * sizeof (SV *); \
945 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
946 rss += SYM (scopestack_max) * sizeof (I32); \
947 rss += SYM (savestack_max) * sizeof (ANY);
948
949static size_t
950coro_rss (pTHX_ struct coro *coro)
951{
952 size_t rss = sizeof (*coro);
953
954 if (coro->mainstack)
955 {
956 if (coro->flags & CF_RUNNING)
957 {
958 #define SYM(sym) PL_ ## sym
959 CORO_RSS;
960 #undef SYM
961 }
962 else
963 {
964 #define SYM(sym) coro->slot->sym
965 CORO_RSS;
966 #undef SYM
967 }
968 }
969
970 return rss;
971}
972
532/** coroutine stack handling ************************************************/ 973/** coroutine stack handling ************************************************/
533 974
975static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
976static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
977static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
978
979/* apparently < 5.8.8 */
980#ifndef MgPV_nolen_const
981#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
982 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
983 (const char*)(mg)->mg_ptr)
984#endif
985
986/*
987 * This overrides the default magic get method of %SIG elements.
988 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
989 * and instead of trying to save and restore the hash elements (extremely slow),
990 * we just provide our own readback here.
991 */
992static int ecb_cold
993coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
994{
995 const char *s = MgPV_nolen_const (mg);
996
997 if (*s == '_')
998 {
999 SV **svp = 0;
1000
1001 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1002 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1003
1004 if (svp)
1005 {
1006 SV *ssv;
1007
1008 if (!*svp)
1009 ssv = &PL_sv_undef;
1010 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1011 ssv = sv_2mortal (newRV_inc (*svp));
1012 else
1013 ssv = *svp;
1014
1015 sv_setsv (sv, ssv);
1016 return 0;
1017 }
1018 }
1019
1020 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1021}
1022
1023static int ecb_cold
1024coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1025{
1026 const char *s = MgPV_nolen_const (mg);
1027
1028 if (*s == '_')
1029 {
1030 SV **svp = 0;
1031
1032 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1033 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1034
1035 if (svp)
1036 {
1037 SV *old = *svp;
1038 *svp = 0;
1039 SvREFCNT_dec (old);
1040 return 0;
1041 }
1042 }
1043
1044 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1045}
1046
1047static int ecb_cold
1048coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1049{
1050 const char *s = MgPV_nolen_const (mg);
1051
1052 if (*s == '_')
1053 {
1054 SV **svp = 0;
1055
1056 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1057 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1058
1059 if (svp)
1060 {
1061 SV *old = *svp;
1062 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1063 SvREFCNT_dec (old);
1064 return 0;
1065 }
1066 }
1067
1068 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1069}
1070
1071static void
1072prepare_nop (pTHX_ struct coro_transfer_args *ta)
1073{
1074 /* kind of mega-hacky, but works */
1075 ta->next = ta->prev = (struct coro *)ta;
1076}
1077
534static void 1078static int
535setup_coro (struct coro *coro) 1079slf_check_nop (pTHX_ struct CoroSLF *frame)
1080{
1081 return 0;
1082}
1083
1084static int
1085slf_check_repeat (pTHX_ struct CoroSLF *frame)
1086{
1087 return 1;
1088}
1089
1090static UNOP init_perl_op;
1091
1092ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1093init_perl (pTHX_ struct coro *coro)
536{ 1094{
537 /* 1095 /*
538 * emulate part of the perl startup here. 1096 * emulate part of the perl startup here.
539 */ 1097 */
540
541 coro_init_stacks (); 1098 coro_init_stacks (aTHX);
542 1099
1100 PL_runops = RUNOPS_DEFAULT;
543 PL_curcop = &PL_compiling; 1101 PL_curcop = &PL_compiling;
544 PL_in_eval = EVAL_NULL; 1102 PL_in_eval = EVAL_NULL;
545 PL_comppad = 0; 1103 PL_comppad = 0;
1104 PL_comppad_name = 0;
1105 PL_comppad_name_fill = 0;
1106 PL_comppad_name_floor = 0;
546 PL_curpm = 0; 1107 PL_curpm = 0;
1108 PL_curpad = 0;
547 PL_localizing = 0; 1109 PL_localizing = 0;
548 PL_dirty = 0;
549 PL_restartop = 0; 1110 PL_restartop = 0;
1111#if PERL_VERSION_ATLEAST (5,10,0)
1112 PL_parser = 0;
1113#endif
1114 PL_hints = 0;
1115
1116 /* recreate the die/warn hooks */
1117 PL_diehook = SvREFCNT_inc (rv_diehook);
1118 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1119
1120 GvSV (PL_defgv) = newSV (0);
1121 GvAV (PL_defgv) = coro->args; coro->args = 0;
1122 GvSV (PL_errgv) = newSV (0);
1123 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1124 GvHV (PL_hintgv) = 0;
1125 PL_rs = newSVsv (GvSV (irsgv));
1126 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
550 1127
551 { 1128 {
552 dSP; 1129 dSP;
553 LOGOP myop; 1130 UNOP myop;
554 1131
555 SvREFCNT_dec (GvAV (PL_defgv));
556 GvAV (PL_defgv) = coro->args; coro->args = 0;
557
558 Zero (&myop, 1, LOGOP); 1132 Zero (&myop, 1, UNOP);
559 myop.op_next = Nullop; 1133 myop.op_next = Nullop;
1134 myop.op_type = OP_ENTERSUB;
560 myop.op_flags = OPf_WANT_VOID; 1135 myop.op_flags = OPf_WANT_VOID;
561 1136
562 PUSHMARK (SP); 1137 PUSHMARK (SP);
563 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE)); 1138 PUSHs ((SV *)coro->startcv);
564 PUTBACK; 1139 PUTBACK;
565 PL_op = (OP *)&myop; 1140 PL_op = (OP *)&myop;
566 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1141 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
567 SPAGAIN;
568 } 1142 }
569 1143
570 ENTER; /* necessary e.g. for dounwind */ 1144 /* this newly created coroutine might be run on an existing cctx which most
571} 1145 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1146 */
1147 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1148 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1149 slf_frame.destroy = 0;
572 1150
1151 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1152 init_perl_op.op_next = PL_op;
1153 init_perl_op.op_type = OP_ENTERSUB;
1154 init_perl_op.op_ppaddr = pp_slf;
1155 /* no flags etc. required, as an init function won't be called */
1156
1157 PL_op = (OP *)&init_perl_op;
1158
1159 /* copy throw, in case it was set before init_perl */
1160 CORO_THROW = coro->except;
1161
1162 SWAP_SVS (coro);
1163
1164 if (ecb_expect_false (enable_times))
1165 {
1166 coro_times_update ();
1167 coro_times_sub (coro);
1168 }
1169}
1170
573static void 1171static void
1172coro_unwind_stacks (pTHX)
1173{
1174 if (!IN_DESTRUCT)
1175 {
1176 /* restore all saved variables and stuff */
1177 LEAVE_SCOPE (0);
1178 assert (PL_tmps_floor == -1);
1179
1180 /* free all temporaries */
1181 FREETMPS;
1182 assert (PL_tmps_ix == -1);
1183
1184 /* unwind all extra stacks */
1185 POPSTACK_TO (PL_mainstack);
1186
1187 /* unwind main stack */
1188 dounwind (-1);
1189 }
1190}
1191
1192static void
1193destroy_perl (pTHX_ struct coro *coro)
1194{
1195 SV *svf [9];
1196
1197 {
1198 SV *old_current = SvRV (coro_current);
1199 struct coro *current = SvSTATE (old_current);
1200
1201 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1202
1203 save_perl (aTHX_ current);
1204
1205 /* this will cause transfer_check to croak on block*/
1206 SvRV_set (coro_current, (SV *)coro->hv);
1207
1208 load_perl (aTHX_ coro);
1209
1210 coro_unwind_stacks (aTHX);
1211
1212 /* restore swapped sv's */
1213 SWAP_SVS (coro);
1214
1215 coro_destruct_stacks (aTHX);
1216
1217 /* now save some sv's to be free'd later */
1218 svf [0] = GvSV (PL_defgv);
1219 svf [1] = (SV *)GvAV (PL_defgv);
1220 svf [2] = GvSV (PL_errgv);
1221 svf [3] = (SV *)PL_defoutgv;
1222 svf [4] = PL_rs;
1223 svf [5] = GvSV (irsgv);
1224 svf [6] = (SV *)GvHV (PL_hintgv);
1225 svf [7] = PL_diehook;
1226 svf [8] = PL_warnhook;
1227 assert (9 == sizeof (svf) / sizeof (*svf));
1228
1229 SvRV_set (coro_current, old_current);
1230
1231 load_perl (aTHX_ current);
1232 }
1233
1234 {
1235 unsigned int i;
1236
1237 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1238 SvREFCNT_dec (svf [i]);
1239
1240 SvREFCNT_dec (coro->saved_deffh);
1241 SvREFCNT_dec (coro->rouse_cb);
1242 SvREFCNT_dec (coro->invoke_cb);
1243 SvREFCNT_dec (coro->invoke_av);
1244 }
1245}
1246
1247ecb_inline void
574free_coro_mortal () 1248free_coro_mortal (pTHX)
575{ 1249{
576 if (coro_mortal) 1250 if (ecb_expect_true (coro_mortal))
577 { 1251 {
578 SvREFCNT_dec (coro_mortal); 1252 SvREFCNT_dec ((SV *)coro_mortal);
579 coro_mortal = 0; 1253 coro_mortal = 0;
580 } 1254 }
581} 1255}
582 1256
583/* inject a fake call to Coro::State::_cctx_init into the execution */
584static void NOINLINE
585prepare_cctx (coro_cctx *cctx)
586{
587 dSP;
588 LOGOP myop;
589
590 Zero (&myop, 1, LOGOP);
591 myop.op_next = PL_op;
592 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
593
594 PUSHMARK (SP);
595 EXTEND (SP, 2);
596 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
597 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
598 PUTBACK;
599 PL_op = (OP *)&myop;
600 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
601 SPAGAIN;
602}
603
604static void 1257static int
605coro_run (void *arg) 1258runops_trace (pTHX)
606{ 1259{
607 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1260 COP *oldcop = 0;
608 UNLOCK; 1261 int oldcxix = -2;
609 1262
610 /* 1263 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
611 * this is a _very_ stripped down perl interpreter ;) 1264 {
612 */ 1265 PERL_ASYNC_CHECK ();
1266
1267 if (cctx_current->flags & CC_TRACE_ALL)
1268 {
1269 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1270 {
1271 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1272 SV **bot, **top;
1273 AV *av = newAV (); /* return values */
1274 SV **cb;
1275 dSP;
1276
1277 GV *gv = CvGV (cx->blk_sub.cv);
1278 SV *fullname = sv_2mortal (newSV (0));
1279 if (isGV (gv))
1280 gv_efullname3 (fullname, gv, 0);
1281
1282 bot = PL_stack_base + cx->blk_oldsp + 1;
1283 top = cx->blk_gimme == G_ARRAY ? SP + 1
1284 : cx->blk_gimme == G_SCALAR ? bot + 1
1285 : bot;
1286
1287 av_extend (av, top - bot);
1288 while (bot < top)
1289 av_push (av, SvREFCNT_inc_NN (*bot++));
1290
1291 PL_runops = RUNOPS_DEFAULT;
1292 ENTER;
1293 SAVETMPS;
1294 EXTEND (SP, 3);
1295 PUSHMARK (SP);
1296 PUSHs (&PL_sv_no);
1297 PUSHs (fullname);
1298 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1299 PUTBACK;
1300 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1301 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1302 SPAGAIN;
1303 FREETMPS;
1304 LEAVE;
1305 PL_runops = runops_trace;
1306 }
1307
1308 if (oldcop != PL_curcop)
1309 {
1310 oldcop = PL_curcop;
1311
1312 if (PL_curcop != &PL_compiling)
1313 {
1314 SV **cb;
1315
1316 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1317 {
1318 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1319
1320 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1321 {
1322 dSP;
1323 GV *gv = CvGV (cx->blk_sub.cv);
1324 SV *fullname = sv_2mortal (newSV (0));
1325
1326 if (isGV (gv))
1327 gv_efullname3 (fullname, gv, 0);
1328
1329 PL_runops = RUNOPS_DEFAULT;
1330 ENTER;
1331 SAVETMPS;
1332 EXTEND (SP, 3);
1333 PUSHMARK (SP);
1334 PUSHs (&PL_sv_yes);
1335 PUSHs (fullname);
1336 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1337 PUTBACK;
1338 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1339 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1340 SPAGAIN;
1341 FREETMPS;
1342 LEAVE;
1343 PL_runops = runops_trace;
1344 }
1345
1346 oldcxix = cxstack_ix;
1347 }
1348
1349 if (cctx_current->flags & CC_TRACE_LINE)
1350 {
1351 dSP;
1352
1353 PL_runops = RUNOPS_DEFAULT;
1354 ENTER;
1355 SAVETMPS;
1356 EXTEND (SP, 3);
1357 PL_runops = RUNOPS_DEFAULT;
1358 PUSHMARK (SP);
1359 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1360 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1361 PUTBACK;
1362 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1363 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1364 SPAGAIN;
1365 FREETMPS;
1366 LEAVE;
1367 PL_runops = runops_trace;
1368 }
1369 }
1370 }
1371 }
1372 }
1373
1374 TAINT_NOT;
1375 return 0;
1376}
1377
1378static struct CoroSLF cctx_ssl_frame;
1379
1380static void
1381slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1382{
1383 ta->prev = 0;
1384}
1385
1386static int
1387slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1388{
1389 *frame = cctx_ssl_frame;
1390
1391 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1392}
1393
1394/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1395static void ecb_noinline
1396cctx_prepare (pTHX)
1397{
613 PL_top_env = &PL_start_env; 1398 PL_top_env = &PL_start_env;
614 1399
1400 if (cctx_current->flags & CC_TRACE)
1401 PL_runops = runops_trace;
1402
1403 /* we already must be executing an SLF op, there is no other valid way
1404 * that can lead to creation of a new cctx */
1405 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1406 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1407
1408 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1409 cctx_ssl_frame = slf_frame;
1410
1411 slf_frame.prepare = slf_prepare_set_stacklevel;
1412 slf_frame.check = slf_check_set_stacklevel;
1413}
1414
1415/* the tail of transfer: execute stuff we can only do after a transfer */
1416ecb_inline void
1417transfer_tail (pTHX)
1418{
1419 free_coro_mortal (aTHX);
1420}
1421
1422/*
1423 * this is a _very_ stripped down perl interpreter ;)
1424 */
1425static void
1426cctx_run (void *arg)
1427{
1428#ifdef USE_ITHREADS
1429# if CORO_PTHREAD
1430 PERL_SET_CONTEXT (coro_thx);
1431# endif
1432#endif
1433 {
1434 dTHX;
1435
1436 /* normally we would need to skip the entersub here */
1437 /* not doing so will re-execute it, which is exactly what we want */
1438 /* PL_nop = PL_nop->op_next */
1439
615 /* inject call to cctx_init */ 1440 /* inject a fake subroutine call to cctx_init */
616 prepare_cctx ((coro_cctx *)arg); 1441 cctx_prepare (aTHX);
617 1442
1443 /* cctx_run is the alternative tail of transfer() */
1444 transfer_tail (aTHX);
1445
618 /* somebody will hit me for both perl_run and PL_restartop */ 1446 /* somebody or something will hit me for both perl_run and PL_restartop */
619 PL_restartop = PL_op; 1447 PL_restartop = PL_op;
620 perl_run (PL_curinterp); 1448 perl_run (PL_curinterp);
1449 /*
1450 * Unfortunately, there is no way to get at the return values of the
1451 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1452 * runtime errors here, as this is just a random interpreter, not a thread.
