ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/Coro/Coro/State.xs
(Generate patch)

Comparing Coro/Coro/State.xs (file contents):
Revision 1.99 by root, Sun Nov 26 23:53:20 2006 UTC vs.
Revision 1.425 by root, Wed Dec 5 00:14:22 2012 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1
5
1#include "libcoro/coro.c" 6#include "libcoro/coro.c"
7
8#define PERL_NO_GET_CONTEXT
9#define PERL_EXT
2 10
3#include "EXTERN.h" 11#include "EXTERN.h"
4#include "perl.h" 12#include "perl.h"
5#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
6 15
7#include "patchlevel.h" 16#include "schmorp.h"
8 17
9#if PERL_VERSION < 6 18#define ECB_NO_THREADS 1
10# ifndef PL_ppaddr 19#include "ecb.h"
11# define PL_ppaddr ppaddr
12# endif
13# ifndef call_sv
14# define call_sv perl_call_sv
15# endif
16# ifndef get_sv
17# define get_sv perl_get_sv
18# endif
19# ifndef get_cv
20# define get_cv perl_get_cv
21# endif
22# ifndef IS_PADGV
23# define IS_PADGV(v) 0
24# endif
25# ifndef IS_PADCONST
26# define IS_PADCONST(v) 0
27# endif
28#endif
29 20
21#include <stddef.h>
30#include <stdio.h> 22#include <stdio.h>
31#include <errno.h> 23#include <errno.h>
24#include <assert.h>
32 25
33#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 26#ifndef SVs_PADSTALE
34# undef STACKGUARD 27# define SVs_PADSTALE 0
28#endif
29
30#ifdef PadARRAY
31# define NEWPADAPI
32# define newPADLIST(var) (Newz (0, var, 1, PADLIST), Newx (PadlistARRAY (var), 2, PAD *))
33#else
34typedef AV PADNAMELIST;
35# if !PERL_VERSION_ATLEAST(5,8,0)
36typedef AV PADLIST;
37typedef AV PAD;
35#endif 38# endif
36 39# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
37#ifndef STACKGUARD 40# define PadlistMAX(pl) AvFILLp (pl)
38# define STACKGUARD 0 41# define PadlistNAMES(pl) (*PadlistARRAY (pl))
42# define PadARRAY AvARRAY
43# define PadMAX AvFILLp
44# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
39#endif 45#endif
40 46
47#if defined(_WIN32)
48# undef HAS_GETTIMEOFDAY
49# undef setjmp
50# undef longjmp
51# undef _exit
52# define setjmp _setjmp /* deep magic */
53#else
54# include <inttypes.h> /* most portable stdint.h */
55#endif
56
41#ifdef HAVE_MMAP 57#if HAVE_MMAP
42# include <unistd.h> 58# include <unistd.h>
43# include <sys/mman.h> 59# include <sys/mman.h>
44# ifndef MAP_ANONYMOUS 60# ifndef MAP_ANONYMOUS
45# ifdef MAP_ANON 61# ifdef MAP_ANON
46# define MAP_ANONYMOUS MAP_ANON 62# define MAP_ANONYMOUS MAP_ANON
… …
52# ifndef PAGESIZE 68# ifndef PAGESIZE
53# define PAGESIZE pagesize 69# define PAGESIZE pagesize
54# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 70# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
55static long pagesize; 71static long pagesize;
56# else 72# else
57# define BOOT_PAGESIZE 73# define BOOT_PAGESIZE (void)0
58# endif 74# endif
75#else
76# define PAGESIZE 0
77# define BOOT_PAGESIZE (void)0
59#endif 78#endif
60 79
61/* The next macro should declare a variable stacklevel that contains and approximation 80#if CORO_USE_VALGRIND
62 * to the current C stack pointer. Its property is that it changes with each call 81# include <valgrind/valgrind.h>
63 * and should be unique. */ 82#endif
83
84/* the maximum number of idle cctx that will be pooled */
85static int cctx_max_idle = 4;
86
87#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
88# define HAS_SCOPESTACK_NAME 1
89#endif
90
91#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
92# undef CORO_STACKGUARD
93#endif
94
95#ifndef CORO_STACKGUARD
96# define CORO_STACKGUARD 0
97#endif
98
99/* prefer perl internal functions over our own? */
100#ifndef CORO_PREFER_PERL_FUNCTIONS
101# define CORO_PREFER_PERL_FUNCTIONS 0
102#endif
103
104/* The next macros try to return the current stack pointer, in an as
105 * portable way as possible. */
106#if __GNUC__ >= 4
64#define dSTACKLEVEL int stacklevel 107# define dSTACKLEVEL int stacklevel_dummy
108# define STACKLEVEL __builtin_frame_address (0)
109#else
110# define dSTACKLEVEL volatile void *stacklevel
65#define STACKLEVEL ((void *)&stacklevel) 111# define STACKLEVEL ((void *)&stacklevel)
112#endif
66 113
67#define IN_DESTRUCT (PL_main_cv == Nullcv) 114#define IN_DESTRUCT PL_dirty
68 115
69#include "CoroAPI.h" 116#include "CoroAPI.h"
70 117#define GCoroAPI (&coroapi) /* very sneaky */
71#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
72 118
73#ifdef USE_ITHREADS 119#ifdef USE_ITHREADS
74static perl_mutex coro_mutex; 120# if CORO_PTHREAD
75# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 121static void *coro_thx;
76# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
77#else
78# define LOCK (void)0
79# define UNLOCK (void)0
80#endif 122# endif
123#endif
81 124
125#ifdef __linux
126# include <time.h> /* for timespec */
127# include <syscall.h> /* for SYS_* */
128# ifdef SYS_clock_gettime
129# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
130# define CORO_CLOCK_MONOTONIC 1
131# define CORO_CLOCK_THREAD_CPUTIME_ID 3
132# endif
133#endif
134
135static double (*nvtime)(); /* so why doesn't it take void? */
136static void (*u2time)(pTHX_ UV ret[2]);
137
138/* we hijack an hopefully unused CV flag for our purposes */
139#define CVf_SLF 0x4000
140static OP *pp_slf (pTHX);
141static void slf_destroy (pTHX_ struct coro *coro);
142
143static U32 cctx_gen;
144static size_t cctx_stacksize = CORO_STACKSIZE;
82static struct CoroAPI coroapi; 145static struct CoroAPI coroapi;
83static AV *main_mainstack; /* used to differentiate between $main and others */ 146static AV *main_mainstack; /* used to differentiate between $main and others */
147static JMPENV *main_top_env;
84static HV *coro_state_stash, *coro_stash; 148static HV *coro_state_stash, *coro_stash;
85static SV *coro_mortal; /* will be freed after next transfer */ 149static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
150
151static AV *av_destroy; /* destruction queue */
152static SV *sv_manager; /* the manager coro */
153static SV *sv_idle; /* $Coro::idle */
154
155static GV *irsgv; /* $/ */
156static GV *stdoutgv; /* *STDOUT */
157static SV *rv_diehook;
158static SV *rv_warnhook;
159static HV *hv_sig; /* %SIG */
160
161/* async_pool helper stuff */
162static SV *sv_pool_rss;
163static SV *sv_pool_size;
164static SV *sv_async_pool_idle; /* description string */
165static AV *av_async_pool; /* idle pool */
166static SV *sv_Coro; /* class string */
167static CV *cv_pool_handler;
168
169/* Coro::AnyEvent */
170static SV *sv_activity;
171
172/* enable processtime/realtime profiling */
173static char enable_times;
174typedef U32 coro_ts[2];
175static coro_ts time_real, time_cpu;
176static char times_valid;
177
178static struct coro_cctx *cctx_first;
179static int cctx_count, cctx_idle;
180
181enum
182{
183 CC_MAPPED = 0x01,
184 CC_NOREUSE = 0x02, /* throw this away after tracing */
185 CC_TRACE = 0x04,
186 CC_TRACE_SUB = 0x08, /* trace sub calls */
187 CC_TRACE_LINE = 0x10, /* trace each statement */
188 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
189};
86 190
87/* this is a structure representing a c-level coroutine */ 191/* this is a structure representing a c-level coroutine */
88typedef struct coro_stack { 192typedef struct coro_cctx
193{
89 struct coro_stack *next; 194 struct coro_cctx *next;
90 195
91 /* the stack */ 196 /* the stack */
92 void *sptr; 197 void *sptr;
93 long ssize; /* positive == mmap, otherwise malloc */ 198 size_t ssize;
94 199
95 /* cpu state */ 200 /* cpu state */
96 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 201 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
202#ifndef NDEBUG
203 JMPENV *idle_te; /* same as idle_sp, but for top_env */
204#endif
97 JMPENV *top_env; 205 JMPENV *top_env;
98 coro_context cctx; 206 coro_context cctx;
99} coro_stack; 207
208 U32 gen;
209#if CORO_USE_VALGRIND
210 int valgrind_id;
211#endif
212 unsigned char flags;
213} coro_cctx;
214
215static coro_cctx *cctx_current; /* the currently running cctx */
216
217/*****************************************************************************/
218
219static MGVTBL coro_state_vtbl;
220
221enum
222{
223 CF_RUNNING = 0x0001, /* coroutine is running */
224 CF_READY = 0x0002, /* coroutine is ready */
225 CF_NEW = 0x0004, /* has never been switched to */
226 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
227 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
228 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
229};
230
231/* the structure where most of the perl state is stored, overlaid on the cxstack */
232typedef struct
233{
234 #define VARx(name,expr,type) type name;
235 #include "state.h"
236} perl_slots;
237
238/* how many context stack entries do we need for perl_slots */
239#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
100 240
101/* this is a structure representing a perl-level coroutine */ 241/* this is a structure representing a perl-level coroutine */
102struct coro { 242struct coro
243{
103 /* the c coroutine allocated to this perl coroutine, if any */ 244 /* the C coroutine allocated to this perl coroutine, if any */
104 coro_stack *stack; 245 coro_cctx *cctx;
105 246
106 /* data associated with this coroutine (initial args) */ 247 /* ready queue */
107 AV *args; 248 struct coro *next_ready;
108 int refcnt;
109 249
110 /* optionally saved, might be zero */ 250 /* state data */
111 AV *defav; 251 struct CoroSLF slf_frame; /* saved slf frame */
112 SV *defsv;
113 SV *errsv;
114
115 /* saved global state not related to stacks */
116 U8 dowarn;
117 I32 in_eval;
118
119 /* the stacks and related info (callchain etc..) */
120 PERL_SI *curstackinfo;
121 AV *curstack;
122 AV *mainstack; 252 AV *mainstack;
123 SV **stack_sp; 253 perl_slots *slot; /* basically the saved sp */
124 OP *op; 254
125 SV **curpad; 255 CV *startcv; /* the CV to execute */
126 AV *comppad; 256 AV *args; /* data associated with this coroutine (initial args) */
127 CV *compcv; 257 int flags; /* CF_ flags */
128 SV **stack_base; 258 HV *hv; /* the perl hash associated with this coro, if any */
129 SV **stack_max; 259
130 SV **tmps_stack; 260 /* statistics */
131 I32 tmps_floor; 261 int usecount; /* number of transfers to this coro */
132 I32 tmps_ix;
133 I32 tmps_max;
134 I32 *markstack;
135 I32 *markstack_ptr;
136 I32 *markstack_max;
137 I32 *scopestack;
138 I32 scopestack_ix;
139 I32 scopestack_max;
140 ANY *savestack;
141 I32 savestack_ix;
142 I32 savestack_max;
143 OP **retstack;
144 I32 retstack_ix;
145 I32 retstack_max;
146 PMOP *curpm;
147 COP *curcop;
148 262
149 /* coro process data */ 263 /* coro process data */
150 int prio; 264 int prio;
265 SV *except; /* exception to be thrown */
266 SV *rouse_cb; /* last rouse callback */
267 AV *on_destroy; /* callbacks or coros to notify on destroy */
268 AV *status; /* the exit status list */
269
270 /* async_pool */
271 SV *saved_deffh;
272 SV *invoke_cb;
273 AV *invoke_av;
274
275 /* on_enter/on_leave */
276 AV *on_enter;
277 AV *on_leave;
278
279 /* swap_sv */
280 AV *swap_sv;
281
282 /* times */
283 coro_ts t_cpu, t_real;
284
285 /* linked list */
286 struct coro *next, *prev;
151}; 287};
152 288
153typedef struct coro *Coro__State; 289typedef struct coro *Coro__State;
154typedef struct coro *Coro__State_or_hashref; 290typedef struct coro *Coro__State_or_hashref;
155 291
292/* the following variables are effectively part of the perl context */
293/* and get copied between struct coro and these variables */
294/* the main reason we don't support windows process emulation */
295static struct CoroSLF slf_frame; /* the current slf frame */
296
297/** Coro ********************************************************************/
298
299#define CORO_PRIO_MAX 3
300#define CORO_PRIO_HIGH 1
301#define CORO_PRIO_NORMAL 0
302#define CORO_PRIO_LOW -1
303#define CORO_PRIO_IDLE -3
304#define CORO_PRIO_MIN -4
305
306/* for Coro.pm */
307static SV *coro_current;
308static SV *coro_readyhook;
309static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
310static CV *cv_coro_run;
311static struct coro *coro_first;
312#define coro_nready coroapi.nready
313
314/** JIT *********************************************************************/
315
316#if CORO_JIT
317 /* APPLE doesn't have HAVE_MMAP though */
318 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
319 #ifndef CORO_JIT_TYPE
320 #if __x86_64 && CORO_JIT_UNIXY
321 #define CORO_JIT_TYPE "amd64-unix"
322 #elif __i386 && CORO_JIT_UNIXY
323 #define CORO_JIT_TYPE "x86-unix"
324 #endif
325 #endif
326#endif
327
328#if !defined(CORO_JIT_TYPE) || !HAVE_MMAP
329 #undef CORO_JIT
330#endif
331
332#if CORO_JIT
333 typedef void (*load_save_perl_slots_type)(perl_slots *);
334 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
335#endif
336
337/** Coro::Select ************************************************************/
338
339static OP *(*coro_old_pp_sselect) (pTHX);
340static SV *coro_select_select;
341
342/* horrible hack, but if it works... */
156static AV * 343static OP *
344coro_pp_sselect (pTHX)
345{
346 dSP;
347 PUSHMARK (SP - 4); /* fake argument list */
348 XPUSHs (coro_select_select);
349 PUTBACK;
350
351 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
352 PL_op->op_flags |= OPf_STACKED;
353 PL_op->op_private = 0;
354 return PL_ppaddr [OP_ENTERSUB](aTHX);
355}
356
357/** time stuff **************************************************************/
358
359#ifdef HAS_GETTIMEOFDAY
360
361ecb_inline void
362coro_u2time (pTHX_ UV ret[2])
363{
364 struct timeval tv;
365 gettimeofday (&tv, 0);
366
367 ret [0] = tv.tv_sec;
368 ret [1] = tv.tv_usec;
369}
370
371ecb_inline double
372coro_nvtime (void)
373{
374 struct timeval tv;
375 gettimeofday (&tv, 0);
376
377 return tv.tv_sec + tv.tv_usec * 1e-6;
378}
379
380ecb_inline void
381time_init (pTHX)
382{
383 nvtime = coro_nvtime;
384 u2time = coro_u2time;
385}
386
387#else
388
389ecb_inline void
390time_init (pTHX)
391{
392 SV **svp;
393
394 require_pv ("Time/HiRes.pm");
395
396 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
397
398 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
399 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
400
401 nvtime = INT2PTR (double (*)(), SvIV (*svp));
402
403 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
404 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
405}
406
407#endif
408
409/** lowlevel stuff **********************************************************/
410
411static SV * ecb_noinline
412coro_get_sv (pTHX_ const char *name, int create)
413{
414#if PERL_VERSION_ATLEAST (5,10,0)
415 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
416 get_sv (name, create);
417#endif
418 return get_sv (name, create);
419}
420
421static AV * ecb_noinline
422coro_get_av (pTHX_ const char *name, int create)
423{
424#if PERL_VERSION_ATLEAST (5,10,0)
425 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
426 get_av (name, create);
427#endif
428 return get_av (name, create);
429}
430
431static HV * ecb_noinline
432coro_get_hv (pTHX_ const char *name, int create)
433{
434#if PERL_VERSION_ATLEAST (5,10,0)
435 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
436 get_hv (name, create);
437#endif
438 return get_hv (name, create);
439}
440
441ecb_inline void
442coro_times_update (void)
443{
444#ifdef coro_clock_gettime
445 struct timespec ts;
446
447 ts.tv_sec = ts.tv_nsec = 0;
448 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
449 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
450
451 ts.tv_sec = ts.tv_nsec = 0;
452 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
453 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
454#else
455 dTHX;
456 UV tv[2];
457
458 u2time (aTHX_ tv);
459 time_real [0] = tv [0];
460 time_real [1] = tv [1] * 1000;
461#endif
462}
463
464ecb_inline void
465coro_times_add (struct coro *c)
466{
467 c->t_real [1] += time_real [1];
468 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
469 c->t_real [0] += time_real [0];
470
471 c->t_cpu [1] += time_cpu [1];
472 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
473 c->t_cpu [0] += time_cpu [0];
474}
475
476ecb_inline void
477coro_times_sub (struct coro *c)
478{
479 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
480 c->t_real [1] -= time_real [1];
481 c->t_real [0] -= time_real [0];
482
483 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
484 c->t_cpu [1] -= time_cpu [1];
485 c->t_cpu [0] -= time_cpu [0];
486}
487
488/*****************************************************************************/
