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Comparing Coro/Coro/State.xs (file contents):
Revision 1.94 by root, Sun Nov 26 17:14:15 2006 UTC vs.
Revision 1.424 by root, Fri Nov 30 19:27:28 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
6#include "libcoro/coro.c"
7
1#define PERL_NO_GET_CONTEXT 8#define PERL_NO_GET_CONTEXT
2 9#define PERL_EXT
3#include "libcoro/coro.c"
4 10
5#include "EXTERN.h" 11#include "EXTERN.h"
6#include "perl.h" 12#include "perl.h"
7#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
8 15
9#include "patchlevel.h" 16#include "schmorp.h"
10 17
11#if PERL_VERSION < 6 18#define ECB_NO_THREADS 1
12# ifndef PL_ppaddr 19#include "ecb.h"
13# define PL_ppaddr ppaddr
14# endif
15# ifndef call_sv
16# define call_sv perl_call_sv
17# endif
18# ifndef get_sv
19# define get_sv perl_get_sv
20# endif
21# ifndef get_cv
22# define get_cv perl_get_cv
23# endif
24# ifndef IS_PADGV
25# define IS_PADGV(v) 0
26# endif
27# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0
29# endif
30#endif
31 20
21#include <stddef.h>
32#include <stdio.h> 22#include <stdio.h>
33#include <errno.h> 23#include <errno.h>
24#include <assert.h>
34 25
35#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 26#ifndef SVs_PADSTALE
36# undef STACKGUARD 27# define SVs_PADSTALE 0
37#endif 28#endif
38 29
39#ifndef STACKGUARD 30#if defined(_WIN32)
40# define STACKGUARD 0 31# undef HAS_GETTIMEOFDAY
32# undef setjmp
33# undef longjmp
34# undef _exit
35# define setjmp _setjmp /* deep magic */
36#else
37# include <inttypes.h> /* most portable stdint.h */
41#endif 38#endif
42 39
43#ifdef HAVE_MMAP 40#if HAVE_MMAP
44# include <unistd.h> 41# include <unistd.h>
45# include <sys/mman.h> 42# include <sys/mman.h>
46# ifndef MAP_ANONYMOUS 43# ifndef MAP_ANONYMOUS
47# ifdef MAP_ANON 44# ifdef MAP_ANON
48# define MAP_ANONYMOUS MAP_ANON 45# define MAP_ANONYMOUS MAP_ANON
… …
54# ifndef PAGESIZE 51# ifndef PAGESIZE
55# define PAGESIZE pagesize 52# define PAGESIZE pagesize
56# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 53# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57static long pagesize; 54static long pagesize;
58# else 55# else
59# define BOOT_PAGESIZE 56# define BOOT_PAGESIZE (void)0
60# endif 57# endif
58#else
59# define PAGESIZE 0
60# define BOOT_PAGESIZE (void)0
61#endif 61#endif
62 62
63/* The next macro should declare a variable stacklevel that contains and approximation 63#if CORO_USE_VALGRIND
64 * to the current C stack pointer. Its property is that it changes with each call 64# include <valgrind/valgrind.h>
65 * and should be unique. */ 65#endif
66
67/* the maximum number of idle cctx that will be pooled */
68static int cctx_max_idle = 4;
69
70#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
71# define HAS_SCOPESTACK_NAME 1
72#endif
73
74#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
75# undef CORO_STACKGUARD
76#endif
77
78#ifndef CORO_STACKGUARD
79# define CORO_STACKGUARD 0
80#endif
81
82/* prefer perl internal functions over our own? */
83#ifndef CORO_PREFER_PERL_FUNCTIONS
84# define CORO_PREFER_PERL_FUNCTIONS 0
85#endif
86
87/* The next macros try to return the current stack pointer, in an as
88 * portable way as possible. */
89#if __GNUC__ >= 4
66#define dSTACKLEVEL int stacklevel 90# define dSTACKLEVEL int stacklevel_dummy
91# define STACKLEVEL __builtin_frame_address (0)
92#else
93# define dSTACKLEVEL volatile void *stacklevel
67#define STACKLEVEL ((void *)&stacklevel) 94# define STACKLEVEL ((void *)&stacklevel)
95#endif
68 96
69#define IN_DESTRUCT (PL_main_cv == Nullcv) 97#define IN_DESTRUCT PL_dirty
70 98
71#include "CoroAPI.h" 99#include "CoroAPI.h"
72 100#define GCoroAPI (&coroapi) /* very sneaky */
73#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
74 101
75#ifdef USE_ITHREADS 102#ifdef USE_ITHREADS
76static perl_mutex coro_mutex; 103# if CORO_PTHREAD
77# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 104static void *coro_thx;
78# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
79#else
80# define LOCK (void)0
81# define UNLOCK (void)0
82#endif 105# endif
106#endif
83 107
108#ifdef __linux
109# include <time.h> /* for timespec */
110# include <syscall.h> /* for SYS_* */
111# ifdef SYS_clock_gettime
112# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
113# define CORO_CLOCK_MONOTONIC 1
114# define CORO_CLOCK_THREAD_CPUTIME_ID 3
115# endif
116#endif
117
118static double (*nvtime)(); /* so why doesn't it take void? */
119static void (*u2time)(pTHX_ UV ret[2]);
120
121/* we hijack an hopefully unused CV flag for our purposes */
122#define CVf_SLF 0x4000
123static OP *pp_slf (pTHX);
124static void slf_destroy (pTHX_ struct coro *coro);
125
126static U32 cctx_gen;
127static size_t cctx_stacksize = CORO_STACKSIZE;
84static struct CoroAPI coroapi; 128static struct CoroAPI coroapi;
85static AV *main_mainstack; /* used to differentiate between $main and others */ 129static AV *main_mainstack; /* used to differentiate between $main and others */
130static JMPENV *main_top_env;
86static HV *coro_state_stash, *coro_stash; 131static HV *coro_state_stash, *coro_stash;
87static SV *coro_mortal; /* will be freed after next transfer */ 132static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
133
134static AV *av_destroy; /* destruction queue */
135static SV *sv_manager; /* the manager coro */
136static SV *sv_idle; /* $Coro::idle */
137
138static GV *irsgv; /* $/ */
139static GV *stdoutgv; /* *STDOUT */
140static SV *rv_diehook;
141static SV *rv_warnhook;
142static HV *hv_sig; /* %SIG */
143
144/* async_pool helper stuff */
145static SV *sv_pool_rss;
146static SV *sv_pool_size;
147static SV *sv_async_pool_idle; /* description string */
148static AV *av_async_pool; /* idle pool */
149static SV *sv_Coro; /* class string */
150static CV *cv_pool_handler;
151
152/* Coro::AnyEvent */
153static SV *sv_activity;
154
155/* enable processtime/realtime profiling */
156static char enable_times;
157typedef U32 coro_ts[2];
158static coro_ts time_real, time_cpu;
159static char times_valid;
160
161static struct coro_cctx *cctx_first;
162static int cctx_count, cctx_idle;
163
164enum
165{
166 CC_MAPPED = 0x01,
167 CC_NOREUSE = 0x02, /* throw this away after tracing */
168 CC_TRACE = 0x04,
169 CC_TRACE_SUB = 0x08, /* trace sub calls */
170 CC_TRACE_LINE = 0x10, /* trace each statement */
171 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
172};
88 173
89/* this is a structure representing a c-level coroutine */ 174/* this is a structure representing a c-level coroutine */
90typedef struct coro_stack { 175typedef struct coro_cctx
176{
91 struct coro_stack *next; 177 struct coro_cctx *next;
92 178
93 /* the stack */ 179 /* the stack */
94 void *sptr; 180 void *sptr;
95 long ssize; /* positive == mmap, otherwise malloc */ 181 size_t ssize;
96 182
97 /* cpu state */ 183 /* cpu state */
98 void *idle_sp; /* original stacklevel when coroutine was created */ 184 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
185#ifndef NDEBUG
186 JMPENV *idle_te; /* same as idle_sp, but for top_env */
187#endif
99 JMPENV *top_env; 188 JMPENV *top_env;
100 coro_context cctx; 189 coro_context cctx;
101} coro_stack;
102 190
103/* the (fake) coro_stack representing the main program */ 191 U32 gen;
104static coro_stack *main_stack; 192#if CORO_USE_VALGRIND
193 int valgrind_id;
194#endif
195 unsigned char flags;
196} coro_cctx;
197
198static coro_cctx *cctx_current; /* the currently running cctx */
199
200/*****************************************************************************/
201
202static MGVTBL coro_state_vtbl;
203
204enum
205{
206 CF_RUNNING = 0x0001, /* coroutine is running */
207 CF_READY = 0x0002, /* coroutine is ready */
208 CF_NEW = 0x0004, /* has never been switched to */
209 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
210 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
211 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
212};
213
214/* the structure where most of the perl state is stored, overlaid on the cxstack */
215typedef struct
216{
217 #define VARx(name,expr,type) type name;
218 #include "state.h"
219} perl_slots;
220
221/* how many context stack entries do we need for perl_slots */
222#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
105 223
106/* this is a structure representing a perl-level coroutine */ 224/* this is a structure representing a perl-level coroutine */
107struct coro { 225struct coro
226{
108 /* the c coroutine allocated to this perl coroutine, if any */ 227 /* the C coroutine allocated to this perl coroutine, if any */
109 coro_stack *stack; 228 coro_cctx *cctx;
110 229
111 /* data associated with this coroutine (initial args) */ 230 /* ready queue */
112 AV *args; 231 struct coro *next_ready;
113 int refcnt;
114 232
115 /* optionally saved, might be zero */ 233 /* state data */
116 AV *defav; 234 struct CoroSLF slf_frame; /* saved slf frame */
117 SV *defsv;
118 SV *errsv;
119
120 /* saved global state not related to stacks */
121 U8 dowarn;
122 I32 in_eval;
123
124 /* the stacks and related info (callchain etc..) */
125 PERL_SI *curstackinfo;
126 AV *curstack;
127 AV *mainstack; 235 AV *mainstack;
128 SV **stack_sp; 236 perl_slots *slot; /* basically the saved sp */
129 OP *op; 237
130 SV **curpad; 238 CV *startcv; /* the CV to execute */
131 AV *comppad; 239 AV *args; /* data associated with this coroutine (initial args) */
132 CV *compcv; 240 int flags; /* CF_ flags */
133 SV **stack_base; 241 HV *hv; /* the perl hash associated with this coro, if any */
134 SV **stack_max; 242
135 SV **tmps_stack; 243 /* statistics */
136 I32 tmps_floor; 244 int usecount; /* number of transfers to this coro */
137 I32 tmps_ix;
138 I32 tmps_max;
139 I32 *markstack;
140 I32 *markstack_ptr;
141 I32 *markstack_max;
142 I32 *scopestack;
143 I32 scopestack_ix;
144 I32 scopestack_max;
145 ANY *savestack;
146 I32 savestack_ix;
147 I32 savestack_max;
148 OP **retstack;
149 I32 retstack_ix;
150 I32 retstack_max;
151 PMOP *curpm;
152 COP *curcop;
153 245
154 /* coro process data */ 246 /* coro process data */
155 int prio; 247 int prio;
248 SV *except; /* exception to be thrown */
249 SV *rouse_cb; /* last rouse callback */
250 AV *on_destroy; /* callbacks or coros to notify on destroy */
251 AV *status; /* the exit status list */
252
253 /* async_pool */
254 SV *saved_deffh;
255 SV *invoke_cb;
256 AV *invoke_av;
257
258 /* on_enter/on_leave */
259 AV *on_enter;
260 AV *on_leave;
261
262 /* swap_sv */
263 AV *swap_sv;
264
265 /* times */
266 coro_ts t_cpu, t_real;
267
268 /* linked list */
269 struct coro *next, *prev;
156}; 270};
157 271
158typedef struct coro *Coro__State; 272typedef struct coro *Coro__State;
159typedef struct coro *Coro__State_or_hashref; 273typedef struct coro *Coro__State_or_hashref;
160 274
275/* the following variables are effectively part of the perl context */
276/* and get copied between struct coro and these variables */
277/* the main reason we don't support windows process emulation */
278static struct CoroSLF slf_frame; /* the current slf frame */
279
280/** Coro ********************************************************************/
281
282#define CORO_PRIO_MAX 3
283#define CORO_PRIO_HIGH 1
284#define CORO_PRIO_NORMAL 0
285#define CORO_PRIO_LOW -1
286#define CORO_PRIO_IDLE -3
287#define CORO_PRIO_MIN -4
288
289/* for Coro.pm */
290static SV *coro_current;
291static SV *coro_readyhook;
292static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
293static CV *cv_coro_run;
294static struct coro *coro_first;
295#define coro_nready coroapi.nready
296
297/** JIT *********************************************************************/
298
299#if CORO_JIT
300 /* APPLE doesn't have HAVE_MMAP though */
301 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
302 #ifndef CORO_JIT_TYPE
303 #if __x86_64 && CORO_JIT_UNIXY
304 #define CORO_JIT_TYPE "amd64-unix"
305 #elif __i386 && CORO_JIT_UNIXY
306 #define CORO_JIT_TYPE "x86-unix"
307 #endif
308 #endif
309#endif
310
311#if !defined(CORO_JIT_TYPE) || !HAVE_MMAP
312 #undef CORO_JIT
313#endif
314
315#if CORO_JIT
316 typedef void (*load_save_perl_slots_type)(perl_slots *);
317 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
318#endif
319
320/** Coro::Select ************************************************************/
321
322static OP *(*coro_old_pp_sselect) (pTHX);
323static SV *coro_select_select;
324
325/* horrible hack, but if it works... */
161static AV * 326static OP *
327coro_pp_sselect (pTHX)
328{
329 dSP;
330 PUSHMARK (SP - 4); /* fake argument list */
331 XPUSHs (coro_select_select);
332 PUTBACK;
333
334 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
335 PL_op->op_flags |= OPf_STACKED;
336 PL_op->op_private = 0;
337 return PL_ppaddr [OP_ENTERSUB](aTHX);
338}
339
340/** time stuff **************************************************************/
341
342#ifdef HAS_GETTIMEOFDAY
343
344ecb_inline void
345coro_u2time (pTHX_ UV ret[2])
346{
347 struct timeval tv;
348 gettimeofday (&tv, 0);
349
350 ret [0] = tv.tv_sec;
351 ret [1] = tv.tv_usec;
352}
353
354ecb_inline double
355coro_nvtime (void)
356{
357 struct timeval tv;
358 gettimeofday (&tv, 0);
359
360 return tv.tv_sec + tv.tv_usec * 1e-6;
361}
362
363ecb_inline void
364time_init (pTHX)
365{
366 nvtime = coro_nvtime;
367 u2time = coro_u2time;
368}
369
370#else
371
372ecb_inline void
373time_init (pTHX)
374{
375 SV **svp;
376
377 require_pv ("Time/HiRes.pm");
378
379 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
380
381 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
382 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
383
384 nvtime = INT2PTR (double (*)(), SvIV (*svp));
385
386 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
387 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
388}
389
390#endif
391
392/** lowlevel stuff **********************************************************/
393
394static SV * ecb_noinline
395coro_get_sv (pTHX_ const char *name, int create)
396{
397#if PERL_VERSION_ATLEAST (5,10,0)
398 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
399 get_sv (name, create);
400#endif
401 return get_sv (name, create);
402}
403
404static AV * ecb_noinline
405coro_get_av (pTHX_ const char *name, int create)
406{
407#if PERL_VERSION_ATLEAST (5,10,0)
408 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
409 get_av (name, create);
410#endif
411 return get_av (name, create);
412}
413
414static HV * ecb_noinline
415coro_get_hv (pTHX_ const char *name, int create)
416{
417#if PERL_VERSION_ATLEAST (5,10,0)
418 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
419 get_hv (name, create);
420#endif
421 return get_hv (name, create);
422}
423
424ecb_inline void
425coro_times_update (void)
426{
427#ifdef coro_clock_gettime
428 struct timespec ts;
429
430 ts.tv_sec = ts.tv_nsec = 0;
431 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
432 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
433
434 ts.tv_sec = ts.tv_nsec = 0;
435 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
436 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
437#else
438 dTHX;
439 UV tv[2];
440
441 u2time (aTHX_ tv);
442 time_real [0] = tv [0];
443 time_real [1] = tv [1] * 1000;
444#endif
445}
446
447ecb_inline void
448coro_times_add (struct coro *c)
449{
450 c->t_real [1] += time_real [1];
451 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
452 c->t_real [0] += time_real [0];
453
454 c->t_cpu [1] += time_cpu [1];
455 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
456 c->t_cpu [0] += time_cpu [0];
457}
458
459ecb_inline void
460coro_times_sub (struct coro *c)
461{
462 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
463 c->t_real [1] -= time_real [1];
464 c->t_real [0] -= time_real [0];
465
466 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
467 c->t_cpu [1] -= time_cpu [1];
468 c->t_cpu [0] -= time_cpu [0];
469}
470
471/*****************************************************************************/