1453 */
621 1454
622 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1455 /*
623 abort (); 1456 * If perl-run returns we assume exit() was being called or the coro
1457 * fell off the end, which seems to be the only valid (non-bug)
1458 * reason for perl_run to return. We try to exit by jumping to the
1459 * bootstrap-time "top" top_env, as we cannot restore the "main"
1460 * coroutine as Coro has no such concept.
1461 * This actually isn't valid with the pthread backend, but OSes requiring
1462 * that backend are too broken to do it in a standards-compliant way.
1463 */
1464 PL_top_env = main_top_env;
1465 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1466 }
624} 1467}
625 1468
626static coro_cctx * 1469static coro_cctx *
627cctx_new () 1470cctx_new (void)
628{ 1471{
629 coro_cctx *cctx; 1472 coro_cctx *cctx;
1473
1474 ++cctx_count;
1475 New (0, cctx, 1, coro_cctx);
1476
1477 cctx->gen = cctx_gen;
1478 cctx->flags = 0;
1479 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1480
1481 return cctx;
1482}
1483
1484/* create a new cctx only suitable as source */
1485static coro_cctx *
1486cctx_new_empty (void)
1487{
1488 coro_cctx *cctx = cctx_new ();
1489
1490 cctx->sptr = 0;
1491 coro_create (&cctx->cctx, 0, 0, 0, 0);
1492
1493 return cctx;
1494}
1495
1496/* create a new cctx suitable as destination/running a perl interpreter */
1497static coro_cctx *
1498cctx_new_run (void)
1499{
1500 coro_cctx *cctx = cctx_new ();
630 void *stack_start; 1501 void *stack_start;
631 size_t stack_size; 1502 size_t stack_size;
632 1503
633 ++cctx_count;
634
635 Newz (0, cctx, 1, coro_cctx);
636
637#if HAVE_MMAP 1504#if HAVE_MMAP
638
639 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1505 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
640 /* mmap supposedly does allocate-on-write for us */ 1506 /* mmap supposedly does allocate-on-write for us */
641 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1507 cctx->sptr = mmap (0, cctx->ssize, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_ANONYMOUS, 0, 0);
642 1508
643 if (cctx->sptr != (void *)-1) 1509 if (cctx->sptr != (void *)-1)
644 { 1510 {
645# if CORO_STACKGUARD 1511 #if CORO_STACKGUARD
646 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1512 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
647# endif 1513 #endif
648 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1514 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
649 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1515 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
650 cctx->mapped = 1; 1516 cctx->flags |= CC_MAPPED;
651 } 1517 }
652 else 1518 else
653#endif 1519#endif
654 { 1520 {
655 cctx->ssize = coro_stacksize * (long)sizeof (long); 1521 cctx->ssize = cctx_stacksize * (long)sizeof (long);
656 New (0, cctx->sptr, coro_stacksize, long); 1522 New (0, cctx->sptr, cctx_stacksize, long);
657 1523
658 if (!cctx->sptr) 1524 if (!cctx->sptr)
659 { 1525 {
660 perror ("FATAL: unable to allocate stack for coroutine"); 1526 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
661 _exit (EXIT_FAILURE); 1527 _exit (EXIT_FAILURE);
662 } 1528 }
663 1529
664 stack_start = cctx->sptr; 1530 stack_start = cctx->sptr;
665 stack_size = cctx->ssize; 1531 stack_size = cctx->ssize;
666 } 1532 }
667 1533
668 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1534 #if CORO_USE_VALGRIND
1535 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1536 #endif
1537
669 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1538 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
670 1539
671 return cctx; 1540 return cctx;
672} 1541}
673 1542
674static void 1543static void
675cctx_destroy (coro_cctx *cctx) 1544cctx_destroy (coro_cctx *cctx)
676{ 1545{
677 if (!cctx) 1546 if (!cctx)
678 return; 1547 return;
679 1548
1549 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1550
680 --cctx_count; 1551 --cctx_count;
1552 coro_destroy (&cctx->cctx);
681 1553
1554 /* coro_transfer creates new, empty cctx's */
1555 if (cctx->sptr)
1556 {
682#if CORO_USE_VALGRIND 1557 #if CORO_USE_VALGRIND
683 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1558 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
684#endif 1559 #endif
685 1560
686#if HAVE_MMAP 1561#if HAVE_MMAP
687 if (cctx->mapped) 1562 if (cctx->flags & CC_MAPPED)
688 munmap (cctx->sptr, cctx->ssize); 1563 munmap (cctx->sptr, cctx->ssize);
689 else 1564 else
690#endif 1565#endif
691 Safefree (cctx->sptr); 1566 Safefree (cctx->sptr);
1567 }
692 1568
693 Safefree (cctx); 1569 Safefree (cctx);
694} 1570}
695 1571
1572/* wether this cctx should be destructed */
1573#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1574
696static coro_cctx * 1575static coro_cctx *
697cctx_get () 1576cctx_get (pTHX)
698{ 1577{
699 while (cctx_first) 1578 while (ecb_expect_true (cctx_first))
700 { 1579 {
701 coro_cctx *cctx = cctx_first; 1580 coro_cctx *cctx = cctx_first;
702 cctx_first = cctx->next; 1581 cctx_first = cctx->next;
703 --cctx_idle; 1582 --cctx_idle;
704 1583
705 if (cctx->ssize >= coro_stacksize) 1584 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
706 return cctx; 1585 return cctx;
707 1586
708 cctx_destroy (cctx); 1587 cctx_destroy (cctx);
709 } 1588 }
710 1589
711 PL_op = PL_op->op_next;
712 return cctx_new (); 1590 return cctx_new_run ();
713} 1591}
714 1592
715static void 1593static void
716cctx_put (coro_cctx *cctx) 1594cctx_put (coro_cctx *cctx)
717{ 1595{
1596 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1597
718 /* free another cctx if overlimit */ 1598 /* free another cctx if overlimit */
719 if (cctx_idle >= MAX_IDLE_CCTX) 1599 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
720 { 1600 {
721 coro_cctx *first = cctx_first; 1601 coro_cctx *first = cctx_first;
722 cctx_first = first->next; 1602 cctx_first = first->next;
723 --cctx_idle; 1603 --cctx_idle;
724 1604
725 assert (!first->inuse);
726 cctx_destroy (first); 1605 cctx_destroy (first);
727 } 1606 }
728 1607
729 ++cctx_idle; 1608 ++cctx_idle;
730 cctx->next = cctx_first; 1609 cctx->next = cctx_first;
731 cctx_first = cctx; 1610 cctx_first = cctx;
732} 1611}
733 1612
734/** coroutine switching *****************************************************/ 1613/** coroutine switching *****************************************************/
735 1614
736/* never call directly, always through the coro_state_transfer global variable */ 1615static void
737static void NOINLINE
738transfer (struct coro *prev, struct coro *next) 1616transfer_check (pTHX_ struct coro *prev, struct coro *next)
1617{
1618 /* TODO: throwing up here is considered harmful */
1619
1620 if (ecb_expect_true (prev != next))
1621 {
1622 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1623 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1624
1625 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1626 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1627
1628#if !PERL_VERSION_ATLEAST (5,10,0)
1629 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1630 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1631#endif
1632 }
1633}
1634
1635/* always use the TRANSFER macro */
1636static void ecb_noinline /* noinline so we have a fixed stackframe */
1637transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
739{ 1638{
740 dSTACKLEVEL; 1639 dSTACKLEVEL;
741 1640
742 /* sometimes transfer is only called to set idle_sp */ 1641 /* sometimes transfer is only called to set idle_sp */
743 if (!next) 1642 if (ecb_expect_false (!prev))
744 { 1643 {
745 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1644 cctx_current->idle_sp = STACKLEVEL;
746 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1645 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
747 }
748 else if (prev != next)
749 { 1646 }
1647 else if (ecb_expect_true (prev != next))
1648 {
750 coro_cctx *prev__cctx; 1649 coro_cctx *cctx_prev;
751 1650
752 if (prev->flags & CF_NEW) 1651 if (ecb_expect_false (prev->flags & CF_NEW))
753 { 1652 {
754 /* create a new empty context */ 1653 /* create a new empty/source context */
755 Newz (0, prev->cctx, 1, coro_cctx);
756 prev->cctx->inuse = 1;
757 prev->flags &= ~CF_NEW; 1654 prev->flags &= ~CF_NEW;
758 prev->flags |= CF_RUNNING; 1655 prev->flags |= CF_RUNNING;
759 } 1656 }
760 1657
761 /*TODO: must not croak here */
762 if (!prev->flags & CF_RUNNING)
763 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
764
765 if (next->flags & CF_RUNNING)
766 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
767
768 if (next->flags & CF_DESTROYED)
769 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
770
771 prev->flags &= ~CF_RUNNING; 1658 prev->flags &= ~CF_RUNNING;
772 next->flags |= CF_RUNNING; 1659 next->flags |= CF_RUNNING;
773 1660
774 LOCK; 1661 /* first get rid of the old state */
1662 save_perl (aTHX_ prev);
775 1663
776 if (next->flags & CF_NEW) 1664 if (ecb_expect_false (next->flags & CF_NEW))
777 { 1665 {
778 /* need to start coroutine */ 1666 /* need to start coroutine */
779 next->flags &= ~CF_NEW; 1667 next->flags &= ~CF_NEW;
780 /* first get rid of the old state */
781 save_perl (prev);
782 /* setup coroutine call */ 1668 /* setup coroutine call */
783 setup_coro (next); 1669 init_perl (aTHX_ next);
784 /* need a new stack */
785 assert (!next->cctx);
786 } 1670 }
787 else 1671 else
1672 load_perl (aTHX_ next);
1673
1674 /* possibly untie and reuse the cctx */
1675 if (ecb_expect_true (
1676 cctx_current->idle_sp == STACKLEVEL
1677 && !(cctx_current->flags & CC_TRACE)
1678 && !force_cctx
1679 ))
788 { 1680 {
789 /* coroutine already started */ 1681 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
790 save_perl (prev); 1682 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
791 load_perl (next); 1683
1684 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1685 /* without this the next cctx_get might destroy the running cctx while still in use */
1686 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1687 if (ecb_expect_true (!next->cctx))
1688 next->cctx = cctx_get (aTHX);
1689
1690 cctx_put (cctx_current);
792 } 1691 }
1692 else
1693 prev->cctx = cctx_current;
793 1694
794 prev__cctx = prev->cctx; 1695 ++next->usecount;
795 1696
796 /* possibly "free" the cctx */ 1697 cctx_prev = cctx_current;
797 if (prev__cctx->idle_sp == STACKLEVEL) 1698 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1699
1700 next->cctx = 0;
1701
1702 if (ecb_expect_false (cctx_prev != cctx_current))
798 { 1703 {
799 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1704 cctx_prev->top_env = PL_top_env;
800 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1705 PL_top_env = cctx_current->top_env;
801 1706 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
802 prev->cctx = 0;
803
804 cctx_put (prev__cctx);
805 prev__cctx->inuse = 0;
806 } 1707 }
807 1708
808 if (!next->cctx) 1709 transfer_tail (aTHX);
809 {
810 next->cctx = cctx_get ();
811 assert (!next->cctx->inuse);
812 next->cctx->inuse = 1;
813 }
814
815 if (prev__cctx != next->cctx)
816 {
817 prev__cctx->top_env = PL_top_env;
818 PL_top_env = next->cctx->top_env;
819 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
820 }
821
822 free_coro_mortal ();
823 UNLOCK;
824 } 1710 }
825} 1711}
826 1712
827struct transfer_args 1713#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
828{
829 struct coro *prev, *next;
830};
831
832#define TRANSFER(ta) transfer ((ta).prev, (ta).next) 1714#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
833 1715
834/** high level stuff ********************************************************/ 1716/** high level stuff ********************************************************/
835 1717
1718/* this function is actually Coro, not Coro::State, but we call it from here */
1719/* because it is convenient - but it hasn't been declared yet for that reason */
836static int 1720static void
1721coro_call_on_destroy (pTHX_ struct coro *coro);
1722
1723static void
837coro_state_destroy (struct coro *coro) 1724coro_state_destroy (pTHX_ struct coro *coro)
838{ 1725{
839 if (coro->flags & CF_DESTROYED) 1726 if (coro->flags & CF_ZOMBIE)
840 return 0; 1727 return;
841 1728
1729 slf_destroy (aTHX_ coro);
1730
842 coro->flags |= CF_DESTROYED; 1731 coro->flags |= CF_ZOMBIE;