489/* magic glue */
490
491#define CORO_MAGIC_type_cv 26
492#define CORO_MAGIC_type_state PERL_MAGIC_ext
493
494#define CORO_MAGIC_NN(sv, type) \
495 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
496 ? SvMAGIC (sv) \
497 : mg_find (sv, type))
498
499#define CORO_MAGIC(sv, type) \
500 (ecb_expect_true (SvMAGIC (sv)) \
501 ? CORO_MAGIC_NN (sv, type) \
502 : 0)
503
504#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
505#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
506
507ecb_inline MAGIC *
508SvSTATEhv_p (pTHX_ SV *coro)
509{
510 MAGIC *mg;
511
512 if (ecb_expect_true (
513 SvTYPE (coro) == SVt_PVHV
514 && (mg = CORO_MAGIC_state (coro))
515 && mg->mg_virtual == &coro_state_vtbl
516 ))
517 return mg;
518
519 return 0;
520}
521
522ecb_inline struct coro *
523SvSTATE_ (pTHX_ SV *coro)
524{
525 MAGIC *mg;
526
527 if (SvROK (coro))
528 coro = SvRV (coro);
529
530 mg = SvSTATEhv_p (aTHX_ coro);
531 if (!mg)
532 croak ("Coro::State object required");
533
534 return (struct coro *)mg->mg_ptr;
535}
536
537#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
538
539/* faster than SvSTATE, but expects a coroutine hv */
540#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
541#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
542
543/*****************************************************************************/
544/* padlist management and caching */
545
546ecb_inline PADLIST *
157coro_clone_padlist (CV *cv) 547coro_derive_padlist (pTHX_ CV *cv)
158{ 548{
159 AV *padlist = CvPADLIST (cv); 549 PADLIST *padlist = CvPADLIST (cv);
160 AV *newpadlist, *newpad; 550 PADLIST *newpadlist;
551 PAD *newpad;
552 PADOFFSET const off = PadlistMAX (padlist) + 1;
161 553
162 newpadlist = newAV (); 554 newPADLIST(newpadlist);
555#if !PERL_VERSION_ATLEAST(5,15,3)
556 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
163 AvREAL_off (newpadlist); 557 AvREAL_off (newpadlist);
164#if PERL_VERSION < 9 558#endif
165 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 559#if PERL_VERSION_ATLEAST (5,10,0)
560 Perl_pad_push (aTHX_ padlist, off);
166#else 561#else
167 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 562 Perl_pad_push (aTHX_ padlist, off, 1);
168#endif 563#endif
169 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 564 newpad = PadlistARRAY (padlist)[off];
170 --AvFILLp (padlist); 565 PadlistMAX (padlist) = off - 1;
171 566
172 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 567 /* Already extended to 2 elements by newPADLIST. */
173 av_store (newpadlist, 1, (SV *)newpad); 568 PadlistMAX (newpadlist) = 1;
569 PadlistNAMES (newpadlist) = (PADNAMELIST *)SvREFCNT_inc_NN (PadlistNAMES (padlist));
570 PadlistARRAY (newpadlist)[1] = newpad;
174 571
175 return newpadlist; 572 return newpadlist;
176} 573}
177 574
178static void 575ecb_inline void
179free_padlist (AV *padlist) 576free_padlist (pTHX_ PADLIST *padlist)
180{ 577{
181 /* may be during global destruction */ 578 /* may be during global destruction */
182 if (SvREFCNT (padlist)) 579 if (!IN_DESTRUCT)
183 { 580 {
184 I32 i = AvFILLp (padlist); 581 I32 i = PadlistMAX (padlist);
185 while (i >= 0) 582
583 while (i > 0) /* special-case index 0 */
186 { 584 {
187 SV **svp = av_fetch (padlist, i--, FALSE); 585 /* we try to be extra-careful here */
188 if (svp) 586 PAD *pad = PadlistARRAY (padlist)[i--];
189 { 587 I32 j = PadMAX (pad);
190 SV *sv;
191 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
192 SvREFCNT_dec (sv);
193 588
589 while (j >= 0)
590 SvREFCNT_dec (PadARRAY (pad)[j--]);
591
592 PadMAX (pad) = -1;
194 SvREFCNT_dec (*svp); 593 SvREFCNT_dec (pad);
195 }
196 } 594 }
197 595
596 SvREFCNT_dec (PadlistNAMES (padlist));
597
598#ifdef NEWPADAPI
599 Safefree (PadlistARRAY (padlist));
600 Safefree (padlist);
601#else
602 AvFILLp (padlist) = -1;
603 AvREAL_off (padlist);
198 SvREFCNT_dec ((SV*)padlist); 604 SvREFCNT_dec ((SV*)padlist);
605#endif
199 } 606 }
200} 607}
201 608
202static int 609static int
203coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 610coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
204{ 611{
205 AV *padlist; 612 PADLIST *padlist;
206 AV *av = (AV *)mg->mg_obj; 613 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
614 size_t len = *(size_t *)mg->mg_ptr;
207 615
208 /* casting is fun. */ 616 /* perl manages to free our internal AV and _then_ call us */
209 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 617 if (IN_DESTRUCT)
618 return 0;
619
620 while (len--)
210 free_padlist (padlist); 621 free_padlist (aTHX_ padlists[len]);
211
212 SvREFCNT_dec (av);
213 622
214 return 0; 623 return 0;
215} 624}
216 625
217#define PERL_MAGIC_coro PERL_MAGIC_ext 626static MGVTBL coro_cv_vtbl = {
218 627 0, 0, 0, 0,
219static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 628 coro_cv_free
629};
220 630
221/* the next two functions merely cache the padlists */ 631/* the next two functions merely cache the padlists */
222static void 632ecb_inline void
223get_padlist (CV *cv) 633get_padlist (pTHX_ CV *cv)
224{ 634{
225 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 635 MAGIC *mg = CORO_MAGIC_cv (cv);
636 size_t *lenp;
226 637
227 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 638 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
228 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 639 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
229 else 640 else
230 { 641 {
231#if 0 642#if CORO_PREFER_PERL_FUNCTIONS
232 /* this is probably cleaner, but also slower? */ 643 /* this is probably cleaner? but also slower! */
644 /* in practise, it seems to be less stable */
233 CV *cp = Perl_cv_clone (cv); 645 CV *cp = Perl_cv_clone (aTHX_ cv);
234 CvPADLIST (cv) = CvPADLIST (cp); 646 CvPADLIST (cv) = CvPADLIST (cp);
235 CvPADLIST (cp) = 0; 647 CvPADLIST (cp) = 0;
236 SvREFCNT_dec (cp); 648 SvREFCNT_dec (cp);
237#else 649#else
238 CvPADLIST (cv) = coro_clone_padlist (cv); 650 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
239#endif 651#endif
240 } 652 }
241} 653}
242 654
243static void 655ecb_inline void
244put_padlist (CV *cv) 656put_padlist (pTHX_ CV *cv)
245{ 657{
246 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 658 MAGIC *mg = CORO_MAGIC_cv (cv);
247 659
248 if (!mg) 660 if (ecb_expect_false (!mg))
249 {
250 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
251 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
252 mg->mg_virtual = &vtbl_coro;
253 mg->mg_obj = (SV *)newAV ();
254 } 661 {
662 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
663 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
664 mg->mg_len = 1; /* so mg_free frees mg_ptr */
665 }
666 else
667 Renew (mg->mg_ptr,
668 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
669 char);
255 670
256 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 671 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
257} 672}
258 673
259#define SB do { 674/** load & save, init *******************************************************/
260#define SE } while (0)
261 675
262#define LOAD(state) load_state((state)); 676ecb_inline void
263#define SAVE(state,flags) save_state((state),(flags)); 677swap_sv (SV *a, SV *b)
678{
679 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
680 SV tmp;
264 681
265#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 682 /* swap sv_any */
683 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
266 684
685 /* swap sv_flags */
686 SvFLAGS (&tmp) = SvFLAGS (a);
687 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
688 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
689
690#if PERL_VERSION_ATLEAST (5,10,0)
691 /* perl 5.10 and later complicates this _quite_ a bit, but it also
692 * is much faster, so no quarrels here. alternatively, we could
693 * sv_upgrade to avoid this.
694 */
695 {
696 /* swap sv_u */
697 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
698
699 /* if SvANY points to the head, we need to adjust the pointers,
700 * as the pointer for a still points to b, and maybe vice versa.
701 */
702 #define svany_in_head(type) \
703 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
704
705 if (svany_in_head (SvTYPE (a)))
706 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
707
708 if (svany_in_head (SvTYPE (b)))
709 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
710 }
711#endif
712}
713
714/* swap sv heads, at least logically */
267static void 715static void
716swap_svs (pTHX_ Coro__State c)
717{
718 int i;
719
720 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
721 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
722}
723
724#define SWAP_SVS(coro) \
725 if (ecb_expect_false ((coro)->swap_sv)) \
726 swap_svs (aTHX_ (coro))
727
728static void
729on_enterleave_call (pTHX_ SV *cb);
730
731static void
268load_state(Coro__State c) 732load_perl (pTHX_ Coro__State c)
269{ 733{
270 PL_dowarn = c->dowarn; 734 perl_slots *slot = c->slot;
271 PL_in_eval = c->in_eval; 735 c->slot = 0;
272 736
273 PL_curstackinfo = c->curstackinfo;
274 PL_curstack = c->curstack;
275 PL_mainstack = c->mainstack; 737 PL_mainstack = c->mainstack;
276 PL_stack_sp = c->stack_sp;
277 PL_op = c->op;
278 PL_curpad = c->curpad;
279 PL_comppad = c->comppad;
280 PL_compcv = c->compcv;
281 PL_stack_base = c->stack_base;
282 PL_stack_max = c->stack_max;
283 PL_tmps_stack = c->tmps_stack;
284 PL_tmps_floor = c->tmps_floor;
285 PL_tmps_ix = c->tmps_ix;
286 PL_tmps_max = c->tmps_max;
287 PL_markstack = c->markstack;
288 PL_markstack_ptr = c->markstack_ptr;
289 PL_markstack_max = c->markstack_max;
290 PL_scopestack = c->scopestack;
291 PL_scopestack_ix = c->scopestack_ix;
292 PL_scopestack_max = c->scopestack_max;
293 PL_savestack = c->savestack;
294 PL_savestack_ix = c->savestack_ix;
295 PL_savestack_max = c->savestack_max;
296#if PERL_VERSION < 9
297 PL_retstack = c->retstack;
298 PL_retstack_ix = c->retstack_ix;
299 PL_retstack_max = c->retstack_max;
300#endif
301 PL_curpm = c->curpm;
302 PL_curcop = c->curcop;
303 738
304 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 739#if CORO_JIT
305 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 740 load_perl_slots (slot);
306 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 741#else
742 #define VARx(name,expr,type) expr = slot->name;
743 #include "state.h"
744#endif
307 745
308 { 746 {
309 dSP; 747 dSP;
748
310 CV *cv; 749 CV *cv;
311 750
312 /* now do the ugly restore mess */ 751 /* now do the ugly restore mess */
313 while ((cv = (CV *)POPs)) 752 while (ecb_expect_true (cv = (CV *)POPs))
314 { 753 {
315 AV *padlist = (AV *)POPs;
316
317 if (padlist)
318 {
319 put_padlist (cv); /* mark this padlist as available */ 754 put_padlist (aTHX_ cv); /* mark this padlist as available */
320 CvPADLIST(cv) = padlist; 755 CvDEPTH (cv) = PTR2IV (POPs);
321 } 756 CvPADLIST (cv) = (PADLIST *)POPs;
322
323 ++CvDEPTH(cv);
324 } 757 }
325 758
326 PUTBACK; 759 PUTBACK;
327 } 760 }
328}
329 761
762 slf_frame = c->slf_frame;
763 CORO_THROW = c->except;
764
765 if (ecb_expect_false (enable_times))
766 {
767 if (ecb_expect_false (!times_valid))
768 coro_times_update ();
769
770 coro_times_sub (c);
771 }
772
773 if (ecb_expect_false (c->on_enter))
774 {
775 int i;
776
777 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
778 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
779 }
780
781 SWAP_SVS (c);
782}
783
330static void 784static void
331save_state(Coro__State c, int flags) 785save_perl (pTHX_ Coro__State c)
332{ 786{
787 SWAP_SVS (c);
788
789 if (ecb_expect_false (c->on_leave))
790 {
791 int i;
792
793 for (i = AvFILLp (c->on_leave); i >= 0; --i)
794 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
795 }
796
797 times_valid = 0;
798
799 if (ecb_expect_false (enable_times))
800 {
801 coro_times_update (); times_valid = 1;
802 coro_times_add (c);
803 }
804
805 c->except = CORO_THROW;
806 c->slf_frame = slf_frame;
807
333 { 808 {
334 dSP; 809 dSP;
335 I32 cxix = cxstack_ix; 810 I32 cxix = cxstack_ix;
336 PERL_CONTEXT *ccstk = cxstack; 811 PERL_CONTEXT *ccstk = cxstack;
337 PERL_SI *top_si = PL_curstackinfo; 812 PERL_SI *top_si = PL_curstackinfo;
… …
339 /* 814 /*
340 * the worst thing you can imagine happens first - we have to save 815 * the worst thing you can imagine happens first - we have to save
341 * (and reinitialize) all cv's in the whole callchain :( 816 * (and reinitialize) all cv's in the whole callchain :(
342 */ 817 */
343 818
344 PUSHs (Nullsv); 819 XPUSHs (Nullsv);
345 /* this loop was inspired by pp_caller */ 820 /* this loop was inspired by pp_caller */
346 for (;;) 821 for (;;)
347 { 822 {
348 while (cxix >= 0) 823 while (ecb_expect_true (cxix >= 0))
349 { 824 {
350 PERL_CONTEXT *cx = &ccstk[cxix--]; 825 PERL_CONTEXT *cx = &ccstk[cxix--];
351 826
352 if (CxTYPE(cx) == CXt_SUB) 827 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
353 { 828 {
354 CV *cv = cx->blk_sub.cv; 829 CV *cv = cx->blk_sub.cv;
830
355 if (CvDEPTH(cv)) 831 if (ecb_expect_true (CvDEPTH (cv)))
356 { 832 {
357 EXTEND (SP, CvDEPTH(cv)*2); 833 EXTEND (SP, 3);
358
359 while (--CvDEPTH(cv))
360 {
361 /* this tells the restore code to increment CvDEPTH */
362 PUSHs (Nullsv);
363 PUSHs ((SV *)cv);
364 }
365
366 PUSHs ((SV *)CvPADLIST(cv)); 834 PUSHs ((SV *)CvPADLIST (cv));
835 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
367 PUSHs ((SV *)cv); 836 PUSHs ((SV *)cv);
368 837
838 CvDEPTH (cv) = 0;
369 get_padlist (cv); 839 get_padlist (aTHX_ cv);
370 } 840 }
371 } 841 }
372#ifdef CXt_FORMAT
373 else if (CxTYPE(cx) == CXt_FORMAT)
374 {
375 /* I never used formats, so how should I know how these are implemented? */
376 /* my bold guess is as a simple, plain sub... */
377 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
378 }
379#endif
380 } 842 }
381 843
382 if (top_si->si_type == PERLSI_MAIN) 844 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
383 break; 845 break;
384 846
385 top_si = top_si->si_prev; 847 top_si = top_si->si_prev;
386 ccstk = top_si->si_cxstack; 848 ccstk = top_si->si_cxstack;
387 cxix = top_si->si_cxix; 849 cxix = top_si->si_cxix;
388 } 850 }
389 851
390 PUTBACK; 852 PUTBACK;
391 } 853 }
392 854
393 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 855 /* allocate some space on the context stack for our purposes */
394 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 856 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
395 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 857 {
858 unsigned int i;
396 859
397 c->dowarn = PL_dowarn; 860 for (i = 0; i < SLOT_COUNT; ++i)
398 c->in_eval = PL_in_eval; 861 CXINC;
399 862
400 c->curstackinfo = PL_curstackinfo; 863 cxstack_ix -= SLOT_COUNT; /* undo allocation */
401 c->curstack = PL_curstack; 864 }
865
402 c->mainstack = PL_mainstack; 866 c->mainstack = PL_mainstack;
403 c->stack_sp = PL_stack_sp; 867
404 c->op = PL_op; 868 {
405 c->curpad = PL_curpad; 869 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
406 c->comppad = PL_comppad; 870
407 c->compcv = PL_compcv; 871#if CORO_JIT
408 c->stack_base = PL_stack_base; 872 save_perl_slots (slot);
409 c->stack_max = PL_stack_max; 873#else
410 c->tmps_stack = PL_tmps_stack; 874 #define VARx(name,expr,type) slot->name = expr;
411 c->tmps_floor = PL_tmps_floor; 875 #include "state.h"
412 c->tmps_ix = PL_tmps_ix;
413 c->tmps_max = PL_tmps_max;
414 c->markstack = PL_markstack;
415 c->markstack_ptr = PL_markstack_ptr;
416 c->markstack_max = PL_markstack_max;
417 c->scopestack = PL_scopestack;
418 c->scopestack_ix = PL_scopestack_ix;
419 c->scopestack_max = PL_scopestack_max;
420 c->savestack = PL_savestack;
421 c->savestack_ix = PL_savestack_ix;
422 c->savestack_max = PL_savestack_max;
423#if PERL_VERSION < 9
424 c->retstack = PL_retstack;
425 c->retstack_ix = PL_retstack_ix;
426 c->retstack_max = PL_retstack_max;
427#endif 876#endif
428 c->curpm = PL_curpm; 877 }
429 c->curcop = PL_curcop;
430} 878}
431 879
432/* 880/*
433 * allocate various perl stacks. This is an exact copy 881 * allocate various perl stacks. This is almost an exact copy
434 * of perl.c:init_stacks, except that it uses less memory 882 * of perl.c:init_stacks, except that it uses less memory
435 * on the (sometimes correct) assumption that coroutines do 883 * on the (sometimes correct) assumption that coroutines do
436 * not usually need a lot of stackspace. 884 * not usually need a lot of stackspace.