472/* magic glue */
473
474#define CORO_MAGIC_type_cv 26
475#define CORO_MAGIC_type_state PERL_MAGIC_ext
476
477#define CORO_MAGIC_NN(sv, type) \
478 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
479 ? SvMAGIC (sv) \
480 : mg_find (sv, type))
481
482#define CORO_MAGIC(sv, type) \
483 (ecb_expect_true (SvMAGIC (sv)) \
484 ? CORO_MAGIC_NN (sv, type) \
485 : 0)
486
487#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
488#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
489
490ecb_inline MAGIC *
491SvSTATEhv_p (pTHX_ SV *coro)
492{
493 MAGIC *mg;
494
495 if (ecb_expect_true (
496 SvTYPE (coro) == SVt_PVHV
497 && (mg = CORO_MAGIC_state (coro))
498 && mg->mg_virtual == &coro_state_vtbl
499 ))
500 return mg;
501
502 return 0;
503}
504
505ecb_inline struct coro *
506SvSTATE_ (pTHX_ SV *coro)
507{
508 MAGIC *mg;
509
510 if (SvROK (coro))
511 coro = SvRV (coro);
512
513 mg = SvSTATEhv_p (aTHX_ coro);
514 if (!mg)
515 croak ("Coro::State object required");
516
517 return (struct coro *)mg->mg_ptr;
518}
519
520#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
521
522/* faster than SvSTATE, but expects a coroutine hv */
523#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
524#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
525
526/*****************************************************************************/
527/* padlist management and caching */
528
529ecb_inline AV *
162coro_clone_padlist (pTHX_ CV *cv) 530coro_derive_padlist (pTHX_ CV *cv)
163{ 531{
164 AV *padlist = CvPADLIST (cv); 532 AV *padlist = CvPADLIST (cv);
165 AV *newpadlist, *newpad; 533 AV *newpadlist, *newpad;
166 534
167 newpadlist = newAV (); 535 newpadlist = newAV ();
168 AvREAL_off (newpadlist); 536 AvREAL_off (newpadlist);
169#if PERL_VERSION < 9 537#if PERL_VERSION_ATLEAST (5,10,0)
538 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
539#else
170 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 540 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
171#else
172 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
173#endif 541#endif
174 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 542 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
175 --AvFILLp (padlist); 543 --AvFILLp (padlist);
176 544
177 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 545 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
178 av_store (newpadlist, 1, (SV *)newpad); 546 av_store (newpadlist, 1, (SV *)newpad);
179 547
180 return newpadlist; 548 return newpadlist;
181} 549}
182 550
183static void 551ecb_inline void
184free_padlist (pTHX_ AV *padlist) 552free_padlist (pTHX_ AV *padlist)
185{ 553{
186 /* may be during global destruction */ 554 /* may be during global destruction */
187 if (SvREFCNT (padlist)) 555 if (!IN_DESTRUCT)
188 { 556 {
189 I32 i = AvFILLp (padlist); 557 I32 i = AvFILLp (padlist);
190 while (i >= 0) 558
559 while (i > 0) /* special-case index 0 */
191 { 560 {
192 SV **svp = av_fetch (padlist, i--, FALSE); 561 /* we try to be extra-careful here */
193 if (svp) 562 AV *av = (AV *)AvARRAY (padlist)[i--];
194 { 563 I32 j = AvFILLp (av);
195 SV *sv; 564
196 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 565 while (j >= 0)
566 SvREFCNT_dec (AvARRAY (av)[j--]);
567
568 AvFILLp (av) = -1;
197 SvREFCNT_dec (sv); 569 SvREFCNT_dec (av);
198
199 SvREFCNT_dec (*svp);
200 }
201 } 570 }
202 571
572 SvREFCNT_dec (AvARRAY (padlist)[0]);
573
574 AvFILLp (padlist) = -1;
203 SvREFCNT_dec ((SV*)padlist); 575 SvREFCNT_dec ((SV*)padlist);
204 } 576 }
205} 577}
206 578
207static int 579static int
208coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 580coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
209{ 581{
210 AV *padlist; 582 AV *padlist;
211 AV *av = (AV *)mg->mg_obj; 583 AV *av = (AV *)mg->mg_obj;
584
585 /* perl manages to free our internal AV and _then_ call us */
586 if (IN_DESTRUCT)
587 return 0;
212 588
213 /* casting is fun. */ 589 /* casting is fun. */
214 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 590 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
215 free_padlist (aTHX_ padlist); 591 free_padlist (aTHX_ padlist);
216 592
217 SvREFCNT_dec (av); 593 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
218 594
219 return 0; 595 return 0;
220} 596}
221 597
222#define PERL_MAGIC_coro PERL_MAGIC_ext 598static MGVTBL coro_cv_vtbl = {
223 599 0, 0, 0, 0,
224static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 600 coro_cv_free
601};
225 602
226/* the next two functions merely cache the padlists */ 603/* the next two functions merely cache the padlists */
227static void 604ecb_inline void
228get_padlist (pTHX_ CV *cv) 605get_padlist (pTHX_ CV *cv)
229{ 606{
230 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 607 MAGIC *mg = CORO_MAGIC_cv (cv);
608 AV *av;
231 609
232 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 610 if (ecb_expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
233 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 611 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
234 else 612 else
235 { 613 {
236#if 0 614#if CORO_PREFER_PERL_FUNCTIONS
237 /* this should work - but it doesn't :( */ 615 /* this is probably cleaner? but also slower! */
616 /* in practise, it seems to be less stable */
238 CV *cp = Perl_cv_clone (aTHX_ cv); 617 CV *cp = Perl_cv_clone (aTHX_ cv);
239 CvPADLIST (cv) = CvPADLIST (cp); 618 CvPADLIST (cv) = CvPADLIST (cp);
240 CvPADLIST (cp) = 0; 619 CvPADLIST (cp) = 0;
241 SvREFCNT_dec (cp); 620 SvREFCNT_dec (cp);
242#else 621#else
243 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 622 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
244#endif 623#endif
245 } 624 }
246} 625}
247 626
248static void 627ecb_inline void
249put_padlist (pTHX_ CV *cv) 628put_padlist (pTHX_ CV *cv)
250{ 629{
251 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 630 MAGIC *mg = CORO_MAGIC_cv (cv);
631 AV *av;
252 632
253 if (!mg) 633 if (ecb_expect_false (!mg))
634 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
635
636 av = (AV *)mg->mg_obj;
637
638 if (ecb_expect_false (AvFILLp (av) >= AvMAX (av)))
639 av_extend (av, AvFILLp (av) + 1);
640
641 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
642}
643
644/** load & save, init *******************************************************/
645
646ecb_inline void
647swap_sv (SV *a, SV *b)
648{
649 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
650 SV tmp;
651
652 /* swap sv_any */
653 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
654
655 /* swap sv_flags */
656 SvFLAGS (&tmp) = SvFLAGS (a);
657 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
658 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
659
660#if PERL_VERSION_ATLEAST (5,10,0)
661 /* perl 5.10 and later complicates this _quite_ a bit, but it also
662 * is much faster, so no quarrels here. alternatively, we could
663 * sv_upgrade to avoid this.
664 */
254 { 665 {
255 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0); 666 /* swap sv_u */
256 mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 667 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
257 mg->mg_virtual = &vtbl_coro; 668
258 mg->mg_obj = (SV *)newAV (); 669 /* if SvANY points to the head, we need to adjust the pointers,
670 * as the pointer for a still points to b, and maybe vice versa.
671 */
672 #define svany_in_head(type) \
673 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
674
675 if (svany_in_head (SvTYPE (a)))
676 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
677
678 if (svany_in_head (SvTYPE (b)))
679 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
259 } 680 }
260 681#endif
261 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));
262} 682}
263 683
264#define SB do { 684/* swap sv heads, at least logically */
265#define SE } while (0)
266
267#define LOAD(state) load_state(aTHX_ (state));
268#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
269
270#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
271
272static void 685static void
686swap_svs (pTHX_ Coro__State c)
687{
688 int i;
689
690 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
691 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
692}
693
694#define SWAP_SVS(coro) \
695 if (ecb_expect_false ((coro)->swap_sv)) \
696 swap_svs (aTHX_ (coro))
697
698static void
699on_enterleave_call (pTHX_ SV *cb);
700
701static void
273load_state(pTHX_ Coro__State c) 702load_perl (pTHX_ Coro__State c)
274{ 703{
275 PL_dowarn = c->dowarn; 704 perl_slots *slot = c->slot;
276 PL_in_eval = c->in_eval; 705 c->slot = 0;
277 706
278 PL_curstackinfo = c->curstackinfo;
279 PL_curstack = c->curstack;
280 PL_mainstack = c->mainstack; 707 PL_mainstack = c->mainstack;
281 PL_stack_sp = c->stack_sp;
282 PL_op = c->op;
283 PL_curpad = c->curpad;
284 PL_comppad = c->comppad;
285 PL_compcv = c->compcv;
286 PL_stack_base = c->stack_base;
287 PL_stack_max = c->stack_max;
288 PL_tmps_stack = c->tmps_stack;
289 PL_tmps_floor = c->tmps_floor;
290 PL_tmps_ix = c->tmps_ix;
291 PL_tmps_max = c->tmps_max;
292 PL_markstack = c->markstack;
293 PL_markstack_ptr = c->markstack_ptr;
294 PL_markstack_max = c->markstack_max;
295 PL_scopestack = c->scopestack;
296 PL_scopestack_ix = c->scopestack_ix;
297 PL_scopestack_max = c->scopestack_max;
298 PL_savestack = c->savestack;
299 PL_savestack_ix = c->savestack_ix;
300 PL_savestack_max = c->savestack_max;
301#if PERL_VERSION < 9
302 PL_retstack = c->retstack;
303 PL_retstack_ix = c->retstack_ix;
304 PL_retstack_max = c->retstack_max;
305#endif
306 PL_curpm = c->curpm;
307 PL_curcop = c->curcop;
308 708
309 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 709#if CORO_JIT
310 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 710 load_perl_slots (slot);
311 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 711#else
712 #define VARx(name,expr,type) expr = slot->name;
713 #include "state.h"
714#endif
312 715
313 { 716 {
314 dSP; 717 dSP;
718
315 CV *cv; 719 CV *cv;
316 720
317 /* now do the ugly restore mess */ 721 /* now do the ugly restore mess */
318 while ((cv = (CV *)POPs)) 722 while (ecb_expect_true (cv = (CV *)POPs))
319 { 723 {
320 AV *padlist = (AV *)POPs;
321
322 if (padlist)
323 {
324 put_padlist (aTHX_ cv); /* mark this padlist as available */ 724 put_padlist (aTHX_ cv); /* mark this padlist as available */
325 CvPADLIST(cv) = padlist; 725 CvDEPTH (cv) = PTR2IV (POPs);
326 } 726 CvPADLIST (cv) = (AV *)POPs;
327
328 ++CvDEPTH(cv);
329 } 727 }
330 728
331 PUTBACK; 729 PUTBACK;
332 } 730 }
333}
334 731
732 slf_frame = c->slf_frame;
733 CORO_THROW = c->except;
734
735 if (ecb_expect_false (enable_times))
736 {
737 if (ecb_expect_false (!times_valid))
738 coro_times_update ();
739
740 coro_times_sub (c);
741 }
742
743 if (ecb_expect_false (c->on_enter))
744 {
745 int i;
746
747 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
748 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
749 }
750
751 SWAP_SVS (c);
752}
753
335static void 754static void
336save_state(pTHX_ Coro__State c, int flags) 755save_perl (pTHX_ Coro__State c)
337{ 756{
757 SWAP_SVS (c);
758
759 if (ecb_expect_false (c->on_leave))
760 {
761 int i;
762
763 for (i = AvFILLp (c->on_leave); i >= 0; --i)
764 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
765 }
766
767 times_valid = 0;
768
769 if (ecb_expect_false (enable_times))
770 {
771 coro_times_update (); times_valid = 1;
772 coro_times_add (c);
773 }
774
775 c->except = CORO_THROW;
776 c->slf_frame = slf_frame;
777
338 { 778 {
339 dSP; 779 dSP;
340 I32 cxix = cxstack_ix; 780 I32 cxix = cxstack_ix;
341 PERL_CONTEXT *ccstk = cxstack; 781 PERL_CONTEXT *ccstk = cxstack;
342 PERL_SI *top_si = PL_curstackinfo; 782 PERL_SI *top_si = PL_curstackinfo;
… …
344 /* 784 /*
345 * the worst thing you can imagine happens first - we have to save 785 * the worst thing you can imagine happens first - we have to save
346 * (and reinitialize) all cv's in the whole callchain :( 786 * (and reinitialize) all cv's in the whole callchain :(
347 */ 787 */
348 788
349 PUSHs (Nullsv); 789 XPUSHs (Nullsv);
350 /* this loop was inspired by pp_caller */ 790 /* this loop was inspired by pp_caller */
351 for (;;) 791 for (;;)
352 { 792 {
353 while (cxix >= 0) 793 while (ecb_expect_true (cxix >= 0))
354 { 794 {
355 PERL_CONTEXT *cx = &ccstk[cxix--]; 795 PERL_CONTEXT *cx = &ccstk[cxix--];
356 796
357 if (CxTYPE(cx) == CXt_SUB) 797 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
358 { 798 {
359 CV *cv = cx->blk_sub.cv; 799 CV *cv = cx->blk_sub.cv;
800
360 if (CvDEPTH(cv)) 801 if (ecb_expect_true (CvDEPTH (cv)))
361 { 802 {
362 EXTEND (SP, CvDEPTH(cv)*2); 803 EXTEND (SP, 3);
363
364 while (--CvDEPTH(cv))
365 {
366 /* this tells the restore code to increment CvDEPTH */
367 PUSHs (Nullsv);
368 PUSHs ((SV *)cv);
369 }
370
371 PUSHs ((SV *)CvPADLIST(cv)); 804 PUSHs ((SV *)CvPADLIST (cv));
805 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
372 PUSHs ((SV *)cv); 806 PUSHs ((SV *)cv);
373 807
808 CvDEPTH (cv) = 0;
374 get_padlist (aTHX_ cv); 809 get_padlist (aTHX_ cv);
375 } 810 }
376 } 811 }
377#ifdef CXt_FORMAT
378 else if (CxTYPE(cx) == CXt_FORMAT)
379 {
380 /* I never used formats, so how should I know how these are implemented? */
381 /* my bold guess is as a simple, plain sub... */
382 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
383 }
384#endif
385 } 812 }
386 813
387 if (top_si->si_type == PERLSI_MAIN) 814 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
388 break; 815 break;
389 816
390 top_si = top_si->si_prev; 817 top_si = top_si->si_prev;
391 ccstk = top_si->si_cxstack; 818 ccstk = top_si->si_cxstack;
392 cxix = top_si->si_cxix; 819 cxix = top_si->si_cxix;
393 } 820 }
394 821
395 PUTBACK; 822 PUTBACK;
396 } 823 }
397 824
398 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 825 /* allocate some space on the context stack for our purposes */
399 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 826 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
400 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 827 {
828 unsigned int i;
401 829
402 c->dowarn = PL_dowarn; 830 for (i = 0; i < SLOT_COUNT; ++i)
403 c->in_eval = PL_in_eval; 831 CXINC;
404 832
405 c->curstackinfo = PL_curstackinfo; 833 cxstack_ix -= SLOT_COUNT; /* undo allocation */
406 c->curstack = PL_curstack; 834 }
835
407 c->mainstack = PL_mainstack; 836 c->mainstack = PL_mainstack;
408 c->stack_sp = PL_stack_sp; 837
409 c->op = PL_op; 838 {
410 c->curpad = PL_curpad; 839 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
411 c->comppad = PL_comppad; 840
412 c->compcv = PL_compcv; 841#if CORO_JIT
413 c->stack_base = PL_stack_base; 842 save_perl_slots (slot);
414 c->stack_max = PL_stack_max; 843#else
415 c->tmps_stack = PL_tmps_stack; 844 #define VARx(name,expr,type) slot->name = expr;
416 c->tmps_floor = PL_tmps_floor; 845 #include "state.h"
417 c->tmps_ix = PL_tmps_ix;
418 c->tmps_max = PL_tmps_max;
419 c->markstack = PL_markstack;
420 c->markstack_ptr = PL_markstack_ptr;
421 c->markstack_max = PL_markstack_max;
422 c->scopestack = PL_scopestack;
423 c->scopestack_ix = PL_scopestack_ix;
424 c->scopestack_max = PL_scopestack_max;
425 c->savestack = PL_savestack;
426 c->savestack_ix = PL_savestack_ix;
427 c->savestack_max = PL_savestack_max;
428#if PERL_VERSION < 9
429 c->retstack = PL_retstack;
430 c->retstack_ix = PL_retstack_ix;
431 c->retstack_max = PL_retstack_max;
432#endif 846#endif
433 c->curpm = PL_curpm; 847 }
434 c->curcop = PL_curcop;
435} 848}
436 849
437/* 850/*
438 * allocate various perl stacks. This is an exact copy 851 * allocate various perl stacks. This is almost an exact copy
439 * of perl.c:init_stacks, except that it uses less memory 852 * of perl.c:init_stacks, except that it uses less memory
440 * on the (sometimes correct) assumption that coroutines do 853 * on the (sometimes correct) assumption that coroutines do
441 * not usually need a lot of stackspace. 854 * not usually need a lot of stackspace.