843 1732
844 if (coro->flags & CF_READY) 1733 if (coro->flags & CF_READY)
845 { 1734 {
846 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1735 /* reduce nready, as destroying a ready coro effectively unreadies it */
847 /* alternative: look through all ready queues and remove the coro */ 1736 /* alternative: look through all ready queues and remove the coro */
848 LOCK;
849 --coro_nready; 1737 --coro_nready;
850 UNLOCK;
851 } 1738 }
852 else 1739 else
853 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1740 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
854 1741
855 if (coro->mainstack && coro->mainstack != main_mainstack) 1742 if (coro->next) coro->next->prev = coro->prev;
856 { 1743 if (coro->prev) coro->prev->next = coro->next;
857 struct coro temp; 1744 if (coro == coro_first) coro_first = coro->next;
858 1745
859 assert (!(coro->flags & CF_RUNNING)); 1746 if (coro->mainstack
860 1747 && coro->mainstack != main_mainstack
861 Zero (&temp, 1, struct coro); 1748 && coro->slot
862 temp.save = CORO_SAVE_ALL; 1749 && !PL_dirty)
863 1750 destroy_perl (aTHX_ coro);
864 if (coro->flags & CF_RUNNING)
865 croak ("FATAL: tried to destroy currently running coroutine");
866
867 save_perl (&temp);
868 load_perl (coro);
869
870 coro_destroy_stacks ();
871
872 load_perl (&temp); /* this will get rid of defsv etc.. */
873
874 coro->mainstack = 0;
875 }
876 1751
877 cctx_destroy (coro->cctx); 1752 cctx_destroy (coro->cctx);
1753 SvREFCNT_dec (coro->startcv);
878 SvREFCNT_dec (coro->args); 1754 SvREFCNT_dec (coro->args);
1755 SvREFCNT_dec (coro->swap_sv);
1756 SvREFCNT_dec (CORO_THROW);
879 1757
880 return 1; 1758 coro_call_on_destroy (aTHX_ coro);
1759
1760 /* more destruction mayhem in coro_state_free */
881} 1761}
882 1762
883static int 1763static int
884coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1764coro_state_free (pTHX_ SV *sv, MAGIC *mg)
885{ 1765{
886 struct coro *coro = (struct coro *)mg->mg_ptr; 1766 struct coro *coro = (struct coro *)mg->mg_ptr;
887 mg->mg_ptr = 0; 1767 mg->mg_ptr = 0;
888 1768
889 if (--coro->refcnt < 0)
890 {
891 coro_state_destroy (coro); 1769 coro_state_destroy (aTHX_ coro);
1770 SvREFCNT_dec (coro->on_destroy);
1771 SvREFCNT_dec (coro->status);
1772
892 Safefree (coro); 1773 Safefree (coro);
893 }
894 1774
895 return 0; 1775 return 0;
896} 1776}
897 1777
898static int 1778static int ecb_cold
899coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1779coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
900{ 1780{
901 struct coro *coro = (struct coro *)mg->mg_ptr; 1781 /* called when perl clones the current process the slow way (windows process emulation) */
902 1782 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
903 ++coro->refcnt; 1783 mg->mg_ptr = 0;
1784 mg->mg_virtual = 0;
904 1785
905 return 0; 1786 return 0;
906} 1787}
907 1788
908static MGVTBL coro_state_vtbl = { 1789static MGVTBL coro_state_vtbl = {
… …
914#else 1795#else
915# define MGf_DUP 0 1796# define MGf_DUP 0
916#endif 1797#endif
917}; 1798};
918 1799
919static struct coro *
920SvSTATE (SV *coro)
921{
922 HV *stash;
923 MAGIC *mg;
924
925 if (SvROK (coro))
926 coro = SvRV (coro);
927
928 stash = SvSTASH (coro);
929 if (stash != coro_stash && stash != coro_state_stash)
930 {
931 /* very slow, but rare, check */
932 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
933 croak ("Coro::State object required");
934 }
935
936 mg = CORO_MAGIC (coro);
937 return (struct coro *)mg->mg_ptr;
938}
939
940static void 1800static void
941prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1801prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
942{ 1802{
943 ta->prev = SvSTATE (prev_sv); 1803 ta->prev = SvSTATE (prev_sv);
944 ta->next = SvSTATE (next_sv); 1804 ta->next = SvSTATE (next_sv);
1805 TRANSFER_CHECK (*ta);
945} 1806}
946 1807
947static void 1808static void
948api_transfer (SV *prev_sv, SV *next_sv) 1809api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
949{ 1810{
950 struct transfer_args ta; 1811 struct coro_transfer_args ta;
951 1812
952 prepare_transfer (&ta, prev_sv, next_sv); 1813 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
953 TRANSFER (ta); 1814 TRANSFER (ta, 1);
1815}
1816
1817/** Coro ********************************************************************/
1818
1819ecb_inline void
1820coro_enq (pTHX_ struct coro *coro)
1821{
1822 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1823
1824 SvREFCNT_inc_NN (coro->hv);
1825
1826 coro->next_ready = 0;
1827 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1828 ready [1] = coro;
1829}
1830
1831ecb_inline struct coro *
1832coro_deq (pTHX)
1833{
1834 int prio;
1835
1836 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1837 {
1838 struct coro **ready = coro_ready [prio];
1839
1840 if (ready [0])
1841 {
1842 struct coro *coro = ready [0];
1843 ready [0] = coro->next_ready;
1844 return coro;
1845 }
1846 }
1847
1848 return 0;
1849}
1850
1851static void
1852invoke_sv_ready_hook_helper (void)
1853{
1854 dTHX;
1855 dSP;
1856
1857 ENTER;
1858 SAVETMPS;
1859
1860 PUSHMARK (SP);
1861 PUTBACK;
1862 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1863
1864 FREETMPS;
1865 LEAVE;
954} 1866}
955 1867
956static int 1868static int
957api_save (SV *coro_sv, int new_save) 1869api_ready (pTHX_ SV *coro_sv)
958{ 1870{
959 struct coro *coro = SvSTATE (coro_sv); 1871 struct coro *coro = SvSTATE (coro_sv);
960 int old_save = coro->save;
961
962 if (new_save >= 0)
963 coro->save = new_save;
964
965 return old_save;
966}
967
968/** Coro ********************************************************************/
969
970static void
971coro_enq (SV *coro_sv)
972{
973 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
974}
975
976static SV *
977coro_deq (int min_prio)
978{
979 int prio = PRIO_MAX - PRIO_MIN;
980
981 min_prio -= PRIO_MIN;
982 if (min_prio < 0)
983 min_prio = 0;
984
985 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
986 if (AvFILLp (coro_ready [prio]) >= 0)
987 return av_shift (coro_ready [prio]);
988
989 return 0;
990}
991
992static int
993api_ready (SV *coro_sv)
994{
995 struct coro *coro;
996
997 if (SvROK (coro_sv))
998 coro_sv = SvRV (coro_sv);
999
1000 coro = SvSTATE (coro_sv);
1001 1872
1002 if (coro->flags & CF_READY) 1873 if (coro->flags & CF_READY)
1003 return 0; 1874 return 0;
1004 1875
1005 coro->flags |= CF_READY; 1876 coro->flags |= CF_READY;
1006 1877
1007 LOCK; 1878 coro_enq (aTHX_ coro);
1008 coro_enq (SvREFCNT_inc (coro_sv)); 1879
1009 ++coro_nready; 1880 if (!coro_nready++)
1010 UNLOCK; 1881 if (coroapi.readyhook)
1882 coroapi.readyhook ();
1011 1883
1012 return 1; 1884 return 1;
1013} 1885}
1014 1886
1015static int 1887static int
1016api_is_ready (SV *coro_sv) 1888api_is_ready (pTHX_ SV *coro_sv)
1017{ 1889{
1018 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1890 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1019} 1891}
1020 1892
1893/* expects to own a reference to next->hv */
1894ecb_inline void
1895prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1896{
1897 SV *prev_sv = SvRV (coro_current);
1898
1899 ta->prev = SvSTATE_hv (prev_sv);
1900 ta->next = next;
1901
1902 TRANSFER_CHECK (*ta);
1903
1904 SvRV_set (coro_current, (SV *)next->hv);
1905
1906 free_coro_mortal (aTHX);
1907 coro_mortal = prev_sv;
1908}
1909
1021static void 1910static void
1022prepare_schedule (struct transfer_args *ta) 1911prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1023{ 1912{
1024 SV *prev_sv, *next_sv;
1025
1026 for (;;) 1913 for (;;)
1027 { 1914 {
1028 LOCK; 1915 struct coro *next = coro_deq (aTHX);
1029 next_sv = coro_deq (PRIO_MIN);
1030 1916
1917 if (ecb_expect_true (next))
1918 {
1919 /* cannot transfer to destroyed coros, skip and look for next */
1920 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1921 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1922 else
1923 {
1924 next->flags &= ~CF_READY;
1925 --coro_nready;
1926
1927 prepare_schedule_to (aTHX_ ta, next);
1928 break;
1929 }
1930 }
1931 else
1932 {
1031 /* nothing to schedule: call the idle handler */ 1933 /* nothing to schedule: call the idle handler */
1032 if (!next_sv) 1934 if (SvROK (sv_idle)
1935 && SvOBJECT (SvRV (sv_idle)))
1936 {
1937 if (SvRV (sv_idle) == SvRV (coro_current))
1938 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1939
1940 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1941 api_ready (aTHX_ SvRV (sv_idle));
1942 --coro_nready;
1943 }
1944 else
1945 {
1946 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1947 dSP;
1948
1949 ENTER;
1950 SAVETMPS;
1951
1952 PUSHMARK (SP);
1953 PUTBACK;
1954 call_sv (sv_idle, G_VOID | G_DISCARD);
1955
1956 FREETMPS;
1957 LEAVE;
1958 }
1959 }
1960 }
1961}
1962
1963ecb_inline void
1964prepare_cede (pTHX_ struct coro_transfer_args *ta)
1965{
1966 api_ready (aTHX_ coro_current);
1967 prepare_schedule (aTHX_ ta);
1968}
1969
1970ecb_inline void
1971prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1972{
1973 SV *prev = SvRV (coro_current);
1974
1975 if (coro_nready)
1976 {
1977 prepare_schedule (aTHX_ ta);
1978 api_ready (aTHX_ prev);
1979 }
1980 else
1981 prepare_nop (aTHX_ ta);
1982}
1983
1984static void
1985api_schedule (pTHX)
1986{
1987 struct coro_transfer_args ta;
1988
1989 prepare_schedule (aTHX_ &ta);
1990 TRANSFER (ta, 1);
1991}
1992
1993static void
1994api_schedule_to (pTHX_ SV *coro_sv)
1995{
1996 struct coro_transfer_args ta;
1997 struct coro *next = SvSTATE (coro_sv);
1998
1999 SvREFCNT_inc_NN (coro_sv);
2000 prepare_schedule_to (aTHX_ &ta, next);
2001}
2002
2003static int
2004api_cede (pTHX)
2005{
2006 struct coro_transfer_args ta;
2007
2008 prepare_cede (aTHX_ &ta);
2009
2010 if (ecb_expect_true (ta.prev != ta.next))
2011 {
2012 TRANSFER (ta, 1);
2013 return 1;
2014 }
2015 else
2016 return 0;
2017}
2018
2019static int
2020api_cede_notself (pTHX)
2021{
2022 if (coro_nready)
2023 {
2024 struct coro_transfer_args ta;
2025
2026 prepare_cede_notself (aTHX_ &ta);
2027 TRANSFER (ta, 1);
2028 return 1;
2029 }
2030 else
2031 return 0;
2032}
2033
2034static void
2035api_trace (pTHX_ SV *coro_sv, int flags)
2036{
2037 struct coro *coro = SvSTATE (coro_sv);
2038
2039 if (coro->flags & CF_RUNNING)
2040 croak ("cannot enable tracing on a running coroutine, caught");
2041
2042 if (flags & CC_TRACE)
2043 {
2044 if (!coro->cctx)
2045 coro->cctx = cctx_new_run ();
2046 else if (!(coro->cctx->flags & CC_TRACE))
2047 croak ("cannot enable tracing on coroutine with custom stack, caught");
2048
2049 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2050 }
2051 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2052 {
2053 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2054
2055 if (coro->flags & CF_RUNNING)
2056 PL_runops = RUNOPS_DEFAULT;
2057 else
2058 coro->slot->runops = RUNOPS_DEFAULT;
2059 }
2060}
2061
2062static void
2063coro_push_av (pTHX_ AV *av, I32 gimme_v)
2064{
2065 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2066 {
2067 dSP;
2068
2069 if (gimme_v == G_SCALAR)
2070 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2071 else
2072 {
2073 int i;
2074 EXTEND (SP, AvFILLp (av) + 1);
2075
2076 for (i = 0; i <= AvFILLp (av); ++i)
2077 PUSHs (AvARRAY (av)[i]);
2078 }
2079
2080 PUTBACK;
2081 }
2082}
2083
2084static void
2085coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2086{
2087 if (!coro->on_destroy)
2088 coro->on_destroy = newAV ();
2089
2090 av_push (coro->on_destroy, cb);
2091}
2092
2093static void
2094slf_destroy_join (pTHX_ struct CoroSLF *frame)
2095{
2096 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2097}
2098
2099static int
2100slf_check_join (pTHX_ struct CoroSLF *frame)
2101{
2102 struct coro *coro = (struct coro *)frame->data;
2103
2104 if (!coro->status)
2105 return 1;
2106
2107 frame->destroy = 0;
2108
2109 coro_push_av (aTHX_ coro->status, GIMME_V);
2110
2111 SvREFCNT_dec ((SV *)coro->hv);
2112
2113 return 0;
2114}
2115
2116static void
2117slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2118{
2119 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2120
2121 if (items > 1)
2122 croak ("join called with too many arguments");
2123
2124 if (coro->status)
2125 frame->prepare = prepare_nop;
2126 else
2127 {