437 */ 885 */
886#if CORO_PREFER_PERL_FUNCTIONS
887# define coro_init_stacks(thx) init_stacks ()
888#else
438static void 889static void
439coro_init_stacks () 890coro_init_stacks (pTHX)
440{ 891{
441 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 892 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
442 PL_curstackinfo->si_type = PERLSI_MAIN; 893 PL_curstackinfo->si_type = PERLSI_MAIN;
443 PL_curstack = PL_curstackinfo->si_stack; 894 PL_curstack = PL_curstackinfo->si_stack;
444 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 895 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
445 896
446 PL_stack_base = AvARRAY(PL_curstack); 897 PL_stack_base = AvARRAY(PL_curstack);
447 PL_stack_sp = PL_stack_base; 898 PL_stack_sp = PL_stack_base;
448 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 899 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
449 900
450 New(50,PL_tmps_stack,96,SV*); 901 New(50,PL_tmps_stack,32,SV*);
451 PL_tmps_floor = -1; 902 PL_tmps_floor = -1;
452 PL_tmps_ix = -1; 903 PL_tmps_ix = -1;
453 PL_tmps_max = 96; 904 PL_tmps_max = 32;
454 905
455 New(54,PL_markstack,16,I32); 906 New(54,PL_markstack,16,I32);
456 PL_markstack_ptr = PL_markstack; 907 PL_markstack_ptr = PL_markstack;
457 PL_markstack_max = PL_markstack + 16; 908 PL_markstack_max = PL_markstack + 16;
458 909
459#ifdef SET_MARK_OFFSET 910#ifdef SET_MARK_OFFSET
460 SET_MARK_OFFSET; 911 SET_MARK_OFFSET;
461#endif 912#endif
462 913
463 New(54,PL_scopestack,16,I32); 914 New(54,PL_scopestack,8,I32);
464 PL_scopestack_ix = 0; 915 PL_scopestack_ix = 0;
465 PL_scopestack_max = 16; 916 PL_scopestack_max = 8;
917#if HAS_SCOPESTACK_NAME
918 New(54,PL_scopestack_name,8,const char*);
919#endif
466 920
467 New(54,PL_savestack,96,ANY); 921 New(54,PL_savestack,24,ANY);
468 PL_savestack_ix = 0; 922 PL_savestack_ix = 0;
469 PL_savestack_max = 96; 923 PL_savestack_max = 24;
470 924
471#if PERL_VERSION < 9 925#if !PERL_VERSION_ATLEAST (5,10,0)
472 New(54,PL_retstack,8,OP*); 926 New(54,PL_retstack,4,OP*);
473 PL_retstack_ix = 0; 927 PL_retstack_ix = 0;
474 PL_retstack_max = 8; 928 PL_retstack_max = 4;
475#endif 929#endif
476} 930}
931#endif
477 932
478/* 933/*
479 * destroy the stacks, the callchain etc... 934 * destroy the stacks, the callchain etc...
480 */ 935 */
481static void 936static void
482destroy_stacks() 937coro_destruct_stacks (pTHX)
483{ 938{
484 if (!IN_DESTRUCT)
485 {
486 /* is this ugly, I ask? */
487 LEAVE_SCOPE (0);
488
489 /* sure it is, but more important: is it correct?? :/ */
490 FREETMPS;
491
492 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
493 }
494
495 while (PL_curstackinfo->si_next) 939 while (PL_curstackinfo->si_next)
496 PL_curstackinfo = PL_curstackinfo->si_next; 940 PL_curstackinfo = PL_curstackinfo->si_next;
497 941
498 while (PL_curstackinfo) 942 while (PL_curstackinfo)
499 { 943 {
500 PERL_SI *p = PL_curstackinfo->si_prev; 944 PERL_SI *p = PL_curstackinfo->si_prev;
501 945
502 { /*D*//*remove*/
503 dSP;
504 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
505 PUTBACK; /* possibly superfluous */
506 }
507
508 if (!IN_DESTRUCT) 946 if (!IN_DESTRUCT)
509 {
510 dounwind (-1);/*D*//*remove*/
511 SvREFCNT_dec (PL_curstackinfo->si_stack); 947 SvREFCNT_dec (PL_curstackinfo->si_stack);
512 }
513 948
514 Safefree (PL_curstackinfo->si_cxstack); 949 Safefree (PL_curstackinfo->si_cxstack);
515 Safefree (PL_curstackinfo); 950 Safefree (PL_curstackinfo);
516 PL_curstackinfo = p; 951 PL_curstackinfo = p;
517 } 952 }
518 953
519 Safefree (PL_tmps_stack); 954 Safefree (PL_tmps_stack);
520 Safefree (PL_markstack); 955 Safefree (PL_markstack);
521 Safefree (PL_scopestack); 956 Safefree (PL_scopestack);
957#if HAS_SCOPESTACK_NAME
958 Safefree (PL_scopestack_name);
959#endif
522 Safefree (PL_savestack); 960 Safefree (PL_savestack);
523#if PERL_VERSION < 9 961#if !PERL_VERSION_ATLEAST (5,10,0)
524 Safefree (PL_retstack); 962 Safefree (PL_retstack);
525#endif 963#endif
526} 964}
527 965
966#define CORO_RSS \
967 rss += sizeof (SYM (curstackinfo)); \
968 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
969 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
970 rss += SYM (tmps_max) * sizeof (SV *); \
971 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
972 rss += SYM (scopestack_max) * sizeof (I32); \
973 rss += SYM (savestack_max) * sizeof (ANY);
974
975static size_t
976coro_rss (pTHX_ struct coro *coro)
977{
978 size_t rss = sizeof (*coro);
979
980 if (coro->mainstack)
981 {
982 if (coro->flags & CF_RUNNING)
983 {
984 #define SYM(sym) PL_ ## sym
985 CORO_RSS;
986 #undef SYM
987 }
988 else
989 {
990 #define SYM(sym) coro->slot->sym
991 CORO_RSS;
992 #undef SYM
993 }
994 }
995
996 return rss;
997}
998
999/** coroutine stack handling ************************************************/
1000
1001static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
1002static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
1003static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
1004
1005/* apparently < 5.8.8 */
1006#ifndef MgPV_nolen_const
1007#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
1008 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
1009 (const char*)(mg)->mg_ptr)
1010#endif
1011
1012/*
1013 * This overrides the default magic get method of %SIG elements.
1014 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
1015 * and instead of trying to save and restore the hash elements (extremely slow),
1016 * we just provide our own readback here.
1017 */
1018static int ecb_cold
1019coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
1020{
1021 const char *s = MgPV_nolen_const (mg);
1022
1023 if (*s == '_')
1024 {
1025 SV **svp = 0;
1026
1027 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1028 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1029
1030 if (svp)
1031 {
1032 SV *ssv;
1033
1034 if (!*svp)
1035 ssv = &PL_sv_undef;
1036 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1037 ssv = sv_2mortal (newRV_inc (*svp));
1038 else
1039 ssv = *svp;
1040
1041 sv_setsv (sv, ssv);
1042 return 0;
1043 }
1044 }
1045
1046 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1047}
1048
1049static int ecb_cold
1050coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1051{
1052 const char *s = MgPV_nolen_const (mg);
1053
1054 if (*s == '_')
1055 {
1056 SV **svp = 0;
1057
1058 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1059 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1060
1061 if (svp)
1062 {
1063 SV *old = *svp;
1064 *svp = 0;
1065 SvREFCNT_dec (old);
1066 return 0;
1067 }
1068 }
1069
1070 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1071}
1072
1073static int ecb_cold
1074coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1075{
1076 const char *s = MgPV_nolen_const (mg);
1077
1078 if (*s == '_')
1079 {
1080 SV **svp = 0;
1081
1082 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1083 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1084
1085 if (svp)
1086 {
1087 SV *old = *svp;
1088 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1089 SvREFCNT_dec (old);
1090 return 0;
1091 }
1092 }
1093
1094 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1095}
1096
1097static void
1098prepare_nop (pTHX_ struct coro_transfer_args *ta)
1099{
1100 /* kind of mega-hacky, but works */
1101 ta->next = ta->prev = (struct coro *)ta;
1102}
1103
528static void 1104static int
529setup_coro (struct coro *coro) 1105slf_check_nop (pTHX_ struct CoroSLF *frame)
1106{
1107 return 0;
1108}
1109
1110static int
1111slf_check_repeat (pTHX_ struct CoroSLF *frame)
1112{
1113 return 1;
1114}
1115
1116static UNOP init_perl_op;
1117
1118ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1119init_perl (pTHX_ struct coro *coro)
530{ 1120{
531 /* 1121 /*
532 * emulate part of the perl startup here. 1122 * emulate part of the perl startup here.
533 */ 1123 */
1124 coro_init_stacks (aTHX);
1125
1126 PL_runops = RUNOPS_DEFAULT;
1127 PL_curcop = &PL_compiling;
1128 PL_in_eval = EVAL_NULL;
1129 PL_comppad = 0;
1130 PL_comppad_name = 0;
1131 PL_comppad_name_fill = 0;
1132 PL_comppad_name_floor = 0;
1133 PL_curpm = 0;
1134 PL_curpad = 0;
1135 PL_localizing = 0;
1136 PL_restartop = 0;
1137#if PERL_VERSION_ATLEAST (5,10,0)
1138 PL_parser = 0;
1139#endif
1140 PL_hints = 0;
1141
1142 /* recreate the die/warn hooks */
1143 PL_diehook = SvREFCNT_inc (rv_diehook);
1144 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1145
1146 GvSV (PL_defgv) = newSV (0);
1147 GvAV (PL_defgv) = coro->args; coro->args = 0;
1148 GvSV (PL_errgv) = newSV (0);
1149 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1150 GvHV (PL_hintgv) = 0;
1151 PL_rs = newSVsv (GvSV (irsgv));
1152 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1153
1154 {
1155 dSP;
1156 UNOP myop;
1157
1158 Zero (&myop, 1, UNOP);
1159 myop.op_next = Nullop;
1160 myop.op_type = OP_ENTERSUB;
1161 myop.op_flags = OPf_WANT_VOID;
1162
1163 PUSHMARK (SP);
1164 PUSHs ((SV *)coro->startcv);
1165 PUTBACK;
1166 PL_op = (OP *)&myop;
1167 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1168 }
1169
1170 /* this newly created coroutine might be run on an existing cctx which most
1171 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1172 */
1173 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1174 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1175 slf_frame.destroy = 0;
1176
1177 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1178 init_perl_op.op_next = PL_op;
1179 init_perl_op.op_type = OP_ENTERSUB;
1180 init_perl_op.op_ppaddr = pp_slf;
1181 /* no flags etc. required, as an init function won't be called */
1182
1183 PL_op = (OP *)&init_perl_op;
1184
1185 /* copy throw, in case it was set before init_perl */
1186 CORO_THROW = coro->except;
1187
1188 SWAP_SVS (coro);
1189
1190 if (ecb_expect_false (enable_times))
1191 {
1192 coro_times_update ();
1193 coro_times_sub (coro);
1194 }
1195}
1196
1197static void
1198coro_unwind_stacks (pTHX)
1199{
1200 if (!IN_DESTRUCT)
1201 {
1202 /* restore all saved variables and stuff */
1203 LEAVE_SCOPE (0);
1204 assert (PL_tmps_floor == -1);
1205
1206 /* free all temporaries */
1207 FREETMPS;
1208 assert (PL_tmps_ix == -1);
1209
1210 /* unwind all extra stacks */
1211 POPSTACK_TO (PL_mainstack);
1212
1213 /* unwind main stack */
1214 dounwind (-1);
1215 }
1216}
1217
1218static void
1219destroy_perl (pTHX_ struct coro *coro)
1220{
1221 SV *svf [9];
1222
1223 {
1224 SV *old_current = SvRV (coro_current);
1225 struct coro *current = SvSTATE (old_current);
1226
1227 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1228
1229 save_perl (aTHX_ current);
1230
1231 /* this will cause transfer_check to croak on block*/
1232 SvRV_set (coro_current, (SV *)coro->hv);
1233
1234 load_perl (aTHX_ coro);
1235
1236 coro_unwind_stacks (aTHX);
1237
1238 /* restore swapped sv's */
1239 SWAP_SVS (coro);
1240
1241 coro_destruct_stacks (aTHX);
1242
1243 /* now save some sv's to be free'd later */
1244 svf [0] = GvSV (PL_defgv);
1245 svf [1] = (SV *)GvAV (PL_defgv);
1246 svf [2] = GvSV (PL_errgv);
1247 svf [3] = (SV *)PL_defoutgv;
1248 svf [4] = PL_rs;
1249 svf [5] = GvSV (irsgv);
1250 svf [6] = (SV *)GvHV (PL_hintgv);
1251 svf [7] = PL_diehook;
1252 svf [8] = PL_warnhook;
1253 assert (9 == sizeof (svf) / sizeof (*svf));
1254
1255 SvRV_set (coro_current, old_current);
1256
1257 load_perl (aTHX_ current);
1258 }
1259
1260 {
1261 unsigned int i;
1262
1263 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1264 SvREFCNT_dec (svf [i]);
1265
1266 SvREFCNT_dec (coro->saved_deffh);
1267 SvREFCNT_dec (coro->rouse_cb);
1268 SvREFCNT_dec (coro->invoke_cb);
1269 SvREFCNT_dec (coro->invoke_av);
1270 }
1271}
1272
1273ecb_inline void
1274free_coro_mortal (pTHX)
1275{
1276 if (ecb_expect_true (coro_mortal))
1277 {
1278 SvREFCNT_dec ((SV *)coro_mortal);
1279 coro_mortal = 0;
1280 }
1281}
1282
1283static int
1284runops_trace (pTHX)
1285{
1286 COP *oldcop = 0;
1287 int oldcxix = -2;
1288
1289 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1290 {
1291 PERL_ASYNC_CHECK ();
1292
1293 if (cctx_current->flags & CC_TRACE_ALL)
1294 {
1295 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1296 {
1297 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1298 SV **bot, **top;
1299 AV *av = newAV (); /* return values */
1300 SV **cb;
1301 dSP;
1302
1303 GV *gv = CvGV (cx->blk_sub.cv);
1304 SV *fullname = sv_2mortal (newSV (0));
1305 if (isGV (gv))
1306 gv_efullname3 (fullname, gv, 0);
1307
1308 bot = PL_stack_base + cx->blk_oldsp + 1;
1309 top = cx->blk_gimme == G_ARRAY ? SP + 1
1310 : cx->blk_gimme == G_SCALAR ? bot + 1
1311 : bot;
1312
1313 av_extend (av, top - bot);
1314 while (bot < top)
1315 av_push (av, SvREFCNT_inc_NN (*bot++));
1316
1317 PL_runops = RUNOPS_DEFAULT;
1318 ENTER;
1319 SAVETMPS;
1320 EXTEND (SP, 3);
1321 PUSHMARK (SP);
1322 PUSHs (&PL_sv_no);
1323 PUSHs (fullname);
1324 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1325 PUTBACK;
1326 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1327 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1328 SPAGAIN;
1329 FREETMPS;
1330 LEAVE;
1331 PL_runops = runops_trace;
1332 }
1333
1334 if (oldcop != PL_curcop)
1335 {
1336 oldcop = PL_curcop;
1337
1338 if (PL_curcop != &PL_compiling)
1339 {
1340 SV **cb;
1341
1342 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1343 {
1344 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1345
1346 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1347 {
1348 dSP;
1349 GV *gv = CvGV (cx->blk_sub.cv);
1350 SV *fullname = sv_2mortal (newSV (0));
1351
1352 if (isGV (gv))
1353 gv_efullname3 (fullname, gv, 0);
1354
1355 PL_runops = RUNOPS_DEFAULT;
1356 ENTER;
1357 SAVETMPS;
1358 EXTEND (SP, 3);
1359 PUSHMARK (SP);
1360 PUSHs (&PL_sv_yes);
1361 PUSHs (fullname);
1362 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1363 PUTBACK;
1364 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1365 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1366 SPAGAIN;
1367 FREETMPS;
1368 LEAVE;
1369 PL_runops = runops_trace;
1370 }
1371
1372 oldcxix = cxstack_ix;
1373 }
1374
1375 if (cctx_current->flags & CC_TRACE_LINE)
1376 {
1377 dSP;
1378
1379 PL_runops = RUNOPS_DEFAULT;
1380 ENTER;
1381 SAVETMPS;
1382 EXTEND (SP, 3);
1383 PL_runops = RUNOPS_DEFAULT;
1384 PUSHMARK (SP);
1385 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1386 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1387 PUTBACK;
1388 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1389 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1390 SPAGAIN;
1391 FREETMPS;
1392 LEAVE;
1393 PL_runops = runops_trace;
1394 }
1395 }
1396 }
1397 }
1398 }
1399
1400 TAINT_NOT;
1401 return 0;
1402}
1403
1404static struct CoroSLF cctx_ssl_frame;
1405
1406static void
1407slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1408{
1409 ta->prev = 0;
1410}
1411
1412static int
1413slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1414{
1415 *frame = cctx_ssl_frame;
1416
1417 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1418}
1419
1420/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1421static void ecb_noinline
1422cctx_prepare (pTHX)
1423{
1424 PL_top_env = &PL_start_env;
1425
1426 if (cctx_current->flags & CC_TRACE)
1427 PL_runops = runops_trace;
1428
1429 /* we already must be executing an SLF op, there is no other valid way
1430 * that can lead to creation of a new cctx */
1431 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1432 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1433
1434 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1435 cctx_ssl_frame = slf_frame;
1436
1437 slf_frame.prepare = slf_prepare_set_stacklevel;
1438 slf_frame.check = slf_check_set_stacklevel;
1439}
1440
1441/* the tail of transfer: execute stuff we can only do after a transfer */
1442ecb_inline void
1443transfer_tail (pTHX)
1444{
1445 free_coro_mortal (aTHX);
1446}
1447
1448/* try to exit the same way perl's main function would do */
1449/* we do not bother resetting the environment or other things *7
1450/* that are not, uhm, essential */
1451/* this obviously also doesn't work when perl is embedded */
1452static void ecb_noinline ecb_cold
1453perlish_exit (pTHX)
1454{
1455 int exitstatus = perl_destruct (PL_curinterp);
1456 perl_free (PL_curinterp);
1457 exit (exitstatus);
1458}
1459
1460/*
1461 * this is a _very_ stripped down perl interpreter ;)
1462 */
1463static void
1464cctx_run (void *arg)
1465{
1466#ifdef USE_ITHREADS
1467# if CORO_PTHREAD
1468 PERL_SET_CONTEXT (coro_thx);
1469# endif
1470#endif
1471 {
1472 dTHX;
1473
1474 /* normally we would need to skip the entersub here */
1475 /* not doing so will re-execute it, which is exactly what we want */
1476 /* PL_nop = PL_nop->op_next */
1477
1478 /* inject a fake subroutine call to cctx_init */
1479 cctx_prepare (aTHX);
1480
1481 /* cctx_run is the alternative tail of transfer() */
1482 transfer_tail (aTHX);
1483
1484 /* somebody or something will hit me for both perl_run and PL_restartop */
1485 PL_restartop = PL_op;
1486 perl_run (PL_curinterp);
1487 /*
1488 * Unfortunately, there is no way to get at the return values of the
1489 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1490 * runtime errors here, as this is just a random interpreter, not a thread.