442 */ 855 */
856#if CORO_PREFER_PERL_FUNCTIONS
857# define coro_init_stacks(thx) init_stacks ()
858#else
443static void 859static void
444coro_init_stacks (pTHX) 860coro_init_stacks (pTHX)
445{ 861{
446 LOCK; 862 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
447
448 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
449 PL_curstackinfo->si_type = PERLSI_MAIN; 863 PL_curstackinfo->si_type = PERLSI_MAIN;
450 PL_curstack = PL_curstackinfo->si_stack; 864 PL_curstack = PL_curstackinfo->si_stack;
451 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 865 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
452 866
453 PL_stack_base = AvARRAY(PL_curstack); 867 PL_stack_base = AvARRAY(PL_curstack);
454 PL_stack_sp = PL_stack_base; 868 PL_stack_sp = PL_stack_base;
455 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 869 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
456 870
457 New(50,PL_tmps_stack,96,SV*); 871 New(50,PL_tmps_stack,32,SV*);
458 PL_tmps_floor = -1; 872 PL_tmps_floor = -1;
459 PL_tmps_ix = -1; 873 PL_tmps_ix = -1;
460 PL_tmps_max = 96; 874 PL_tmps_max = 32;
461 875
462 New(54,PL_markstack,16,I32); 876 New(54,PL_markstack,16,I32);
463 PL_markstack_ptr = PL_markstack; 877 PL_markstack_ptr = PL_markstack;
464 PL_markstack_max = PL_markstack + 16; 878 PL_markstack_max = PL_markstack + 16;
465 879
466#ifdef SET_MARK_OFFSET 880#ifdef SET_MARK_OFFSET
467 SET_MARK_OFFSET; 881 SET_MARK_OFFSET;
468#endif 882#endif
469 883
470 New(54,PL_scopestack,16,I32); 884 New(54,PL_scopestack,8,I32);
471 PL_scopestack_ix = 0; 885 PL_scopestack_ix = 0;
472 PL_scopestack_max = 16; 886 PL_scopestack_max = 8;
887#if HAS_SCOPESTACK_NAME
888 New(54,PL_scopestack_name,8,const char*);
889#endif
473 890
474 New(54,PL_savestack,96,ANY); 891 New(54,PL_savestack,24,ANY);
475 PL_savestack_ix = 0; 892 PL_savestack_ix = 0;
476 PL_savestack_max = 96; 893 PL_savestack_max = 24;
477 894
478#if PERL_VERSION < 9 895#if !PERL_VERSION_ATLEAST (5,10,0)
479 New(54,PL_retstack,8,OP*); 896 New(54,PL_retstack,4,OP*);
480 PL_retstack_ix = 0; 897 PL_retstack_ix = 0;
481 PL_retstack_max = 8; 898 PL_retstack_max = 4;
482#endif 899#endif
483
484 UNLOCK;
485} 900}
901#endif
486 902
487/* 903/*
488 * destroy the stacks, the callchain etc... 904 * destroy the stacks, the callchain etc...
489 */ 905 */
490static void 906static void
491destroy_stacks(pTHX) 907coro_destruct_stacks (pTHX)
492{ 908{
493 if (!IN_DESTRUCT)
494 {
495 /* is this ugly, I ask? */
496 LEAVE_SCOPE (0);
497
498 /* sure it is, but more important: is it correct?? :/ */
499 FREETMPS;
500
501 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
502 }
503
504 while (PL_curstackinfo->si_next) 909 while (PL_curstackinfo->si_next)
505 PL_curstackinfo = PL_curstackinfo->si_next; 910 PL_curstackinfo = PL_curstackinfo->si_next;
506 911
507 while (PL_curstackinfo) 912 while (PL_curstackinfo)
508 { 913 {
509 PERL_SI *p = PL_curstackinfo->si_prev; 914 PERL_SI *p = PL_curstackinfo->si_prev;
510 915
511 { /*D*//*remove*/
512 dSP;
513 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
514 PUTBACK; /* possibly superfluous */
515 }
516
517 if (!IN_DESTRUCT) 916 if (!IN_DESTRUCT)
518 {
519 dounwind (-1);/*D*//*remove*/
520 SvREFCNT_dec (PL_curstackinfo->si_stack); 917 SvREFCNT_dec (PL_curstackinfo->si_stack);
521 }
522 918
523 Safefree (PL_curstackinfo->si_cxstack); 919 Safefree (PL_curstackinfo->si_cxstack);
524 Safefree (PL_curstackinfo); 920 Safefree (PL_curstackinfo);
525 PL_curstackinfo = p; 921 PL_curstackinfo = p;
526 } 922 }
527 923
528 Safefree (PL_tmps_stack); 924 Safefree (PL_tmps_stack);
529 Safefree (PL_markstack); 925 Safefree (PL_markstack);
530 Safefree (PL_scopestack); 926 Safefree (PL_scopestack);
927#if HAS_SCOPESTACK_NAME
928 Safefree (PL_scopestack_name);
929#endif
531 Safefree (PL_savestack); 930 Safefree (PL_savestack);
532#if PERL_VERSION < 9 931#if !PERL_VERSION_ATLEAST (5,10,0)
533 Safefree (PL_retstack); 932 Safefree (PL_retstack);
534#endif 933#endif
535} 934}
536 935
936#define CORO_RSS \
937 rss += sizeof (SYM (curstackinfo)); \
938 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
939 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
940 rss += SYM (tmps_max) * sizeof (SV *); \
941 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
942 rss += SYM (scopestack_max) * sizeof (I32); \
943 rss += SYM (savestack_max) * sizeof (ANY);
944
945static size_t
946coro_rss (pTHX_ struct coro *coro)
947{
948 size_t rss = sizeof (*coro);
949
950 if (coro->mainstack)
951 {
952 if (coro->flags & CF_RUNNING)
953 {
954 #define SYM(sym) PL_ ## sym
955 CORO_RSS;
956 #undef SYM
957 }
958 else
959 {
960 #define SYM(sym) coro->slot->sym
961 CORO_RSS;
962 #undef SYM
963 }
964 }
965
966 return rss;
967}
968
969/** coroutine stack handling ************************************************/
970
971static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
972static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
973static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
974
975/* apparently < 5.8.8 */
976#ifndef MgPV_nolen_const
977#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
978 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
979 (const char*)(mg)->mg_ptr)
980#endif
981
982/*
983 * This overrides the default magic get method of %SIG elements.
984 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
985 * and instead of trying to save and restore the hash elements (extremely slow),
986 * we just provide our own readback here.
987 */
988static int ecb_cold
989coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
990{
991 const char *s = MgPV_nolen_const (mg);
992
993 if (*s == '_')
994 {
995 SV **svp = 0;
996
997 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
998 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
999
1000 if (svp)
1001 {
1002 SV *ssv;
1003
1004 if (!*svp)
1005 ssv = &PL_sv_undef;
1006 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1007 ssv = sv_2mortal (newRV_inc (*svp));
1008 else
1009 ssv = *svp;
1010
1011 sv_setsv (sv, ssv);
1012 return 0;
1013 }
1014 }
1015
1016 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1017}
1018
1019static int ecb_cold
1020coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1021{
1022 const char *s = MgPV_nolen_const (mg);
1023
1024 if (*s == '_')
1025 {
1026 SV **svp = 0;
1027
1028 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1029 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1030
1031 if (svp)
1032 {
1033 SV *old = *svp;
1034 *svp = 0;
1035 SvREFCNT_dec (old);
1036 return 0;
1037 }
1038 }
1039
1040 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1041}
1042
1043static int ecb_cold
1044coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1045{
1046 const char *s = MgPV_nolen_const (mg);
1047
1048 if (*s == '_')
1049 {
1050 SV **svp = 0;
1051
1052 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1053 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1054
1055 if (svp)
1056 {
1057 SV *old = *svp;
1058 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1059 SvREFCNT_dec (old);
1060 return 0;
1061 }
1062 }
1063
1064 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1065}
1066
1067static void
1068prepare_nop (pTHX_ struct coro_transfer_args *ta)
1069{
1070 /* kind of mega-hacky, but works */
1071 ta->next = ta->prev = (struct coro *)ta;
1072}
1073
537static void 1074static int
538setup_coro (struct coro *coro) 1075slf_check_nop (pTHX_ struct CoroSLF *frame)
1076{
1077 return 0;
1078}
1079
1080static int
1081slf_check_repeat (pTHX_ struct CoroSLF *frame)
1082{
1083 return 1;
1084}
1085
1086static UNOP init_perl_op;
1087
1088ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1089init_perl (pTHX_ struct coro *coro)
539{ 1090{
540 /* 1091 /*
541 * emulate part of the perl startup here. 1092 * emulate part of the perl startup here.
542 */ 1093 */
1094 coro_init_stacks (aTHX);
1095
1096 PL_runops = RUNOPS_DEFAULT;
1097 PL_curcop = &PL_compiling;
1098 PL_in_eval = EVAL_NULL;
1099 PL_comppad = 0;
1100 PL_comppad_name = 0;
1101 PL_comppad_name_fill = 0;
1102 PL_comppad_name_floor = 0;
1103 PL_curpm = 0;
1104 PL_curpad = 0;
1105 PL_localizing = 0;
1106 PL_restartop = 0;
1107#if PERL_VERSION_ATLEAST (5,10,0)
1108 PL_parser = 0;
1109#endif
1110 PL_hints = 0;
1111
1112 /* recreate the die/warn hooks */
1113 PL_diehook = SvREFCNT_inc (rv_diehook);
1114 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1115
1116 GvSV (PL_defgv) = newSV (0);
1117 GvAV (PL_defgv) = coro->args; coro->args = 0;
1118 GvSV (PL_errgv) = newSV (0);
1119 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1120 GvHV (PL_hintgv) = 0;
1121 PL_rs = newSVsv (GvSV (irsgv));
1122 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1123
1124 {
1125 dSP;
1126 UNOP myop;
1127
1128 Zero (&myop, 1, UNOP);
1129 myop.op_next = Nullop;
1130 myop.op_type = OP_ENTERSUB;
1131 myop.op_flags = OPf_WANT_VOID;
1132
1133 PUSHMARK (SP);
1134 PUSHs ((SV *)coro->startcv);
1135 PUTBACK;
1136 PL_op = (OP *)&myop;
1137 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1138 }
1139
1140 /* this newly created coroutine might be run on an existing cctx which most
1141 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1142 */
1143 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1144 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1145 slf_frame.destroy = 0;
1146
1147 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1148 init_perl_op.op_next = PL_op;
1149 init_perl_op.op_type = OP_ENTERSUB;
1150 init_perl_op.op_ppaddr = pp_slf;
1151 /* no flags etc. required, as an init function won't be called */
1152
1153 PL_op = (OP *)&init_perl_op;
1154
1155 /* copy throw, in case it was set before init_perl */
1156 CORO_THROW = coro->except;
1157
1158 SWAP_SVS (coro);
1159
1160 if (ecb_expect_false (enable_times))
1161 {
1162 coro_times_update ();
1163 coro_times_sub (coro);
1164 }
1165}
1166
1167static void
1168coro_unwind_stacks (pTHX)
1169{
1170 if (!IN_DESTRUCT)
1171 {
1172 /* restore all saved variables and stuff */
1173 LEAVE_SCOPE (0);
1174 assert (PL_tmps_floor == -1);
1175
1176 /* free all temporaries */
1177 FREETMPS;
1178 assert (PL_tmps_ix == -1);
1179
1180 /* unwind all extra stacks */
1181 POPSTACK_TO (PL_mainstack);
1182
1183 /* unwind main stack */
1184 dounwind (-1);
1185 }
1186}
1187
1188static void
1189destroy_perl (pTHX_ struct coro *coro)
1190{
1191 SV *svf [9];
1192
1193 {
1194 SV *old_current = SvRV (coro_current);
1195 struct coro *current = SvSTATE (old_current);
1196
1197 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1198
1199 save_perl (aTHX_ current);
1200
1201 /* this will cause transfer_check to croak on block*/
1202 SvRV_set (coro_current, (SV *)coro->hv);
1203
1204 load_perl (aTHX_ coro);
1205
1206 coro_unwind_stacks (aTHX);
1207
1208 /* restore swapped sv's */
1209 SWAP_SVS (coro);
1210
1211 coro_destruct_stacks (aTHX);
1212
1213 /* now save some sv's to be free'd later */
1214 svf [0] = GvSV (PL_defgv);
1215 svf [1] = (SV *)GvAV (PL_defgv);
1216 svf [2] = GvSV (PL_errgv);
1217 svf [3] = (SV *)PL_defoutgv;
1218 svf [4] = PL_rs;
1219 svf [5] = GvSV (irsgv);
1220 svf [6] = (SV *)GvHV (PL_hintgv);
1221 svf [7] = PL_diehook;
1222 svf [8] = PL_warnhook;
1223 assert (9 == sizeof (svf) / sizeof (*svf));
1224
1225 SvRV_set (coro_current, old_current);
1226
1227 load_perl (aTHX_ current);
1228 }
1229
1230 {
1231 unsigned int i;
1232
1233 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1234 SvREFCNT_dec (svf [i]);
1235
1236 SvREFCNT_dec (coro->saved_deffh);
1237 SvREFCNT_dec (coro->rouse_cb);
1238 SvREFCNT_dec (coro->invoke_cb);
1239 SvREFCNT_dec (coro->invoke_av);
1240 }
1241}
1242
1243ecb_inline void
1244free_coro_mortal (pTHX)
1245{
1246 if (ecb_expect_true (coro_mortal))
1247 {
1248 SvREFCNT_dec ((SV *)coro_mortal);
1249 coro_mortal = 0;
1250 }
1251}
1252
1253static int
1254runops_trace (pTHX)
1255{
1256 COP *oldcop = 0;
1257 int oldcxix = -2;
1258
1259 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1260 {
1261 PERL_ASYNC_CHECK ();
1262
1263 if (cctx_current->flags & CC_TRACE_ALL)
1264 {
1265 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1266 {
1267 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1268 SV **bot, **top;
1269 AV *av = newAV (); /* return values */
1270 SV **cb;
1271 dSP;
1272
1273 GV *gv = CvGV (cx->blk_sub.cv);
1274 SV *fullname = sv_2mortal (newSV (0));
1275 if (isGV (gv))
1276 gv_efullname3 (fullname, gv, 0);
1277
1278 bot = PL_stack_base + cx->blk_oldsp + 1;
1279 top = cx->blk_gimme == G_ARRAY ? SP + 1
1280 : cx->blk_gimme == G_SCALAR ? bot + 1
1281 : bot;
1282
1283 av_extend (av, top - bot);
1284 while (bot < top)
1285 av_push (av, SvREFCNT_inc_NN (*bot++));
1286
1287 PL_runops = RUNOPS_DEFAULT;
1288 ENTER;
1289 SAVETMPS;
1290 EXTEND (SP, 3);
1291 PUSHMARK (SP);
1292 PUSHs (&PL_sv_no);
1293 PUSHs (fullname);
1294 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1295 PUTBACK;
1296 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1297 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1298 SPAGAIN;
1299 FREETMPS;
1300 LEAVE;
1301 PL_runops = runops_trace;
1302 }
1303
1304 if (oldcop != PL_curcop)
1305 {
1306 oldcop = PL_curcop;
1307
1308 if (PL_curcop != &PL_compiling)
1309 {
1310 SV **cb;
1311
1312 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1313 {
1314 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1315
1316 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1317 {
1318 dSP;
1319 GV *gv = CvGV (cx->blk_sub.cv);
1320 SV *fullname = sv_2mortal (newSV (0));
1321
1322 if (isGV (gv))
1323 gv_efullname3 (fullname, gv, 0);
1324
1325 PL_runops = RUNOPS_DEFAULT;
1326 ENTER;
1327 SAVETMPS;
1328 EXTEND (SP, 3);
1329 PUSHMARK (SP);
1330 PUSHs (&PL_sv_yes);
1331 PUSHs (fullname);
1332 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1333 PUTBACK;
1334 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1335 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1336 SPAGAIN;
1337 FREETMPS;
1338 LEAVE;
1339 PL_runops = runops_trace;
1340 }
1341
1342 oldcxix = cxstack_ix;
1343 }
1344
1345 if (cctx_current->flags & CC_TRACE_LINE)
1346 {
1347 dSP;
1348
1349 PL_runops = RUNOPS_DEFAULT;
1350 ENTER;
1351 SAVETMPS;
1352 EXTEND (SP, 3);
1353 PL_runops = RUNOPS_DEFAULT;
1354 PUSHMARK (SP);
1355 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1356 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1357 PUTBACK;
1358 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1359 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1360 SPAGAIN;
1361 FREETMPS;
1362 LEAVE;
1363 PL_runops = runops_trace;
1364 }
1365 }
1366 }
1367 }
1368 }
1369
1370 TAINT_NOT;
1371 return 0;
1372}
1373
1374static struct CoroSLF cctx_ssl_frame;
1375
1376static void
1377slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1378{
1379 ta->prev = 0;
1380}
1381
1382static int
1383slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1384{
1385 *frame = cctx_ssl_frame;
1386
1387 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1388}
1389
1390/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1391static void ecb_noinline
1392cctx_prepare (pTHX)
1393{
1394 PL_top_env = &PL_start_env;
1395
1396 if (cctx_current->flags & CC_TRACE)
1397 PL_runops = runops_trace;
1398
1399 /* we already must be executing an SLF op, there is no other valid way
1400 * that can lead to creation of a new cctx */
1401 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1402 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1403
1404 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1405 cctx_ssl_frame = slf_frame;
1406
1407 slf_frame.prepare = slf_prepare_set_stacklevel;
1408 slf_frame.check = slf_check_set_stacklevel;
1409}
1410
1411/* the tail of transfer: execute stuff we can only do after a transfer */
1412ecb_inline void
1413transfer_tail (pTHX)
1414{
1415 free_coro_mortal (aTHX);
1416}
1417
1418/* try to exit the same way perl's main function would do */
1419/* we do not bother resetting the environment or other things *7
1420/* that are not, uhm, essential */
1421/* this obviously also doesn't work when perl is embedded */
1422static void ecb_noinline ecb_cold
1423perlish_exit (pTHX)
1424{
1425 int exitstatus = perl_destruct (PL_curinterp);
1426 perl_free (PL_curinterp);
1427 exit (exitstatus);
1428}
1429
1430/*
1431 * this is a _very_ stripped down perl interpreter ;)
1432 */
1433static void
1434cctx_run (void *arg)
1435{
1436#ifdef USE_ITHREADS
1437# if CORO_PTHREAD
1438 PERL_SET_CONTEXT (coro_thx);
1439# endif
1440#endif
1441 {
1442 dTHX;
1443
1444 /* normally we would need to skip the entersub here */
1445 /* not doing so will re-execute it, which is exactly what we want */
1446 /* PL_nop = PL_nop->op_next */
1447
1448 /* inject a fake subroutine call to cctx_init */
1449 cctx_prepare (aTHX);
1450
1451 /* cctx_run is the alternative tail of transfer() */
1452 transfer_tail (aTHX);
1453
1454 /* somebody or something will hit me for both perl_run and PL_restartop */
1455 PL_restartop = PL_op;
1456 perl_run (PL_curinterp);
1457 /*
1458 * Unfortunately, there is no way to get at the return values of the
1459 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1460 * runtime errors here, as this is just a random interpreter, not a thread.
1461 */
1462
1463 /*
1464 * If perl-run returns we assume exit() was being called or the coro
1465 * fell off the end, which seems to be the only valid (non-bug)
1466 * reason for perl_run to return. We try to mimic whatever perl is normally
1467 * doing in that case. YMMV.
1468 */
1469 perlish_exit (aTHX);
1470 }
1471}
1472
1473static coro_cctx *
1474cctx_new (void)
1475{
1476 coro_cctx *cctx;
1477
1478 ++cctx_count;
1479 New (0, cctx, 1, coro_cctx);
1480
1481 cctx->gen = cctx_gen;
1482 cctx->flags = 0;
1483 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1484
1485 return cctx;
1486}
1487
1488/* create a new cctx only suitable as source */
1489static coro_cctx *
1490cctx_new_empty (void)
1491{
1492 coro_cctx *cctx = cctx_new ();
1493
1494 cctx->sptr = 0;
1495 coro_create (&cctx->cctx, 0, 0, 0, 0);
1496
1497 return cctx;
1498}
1499
1500/* create a new cctx suitable as destination/running a perl interpreter */
1501static coro_cctx *
1502cctx_new_run (void)
1503{
1504 coro_cctx *cctx = cctx_new ();
1505 void *stack_start;
1506 size_t stack_size;
1507
1508#if HAVE_MMAP
1509 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1510 /* mmap supposedly does allocate-on-write for us */
1511 cctx->sptr = mmap (0, cctx->ssize, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_ANONYMOUS, -1, 0);
1512
1513 if (cctx->sptr != (void *)-1)
1514 {
1515 #if CORO_STACKGUARD
1516 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1517 #endif
1518 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1519 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1520 cctx->flags |= CC_MAPPED;
1521 }
1522 else
1523#endif
1524 {
1525 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1526 New (0, cctx->sptr, cctx_stacksize, long);
1527
1528 if (!cctx->sptr)
1529 {
1530 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1531 _exit (EXIT_FAILURE);
1532 }
1533
1534 stack_start = cctx->sptr;
1535 stack_size = cctx->ssize;
1536 }
1537
1538 #if CORO_USE_VALGRIND
1539 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1540 #endif
1541
1542 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1543
1544 return cctx;
1545}
1546
1547static void
1548cctx_destroy (coro_cctx *cctx)
1549{
1550 if (!cctx)
1551 return;
1552
1553 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1554
1555 --cctx_count;
1556 coro_destroy (&cctx->cctx);
1557
1558 /* coro_transfer creates new, empty cctx's */
1559 if (cctx->sptr)
1560 {
1561 #if CORO_USE_VALGRIND
1562 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1563 #endif
1564
1565#if HAVE_MMAP
1566 if (cctx->flags & CC_MAPPED)
1567 munmap (cctx->sptr, cctx->ssize);
1568 else
1569#endif
1570 Safefree (cctx->sptr);
1571 }
1572
1573 Safefree (cctx);
1574}
1575
1576/* wether this cctx should be destructed */
1577#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1578
1579static coro_cctx *
1580cctx_get (pTHX)
1581{
1582 while (ecb_expect_true (cctx_first))
1583 {
1584 coro_cctx *cctx = cctx_first;
1585 cctx_first = cctx->next;
1586 --cctx_idle;
1587
1588 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
1589 return cctx;
1590
1591 cctx_destroy (cctx);
1592 }
1593
1594 return cctx_new_run ();
1595}
1596
1597static void
1598cctx_put (coro_cctx *cctx)
1599{
1600 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1601
1602 /* free another cctx if overlimit */
1603 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1604 {
1605 coro_cctx *first = cctx_first;
1606 cctx_first = first->next;
1607 --cctx_idle;
1608
1609 cctx_destroy (first);
1610 }
1611
1612 ++cctx_idle;
1613 cctx->next = cctx_first;
1614 cctx_first = cctx;
1615}
1616
1617/** coroutine switching *****************************************************/
1618
1619static void
1620transfer_check (pTHX_ struct coro *prev, struct coro *next)
1621{
1622 /* TODO: throwing up here is considered harmful */
1623
1624 if (ecb_expect_true (prev != next))
1625 {
1626 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1627 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1628
1629 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1630 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1631
1632#if !PERL_VERSION_ATLEAST (5,10,0)
1633 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1634 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1635#endif
1636 }
1637}
1638
1639/* always use the TRANSFER macro */
1640static void ecb_noinline /* noinline so we have a fixed stackframe */
1641transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1642{
1643 dSTACKLEVEL;
1644
1645 /* sometimes transfer is only called to set idle_sp */
1646 if (ecb_expect_false (!prev))
1647 {
1648 cctx_current->idle_sp = STACKLEVEL;
1649 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1650 }
1651 else if (ecb_expect_true (prev != next))
1652 {
1653 coro_cctx *cctx_prev;
1654
1655 if (ecb_expect_false (prev->flags & CF_NEW))
1656 {
1657 /* create a new empty/source context */
1658 prev->flags &= ~CF_NEW;
1659 prev->flags |= CF_RUNNING;
1660 }
1661
1662 prev->flags &= ~CF_RUNNING;
1663 next->flags |= CF_RUNNING;
1664
1665 /* first get rid of the old state */
1666 save_perl (aTHX_ prev);
1667
1668 if (ecb_expect_false (next->flags & CF_NEW))
1669 {
1670 /* need to start coroutine */
1671 next->flags &= ~CF_NEW;
1672 /* setup coroutine call */
1673 init_perl (aTHX_ next);
1674 }
1675 else
1676 load_perl (aTHX_ next);
1677
1678 /* possibly untie and reuse the cctx */
1679 if (ecb_expect_true (
1680 cctx_current->idle_sp == STACKLEVEL
1681 && !(cctx_current->flags & CC_TRACE)
1682 && !force_cctx
1683 ))
1684 {
1685 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1686 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1687
1688 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1689 /* without this the next cctx_get might destroy the running cctx while still in use */
1690 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1691 if (ecb_expect_true (!next->cctx))
1692 next->cctx = cctx_get (aTHX);
1693
1694 cctx_put (cctx_current);
1695 }
1696 else
1697 prev->cctx = cctx_current;
1698
1699 ++next->usecount;
1700
1701 cctx_prev = cctx_current;
1702 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1703
1704 next->cctx = 0;
1705
1706 if (ecb_expect_false (cctx_prev != cctx_current))
1707 {
1708 cctx_prev->top_env = PL_top_env;
1709 PL_top_env = cctx_current->top_env;
1710 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1711 }
1712
1713 transfer_tail (aTHX);
1714 }
1715}
1716
1717#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1718#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1719
1720/** high level stuff ********************************************************/
1721
1722/* this function is actually Coro, not Coro::State, but we call it from here */
1723/* because it is convenient - but it hasn't been declared yet for that reason */
1724static void
1725coro_call_on_destroy (pTHX_ struct coro *coro);
1726
1727static void
1728coro_state_destroy (pTHX_ struct coro *coro)
1729{
1730 if (coro->flags & CF_ZOMBIE)
1731 return;
1732
1733 slf_destroy (aTHX_ coro);
1734
1735 coro->flags |= CF_ZOMBIE;
1736
1737 if (coro->flags & CF_READY)
1738 {
1739 /* reduce nready, as destroying a ready coro effectively unreadies it */
1740 /* alternative: look through all ready queues and remove the coro */
1741 --coro_nready;
1742 }
1743 else
1744 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1745
1746 if (coro->next) coro->next->prev = coro->prev;
1747 if (coro->prev) coro->prev->next = coro->next;
1748 if (coro == coro_first) coro_first = coro->next;
1749
1750 if (coro->mainstack
1751 && coro->mainstack != main_mainstack
1752 && coro->slot
1753 && !PL_dirty)
1754 destroy_perl (aTHX_ coro);
1755
1756 cctx_destroy (coro->cctx);
1757 SvREFCNT_dec (coro->startcv);
1758 SvREFCNT_dec (coro->args);
1759 SvREFCNT_dec (coro->swap_sv);
1760 SvREFCNT_dec (CORO_THROW);
1761
1762 coro_call_on_destroy (aTHX_ coro);
1763
1764 /* more destruction mayhem in coro_state_free */
1765}
1766
1767static int
1768coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1769{
1770 struct coro *coro = (struct coro *)mg->mg_ptr;
1771 mg->mg_ptr = 0;
1772
1773 coro_state_destroy (aTHX_ coro);
1774 SvREFCNT_dec (coro->on_destroy);
1775 SvREFCNT_dec (coro->status);
1776
1777 Safefree (coro);
1778
1779 return 0;
1780}
1781
1782static int ecb_cold
1783coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1784{
1785 /* called when perl clones the current process the slow way (windows process emulation) */
1786 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1787 mg->mg_ptr = 0;
1788 mg->mg_virtual = 0;
1789
1790 return 0;
1791}
1792
1793static MGVTBL coro_state_vtbl = {
1794 0, 0, 0, 0,
1795 coro_state_free,
1796 0,
1797#ifdef MGf_DUP
1798 coro_state_dup,
1799#else
1800# define MGf_DUP 0
1801#endif
1802};
1803
1804static void
1805prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1806{
1807 ta->prev = SvSTATE (prev_sv);
1808 ta->next = SvSTATE (next_sv);
1809 TRANSFER_CHECK (*ta);
1810}
1811
1812static void
1813api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1814{
1815 struct coro_transfer_args ta;
1816
1817 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1818 TRANSFER (ta, 1);
1819}
1820
1821/** Coro ********************************************************************/
1822
1823ecb_inline void
1824coro_enq (pTHX_ struct coro *coro)
1825{
1826 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1827
1828 SvREFCNT_inc_NN (coro->hv);
1829
1830 coro->next_ready = 0;
1831 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1832 ready [1] = coro;
1833}
1834
1835ecb_inline struct coro *
1836coro_deq (pTHX)
1837{
1838 int prio;
1839
1840 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1841 {
1842 struct coro **ready = coro_ready [prio];
1843
1844 if (ready [0])
1845 {
1846 struct coro *coro = ready [0];
1847 ready [0] = coro->next_ready;
1848 return coro;
1849 }
1850 }
1851
1852 return 0;
1853}
1854
1855static void
1856invoke_sv_ready_hook_helper (void)
1857{
543 dTHX; 1858 dTHX;
544 dSP; 1859 dSP;
545 UNOP myop;
546 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
547 1860
548 coro_init_stacks (aTHX); 1861 ENTER;
549 /*PL_curcop = 0;*/ 1862 SAVETMPS;
550 /*PL_in_eval = PL_in_eval;*/ /* inherit */
551 SvREFCNT_dec (GvAV (PL_defgv));
552 GvAV (PL_defgv) = coro->args; coro->args = 0;
553 1863
554 SPAGAIN;
555
556 Zero (&myop, 1, UNOP);
557 myop.op_next = Nullop;
558 myop.op_flags = OPf_WANT_VOID;
559
560 PL_op = (OP *)&myop;
561
562 PUSHMARK(SP); 1864 PUSHMARK (SP);
563 XPUSHs (sub_init);
564 PUTBACK; 1865 PUTBACK;
565 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1866 call_sv (coro_readyhook, G_VOID | G_DISCARD);
566 SPAGAIN;
567 1867
568 ENTER; /* necessary e.g. for dounwind */ 1868 FREETMPS;
1869 LEAVE;
569} 1870}
570 1871
571static void 1872static int
572free_coro_mortal () 1873api_ready (pTHX_ SV *coro_sv)
573{ 1874{
574 if (coro_mortal) 1875 struct coro *coro = SvSTATE (coro_sv);
575 {
576 SvREFCNT_dec (coro_mortal);
577 coro_mortal = 0;
578 }
579}
580 1876
581static void 1877 if (coro->flags & CF_READY)
582coro_run (void *arg)
583{
584 /*
585 * this is a _very_ stripped down perl interpreter ;)
586 */
587 dTHX;
588 int ret;
589
590 UNLOCK;
591
592 PL_top_env = &PL_start_env;
593
594 sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
595 sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
596
597 /* continue at cctx_init, without entersub */
598 PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
599
600 /* somebody will hit me for both perl_run and PL_restartop */
601 ret = perl_run (aTHX_ PERL_GET_CONTEXT);
602 printf ("ret %d\n", ret);//D
603
604 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
605 abort ();
606}
607
608static coro_stack *
609stack_new ()
610{
611 coro_stack *stack;
612
613 New (0, stack, 1, coro_stack);
614
615#if HAVE_MMAP
616
617 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
618 /* mmap suppsedly does allocate-on-write for us */
619 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
620
621 if (stack->sptr == (void *)-1)
622 {
623 perror ("FATAL: unable to mmap stack for coroutine");
624 _exit (EXIT_FAILURE);
625 }
626
627# if STACKGUARD
628 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
629# endif
630
631#else
632
633 stack->ssize = STACKSIZE * (long)sizeof (long);
634 New (0, stack->sptr, STACKSIZE, long);
635
636 if (!stack->sptr)
637 {
638 perror (stderr, "FATAL: unable to malloc stack for coroutine");
639 _exit (EXIT_FAILURE);
640 }
641
642#endif
643
644 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
645
646 return stack;
647}
648
649static void
650stack_free (coro_stack *stack)
651{
652 if (!stack || stack == main_stack)
653 return; 1878 return 0;
654 1879
655#if HAVE_MMAP 1880 coro->flags |= CF_READY;
656 munmap (stack->sptr, stack->ssize);
657#else
658 Safefree (stack->sptr);
659#endif
660 1881
661 Safefree (stack); 1882 coro_enq (aTHX_ coro);
662}
663 1883
664static coro_stack *stack_first; 1884 if (!coro_nready++)
1885 if (coroapi.readyhook)
1886 coroapi.readyhook ();
665 1887
666static coro_stack * 1888 return 1;
667stack_get () 1889}
668{
669 coro_stack *stack;
670 1890
671 if (stack_first) 1891static int
672 { 1892api_is_ready (pTHX_ SV *coro_sv)
673 stack = stack_first; 1893{
674 stack_first = stack->next; 1894 return !!(SvSTATE (coro_sv)->flags & CF_READY);
675 } 1895}
676 else 1896
1897/* expects to own a reference to next->hv */
1898ecb_inline void
1899prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1900{
1901 SV *prev_sv = SvRV (coro_current);
1902
1903 ta->prev = SvSTATE_hv (prev_sv);
1904 ta->next = next;
1905
1906 TRANSFER_CHECK (*ta);
1907
1908 SvRV_set (coro_current, (SV *)next->hv);
1909
1910 free_coro_mortal (aTHX);
1911 coro_mortal = prev_sv;
1912}
1913
1914static void
1915prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1916{
1917 for (;;)
677 { 1918 {
678 stack = stack_new (); 1919 struct coro *next = coro_deq (aTHX);
679 PL_op = PL_op->op_next;
680 }
681 1920
682 return stack; 1921 if (ecb_expect_true (next))
683}
684
685static void
686stack_put (coro_stack *stack)
687{
688 stack->next = stack_first;
689 stack_first = stack;
690}
691
692/* never call directly, always through the coro_state_transfer global variable */
693static void
694transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)
695{
696 dSTACKLEVEL;
697
698 /* sometimes transfer is only called to set idle_sp */
699 if (flags == TRANSFER_SET_STACKLEVEL)
700 ((coro_stack *)prev)->idle_sp = STACKLEVEL;
701 else if (prev != next)
702 {
703 coro_stack *prev__stack;
704
705 LOCK;
706
707 if (next->mainstack)
708 { 1922 {
709 /* coroutine already started */ 1923 /* cannot transfer to destroyed coros, skip and look for next */
710 SAVE (prev, flags); 1924 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
711 LOAD (next); 1925 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1926 else
1927 {
1928 next->flags &= ~CF_READY;
1929 --coro_nready;
1930
1931 prepare_schedule_to (aTHX_ ta, next);
1932 break;
1933 }
712 } 1934 }
713 else 1935 else
714 { 1936 {
715 /* need to start coroutine */ 1937 /* nothing to schedule: call the idle handler */
716 /* first get rid of the old state */ 1938 if (SvROK (sv_idle)
717 SAVE (prev, -1); 1939 && SvOBJECT (SvRV (sv_idle)))
718 /* setup coroutine call */ 1940 {
719 setup_coro (next); 1941 if (SvRV (sv_idle) == SvRV (coro_current))
720 /* need a stack */ 1942 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
721 next->stack = 0; 1943
1944 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1945 api_ready (aTHX_ SvRV (sv_idle));
1946 --coro_nready;
1947 }
1948 else
1949 {
1950 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1951 dSP;
1952
1953 ENTER;
1954 SAVETMPS;
1955
1956 PUSHMARK (SP);
1957 PUTBACK;
1958 call_sv (sv_idle, G_VOID | G_DISCARD);
1959
1960 FREETMPS;
1961 LEAVE;
1962 }
722 } 1963 }
1964 }
1965}
723 1966
724 prev__stack = prev->stack; 1967ecb_inline void
1968prepare_cede (pTHX_ struct coro_transfer_args *ta)
1969{
1970 api_ready (aTHX_ coro_current);
1971 prepare_schedule (aTHX_ ta);
1972}
725 1973
726 /* possibly "free" the stack */ 1974ecb_inline void
727 if (prev__stack->idle_sp == STACKLEVEL) 1975prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1976{
1977 SV *prev = SvRV (coro_current);
1978
1979 if (coro_nready)
1980 {
1981 prepare_schedule (aTHX_ ta);
1982 api_ready (aTHX_ prev);
1983 }
1984 else
1985 prepare_nop (aTHX_ ta);
1986}
1987
1988static void
1989api_schedule (pTHX)
1990{
1991 struct coro_transfer_args ta;
1992
1993 prepare_schedule (aTHX_ &ta);
1994 TRANSFER (ta, 1);
1995}
1996
1997static void
1998api_schedule_to (pTHX_ SV *coro_sv)
1999{
2000 struct coro_transfer_args ta;
2001 struct coro *next = SvSTATE (coro_sv);
2002
2003 SvREFCNT_inc_NN (coro_sv);
2004 prepare_schedule_to (aTHX_ &ta, next);
2005}
2006
2007static int
2008api_cede (pTHX)
2009{
2010 struct coro_transfer_args ta;
2011
2012 prepare_cede (aTHX_ &ta);
2013
2014 if (ecb_expect_true (ta.prev != ta.next))
2015 {
2016 TRANSFER (ta, 1);
2017 return 1;
2018 }
2019 else
2020 return 0;
2021}
2022
2023static int
2024api_cede_notself (pTHX)
2025{
2026 if (coro_nready)
2027 {
2028 struct coro_transfer_args ta;
2029
2030 prepare_cede_notself (aTHX_ &ta);
2031 TRANSFER (ta, 1);
2032 return 1;
2033 }
2034 else
2035 return 0;
2036}
2037
2038static void
2039api_trace (pTHX_ SV *coro_sv, int flags)
2040{
2041 struct coro *coro = SvSTATE (coro_sv);
2042
2043 if (coro->flags & CF_RUNNING)
2044 croak ("cannot enable tracing on a running coroutine, caught");
2045
2046 if (flags & CC_TRACE)
2047 {
2048 if (!coro->cctx)
2049 coro->cctx = cctx_new_run ();
2050 else if (!(coro->cctx->flags & CC_TRACE))
2051 croak ("cannot enable tracing on coroutine with custom stack, caught");
2052
2053 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2054 }
2055 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2056 {
2057 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2058
2059 if (coro->flags & CF_RUNNING)
2060 PL_runops = RUNOPS_DEFAULT;
2061 else
2062 coro->slot->runops = RUNOPS_DEFAULT;
2063 }
2064}
2065
2066static void
2067coro_push_av (pTHX_ AV *av, I32 gimme_v)
2068{
2069 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2070 {
2071 dSP;
2072
2073 if (gimme_v == G_SCALAR)
2074 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2075 else
728 { 2076 {
729 stack_put (prev__stack); 2077 int i;
730 prev->stack = 0; 2078 EXTEND (SP, AvFILLp (av) + 1);
2079
2080 for (i = 0; i <= AvFILLp (av); ++i)
2081 PUSHs (AvARRAY (av)[i]);
731 } 2082 }
732 2083
733 if (!next->stack) 2084 PUTBACK;
734 next->stack = stack_get (); 2085 }
2086}
735 2087
736 if (prev__stack != next->stack) 2088static void
2089coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2090{
2091 if (!coro->on_destroy)
2092 coro->on_destroy = newAV ();
2093
2094 av_push (coro->on_destroy, cb);
2095}
2096
2097static void
2098slf_destroy_join (pTHX_ struct CoroSLF *frame)
2099{
2100 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2101}
2102
2103static int
2104slf_check_join (pTHX_ struct CoroSLF *frame)
2105{
2106 struct coro *coro = (struct coro *)frame->data;
2107
2108 if (!coro->status)
2109 return 1;
2110
2111 frame->destroy = 0;
2112
2113 coro_push_av (aTHX_ coro->status, GIMME_V);
2114
2115 SvREFCNT_dec ((SV *)coro->hv);
2116
2117 return 0;
2118}
2119
2120static void
2121slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2122{
2123 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2124
2125 if (items > 1)
2126 croak ("join called with too many arguments");
2127
2128 if (coro->status)
2129 frame->prepare = prepare_nop;
2130 else
2131 {
2132 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2133 frame->prepare = prepare_schedule;
2134 }
2135
2136 frame->check = slf_check_join;
2137 frame->destroy = slf_destroy_join;
2138 frame->data = (void *)coro;
2139 SvREFCNT_inc (coro->hv);
2140}
2141
2142static void
2143coro_call_on_destroy (pTHX_ struct coro *coro)
2144{
2145 AV *od = coro->on_destroy;
2146
2147 if (!od)
2148 return;
2149
2150 while (AvFILLp (od) >= 0)
2151 {
2152 SV *cb = sv_2mortal (av_pop (od));
2153
2154 /* coro hv's (and only hv's at the moment) are supported as well */
2155 if (SvSTATEhv_p (aTHX_ cb))
2156 api_ready (aTHX_ cb);
2157 else
737 { 2158 {
738 prev__stack->top_env = PL_top_env; 2159 dSP; /* don't disturb outer sp */
739 PL_top_env = next->stack->top_env; 2160 PUSHMARK (SP);
740 printf ("stacksw %p %p\n", prev__stack->idle_sp, next->stack->idle_sp);//D 2161
741 coro_transfer (&prev__stack->cctx, &next->stack->cctx); 2162 if (coro->status)
2163 {
2164 PUTBACK;
2165 coro_push_av (aTHX_ coro->status, G_ARRAY);
2166 SPAGAIN;
2167 }
2168
2169 PUTBACK;
2170 call_sv (cb, G_VOID | G_DISCARD);
742 } 2171 }
743
744 free_coro_mortal ();
745
746 UNLOCK;
747 }
748}
749
750/* use this function pointer to call the above function */
751/* this is done to increase chances of the compiler not inlining the call */
752/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
753void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
754
755struct transfer_args
756{
757 struct coro *prev, *next;
758 int flags;
759};
760
761#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
762
763static void
764coro_state_destroy (struct coro *coro)
765{
766 if (coro->refcnt--)
767 return;
768
769 if (coro->mainstack && coro->mainstack != main_mainstack)
770 { 2172 }
771 struct coro temp; 2173}
772 2174
773 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL); 2175static void
774 LOAD (aTHX_ coro); 2176coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
775 2177{
776 destroy_stacks (aTHX); 2178 AV *av;
777 2179
778 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 2180 if (coro->status)
779
780 coro->mainstack = 0;
781 } 2181 {
2182 av = coro->status;
2183 av_clear (av);
2184 }
2185 else
2186 av = coro->status = newAV ();
782 2187
783 stack_free (coro->stack); 2188 /* items are actually not so common, so optimise for this case */
784 SvREFCNT_dec (coro->args); 2189 if (items)
785 Safefree (coro); 2190 {
2191 int i;
2192
2193 av_extend (av, items - 1);
2194
2195 for (i = 0; i < items; ++i)
2196 av_push (av, SvREFCNT_inc_NN (arg [i]));
2197 }
2198}
2199
2200static void
2201slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2202{
2203 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2204 api_ready (aTHX_ sv_manager);
2205
2206 frame->prepare = prepare_schedule;
2207 frame->check = slf_check_repeat;
2208
2209 /* as a minor optimisation, we could unwind all stacks here */
2210 /* but that puts extra pressure on pp_slf, and is not worth much */
2211 /*coro_unwind_stacks (aTHX);*/
2212}
2213
2214static void
2215slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2216{
2217 HV *coro_hv = (HV *)SvRV (coro_current);
2218
2219 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2220 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2221}
2222
2223static void
2224slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2225{
2226 HV *coro_hv;
2227 struct coro *coro;
2228
2229 if (items <= 0)
2230 croak ("Coro::cancel called without coro object,");
2231
2232 coro = SvSTATE (arg [0]);
2233 coro_hv = coro->hv;
2234
2235 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2236
2237 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2238 {
2239 /* coro currently busy cancelling something, so just notify it */
2240 coro->slf_frame.data = (void *)coro;
2241
2242 frame->prepare = prepare_nop;
2243 frame->check = slf_check_nop;
2244 }
2245 else if (coro_hv == (HV *)SvRV (coro_current))
2246 {
2247 /* cancelling the current coro is allowed, and equals terminate */
2248 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2249 }
2250 else
2251 {
2252 struct coro *self = SvSTATE_current;
2253
2254 /* otherwise we cancel directly, purely for speed reasons
2255 * unfortunately, this requires some magic trickery, as
2256 * somebody else could cancel us, so we have to fight the cancellation.
2257 * this is ugly, and hopefully fully worth the extra speed.
2258 * besides, I can't get the slow-but-safe version working...
2259 */
2260 slf_frame.data = 0;
2261 self->flags |= CF_NOCANCEL;
2262 coro_state_destroy (aTHX_ coro);
2263 self->flags &= ~CF_NOCANCEL;
2264
2265 if (slf_frame.data)
2266 {
2267 /* while we were busy we have been cancelled, so terminate */
2268 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2269 }
2270 else
2271 {
2272 frame->prepare = prepare_nop;
2273 frame->check = slf_check_nop;
2274 }
2275 }
786} 2276}
787 2277
788static int 2278static int
789coro_state_clear (SV *sv, MAGIC *mg) 2279slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
790{ 2280{
791 struct coro *coro = (struct coro *)mg->mg_ptr; 2281 frame->prepare = 0;
792 mg->mg_ptr = 0; 2282 coro_unwind_stacks (aTHX);
793 2283
794 coro_state_destroy (coro); 2284 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
795 2285
796 return 0; 2286 return 1;
797} 2287}
798 2288
799static int 2289static int
800coro_state_dup (MAGIC *mg, CLONE_PARAMS *params) 2290safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
801{ 2291{
802 struct coro *coro = (struct coro *)mg->mg_ptr; 2292 if (coro->cctx)
2293 croak ("coro inside C callback, unable to cancel at this time, caught");
803 2294
804 ++coro->refcnt; 2295 if (coro->flags & CF_NEW)
2296 {
2297 coro_set_status (aTHX_ coro, arg, items);
2298 coro_state_destroy (aTHX_ coro);
2299 }
2300 else
2301 {
2302 if (!coro->slf_frame.prepare)
2303 croak ("coro outside an SLF function, unable to cancel at this time, caught");
805 2304
2305 slf_destroy (aTHX_ coro);
2306
2307 coro_set_status (aTHX_ coro, arg, items);
2308 coro->slf_frame.prepare = prepare_nop;
2309 coro->slf_frame.check = slf_check_safe_cancel;
2310
2311 api_ready (aTHX_ (SV *)coro->hv);
2312 }
2313
806 return 0; 2314 return 1;
807} 2315}
808 2316
809static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };
810
811static struct coro *
812SvSTATE (SV *coro)
813{
814 HV *stash;
815 MAGIC *mg;
816
817 if (SvROK (coro))
818 coro = SvRV (coro);
819
820 stash = SvSTASH (coro);
821 if (stash != coro_stash && stash != coro_state_stash)
822 {
823 /* very slow, but rare, check */
824 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
825 croak ("Coro::State object required");
826 }
827
828 mg = SvMAGIC (coro);
829 assert (mg->mg_type == PERL_MAGIC_ext);
830 return (struct coro *)mg->mg_ptr;
831}
832
833static void
834prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)
835{
836 ta->prev = SvSTATE (prev);
837 ta->next = SvSTATE (next);
838 ta->flags = flags;
839}
840
841static void
842api_transfer (SV *prev, SV *next, int flags)
843{
844 dTHX;
845 struct transfer_args ta;
846
847 prepare_transfer (aTHX_ &ta, prev, next, flags);
848 TRANSFER (ta);
849}
850
851/** Coro ********************************************************************/ 2317/*****************************************************************************/
2318/* async pool handler */
852 2319
853#define PRIO_MAX 3
854#define PRIO_HIGH 1
855#define PRIO_NORMAL 0
856#define PRIO_LOW -1
857#define PRIO_IDLE -3
858#define PRIO_MIN -4
859
860/* for Coro.pm */
861static GV *coro_current, *coro_idle;
862static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
863static int coro_nready;
864
865static void 2320static int
866coro_enq (pTHX_ SV *sv) 2321slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
867{ 2322{
868 int prio; 2323 HV *hv = (HV *)SvRV (coro_current);
2324 struct coro *coro = (struct coro *)frame->data;
869 2325
870 if (SvTYPE (sv) != SVt_PVHV) 2326 if (!coro->invoke_cb)
871 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 2327 return 1; /* loop till we have invoke */
872 2328 else
873 prio = SvSTATE (sv)->prio;
874
875 av_push (coro_ready [prio - PRIO_MIN], sv);
876 coro_nready++;
877}
878
879static SV *
880coro_deq (pTHX_ int min_prio)
881{
882 int prio = PRIO_MAX - PRIO_MIN;
883
884 min_prio -= PRIO_MIN;
885 if (min_prio < 0)
886 min_prio = 0;
887
888 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
889 if (AvFILLp (coro_ready [prio]) >= 0)
890 { 2329 {
891 coro_nready--; 2330 hv_store (hv, "desc", sizeof ("desc") - 1,
892 return av_shift (coro_ready [prio]); 2331 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
893 }
894 2332
895 return 0; 2333 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
896}
897
898static void
899api_ready (SV *coro)
900{
901 dTHX;
902
903 if (SvROK (coro))
904 coro = SvRV (coro);
905
906 LOCK;
907 coro_enq (aTHX_ SvREFCNT_inc (coro));
908 UNLOCK;
909}
910
911static void
912prepare_schedule (aTHX_ struct transfer_args *ta)
913{
914 SV *current, *prev, *next;
915
916 LOCK;
917
918 current = GvSV (coro_current);
919
920 for (;;)
921 {
922 LOCK;
923
924 next = coro_deq (aTHX_ PRIO_MIN);
925
926 if (next)
927 break;
928
929 UNLOCK;
930 2334
931 { 2335 {
932 dSP; 2336 dSP;
933 2337 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
934 ENTER;
935 SAVETMPS;
936
937 PUSHMARK (SP);
938 PUTBACK; 2338 PUTBACK;
939 call_sv (GvSV (coro_idle), G_DISCARD);
940
941 FREETMPS;
942 LEAVE;
943 } 2339 }
2340
2341 SvREFCNT_dec (GvAV (PL_defgv));
2342 GvAV (PL_defgv) = coro->invoke_av;
2343 coro->invoke_av = 0;
2344
2345 return 0;
2346 }
2347}
2348
2349static void
2350slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2351{
2352 HV *hv = (HV *)SvRV (coro_current);
2353 struct coro *coro = SvSTATE_hv ((SV *)hv);
2354
2355 if (ecb_expect_true (coro->saved_deffh))
944 } 2356 {
2357 /* subsequent iteration */
2358 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2359 coro->saved_deffh = 0;
945 2360
946 prev = SvRV (current); 2361 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
947 SvRV (current) = next; 2362 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2363 {
2364 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2365 return;
2366 }
2367 else
2368 {
2369 av_clear (GvAV (PL_defgv));
2370 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
948 2371
949 /* free this only after the transfer */ 2372 coro->prio = 0;
950 free_coro_mortal ();
951 coro_mortal = prev;
952 2373
953 ta->prev = SvSTATE (prev); 2374 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
954 ta->next = SvSTATE (next); 2375 api_trace (aTHX_ coro_current, 0);
955 ta->flags = TRANSFER_SAVE_ALL;
956 2376
957 UNLOCK; 2377 frame->prepare = prepare_schedule;
958} 2378 av_push (av_async_pool, SvREFCNT_inc (hv));
2379 }
2380 }
2381 else
2382 {
2383 /* first iteration, simply fall through */
2384 frame->prepare = prepare_nop;
2385 }
959 2386
2387 frame->check = slf_check_pool_handler;
2388 frame->data = (void *)coro;
2389}
2390
2391/*****************************************************************************/
2392/* rouse callback */
2393
2394#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2395
2396static void
2397coro_rouse_callback (pTHX_ CV *cv)
2398{
2399 dXSARGS;
2400 SV *data = (SV *)S_GENSUB_ARG;
2401
2402 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2403 {
2404 /* first call, set args */
2405 SV *coro = SvRV (data);
2406 AV *av = newAV ();
2407
2408 SvRV_set (data, (SV *)av);
2409
2410 /* better take a full copy of the arguments */
2411 while (items--)
2412 av_store (av, items, newSVsv (ST (items)));
2413
2414 api_ready (aTHX_ coro);
2415 SvREFCNT_dec (coro);
2416 }
2417
2418 XSRETURN_EMPTY;
2419}
2420
960static void 2421static int
2422slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2423{
2424 SV *data = (SV *)frame->data;
2425
2426 if (CORO_THROW)
2427 return 0;
2428
2429 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2430 return 1;
2431
2432 /* now push all results on the stack */
2433 {
2434 dSP;
2435 AV *av = (AV *)SvRV (data);
2436 int i;
2437
2438 EXTEND (SP, AvFILLp (av) + 1);
2439 for (i = 0; i <= AvFILLp (av); ++i)
2440 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2441
2442 /* we have stolen the elements, so set length to zero and free */
2443 AvFILLp (av) = -1;
2444 av_undef (av);
2445
2446 PUTBACK;
2447 }
2448
2449 return 0;
2450}
2451
2452static void
2453slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2454{
2455 SV *cb;
2456
2457 if (items)
2458 cb = arg [0];
2459 else
2460 {
2461 struct coro *coro = SvSTATE_current;
2462
2463 if (!coro->rouse_cb)
2464 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2465
2466 cb = sv_2mortal (coro->rouse_cb);
2467 coro->rouse_cb = 0;
2468 }
2469
2470 if (!SvROK (cb)
2471 || SvTYPE (SvRV (cb)) != SVt_PVCV
2472 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2473 croak ("Coro::rouse_wait called with illegal callback argument,");
2474
2475 {
2476 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2477 SV *data = (SV *)S_GENSUB_ARG;
2478
2479 frame->data = (void *)data;
2480 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2481 frame->check = slf_check_rouse_wait;
2482 }
2483}
2484
2485static SV *
2486coro_new_rouse_cb (pTHX)
2487{
2488 HV *hv = (HV *)SvRV (coro_current);
2489 struct coro *coro = SvSTATE_hv (hv);
2490 SV *data = newRV_inc ((SV *)hv);
2491 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2492
2493 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2494 SvREFCNT_dec (data); /* magicext increases the refcount */
2495
2496 SvREFCNT_dec (coro->rouse_cb);
2497 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2498
2499 return cb;
2500}
2501
2502/*****************************************************************************/
2503/* schedule-like-function opcode (SLF) */
2504
2505static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2506static const CV *slf_cv;
2507static SV **slf_argv;
2508static int slf_argc, slf_arga; /* count, allocated */
2509static I32 slf_ax; /* top of stack, for restore */
2510
2511/* this restores the stack in the case we patched the entersub, to */
2512/* recreate the stack frame as perl will on following calls */
2513/* since entersub cleared the stack */
2514static OP *
2515pp_restore (pTHX)
2516{
2517 int i;
2518 SV **SP = PL_stack_base + slf_ax;
2519
2520 PUSHMARK (SP);
2521
2522 EXTEND (SP, slf_argc + 1);
2523
2524 for (i = 0; i < slf_argc; ++i)
2525 PUSHs (sv_2mortal (slf_argv [i]));
2526
2527 PUSHs ((SV *)CvGV (slf_cv));
2528
2529 RETURNOP (slf_restore.op_first);
2530}
2531
2532static void
2533slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2534{
2535 SV **arg = (SV **)slf_frame.data;
2536
2537 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2538}
2539
2540static void
2541slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2542{
2543 if (items != 2)
2544 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2545
2546 frame->prepare = slf_prepare_transfer;
2547 frame->check = slf_check_nop;
2548 frame->data = (void *)arg; /* let's hope it will stay valid */
2549}
2550
2551static void
2552slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2553{
2554 frame->prepare = prepare_schedule;
2555 frame->check = slf_check_nop;
2556}
2557
2558static void
961prepare_cede (aTHX_ struct transfer_args *ta) 2559slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
962{ 2560{
963 LOCK; 2561 struct coro *next = (struct coro *)slf_frame.data;
964 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
965 UNLOCK;
966 2562
2563 SvREFCNT_inc_NN (next->hv);
967 prepare_schedule (ta); 2564 prepare_schedule_to (aTHX_ ta, next);
968} 2565}
969 2566
970static void 2567static void
971api_schedule (void) 2568slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
972{ 2569{
973 dTHX; 2570 if (!items)
2571 croak ("Coro::schedule_to expects a coroutine argument, caught");
2572
2573 frame->data = (void *)SvSTATE (arg [0]);
2574 frame->prepare = slf_prepare_schedule_to;
2575 frame->check = slf_check_nop;
2576}
2577
2578static void
2579slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2580{
2581 api_ready (aTHX_ SvRV (coro_current));
2582
2583 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2584}
2585
2586static void
2587slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2588{
2589 frame->prepare = prepare_cede;
2590 frame->check = slf_check_nop;
2591}
2592
2593static void
2594slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2595{
2596 frame->prepare = prepare_cede_notself;
2597 frame->check = slf_check_nop;
2598}
2599
2600/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2601static void
2602slf_destroy (pTHX_ struct coro *coro)
2603{
2604 /* this callback is reserved for slf functions needing to do cleanup */
2605 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2606 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2607
2608 /*
2609 * The on_destroy above most likely is from an SLF call.
2610 * Since by definition the SLF call will not finish when we destroy
2611 * the coro, we will have to force-finish it here, otherwise
2612 * cleanup functions cannot call SLF functions.
2613 */
2614 coro->slf_frame.prepare = 0;
2615}
2616
2617/*
2618 * these not obviously related functions are all rolled into one
2619 * function to increase chances that they all will call transfer with the same
2620 * stack offset
2621 * SLF stands for "schedule-like-function".
2622 */
2623static OP *
2624pp_slf (pTHX)
2625{
2626 I32 checkmark; /* mark SP to see how many elements check has pushed */
2627
2628 /* set up the slf frame, unless it has already been set-up */
2629 /* the latter happens when a new coro has been started */
2630 /* or when a new cctx was attached to an existing coroutine */
2631 if (ecb_expect_true (!slf_frame.prepare))
2632 {
2633 /* first iteration */
2634 dSP;
2635 SV **arg = PL_stack_base + TOPMARK + 1;
2636 int items = SP - arg; /* args without function object */
2637 SV *gv = *sp;
2638
2639 /* do a quick consistency check on the "function" object, and if it isn't */
2640 /* for us, divert to the real entersub */
2641 if (SvTYPE (gv) != SVt_PVGV
2642 || !GvCV (gv)
2643 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2644 return PL_ppaddr[OP_ENTERSUB](aTHX);
2645
2646 if (!(PL_op->op_flags & OPf_STACKED))
2647 {
2648 /* ampersand-form of call, use @_ instead of stack */
2649 AV *av = GvAV (PL_defgv);
2650 arg = AvARRAY (av);
2651 items = AvFILLp (av) + 1;
2652 }
2653
2654 /* now call the init function, which needs to set up slf_frame */
2655 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2656 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2657
2658 /* pop args */
2659 SP = PL_stack_base + POPMARK;
2660
2661 PUTBACK;
2662 }
2663
2664 /* now that we have a slf_frame, interpret it! */
2665 /* we use a callback system not to make the code needlessly */
2666 /* complicated, but so we can run multiple perl coros from one cctx */
2667
2668 do
2669 {
974 struct transfer_args ta; 2670 struct coro_transfer_args ta;
975 2671
976 prepare_schedule (&ta); 2672 slf_frame.prepare (aTHX_ &ta);
977 TRANSFER (ta); 2673 TRANSFER (ta, 0);
978}
979 2674
2675 checkmark = PL_stack_sp - PL_stack_base;
2676 }
2677 while (slf_frame.check (aTHX_ &slf_frame));
2678
2679 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2680
2681 /* exception handling */
2682 if (ecb_expect_false (CORO_THROW))
2683 {
2684 SV *exception = sv_2mortal (CORO_THROW);
2685
2686 CORO_THROW = 0;
2687 sv_setsv (ERRSV, exception);
2688 croak (0);
2689 }
2690
2691 /* return value handling - mostly like entersub */
2692 /* make sure we put something on the stack in scalar context */
2693 if (GIMME_V == G_SCALAR
2694 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2695 {
2696 dSP;
2697 SV **bot = PL_stack_base + checkmark;
2698
2699 if (sp == bot) /* too few, push undef */
2700 bot [1] = &PL_sv_undef;
2701 else /* too many, take last one */
2702 bot [1] = *sp;
2703
2704 SP = bot + 1;
2705
2706 PUTBACK;
2707 }
2708
2709 return NORMAL;
2710}
2711
2712static void
2713api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2714{
2715 int i;
2716 SV **arg = PL_stack_base + ax;
2717 int items = PL_stack_sp - arg + 1;
2718
2719 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2720
2721 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2722 && PL_op->op_ppaddr != pp_slf)
2723 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2724
2725 CvFLAGS (cv) |= CVf_SLF;
2726 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2727 slf_cv = cv;
2728
2729 /* we patch the op, and then re-run the whole call */
2730 /* we have to put the same argument on the stack for this to work */
2731 /* and this will be done by pp_restore */
2732 slf_restore.op_next = (OP *)&slf_restore;
2733 slf_restore.op_type = OP_CUSTOM;
2734 slf_restore.op_ppaddr = pp_restore;
2735 slf_restore.op_first = PL_op;
2736
2737 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2738
2739 if (PL_op->op_flags & OPf_STACKED)
2740 {
2741 if (items > slf_arga)
2742 {
2743 slf_arga = items;
2744 Safefree (slf_argv);
2745 New (0, slf_argv, slf_arga, SV *);
2746 }
2747
2748 slf_argc = items;
2749
2750 for (i = 0; i < items; ++i)
2751 slf_argv [i] = SvREFCNT_inc (arg [i]);
2752 }
2753 else
2754 slf_argc = 0;
2755
2756 PL_op->op_ppaddr = pp_slf;
2757 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2758
2759 PL_op = (OP *)&slf_restore;
2760}
2761
2762/*****************************************************************************/
2763/* dynamic wind */
2764
2765static void
2766on_enterleave_call (pTHX_ SV *cb)
2767{
2768 dSP;
2769
2770 PUSHSTACK;
2771
2772 PUSHMARK (SP);
2773 PUTBACK;
2774 call_sv (cb, G_VOID | G_DISCARD);
2775 SPAGAIN;
2776
2777 POPSTACK;
2778}
2779
2780static SV *
2781coro_avp_pop_and_free (pTHX_ AV **avp)
2782{
2783 AV *av = *avp;
2784 SV *res = av_pop (av);
2785
2786 if (AvFILLp (av) < 0)
2787 {
2788 *avp = 0;
2789 SvREFCNT_dec (av);
2790 }
2791
2792 return res;
2793}
2794
2795static void
2796coro_pop_on_enter (pTHX_ void *coro)
2797{
2798 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2799 SvREFCNT_dec (cb);
2800}
2801
2802static void
2803coro_pop_on_leave (pTHX_ void *coro)
2804{
2805 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2806 on_enterleave_call (aTHX_ sv_2mortal (cb));
2807}
2808
2809/*****************************************************************************/
2810/* PerlIO::cede */
2811
2812typedef struct
2813{
2814 PerlIOBuf base;
2815 NV next, every;
2816} PerlIOCede;
2817
2818static IV ecb_cold
2819PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2820{
2821 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2822
2823 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2824 self->next = nvtime () + self->every;
2825
2826 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2827}
2828
2829static SV * ecb_cold
2830PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2831{
2832 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2833
2834 return newSVnv (self->every);
2835}
2836
2837static IV
2838PerlIOCede_flush (pTHX_ PerlIO *f)
2839{
2840 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2841 double now = nvtime ();
2842
2843 if (now >= self->next)
2844 {
2845 api_cede (aTHX);
2846 self->next = now + self->every;
2847 }
2848
2849 return PerlIOBuf_flush (aTHX_ f);
2850}
2851
2852static PerlIO_funcs PerlIO_cede =
2853{
2854 sizeof(PerlIO_funcs),
2855 "cede",
2856 sizeof(PerlIOCede),
2857 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2858 PerlIOCede_pushed,
2859 PerlIOBuf_popped,
2860 PerlIOBuf_open,
2861 PerlIOBase_binmode,
2862 PerlIOCede_getarg,
2863 PerlIOBase_fileno,
2864 PerlIOBuf_dup,
2865 PerlIOBuf_read,
2866 PerlIOBuf_unread,
2867 PerlIOBuf_write,
2868 PerlIOBuf_seek,
2869 PerlIOBuf_tell,
2870 PerlIOBuf_close,
2871 PerlIOCede_flush,
2872 PerlIOBuf_fill,
2873 PerlIOBase_eof,
2874 PerlIOBase_error,
2875 PerlIOBase_clearerr,
2876 PerlIOBase_setlinebuf,
2877 PerlIOBuf_get_base,
2878 PerlIOBuf_bufsiz,
2879 PerlIOBuf_get_ptr,
2880 PerlIOBuf_get_cnt,
2881 PerlIOBuf_set_ptrcnt,
2882};
2883
2884/*****************************************************************************/
2885/* Coro::Semaphore & Coro::Signal */
2886
2887static SV *
2888coro_waitarray_new (pTHX_ int count)
2889{
2890 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2891 AV *av = newAV ();
2892 SV **ary;
2893
2894 /* unfortunately, building manually saves memory */
2895 Newx (ary, 2, SV *);
2896 AvALLOC (av) = ary;
2897#if PERL_VERSION_ATLEAST (5,10,0)
2898 AvARRAY (av) = ary;
2899#else
2900 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2901 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2902 SvPVX ((SV *)av) = (char *)ary;
2903#endif
2904 AvMAX (av) = 1;
2905 AvFILLp (av) = 0;
2906 ary [0] = newSViv (count);
2907
2908 return newRV_noinc ((SV *)av);
2909}
2910
2911/* semaphore */
2912
2913static void
2914coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2915{
2916 SV *count_sv = AvARRAY (av)[0];
2917 IV count = SvIVX (count_sv);
2918
2919 count += adjust;
2920 SvIVX (count_sv) = count;
2921
2922 /* now wake up as many waiters as are expected to lock */
2923 while (count > 0 && AvFILLp (av) > 0)
2924 {
2925 SV *cb;
2926
2927 /* swap first two elements so we can shift a waiter */
2928 AvARRAY (av)[0] = AvARRAY (av)[1];
2929 AvARRAY (av)[1] = count_sv;
2930 cb = av_shift (av);
2931
2932 if (SvOBJECT (cb))
2933 {
2934 api_ready (aTHX_ cb);
2935 --count;
2936 }
2937 else if (SvTYPE (cb) == SVt_PVCV)
2938 {
2939 dSP;
2940 PUSHMARK (SP);
2941 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2942 PUTBACK;
2943 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2944 }
2945
2946 SvREFCNT_dec (cb);
2947 }
2948}
2949
2950static void
2951coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2952{
2953 /* call $sem->adjust (0) to possibly wake up some other waiters */
2954 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2955}
2956
980static void 2957static int
981api_cede (void) 2958slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
982{ 2959{
983 dTHX; 2960 AV *av = (AV *)frame->data;
984 struct transfer_args ta; 2961 SV *count_sv = AvARRAY (av)[0];
2962 SV *coro_hv = SvRV (coro_current);
985 2963
986 prepare_cede (&ta); 2964 /* if we are about to throw, don't actually acquire the lock, just throw */
987 TRANSFER (ta); 2965 if (CORO_THROW)
988} 2966 return 0;
2967 else if (SvIVX (count_sv) > 0)
2968 {
2969 frame->destroy = 0;
989 2970
2971 if (acquire)
2972 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2973 else
2974 coro_semaphore_adjust (aTHX_ av, 0);
2975
2976 return 0;
2977 }
2978 else
2979 {
2980 int i;
2981 /* if we were woken up but can't down, we look through the whole */
2982 /* waiters list and only add us if we aren't in there already */
2983 /* this avoids some degenerate memory usage cases */
2984 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
2985 if (AvARRAY (av)[i] == coro_hv)
2986 return 1;
2987
2988 av_push (av, SvREFCNT_inc (coro_hv));
2989 return 1;
2990 }
2991}
2992
2993static int
2994slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2995{
2996 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2997}
2998
2999static int
3000slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
3001{
3002 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3003}
3004
3005static void
3006slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3007{
3008 AV *av = (AV *)SvRV (arg [0]);
3009
3010 if (SvIVX (AvARRAY (av)[0]) > 0)
3011 {
3012 frame->data = (void *)av;
3013 frame->prepare = prepare_nop;
3014 }
3015 else
3016 {
3017 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3018
3019 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3020 frame->prepare = prepare_schedule;
3021 /* to avoid race conditions when a woken-up coro gets terminated */
3022 /* we arrange for a temporary on_destroy that calls adjust (0) */
3023 frame->destroy = coro_semaphore_destroy;
3024 }
3025}
3026
3027static void
3028slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3029{
3030 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3031 frame->check = slf_check_semaphore_down;
3032}
3033
3034static void
3035slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3036{
3037 if (items >= 2)
3038 {
3039 /* callback form */
3040 AV *av = (AV *)SvRV (arg [0]);
3041 SV *cb_cv = s_get_cv_croak (arg [1]);
3042
3043 av_push (av, SvREFCNT_inc_NN (cb_cv));
3044
3045 if (SvIVX (AvARRAY (av)[0]) > 0)
3046 coro_semaphore_adjust (aTHX_ av, 0);
3047
3048 frame->prepare = prepare_nop;
3049 frame->check = slf_check_nop;
3050 }
3051 else
3052 {
3053 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3054 frame->check = slf_check_semaphore_wait;
3055 }
3056}
3057
3058/* signal */
3059
3060static void
3061coro_signal_wake (pTHX_ AV *av, int count)
3062{
3063 SvIVX (AvARRAY (av)[0]) = 0;
3064
3065 /* now signal count waiters */
3066 while (count > 0 && AvFILLp (av) > 0)
3067 {
3068 SV *cb;
3069
3070 /* swap first two elements so we can shift a waiter */
3071 cb = AvARRAY (av)[0];
3072 AvARRAY (av)[0] = AvARRAY (av)[1];
3073 AvARRAY (av)[1] = cb;
3074
3075 cb = av_shift (av);
3076
3077 if (SvTYPE (cb) == SVt_PVCV)
3078 {
3079 dSP;
3080 PUSHMARK (SP);
3081 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3082 PUTBACK;
3083 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3084 }
3085 else
3086 {
3087 api_ready (aTHX_ cb);
3088 sv_setiv (cb, 0); /* signal waiter */
3089 }
3090
3091 SvREFCNT_dec (cb);
3092
3093 --count;
3094 }
3095}
3096
3097static int
3098slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3099{
3100 /* if we are about to throw, also stop waiting */
3101 return SvROK ((SV *)frame->data) && !CORO_THROW;
3102}
3103
3104static void
3105slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3106{
3107 AV *av = (AV *)SvRV (arg [0]);
3108
3109 if (items >= 2)
3110 {
3111 SV *cb_cv = s_get_cv_croak (arg [1]);
3112 av_push (av, SvREFCNT_inc_NN (cb_cv));
3113
3114 if (SvIVX (AvARRAY (av)[0]))
3115 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3116
3117 frame->prepare = prepare_nop;
3118 frame->check = slf_check_nop;
3119 }
3120 else if (SvIVX (AvARRAY (av)[0]))
3121 {
3122 SvIVX (AvARRAY (av)[0]) = 0;
3123 frame->prepare = prepare_nop;
3124 frame->check = slf_check_nop;
3125 }
3126 else
3127 {
3128 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3129
3130 av_push (av, waiter);
3131
3132 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3133 frame->prepare = prepare_schedule;
3134 frame->check = slf_check_signal_wait;
3135 }
3136}
3137
3138/*****************************************************************************/
3139/* Coro::AIO */
3140
3141#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3142
3143/* helper storage struct */
3144struct io_state
3145{
3146 int errorno;
3147 I32 laststype; /* U16 in 5.10.0 */
3148 int laststatval;
3149 Stat_t statcache;
3150};
3151
3152static void
3153coro_aio_callback (pTHX_ CV *cv)
3154{
3155 dXSARGS;
3156 AV *state = (AV *)S_GENSUB_ARG;
3157 SV *coro = av_pop (state);
3158 SV *data_sv = newSV (sizeof (struct io_state));
3159
3160 av_extend (state, items - 1);
3161
3162 sv_upgrade (data_sv, SVt_PV);
3163 SvCUR_set (data_sv, sizeof (struct io_state));
3164 SvPOK_only (data_sv);
3165
3166 {
3167 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3168
3169 data->errorno = errno;
3170 data->laststype = PL_laststype;
3171 data->laststatval = PL_laststatval;
3172 data->statcache = PL_statcache;
3173 }
3174
3175 /* now build the result vector out of all the parameters and the data_sv */
3176 {
3177 int i;
3178
3179 for (i = 0; i < items; ++i)
3180 av_push (state, SvREFCNT_inc_NN (ST (i)));
3181 }
3182
3183 av_push (state, data_sv);
3184
3185 api_ready (aTHX_ coro);
3186 SvREFCNT_dec (coro);
3187 SvREFCNT_dec ((AV *)state);
3188}
3189
3190static int
3191slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3192{
3193 AV *state = (AV *)frame->data;
3194
3195 /* if we are about to throw, return early */
3196 /* this does not cancel the aio request, but at least */
3197 /* it quickly returns */
3198 if (CORO_THROW)
3199 return 0;
3200
3201 /* one element that is an RV? repeat! */
3202 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3203 return 1;
3204
3205 /* restore status */
3206 {
3207 SV *data_sv = av_pop (state);
3208 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3209
3210 errno = data->errorno;
3211 PL_laststype = data->laststype;
3212 PL_laststatval = data->laststatval;
3213 PL_statcache = data->statcache;
3214
3215 SvREFCNT_dec (data_sv);
3216 }
3217
3218 /* push result values */
3219 {
3220 dSP;
3221 int i;
3222
3223 EXTEND (SP, AvFILLp (state) + 1);
3224 for (i = 0; i <= AvFILLp (state); ++i)
3225 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3226
3227 PUTBACK;
3228 }
3229
3230 return 0;
3231}
3232
3233static void
3234slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3235{
3236 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3237 SV *coro_hv = SvRV (coro_current);
3238 struct coro *coro = SvSTATE_hv (coro_hv);
3239
3240 /* put our coroutine id on the state arg */
3241 av_push (state, SvREFCNT_inc_NN (coro_hv));
3242
3243 /* first see whether we have a non-zero priority and set it as AIO prio */
3244 if (coro->prio)
3245 {
3246 dSP;
3247
3248 static SV *prio_cv;
3249 static SV *prio_sv;
3250
3251 if (ecb_expect_false (!prio_cv))
3252 {
3253 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3254 prio_sv = newSViv (0);
3255 }
3256
3257 PUSHMARK (SP);
3258 sv_setiv (prio_sv, coro->prio);
3259 XPUSHs (prio_sv);
3260
3261 PUTBACK;
3262 call_sv (prio_cv, G_VOID | G_DISCARD);
3263 }
3264
3265 /* now call the original request */
3266 {
3267 dSP;
3268 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3269 int i;
3270
3271 PUSHMARK (SP);
3272
3273 /* first push all args to the stack */
3274 EXTEND (SP, items + 1);
3275
3276 for (i = 0; i < items; ++i)
3277 PUSHs (arg [i]);
3278
3279 /* now push the callback closure */
3280 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3281
3282 /* now call the AIO function - we assume our request is uncancelable */
3283 PUTBACK;
3284 call_sv ((SV *)req, G_VOID | G_DISCARD);
3285 }
3286
3287 /* now that the request is going, we loop till we have a result */
3288 frame->data = (void *)state;
3289 frame->prepare = prepare_schedule;
3290 frame->check = slf_check_aio_req;
3291}
3292
3293static void
3294coro_aio_req_xs (pTHX_ CV *cv)
3295{
3296 dXSARGS;
3297
3298 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3299
3300 XSRETURN_EMPTY;
3301}
3302
3303/*****************************************************************************/
3304
3305#if CORO_CLONE
3306# include "clone.c"
3307#endif
3308
3309/*****************************************************************************/
3310
3311static SV *
3312coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3313{
3314 SV *coro_sv;
3315 struct coro *coro;
3316 MAGIC *mg;
3317 HV *hv;
3318 SV *cb;
3319 int i;
3320
3321 if (argc > 0)
3322 {
3323 cb = s_get_cv_croak (argv [0]);
3324
3325 if (!is_coro)
3326 {
3327 if (CvISXSUB (cb))
3328 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3329
3330 if (!CvROOT (cb))
3331 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3332 }
3333 }
3334
3335 Newz (0, coro, 1, struct coro);
3336 coro->args = newAV ();
3337 coro->flags = CF_NEW;
3338
3339 if (coro_first) coro_first->prev = coro;
3340 coro->next = coro_first;
3341 coro_first = coro;
3342
3343 coro->hv = hv = newHV ();
3344 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3345 mg->mg_flags |= MGf_DUP;
3346 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3347
3348 if (argc > 0)
3349 {
3350 av_extend (coro->args, argc + is_coro - 1);
3351
3352 if (is_coro)
3353 {
3354 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3355 cb = (SV *)cv_coro_run;
3356 }
3357
3358 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3359
3360 for (i = 1; i < argc; i++)
3361 av_push (coro->args, newSVsv (argv [i]));
3362 }
3363
3364 return coro_sv;
3365}
3366
3367#ifndef __cplusplus
3368ecb_cold XS(boot_Coro__State);
3369#endif
3370
3371#if CORO_JIT
3372
3373static void ecb_noinline ecb_cold
3374pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3375{
3376 dSP;
3377 AV *av = newAV ();
3378
3379 av_store (av, 3, newSVuv (d));
3380 av_store (av, 2, newSVuv (c));
3381 av_store (av, 1, newSVuv (b));
3382 av_store (av, 0, newSVuv (a));
3383
3384 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3385
3386 PUTBACK;
3387}
3388
3389static void ecb_noinline ecb_cold
3390jit_init (pTHX)
3391{
3392 dSP;
3393 SV *load, *save;
3394 char *map_base;
3395 char *load_ptr, *save_ptr;
3396 STRLEN load_len, save_len, map_len;
3397 int count;
3398
3399 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3400
3401 PUSHMARK (SP);
3402 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3403 #include "state.h"
3404 count = call_pv ("Coro::State::_jit", G_ARRAY);
3405 SPAGAIN;
3406
3407 save = POPs; save_ptr = SvPVbyte (save, save_len);
3408 load = POPs; load_ptr = SvPVbyte (load, load_len);
3409
3410 map_len = load_len + save_len + 16;
3411
3412 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3413
3414 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3415
3416 load_perl_slots = (load_save_perl_slots_type)map_base;
3417 memcpy (map_base, load_ptr, load_len);
3418
3419 map_base += (load_len + 15) & ~15;
3420
3421 save_perl_slots = (load_save_perl_slots_type)map_base;
3422 memcpy (map_base, save_ptr, save_len);
3423
3424 /* we are good citizens and try to make the page read-only, so the evil evil */
3425 /* hackers might have it a bit more difficult */
3426 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3427
3428 PUTBACK;
3429 eval_pv ("undef &Coro::State::_jit", 1);
3430}
3431
3432#endif
3433
990MODULE = Coro::State PACKAGE = Coro::State 3434MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
991 3435
992PROTOTYPES: DISABLE 3436PROTOTYPES: DISABLE
993 3437
994BOOT: 3438BOOT:
995{ 3439{
996#ifdef USE_ITHREADS 3440#ifdef USE_ITHREADS
997 MUTEX_INIT (&coro_mutex); 3441# if CORO_PTHREAD
3442 coro_thx = PERL_GET_CONTEXT;
3443# endif
998#endif 3444#endif
999 BOOT_PAGESIZE; 3445 BOOT_PAGESIZE;
1000 3446
3447 /* perl defines these to check for existance first, but why it doesn't */
3448 /* just create them one at init time is not clear to me, except for */
3449 /* programs trying to delete them, but... */
3450 /* anyway, we declare this as invalid and make sure they are initialised here */
3451 DEFSV;
3452 ERRSV;
3453
3454 cctx_current = cctx_new_empty ();
3455
3456 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3457 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3458
3459 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3460 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3461 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3462
3463 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3464 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3465 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3466
1001 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3467 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1002 3468
1003 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3469 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1004 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3470 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1005 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3471 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
3472 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1006 3473
1007 main_mainstack = PL_mainstack; 3474 main_mainstack = PL_mainstack;
3475 main_top_env = PL_top_env;
1008 3476
3477 while (main_top_env->je_prev)
3478 main_top_env = main_top_env->je_prev;
3479
3480 {
3481 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3482
3483 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3484 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3485
3486 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3487 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3488 }
3489
1009 coroapi.ver = CORO_API_VERSION; 3490 coroapi.ver = CORO_API_VERSION;
3491 coroapi.rev = CORO_API_REVISION;
3492
1010 coroapi.transfer = api_transfer; 3493 coroapi.transfer = api_transfer;
1011 3494
1012 Newz (0, main_stack, 1, coro_stack); 3495 coroapi.sv_state = SvSTATE_;
1013 main_stack->idle_sp = (void *)-1; 3496 coroapi.execute_slf = api_execute_slf;
3497 coroapi.prepare_nop = prepare_nop;
3498 coroapi.prepare_schedule = prepare_schedule;
3499 coroapi.prepare_cede = prepare_cede;
3500 coroapi.prepare_cede_notself = prepare_cede_notself;
1014 3501
3502 time_init (aTHX);
3503
1015 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3504 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3505#if CORO_JIT
3506 PUTBACK;
3507 jit_init (aTHX);
3508 SPAGAIN;
3509#endif
1016} 3510}
1017 3511
1018SV * 3512SV *
1019new (char *klass, ...) 3513new (SV *klass, ...)
3514 ALIAS:
3515 Coro::new = 1
1020 CODE: 3516 CODE:
1021{ 3517 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1022 struct coro *coro; 3518 OUTPUT:
1023 HV *hv;
1024 int i;
1025
1026 Newz (0, coro, 1, struct coro);
1027 coro->args = newAV ();
1028
1029 hv = newHV ();
1030 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1031 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1032
1033 for (i = 1; i < items; i++)
1034 av_push (coro->args, newSVsv (ST (i)));
1035
1036 coro->stack = main_stack;
1037 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1038 /*coro->stack = 0;*/
1039}
1040 OUTPUT:
1041 RETVAL 3519 RETVAL
1042 3520
1043void 3521void
1044_set_stacklevel (...) 3522transfer (...)
1045 ALIAS: 3523 PROTOTYPE: $$
1046 Coro::State::transfer = 1 3524 CODE:
1047 Coro::schedule = 2 3525 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1048 Coro::cede = 3
1049 Coro::Cont::yield = 4
1050 CODE:
1051{
1052 struct transfer_args ta;
1053
1054 switch (ix)
1055 {
1056 case 0:
1057 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));
1058 ta.next = 0;
1059 ta.flags = TRANSFER_SET_STACKLEVEL;
1060 break;
1061
1062 case 1:
1063 if (items != 3)
1064 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1065
1066 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1067 break;
1068
1069 case 2:
1070 prepare_schedule (&ta);
1071 break;
1072
1073 case 3:
1074 prepare_cede (&ta);
1075 break;
1076
1077 case 4:
1078 {
1079 SV *yieldstack;
1080 SV *sv;
1081 AV *defav = GvAV (PL_defgv);
1082
1083 yieldstack = *hv_fetch (
1084 (HV *)SvRV (GvSV (coro_current)),
1085 "yieldstack", sizeof ("yieldstack") - 1,
1086 0
1087 );
1088
1089 /* set up @_ -- ugly */
1090 av_clear (defav);
1091 av_fill (defav, items - 1);
1092 while (items--)
1093 av_store (defav, items, SvREFCNT_inc (ST(items)));
1094
1095 sv = av_pop ((AV *)SvRV (yieldstack));
1096 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1097 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1098 ta.flags = 0;
1099 SvREFCNT_dec (sv);
1100 }
1101 break;
1102
1103 }
1104
1105 TRANSFER (ta);
1106}
1107 3526
1108void 3527void
1109_clone_state_from (SV *dst, SV *src)
1110 CODE:
1111{
1112 struct coro *coro_src = SvSTATE (src);
1113
1114 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1115
1116 ++coro_src->refcnt;
1117 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1118}
1119
1120void
1121_nonlocal_goto (IV nextop)
1122 CODE:
1123 /* uuh, somebody will kill me again for this */
1124 PL_op->op_next = INT2PTR (OP *, nextop);
1125
1126void
1127_exit (code) 3528_exit (int code)
1128 int code
1129 PROTOTYPE: $ 3529 PROTOTYPE: $
1130 CODE: 3530 CODE:
1131 _exit (code); 3531 _exit (code);
1132 3532
3533SV *
3534clone (Coro::State coro)
3535 CODE:
3536{
3537#if CORO_CLONE
3538 struct coro *ncoro = coro_clone (aTHX_ coro);
3539 MAGIC *mg;
3540 /* TODO: too much duplication */
3541 ncoro->hv = newHV ();
3542 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3543 mg->mg_flags |= MGf_DUP;
3544 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3545#else
3546 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3547#endif
3548}
3549 OUTPUT:
3550 RETVAL
3551
3552int
3553cctx_stacksize (int new_stacksize = 0)
3554 PROTOTYPE: ;$
3555 CODE:
3556 RETVAL = cctx_stacksize;
3557 if (new_stacksize)
3558 {
3559 cctx_stacksize = new_stacksize;
3560 ++cctx_gen;
3561 }
3562 OUTPUT:
3563 RETVAL
3564
3565int
3566cctx_max_idle (int max_idle = 0)
3567 PROTOTYPE: ;$
3568 CODE:
3569 RETVAL = cctx_max_idle;
3570 if (max_idle > 1)
3571 cctx_max_idle = max_idle;
3572 OUTPUT:
3573 RETVAL
3574
3575int
3576cctx_count ()
3577 PROTOTYPE:
3578 CODE:
3579 RETVAL = cctx_count;
3580 OUTPUT:
3581 RETVAL
3582
3583int
3584cctx_idle ()
3585 PROTOTYPE:
3586 CODE:
3587 RETVAL = cctx_idle;
3588 OUTPUT:
3589 RETVAL
3590
3591void
3592list ()
3593 PROTOTYPE:
3594 PPCODE:
3595{
3596 struct coro *coro;
3597 for (coro = coro_first; coro; coro = coro->next)
3598 if (coro->hv)
3599 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3600}
3601
3602void
3603call (Coro::State coro, SV *coderef)
3604 ALIAS:
3605 eval = 1
3606 CODE:
3607{
3608 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3609 {
3610 struct coro *current = SvSTATE_current;
3611 struct CoroSLF slf_save;
3612
3613 if (current != coro)
3614 {
3615 PUTBACK;
3616 save_perl (aTHX_ current);
3617 load_perl (aTHX_ coro);
3618 /* the coro is most likely in an active SLF call.
3619 * while not strictly required (the code we execute is
3620 * not allowed to call any SLF functions), it's cleaner
3621 * to reinitialise the slf_frame and restore it later.
3622 * This might one day allow us to actually do SLF calls
3623 * from code executed here.
3624 */
3625 slf_save = slf_frame;
3626 slf_frame.prepare = 0;
3627 SPAGAIN;
3628 }
3629
3630 PUSHSTACK;
3631
3632 PUSHMARK (SP);
3633 PUTBACK;
3634
3635 if (ix)
3636 eval_sv (coderef, 0);
3637 else
3638 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3639
3640 POPSTACK;
3641 SPAGAIN;
3642
3643 if (current != coro)
3644 {
3645 PUTBACK;
3646 slf_frame = slf_save;
3647 save_perl (aTHX_ coro);
3648 load_perl (aTHX_ current);
3649 SPAGAIN;
3650 }
3651 }
3652}
3653
3654SV *
3655is_ready (Coro::State coro)
3656 PROTOTYPE: $
3657 ALIAS:
3658 is_ready = CF_READY
3659 is_running = CF_RUNNING
3660 is_new = CF_NEW
3661 is_destroyed = CF_ZOMBIE
3662 is_zombie = CF_ZOMBIE
3663 is_suspended = CF_SUSPENDED
3664 CODE:
3665 RETVAL = boolSV (coro->flags & ix);
3666 OUTPUT:
3667 RETVAL
3668
3669void
3670throw (SV *self, SV *exception = &PL_sv_undef)
3671 PROTOTYPE: $;$
3672 CODE:
3673{
3674 struct coro *coro = SvSTATE (self);
3675 struct coro *current = SvSTATE_current;
3676 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3677 SvREFCNT_dec (*exceptionp);
3678 SvGETMAGIC (exception);
3679 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3680
3681 api_ready (aTHX_ self);
3682}
3683
3684void
3685api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3686 PROTOTYPE: $;$
3687 C_ARGS: aTHX_ coro, flags
3688
3689SV *
3690has_cctx (Coro::State coro)
3691 PROTOTYPE: $
3692 CODE:
3693 /* maybe manage the running flag differently */
3694 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3695 OUTPUT:
3696 RETVAL
3697
3698int
3699is_traced (Coro::State coro)
3700 PROTOTYPE: $
3701 CODE:
3702 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3703 OUTPUT:
3704 RETVAL
3705
3706UV
3707rss (Coro::State coro)
3708 PROTOTYPE: $
3709 ALIAS:
3710 usecount = 1
3711 CODE:
3712 switch (ix)
3713 {
3714 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3715 case 1: RETVAL = coro->usecount; break;
3716 }
3717 OUTPUT:
3718 RETVAL
3719
3720void
3721force_cctx ()
3722 PROTOTYPE:
3723 CODE:
3724 cctx_current->idle_sp = 0;
3725
3726void
3727swap_defsv (Coro::State self)
3728 PROTOTYPE: $
3729 ALIAS:
3730 swap_defav = 1
3731 CODE:
3732 if (!self->slot)
3733 croak ("cannot swap state with coroutine that has no saved state,");
3734 else
3735 {
3736 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3737 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3738
3739 SV *tmp = *src; *src = *dst; *dst = tmp;
3740 }
3741
3742void
3743cancel (Coro::State self)
3744 CODE:
3745 coro_state_destroy (aTHX_ self);
3746
3747SV *
3748enable_times (int enabled = enable_times)
3749 CODE:
3750{
3751 RETVAL = boolSV (enable_times);
3752
3753 if (enabled != enable_times)
3754 {
3755 enable_times = enabled;
3756
3757 coro_times_update ();
3758 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3759 }
3760}
3761 OUTPUT:
3762 RETVAL
3763
3764void
3765times (Coro::State self)
3766 PPCODE:
3767{
3768 struct coro *current = SvSTATE (coro_current);
3769
3770 if (ecb_expect_false (current == self))
3771 {
3772 coro_times_update ();
3773 coro_times_add (SvSTATE (coro_current));
3774 }
3775
3776 EXTEND (SP, 2);
3777 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3778 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3779
3780 if (ecb_expect_false (current == self))
3781 coro_times_sub (SvSTATE (coro_current));
3782}
3783
3784void
3785swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3786 CODE:
3787{
3788 struct coro *current = SvSTATE_current;
3789
3790 if (current == coro)
3791 SWAP_SVS (current);
3792
3793 if (!coro->swap_sv)
3794 coro->swap_sv = newAV ();
3795
3796 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3797 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3798
3799 if (current == coro)
3800 SWAP_SVS (current);
3801}
3802
3803
1133MODULE = Coro::State PACKAGE = Coro 3804MODULE = Coro::State PACKAGE = Coro
1134 3805
1135BOOT: 3806BOOT:
1136{ 3807{
1137 int i; 3808 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3809 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3810 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3811 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3812 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3813 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3814 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3815 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1138 3816
3817 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3818 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3819 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3820 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3821
1139 coro_stash = gv_stashpv ("Coro", TRUE); 3822 coro_stash = gv_stashpv ("Coro", TRUE);
1140 3823
1141 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3824 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1142 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3825 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1143 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3826 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1144 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3827 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1145 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3828 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1146 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3829 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1147
1148 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1149 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1150
1151 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1152 coro_ready[i] = newAV ();
1153 3830
1154 { 3831 {
1155 SV *sv = perl_get_sv("Coro::API", 1); 3832 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1156 3833
1157 coroapi.schedule = api_schedule; 3834 coroapi.schedule = api_schedule;
3835 coroapi.schedule_to = api_schedule_to;
1158 coroapi.cede = api_cede; 3836 coroapi.cede = api_cede;
3837 coroapi.cede_notself = api_cede_notself;
1159 coroapi.ready = api_ready; 3838 coroapi.ready = api_ready;
3839 coroapi.is_ready = api_is_ready;
1160 coroapi.nready = &coro_nready; 3840 coroapi.nready = coro_nready;
1161 coroapi.current = coro_current; 3841 coroapi.current = coro_current;
1162 3842
1163 GCoroAPI = &coroapi; 3843 /*GCoroAPI = &coroapi;*/
1164 sv_setiv (sv, (IV)&coroapi); 3844 sv_setiv (sv, (IV)&coroapi);
1165 SvREADONLY_on (sv); 3845 SvREADONLY_on (sv);
1166 } 3846 }
1167} 3847}
1168 3848
3849SV *
3850async (...)
3851 PROTOTYPE: &@
3852 CODE:
3853 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3854 api_ready (aTHX_ RETVAL);
3855 OUTPUT:
3856 RETVAL
3857
3858void
3859_destroy (Coro::State coro)
3860 CODE:
3861 /* used by the manager thread */
3862 coro_state_destroy (aTHX_ coro);
3863
3864void
3865on_destroy (Coro::State coro, SV *cb)
3866 CODE:
3867 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3868
3869void
3870join (...)
3871 CODE:
3872 CORO_EXECUTE_SLF_XS (slf_init_join);
3873
3874void
3875terminate (...)
3876 CODE:
3877 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3878
3879void
3880cancel (...)
3881 CODE:
3882 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3883
3884int
3885safe_cancel (Coro::State self, ...)
3886 C_ARGS: aTHX_ self, &ST (1), items - 1
3887
3888void
3889schedule (...)
3890 CODE:
3891 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3892
3893void
3894schedule_to (...)
3895 CODE:
3896 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3897
3898void
3899cede_to (...)
3900 CODE:
3901 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3902
3903void
3904cede (...)
3905 CODE:
3906 CORO_EXECUTE_SLF_XS (slf_init_cede);
3907
3908void
3909cede_notself (...)
3910 CODE:
3911 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3912
3913void
3914_set_current (SV *current)
3915 PROTOTYPE: $
3916 CODE:
3917 SvREFCNT_dec (SvRV (coro_current));
3918 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3919
3920void
3921_set_readyhook (SV *hook)
3922 PROTOTYPE: $
3923 CODE:
3924 SvREFCNT_dec (coro_readyhook);
3925 SvGETMAGIC (hook);
3926 if (SvOK (hook))
3927 {
3928 coro_readyhook = newSVsv (hook);
3929 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3930 }
3931 else
3932 {
3933 coro_readyhook = 0;
3934 CORO_READYHOOK = 0;
3935 }
3936
1169int 3937int
1170prio (Coro::State coro, int newprio = 0) 3938prio (Coro::State coro, int newprio = 0)
3939 PROTOTYPE: $;$
1171 ALIAS: 3940 ALIAS:
1172 nice = 1 3941 nice = 1
1173 CODE: 3942 CODE:
1174{ 3943{
1175 RETVAL = coro->prio; 3944 RETVAL = coro->prio;
1176 3945
1177 if (items > 1) 3946 if (items > 1)
1178 { 3947 {
1179 if (ix) 3948 if (ix)
1180 newprio += coro->prio; 3949 newprio = coro->prio - newprio;
1181 3950
1182 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3951 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1183 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3952 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1184 3953
1185 coro->prio = newprio; 3954 coro->prio = newprio;
1186 } 3955 }
1187} 3956}
3957 OUTPUT:
3958 RETVAL
1188 3959
1189void 3960SV *
1190ready (SV *self) 3961ready (SV *self)
1191 PROTOTYPE: $ 3962 PROTOTYPE: $
1192 CODE: 3963 CODE:
1193 api_ready (self); 3964 RETVAL = boolSV (api_ready (aTHX_ self));
3965 OUTPUT:
3966 RETVAL
1194 3967
1195int 3968int
1196nready (...) 3969nready (...)
1197 PROTOTYPE: 3970 PROTOTYPE:
1198 CODE: 3971 CODE:
1199 RETVAL = coro_nready; 3972 RETVAL = coro_nready;
1200 OUTPUT: 3973 OUTPUT:
1201 RETVAL 3974 RETVAL
1202 3975
1203MODULE = Coro::State PACKAGE = Coro::AIO 3976void
3977suspend (Coro::State self)
3978 PROTOTYPE: $
3979 CODE:
3980 self->flags |= CF_SUSPENDED;
3981
3982void
3983resume (Coro::State self)
3984 PROTOTYPE: $
3985 CODE:
3986 self->flags &= ~CF_SUSPENDED;
3987
3988void
3989_pool_handler (...)
3990 CODE:
3991 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3992
3993void
3994async_pool (SV *cv, ...)
3995 PROTOTYPE: &@
3996 PPCODE:
3997{
3998 HV *hv = (HV *)av_pop (av_async_pool);
3999 AV *av = newAV ();
4000 SV *cb = ST (0);
4001 int i;
4002
4003 av_extend (av, items - 2);
4004 for (i = 1; i < items; ++i)
4005 av_push (av, SvREFCNT_inc_NN (ST (i)));
4006
4007 if ((SV *)hv == &PL_sv_undef)
4008 {
4009 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
4010 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
4011 SvREFCNT_dec (sv);
4012 }
4013
4014 {
4015 struct coro *coro = SvSTATE_hv (hv);
4016
4017 assert (!coro->invoke_cb);
4018 assert (!coro->invoke_av);
4019 coro->invoke_cb = SvREFCNT_inc (cb);
4020 coro->invoke_av = av;
4021 }
4022
4023 api_ready (aTHX_ (SV *)hv);
4024
4025 if (GIMME_V != G_VOID)
4026 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4027 else
4028 SvREFCNT_dec (hv);
4029}
1204 4030
1205SV * 4031SV *
1206_get_state () 4032rouse_cb ()
4033 PROTOTYPE:
1207 CODE: 4034 CODE:
1208{ 4035 RETVAL = coro_new_rouse_cb (aTHX);
1209 struct {
1210 int errorno;
1211 int laststype;
1212 int laststatval;
1213 Stat_t statcache;
1214 } data;
1215
1216 data.errorno = errno;
1217 data.laststype = PL_laststype;
1218 data.laststatval = PL_laststatval;
1219 data.statcache = PL_statcache;
1220
1221 RETVAL = newSVpvn ((char *)&data, sizeof data);
1222}
1223 OUTPUT: 4036 OUTPUT:
1224 RETVAL 4037 RETVAL
1225 4038
1226void 4039void
1227_set_state (char *data_) 4040rouse_wait (...)
4041 PROTOTYPE: ;$
4042 PPCODE:
4043 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4044
4045void
4046on_enter (SV *block)
4047 ALIAS:
4048 on_leave = 1
1228 PROTOTYPE: $ 4049 PROTOTYPE: &
1229 CODE: 4050 CODE:
1230{ 4051{
1231 struct { 4052 struct coro *coro = SvSTATE_current;
4053 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
4054
4055 block = s_get_cv_croak (block);
4056
4057 if (!*avp)
4058 *avp = newAV ();
4059
4060 av_push (*avp, SvREFCNT_inc (block));
4061
4062 if (!ix)
4063 on_enterleave_call (aTHX_ block);
4064
4065 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4066 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4067 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4068}
4069
4070
4071MODULE = Coro::State PACKAGE = PerlIO::cede
4072
4073BOOT:
4074 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4075
4076
4077MODULE = Coro::State PACKAGE = Coro::Semaphore
4078
4079SV *
4080new (SV *klass, SV *count = 0)
4081 CODE:
4082{
4083 int semcnt = 1;
4084
4085 if (count)
4086 {
4087 SvGETMAGIC (count);
4088
4089 if (SvOK (count))
4090 semcnt = SvIV (count);
4091 }
4092
4093 RETVAL = sv_bless (
4094 coro_waitarray_new (aTHX_ semcnt),
4095 GvSTASH (CvGV (cv))
4096 );
4097}
4098 OUTPUT:
4099 RETVAL
4100
4101# helper for Coro::Channel and others
4102SV *
4103_alloc (int count)
4104 CODE:
4105 RETVAL = coro_waitarray_new (aTHX_ count);
4106 OUTPUT:
4107 RETVAL
4108
4109SV *
4110count (SV *self)
4111 CODE:
4112 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4113 OUTPUT:
4114 RETVAL
4115
4116void
4117up (SV *self, int adjust = 1)
4118 ALIAS:
4119 adjust = 1
4120 CODE:
4121 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4122
4123void
4124down (...)
4125 CODE:
4126 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4127
4128void
4129wait (...)
4130 CODE:
4131 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4132
4133void
4134try (SV *self)
4135 PPCODE:
4136{
4137 AV *av = (AV *)SvRV (self);
4138 SV *count_sv = AvARRAY (av)[0];
4139 IV count = SvIVX (count_sv);
4140
4141 if (count > 0)
4142 {
4143 --count;
4144 SvIVX (count_sv) = count;
4145 XSRETURN_YES;
4146 }
4147 else
4148 XSRETURN_NO;
4149}
4150
4151void
4152waiters (SV *self)
4153 PPCODE:
4154{
4155 AV *av = (AV *)SvRV (self);
4156 int wcount = AvFILLp (av) + 1 - 1;
4157
4158 if (GIMME_V == G_SCALAR)
4159 XPUSHs (sv_2mortal (newSViv (wcount)));
4160 else
4161 {
1232 int errorno; 4162 int i;
1233 int laststype; 4163 EXTEND (SP, wcount);
1234 int laststatval; 4164 for (i = 1; i <= wcount; ++i)
1235 Stat_t statcache; 4165 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1236 } *data = (void *)data_; 4166 }
1237
1238 errno = data->errorno;
1239 PL_laststype = data->laststype;
1240 PL_laststatval = data->laststatval;
1241 PL_statcache = data->statcache;
1242} 4167}
4168
4169MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4170
4171void
4172_may_delete (SV *sem, int count, unsigned int extra_refs)
4173 PPCODE:
4174{
4175 AV *av = (AV *)SvRV (sem);
4176
4177 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4178 && AvFILLp (av) == 0 /* no waiters, just count */
4179 && SvIV (AvARRAY (av)[0]) == count)
4180 XSRETURN_YES;
4181
4182 XSRETURN_NO;
4183}
4184
4185MODULE = Coro::State PACKAGE = Coro::Signal
4186
4187SV *
4188new (SV *klass)
4189 CODE:
4190 RETVAL = sv_bless (
4191 coro_waitarray_new (aTHX_ 0),
4192 GvSTASH (CvGV (cv))
4193 );
4194 OUTPUT:
4195 RETVAL
4196
4197void
4198wait (...)
4199 CODE:
4200 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4201
4202void
4203broadcast (SV *self)
4204 CODE:
4205{
4206 AV *av = (AV *)SvRV (self);
4207 coro_signal_wake (aTHX_ av, AvFILLp (av));
4208}
4209
4210void
4211send (SV *self)
4212 CODE:
4213{
4214 AV *av = (AV *)SvRV (self);
4215
4216 if (AvFILLp (av))
4217 coro_signal_wake (aTHX_ av, 1);
4218 else
4219 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4220}
4221
4222IV
4223awaited (SV *self)
4224 CODE:
4225 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4226 OUTPUT:
4227 RETVAL
4228
4229
4230MODULE = Coro::State PACKAGE = Coro::AnyEvent
4231
4232BOOT:
4233 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4234
4235void
4236_schedule (...)
4237 CODE:
4238{
4239 static int incede;
4240
4241 api_cede_notself (aTHX);
4242
4243 ++incede;
4244 while (coro_nready >= incede && api_cede (aTHX))
4245 ;
4246
4247 sv_setsv (sv_activity, &PL_sv_undef);
4248 if (coro_nready >= incede)
4249 {
4250 PUSHMARK (SP);
4251 PUTBACK;
4252 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4253 }
4254
4255 --incede;
4256}
4257
4258
4259MODULE = Coro::State PACKAGE = Coro::AIO
4260
4261void
4262_register (char *target, char *proto, SV *req)
4263 CODE:
4264{
4265 SV *req_cv = s_get_cv_croak (req);
4266 /* newXSproto doesn't return the CV on 5.8 */
4267 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4268 sv_setpv ((SV *)slf_cv, proto);
4269 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4270}
4271
4272MODULE = Coro::State PACKAGE = Coro::Select
4273
4274void
4275patch_pp_sselect ()
4276 CODE:
4277 if (!coro_old_pp_sselect)
4278 {
4279 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4280 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4281 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4282 }
4283
4284void
4285unpatch_pp_sselect ()
4286 CODE:
4287 if (coro_old_pp_sselect)
4288 {
4289 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4290 coro_old_pp_sselect = 0;
4291 }
4292

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