2128 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2129 frame->prepare = prepare_schedule;
2130 }
2131
2132 frame->check = slf_check_join;
2133 frame->destroy = slf_destroy_join;
2134 frame->data = (void *)coro;
2135 SvREFCNT_inc (coro->hv);
2136}
2137
2138static void
2139coro_call_on_destroy (pTHX_ struct coro *coro)
2140{
2141 AV *od = coro->on_destroy;
2142
2143 if (!od)
2144 return;
2145
2146 while (AvFILLp (od) >= 0)
2147 {
2148 SV *cb = sv_2mortal (av_pop (od));
2149
2150 /* coro hv's (and only hv's at the moment) are supported as well */
2151 if (SvSTATEhv_p (aTHX_ cb))
2152 api_ready (aTHX_ cb);
2153 else
2154 {
2155 dSP; /* don't disturb outer sp */
2156 PUSHMARK (SP);
2157
2158 if (coro->status)
2159 {
2160 PUTBACK;
2161 coro_push_av (aTHX_ coro->status, G_ARRAY);
2162 SPAGAIN;
2163 }
2164
2165 PUTBACK;
2166 call_sv (cb, G_VOID | G_DISCARD);
2167 }
2168 }
2169}
2170
2171static void
2172coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2173{
2174 AV *av;
2175
2176 if (coro->status)
2177 {
2178 av = coro->status;
2179 av_clear (av);
2180 }
2181 else
2182 av = coro->status = newAV ();
2183
2184 /* items are actually not so common, so optimise for this case */
2185 if (items)
2186 {
2187 int i;
2188
2189 av_extend (av, items - 1);
2190
2191 for (i = 0; i < items; ++i)
2192 av_push (av, SvREFCNT_inc_NN (arg [i]));
2193 }
2194}
2195
2196static void
2197slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2198{
2199 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2200 api_ready (aTHX_ sv_manager);
2201
2202 frame->prepare = prepare_schedule;
2203 frame->check = slf_check_repeat;
2204
2205 /* as a minor optimisation, we could unwind all stacks here */
2206 /* but that puts extra pressure on pp_slf, and is not worth much */
2207 /*coro_unwind_stacks (aTHX);*/
2208}
2209
2210static void
2211slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2212{
2213 HV *coro_hv = (HV *)SvRV (coro_current);
2214
2215 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2216 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2217}
2218
2219static void
2220slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2221{
2222 HV *coro_hv;
2223 struct coro *coro;
2224
2225 if (items <= 0)
2226 croak ("Coro::cancel called without coro object,");
2227
2228 coro = SvSTATE (arg [0]);
2229 coro_hv = coro->hv;
2230
2231 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2232
2233 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2234 {
2235 /* coro currently busy cancelling something, so just notify it */
2236 coro->slf_frame.data = (void *)coro;
2237
2238 frame->prepare = prepare_nop;
2239 frame->check = slf_check_nop;
2240 }
2241 else if (coro_hv == (HV *)SvRV (coro_current))
2242 {
2243 /* cancelling the current coro is allowed, and equals terminate */
2244 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2245 }
2246 else
2247 {
2248 struct coro *self = SvSTATE_current;
2249
2250 /* otherwise we cancel directly, purely for speed reasons
2251 * unfortunately, this requires some magic trickery, as
2252 * somebody else could cancel us, so we have to fight the cancellation.
2253 * this is ugly, and hopefully fully worth the extra speed.
2254 * besides, I can't get the slow-but-safe version working...
2255 */
2256 slf_frame.data = 0;
2257 self->flags |= CF_NOCANCEL;
2258 coro_state_destroy (aTHX_ coro);
2259 self->flags &= ~CF_NOCANCEL;
2260
2261 if (slf_frame.data)
2262 {
2263 /* while we were busy we have been cancelled, so terminate */
2264 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2265 }
2266 else
2267 {
2268 frame->prepare = prepare_nop;
2269 frame->check = slf_check_nop;
2270 }
2271 }
2272}
2273
2274static int
2275slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2276{
2277 frame->prepare = 0;
2278 coro_unwind_stacks (aTHX);
2279
2280 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2281
2282 return 1;
2283}
2284
2285static int
2286safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2287{
2288 if (coro->cctx)
2289 croak ("coro inside C callback, unable to cancel at this time, caught");
2290
2291 if (coro->flags & CF_NEW)
2292 {
2293 coro_set_status (aTHX_ coro, arg, items);
2294 coro_state_destroy (aTHX_ coro);
2295 }
2296 else
2297 {
2298 if (!coro->slf_frame.prepare)
2299 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2300
2301 slf_destroy (aTHX_ coro);
2302
2303 coro_set_status (aTHX_ coro, arg, items);
2304 coro->slf_frame.prepare = prepare_nop;
2305 coro->slf_frame.check = slf_check_safe_cancel;
2306
2307 api_ready (aTHX_ (SV *)coro->hv);
2308 }
2309
2310 return 1;
2311}
2312
2313/*****************************************************************************/
2314/* async pool handler */
2315
2316static int
2317slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2318{
2319 HV *hv = (HV *)SvRV (coro_current);
2320 struct coro *coro = (struct coro *)frame->data;
2321
2322 if (!coro->invoke_cb)
2323 return 1; /* loop till we have invoke */
2324 else
2325 {
2326 hv_store (hv, "desc", sizeof ("desc") - 1,
2327 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2328
2329 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2330
2331 {
2332 dSP;
2333 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2334 PUTBACK;
2335 }
2336
2337 SvREFCNT_dec (GvAV (PL_defgv));
2338 GvAV (PL_defgv) = coro->invoke_av;
2339 coro->invoke_av = 0;
2340
2341 return 0;
2342 }
2343}
2344
2345static void
2346slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2347{
2348 HV *hv = (HV *)SvRV (coro_current);
2349 struct coro *coro = SvSTATE_hv ((SV *)hv);
2350
2351 if (ecb_expect_true (coro->saved_deffh))
2352 {
2353 /* subsequent iteration */
2354 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2355 coro->saved_deffh = 0;
2356
2357 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2358 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2359 {
2360 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2361 return;
2362 }
2363 else
2364 {
2365 av_clear (GvAV (PL_defgv));
2366 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2367
2368 coro->prio = 0;
2369
2370 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2371 api_trace (aTHX_ coro_current, 0);
2372
2373 frame->prepare = prepare_schedule;
2374 av_push (av_async_pool, SvREFCNT_inc (hv));
2375 }
2376 }
2377 else
2378 {
2379 /* first iteration, simply fall through */
2380 frame->prepare = prepare_nop;
2381 }
2382
2383 frame->check = slf_check_pool_handler;
2384 frame->data = (void *)coro;
2385}
2386
2387/*****************************************************************************/
2388/* rouse callback */
2389
2390#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2391
2392static void
2393coro_rouse_callback (pTHX_ CV *cv)
2394{
2395 dXSARGS;
2396 SV *data = (SV *)S_GENSUB_ARG;
2397
2398 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2399 {
2400 /* first call, set args */
2401 SV *coro = SvRV (data);
2402 AV *av = newAV ();
2403
2404 SvRV_set (data, (SV *)av);
2405
2406 /* better take a full copy of the arguments */
2407 while (items--)
2408 av_store (av, items, newSVsv (ST (items)));
2409
2410 api_ready (aTHX_ coro);
2411 SvREFCNT_dec (coro);
2412 }
2413
2414 XSRETURN_EMPTY;
2415}
2416
2417static int
2418slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2419{
2420 SV *data = (SV *)frame->data;
2421
2422 if (CORO_THROW)
2423 return 0;
2424
2425 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2426 return 1;
2427
2428 /* now push all results on the stack */
2429 {
2430 dSP;
2431 AV *av = (AV *)SvRV (data);
2432 int i;
2433
2434 EXTEND (SP, AvFILLp (av) + 1);
2435 for (i = 0; i <= AvFILLp (av); ++i)
2436 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2437
2438 /* we have stolen the elements, so set length to zero and free */
2439 AvFILLp (av) = -1;
2440 av_undef (av);
2441
2442 PUTBACK;
2443 }
2444
2445 return 0;
2446}
2447
2448static void
2449slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2450{
2451 SV *cb;
2452
2453 if (items)
2454 cb = arg [0];
2455 else
2456 {
2457 struct coro *coro = SvSTATE_current;
2458
2459 if (!coro->rouse_cb)
2460 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2461
2462 cb = sv_2mortal (coro->rouse_cb);
2463 coro->rouse_cb = 0;
2464 }
2465
2466 if (!SvROK (cb)
2467 || SvTYPE (SvRV (cb)) != SVt_PVCV
2468 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2469 croak ("Coro::rouse_wait called with illegal callback argument,");
2470
2471 {
2472 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2473 SV *data = (SV *)S_GENSUB_ARG;
2474
2475 frame->data = (void *)data;
2476 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2477 frame->check = slf_check_rouse_wait;
2478 }
2479}
2480
2481static SV *
2482coro_new_rouse_cb (pTHX)
2483{
2484 HV *hv = (HV *)SvRV (coro_current);
2485 struct coro *coro = SvSTATE_hv (hv);
2486 SV *data = newRV_inc ((SV *)hv);
2487 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2488
2489 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2490 SvREFCNT_dec (data); /* magicext increases the refcount */
2491
2492 SvREFCNT_dec (coro->rouse_cb);
2493 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2494
2495 return cb;
2496}
2497
2498/*****************************************************************************/
2499/* schedule-like-function opcode (SLF) */
2500
2501static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2502static const CV *slf_cv;
2503static SV **slf_argv;
2504static int slf_argc, slf_arga; /* count, allocated */
2505static I32 slf_ax; /* top of stack, for restore */
2506
2507/* this restores the stack in the case we patched the entersub, to */
2508/* recreate the stack frame as perl will on following calls */
2509/* since entersub cleared the stack */
2510static OP *
2511pp_restore (pTHX)
2512{
2513 int i;
2514 SV **SP = PL_stack_base + slf_ax;
2515
2516 PUSHMARK (SP);
2517
2518 EXTEND (SP, slf_argc + 1);
2519
2520 for (i = 0; i < slf_argc; ++i)
2521 PUSHs (sv_2mortal (slf_argv [i]));
2522
2523 PUSHs ((SV *)CvGV (slf_cv));
2524
2525 RETURNOP (slf_restore.op_first);
2526}
2527
2528static void
2529slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2530{
2531 SV **arg = (SV **)slf_frame.data;
2532
2533 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2534}
2535
2536static void
2537slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2538{
2539 if (items != 2)
2540 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2541
2542 frame->prepare = slf_prepare_transfer;
2543 frame->check = slf_check_nop;
2544 frame->data = (void *)arg; /* let's hope it will stay valid */
2545}
2546
2547static void
2548slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2549{
2550 frame->prepare = prepare_schedule;
2551 frame->check = slf_check_nop;
2552}
2553
2554static void
2555slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2556{
2557 struct coro *next = (struct coro *)slf_frame.data;
2558
2559 SvREFCNT_inc_NN (next->hv);
2560 prepare_schedule_to (aTHX_ ta, next);
2561}
2562
2563static void
2564slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2565{
2566 if (!items)
2567 croak ("Coro::schedule_to expects a coroutine argument, caught");
2568
2569 frame->data = (void *)SvSTATE (arg [0]);
2570 frame->prepare = slf_prepare_schedule_to;
2571 frame->check = slf_check_nop;
2572}
2573
2574static void
2575slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2576{
2577 api_ready (aTHX_ SvRV (coro_current));
2578
2579 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2580}
2581
2582static void
2583slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2584{
2585 frame->prepare = prepare_cede;
2586 frame->check = slf_check_nop;
2587}
2588
2589static void
2590slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2591{
2592 frame->prepare = prepare_cede_notself;
2593 frame->check = slf_check_nop;
2594}
2595
2596/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2597static void
2598slf_destroy (pTHX_ struct coro *coro)
2599{
2600 /* this callback is reserved for slf functions needing to do cleanup */
2601 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2602 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2603
2604 /*
2605 * The on_destroy above most likely is from an SLF call.