1491 */
1492
1493 /*
1494 * If perl-run returns we assume exit() was being called or the coro
1495 * fell off the end, which seems to be the only valid (non-bug)
1496 * reason for perl_run to return. We try to mimic whatever perl is normally
1497 * doing in that case. YMMV.
1498 */
1499 perlish_exit (aTHX);
1500 }
1501}
1502
1503static coro_cctx *
1504cctx_new (void)
1505{
1506 coro_cctx *cctx;
1507
1508 ++cctx_count;
1509 New (0, cctx, 1, coro_cctx);
1510
1511 cctx->gen = cctx_gen;
1512 cctx->flags = 0;
1513 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1514
1515 return cctx;
1516}
1517
1518/* create a new cctx only suitable as source */
1519static coro_cctx *
1520cctx_new_empty (void)
1521{
1522 coro_cctx *cctx = cctx_new ();
1523
1524 cctx->sptr = 0;
1525 coro_create (&cctx->cctx, 0, 0, 0, 0);
1526
1527 return cctx;
1528}
1529
1530/* create a new cctx suitable as destination/running a perl interpreter */
1531static coro_cctx *
1532cctx_new_run (void)
1533{
1534 coro_cctx *cctx = cctx_new ();
1535 void *stack_start;
1536 size_t stack_size;
1537
1538#if HAVE_MMAP
1539 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1540 /* mmap supposedly does allocate-on-write for us */
1541 cctx->sptr = mmap (0, cctx->ssize, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_ANONYMOUS, -1, 0);
1542
1543 if (cctx->sptr != (void *)-1)
1544 {
1545 #if CORO_STACKGUARD
1546 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1547 #endif
1548 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1549 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1550 cctx->flags |= CC_MAPPED;
1551 }
1552 else
1553#endif
1554 {
1555 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1556 New (0, cctx->sptr, cctx_stacksize, long);
1557
1558 if (!cctx->sptr)
1559 {
1560 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1561 _exit (EXIT_FAILURE);
1562 }
1563
1564 stack_start = cctx->sptr;
1565 stack_size = cctx->ssize;
1566 }
1567
1568 #if CORO_USE_VALGRIND
1569 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1570 #endif
1571
1572 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1573
1574 return cctx;
1575}
1576
1577static void
1578cctx_destroy (coro_cctx *cctx)
1579{
1580 if (!cctx)
1581 return;
1582
1583 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1584
1585 --cctx_count;
1586 coro_destroy (&cctx->cctx);
1587
1588 /* coro_transfer creates new, empty cctx's */
1589 if (cctx->sptr)
1590 {
1591 #if CORO_USE_VALGRIND
1592 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1593 #endif
1594
1595#if HAVE_MMAP
1596 if (cctx->flags & CC_MAPPED)
1597 munmap (cctx->sptr, cctx->ssize);
1598 else
1599#endif
1600 Safefree (cctx->sptr);
1601 }
1602
1603 Safefree (cctx);
1604}
1605
1606/* wether this cctx should be destructed */
1607#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1608
1609static coro_cctx *
1610cctx_get (pTHX)
1611{
1612 while (ecb_expect_true (cctx_first))
1613 {
1614 coro_cctx *cctx = cctx_first;
1615 cctx_first = cctx->next;
1616 --cctx_idle;
1617
1618 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
1619 return cctx;
1620
1621 cctx_destroy (cctx);
1622 }
1623
1624 return cctx_new_run ();
1625}
1626
1627static void
1628cctx_put (coro_cctx *cctx)
1629{
1630 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1631
1632 /* free another cctx if overlimit */
1633 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1634 {
1635 coro_cctx *first = cctx_first;
1636 cctx_first = first->next;
1637 --cctx_idle;
1638
1639 cctx_destroy (first);
1640 }
1641
1642 ++cctx_idle;
1643 cctx->next = cctx_first;
1644 cctx_first = cctx;
1645}
1646
1647/** coroutine switching *****************************************************/
1648
1649static void
1650transfer_check (pTHX_ struct coro *prev, struct coro *next)
1651{
1652 /* TODO: throwing up here is considered harmful */
1653
1654 if (ecb_expect_true (prev != next))
1655 {
1656 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1657 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1658
1659 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1660 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1661
1662#if !PERL_VERSION_ATLEAST (5,10,0)
1663 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1664 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1665#endif
1666 }
1667}
1668
1669/* always use the TRANSFER macro */
1670static void ecb_noinline /* noinline so we have a fixed stackframe */
1671transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1672{
1673 dSTACKLEVEL;
1674
1675 /* sometimes transfer is only called to set idle_sp */
1676 if (ecb_expect_false (!prev))
1677 {
1678 cctx_current->idle_sp = STACKLEVEL;
1679 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1680 }
1681 else if (ecb_expect_true (prev != next))
1682 {
1683 coro_cctx *cctx_prev;
1684
1685 if (ecb_expect_false (prev->flags & CF_NEW))
1686 {
1687 /* create a new empty/source context */
1688 prev->flags &= ~CF_NEW;
1689 prev->flags |= CF_RUNNING;
1690 }
1691
1692 prev->flags &= ~CF_RUNNING;
1693 next->flags |= CF_RUNNING;
1694
1695 /* first get rid of the old state */
1696 save_perl (aTHX_ prev);
1697
1698 if (ecb_expect_false (next->flags & CF_NEW))
1699 {
1700 /* need to start coroutine */
1701 next->flags &= ~CF_NEW;
1702 /* setup coroutine call */
1703 init_perl (aTHX_ next);
1704 }
1705 else
1706 load_perl (aTHX_ next);
1707
1708 /* possibly untie and reuse the cctx */
1709 if (ecb_expect_true (
1710 cctx_current->idle_sp == STACKLEVEL
1711 && !(cctx_current->flags & CC_TRACE)
1712 && !force_cctx
1713 ))
1714 {
1715 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1716 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1717
1718 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1719 /* without this the next cctx_get might destroy the running cctx while still in use */
1720 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1721 if (ecb_expect_true (!next->cctx))
1722 next->cctx = cctx_get (aTHX);
1723
1724 cctx_put (cctx_current);
1725 }
1726 else
1727 prev->cctx = cctx_current;
1728
1729 ++next->usecount;
1730
1731 cctx_prev = cctx_current;
1732 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1733
1734 next->cctx = 0;
1735
1736 if (ecb_expect_false (cctx_prev != cctx_current))
1737 {
1738 cctx_prev->top_env = PL_top_env;
1739 PL_top_env = cctx_current->top_env;
1740 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1741 }
1742
1743 transfer_tail (aTHX);
1744 }
1745}
1746
1747#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1748#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1749
1750/** high level stuff ********************************************************/
1751
1752/* this function is actually Coro, not Coro::State, but we call it from here */
1753/* because it is convenient - but it hasn't been declared yet for that reason */
1754static void
1755coro_call_on_destroy (pTHX_ struct coro *coro);
1756
1757static void
1758coro_state_destroy (pTHX_ struct coro *coro)
1759{
1760 if (coro->flags & CF_ZOMBIE)
1761 return;
1762
1763 slf_destroy (aTHX_ coro);
1764
1765 coro->flags |= CF_ZOMBIE;
1766
1767 if (coro->flags & CF_READY)
1768 {
1769 /* reduce nready, as destroying a ready coro effectively unreadies it */
1770 /* alternative: look through all ready queues and remove the coro */
1771 --coro_nready;
1772 }
1773 else
1774 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1775
1776 if (coro->next) coro->next->prev = coro->prev;
1777 if (coro->prev) coro->prev->next = coro->next;
1778 if (coro == coro_first) coro_first = coro->next;
1779
1780 if (coro->mainstack
1781 && coro->mainstack != main_mainstack
1782 && coro->slot
1783 && !PL_dirty)
1784 destroy_perl (aTHX_ coro);
1785
1786 cctx_destroy (coro->cctx);
1787 SvREFCNT_dec (coro->startcv);
1788 SvREFCNT_dec (coro->args);
1789 SvREFCNT_dec (coro->swap_sv);
1790 SvREFCNT_dec (CORO_THROW);
1791
1792 coro_call_on_destroy (aTHX_ coro);
1793
1794 /* more destruction mayhem in coro_state_free */
1795}
1796
1797static int
1798coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1799{
1800 struct coro *coro = (struct coro *)mg->mg_ptr;
1801 mg->mg_ptr = 0;
1802
1803 coro_state_destroy (aTHX_ coro);
1804 SvREFCNT_dec (coro->on_destroy);
1805 SvREFCNT_dec (coro->status);
1806
1807 Safefree (coro);
1808
1809 return 0;
1810}
1811
1812static int ecb_cold
1813coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1814{
1815 /* called when perl clones the current process the slow way (windows process emulation) */
1816 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1817 mg->mg_ptr = 0;
1818 mg->mg_virtual = 0;
1819
1820 return 0;
1821}
1822
1823static MGVTBL coro_state_vtbl = {
1824 0, 0, 0, 0,
1825 coro_state_free,
1826 0,
1827#ifdef MGf_DUP
1828 coro_state_dup,
1829#else
1830# define MGf_DUP 0
1831#endif
1832};
1833
1834static void
1835prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1836{
1837 ta->prev = SvSTATE (prev_sv);
1838 ta->next = SvSTATE (next_sv);
1839 TRANSFER_CHECK (*ta);
1840}
1841
1842static void
1843api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1844{
1845 struct coro_transfer_args ta;
1846
1847 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1848 TRANSFER (ta, 1);
1849}
1850
1851/** Coro ********************************************************************/
1852
1853ecb_inline void
1854coro_enq (pTHX_ struct coro *coro)
1855{
1856 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1857
1858 SvREFCNT_inc_NN (coro->hv);
1859
1860 coro->next_ready = 0;
1861 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1862 ready [1] = coro;
1863}
1864
1865ecb_inline struct coro *
1866coro_deq (pTHX)
1867{
1868 int prio;
1869
1870 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1871 {
1872 struct coro **ready = coro_ready [prio];
1873
1874 if (ready [0])
1875 {
1876 struct coro *coro = ready [0];
1877 ready [0] = coro->next_ready;
1878 return coro;
1879 }
1880 }
1881
1882 return 0;
1883}
1884
1885static void
1886invoke_sv_ready_hook_helper (void)
1887{
534 dTHX; 1888 dTHX;
535 dSP; 1889 dSP;
536 UNOP myop;
537 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
538 1890
539 coro_init_stacks (); 1891 ENTER;
540 /*PL_curcop = 0;*/ 1892 SAVETMPS;
541 /*PL_in_eval = PL_in_eval;*/ /* inherit */
542 SvREFCNT_dec (GvAV (PL_defgv));
543 GvAV (PL_defgv) = coro->args; coro->args = 0;
544 1893
545 SPAGAIN;
546
547 Zero (&myop, 1, UNOP);
548 myop.op_next = Nullop;
549 myop.op_flags = OPf_WANT_VOID;
550
551 PL_op = (OP *)&myop;
552
553 PUSHMARK(SP); 1894 PUSHMARK (SP);
554 XPUSHs (sub_init);
555 PUTBACK; 1895 PUTBACK;
556 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1896 call_sv (coro_readyhook, G_VOID | G_DISCARD);
557 SPAGAIN;
558 1897
559 ENTER; /* necessary e.g. for dounwind */ 1898 FREETMPS;
1899 LEAVE;
560} 1900}
561 1901
562static void 1902static int
563free_coro_mortal () 1903api_ready (pTHX_ SV *coro_sv)
564{ 1904{
565 if (coro_mortal) 1905 struct coro *coro = SvSTATE (coro_sv);
566 {
567 SvREFCNT_dec (coro_mortal);
568 coro_mortal = 0;
569 }
570}
571 1906
572static void 1907 if (coro->flags & CF_READY)
573prepare_cctx (coro_stack *cctx)
574{
575 dSP;
576 UNOP myop;
577
578 Zero (&myop, 1, UNOP);
579 myop.op_next = PL_op;
580 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
581
582 PUSHMARK(SP);
583 EXTEND (SP, 2);
584 PUSHs (newSViv (PTR2IV (cctx)));
585 PUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
586 PUTBACK;
587 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
588 SPAGAIN;
589}
590
591static void
592coro_run (void *arg)
593{
594 /*
595 * this is a _very_ stripped down perl interpreter ;)
596 */
597 UNLOCK;
598
599 PL_top_env = &PL_start_env;
600 prepare_cctx ((coro_stack *)arg);
601
602 /* somebody will hit me for both perl_run and PL_restartop */
603 perl_run (PERL_GET_CONTEXT);
604
605 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
606 abort ();
607}
608
609static coro_stack *
610stack_new ()
611{
612 coro_stack *stack;
613
614 New (0, stack, 1, coro_stack);
615
616#if HAVE_MMAP
617
618 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
619 /* mmap suppsedly does allocate-on-write for us */
620 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
621
622 if (stack->sptr == (void *)-1)
623 {
624 perror ("FATAL: unable to mmap stack for coroutine");
625 _exit (EXIT_FAILURE);
626 }
627
628# if STACKGUARD
629 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
630# endif
631
632#else
633
634 stack->ssize = STACKSIZE * (long)sizeof (long);
635 New (0, stack->sptr, STACKSIZE, long);
636
637 if (!stack->sptr)
638 {
639 perror (stderr, "FATAL: unable to malloc stack for coroutine");
640 _exit (EXIT_FAILURE);
641 }
642
643#endif
644
645 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
646
647 return stack;
648}
649
650static void
651stack_free (coro_stack *stack)
652{
653 if (!stack)
654 return; 1908 return 0;
655 1909
656#if HAVE_MMAP 1910 coro->flags |= CF_READY;
657 munmap (stack->sptr, stack->ssize);
658#else
659 Safefree (stack->sptr);
660#endif
661 1911
662 Safefree (stack); 1912 coro_enq (aTHX_ coro);
663}
664 1913
665static coro_stack *stack_first; 1914 if (!coro_nready++)
1915 if (coroapi.readyhook)
1916 coroapi.readyhook ();
666 1917
667static coro_stack * 1918 return 1;
668stack_get () 1919}
669{
670 coro_stack *stack;
671 1920
672 if (stack_first) 1921static int
673 { 1922api_is_ready (pTHX_ SV *coro_sv)
674 stack = stack_first; 1923{
675 stack_first = stack->next; 1924 return !!(SvSTATE (coro_sv)->flags & CF_READY);
676 } 1925}
677 else 1926
1927/* expects to own a reference to next->hv */
1928ecb_inline void
1929prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1930{
1931 SV *prev_sv = SvRV (coro_current);
1932
1933 ta->prev = SvSTATE_hv (prev_sv);
1934 ta->next = next;
1935
1936 TRANSFER_CHECK (*ta);
1937
1938 SvRV_set (coro_current, (SV *)next->hv);
1939
1940 free_coro_mortal (aTHX);
1941 coro_mortal = prev_sv;
1942}
1943
1944static void
1945prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1946{
1947 for (;;)
678 { 1948 {
679 stack = stack_new (); 1949 struct coro *next = coro_deq (aTHX);
680 PL_op = PL_op->op_next;
681 }
682 1950
683 return stack; 1951 if (ecb_expect_true (next))
684}
685
686static void
687stack_put (coro_stack *stack)
688{
689 stack->next = stack_first;
690 stack_first = stack;
691}
692
693/* never call directly, always through the coro_state_transfer global variable */
694static void
695transfer_impl (struct coro *prev, struct coro *next, int flags)
696{
697 dSTACKLEVEL;
698
699 /* sometimes transfer is only called to set idle_sp */
700 if (flags == TRANSFER_SET_STACKLEVEL)
701 ((coro_stack *)prev)->idle_sp = STACKLEVEL;
702 else if (prev != next)
703 {
704 coro_stack *prev__stack;
705
706 LOCK;
707
708 if (next->mainstack)
709 { 1952 {
710 /* coroutine already started */ 1953 /* cannot transfer to destroyed coros, skip and look for next */
711 SAVE (prev, flags); 1954 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
712 LOAD (next); 1955 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1956 else
1957 {
1958 next->flags &= ~CF_READY;
1959 --coro_nready;
1960
1961 prepare_schedule_to (aTHX_ ta, next);
1962 break;
1963 }
713 } 1964 }
714 else 1965 else
715 { 1966 {
716 /* need to start coroutine */ 1967 /* nothing to schedule: call the idle handler */
717 /* first get rid of the old state */ 1968 if (SvROK (sv_idle)
718 SAVE (prev, -1); 1969 && SvOBJECT (SvRV (sv_idle)))
719 /* setup coroutine call */ 1970 {
720 setup_coro (next); 1971 if (SvRV (sv_idle) == SvRV (coro_current))
721 /* need a stack */ 1972 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
722 next->stack = 0; 1973
1974 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1975 api_ready (aTHX_ SvRV (sv_idle));
1976 --coro_nready;
1977 }
1978 else
1979 {
1980 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1981 dSP;
1982
1983 ENTER;
1984 SAVETMPS;
1985
1986 PUSHMARK (SP);
1987 PUTBACK;
1988 call_sv (sv_idle, G_VOID | G_DISCARD);
1989
1990 FREETMPS;
1991 LEAVE;
1992 }
723 } 1993 }
1994 }
1995}
724 1996
725 if (!prev->stack) 1997ecb_inline void
726 /* create a new empty context */ 1998prepare_cede (pTHX_ struct coro_transfer_args *ta)
727 Newz (0, prev->stack, 1, coro_stack); 1999{
2000 api_ready (aTHX_ coro_current);
2001 prepare_schedule (aTHX_ ta);
2002}
728 2003
729 prev__stack = prev->stack; 2004ecb_inline void
2005prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
2006{
2007 SV *prev = SvRV (coro_current);
730 2008
731 /* possibly "free" the stack */ 2009 if (coro_nready)
732 if (prev__stack->idle_sp == STACKLEVEL) 2010 {
2011 prepare_schedule (aTHX_ ta);
2012 api_ready (aTHX_ prev);
2013 }
2014 else
2015 prepare_nop (aTHX_ ta);
2016}
2017
2018static void
2019api_schedule (pTHX)
2020{
2021 struct coro_transfer_args ta;
2022
2023 prepare_schedule (aTHX_ &ta);
2024 TRANSFER (ta, 1);
2025}
2026
2027static void
2028api_schedule_to (pTHX_ SV *coro_sv)
2029{
2030 struct coro_transfer_args ta;
2031 struct coro *next = SvSTATE (coro_sv);
2032
2033 SvREFCNT_inc_NN (coro_sv);
2034 prepare_schedule_to (aTHX_ &ta, next);
2035}
2036
2037static int
2038api_cede (pTHX)
2039{
2040 struct coro_transfer_args ta;
2041
2042 prepare_cede (aTHX_ &ta);
2043
2044 if (ecb_expect_true (ta.prev != ta.next))
2045 {
2046 TRANSFER (ta, 1);
2047 return 1;
2048 }
2049 else
2050 return 0;
2051}
2052
2053static int
2054api_cede_notself (pTHX)
2055{
2056 if (coro_nready)
2057 {
2058 struct coro_transfer_args ta;
2059
2060 prepare_cede_notself (aTHX_ &ta);
2061 TRANSFER (ta, 1);
2062 return 1;
2063 }
2064 else
2065 return 0;
2066}
2067
2068static void
2069api_trace (pTHX_ SV *coro_sv, int flags)
2070{
2071 struct coro *coro = SvSTATE (coro_sv);
2072
2073 if (coro->flags & CF_RUNNING)
2074 croak ("cannot enable tracing on a running coroutine, caught");
2075
2076 if (flags & CC_TRACE)
2077 {
2078 if (!coro->cctx)
2079 coro->cctx = cctx_new_run ();
2080 else if (!(coro->cctx->flags & CC_TRACE))
2081 croak ("cannot enable tracing on coroutine with custom stack, caught");
2082
2083 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2084 }
2085 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2086 {
2087 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2088
2089 if (coro->flags & CF_RUNNING)
2090 PL_runops = RUNOPS_DEFAULT;
2091 else
2092 coro->slot->runops = RUNOPS_DEFAULT;
2093 }
2094}
2095
2096static void
2097coro_push_av (pTHX_ AV *av, I32 gimme_v)
2098{
2099 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2100 {
2101 dSP;
2102
2103 if (gimme_v == G_SCALAR)
2104 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2105 else
733 { 2106 {
734 stack_put (prev__stack); 2107 int i;
735 prev->stack = 0; 2108 EXTEND (SP, AvFILLp (av) + 1);
2109
2110 for (i = 0; i <= AvFILLp (av); ++i)
2111 PUSHs (AvARRAY (av)[i]);
736 } 2112 }
737 2113
738 if (!next->stack) 2114 PUTBACK;
739 next->stack = stack_get (); 2115 }
2116}
740 2117
741 if (prev__stack != next->stack) 2118static void
2119coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2120{
2121 if (!coro->on_destroy)
2122 coro->on_destroy = newAV ();
2123
2124 av_push (coro->on_destroy, cb);
2125}
2126
2127static void
2128slf_destroy_join (pTHX_ struct CoroSLF *frame)
2129{
2130 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2131}
2132
2133static int
2134slf_check_join (pTHX_ struct CoroSLF *frame)
2135{
2136 struct coro *coro = (struct coro *)frame->data;
2137
2138 if (!coro->status)
2139 return 1;
2140
2141 frame->destroy = 0;
2142
2143 coro_push_av (aTHX_ coro->status, GIMME_V);
2144
2145 SvREFCNT_dec ((SV *)coro->hv);
2146
2147 return 0;
2148}
2149
2150static void
2151slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2152{
2153 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2154
2155 if (items > 1)
2156 croak ("join called with too many arguments");
2157
2158 if (coro->status)
2159 frame->prepare = prepare_nop;
2160 else
2161 {
2162 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2163 frame->prepare = prepare_schedule;
2164 }
2165
2166 frame->check = slf_check_join;
2167 frame->destroy = slf_destroy_join;
2168 frame->data = (void *)coro;
2169 SvREFCNT_inc (coro->hv);
2170}
2171
2172static void
2173coro_call_on_destroy (pTHX_ struct coro *coro)
2174{
2175 AV *od = coro->on_destroy;
2176
2177 if (!od)
2178 return;
2179
2180 while (AvFILLp (od) >= 0)
2181 {
2182 SV *cb = sv_2mortal (av_pop (od));
2183
2184 /* coro hv's (and only hv's at the moment) are supported as well */
2185 if (SvSTATEhv_p (aTHX_ cb))
2186 api_ready (aTHX_ cb);
2187 else
742 { 2188 {
743 prev__stack->top_env = PL_top_env; 2189 dSP; /* don't disturb outer sp */
744 PL_top_env = next->stack->top_env; 2190 PUSHMARK (SP);
745 coro_transfer (&prev__stack->cctx, &next->stack->cctx); 2191
2192 if (coro->status)
2193 {
2194 PUTBACK;
2195 coro_push_av (aTHX_ coro->status, G_ARRAY);
2196 SPAGAIN;
2197 }
2198
2199 PUTBACK;
2200 call_sv (cb, G_VOID | G_DISCARD);
746 } 2201 }
747
748 free_coro_mortal ();
749
750 UNLOCK;
751 }
752}
753
754/* use this function pointer to call the above function */
755/* this is done to increase chances of the compiler not inlining the call */
756/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
757void (*coro_state_transfer)(struct coro *prev, struct coro *next, int flags) = transfer_impl;
758
759struct transfer_args
760{
761 struct coro *prev, *next;
762 int flags;
763};
764
765#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
766
767static void
768coro_state_destroy (struct coro *coro)
769{
770 if (coro->refcnt--)
771 return;
772
773 if (coro->mainstack && coro->mainstack != main_mainstack)
774 { 2202 }
775 struct coro temp; 2203}
776 2204
777 SAVE ((&temp), TRANSFER_SAVE_ALL); 2205static void
778 LOAD (coro); 2206coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
779 2207{
780 destroy_stacks (); 2208 AV *av;
781 2209
782 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 2210 if (coro->status)
783
784 coro->mainstack = 0;
785 } 2211 {
2212 av = coro->status;
2213 av_clear (av);
2214 }
2215 else
2216 av = coro->status = newAV ();
786 2217
787 stack_free (coro->stack); 2218 /* items are actually not so common, so optimise for this case */
788 SvREFCNT_dec (coro->args); 2219 if (items)
789 Safefree (coro); 2220 {
2221 int i;
2222
2223 av_extend (av, items - 1);
2224
2225 for (i = 0; i < items; ++i)
2226 av_push (av, SvREFCNT_inc_NN (arg [i]));
2227 }
2228}
2229
2230static void
2231slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2232{
2233 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2234 api_ready (aTHX_ sv_manager);
2235
2236 frame->prepare = prepare_schedule;
2237 frame->check = slf_check_repeat;
2238
2239 /* as a minor optimisation, we could unwind all stacks here */
2240 /* but that puts extra pressure on pp_slf, and is not worth much */
2241 /*coro_unwind_stacks (aTHX);*/
2242}
2243
2244static void
2245slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2246{
2247 HV *coro_hv = (HV *)SvRV (coro_current);
2248
2249 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2250 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2251}
2252
2253static void
2254slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2255{
2256 HV *coro_hv;
2257 struct coro *coro;
2258
2259 if (items <= 0)
2260 croak ("Coro::cancel called without coro object,");
2261
2262 coro = SvSTATE (arg [0]);
2263 coro_hv = coro->hv;
2264
2265 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2266
2267 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2268 {
2269 /* coro currently busy cancelling something, so just notify it */
2270 coro->slf_frame.data = (void *)coro;
2271
2272 frame->prepare = prepare_nop;
2273 frame->check = slf_check_nop;
2274 }
2275 else if (coro_hv == (HV *)SvRV (coro_current))
2276 {
2277 /* cancelling the current coro is allowed, and equals terminate */
2278 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2279 }
2280 else
2281 {
2282 struct coro *self = SvSTATE_current;
2283
2284 /* otherwise we cancel directly, purely for speed reasons
2285 * unfortunately, this requires some magic trickery, as
2286 * somebody else could cancel us, so we have to fight the cancellation.
2287 * this is ugly, and hopefully fully worth the extra speed.
2288 * besides, I can't get the slow-but-safe version working...
2289 */
2290 slf_frame.data = 0;
2291 self->flags |= CF_NOCANCEL;
2292 coro_state_destroy (aTHX_ coro);
2293 self->flags &= ~CF_NOCANCEL;
2294
2295 if (slf_frame.data)
2296 {
2297 /* while we were busy we have been cancelled, so terminate */
2298 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2299 }
2300 else
2301 {
2302 frame->prepare = prepare_nop;
2303 frame->check = slf_check_nop;
2304 }
2305 }
790} 2306}
791 2307
792static int 2308static int
793coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 2309slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
794{ 2310{
795 struct coro *coro = (struct coro *)mg->mg_ptr; 2311 frame->prepare = 0;
796 mg->mg_ptr = 0; 2312 coro_unwind_stacks (aTHX);
797 2313
798 coro_state_destroy (coro); 2314 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
799 2315
800 return 0; 2316 return 1;
801} 2317}
802 2318
803static int 2319static int
804coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 2320safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
805{ 2321{
806 struct coro *coro = (struct coro *)mg->mg_ptr; 2322 if (coro->cctx)
2323 croak ("coro inside C callback, unable to cancel at this time, caught");
807 2324
808 ++coro->refcnt; 2325 if (coro->flags & CF_NEW)
2326 {
2327 coro_set_status (aTHX_ coro, arg, items);
2328 coro_state_destroy (aTHX_ coro);
2329 }
2330 else
2331 {
2332 if (!coro->slf_frame.prepare)
2333 croak ("coro outside an SLF function, unable to cancel at this time, caught");
809 2334
2335 slf_destroy (aTHX_ coro);
2336
2337 coro_set_status (aTHX_ coro, arg, items);
2338 coro->slf_frame.prepare = prepare_nop;
2339 coro->slf_frame.check = slf_check_safe_cancel;
2340
2341 api_ready (aTHX_ (SV *)coro->hv);
2342 }
2343
810 return 0; 2344 return 1;
811} 2345}
812 2346
813static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };
814
815static struct coro *
816SvSTATE (SV *coro)
817{
818 HV *stash;
819 MAGIC *mg;
820
821 if (SvROK (coro))
822 coro = SvRV (coro);
823
824 stash = SvSTASH (coro);
825 if (stash != coro_stash && stash != coro_state_stash)
826 {
827 /* very slow, but rare, check */
828 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
829 croak ("Coro::State object required");
830 }
831
832 mg = SvMAGIC (coro);
833 assert (mg->mg_type == PERL_MAGIC_ext);
834 return (struct coro *)mg->mg_ptr;
835}
836
837static void
838prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
839{
840 ta->prev = SvSTATE (prev);
841 ta->next = SvSTATE (next);
842 ta->flags = flags;
843}
844
845static void
846api_transfer (SV *prev, SV *next, int flags)
847{
848 dTHX;
849 struct transfer_args ta;
850
851 prepare_transfer (&ta, prev, next, flags);
852 TRANSFER (ta);
853}
854
855/** Coro ********************************************************************/ 2347/*****************************************************************************/
2348/* async pool handler */
856 2349
857#define PRIO_MAX 3
858#define PRIO_HIGH 1
859#define PRIO_NORMAL 0
860#define PRIO_LOW -1
861#define PRIO_IDLE -3
862#define PRIO_MIN -4
863
864/* for Coro.pm */
865static GV *coro_current, *coro_idle;
866static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
867static int coro_nready;
868
869static void 2350static int
870coro_enq (SV *sv) 2351slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
871{ 2352{
872 int prio; 2353 HV *hv = (HV *)SvRV (coro_current);
2354 struct coro *coro = (struct coro *)frame->data;
873 2355
874 if (SvTYPE (sv) != SVt_PVHV) 2356 if (!coro->invoke_cb)
875 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 2357 return 1; /* loop till we have invoke */
876 2358 else
877 prio = SvSTATE (sv)->prio;
878
879 av_push (coro_ready [prio - PRIO_MIN], sv);
880 coro_nready++;
881}
882
883static SV *
884coro_deq (int min_prio)
885{
886 int prio = PRIO_MAX - PRIO_MIN;
887
888 min_prio -= PRIO_MIN;
889 if (min_prio < 0)
890 min_prio = 0;
891
892 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
893 if (AvFILLp (coro_ready [prio]) >= 0)
894 { 2359 {
895 coro_nready--; 2360 hv_store (hv, "desc", sizeof ("desc") - 1,
896 return av_shift (coro_ready [prio]); 2361 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
897 }
898 2362
899 return 0; 2363 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
900}
901
902static void
903api_ready (SV *coro)
904{
905 dTHX;
906
907 if (SvROK (coro))
908 coro = SvRV (coro);
909
910 LOCK;
911 coro_enq (SvREFCNT_inc (coro));
912 UNLOCK;
913}
914
915static void
916prepare_schedule (struct transfer_args *ta)
917{
918 SV *current, *prev, *next;
919
920 current = GvSV (coro_current);
921
922 for (;;)
923 {
924 LOCK;
925 next = coro_deq (PRIO_MIN);
926 UNLOCK;
927
928 if (next)
929 break;
930 2364
931 { 2365 {
932 dSP; 2366 dSP;
933 2367 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
934 ENTER;
935 SAVETMPS;
936
937 PUSHMARK (SP);
938 PUTBACK; 2368 PUTBACK;
939 call_sv (GvSV (coro_idle), G_DISCARD);
940
941 FREETMPS;
942 LEAVE;
943 } 2369 }
2370
2371 SvREFCNT_dec (GvAV (PL_defgv));
2372 GvAV (PL_defgv) = coro->invoke_av;
2373 coro->invoke_av = 0;
2374
2375 return 0;
2376 }
2377}
2378
2379static void
2380slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2381{
2382 HV *hv = (HV *)SvRV (coro_current);
2383 struct coro *coro = SvSTATE_hv ((SV *)hv);
2384
2385 if (ecb_expect_true (coro->saved_deffh))
944 } 2386 {
2387 /* subsequent iteration */
2388 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2389 coro->saved_deffh = 0;
945 2390
946 prev = SvRV (current); 2391 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
947 SvRV (current) = next; 2392 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2393 {
2394 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2395 return;
2396 }
2397 else
2398 {
2399 av_clear (GvAV (PL_defgv));
2400 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
948 2401
949 /* free this only after the transfer */ 2402 coro->prio = 0;
950 LOCK;
951 free_coro_mortal ();
952 UNLOCK;
953 coro_mortal = prev;
954 2403
955 ta->prev = SvSTATE (prev); 2404 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
956 ta->next = SvSTATE (next); 2405 api_trace (aTHX_ coro_current, 0);
957 ta->flags = TRANSFER_SAVE_ALL;
958}
959 2406
2407 frame->prepare = prepare_schedule;
2408 av_push (av_async_pool, SvREFCNT_inc (hv));
2409 }
2410 }
2411 else
2412 {
2413 /* first iteration, simply fall through */
2414 frame->prepare = prepare_nop;
2415 }
2416
2417 frame->check = slf_check_pool_handler;
2418 frame->data = (void *)coro;
2419}
2420
2421/*****************************************************************************/
2422/* rouse callback */
2423
2424#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2425
2426static void
2427coro_rouse_callback (pTHX_ CV *cv)
2428{
2429 dXSARGS;
2430 SV *data = (SV *)S_GENSUB_ARG;
2431
2432 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2433 {
2434 /* first call, set args */
2435 SV *coro = SvRV (data);
2436 AV *av = newAV ();
2437
2438 SvRV_set (data, (SV *)av);
2439
2440 /* better take a full copy of the arguments */
2441 while (items--)
2442 av_store (av, items, newSVsv (ST (items)));
2443
2444 api_ready (aTHX_ coro);
2445 SvREFCNT_dec (coro);
2446 }
2447
2448 XSRETURN_EMPTY;
2449}
2450
960static void 2451static int
2452slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2453{
2454 SV *data = (SV *)frame->data;
2455
2456 if (CORO_THROW)
2457 return 0;
2458
2459 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2460 return 1;
2461
2462 /* now push all results on the stack */
2463 {
2464 dSP;
2465 AV *av = (AV *)SvRV (data);
2466 int i;
2467
2468 EXTEND (SP, AvFILLp (av) + 1);
2469 for (i = 0; i <= AvFILLp (av); ++i)
2470 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2471
2472 /* we have stolen the elements, so set length to zero and free */
2473 AvFILLp (av) = -1;
2474 av_undef (av);
2475
2476 PUTBACK;
2477 }
2478
2479 return 0;
2480}
2481
2482static void
2483slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2484{
2485 SV *cb;
2486
2487 if (items)
2488 cb = arg [0];
2489 else
2490 {
2491 struct coro *coro = SvSTATE_current;
2492
2493 if (!coro->rouse_cb)
2494 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2495
2496 cb = sv_2mortal (coro->rouse_cb);
2497 coro->rouse_cb = 0;
2498 }
2499
2500 if (!SvROK (cb)
2501 || SvTYPE (SvRV (cb)) != SVt_PVCV
2502 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2503 croak ("Coro::rouse_wait called with illegal callback argument,");
2504
2505 {
2506 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2507 SV *data = (SV *)S_GENSUB_ARG;
2508
2509 frame->data = (void *)data;
2510 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2511 frame->check = slf_check_rouse_wait;
2512 }
2513}
2514
2515static SV *
2516coro_new_rouse_cb (pTHX)
2517{
2518 HV *hv = (HV *)SvRV (coro_current);
2519 struct coro *coro = SvSTATE_hv (hv);
2520 SV *data = newRV_inc ((SV *)hv);
2521 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2522
2523 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2524 SvREFCNT_dec (data); /* magicext increases the refcount */
2525
2526 SvREFCNT_dec (coro->rouse_cb);
2527 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2528
2529 return cb;
2530}
2531
2532/*****************************************************************************/
2533/* schedule-like-function opcode (SLF) */
2534
2535static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2536static const CV *slf_cv;
2537static SV **slf_argv;
2538static int slf_argc, slf_arga; /* count, allocated */
2539static I32 slf_ax; /* top of stack, for restore */
2540
2541/* this restores the stack in the case we patched the entersub, to */
2542/* recreate the stack frame as perl will on following calls */
2543/* since entersub cleared the stack */
2544static OP *
2545pp_restore (pTHX)
2546{
2547 int i;
2548 SV **SP = PL_stack_base + slf_ax;
2549
2550 PUSHMARK (SP);
2551
2552 EXTEND (SP, slf_argc + 1);
2553
2554 for (i = 0; i < slf_argc; ++i)
2555 PUSHs (sv_2mortal (slf_argv [i]));
2556
2557 PUSHs ((SV *)CvGV (slf_cv));
2558
2559 RETURNOP (slf_restore.op_first);
2560}
2561
2562static void
2563slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2564{
2565 SV **arg = (SV **)slf_frame.data;
2566
2567 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2568}
2569
2570static void
2571slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2572{
2573 if (items != 2)
2574 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2575
2576 frame->prepare = slf_prepare_transfer;
2577 frame->check = slf_check_nop;
2578 frame->data = (void *)arg; /* let's hope it will stay valid */
2579}
2580
2581static void
2582slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2583{
2584 frame->prepare = prepare_schedule;
2585 frame->check = slf_check_nop;
2586}
2587
2588static void
961prepare_cede (struct transfer_args *ta) 2589slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
962{ 2590{
963 LOCK; 2591 struct coro *next = (struct coro *)slf_frame.data;
964 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
965 UNLOCK;
966 2592
2593 SvREFCNT_inc_NN (next->hv);
967 prepare_schedule (ta); 2594 prepare_schedule_to (aTHX_ ta, next);
968} 2595}
969 2596
970static void 2597static void
971api_schedule (void) 2598slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
972{ 2599{
973 dTHX; 2600 if (!items)
2601 croak ("Coro::schedule_to expects a coroutine argument, caught");
2602
2603 frame->data = (void *)SvSTATE (arg [0]);
2604 frame->prepare = slf_prepare_schedule_to;
2605 frame->check = slf_check_nop;
2606}
2607
2608static void
2609slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2610{
2611 api_ready (aTHX_ SvRV (coro_current));
2612
2613 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2614}
2615
2616static void
2617slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2618{
2619 frame->prepare = prepare_cede;
2620 frame->check = slf_check_nop;
2621}
2622
2623static void
2624slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2625{
2626 frame->prepare = prepare_cede_notself;
2627 frame->check = slf_check_nop;
2628}
2629
2630/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2631static void
2632slf_destroy (pTHX_ struct coro *coro)
2633{
2634 /* this callback is reserved for slf functions needing to do cleanup */
2635 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2636 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2637
2638 /*
2639 * The on_destroy above most likely is from an SLF call.