2606 * Since by definition the SLF call will not finish when we destroy
2607 * the coro, we will have to force-finish it here, otherwise
2608 * cleanup functions cannot call SLF functions.
2609 */
2610 coro->slf_frame.prepare = 0;
2611}
2612
2613/*
2614 * these not obviously related functions are all rolled into one
2615 * function to increase chances that they all will call transfer with the same
2616 * stack offset
2617 * SLF stands for "schedule-like-function".
2618 */
2619static OP *
2620pp_slf (pTHX)
2621{
2622 I32 checkmark; /* mark SP to see how many elements check has pushed */
2623
2624 /* set up the slf frame, unless it has already been set-up */
2625 /* the latter happens when a new coro has been started */
2626 /* or when a new cctx was attached to an existing coroutine */
2627 if (ecb_expect_true (!slf_frame.prepare))
2628 {
2629 /* first iteration */
2630 dSP;
2631 SV **arg = PL_stack_base + TOPMARK + 1;
2632 int items = SP - arg; /* args without function object */
2633 SV *gv = *sp;
2634
2635 /* do a quick consistency check on the "function" object, and if it isn't */
2636 /* for us, divert to the real entersub */
2637 if (SvTYPE (gv) != SVt_PVGV
2638 || !GvCV (gv)
2639 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2640 return PL_ppaddr[OP_ENTERSUB](aTHX);
2641
2642 if (!(PL_op->op_flags & OPf_STACKED))
2643 {
2644 /* ampersand-form of call, use @_ instead of stack */
2645 AV *av = GvAV (PL_defgv);
2646 arg = AvARRAY (av);
2647 items = AvFILLp (av) + 1;
2648 }
2649
2650 /* now call the init function, which needs to set up slf_frame */
2651 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2652 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2653
2654 /* pop args */
2655 SP = PL_stack_base + POPMARK;
2656
2657 PUTBACK;
2658 }
2659
2660 /* now that we have a slf_frame, interpret it! */
2661 /* we use a callback system not to make the code needlessly */
2662 /* complicated, but so we can run multiple perl coros from one cctx */
2663
2664 do
2665 {
2666 struct coro_transfer_args ta;
2667
2668 slf_frame.prepare (aTHX_ &ta);
2669 TRANSFER (ta, 0);
2670
2671 checkmark = PL_stack_sp - PL_stack_base;
2672 }
2673 while (slf_frame.check (aTHX_ &slf_frame));
2674
2675 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2676
2677 /* exception handling */
2678 if (ecb_expect_false (CORO_THROW))
2679 {
2680 SV *exception = sv_2mortal (CORO_THROW);
2681
2682 CORO_THROW = 0;
2683 sv_setsv (ERRSV, exception);
2684 croak (0);
2685 }
2686
2687 /* return value handling - mostly like entersub */
2688 /* make sure we put something on the stack in scalar context */
2689 if (GIMME_V == G_SCALAR
2690 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2691 {
2692 dSP;
2693 SV **bot = PL_stack_base + checkmark;
2694
2695 if (sp == bot) /* too few, push undef */
2696 bot [1] = &PL_sv_undef;
2697 else /* too many, take last one */
2698 bot [1] = *sp;
2699
2700 SP = bot + 1;
2701
2702 PUTBACK;
2703 }
2704
2705 return NORMAL;
2706}
2707
2708static void
2709api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2710{
2711 int i;
2712 SV **arg = PL_stack_base + ax;
2713 int items = PL_stack_sp - arg + 1;
2714
2715 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2716
2717 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2718 && PL_op->op_ppaddr != pp_slf)
2719 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2720
2721 CvFLAGS (cv) |= CVf_SLF;
2722 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2723 slf_cv = cv;
2724
2725 /* we patch the op, and then re-run the whole call */
2726 /* we have to put the same argument on the stack for this to work */
2727 /* and this will be done by pp_restore */
2728 slf_restore.op_next = (OP *)&slf_restore;
2729 slf_restore.op_type = OP_CUSTOM;
2730 slf_restore.op_ppaddr = pp_restore;
2731 slf_restore.op_first = PL_op;
2732
2733 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2734
2735 if (PL_op->op_flags & OPf_STACKED)
2736 {
2737 if (items > slf_arga)
2738 {
2739 slf_arga = items;
2740 Safefree (slf_argv);
2741 New (0, slf_argv, slf_arga, SV *);
2742 }
2743
2744 slf_argc = items;
2745
2746 for (i = 0; i < items; ++i)
2747 slf_argv [i] = SvREFCNT_inc (arg [i]);
2748 }
2749 else
2750 slf_argc = 0;
2751
2752 PL_op->op_ppaddr = pp_slf;
2753 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2754
2755 PL_op = (OP *)&slf_restore;
2756}
2757
2758/*****************************************************************************/
2759/* dynamic wind */
2760
2761static void
2762on_enterleave_call (pTHX_ SV *cb)
2763{
2764 dSP;
2765
2766 PUSHSTACK;
2767
2768 PUSHMARK (SP);
2769 PUTBACK;
2770 call_sv (cb, G_VOID | G_DISCARD);
2771 SPAGAIN;
2772
2773 POPSTACK;
2774}
2775
2776static SV *
2777coro_avp_pop_and_free (pTHX_ AV **avp)
2778{
2779 AV *av = *avp;
2780 SV *res = av_pop (av);
2781
2782 if (AvFILLp (av) < 0)
2783 {
2784 *avp = 0;
2785 SvREFCNT_dec (av);
2786 }
2787
2788 return res;
2789}
2790
2791static void
2792coro_pop_on_enter (pTHX_ void *coro)
2793{
2794 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2795 SvREFCNT_dec (cb);
2796}
2797
2798static void
2799coro_pop_on_leave (pTHX_ void *coro)
2800{
2801 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2802 on_enterleave_call (aTHX_ sv_2mortal (cb));
2803}
2804
2805/*****************************************************************************/
2806/* PerlIO::cede */
2807
2808typedef struct
2809{
2810 PerlIOBuf base;
2811 NV next, every;
2812} PerlIOCede;
2813
2814static IV ecb_cold
2815PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2816{
2817 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2818
2819 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2820 self->next = nvtime () + self->every;
2821
2822 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2823}
2824
2825static SV * ecb_cold
2826PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2827{
2828 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2829
2830 return newSVnv (self->every);
2831}
2832
2833static IV
2834PerlIOCede_flush (pTHX_ PerlIO *f)
2835{
2836 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2837 double now = nvtime ();
2838
2839 if (now >= self->next)
2840 {
2841 api_cede (aTHX);
2842 self->next = now + self->every;
2843 }
2844
2845 return PerlIOBuf_flush (aTHX_ f);
2846}
2847
2848static PerlIO_funcs PerlIO_cede =
2849{
2850 sizeof(PerlIO_funcs),
2851 "cede",
2852 sizeof(PerlIOCede),
2853 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2854 PerlIOCede_pushed,
2855 PerlIOBuf_popped,
2856 PerlIOBuf_open,
2857 PerlIOBase_binmode,
2858 PerlIOCede_getarg,
2859 PerlIOBase_fileno,
2860 PerlIOBuf_dup,
2861 PerlIOBuf_read,
2862 PerlIOBuf_unread,
2863 PerlIOBuf_write,
2864 PerlIOBuf_seek,
2865 PerlIOBuf_tell,
2866 PerlIOBuf_close,
2867 PerlIOCede_flush,
2868 PerlIOBuf_fill,
2869 PerlIOBase_eof,
2870 PerlIOBase_error,
2871 PerlIOBase_clearerr,
2872 PerlIOBase_setlinebuf,
2873 PerlIOBuf_get_base,
2874 PerlIOBuf_bufsiz,
2875 PerlIOBuf_get_ptr,
2876 PerlIOBuf_get_cnt,
2877 PerlIOBuf_set_ptrcnt,
2878};
2879
2880/*****************************************************************************/
2881/* Coro::Semaphore & Coro::Signal */
2882
2883static SV *
2884coro_waitarray_new (pTHX_ int count)
2885{
2886 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2887 AV *av = newAV ();
2888 SV **ary;
2889
2890 /* unfortunately, building manually saves memory */
2891 Newx (ary, 2, SV *);
2892 AvALLOC (av) = ary;
2893#if PERL_VERSION_ATLEAST (5,10,0)
2894 AvARRAY (av) = ary;
2895#else
2896 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2897 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2898 SvPVX ((SV *)av) = (char *)ary;
2899#endif
2900 AvMAX (av) = 1;
2901 AvFILLp (av) = 0;
2902 ary [0] = newSViv (count);
2903
2904 return newRV_noinc ((SV *)av);
2905}
2906
2907/* semaphore */
2908
2909static void
2910coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2911{
2912 SV *count_sv = AvARRAY (av)[0];
2913 IV count = SvIVX (count_sv);
2914
2915 count += adjust;
2916 SvIVX (count_sv) = count;
2917
2918 /* now wake up as many waiters as are expected to lock */
2919 while (count > 0 && AvFILLp (av) > 0)
2920 {
2921 SV *cb;
2922
2923 /* swap first two elements so we can shift a waiter */
2924 AvARRAY (av)[0] = AvARRAY (av)[1];
2925 AvARRAY (av)[1] = count_sv;
2926 cb = av_shift (av);
2927
2928 if (SvOBJECT (cb))
2929 {
2930 api_ready (aTHX_ cb);
2931 --count;
2932 }
2933 else if (SvTYPE (cb) == SVt_PVCV)
1033 { 2934 {
1034 dSP; 2935 dSP;
1035 UNLOCK;
1036
1037 ENTER;
1038 SAVETMPS;
1039
1040 PUSHMARK (SP); 2936 PUSHMARK (SP);
2937 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1041 PUTBACK; 2938 PUTBACK;
1042 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 2939 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1043
1044 FREETMPS;
1045 LEAVE;
1046 continue;
1047 } 2940 }
1048 2941
1049 ta->next = SvSTATE (next_sv); 2942 SvREFCNT_dec (cb);
2943 }
2944}
1050 2945
1051 /* cannot transfer to destroyed coros, skip and look for next */ 2946static void
1052 if (ta->next->flags & CF_DESTROYED) 2947coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2948{
2949 /* call $sem->adjust (0) to possibly wake up some other waiters */
2950 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2951}
2952
2953static int
2954slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2955{
2956 AV *av = (AV *)frame->data;
2957 SV *count_sv = AvARRAY (av)[0];
2958 SV *coro_hv = SvRV (coro_current);
2959
2960 /* if we are about to throw, don't actually acquire the lock, just throw */
2961 if (CORO_THROW)
2962 return 0;
2963 else if (SvIVX (count_sv) > 0)
2964 {
2965 frame->destroy = 0;
2966
2967 if (acquire)
2968 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2969 else
2970 coro_semaphore_adjust (aTHX_ av, 0);
2971
2972 return 0;
2973 }
2974 else
2975 {
2976 int i;
2977 /* if we were woken up but can't down, we look through the whole */
2978 /* waiters list and only add us if we aren't in there already */
2979 /* this avoids some degenerate memory usage cases */
2980 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
2981 if (AvARRAY (av)[i] == coro_hv)
2982 return 1;
2983
2984 av_push (av, SvREFCNT_inc (coro_hv));
2985 return 1;
2986 }
2987}
2988
2989static int
2990slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2991{
2992 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2993}
2994
2995static int
2996slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2997{
2998 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2999}
3000
3001static void
3002slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3003{
3004 AV *av = (AV *)SvRV (arg [0]);
3005
3006 if (SvIVX (AvARRAY (av)[0]) > 0)
3007 {
3008 frame->data = (void *)av;
3009 frame->prepare = prepare_nop;
3010 }
3011 else
3012 {
3013 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3014
3015 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3016 frame->prepare = prepare_schedule;
3017 /* to avoid race conditions when a woken-up coro gets terminated */
3018 /* we arrange for a temporary on_destroy that calls adjust (0) */
3019 frame->destroy = coro_semaphore_destroy;
3020 }
3021}
3022
3023static void
3024slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3025{
3026 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3027 frame->check = slf_check_semaphore_down;
3028}
3029
3030static void
3031slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3032{
3033 if (items >= 2)
3034 {
3035 /* callback form */
3036 AV *av = (AV *)SvRV (arg [0]);
3037 SV *cb_cv = s_get_cv_croak (arg [1]);
3038
3039 av_push (av, SvREFCNT_inc_NN (cb_cv));
3040
3041 if (SvIVX (AvARRAY (av)[0]) > 0)
3042 coro_semaphore_adjust (aTHX_ av, 0);
3043
3044 frame->prepare = prepare_nop;
3045 frame->check = slf_check_nop;
3046 }
3047 else
3048 {
3049 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3050 frame->check = slf_check_semaphore_wait;
3051 }
3052}
3053
3054/* signal */
3055
3056static void
3057coro_signal_wake (pTHX_ AV *av, int count)
3058{
3059 SvIVX (AvARRAY (av)[0]) = 0;
3060
3061 /* now signal count waiters */
3062 while (count > 0 && AvFILLp (av) > 0)
3063 {
3064 SV *cb;
3065
3066 /* swap first two elements so we can shift a waiter */
3067 cb = AvARRAY (av)[0];
3068 AvARRAY (av)[0] = AvARRAY (av)[1];
3069 AvARRAY (av)[1] = cb;
3070
3071 cb = av_shift (av);
3072
3073 if (SvTYPE (cb) == SVt_PVCV)
1053 { 3074 {
3075 dSP;
3076 PUSHMARK (SP);
3077 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1054 UNLOCK; 3078 PUTBACK;
1055 SvREFCNT_dec (next_sv); 3079 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1056 /* coro_nready is already taken care of by destroy */
1057 continue;
1058 } 3080 }
3081 else
3082 {
3083 api_ready (aTHX_ cb);
3084 sv_setiv (cb, 0); /* signal waiter */
3085 }
1059 3086
1060 --coro_nready; 3087 SvREFCNT_dec (cb);
1061 UNLOCK;
1062 break;
1063 }
1064 3088
1065 /* free this only after the transfer */ 3089 --count;
1066 prev_sv = SvRV (coro_current); 3090 }
1067 SvRV_set (coro_current, next_sv);
1068 ta->prev = SvSTATE (prev_sv);
1069
1070 assert (ta->next->flags & CF_READY);
1071 ta->next->flags &= ~CF_READY;
1072
1073 LOCK;
1074 free_coro_mortal ();
1075 coro_mortal = prev_sv;
1076 UNLOCK;
1077}
1078
1079static void
1080prepare_cede (struct transfer_args *ta)
1081{
1082 api_ready (coro_current);
1083 prepare_schedule (ta);
1084} 3091}
1085 3092
1086static int 3093static int
1087prepare_cede_notself (struct transfer_args *ta) 3094slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
1088{ 3095{
1089 if (coro_nready) 3096 /* if we are about to throw, also stop waiting */
3097 return SvROK ((SV *)frame->data) && !CORO_THROW;
3098}
3099
3100static void
3101slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3102{
3103 AV *av = (AV *)SvRV (arg [0]);
3104
3105 if (items >= 2)
3106 {
3107 SV *cb_cv = s_get_cv_croak (arg [1]);
3108 av_push (av, SvREFCNT_inc_NN (cb_cv));
3109
3110 if (SvIVX (AvARRAY (av)[0]))
3111 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3112
3113 frame->prepare = prepare_nop;
3114 frame->check = slf_check_nop;
1090 { 3115 }
1091 SV *prev = SvRV (coro_current); 3116 else if (SvIVX (AvARRAY (av)[0]))
1092 prepare_schedule (ta); 3117 {
1093 api_ready (prev); 3118 SvIVX (AvARRAY (av)[0]) = 0;
1094 return 1; 3119 frame->prepare = prepare_nop;
3120 frame->check = slf_check_nop;
1095 } 3121 }
1096 else 3122 else
3123 {
3124 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3125
3126 av_push (av, waiter);
3127
3128 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3129 frame->prepare = prepare_schedule;
3130 frame->check = slf_check_signal_wait;
3131 }
3132}
3133
3134/*****************************************************************************/
3135/* Coro::AIO */
3136
3137#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3138
3139/* helper storage struct */
3140struct io_state
3141{
3142 int errorno;
3143 I32 laststype; /* U16 in 5.10.0 */
3144 int laststatval;
3145 Stat_t statcache;
3146};
3147
3148static void
3149coro_aio_callback (pTHX_ CV *cv)
3150{
3151 dXSARGS;
3152 AV *state = (AV *)S_GENSUB_ARG;
3153 SV *coro = av_pop (state);
3154 SV *data_sv = newSV (sizeof (struct io_state));
3155
3156 av_extend (state, items - 1);
3157
3158 sv_upgrade (data_sv, SVt_PV);
3159 SvCUR_set (data_sv, sizeof (struct io_state));
3160 SvPOK_only (data_sv);
3161
3162 {
3163 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3164
3165 data->errorno = errno;
3166 data->laststype = PL_laststype;
3167 data->laststatval = PL_laststatval;
3168 data->statcache = PL_statcache;
3169 }
3170
3171 /* now build the result vector out of all the parameters and the data_sv */
3172 {
3173 int i;
3174
3175 for (i = 0; i < items; ++i)
3176 av_push (state, SvREFCNT_inc_NN (ST (i)));
3177 }
3178
3179 av_push (state, data_sv);
3180
3181 api_ready (aTHX_ coro);
3182 SvREFCNT_dec (coro);
3183 SvREFCNT_dec ((AV *)state);
3184}
3185
3186static int
3187slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3188{
3189 AV *state = (AV *)frame->data;
3190
3191 /* if we are about to throw, return early */
3192 /* this does not cancel the aio request, but at least */
3193 /* it quickly returns */
3194 if (CORO_THROW)
1097 return 0; 3195 return 0;
1098}
1099 3196
1100static void 3197 /* one element that is an RV? repeat! */
1101api_schedule (void) 3198 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
1102{
1103 struct transfer_args ta;
1104
1105 prepare_schedule (&ta);
1106 TRANSFER (ta);
1107}
1108
1109static int
1110api_cede (void)
1111{
1112 struct transfer_args ta;
1113
1114 prepare_cede (&ta);
1115
1116 if (ta.prev != ta.next)
1117 {
1118 TRANSFER (ta);
1119 return 1; 3199 return 1;
3200
3201 /* restore status */
3202 {
3203 SV *data_sv = av_pop (state);
3204 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3205
3206 errno = data->errorno;
3207 PL_laststype = data->laststype;
3208 PL_laststatval = data->laststatval;
3209 PL_statcache = data->statcache;
3210
3211 SvREFCNT_dec (data_sv);
1120 } 3212 }
1121 else 3213
3214 /* push result values */
3215 {
3216 dSP;
3217 int i;
3218
3219 EXTEND (SP, AvFILLp (state) + 1);
3220 for (i = 0; i <= AvFILLp (state); ++i)
3221 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3222
3223 PUTBACK;
3224 }
3225
1122 return 0; 3226 return 0;
1123} 3227}
1124 3228
1125static int 3229static void
1126api_cede_notself (void) 3230slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1127{ 3231{
1128 struct transfer_args ta; 3232 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3233 SV *coro_hv = SvRV (coro_current);
3234 struct coro *coro = SvSTATE_hv (coro_hv);
1129 3235
1130 if (prepare_cede_notself (&ta)) 3236 /* put our coroutine id on the state arg */
1131 { 3237 av_push (state, SvREFCNT_inc_NN (coro_hv));
1132 TRANSFER (ta); 3238
1133 return 1; 3239 /* first see whether we have a non-zero priority and set it as AIO prio */
3240 if (coro->prio)
1134 } 3241 {
1135 else 3242 dSP;
1136 return 0;
1137}
1138 3243
3244 static SV *prio_cv;
3245 static SV *prio_sv;
3246
3247 if (ecb_expect_false (!prio_cv))
3248 {
3249 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3250 prio_sv = newSViv (0);
3251 }
3252
3253 PUSHMARK (SP);
3254 sv_setiv (prio_sv, coro->prio);
3255 XPUSHs (prio_sv);
3256
3257 PUTBACK;
3258 call_sv (prio_cv, G_VOID | G_DISCARD);
3259 }
3260
3261 /* now call the original request */
3262 {
3263 dSP;
3264 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3265 int i;
3266
3267 PUSHMARK (SP);
3268
3269 /* first push all args to the stack */
3270 EXTEND (SP, items + 1);
3271
3272 for (i = 0; i < items; ++i)
3273 PUSHs (arg [i]);
3274
3275 /* now push the callback closure */
3276 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3277
3278 /* now call the AIO function - we assume our request is uncancelable */
3279 PUTBACK;
3280 call_sv ((SV *)req, G_VOID | G_DISCARD);
3281 }
3282
3283 /* now that the request is going, we loop till we have a result */
3284 frame->data = (void *)state;
3285 frame->prepare = prepare_schedule;
3286 frame->check = slf_check_aio_req;
3287}
3288
3289static void
3290coro_aio_req_xs (pTHX_ CV *cv)
3291{
3292 dXSARGS;
3293
3294 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3295
3296 XSRETURN_EMPTY;
3297}
3298
3299/*****************************************************************************/
3300
3301#if CORO_CLONE
3302# include "clone.c"
3303#endif
3304
3305/*****************************************************************************/
3306
3307static SV *
3308coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3309{
3310 SV *coro_sv;
3311 struct coro *coro;
3312 MAGIC *mg;
3313 HV *hv;
3314 SV *cb;
3315 int i;
3316
3317 if (argc > 0)
3318 {
3319 cb = s_get_cv_croak (argv [0]);
3320
3321 if (!is_coro)
3322 {
3323 if (CvISXSUB (cb))
3324 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3325
3326 if (!CvROOT (cb))
3327 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3328 }
3329 }
3330
3331 Newz (0, coro, 1, struct coro);
3332 coro->args = newAV ();
3333 coro->flags = CF_NEW;
3334
3335 if (coro_first) coro_first->prev = coro;
3336 coro->next = coro_first;
3337 coro_first = coro;
3338
3339 coro->hv = hv = newHV ();
3340 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3341 mg->mg_flags |= MGf_DUP;
3342 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3343
3344 if (argc > 0)
3345 {
3346 av_extend (coro->args, argc + is_coro - 1);
3347
3348 if (is_coro)
3349 {
3350 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3351 cb = (SV *)cv_coro_run;
3352 }
3353
3354 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3355
3356 for (i = 1; i < argc; i++)
3357 av_push (coro->args, newSVsv (argv [i]));
3358 }
3359
3360 return coro_sv;
3361}
3362
3363#ifndef __cplusplus
3364ecb_cold XS(boot_Coro__State);
3365#endif
3366
3367#if CORO_JIT
3368
3369static void ecb_noinline ecb_cold
3370pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3371{
3372 dSP;
3373 AV *av = newAV ();
3374
3375 av_store (av, 3, newSVuv (d));
3376 av_store (av, 2, newSVuv (c));
3377 av_store (av, 1, newSVuv (b));
3378 av_store (av, 0, newSVuv (a));
3379
3380 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3381
3382 PUTBACK;
3383}
3384
3385static void ecb_noinline ecb_cold
3386jit_init (pTHX)
3387{
3388 dSP;
3389 SV *load, *save;
3390 char *map_base;
3391 char *load_ptr, *save_ptr;
3392 STRLEN load_len, save_len, map_len;
3393 int count;
3394
3395 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3396
3397 PUSHMARK (SP);
3398#define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3399# include "state.h"
3400#undef VARx
3401 count = call_pv ("Coro::State::_jit", G_ARRAY);
3402 SPAGAIN;
3403
3404 save = POPs; save_ptr = SvPVbyte (save, save_len);
3405 load = POPs; load_ptr = SvPVbyte (load, load_len);
3406
3407 map_len = load_len + save_len + 16;
3408
3409 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3410
3411 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3412
3413 load_perl_slots = (load_save_perl_slots_type)map_base;
3414 memcpy (map_base, load_ptr, load_len);
3415
3416 map_base += (load_len + 15) & ~15;
3417
3418 save_perl_slots = (load_save_perl_slots_type)map_base;
3419 memcpy (map_base, save_ptr, save_len);
3420
3421 /* we are good citizens and try to make the page read-only, so the evil evil */
3422 /* hackers might have it a bit more difficult */
3423 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3424
3425 PUTBACK;
3426 eval_pv ("undef &Coro::State::_jit", 1);
3427}
3428
3429#endif
3430
1139MODULE = Coro::State PACKAGE = Coro::State 3431MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1140 3432
1141PROTOTYPES: DISABLE 3433PROTOTYPES: DISABLE
1142 3434
1143BOOT: 3435BOOT:
1144{ 3436{
1145#ifdef USE_ITHREADS 3437#ifdef USE_ITHREADS
1146 MUTEX_INIT (&coro_mutex); 3438# if CORO_PTHREAD
3439 coro_thx = PERL_GET_CONTEXT;
3440# endif
1147#endif 3441#endif
1148 BOOT_PAGESIZE; 3442 BOOT_PAGESIZE;
1149 3443
3444 /* perl defines these to check for existance first, but why it doesn't */
3445 /* just create them one at init time is not clear to me, except for */
3446 /* programs trying to delete them, but... */
3447 /* anyway, we declare this as invalid and make sure they are initialised here */
3448 DEFSV;
3449 ERRSV;
3450
3451 cctx_current = cctx_new_empty ();
3452
3453 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3454 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3455
3456 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3457 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3458 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3459
3460 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3461 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3462 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3463
1150 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3464 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1151 3465
3466 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
3467 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1152 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 3468 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1153 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1154 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1155 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1156 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 3469 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1157 3470
1158 main_mainstack = PL_mainstack; 3471 main_mainstack = PL_mainstack;
3472 main_top_env = PL_top_env;
1159 3473
3474 while (main_top_env->je_prev)
3475 main_top_env = main_top_env->je_prev;
3476
3477 {
3478 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3479
3480 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3481 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3482
3483 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3484 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3485 }
3486
1160 coroapi.ver = CORO_API_VERSION; 3487 coroapi.ver = CORO_API_VERSION;
3488 coroapi.rev = CORO_API_REVISION;
3489
1161 coroapi.transfer = api_transfer; 3490 coroapi.transfer = api_transfer;
1162 3491
3492 coroapi.sv_state = SvSTATE_;
3493 coroapi.execute_slf = api_execute_slf;
3494 coroapi.prepare_nop = prepare_nop;
3495 coroapi.prepare_schedule = prepare_schedule;
3496 coroapi.prepare_cede = prepare_cede;
3497 coroapi.prepare_cede_notself = prepare_cede_notself;
3498
3499 time_init (aTHX);
3500
1163 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3501 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3502#if CORO_JIT
3503 PUTBACK;
3504 jit_init (aTHX);
3505 SPAGAIN;
3506#endif
1164} 3507}
1165 3508
1166SV * 3509SV *
1167new (char *klass, ...) 3510new (SV *klass, ...)
3511 ALIAS:
3512 Coro::new = 1
1168 CODE: 3513 CODE:
1169{ 3514 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1170 struct coro *coro;
1171 HV *hv;
1172 int i;
1173
1174 Newz (0, coro, 1, struct coro);
1175 coro->args = newAV ();
1176 coro->save = CORO_SAVE_ALL;
1177 coro->flags = CF_NEW;
1178
1179 hv = newHV ();
1180 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1181 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1182
1183 for (i = 1; i < items; i++)
1184 av_push (coro->args, newSVsv (ST (i)));
1185}
1186 OUTPUT:
1187 RETVAL
1188
1189int
1190save (SV *coro, int new_save = -1)
1191 CODE:
1192 RETVAL = api_save (coro, new_save);
1193 OUTPUT: 3515 OUTPUT:
1194 RETVAL 3516 RETVAL
1195 3517
1196void 3518void
1197_set_stacklevel (...) 3519transfer (...)
1198 ALIAS: 3520 PROTOTYPE: $$
1199 Coro::State::transfer = 1
1200 Coro::schedule = 2
1201 Coro::cede = 3
1202 Coro::cede_notself = 4
1203 CODE:
1204{
1205 struct transfer_args ta;
1206
1207 switch (ix)
1208 {
1209 case 0:
1210 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1211 ta.next = 0;
1212 break;
1213
1214 case 1:
1215 if (items != 2)
1216 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1217
1218 prepare_transfer (&ta, ST (0), ST (1));
1219 break;
1220
1221 case 2:
1222 prepare_schedule (&ta);
1223 break;
1224
1225 case 3:
1226 prepare_cede (&ta);
1227 break;
1228
1229 case 4:
1230 if (!prepare_cede_notself (&ta))
1231 XSRETURN_EMPTY;
1232
1233 break;
1234 }
1235
1236 BARRIER;
1237 TRANSFER (ta);
1238
1239 if (GIMME_V != G_VOID && ta.next != ta.prev)
1240 XSRETURN_YES;
1241}
1242
1243bool
1244_destroy (SV *coro_sv)
1245 CODE: 3521 CODE:
1246 RETVAL = coro_state_destroy (SvSTATE (coro_sv)); 3522 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1247 OUTPUT:
1248 RETVAL
1249 3523
1250void 3524void
1251_exit (code) 3525_exit (int code)
1252 int code
1253 PROTOTYPE: $ 3526 PROTOTYPE: $
1254 CODE: 3527 CODE:
1255 _exit (code); 3528 _exit (code);
1256 3529
3530SV *
3531clone (Coro::State coro)
3532 CODE:
3533{
3534#if CORO_CLONE
3535 struct coro *ncoro = coro_clone (aTHX_ coro);
3536 MAGIC *mg;
3537 /* TODO: too much duplication */
3538 ncoro->hv = newHV ();
3539 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3540 mg->mg_flags |= MGf_DUP;
3541 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3542#else
3543 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3544#endif
3545}
3546 OUTPUT:
3547 RETVAL
3548
1257int 3549int
1258cctx_stacksize (int new_stacksize = 0) 3550cctx_stacksize (int new_stacksize = 0)
3551 PROTOTYPE: ;$
1259 CODE: 3552 CODE:
1260 RETVAL = coro_stacksize; 3553 RETVAL = cctx_stacksize;
1261 if (new_stacksize) 3554 if (new_stacksize)
3555 {
1262 coro_stacksize = new_stacksize; 3556 cctx_stacksize = new_stacksize;
3557 ++cctx_gen;
3558 }
1263 OUTPUT: 3559 OUTPUT:
1264 RETVAL 3560 RETVAL
1265 3561
1266int 3562int
3563cctx_max_idle (int max_idle = 0)
3564 PROTOTYPE: ;$
3565 CODE:
3566 RETVAL = cctx_max_idle;
3567 if (max_idle > 1)
3568 cctx_max_idle = max_idle;
3569 OUTPUT:
3570 RETVAL
3571
3572int
1267cctx_count () 3573cctx_count ()
3574 PROTOTYPE:
1268 CODE: 3575 CODE:
1269 RETVAL = cctx_count; 3576 RETVAL = cctx_count;
1270 OUTPUT: 3577 OUTPUT:
1271 RETVAL 3578 RETVAL
1272 3579
1273int 3580int
1274cctx_idle () 3581cctx_idle ()
3582 PROTOTYPE:
1275 CODE: 3583 CODE:
1276 RETVAL = cctx_idle; 3584 RETVAL = cctx_idle;
1277 OUTPUT: 3585 OUTPUT:
1278 RETVAL 3586 RETVAL
1279 3587
3588void
3589list ()
3590 PROTOTYPE:
3591 PPCODE:
3592{
3593 struct coro *coro;
3594 for (coro = coro_first; coro; coro = coro->next)
3595 if (coro->hv)
3596 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3597}
3598
3599void
3600call (Coro::State coro, SV *coderef)
3601 ALIAS:
3602 eval = 1
3603 CODE:
3604{
3605 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3606 {
3607 struct coro *current = SvSTATE_current;
3608 struct CoroSLF slf_save;
3609
3610 if (current != coro)
3611 {
3612 PUTBACK;
3613 save_perl (aTHX_ current);
3614 load_perl (aTHX_ coro);
3615 /* the coro is most likely in an active SLF call.
3616 * while not strictly required (the code we execute is
3617 * not allowed to call any SLF functions), it's cleaner
3618 * to reinitialise the slf_frame and restore it later.
3619 * This might one day allow us to actually do SLF calls
3620 * from code executed here.
3621 */
3622 slf_save = slf_frame;
3623 slf_frame.prepare = 0;
3624 SPAGAIN;
3625 }
3626
3627 PUSHSTACK;
3628
3629 PUSHMARK (SP);
3630 PUTBACK;
3631
3632 if (ix)
3633 eval_sv (coderef, 0);
3634 else
3635 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3636
3637 POPSTACK;
3638 SPAGAIN;
3639
3640 if (current != coro)
3641 {
3642 PUTBACK;
3643 slf_frame = slf_save;
3644 save_perl (aTHX_ coro);
3645 load_perl (aTHX_ current);
3646 SPAGAIN;
3647 }
3648 }
3649}
3650
3651SV *
3652is_ready (Coro::State coro)
3653 PROTOTYPE: $
3654 ALIAS:
3655 is_ready = CF_READY
3656 is_running = CF_RUNNING
3657 is_new = CF_NEW
3658 is_destroyed = CF_ZOMBIE
3659 is_zombie = CF_ZOMBIE
3660 is_suspended = CF_SUSPENDED
3661 CODE:
3662 RETVAL = boolSV (coro->flags & ix);
3663 OUTPUT:
3664 RETVAL
3665
3666void
3667throw (Coro::State self, SV *exception = &PL_sv_undef)
3668 PROTOTYPE: $;$
3669 CODE:
3670{
3671 struct coro *current = SvSTATE_current;
3672 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
3673 SvREFCNT_dec (*exceptionp);
3674 SvGETMAGIC (exception);
3675 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3676}
3677
3678void
3679api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3680 PROTOTYPE: $;$
3681 C_ARGS: aTHX_ coro, flags
3682
3683SV *
3684has_cctx (Coro::State coro)
3685 PROTOTYPE: $
3686 CODE:
3687 /* maybe manage the running flag differently */
3688 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3689 OUTPUT:
3690 RETVAL
3691
3692int
3693is_traced (Coro::State coro)
3694 PROTOTYPE: $
3695 CODE:
3696 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3697 OUTPUT:
3698 RETVAL
3699
3700UV
3701rss (Coro::State coro)
3702 PROTOTYPE: $
3703 ALIAS:
3704 usecount = 1
3705 CODE:
3706 switch (ix)
3707 {
3708 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3709 case 1: RETVAL = coro->usecount; break;
3710 }
3711 OUTPUT:
3712 RETVAL
3713
3714void
3715force_cctx ()
3716 PROTOTYPE:
3717 CODE:
3718 cctx_current->idle_sp = 0;
3719
3720void
3721swap_defsv (Coro::State self)
3722 PROTOTYPE: $
3723 ALIAS:
3724 swap_defav = 1
3725 CODE:
3726 if (!self->slot)
3727 croak ("cannot swap state with coroutine that has no saved state,");
3728 else
3729 {
3730 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3731 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3732
3733 SV *tmp = *src; *src = *dst; *dst = tmp;
3734 }
3735
3736void
3737cancel (Coro::State self)
3738 CODE:
3739 coro_state_destroy (aTHX_ self);
3740
3741SV *
3742enable_times (int enabled = enable_times)
3743 CODE:
3744{
3745 RETVAL = boolSV (enable_times);
3746
3747 if (enabled != enable_times)
3748 {
3749 enable_times = enabled;
3750
3751 coro_times_update ();
3752 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3753 }
3754}
3755 OUTPUT:
3756 RETVAL
3757
3758void
3759times (Coro::State self)
3760 PPCODE:
3761{
3762 struct coro *current = SvSTATE (coro_current);
3763
3764 if (ecb_expect_false (current == self))
3765 {
3766 coro_times_update ();
3767 coro_times_add (SvSTATE (coro_current));
3768 }
3769
3770 EXTEND (SP, 2);
3771 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3772 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3773
3774 if (ecb_expect_false (current == self))
3775 coro_times_sub (SvSTATE (coro_current));
3776}
3777
3778void
3779swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3780 CODE:
3781{
3782 struct coro *current = SvSTATE_current;
3783
3784 if (current == coro)
3785 SWAP_SVS (current);
3786
3787 if (!coro->swap_sv)
3788 coro->swap_sv = newAV ();
3789
3790 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3791 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3792
3793 if (current == coro)
3794 SWAP_SVS (current);
3795}
3796
3797
1280MODULE = Coro::State PACKAGE = Coro 3798MODULE = Coro::State PACKAGE = Coro
1281 3799
1282BOOT: 3800BOOT:
1283{ 3801{
1284 int i; 3802 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3803 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3804 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3805 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3806 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3807 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3808 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3809 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1285 3810
3811 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3812 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3813 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3814 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3815
1286 coro_stash = gv_stashpv ("Coro", TRUE); 3816 coro_stash = gv_stashpv ("Coro", TRUE);
1287 3817
1288 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3818 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1289 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3819 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1290 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3820 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1291 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3821 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1292 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3822 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1293 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3823 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1294
1295 coro_current = get_sv ("Coro::current", FALSE);
1296 SvREADONLY_on (coro_current);
1297
1298 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1299 coro_ready[i] = newAV ();
1300 3824
1301 { 3825 {
1302 SV *sv = perl_get_sv("Coro::API", 1); 3826 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1303 3827
1304 coroapi.schedule = api_schedule; 3828 coroapi.schedule = api_schedule;
1305 coroapi.save = api_save; 3829 coroapi.schedule_to = api_schedule_to;
1306 coroapi.cede = api_cede; 3830 coroapi.cede = api_cede;
1307 coroapi.cede_notself = api_cede_notself; 3831 coroapi.cede_notself = api_cede_notself;
1308 coroapi.ready = api_ready; 3832 coroapi.ready = api_ready;
1309 coroapi.is_ready = api_is_ready; 3833 coroapi.is_ready = api_is_ready;
1310 coroapi.nready = &coro_nready; 3834 coroapi.nready = coro_nready;
1311 coroapi.current = coro_current; 3835 coroapi.current = coro_current;
1312 3836
1313 GCoroAPI = &coroapi; 3837 /*GCoroAPI = &coroapi;*/
1314 sv_setiv (sv, (IV)&coroapi); 3838 sv_setiv (sv, (IV)&coroapi);
1315 SvREADONLY_on (sv); 3839 SvREADONLY_on (sv);
1316 } 3840 }
1317} 3841}
3842
3843SV *
3844async (...)
3845 PROTOTYPE: &@
3846 CODE:
3847 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3848 api_ready (aTHX_ RETVAL);
3849 OUTPUT:
3850 RETVAL
3851
3852void
3853_destroy (Coro::State coro)
3854 CODE:
3855 /* used by the manager thread */
3856 coro_state_destroy (aTHX_ coro);
3857
3858void
3859on_destroy (Coro::State coro, SV *cb)
3860 CODE:
3861 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3862
3863void
3864join (...)
3865 CODE:
3866 CORO_EXECUTE_SLF_XS (slf_init_join);
3867
3868void
3869terminate (...)
3870 CODE:
3871 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3872
3873void
3874cancel (...)
3875 CODE:
3876 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3877
3878int
3879safe_cancel (Coro::State self, ...)
3880 C_ARGS: aTHX_ self, &ST (1), items - 1
3881
3882void
3883schedule (...)
3884 CODE:
3885 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3886
3887void
3888schedule_to (...)
3889 CODE:
3890 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3891
3892void
3893cede_to (...)
3894 CODE:
3895 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3896
3897void
3898cede (...)
3899 CODE:
3900 CORO_EXECUTE_SLF_XS (slf_init_cede);
3901
3902void
3903cede_notself (...)
3904 CODE:
3905 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1318 3906
1319void 3907void
1320_set_current (SV *current) 3908_set_current (SV *current)
1321 PROTOTYPE: $ 3909 PROTOTYPE: $
1322 CODE: 3910 CODE:
1323 SvREFCNT_dec (SvRV (coro_current)); 3911 SvREFCNT_dec (SvRV (coro_current));
1324 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3912 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3913
3914void
3915_set_readyhook (SV *hook)
3916 PROTOTYPE: $
3917 CODE:
3918 SvREFCNT_dec (coro_readyhook);
3919 SvGETMAGIC (hook);
3920 if (SvOK (hook))
3921 {
3922 coro_readyhook = newSVsv (hook);
3923 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3924 }
3925 else
3926 {
3927 coro_readyhook = 0;
3928 CORO_READYHOOK = 0;
3929 }
1325 3930
1326int 3931int
1327prio (Coro::State coro, int newprio = 0) 3932prio (Coro::State coro, int newprio = 0)
3933 PROTOTYPE: $;$
1328 ALIAS: 3934 ALIAS:
1329 nice = 1 3935 nice = 1
1330 CODE: 3936 CODE:
1331{ 3937{
1332 RETVAL = coro->prio; 3938 RETVAL = coro->prio;
… …
1334 if (items > 1) 3940 if (items > 1)
1335 { 3941 {
1336 if (ix) 3942 if (ix)
1337 newprio = coro->prio - newprio; 3943 newprio = coro->prio - newprio;
1338 3944
1339 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3945 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1340 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3946 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1341 3947
1342 coro->prio = newprio; 3948 coro->prio = newprio;
1343 } 3949 }
1344} 3950}
1345 OUTPUT: 3951 OUTPUT:
… …
1347 3953
1348SV * 3954SV *
1349ready (SV *self) 3955ready (SV *self)
1350 PROTOTYPE: $ 3956 PROTOTYPE: $
1351 CODE: 3957 CODE:
1352 RETVAL = boolSV (api_ready (self)); 3958 RETVAL = boolSV (api_ready (aTHX_ self));
1353 OUTPUT:
1354 RETVAL
1355
1356SV *
1357is_ready (SV *self)
1358 PROTOTYPE: $
1359 CODE:
1360 RETVAL = boolSV (api_is_ready (self));
1361 OUTPUT: 3959 OUTPUT:
1362 RETVAL 3960 RETVAL
1363 3961
1364int 3962int
1365nready (...) 3963nready (...)
… …
1367 CODE: 3965 CODE:
1368 RETVAL = coro_nready; 3966 RETVAL = coro_nready;
1369 OUTPUT: 3967 OUTPUT:
1370 RETVAL 3968 RETVAL
1371 3969
1372MODULE = Coro::State PACKAGE = Coro::AIO 3970void
3971suspend (Coro::State self)
3972 PROTOTYPE: $
3973 CODE:
3974 self->flags |= CF_SUSPENDED;
3975
3976void
3977resume (Coro::State self)
3978 PROTOTYPE: $
3979 CODE:
3980 self->flags &= ~CF_SUSPENDED;
3981
3982void
3983_pool_handler (...)
3984 CODE:
3985 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3986
3987void
3988async_pool (SV *cv, ...)
3989 PROTOTYPE: &@
3990 PPCODE:
3991{
3992 HV *hv = (HV *)av_pop (av_async_pool);
3993 AV *av = newAV ();
3994 SV *cb = ST (0);
3995 int i;
3996
3997 av_extend (av, items - 2);
3998 for (i = 1; i < items; ++i)
3999 av_push (av, SvREFCNT_inc_NN (ST (i)));
4000
4001 if ((SV *)hv == &PL_sv_undef)
4002 {
4003 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
4004 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
4005 SvREFCNT_dec (sv);
4006 }
4007
4008 {
4009 struct coro *coro = SvSTATE_hv (hv);
4010
4011 assert (!coro->invoke_cb);
4012 assert (!coro->invoke_av);
4013 coro->invoke_cb = SvREFCNT_inc (cb);
4014 coro->invoke_av = av;
4015 }
4016
4017 api_ready (aTHX_ (SV *)hv);
4018
4019 if (GIMME_V != G_VOID)
4020 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4021 else
4022 SvREFCNT_dec (hv);
4023}
1373 4024
1374SV * 4025SV *
1375_get_state () 4026rouse_cb ()
4027 PROTOTYPE:
1376 CODE: 4028 CODE:
1377{ 4029 RETVAL = coro_new_rouse_cb (aTHX);
1378 struct io_state *data;
1379
1380 RETVAL = newSV (sizeof (struct io_state));
1381 data = (struct io_state *)SvPVX (RETVAL);
1382 SvCUR_set (RETVAL, sizeof (struct io_state));
1383 SvPOK_only (RETVAL);
1384
1385 data->errorno = errno;
1386 data->laststype = PL_laststype;
1387 data->laststatval = PL_laststatval;
1388 data->statcache = PL_statcache;
1389}
1390 OUTPUT: 4030 OUTPUT:
1391 RETVAL 4031 RETVAL
1392 4032
1393void 4033void
1394_set_state (char *data_) 4034rouse_wait (...)
4035 PROTOTYPE: ;$
4036 PPCODE:
4037 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4038
4039void
4040on_enter (SV *block)
4041 ALIAS:
4042 on_leave = 1
1395 PROTOTYPE: $ 4043 PROTOTYPE: &
1396 CODE: 4044 CODE:
1397{ 4045{
1398 struct io_state *data = (void *)data_; 4046 struct coro *coro = SvSTATE_current;
4047 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1399 4048
1400 errno = data->errorno; 4049 block = s_get_cv_croak (block);
1401 PL_laststype = data->laststype;
1402 PL_laststatval = data->laststatval;
1403 PL_statcache = data->statcache;
1404}
1405 4050
4051 if (!*avp)
4052 *avp = newAV ();
4053
4054 av_push (*avp, SvREFCNT_inc (block));
4055
4056 if (!ix)
4057 on_enterleave_call (aTHX_ block);
4058
4059 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4060 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4061 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4062}
4063
4064
4065MODULE = Coro::State PACKAGE = PerlIO::cede
4066
4067BOOT:
4068 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4069
4070
4071MODULE = Coro::State PACKAGE = Coro::Semaphore
4072
4073SV *
4074new (SV *klass, SV *count = 0)
4075 CODE:
4076{
4077 int semcnt = 1;
4078
4079 if (count)
4080 {
4081 SvGETMAGIC (count);
4082
4083 if (SvOK (count))
4084 semcnt = SvIV (count);
4085 }
4086
4087 RETVAL = sv_bless (
4088 coro_waitarray_new (aTHX_ semcnt),
4089 GvSTASH (CvGV (cv))
4090 );
4091}
4092 OUTPUT:
4093 RETVAL
4094
4095# helper for Coro::Channel and others
4096SV *
4097_alloc (int count)
4098 CODE:
4099 RETVAL = coro_waitarray_new (aTHX_ count);
4100 OUTPUT:
4101 RETVAL
4102
4103SV *
4104count (SV *self)
4105 CODE:
4106 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4107 OUTPUT:
4108 RETVAL
4109
4110void
4111up (SV *self, int adjust = 1)
4112 ALIAS:
4113 adjust = 1
4114 CODE:
4115 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4116
4117void
4118down (...)
4119 CODE:
4120 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4121
4122void
4123wait (...)
4124 CODE:
4125 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4126
4127void
4128try (SV *self)
4129 PPCODE:
4130{
4131 AV *av = (AV *)SvRV (self);
4132 SV *count_sv = AvARRAY (av)[0];
4133 IV count = SvIVX (count_sv);
4134
4135 if (count > 0)
4136 {
4137 --count;
4138 SvIVX (count_sv) = count;
4139 XSRETURN_YES;
4140 }
4141 else
4142 XSRETURN_NO;
4143}
4144
4145void
4146waiters (SV *self)
4147 PPCODE:
4148{
4149 AV *av = (AV *)SvRV (self);
4150 int wcount = AvFILLp (av) + 1 - 1;
4151
4152 if (GIMME_V == G_SCALAR)
4153 XPUSHs (sv_2mortal (newSViv (wcount)));
4154 else
4155 {
4156 int i;
4157 EXTEND (SP, wcount);
4158 for (i = 1; i <= wcount; ++i)
4159 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4160 }
4161}
4162
4163MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4164
4165void
4166_may_delete (SV *sem, int count, unsigned int extra_refs)
4167 PPCODE:
4168{
4169 AV *av = (AV *)SvRV (sem);
4170
4171 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4172 && AvFILLp (av) == 0 /* no waiters, just count */
4173 && SvIV (AvARRAY (av)[0]) == count)
4174 XSRETURN_YES;
4175
4176 XSRETURN_NO;
4177}
4178
4179MODULE = Coro::State PACKAGE = Coro::Signal
4180
4181SV *
4182new (SV *klass)
4183 CODE:
4184 RETVAL = sv_bless (
4185 coro_waitarray_new (aTHX_ 0),
4186 GvSTASH (CvGV (cv))
4187 );
4188 OUTPUT:
4189 RETVAL
4190
4191void
4192wait (...)
4193 CODE:
4194 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4195
4196void
4197broadcast (SV *self)
4198 CODE:
4199{
4200 AV *av = (AV *)SvRV (self);
4201 coro_signal_wake (aTHX_ av, AvFILLp (av));
4202}
4203
4204void
4205send (SV *self)
4206 CODE:
4207{
4208 AV *av = (AV *)SvRV (self);
4209
4210 if (AvFILLp (av))
4211 coro_signal_wake (aTHX_ av, 1);
4212 else
4213 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4214}
4215
4216IV
4217awaited (SV *self)
4218 CODE:
4219 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4220 OUTPUT:
4221 RETVAL
4222
4223
4224MODULE = Coro::State PACKAGE = Coro::AnyEvent
4225
4226BOOT:
4227 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4228
4229void
4230_schedule (...)
4231 CODE:
4232{
4233 static int incede;
4234
4235 api_cede_notself (aTHX);
4236
4237 ++incede;
4238 while (coro_nready >= incede && api_cede (aTHX))
4239 ;
4240
4241 sv_setsv (sv_activity, &PL_sv_undef);
4242 if (coro_nready >= incede)
4243 {
4244 PUSHMARK (SP);
4245 PUTBACK;
4246 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4247 }
4248
4249 --incede;
4250}
4251
4252
4253MODULE = Coro::State PACKAGE = Coro::AIO
4254
4255void
4256_register (char *target, char *proto, SV *req)
4257 CODE:
4258{
4259 SV *req_cv = s_get_cv_croak (req);
4260 /* newXSproto doesn't return the CV on 5.8 */
4261 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4262 sv_setpv ((SV *)slf_cv, proto);
4263 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4264}
4265
4266MODULE = Coro::State PACKAGE = Coro::Select
4267
4268void
4269patch_pp_sselect ()
4270 CODE:
4271 if (!coro_old_pp_sselect)
4272 {
4273 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4274 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4275 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4276 }
4277
4278void
4279unpatch_pp_sselect ()
4280 CODE:
4281 if (coro_old_pp_sselect)
4282 {
4283 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4284 coro_old_pp_sselect = 0;
4285 }
4286

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