2640 * Since by definition the SLF call will not finish when we destroy
2641 * the coro, we will have to force-finish it here, otherwise
2642 * cleanup functions cannot call SLF functions.
2643 */
2644 coro->slf_frame.prepare = 0;
2645}
2646
2647/*
2648 * these not obviously related functions are all rolled into one
2649 * function to increase chances that they all will call transfer with the same
2650 * stack offset
2651 * SLF stands for "schedule-like-function".
2652 */
2653static OP *
2654pp_slf (pTHX)
2655{
2656 I32 checkmark; /* mark SP to see how many elements check has pushed */
2657
2658 /* set up the slf frame, unless it has already been set-up */
2659 /* the latter happens when a new coro has been started */
2660 /* or when a new cctx was attached to an existing coroutine */
2661 if (ecb_expect_true (!slf_frame.prepare))
2662 {
2663 /* first iteration */
2664 dSP;
2665 SV **arg = PL_stack_base + TOPMARK + 1;
2666 int items = SP - arg; /* args without function object */
2667 SV *gv = *sp;
2668
2669 /* do a quick consistency check on the "function" object, and if it isn't */
2670 /* for us, divert to the real entersub */
2671 if (SvTYPE (gv) != SVt_PVGV
2672 || !GvCV (gv)
2673 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2674 return PL_ppaddr[OP_ENTERSUB](aTHX);
2675
2676 if (!(PL_op->op_flags & OPf_STACKED))
2677 {
2678 /* ampersand-form of call, use @_ instead of stack */
2679 AV *av = GvAV (PL_defgv);
2680 arg = AvARRAY (av);
2681 items = AvFILLp (av) + 1;
2682 }
2683
2684 /* now call the init function, which needs to set up slf_frame */
2685 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2686 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2687
2688 /* pop args */
2689 SP = PL_stack_base + POPMARK;
2690
2691 PUTBACK;
2692 }
2693
2694 /* now that we have a slf_frame, interpret it! */
2695 /* we use a callback system not to make the code needlessly */
2696 /* complicated, but so we can run multiple perl coros from one cctx */
2697
2698 do
2699 {
974 struct transfer_args ta; 2700 struct coro_transfer_args ta;
975 2701
976 prepare_schedule (&ta); 2702 slf_frame.prepare (aTHX_ &ta);
977 TRANSFER (ta); 2703 TRANSFER (ta, 0);
978}
979 2704
2705 checkmark = PL_stack_sp - PL_stack_base;
2706 }
2707 while (slf_frame.check (aTHX_ &slf_frame));
2708
2709 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2710
2711 /* exception handling */
2712 if (ecb_expect_false (CORO_THROW))
2713 {
2714 SV *exception = sv_2mortal (CORO_THROW);
2715
2716 CORO_THROW = 0;
2717 sv_setsv (ERRSV, exception);
2718 croak (0);
2719 }
2720
2721 /* return value handling - mostly like entersub */
2722 /* make sure we put something on the stack in scalar context */
2723 if (GIMME_V == G_SCALAR
2724 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2725 {
2726 dSP;
2727 SV **bot = PL_stack_base + checkmark;
2728
2729 if (sp == bot) /* too few, push undef */
2730 bot [1] = &PL_sv_undef;
2731 else /* too many, take last one */
2732 bot [1] = *sp;
2733
2734 SP = bot + 1;
2735
2736 PUTBACK;
2737 }
2738
2739 return NORMAL;
2740}
2741
2742static void
2743api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2744{
2745 int i;
2746 SV **arg = PL_stack_base + ax;
2747 int items = PL_stack_sp - arg + 1;
2748
2749 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2750
2751 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2752 && PL_op->op_ppaddr != pp_slf)
2753 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2754
2755 CvFLAGS (cv) |= CVf_SLF;
2756 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2757 slf_cv = cv;
2758
2759 /* we patch the op, and then re-run the whole call */
2760 /* we have to put the same argument on the stack for this to work */
2761 /* and this will be done by pp_restore */
2762 slf_restore.op_next = (OP *)&slf_restore;
2763 slf_restore.op_type = OP_CUSTOM;
2764 slf_restore.op_ppaddr = pp_restore;
2765 slf_restore.op_first = PL_op;
2766
2767 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2768
2769 if (PL_op->op_flags & OPf_STACKED)
2770 {
2771 if (items > slf_arga)
2772 {
2773 slf_arga = items;
2774 Safefree (slf_argv);
2775 New (0, slf_argv, slf_arga, SV *);
2776 }
2777
2778 slf_argc = items;
2779
2780 for (i = 0; i < items; ++i)
2781 slf_argv [i] = SvREFCNT_inc (arg [i]);
2782 }
2783 else
2784 slf_argc = 0;
2785
2786 PL_op->op_ppaddr = pp_slf;
2787 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2788
2789 PL_op = (OP *)&slf_restore;
2790}
2791
2792/*****************************************************************************/
2793/* dynamic wind */
2794
2795static void
2796on_enterleave_call (pTHX_ SV *cb)
2797{
2798 dSP;
2799
2800 PUSHSTACK;
2801
2802 PUSHMARK (SP);
2803 PUTBACK;
2804 call_sv (cb, G_VOID | G_DISCARD);
2805 SPAGAIN;
2806
2807 POPSTACK;
2808}
2809
2810static SV *
2811coro_avp_pop_and_free (pTHX_ AV **avp)
2812{
2813 AV *av = *avp;
2814 SV *res = av_pop (av);
2815
2816 if (AvFILLp (av) < 0)
2817 {
2818 *avp = 0;
2819 SvREFCNT_dec (av);
2820 }
2821
2822 return res;
2823}
2824
2825static void
2826coro_pop_on_enter (pTHX_ void *coro)
2827{
2828 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2829 SvREFCNT_dec (cb);
2830}
2831
2832static void
2833coro_pop_on_leave (pTHX_ void *coro)
2834{
2835 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2836 on_enterleave_call (aTHX_ sv_2mortal (cb));
2837}
2838
2839/*****************************************************************************/
2840/* PerlIO::cede */
2841
2842typedef struct
2843{
2844 PerlIOBuf base;
2845 NV next, every;
2846} PerlIOCede;
2847
2848static IV ecb_cold
2849PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2850{
2851 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2852
2853 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2854 self->next = nvtime () + self->every;
2855
2856 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2857}
2858
2859static SV * ecb_cold
2860PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2861{
2862 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2863
2864 return newSVnv (self->every);
2865}
2866
2867static IV
2868PerlIOCede_flush (pTHX_ PerlIO *f)
2869{
2870 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2871 double now = nvtime ();
2872
2873 if (now >= self->next)
2874 {
2875 api_cede (aTHX);
2876 self->next = now + self->every;
2877 }
2878
2879 return PerlIOBuf_flush (aTHX_ f);
2880}
2881
2882static PerlIO_funcs PerlIO_cede =
2883{
2884 sizeof(PerlIO_funcs),
2885 "cede",
2886 sizeof(PerlIOCede),
2887 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2888 PerlIOCede_pushed,
2889 PerlIOBuf_popped,
2890 PerlIOBuf_open,
2891 PerlIOBase_binmode,
2892 PerlIOCede_getarg,
2893 PerlIOBase_fileno,
2894 PerlIOBuf_dup,
2895 PerlIOBuf_read,
2896 PerlIOBuf_unread,
2897 PerlIOBuf_write,
2898 PerlIOBuf_seek,
2899 PerlIOBuf_tell,
2900 PerlIOBuf_close,
2901 PerlIOCede_flush,
2902 PerlIOBuf_fill,
2903 PerlIOBase_eof,
2904 PerlIOBase_error,
2905 PerlIOBase_clearerr,
2906 PerlIOBase_setlinebuf,
2907 PerlIOBuf_get_base,
2908 PerlIOBuf_bufsiz,
2909 PerlIOBuf_get_ptr,
2910 PerlIOBuf_get_cnt,
2911 PerlIOBuf_set_ptrcnt,
2912};
2913
2914/*****************************************************************************/
2915/* Coro::Semaphore & Coro::Signal */
2916
2917static SV *
2918coro_waitarray_new (pTHX_ int count)
2919{
2920 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2921 AV *av = newAV ();
2922 SV **ary;
2923
2924 /* unfortunately, building manually saves memory */
2925 Newx (ary, 2, SV *);
2926 AvALLOC (av) = ary;
2927#if PERL_VERSION_ATLEAST (5,10,0)
2928 AvARRAY (av) = ary;
2929#else
2930 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2931 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2932 SvPVX ((SV *)av) = (char *)ary;
2933#endif
2934 AvMAX (av) = 1;
2935 AvFILLp (av) = 0;
2936 ary [0] = newSViv (count);
2937
2938 return newRV_noinc ((SV *)av);
2939}
2940
2941/* semaphore */
2942
2943static void
2944coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2945{
2946 SV *count_sv = AvARRAY (av)[0];
2947 IV count = SvIVX (count_sv);
2948
2949 count += adjust;
2950 SvIVX (count_sv) = count;
2951
2952 /* now wake up as many waiters as are expected to lock */
2953 while (count > 0 && AvFILLp (av) > 0)
2954 {
2955 SV *cb;
2956
2957 /* swap first two elements so we can shift a waiter */
2958 AvARRAY (av)[0] = AvARRAY (av)[1];
2959 AvARRAY (av)[1] = count_sv;
2960 cb = av_shift (av);
2961
2962 if (SvOBJECT (cb))
2963 {
2964 api_ready (aTHX_ cb);
2965 --count;
2966 }
2967 else if (SvTYPE (cb) == SVt_PVCV)
2968 {
2969 dSP;
2970 PUSHMARK (SP);
2971 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2972 PUTBACK;
2973 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2974 }
2975
2976 SvREFCNT_dec (cb);
2977 }
2978}
2979
2980static void
2981coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2982{
2983 /* call $sem->adjust (0) to possibly wake up some other waiters */
2984 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2985}
2986
980static void 2987static int
981api_cede (void) 2988slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
982{ 2989{
983 dTHX; 2990 AV *av = (AV *)frame->data;
984 struct transfer_args ta; 2991 SV *count_sv = AvARRAY (av)[0];
2992 SV *coro_hv = SvRV (coro_current);
985 2993
986 prepare_cede (&ta); 2994 /* if we are about to throw, don't actually acquire the lock, just throw */
987 TRANSFER (ta); 2995 if (CORO_THROW)
988} 2996 return 0;
2997 else if (SvIVX (count_sv) > 0)
2998 {
2999 frame->destroy = 0;
989 3000
3001 if (acquire)
3002 SvIVX (count_sv) = SvIVX (count_sv) - 1;
3003 else
3004 coro_semaphore_adjust (aTHX_ av, 0);
3005
3006 return 0;
3007 }
3008 else
3009 {
3010 int i;
3011 /* if we were woken up but can't down, we look through the whole */
3012 /* waiters list and only add us if we aren't in there already */
3013 /* this avoids some degenerate memory usage cases */
3014 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
3015 if (AvARRAY (av)[i] == coro_hv)
3016 return 1;
3017
3018 av_push (av, SvREFCNT_inc (coro_hv));
3019 return 1;
3020 }
3021}
3022
3023static int
3024slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
3025{
3026 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
3027}
3028
3029static int
3030slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
3031{
3032 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3033}
3034
3035static void
3036slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3037{
3038 AV *av = (AV *)SvRV (arg [0]);
3039
3040 if (SvIVX (AvARRAY (av)[0]) > 0)
3041 {
3042 frame->data = (void *)av;
3043 frame->prepare = prepare_nop;
3044 }
3045 else
3046 {
3047 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3048
3049 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3050 frame->prepare = prepare_schedule;
3051 /* to avoid race conditions when a woken-up coro gets terminated */
3052 /* we arrange for a temporary on_destroy that calls adjust (0) */
3053 frame->destroy = coro_semaphore_destroy;
3054 }
3055}
3056
3057static void
3058slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3059{
3060 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3061 frame->check = slf_check_semaphore_down;
3062}
3063
3064static void
3065slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3066{
3067 if (items >= 2)
3068 {
3069 /* callback form */
3070 AV *av = (AV *)SvRV (arg [0]);
3071 SV *cb_cv = s_get_cv_croak (arg [1]);
3072
3073 av_push (av, SvREFCNT_inc_NN (cb_cv));
3074
3075 if (SvIVX (AvARRAY (av)[0]) > 0)
3076 coro_semaphore_adjust (aTHX_ av, 0);
3077
3078 frame->prepare = prepare_nop;
3079 frame->check = slf_check_nop;
3080 }
3081 else
3082 {
3083 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3084 frame->check = slf_check_semaphore_wait;
3085 }
3086}
3087
3088/* signal */
3089
3090static void
3091coro_signal_wake (pTHX_ AV *av, int count)
3092{
3093 SvIVX (AvARRAY (av)[0]) = 0;
3094
3095 /* now signal count waiters */
3096 while (count > 0 && AvFILLp (av) > 0)
3097 {
3098 SV *cb;
3099
3100 /* swap first two elements so we can shift a waiter */
3101 cb = AvARRAY (av)[0];
3102 AvARRAY (av)[0] = AvARRAY (av)[1];
3103 AvARRAY (av)[1] = cb;
3104
3105 cb = av_shift (av);
3106
3107 if (SvTYPE (cb) == SVt_PVCV)
3108 {
3109 dSP;
3110 PUSHMARK (SP);
3111 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3112 PUTBACK;
3113 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3114 }
3115 else
3116 {
3117 api_ready (aTHX_ cb);
3118 sv_setiv (cb, 0); /* signal waiter */
3119 }
3120
3121 SvREFCNT_dec (cb);
3122
3123 --count;
3124 }
3125}
3126
3127static int
3128slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3129{
3130 /* if we are about to throw, also stop waiting */
3131 return SvROK ((SV *)frame->data) && !CORO_THROW;
3132}
3133
3134static void
3135slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3136{
3137 AV *av = (AV *)SvRV (arg [0]);
3138
3139 if (items >= 2)
3140 {
3141 SV *cb_cv = s_get_cv_croak (arg [1]);
3142 av_push (av, SvREFCNT_inc_NN (cb_cv));
3143
3144 if (SvIVX (AvARRAY (av)[0]))
3145 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3146
3147 frame->prepare = prepare_nop;
3148 frame->check = slf_check_nop;
3149 }
3150 else if (SvIVX (AvARRAY (av)[0]))
3151 {
3152 SvIVX (AvARRAY (av)[0]) = 0;
3153 frame->prepare = prepare_nop;
3154 frame->check = slf_check_nop;
3155 }
3156 else
3157 {
3158 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3159
3160 av_push (av, waiter);
3161
3162 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3163 frame->prepare = prepare_schedule;
3164 frame->check = slf_check_signal_wait;
3165 }
3166}
3167
3168/*****************************************************************************/
3169/* Coro::AIO */
3170
3171#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3172
3173/* helper storage struct */
3174struct io_state
3175{
3176 int errorno;
3177 I32 laststype; /* U16 in 5.10.0 */
3178 int laststatval;
3179 Stat_t statcache;
3180};
3181
3182static void
3183coro_aio_callback (pTHX_ CV *cv)
3184{
3185 dXSARGS;
3186 AV *state = (AV *)S_GENSUB_ARG;
3187 SV *coro = av_pop (state);
3188 SV *data_sv = newSV (sizeof (struct io_state));
3189
3190 av_extend (state, items - 1);
3191
3192 sv_upgrade (data_sv, SVt_PV);
3193 SvCUR_set (data_sv, sizeof (struct io_state));
3194 SvPOK_only (data_sv);
3195
3196 {
3197 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3198
3199 data->errorno = errno;
3200 data->laststype = PL_laststype;
3201 data->laststatval = PL_laststatval;
3202 data->statcache = PL_statcache;
3203 }
3204
3205 /* now build the result vector out of all the parameters and the data_sv */
3206 {
3207 int i;
3208
3209 for (i = 0; i < items; ++i)
3210 av_push (state, SvREFCNT_inc_NN (ST (i)));
3211 }
3212
3213 av_push (state, data_sv);
3214
3215 api_ready (aTHX_ coro);
3216 SvREFCNT_dec (coro);
3217 SvREFCNT_dec ((AV *)state);
3218}
3219
3220static int
3221slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3222{
3223 AV *state = (AV *)frame->data;
3224
3225 /* if we are about to throw, return early */
3226 /* this does not cancel the aio request, but at least */
3227 /* it quickly returns */
3228 if (CORO_THROW)
3229 return 0;
3230
3231 /* one element that is an RV? repeat! */
3232 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3233 return 1;
3234
3235 /* restore status */
3236 {
3237 SV *data_sv = av_pop (state);
3238 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3239
3240 errno = data->errorno;
3241 PL_laststype = data->laststype;
3242 PL_laststatval = data->laststatval;
3243 PL_statcache = data->statcache;
3244
3245 SvREFCNT_dec (data_sv);
3246 }
3247
3248 /* push result values */
3249 {
3250 dSP;
3251 int i;
3252
3253 EXTEND (SP, AvFILLp (state) + 1);
3254 for (i = 0; i <= AvFILLp (state); ++i)
3255 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3256
3257 PUTBACK;
3258 }
3259
3260 return 0;
3261}
3262
3263static void
3264slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3265{
3266 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3267 SV *coro_hv = SvRV (coro_current);
3268 struct coro *coro = SvSTATE_hv (coro_hv);
3269
3270 /* put our coroutine id on the state arg */
3271 av_push (state, SvREFCNT_inc_NN (coro_hv));
3272
3273 /* first see whether we have a non-zero priority and set it as AIO prio */
3274 if (coro->prio)
3275 {
3276 dSP;
3277
3278 static SV *prio_cv;
3279 static SV *prio_sv;
3280
3281 if (ecb_expect_false (!prio_cv))
3282 {
3283 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3284 prio_sv = newSViv (0);
3285 }
3286
3287 PUSHMARK (SP);
3288 sv_setiv (prio_sv, coro->prio);
3289 XPUSHs (prio_sv);
3290
3291 PUTBACK;
3292 call_sv (prio_cv, G_VOID | G_DISCARD);
3293 }
3294
3295 /* now call the original request */
3296 {
3297 dSP;
3298 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3299 int i;
3300
3301 PUSHMARK (SP);
3302
3303 /* first push all args to the stack */
3304 EXTEND (SP, items + 1);
3305
3306 for (i = 0; i < items; ++i)
3307 PUSHs (arg [i]);
3308
3309 /* now push the callback closure */
3310 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3311
3312 /* now call the AIO function - we assume our request is uncancelable */
3313 PUTBACK;
3314 call_sv ((SV *)req, G_VOID | G_DISCARD);
3315 }
3316
3317 /* now that the request is going, we loop till we have a result */
3318 frame->data = (void *)state;
3319 frame->prepare = prepare_schedule;
3320 frame->check = slf_check_aio_req;
3321}
3322
3323static void
3324coro_aio_req_xs (pTHX_ CV *cv)
3325{
3326 dXSARGS;
3327
3328 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3329
3330 XSRETURN_EMPTY;
3331}
3332
3333/*****************************************************************************/
3334
3335#if CORO_CLONE
3336# include "clone.c"
3337#endif
3338
3339/*****************************************************************************/
3340
3341static SV *
3342coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3343{
3344 SV *coro_sv;
3345 struct coro *coro;
3346 MAGIC *mg;
3347 HV *hv;
3348 SV *cb;
3349 int i;
3350
3351 if (argc > 0)
3352 {
3353 cb = s_get_cv_croak (argv [0]);
3354
3355 if (!is_coro)
3356 {
3357 if (CvISXSUB (cb))
3358 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3359
3360 if (!CvROOT (cb))
3361 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3362 }
3363 }
3364
3365 Newz (0, coro, 1, struct coro);
3366 coro->args = newAV ();
3367 coro->flags = CF_NEW;
3368
3369 if (coro_first) coro_first->prev = coro;
3370 coro->next = coro_first;
3371 coro_first = coro;
3372
3373 coro->hv = hv = newHV ();
3374 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3375 mg->mg_flags |= MGf_DUP;
3376 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3377
3378 if (argc > 0)
3379 {
3380 av_extend (coro->args, argc + is_coro - 1);
3381
3382 if (is_coro)
3383 {
3384 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3385 cb = (SV *)cv_coro_run;
3386 }
3387
3388 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3389
3390 for (i = 1; i < argc; i++)
3391 av_push (coro->args, newSVsv (argv [i]));
3392 }
3393
3394 return coro_sv;
3395}
3396
3397#ifndef __cplusplus
3398ecb_cold XS(boot_Coro__State);
3399#endif
3400
3401#if CORO_JIT
3402
3403static void ecb_noinline ecb_cold
3404pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3405{
3406 dSP;
3407 AV *av = newAV ();
3408
3409 av_store (av, 3, newSVuv (d));
3410 av_store (av, 2, newSVuv (c));
3411 av_store (av, 1, newSVuv (b));
3412 av_store (av, 0, newSVuv (a));
3413
3414 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3415
3416 PUTBACK;
3417}
3418
3419static void ecb_noinline ecb_cold
3420jit_init (pTHX)
3421{
3422 dSP;
3423 SV *load, *save;
3424 char *map_base;
3425 char *load_ptr, *save_ptr;
3426 STRLEN load_len, save_len, map_len;
3427 int count;
3428
3429 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3430
3431 PUSHMARK (SP);
3432 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3433 #include "state.h"
3434 count = call_pv ("Coro::State::_jit", G_ARRAY);
3435 SPAGAIN;
3436
3437 save = POPs; save_ptr = SvPVbyte (save, save_len);
3438 load = POPs; load_ptr = SvPVbyte (load, load_len);
3439
3440 map_len = load_len + save_len + 16;
3441
3442 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3443
3444 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3445
3446 load_perl_slots = (load_save_perl_slots_type)map_base;
3447 memcpy (map_base, load_ptr, load_len);
3448
3449 map_base += (load_len + 15) & ~15;
3450
3451 save_perl_slots = (load_save_perl_slots_type)map_base;
3452 memcpy (map_base, save_ptr, save_len);
3453
3454 /* we are good citizens and try to make the page read-only, so the evil evil */
3455 /* hackers might have it a bit more difficult */
3456 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3457
3458 PUTBACK;
3459 eval_pv ("undef &Coro::State::_jit", 1);
3460}
3461
3462#endif
3463
990MODULE = Coro::State PACKAGE = Coro::State 3464MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
991 3465
992PROTOTYPES: DISABLE 3466PROTOTYPES: DISABLE
993 3467
994BOOT: 3468BOOT:
995{ 3469{
996#ifdef USE_ITHREADS 3470#ifdef USE_ITHREADS
997 MUTEX_INIT (&coro_mutex); 3471# if CORO_PTHREAD
3472 coro_thx = PERL_GET_CONTEXT;
3473# endif
998#endif 3474#endif
999 BOOT_PAGESIZE; 3475 BOOT_PAGESIZE;
1000 3476
3477 /* perl defines these to check for existance first, but why it doesn't */
3478 /* just create them one at init time is not clear to me, except for */
3479 /* programs trying to delete them, but... */
3480 /* anyway, we declare this as invalid and make sure they are initialised here */
3481 DEFSV;
3482 ERRSV;
3483
3484 cctx_current = cctx_new_empty ();
3485
3486 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3487 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3488
3489 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3490 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3491 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3492
3493 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3494 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3495 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3496
1001 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3497 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1002 3498
1003 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3499 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1004 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3500 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1005 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3501 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
3502 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1006 3503
1007 main_mainstack = PL_mainstack; 3504 main_mainstack = PL_mainstack;
3505 main_top_env = PL_top_env;
1008 3506
3507 while (main_top_env->je_prev)
3508 main_top_env = main_top_env->je_prev;
3509
3510 {
3511 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3512
3513 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3514 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3515
3516 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3517 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3518 }
3519
1009 coroapi.ver = CORO_API_VERSION; 3520 coroapi.ver = CORO_API_VERSION;
3521 coroapi.rev = CORO_API_REVISION;
3522
1010 coroapi.transfer = api_transfer; 3523 coroapi.transfer = api_transfer;
1011 3524
3525 coroapi.sv_state = SvSTATE_;
3526 coroapi.execute_slf = api_execute_slf;
3527 coroapi.prepare_nop = prepare_nop;
3528 coroapi.prepare_schedule = prepare_schedule;
3529 coroapi.prepare_cede = prepare_cede;
3530 coroapi.prepare_cede_notself = prepare_cede_notself;
3531
3532 time_init (aTHX);
3533
1012 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3534 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3535#if CORO_JIT
3536 PUTBACK;
3537 jit_init (aTHX);
3538 SPAGAIN;
3539#endif
1013} 3540}
1014 3541
1015SV * 3542SV *
1016new (char *klass, ...) 3543new (SV *klass, ...)
3544 ALIAS:
3545 Coro::new = 1
1017 CODE: 3546 CODE:
1018{ 3547 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1019 struct coro *coro; 3548 OUTPUT:
1020 HV *hv;
1021 int i;
1022
1023 Newz (0, coro, 1, struct coro);
1024 coro->args = newAV ();
1025
1026 hv = newHV ();
1027 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1028 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1029
1030 for (i = 1; i < items; i++)
1031 av_push (coro->args, newSVsv (ST (i)));
1032
1033 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1034 /*coro->stack = 0;*/
1035}
1036 OUTPUT:
1037 RETVAL 3549 RETVAL
1038 3550
1039void 3551void
1040_set_stacklevel (...) 3552transfer (...)
1041 ALIAS: 3553 PROTOTYPE: $$
1042 Coro::State::transfer = 1 3554 CODE:
1043 Coro::schedule = 2 3555 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1044 Coro::cede = 3
1045 Coro::Cont::yield = 4
1046 CODE:
1047{
1048 struct transfer_args ta;
1049
1050 switch (ix)
1051 {
1052 case 0:
1053 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));
1054 ta.next = 0;
1055 ta.flags = TRANSFER_SET_STACKLEVEL;
1056 break;
1057
1058 case 1:
1059 if (items != 3)
1060 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1061
1062 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1063 break;
1064
1065 case 2:
1066 prepare_schedule (&ta);
1067 break;
1068
1069 case 3:
1070 prepare_cede (&ta);
1071 break;
1072
1073 case 4:
1074 {
1075 SV *yieldstack;
1076 SV *sv;
1077 AV *defav = GvAV (PL_defgv);
1078
1079 yieldstack = *hv_fetch (
1080 (HV *)SvRV (GvSV (coro_current)),
1081 "yieldstack", sizeof ("yieldstack") - 1,
1082 0
1083 );
1084
1085 /* set up @_ -- ugly */
1086 av_clear (defav);
1087 av_fill (defav, items - 1);
1088 while (items--)
1089 av_store (defav, items, SvREFCNT_inc (ST(items)));
1090
1091 sv = av_pop ((AV *)SvRV (yieldstack));
1092 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1093 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1094 ta.flags = 0;
1095 SvREFCNT_dec (sv);
1096 }
1097 break;
1098
1099 }
1100
1101 TRANSFER (ta);
1102}
1103 3556
1104void 3557void
1105_clone_state_from (SV *dst, SV *src)
1106 CODE:
1107{
1108 struct coro *coro_src = SvSTATE (src);
1109
1110 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1111
1112 ++coro_src->refcnt;
1113 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1114}
1115
1116void
1117_nonlocal_goto (IV nextop)
1118 CODE:
1119 /* uuh, somebody will kill me again for this */
1120 PL_op->op_next = INT2PTR (OP *, nextop);
1121
1122void
1123_exit (code) 3558_exit (int code)
1124 int code
1125 PROTOTYPE: $ 3559 PROTOTYPE: $
1126 CODE: 3560 CODE:
1127 _exit (code); 3561 _exit (code);
1128 3562
3563SV *
3564clone (Coro::State coro)
3565 CODE:
3566{
3567#if CORO_CLONE
3568 struct coro *ncoro = coro_clone (aTHX_ coro);
3569 MAGIC *mg;
3570 /* TODO: too much duplication */
3571 ncoro->hv = newHV ();
3572 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3573 mg->mg_flags |= MGf_DUP;
3574 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3575#else
3576 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3577#endif
3578}
3579 OUTPUT:
3580 RETVAL
3581
3582int
3583cctx_stacksize (int new_stacksize = 0)
3584 PROTOTYPE: ;$
3585 CODE:
3586 RETVAL = cctx_stacksize;
3587 if (new_stacksize)
3588 {
3589 cctx_stacksize = new_stacksize;
3590 ++cctx_gen;
3591 }
3592 OUTPUT:
3593 RETVAL
3594
3595int
3596cctx_max_idle (int max_idle = 0)
3597 PROTOTYPE: ;$
3598 CODE:
3599 RETVAL = cctx_max_idle;
3600 if (max_idle > 1)
3601 cctx_max_idle = max_idle;
3602 OUTPUT:
3603 RETVAL
3604
3605int
3606cctx_count ()
3607 PROTOTYPE:
3608 CODE:
3609 RETVAL = cctx_count;
3610 OUTPUT:
3611 RETVAL
3612
3613int
3614cctx_idle ()
3615 PROTOTYPE:
3616 CODE:
3617 RETVAL = cctx_idle;
3618 OUTPUT:
3619 RETVAL
3620
3621void
3622list ()
3623 PROTOTYPE:
3624 PPCODE:
3625{
3626 struct coro *coro;
3627 for (coro = coro_first; coro; coro = coro->next)
3628 if (coro->hv)
3629 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3630}
3631
3632void
3633call (Coro::State coro, SV *coderef)
3634 ALIAS:
3635 eval = 1
3636 CODE:
3637{
3638 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3639 {
3640 struct coro *current = SvSTATE_current;
3641 struct CoroSLF slf_save;
3642
3643 if (current != coro)
3644 {
3645 PUTBACK;
3646 save_perl (aTHX_ current);
3647 load_perl (aTHX_ coro);
3648 /* the coro is most likely in an active SLF call.
3649 * while not strictly required (the code we execute is
3650 * not allowed to call any SLF functions), it's cleaner
3651 * to reinitialise the slf_frame and restore it later.
3652 * This might one day allow us to actually do SLF calls
3653 * from code executed here.
3654 */
3655 slf_save = slf_frame;
3656 slf_frame.prepare = 0;
3657 SPAGAIN;
3658 }
3659
3660 PUSHSTACK;
3661
3662 PUSHMARK (SP);
3663 PUTBACK;
3664
3665 if (ix)
3666 eval_sv (coderef, 0);
3667 else
3668 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3669
3670 POPSTACK;
3671 SPAGAIN;
3672
3673 if (current != coro)
3674 {
3675 PUTBACK;
3676 slf_frame = slf_save;
3677 save_perl (aTHX_ coro);
3678 load_perl (aTHX_ current);
3679 SPAGAIN;
3680 }
3681 }
3682}
3683
3684SV *
3685is_ready (Coro::State coro)
3686 PROTOTYPE: $
3687 ALIAS:
3688 is_ready = CF_READY
3689 is_running = CF_RUNNING
3690 is_new = CF_NEW
3691 is_destroyed = CF_ZOMBIE
3692 is_zombie = CF_ZOMBIE
3693 is_suspended = CF_SUSPENDED
3694 CODE:
3695 RETVAL = boolSV (coro->flags & ix);
3696 OUTPUT:
3697 RETVAL
3698
3699void
3700throw (SV *self, SV *exception = &PL_sv_undef)
3701 PROTOTYPE: $;$
3702 CODE:
3703{
3704 struct coro *coro = SvSTATE (self);
3705 struct coro *current = SvSTATE_current;
3706 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3707 SvREFCNT_dec (*exceptionp);
3708 SvGETMAGIC (exception);
3709 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3710
3711 api_ready (aTHX_ self);
3712}
3713
3714void
3715api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3716 PROTOTYPE: $;$
3717 C_ARGS: aTHX_ coro, flags
3718
3719SV *
3720has_cctx (Coro::State coro)
3721 PROTOTYPE: $
3722 CODE:
3723 /* maybe manage the running flag differently */
3724 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3725 OUTPUT:
3726 RETVAL
3727
3728int
3729is_traced (Coro::State coro)
3730 PROTOTYPE: $
3731 CODE:
3732 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3733 OUTPUT:
3734 RETVAL
3735
3736UV
3737rss (Coro::State coro)
3738 PROTOTYPE: $
3739 ALIAS:
3740 usecount = 1
3741 CODE:
3742 switch (ix)
3743 {
3744 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3745 case 1: RETVAL = coro->usecount; break;
3746 }
3747 OUTPUT:
3748 RETVAL
3749
3750void
3751force_cctx ()
3752 PROTOTYPE:
3753 CODE:
3754 cctx_current->idle_sp = 0;
3755
3756void
3757swap_defsv (Coro::State self)
3758 PROTOTYPE: $
3759 ALIAS:
3760 swap_defav = 1
3761 CODE:
3762 if (!self->slot)
3763 croak ("cannot swap state with coroutine that has no saved state,");
3764 else
3765 {
3766 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3767 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3768
3769 SV *tmp = *src; *src = *dst; *dst = tmp;
3770 }
3771
3772void
3773cancel (Coro::State self)
3774 CODE:
3775 coro_state_destroy (aTHX_ self);
3776
3777SV *
3778enable_times (int enabled = enable_times)
3779 CODE:
3780{
3781 RETVAL = boolSV (enable_times);
3782
3783 if (enabled != enable_times)
3784 {
3785 enable_times = enabled;
3786
3787 coro_times_update ();
3788 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3789 }
3790}
3791 OUTPUT:
3792 RETVAL
3793
3794void
3795times (Coro::State self)
3796 PPCODE:
3797{
3798 struct coro *current = SvSTATE (coro_current);
3799
3800 if (ecb_expect_false (current == self))
3801 {
3802 coro_times_update ();
3803 coro_times_add (SvSTATE (coro_current));
3804 }
3805
3806 EXTEND (SP, 2);
3807 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3808 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3809
3810 if (ecb_expect_false (current == self))
3811 coro_times_sub (SvSTATE (coro_current));
3812}
3813
3814void
3815swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3816 CODE:
3817{
3818 struct coro *current = SvSTATE_current;
3819
3820 if (current == coro)
3821 SWAP_SVS (current);
3822
3823 if (!coro->swap_sv)
3824 coro->swap_sv = newAV ();
3825
3826 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3827 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3828
3829 if (current == coro)
3830 SWAP_SVS (current);
3831}
3832
3833
1129MODULE = Coro::State PACKAGE = Coro 3834MODULE = Coro::State PACKAGE = Coro
1130 3835
1131BOOT: 3836BOOT:
1132{ 3837{
1133 int i; 3838 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3839 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3840 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3841 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3842 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3843 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3844 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3845 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1134 3846
3847 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3848 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3849 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3850 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3851
1135 coro_stash = gv_stashpv ("Coro", TRUE); 3852 coro_stash = gv_stashpv ("Coro", TRUE);
1136 3853
1137 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3854 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1138 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3855 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1139 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3856 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1140 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3857 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1141 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3858 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1142 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3859 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1143
1144 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1145 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1146
1147 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1148 coro_ready[i] = newAV ();
1149 3860
1150 { 3861 {
1151 SV *sv = perl_get_sv("Coro::API", 1); 3862 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1152 3863
1153 coroapi.schedule = api_schedule; 3864 coroapi.schedule = api_schedule;
3865 coroapi.schedule_to = api_schedule_to;
1154 coroapi.cede = api_cede; 3866 coroapi.cede = api_cede;
3867 coroapi.cede_notself = api_cede_notself;
1155 coroapi.ready = api_ready; 3868 coroapi.ready = api_ready;
3869 coroapi.is_ready = api_is_ready;
1156 coroapi.nready = &coro_nready; 3870 coroapi.nready = coro_nready;
1157 coroapi.current = coro_current; 3871 coroapi.current = coro_current;
1158 3872
1159 GCoroAPI = &coroapi; 3873 /*GCoroAPI = &coroapi;*/
1160 sv_setiv (sv, (IV)&coroapi); 3874 sv_setiv (sv, (IV)&coroapi);
1161 SvREADONLY_on (sv); 3875 SvREADONLY_on (sv);
1162 } 3876 }
1163} 3877}
1164 3878
3879SV *
3880async (...)
3881 PROTOTYPE: &@
3882 CODE:
3883 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3884 api_ready (aTHX_ RETVAL);
3885 OUTPUT:
3886 RETVAL
3887
3888void
3889_destroy (Coro::State coro)
3890 CODE:
3891 /* used by the manager thread */
3892 coro_state_destroy (aTHX_ coro);
3893
3894void
3895on_destroy (Coro::State coro, SV *cb)
3896 CODE:
3897 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3898
3899void
3900join (...)
3901 CODE:
3902 CORO_EXECUTE_SLF_XS (slf_init_join);
3903
3904void
3905terminate (...)
3906 CODE:
3907 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3908
3909void
3910cancel (...)
3911 CODE:
3912 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3913
3914int
3915safe_cancel (Coro::State self, ...)
3916 C_ARGS: aTHX_ self, &ST (1), items - 1
3917
3918void
3919schedule (...)
3920 CODE:
3921 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3922
3923void
3924schedule_to (...)
3925 CODE:
3926 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3927
3928void
3929cede_to (...)
3930 CODE:
3931 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3932
3933void
3934cede (...)
3935 CODE:
3936 CORO_EXECUTE_SLF_XS (slf_init_cede);
3937
3938void
3939cede_notself (...)
3940 CODE:
3941 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3942
3943void
3944_set_current (SV *current)
3945 PROTOTYPE: $
3946 CODE:
3947 SvREFCNT_dec (SvRV (coro_current));
3948 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3949
3950void
3951_set_readyhook (SV *hook)
3952 PROTOTYPE: $
3953 CODE:
3954 SvREFCNT_dec (coro_readyhook);
3955 SvGETMAGIC (hook);
3956 if (SvOK (hook))
3957 {
3958 coro_readyhook = newSVsv (hook);
3959 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3960 }
3961 else
3962 {
3963 coro_readyhook = 0;
3964 CORO_READYHOOK = 0;
3965 }
3966
1165int 3967int
1166prio (Coro::State coro, int newprio = 0) 3968prio (Coro::State coro, int newprio = 0)
3969 PROTOTYPE: $;$
1167 ALIAS: 3970 ALIAS:
1168 nice = 1 3971 nice = 1
1169 CODE: 3972 CODE:
1170{ 3973{
1171 RETVAL = coro->prio; 3974 RETVAL = coro->prio;
1172 3975
1173 if (items > 1) 3976 if (items > 1)
1174 { 3977 {
1175 if (ix) 3978 if (ix)
1176 newprio += coro->prio; 3979 newprio = coro->prio - newprio;
1177 3980
1178 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3981 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1179 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3982 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1180 3983
1181 coro->prio = newprio; 3984 coro->prio = newprio;
1182 } 3985 }
1183} 3986}
3987 OUTPUT:
3988 RETVAL
1184 3989
1185void 3990SV *
1186ready (SV *self) 3991ready (SV *self)
1187 PROTOTYPE: $ 3992 PROTOTYPE: $
1188 CODE: 3993 CODE:
1189 api_ready (self); 3994 RETVAL = boolSV (api_ready (aTHX_ self));
3995 OUTPUT:
3996 RETVAL
1190 3997
1191int 3998int
1192nready (...) 3999nready (...)
1193 PROTOTYPE: 4000 PROTOTYPE:
1194 CODE: 4001 CODE:
1195 RETVAL = coro_nready; 4002 RETVAL = coro_nready;
1196 OUTPUT: 4003 OUTPUT:
1197 RETVAL 4004 RETVAL
1198 4005
1199MODULE = Coro::State PACKAGE = Coro::AIO 4006void
4007suspend (Coro::State self)
4008 PROTOTYPE: $
4009 CODE:
4010 self->flags |= CF_SUSPENDED;
4011
4012void
4013resume (Coro::State self)
4014 PROTOTYPE: $
4015 CODE:
4016 self->flags &= ~CF_SUSPENDED;
4017
4018void
4019_pool_handler (...)
4020 CODE:
4021 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
4022
4023void
4024async_pool (SV *cv, ...)
4025 PROTOTYPE: &@
4026 PPCODE:
4027{
4028 HV *hv = (HV *)av_pop (av_async_pool);
4029 AV *av = newAV ();
4030 SV *cb = ST (0);
4031 int i;
4032
4033 av_extend (av, items - 2);
4034 for (i = 1; i < items; ++i)
4035 av_push (av, SvREFCNT_inc_NN (ST (i)));
4036
4037 if ((SV *)hv == &PL_sv_undef)
4038 {
4039 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
4040 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
4041 SvREFCNT_dec (sv);
4042 }
4043
4044 {
4045 struct coro *coro = SvSTATE_hv (hv);
4046
4047 assert (!coro->invoke_cb);
4048 assert (!coro->invoke_av);
4049 coro->invoke_cb = SvREFCNT_inc (cb);
4050 coro->invoke_av = av;
4051 }
4052
4053 api_ready (aTHX_ (SV *)hv);
4054
4055 if (GIMME_V != G_VOID)
4056 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4057 else
4058 SvREFCNT_dec (hv);
4059}
1200 4060
1201SV * 4061SV *
1202_get_state () 4062rouse_cb ()
4063 PROTOTYPE:
1203 CODE: 4064 CODE:
1204{ 4065 RETVAL = coro_new_rouse_cb (aTHX);
1205 struct {
1206 int errorno;
1207 int laststype;
1208 int laststatval;
1209 Stat_t statcache;
1210 } data;
1211
1212 data.errorno = errno;
1213 data.laststype = PL_laststype;
1214 data.laststatval = PL_laststatval;
1215 data.statcache = PL_statcache;
1216
1217 RETVAL = newSVpvn ((char *)&data, sizeof data);
1218}
1219 OUTPUT: 4066 OUTPUT:
1220 RETVAL 4067 RETVAL
1221 4068
1222void 4069void
1223_set_state (char *data_) 4070rouse_wait (...)
4071 PROTOTYPE: ;$
4072 PPCODE:
4073 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4074
4075void
4076on_enter (SV *block)
4077 ALIAS:
4078 on_leave = 1
1224 PROTOTYPE: $ 4079 PROTOTYPE: &
1225 CODE: 4080 CODE:
1226{ 4081{
1227 struct { 4082 struct coro *coro = SvSTATE_current;
4083 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
4084
4085 block = s_get_cv_croak (block);
4086
4087 if (!*avp)
4088 *avp = newAV ();
4089
4090 av_push (*avp, SvREFCNT_inc (block));
4091
4092 if (!ix)
4093 on_enterleave_call (aTHX_ block);
4094
4095 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4096 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4097 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4098}
4099
4100
4101MODULE = Coro::State PACKAGE = PerlIO::cede
4102
4103BOOT:
4104 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4105
4106
4107MODULE = Coro::State PACKAGE = Coro::Semaphore
4108
4109SV *
4110new (SV *klass, SV *count = 0)
4111 CODE:
4112{
4113 int semcnt = 1;
4114
4115 if (count)
4116 {
4117 SvGETMAGIC (count);
4118
4119 if (SvOK (count))
4120 semcnt = SvIV (count);
4121 }
4122
4123 RETVAL = sv_bless (
4124 coro_waitarray_new (aTHX_ semcnt),
4125 GvSTASH (CvGV (cv))
4126 );
4127}
4128 OUTPUT:
4129 RETVAL
4130
4131# helper for Coro::Channel and others
4132SV *
4133_alloc (int count)
4134 CODE:
4135 RETVAL = coro_waitarray_new (aTHX_ count);
4136 OUTPUT:
4137 RETVAL
4138
4139SV *
4140count (SV *self)
4141 CODE:
4142 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4143 OUTPUT:
4144 RETVAL
4145
4146void
4147up (SV *self, int adjust = 1)
4148 ALIAS:
4149 adjust = 1
4150 CODE:
4151 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4152
4153void
4154down (...)
4155 CODE:
4156 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4157
4158void
4159wait (...)
4160 CODE:
4161 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4162
4163void
4164try (SV *self)
4165 PPCODE:
4166{
4167 AV *av = (AV *)SvRV (self);
4168 SV *count_sv = AvARRAY (av)[0];
4169 IV count = SvIVX (count_sv);
4170
4171 if (count > 0)
4172 {
4173 --count;
4174 SvIVX (count_sv) = count;
4175 XSRETURN_YES;
4176 }
4177 else
4178 XSRETURN_NO;
4179}
4180
4181void
4182waiters (SV *self)
4183 PPCODE:
4184{
4185 AV *av = (AV *)SvRV (self);
4186 int wcount = AvFILLp (av) + 1 - 1;
4187
4188 if (GIMME_V == G_SCALAR)
4189 XPUSHs (sv_2mortal (newSViv (wcount)));
4190 else
4191 {
1228 int errorno; 4192 int i;
1229 int laststype; 4193 EXTEND (SP, wcount);
1230 int laststatval; 4194 for (i = 1; i <= wcount; ++i)
1231 Stat_t statcache; 4195 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1232 } *data = (void *)data_; 4196 }
1233
1234 errno = data->errorno;
1235 PL_laststype = data->laststype;
1236 PL_laststatval = data->laststatval;
1237 PL_statcache = data->statcache;
1238} 4197}
4198
4199MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4200
4201void
4202_may_delete (SV *sem, int count, unsigned int extra_refs)
4203 PPCODE:
4204{
4205 AV *av = (AV *)SvRV (sem);
4206
4207 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4208 && AvFILLp (av) == 0 /* no waiters, just count */
4209 && SvIV (AvARRAY (av)[0]) == count)
4210 XSRETURN_YES;
4211
4212 XSRETURN_NO;
4213}
4214
4215MODULE = Coro::State PACKAGE = Coro::Signal
4216
4217SV *
4218new (SV *klass)
4219 CODE:
4220 RETVAL = sv_bless (
4221 coro_waitarray_new (aTHX_ 0),
4222 GvSTASH (CvGV (cv))
4223 );
4224 OUTPUT:
4225 RETVAL
4226
4227void
4228wait (...)
4229 CODE:
4230 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4231
4232void
4233broadcast (SV *self)
4234 CODE:
4235{
4236 AV *av = (AV *)SvRV (self);
4237 coro_signal_wake (aTHX_ av, AvFILLp (av));
4238}
4239
4240void
4241send (SV *self)
4242 CODE:
4243{
4244 AV *av = (AV *)SvRV (self);
4245
4246 if (AvFILLp (av))
4247 coro_signal_wake (aTHX_ av, 1);
4248 else
4249 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4250}
4251
4252IV
4253awaited (SV *self)
4254 CODE:
4255 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4256 OUTPUT:
4257 RETVAL
4258
4259
4260MODULE = Coro::State PACKAGE = Coro::AnyEvent
4261
4262BOOT:
4263 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4264
4265void
4266_schedule (...)
4267 CODE:
4268{
4269 static int incede;
4270
4271 api_cede_notself (aTHX);
4272
4273 ++incede;
4274 while (coro_nready >= incede && api_cede (aTHX))
4275 ;
4276
4277 sv_setsv (sv_activity, &PL_sv_undef);
4278 if (coro_nready >= incede)
4279 {
4280 PUSHMARK (SP);
4281 PUTBACK;
4282 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4283 }
4284
4285 --incede;
4286}
4287
4288
4289MODULE = Coro::State PACKAGE = Coro::AIO
4290
4291void
4292_register (char *target, char *proto, SV *req)
4293 CODE:
4294{
4295 SV *req_cv = s_get_cv_croak (req);
4296 /* newXSproto doesn't return the CV on 5.8 */
4297 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4298 sv_setpv ((SV *)slf_cv, proto);
4299 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4300}
4301
4302MODULE = Coro::State PACKAGE = Coro::Select
4303
4304void
4305patch_pp_sselect ()
4306 CODE:
4307 if (!coro_old_pp_sselect)
4308 {
4309 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4310 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4311 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4312 }
4313
4314void
4315unpatch_pp_sselect ()
4316 CODE:
4317 if (coro_old_pp_sselect)
4318 {
4319 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4320 coro_old_pp_sselect = 0;
4321 }
4322

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines