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Comparing Coro/Coro/State.xs (file contents):
Revision 1.148 by root, Fri Apr 13 12:56:55 2007 UTC vs.
Revision 1.474 by root, Tue Aug 14 15:46:03 2018 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1 /* perl usually disables NDEBUG later */
5
1#include "libcoro/coro.c" 6#include "libcoro/coro.c"
2 7
8#if CORO_UCONTEXT
9 #define CORO_BACKEND "ucontext"
10#elif CORO_SJLJ
11 #define CORO_BACKEND "sjlj"
12#elif CORO_LINUX
13 #define CORO_BACKEND "linux"
14#elif CORO_LOSER
15 #define CORO_BACKEND "loser"
16#elif CORO_FIBER
17 #define CORO_BACKEND "fiber"
18#elif CORO_IRIX
19 #define CORO_BACKEND "irix"
20#elif CORO_ASM
21 #define CORO_BACKEND "asm"
22#elif CORO_PTHREAD
23 #define CORO_BACKEND "pthread"
24#else
25 #define CORO_BACKEND "unknown"
26#endif
27
3#define PERL_NO_GET_CONTEXT 28#define PERL_NO_GET_CONTEXT
29#define PERL_EXT
4 30
5#include "EXTERN.h" 31#include "EXTERN.h"
6#include "perl.h" 32#include "perl.h"
7#include "XSUB.h" 33#include "XSUB.h"
34#include "perliol.h"
8 35
9#include "patchlevel.h" 36#include "schmorp.h"
10 37
38#define ECB_NO_THREADS 1
39#define ECB_NO_LIBM 1
40#include "ecb.h"
41
42#include <stddef.h>
11#include <stdio.h> 43#include <stdio.h>
12#include <errno.h> 44#include <errno.h>
13#include <assert.h> 45#include <assert.h>
14 46
15#ifdef HAVE_MMAP 47#ifndef SvREFCNT_dec_NN
16# include <unistd.h> 48 #define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv)
17# include <sys/mman.h>
18# ifndef MAP_ANONYMOUS
19# ifdef MAP_ANON
20# define MAP_ANONYMOUS MAP_ANON
21# else
22# undef HAVE_MMAP
23# endif 49#endif
50
51#ifndef SvREFCNT_inc_NN
52 #define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
53#endif
54
55#ifndef SVs_PADSTALE
56# define SVs_PADSTALE 0
57#endif
58
59#ifdef PadARRAY
60# define NEWPADAPI 1
61# define newPADLIST(var) (Newz (0, var, 1, PADLIST), Newx (PadlistARRAY (var), 2, PAD *))
62#else
63typedef AV PADNAMELIST;
64# if !PERL_VERSION_ATLEAST(5,8,0)
65typedef AV PADLIST;
66typedef AV PAD;
24# endif 67# endif
25# include <limits.h> 68# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
26# ifndef PAGESIZE 69# define PadlistMAX(pl) AvFILLp (pl)
27# define PAGESIZE pagesize 70# define PadlistNAMES(pl) (*PadlistARRAY (pl))
28# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 71# define PadARRAY AvARRAY
29static long pagesize; 72# define PadMAX AvFILLp
30# else 73# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
31# define BOOT_PAGESIZE (void)0
32# endif 74#endif
75#ifndef PadnamelistREFCNT
76# define PadnamelistREFCNT(pnl) SvREFCNT (pnl)
77#endif
78#ifndef PadnamelistREFCNT_dec
79# define PadnamelistREFCNT_dec(pnl) SvREFCNT_dec (pnl)
80#endif
81
82/* 5.19.something has replaced SVt_BIND by SVt_INVLIST */
83/* we just alias it to SVt_IV, as that is sufficient for swap_sv for now */
84#if PERL_VERSION_ATLEAST(5,19,0)
85# define SVt_BIND SVt_IV
86#endif
87
88#if defined(_WIN32)
89# undef HAS_GETTIMEOFDAY
90# undef setjmp
91# undef longjmp
92# undef _exit
93# define setjmp _setjmp /* deep magic */
33#else 94#else
34# define PAGESIZE 0 95# include <inttypes.h> /* most portable stdint.h */
35# define BOOT_PAGESIZE (void)0
36#endif
37
38#if CORO_USE_VALGRIND
39# include <valgrind/valgrind.h>
40# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
41#else
42# define REGISTER_STACK(cctx,start,end)
43#endif 96#endif
44 97
45/* the maximum number of idle cctx that will be pooled */ 98/* the maximum number of idle cctx that will be pooled */
46#define MAX_IDLE_CCTX 8 99static int cctx_max_idle = 4;
47 100
48#define PERL_VERSION_ATLEAST(a,b,c) \ 101#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
49 (PERL_REVISION > (a) \ 102# define HAS_SCOPESTACK_NAME 1
50 || (PERL_REVISION == (a) \
51 && (PERL_VERSION > (b) \
52 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
53
54#if !PERL_VERSION_ATLEAST (5,6,0)
55# ifndef PL_ppaddr
56# define PL_ppaddr ppaddr
57# endif
58# ifndef call_sv
59# define call_sv perl_call_sv
60# endif
61# ifndef get_sv
62# define get_sv perl_get_sv
63# endif
64# ifndef get_cv
65# define get_cv perl_get_cv
66# endif
67# ifndef IS_PADGV
68# define IS_PADGV(v) 0
69# endif
70# ifndef IS_PADCONST
71# define IS_PADCONST(v) 0
72# endif
73#endif
74
75/* 5.8.7 */
76#ifndef SvRV_set
77# define SvRV_set(s,v) SvRV(s) = (v)
78#endif
79
80#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
81# undef CORO_STACKGUARD
82#endif
83
84#ifndef CORO_STACKGUARD
85# define CORO_STACKGUARD 0
86#endif 103#endif
87 104
88/* prefer perl internal functions over our own? */ 105/* prefer perl internal functions over our own? */
89#ifndef CORO_PREFER_PERL_FUNCTIONS 106#ifndef CORO_PREFER_PERL_FUNCTIONS
90# define CORO_PREFER_PERL_FUNCTIONS 0 107# define CORO_PREFER_PERL_FUNCTIONS 0
91#endif 108#endif
92 109
93/* The next macro should declare a variable stacklevel that contains and approximation 110/* The next macros try to return the current stack pointer, in an as
94 * to the current C stack pointer. Its property is that it changes with each call 111 * portable way as possible. */
95 * and should be unique. */
96#define dSTACKLEVEL int stacklevel
97#define STACKLEVEL ((void *)&stacklevel)
98
99#define IN_DESTRUCT (PL_main_cv == Nullcv)
100
101#if __GNUC__ >= 3 112#if __GNUC__ >= 4
102# define attribute(x) __attribute__(x) 113# define dSTACKLEVEL int stacklevel_dummy
103# define BARRIER __asm__ __volatile__ ("" : : : "memory") 114# define STACKLEVEL __builtin_frame_address (0)
104#else 115#else
105# define attribute(x) 116# define dSTACKLEVEL volatile void *stacklevel
106# define BARRIER 117# define STACKLEVEL ((void *)&stacklevel)
107#endif 118#endif
108 119
109#define NOINLINE attribute ((noinline)) 120#define IN_DESTRUCT PL_dirty
110 121
111#include "CoroAPI.h" 122#include "CoroAPI.h"
123#define GCoroAPI (&coroapi) /* very sneaky */
112 124
113#ifdef USE_ITHREADS 125#ifdef USE_ITHREADS
114static perl_mutex coro_mutex; 126# if CORO_PTHREAD
115# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 127static void *coro_thx;
116# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 128# endif
129#endif
130
131#ifdef __linux
132# include <time.h> /* for timespec */
133# include <syscall.h> /* for SYS_* */
134# ifdef SYS_clock_gettime
135# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
136# define CORO_CLOCK_MONOTONIC 1
137# define CORO_CLOCK_THREAD_CPUTIME_ID 3
138# endif
139#endif
140
141/* one off bugfix for perl 5.22 */
142#if PERL_VERSION_ATLEAST(5,22,0) && !PERL_VERSION_ATLEAST(5,24,0)
143# undef PadlistNAMES
144# define PadlistNAMES(pl) *((PADNAMELIST **)PadlistARRAY (pl))
145#endif
146
147#if PERL_VERSION_ATLEAST(5,24,0)
148# define SUB_ARGARRAY PL_curpad[0]
117#else 149#else
118# define LOCK (void)0 150# define SUB_ARGARRAY (SV *)cx->blk_sub.argarray
119# define UNLOCK (void)0
120#endif 151#endif
121 152
122/* helper storage struct for Coro::AIO */ 153/* perl usually suppresses asserts. for debugging, we sometimes force it to be on */
123struct io_state 154#if 0
124{ 155# undef NDEBUG
125 int errorno; 156# include <assert.h>
126 I32 laststype; 157#endif
127 int laststatval;
128 Stat_t statcache;
129};
130 158
159static double (*nvtime)(); /* so why doesn't it take void? */
160static void (*u2time)(pTHX_ UV ret[2]);
161
162/* we hijack an hopefully unused CV flag for our purposes */
163#define CVf_SLF 0x4000
164static OP *pp_slf (pTHX);
165static void slf_destroy (pTHX_ struct coro *coro);
166
167static U32 cctx_gen;
131static size_t coro_stacksize = CORO_STACKSIZE; 168static size_t cctx_stacksize = CORO_STACKSIZE;
132static struct CoroAPI coroapi; 169static struct CoroAPI coroapi;
133static AV *main_mainstack; /* used to differentiate between $main and others */ 170static AV *main_mainstack; /* used to differentiate between $main and others */
134static JMPENV *main_top_env; 171static JMPENV *main_top_env;
135static HV *coro_state_stash, *coro_stash; 172static HV *coro_state_stash, *coro_stash;
136static SV *coro_mortal; /* will be freed after next transfer */ 173static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
174
175static AV *av_destroy; /* destruction queue */
176static SV *sv_manager; /* the manager coro */
177static SV *sv_idle; /* $Coro::idle */
178
179static GV *irsgv; /* $/ */
180static GV *stdoutgv; /* *STDOUT */
181static SV *rv_diehook;
182static SV *rv_warnhook;
183
184/* async_pool helper stuff */
185static SV *sv_pool_rss;
186static SV *sv_pool_size;
187static SV *sv_async_pool_idle; /* description string */
188static AV *av_async_pool; /* idle pool */
189static SV *sv_Coro; /* class string */
190static CV *cv_pool_handler;
191
192/* Coro::AnyEvent */
193static SV *sv_activity;
194
195/* enable processtime/realtime profiling */
196static char enable_times;
197typedef U32 coro_ts[2];
198static coro_ts time_real, time_cpu;
199static char times_valid;
137 200
138static struct coro_cctx *cctx_first; 201static struct coro_cctx *cctx_first;
139static int cctx_count, cctx_idle; 202static int cctx_count, cctx_idle;
140 203
204enum
205{
206 CC_MAPPED = 0x01,
207 CC_NOREUSE = 0x02, /* throw this away after tracing */
208 CC_TRACE = 0x04,
209 CC_TRACE_SUB = 0x08, /* trace sub calls */
210 CC_TRACE_LINE = 0x10, /* trace each statement */
211 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
212};
213
141/* this is a structure representing a c-level coroutine */ 214/* this is a structure representing a c-level coroutine */
142typedef struct coro_cctx { 215typedef struct coro_cctx
216{
143 struct coro_cctx *next; 217 struct coro_cctx *next;
144 218
145 /* the stack */ 219 /* the stack */
146 void *sptr; 220 struct coro_stack stack;
147 size_t ssize;
148 221
149 /* cpu state */ 222 /* cpu state */
150 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 223 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
224#ifndef NDEBUG
151 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 225 JMPENV *idle_te; /* same as idle_sp, but for top_env */
226#endif
152 JMPENV *top_env; 227 JMPENV *top_env;
153 coro_context cctx; 228 coro_context cctx;
154 229
230 U32 gen;
155#if CORO_USE_VALGRIND 231#if CORO_USE_VALGRIND
156 int valgrind_id; 232 int valgrind_id;
157#endif 233#endif
158 char inuse, mapped; 234 unsigned char flags;
159} coro_cctx; 235} coro_cctx;
160 236
237static coro_cctx *cctx_current; /* the currently running cctx */
238
239/*****************************************************************************/
240
241static MGVTBL coro_state_vtbl;
242
161enum { 243enum
244{
162 CF_RUNNING = 0x0001, /* coroutine is running */ 245 CF_RUNNING = 0x0001, /* coroutine is running */
163 CF_READY = 0x0002, /* coroutine is ready */ 246 CF_READY = 0x0002, /* coroutine is ready */
164 CF_NEW = 0x0004, /* has never been switched to */ 247 CF_NEW = 0x0004, /* has never been switched to */
165 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 248 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
249 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
250 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
166}; 251};
167 252
253/* the structure where most of the perl state is stored, overlaid on the cxstack */
254typedef struct
255{
256 #define VARx(name,expr,type) type name;
257 #include "state.h"
258} perl_slots;
259
260/* how many context stack entries do we need for perl_slots */
261#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
262
168/* this is a structure representing a perl-level coroutine */ 263/* this is a structure representing a perl-level coroutine */
169struct coro { 264struct coro
265{
170 /* the c coroutine allocated to this perl coroutine, if any */ 266 /* the C coroutine allocated to this perl coroutine, if any */
171 coro_cctx *cctx; 267 coro_cctx *cctx;
172 268
269 /* ready queue */
270 struct coro *next_ready;
271
272 /* state data */
273 struct CoroSLF slf_frame; /* saved slf frame */
274 AV *mainstack;
275 perl_slots *slot; /* basically the saved sp */
276
277 CV *startcv; /* the CV to execute */
173 /* data associated with this coroutine (initial args) */ 278 AV *args; /* data associated with this coroutine (initial args) */
174 AV *args;
175 int refcnt;
176 int save; /* CORO_SAVE flags */
177 int flags; /* CF_ flags */ 279 int flags; /* CF_ flags */
280 HV *hv; /* the perl hash associated with this coro, if any */
178 281
179 /* optionally saved, might be zero */ 282 /* statistics */
180 AV *defav; /* @_ */ 283 int usecount; /* number of transfers to this coro */
181 SV *defsv; /* $_ */
182 SV *errsv; /* $@ */
183 GV *deffh; /* default filehandle */
184 SV *irssv; /* $/ */
185 SV *irssv_sv; /* real $/ cache */
186
187#define VAR(name,type) type name;
188# include "state.h"
189#undef VAR
190 284
191 /* coro process data */ 285 /* coro process data */
192 int prio; 286 int prio;
287 SV *except; /* exception to be thrown */
288 SV *rouse_cb; /* last rouse callback */
289 AV *on_destroy; /* callbacks or coros to notify on destroy */
290 AV *status; /* the exit status list */
291
292 /* async_pool */
293 SV *saved_deffh;
294 SV *invoke_cb;
295 AV *invoke_av;
296
297 /* on_enter/on_leave */
298 AV *on_enter; AV *on_enter_xs;
299 AV *on_leave; AV *on_leave_xs;
300
301 /* swap_sv */
302 AV *swap_sv;
303
304 /* times */
305 coro_ts t_cpu, t_real;
306
307 /* linked list */
308 struct coro *next, *prev;
193}; 309};
194 310
195typedef struct coro *Coro__State; 311typedef struct coro *Coro__State;
196typedef struct coro *Coro__State_or_hashref; 312typedef struct coro *Coro__State_or_hashref;
197 313
314/* the following variables are effectively part of the perl context */
315/* and get copied between struct coro and these variables */
316/* the main reason we don't support windows process emulation */
317static struct CoroSLF slf_frame; /* the current slf frame */
318
198/** Coro ********************************************************************/ 319/** Coro ********************************************************************/
199 320
200#define PRIO_MAX 3 321#define CORO_PRIO_MAX 3
201#define PRIO_HIGH 1 322#define CORO_PRIO_HIGH 1
202#define PRIO_NORMAL 0 323#define CORO_PRIO_NORMAL 0
203#define PRIO_LOW -1 324#define CORO_PRIO_LOW -1
204#define PRIO_IDLE -3 325#define CORO_PRIO_IDLE -3
205#define PRIO_MIN -4 326#define CORO_PRIO_MIN -4
206 327
207/* for Coro.pm */ 328/* for Coro.pm */
208static SV *coro_current; 329static SV *coro_current;
209static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 330static SV *coro_readyhook;
210static int coro_nready; 331static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
332static CV *cv_coro_run;
333static struct coro *coro_first;
334#define coro_nready coroapi.nready
335
336/** JIT *********************************************************************/
337
338#if CORO_JIT
339 /* APPLE doesn't have mmap though */
340 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
341 #ifndef CORO_JIT_TYPE
342 #if ECB_AMD64 && CORO_JIT_UNIXY
343 #define CORO_JIT_TYPE "amd64-unix"
344 #elif __i386 && CORO_JIT_UNIXY
345 #define CORO_JIT_TYPE "x86-unix"
346 #endif
347 #endif
348#endif
349
350#if !defined(CORO_JIT_TYPE) || _POSIX_MEMORY_PROTECTION <= 0
351 #undef CORO_JIT
352#endif
353
354#if CORO_JIT
355 typedef void (*load_save_perl_slots_type)(perl_slots *);
356 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
357#endif
358
359/** Coro::Select ************************************************************/
360
361static OP *(*coro_old_pp_sselect) (pTHX);
362static SV *coro_select_select;
363
364/* horrible hack, but if it works... */
365static OP *
366coro_pp_sselect (pTHX)
367{
368 dSP;
369 PUSHMARK (SP - 4); /* fake argument list */
370 XPUSHs (coro_select_select);
371 PUTBACK;
372
373 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
374 PL_op->op_flags |= OPf_STACKED;
375 PL_op->op_private = 0;
376 return PL_ppaddr [OP_ENTERSUB](aTHX);
377}
378
379/** time stuff **************************************************************/
380
381#ifdef HAS_GETTIMEOFDAY
382
383ecb_inline void
384coro_u2time (pTHX_ UV ret[2])
385{
386 struct timeval tv;
387 gettimeofday (&tv, 0);
388
389 ret [0] = tv.tv_sec;
390 ret [1] = tv.tv_usec;
391}
392
393ecb_inline double
394coro_nvtime (void)
395{
396 struct timeval tv;
397 gettimeofday (&tv, 0);
398
399 return tv.tv_sec + tv.tv_usec * 1e-6;
400}
401
402ecb_inline void
403time_init (pTHX)
404{
405 nvtime = coro_nvtime;
406 u2time = coro_u2time;
407}
408
409#else
410
411ecb_inline void
412time_init (pTHX)
413{
414 SV **svp;
415
416 require_pv ("Time/HiRes.pm");
417
418 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
419
420 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
421 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
422
423 nvtime = INT2PTR (double (*)(), SvIV (*svp));
424
425 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
426 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
427}
428
429#endif
211 430
212/** lowlevel stuff **********************************************************/ 431/** lowlevel stuff **********************************************************/
213 432
214static AV * 433static SV * ecb_noinline
434coro_get_sv (pTHX_ const char *name, int create)
435{
436#if PERL_VERSION_ATLEAST (5,10,0)
437 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
438 get_sv (name, create);
439#endif
440 return get_sv (name, create);
441}
442
443static AV * ecb_noinline
444coro_get_av (pTHX_ const char *name, int create)
445{
446#if PERL_VERSION_ATLEAST (5,10,0)
447 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
448 get_av (name, create);
449#endif
450 return get_av (name, create);
451}
452
453static HV * ecb_noinline
454coro_get_hv (pTHX_ const char *name, int create)
455{
456#if PERL_VERSION_ATLEAST (5,10,0)
457 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
458 get_hv (name, create);
459#endif
460 return get_hv (name, create);
461}
462
463ecb_inline void
464coro_times_update (void)
465{
466#ifdef coro_clock_gettime
467 struct timespec ts;
468
469 ts.tv_sec = ts.tv_nsec = 0;
470 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
471 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
472
473 ts.tv_sec = ts.tv_nsec = 0;
474 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
475 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
476#else
477 dTHX;
478 UV tv[2];
479
480 u2time (aTHX_ tv);
481 time_real [0] = tv [0];
482 time_real [1] = tv [1] * 1000;
483#endif
484}
485
486ecb_inline void
487coro_times_add (struct coro *c)
488{
489 c->t_real [1] += time_real [1];
490 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
491 c->t_real [0] += time_real [0];
492
493 c->t_cpu [1] += time_cpu [1];
494 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
495 c->t_cpu [0] += time_cpu [0];
496}
497
498ecb_inline void
499coro_times_sub (struct coro *c)
500{
501 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
502 c->t_real [1] -= time_real [1];
503 c->t_real [0] -= time_real [0];
504
505 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
506 c->t_cpu [1] -= time_cpu [1];
507 c->t_cpu [0] -= time_cpu [0];
508}
509
510/*****************************************************************************/
511/* magic glue */
512
513#define CORO_MAGIC_type_cv 26
514#define CORO_MAGIC_type_state PERL_MAGIC_ext
515
516#define CORO_MAGIC_NN(sv, type) \
517 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
518 ? SvMAGIC (sv) \
519 : mg_find (sv, type))
520
521#define CORO_MAGIC(sv, type) \
522 (ecb_expect_true (SvMAGIC (sv)) \
523 ? CORO_MAGIC_NN (sv, type) \
524 : 0)
525
526#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
527#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
528
529ecb_inline MAGIC *
530SvSTATEhv_p (pTHX_ SV *coro)
531{
532 MAGIC *mg;
533
534 if (ecb_expect_true (
535 SvTYPE (coro) == SVt_PVHV
536 && (mg = CORO_MAGIC_state (coro))
537 && mg->mg_virtual == &coro_state_vtbl
538 ))
539 return mg;
540
541 return 0;
542}
543
544ecb_inline struct coro *
545SvSTATE_ (pTHX_ SV *coro_sv)
546{
547 MAGIC *mg;
548
549 if (SvROK (coro_sv))
550 coro_sv = SvRV (coro_sv);
551
552 mg = SvSTATEhv_p (aTHX_ coro_sv);
553 if (!mg)
554 croak ("Coro::State object required");
555
556 return (struct coro *)mg->mg_ptr;
557}
558
559#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
560
561/* faster than SvSTATE, but expects a coroutine hv */
562#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
563#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
564
565/*****************************************************************************/
566/* padlist management and caching */
567
568ecb_inline PADLIST *
215coro_clone_padlist (pTHX_ CV *cv) 569coro_derive_padlist (pTHX_ CV *cv)
216{ 570{
217 AV *padlist = CvPADLIST (cv); 571 PADLIST *padlist = CvPADLIST (cv);
218 AV *newpadlist, *newpad; 572 PADLIST *newpadlist;
573 PADNAMELIST *padnames;
574 PAD *newpad;
575 PADOFFSET off = PadlistMAX (padlist) + 1;
219 576
220 newpadlist = newAV (); 577#if NEWPADAPI
578
579 /* if we had the original CvDEPTH, we might be able to steal the CvDEPTH+1 entry instead */
580 /* 20131102194744.GA6705@schmorp.de, 20131102195825.2013.qmail@lists-nntp.develooper.com */
581 while (!PadlistARRAY (padlist)[off - 1])
582 --off;
583
584 Perl_pad_push (aTHX_ padlist, off);
585
586 newpad = PadlistARRAY (padlist)[off];
587 PadlistARRAY (padlist)[off] = 0;
588
589#else
590
591#if PERL_VERSION_ATLEAST (5,10,0)
592 Perl_pad_push (aTHX_ padlist, off);
593#else
594 Perl_pad_push (aTHX_ padlist, off, 1);
595#endif
596
597 newpad = PadlistARRAY (padlist)[off];
598 PadlistMAX (padlist) = off - 1;
599
600#endif
601
602 newPADLIST (newpadlist);
603#if !PERL_VERSION_ATLEAST(5,15,3)
604 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
221 AvREAL_off (newpadlist); 605 AvREAL_off (newpadlist);
222#if PERL_VERSION_ATLEAST (5,9,0)
223 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
224#else
225 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
226#endif 606#endif
227 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
228 --AvFILLp (padlist);
229 607
230 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 608 /* Already extended to 2 elements by newPADLIST. */
231 av_store (newpadlist, 1, (SV *)newpad); 609 PadlistMAX (newpadlist) = 1;
610
611 padnames = PadlistNAMES (padlist);
612 ++PadnamelistREFCNT (padnames);
613 PadlistNAMES (newpadlist) = padnames;
614
615 PadlistARRAY (newpadlist)[1] = newpad;
232 616
233 return newpadlist; 617 return newpadlist;
234} 618}
235 619
236static void 620ecb_inline void
237free_padlist (pTHX_ AV *padlist) 621free_padlist (pTHX_ PADLIST *padlist)
238{ 622{
239 /* may be during global destruction */ 623 /* may be during global destruction */
240 if (SvREFCNT (padlist)) 624 if (!IN_DESTRUCT)
241 { 625 {
242 I32 i = AvFILLp (padlist); 626 I32 i = PadlistMAX (padlist);
243 while (i >= 0) 627
628 while (i > 0) /* special-case index 0 */
244 { 629 {
245 SV **svp = av_fetch (padlist, i--, FALSE); 630 /* we try to be extra-careful here */
631 PAD *pad = PadlistARRAY (padlist)[i--];
632
246 if (svp) 633 if (pad)
247 { 634 {
248 SV *sv; 635 I32 j = PadMAX (pad);
249 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 636
637 while (j >= 0)
250 SvREFCNT_dec (sv); 638 SvREFCNT_dec (PadARRAY (pad)[j--]);
251 639
640 PadMAX (pad) = -1;
252 SvREFCNT_dec (*svp); 641 SvREFCNT_dec (pad);
253 } 642 }
254 } 643 }
255 644
645 PadnamelistREFCNT_dec (PadlistNAMES (padlist));
646
647#if NEWPADAPI
648 Safefree (PadlistARRAY (padlist));
649 Safefree (padlist);
650#else
651 AvFILLp (padlist) = -1;
652 AvREAL_off (padlist);
256 SvREFCNT_dec ((SV*)padlist); 653 SvREFCNT_dec ((SV*)padlist);
654#endif
257 } 655 }
258} 656}
259 657
260static int 658static int
261coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 659coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
262{ 660{
263 AV *padlist; 661 PADLIST *padlist;
264 AV *av = (AV *)mg->mg_obj; 662 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
663 size_t len = *(size_t *)mg->mg_ptr;
265 664
266 /* casting is fun. */ 665 /* perl manages to free our internal AV and _then_ call us */
267 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 666 if (IN_DESTRUCT)
667 return 0;
668
669 while (len--)
268 free_padlist (aTHX_ padlist); 670 free_padlist (aTHX_ padlists[len]);
269
270 SvREFCNT_dec (av);
271 671
272 return 0; 672 return 0;
273} 673}
274 674
275#define PERL_MAGIC_coro PERL_MAGIC_ext 675static MGVTBL coro_cv_vtbl = {
276 676 0, 0, 0, 0,
277static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 677 coro_cv_free
278 678};
279#define CORO_MAGIC(cv) \
280 SvMAGIC (cv) \
281 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
282 ? SvMAGIC (cv) \
283 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
284 : 0
285 679
286/* the next two functions merely cache the padlists */ 680/* the next two functions merely cache the padlists */
287static void 681ecb_inline void
288get_padlist (pTHX_ CV *cv) 682get_padlist (pTHX_ CV *cv)
289{ 683{
290 MAGIC *mg = CORO_MAGIC (cv); 684 MAGIC *mg = CORO_MAGIC_cv (cv);
291 AV *av; 685 size_t *lenp;
292 686
293 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 687 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
294 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 688 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
295 else 689 else
296 { 690 {
297#if CORO_PREFER_PERL_FUNCTIONS 691#if CORO_PREFER_PERL_FUNCTIONS
298 /* this is probably cleaner, but also slower? */ 692 /* this is probably cleaner? but also slower! */
693 /* in practise, it seems to be less stable */
299 CV *cp = Perl_cv_clone (cv); 694 CV *cp = Perl_cv_clone (aTHX_ cv);
300 CvPADLIST (cv) = CvPADLIST (cp); 695 CvPADLIST (cv) = CvPADLIST (cp);
301 CvPADLIST (cp) = 0; 696 CvPADLIST (cp) = 0;
302 SvREFCNT_dec (cp); 697 SvREFCNT_dec (cp);
303#else 698#else
304 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 699 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
305#endif 700#endif
306 } 701 }
307} 702}
308 703
309static void 704ecb_inline void
310put_padlist (pTHX_ CV *cv) 705put_padlist (pTHX_ CV *cv)
311{ 706{
312 MAGIC *mg = CORO_MAGIC (cv); 707 MAGIC *mg = CORO_MAGIC_cv (cv);
313 AV *av;
314 708
315 if (!mg) 709 if (ecb_expect_false (!mg))
316 {
317 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
318 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
319 mg->mg_virtual = &vtbl_coro;
320 mg->mg_obj = (SV *)newAV ();
321 } 710 {
711 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
712 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
713 mg->mg_len = 1; /* so mg_free frees mg_ptr */
714 }
715 else
716 Renew (mg->mg_ptr,
717 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
718 char);
322 719
323 av = (AV *)mg->mg_obj; 720 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
324
325 if (AvFILLp (av) >= AvMAX (av))
326 av_extend (av, AvMAX (av) + 1);
327
328 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
329} 721}
330 722
331/** load & save, init *******************************************************/ 723/** load & save, init *******************************************************/
332 724
333#define SB do { 725ecb_inline void
334#define SE } while (0) 726swap_sv (SV *a, SV *b)
727{
728 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
729 SV tmp;
335 730
336#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE 731 /* swap sv_any */
732 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
733
734 /* swap sv_flags */
735 SvFLAGS (&tmp) = SvFLAGS (a);
736 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
737 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
738
739#if PERL_VERSION_ATLEAST (5,10,0)
740 /* perl 5.10 and later complicates this _quite_ a bit, but it also
741 * is much faster, so no quarrels here. alternatively, we could
742 * sv_upgrade to avoid this.
743 */
744 {
745 /* swap sv_u */
746 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
747
748 /* if SvANY points to the head, we need to adjust the pointers,
749 * as the pointer for a still points to b, and maybe vice versa.
750 */
751 U32 svany_in_head_set = (1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV);
752 #if NVSIZE <= IVSIZE && PERL_VERSION_ATLEAST(5,22,0)
753 svany_in_head_set |= 1 << SVt_NV;
754 #endif
755
756 #define svany_in_head(type) (svany_in_head_set & (1 << (type)))
757
758 if (svany_in_head (SvTYPE (a)))
759 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
760
761 if (svany_in_head (SvTYPE (b)))
762 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
763 }
764#endif
765}
766
767/* swap sv heads, at least logically */
768static void
769swap_svs_enter (pTHX_ Coro__State c)
770{
771 int i;
772
773 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
774 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
775}
776
777static void
778swap_svs_leave (pTHX_ Coro__State c)
779{
780 int i;
781
782 for (i = AvFILLp (c->swap_sv) - 1; i >= 0; i -= 2)
783 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
784}
785
786#define SWAP_SVS_ENTER(coro) \
787 if (ecb_expect_false ((coro)->swap_sv)) \
788 swap_svs_enter (aTHX_ (coro))
789
790#define SWAP_SVS_LEAVE(coro) \
791 if (ecb_expect_false ((coro)->swap_sv)) \
792 swap_svs_leave (aTHX_ (coro))
793
794static void
795on_enterleave_call (pTHX_ SV *cb);
337 796
338static void 797static void
339load_perl (pTHX_ Coro__State c) 798load_perl (pTHX_ Coro__State c)
340{ 799{
341#define VAR(name,type) PL_ ## name = c->name; 800 perl_slots *slot = c->slot;
801 c->slot = 0;
802
803 PL_mainstack = c->mainstack;
804
805#if CORO_JIT
806 load_perl_slots (slot);
807#else
808 #define VARx(name,expr,type) expr = slot->name;
342# include "state.h" 809 #include "state.h"
343#undef VAR 810#endif
344
345 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
346 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
347 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
348 if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
349
350 if (c->irssv)
351 {
352 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
353 {
354 SvREFCNT_dec (c->irssv);
355 c->irssv = 0;
356 }
357 else
358 {
359 REPLACE_SV (PL_rs, c->irssv);
360 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
361 sv_setsv (c->irssv_sv, PL_rs);
362 }
363 }
364 811
365 { 812 {
366 dSP; 813 dSP;
814
367 CV *cv; 815 CV *cv;
368 816
369 /* now do the ugly restore mess */ 817 /* now do the ugly restore mess */
370 while ((cv = (CV *)POPs)) 818 while (ecb_expect_true (cv = (CV *)POPs))
371 { 819 {
372 put_padlist (aTHX_ cv); /* mark this padlist as available */ 820 put_padlist (aTHX_ cv); /* mark this padlist as available */
373 CvDEPTH (cv) = PTR2IV (POPs); 821 CvDEPTH (cv) = PTR2IV (POPs);
374 CvPADLIST (cv) = (AV *)POPs; 822 CvPADLIST (cv) = (PADLIST *)POPs;
375 } 823 }
376 824
377 PUTBACK; 825 PUTBACK;
378 } 826 }
379 assert (!PL_comppad || AvARRAY (PL_comppad));//D 827
828 slf_frame = c->slf_frame;
829 CORO_THROW = c->except;
830
831 if (ecb_expect_false (enable_times))
832 {
833 if (ecb_expect_false (!times_valid))
834 coro_times_update ();
835
836 coro_times_sub (c);
837 }
838
839 if (ecb_expect_false (c->on_enter))
840 {
841 int i;
842
843 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
844 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
845 }
846
847 if (ecb_expect_false (c->on_enter_xs))
848 {
849 int i;
850
851 for (i = 0; i <= AvFILLp (c->on_enter_xs); i += 2)
852 ((coro_enterleave_hook)AvARRAY (c->on_enter_xs)[i]) (aTHX_ AvARRAY (c->on_enter_xs)[i + 1]);
853 }
854
855 SWAP_SVS_ENTER (c);
380} 856}
381 857
382static void 858static void
383save_perl (pTHX_ Coro__State c) 859save_perl (pTHX_ Coro__State c)
384{ 860{
385 assert (!PL_comppad || AvARRAY (PL_comppad));//D 861 SWAP_SVS_LEAVE (c);
862
863 if (ecb_expect_false (c->on_leave_xs))
864 {
865 int i;
866
867 for (i = AvFILLp (c->on_leave_xs) - 1; i >= 0; i -= 2)
868 ((coro_enterleave_hook)AvARRAY (c->on_leave_xs)[i]) (aTHX_ AvARRAY (c->on_leave_xs)[i + 1]);
869 }
870
871 if (ecb_expect_false (c->on_leave))
872 {
873 int i;
874
875 for (i = AvFILLp (c->on_leave); i >= 0; --i)
876 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
877 }
878
879 times_valid = 0;
880
881 if (ecb_expect_false (enable_times))
882 {
883 coro_times_update (); times_valid = 1;
884 coro_times_add (c);
885 }
886
887 c->except = CORO_THROW;
888 c->slf_frame = slf_frame;
889
386 { 890 {
387 dSP; 891 dSP;
388 I32 cxix = cxstack_ix; 892 I32 cxix = cxstack_ix;
389 PERL_CONTEXT *ccstk = cxstack; 893 PERL_CONTEXT *ccstk = cxstack;
390 PERL_SI *top_si = PL_curstackinfo; 894 PERL_SI *top_si = PL_curstackinfo;
… …
392 /* 896 /*
393 * the worst thing you can imagine happens first - we have to save 897 * the worst thing you can imagine happens first - we have to save
394 * (and reinitialize) all cv's in the whole callchain :( 898 * (and reinitialize) all cv's in the whole callchain :(
395 */ 899 */
396 900
397 EXTEND (SP, 3 + 1);
398 PUSHs (Nullsv); 901 XPUSHs (Nullsv);
399 /* this loop was inspired by pp_caller */ 902 /* this loop was inspired by pp_caller */
400 for (;;) 903 for (;;)
401 { 904 {
402 while (cxix >= 0) 905 while (ecb_expect_true (cxix >= 0))
403 { 906 {
404 PERL_CONTEXT *cx = &ccstk[cxix--]; 907 PERL_CONTEXT *cx = &ccstk[cxix--];
405 908
406 if (CxTYPE (cx) == CXt_SUB) 909 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
407 { 910 {
408 CV *cv = cx->blk_sub.cv; 911 CV *cv = cx->blk_sub.cv;
409 912
410 if (CvDEPTH (cv)) 913 if (ecb_expect_true (CvDEPTH (cv)))
411 { 914 {
412 EXTEND (SP, 3); 915 EXTEND (SP, 3);
413 PUSHs ((SV *)CvPADLIST (cv)); 916 PUSHs ((SV *)CvPADLIST (cv));
414 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 917 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
415 PUSHs ((SV *)cv); 918 PUSHs ((SV *)cv);
416 919
417 CvDEPTH (cv) = 0; 920 CvDEPTH (cv) = 0;
418 get_padlist (aTHX_ cv); 921 get_padlist (aTHX_ cv);
419 } 922 }
420 } 923 }
421 } 924 }
422 925
423 if (top_si->si_type == PERLSI_MAIN) 926 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
424 break; 927 break;
425 928
426 top_si = top_si->si_prev; 929 top_si = top_si->si_prev;
427 ccstk = top_si->si_cxstack; 930 ccstk = top_si->si_cxstack;
428 cxix = top_si->si_cxix; 931 cxix = top_si->si_cxix;
429 } 932 }
430 933
431 PUTBACK; 934 PUTBACK;
432 } 935 }
433 936
434 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 937 /* allocate some space on the context stack for our purposes */
435 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 938 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
436 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 939 {
437 c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0; 940 unsigned int i;
438 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
439 941
440#define VAR(name,type)c->name = PL_ ## name; 942 for (i = 0; i < SLOT_COUNT; ++i)
943 CXINC;
944
945 cxstack_ix -= SLOT_COUNT; /* undo allocation */
946 }
947
948 c->mainstack = PL_mainstack;
949
950 {
951 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
952
953#if CORO_JIT
954 save_perl_slots (slot);
955#else
956 #define VARx(name,expr,type) slot->name = expr;
441# include "state.h" 957 #include "state.h"
442#undef VAR 958#endif
959 }
443} 960}
444 961
445/* 962/*
446 * allocate various perl stacks. This is an exact copy 963 * allocate various perl stacks. This is almost an exact copy
447 * of perl.c:init_stacks, except that it uses less memory 964 * of perl.c:init_stacks, except that it uses less memory
448 * on the (sometimes correct) assumption that coroutines do 965 * on the (sometimes correct) assumption that coroutines do
449 * not usually need a lot of stackspace. 966 * not usually need a lot of stackspace.
450 */ 967 */
451#if CORO_PREFER_PERL_FUNCTIONS 968#if CORO_PREFER_PERL_FUNCTIONS
452# define coro_init_stacks init_stacks 969# define coro_init_stacks(thx) init_stacks ()
453#else 970#else
454static void 971static void
455coro_init_stacks (pTHX) 972coro_init_stacks (pTHX)
456{ 973{
457 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 974 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
458 PL_curstackinfo->si_type = PERLSI_MAIN; 975 PL_curstackinfo->si_type = PERLSI_MAIN;
459 PL_curstack = PL_curstackinfo->si_stack; 976 PL_curstack = PL_curstackinfo->si_stack;
460 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 977 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
461 978
462 PL_stack_base = AvARRAY(PL_curstack); 979 PL_stack_base = AvARRAY(PL_curstack);
463 PL_stack_sp = PL_stack_base; 980 PL_stack_sp = PL_stack_base;
464 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 981 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
465 982
466 New(50,PL_tmps_stack,128,SV*); 983 New(50,PL_tmps_stack,32,SV*);
467 PL_tmps_floor = -1; 984 PL_tmps_floor = -1;
468 PL_tmps_ix = -1; 985 PL_tmps_ix = -1;
469 PL_tmps_max = 128; 986 PL_tmps_max = 32;
470 987
471 New(54,PL_markstack,32,I32); 988 New(54,PL_markstack,16,I32);
472 PL_markstack_ptr = PL_markstack; 989 PL_markstack_ptr = PL_markstack;
473 PL_markstack_max = PL_markstack + 32; 990 PL_markstack_max = PL_markstack + 16;
474 991
475#ifdef SET_MARK_OFFSET 992#ifdef SET_MARK_OFFSET
476 SET_MARK_OFFSET; 993 SET_MARK_OFFSET;
477#endif 994#endif
478 995
479 New(54,PL_scopestack,32,I32); 996 New(54,PL_scopestack,8,I32);
480 PL_scopestack_ix = 0; 997 PL_scopestack_ix = 0;
481 PL_scopestack_max = 32; 998 PL_scopestack_max = 8;
999#if HAS_SCOPESTACK_NAME
1000 New(54,PL_scopestack_name,8,const char*);
1001#endif
482 1002
483 New(54,PL_savestack,64,ANY); 1003 New(54,PL_savestack,24,ANY);
484 PL_savestack_ix = 0; 1004 PL_savestack_ix = 0;
485 PL_savestack_max = 64; 1005 PL_savestack_max = 24;
1006#if PERL_VERSION_ATLEAST (5,24,0)
1007 /* perl 5.24 moves SS_MAXPUSH optimisation from */
1008 /* the header macros to PL_savestack_max */
1009 PL_savestack_max -= SS_MAXPUSH;
1010#endif
486 1011
487#if !PERL_VERSION_ATLEAST (5,9,0) 1012#if !PERL_VERSION_ATLEAST (5,10,0)
488 New(54,PL_retstack,16,OP*); 1013 New(54,PL_retstack,4,OP*);
489 PL_retstack_ix = 0; 1014 PL_retstack_ix = 0;
490 PL_retstack_max = 16; 1015 PL_retstack_max = 4;
491#endif 1016#endif
492} 1017}
493#endif 1018#endif
494 1019
495/* 1020/*
496 * destroy the stacks, the callchain etc... 1021 * destroy the stacks, the callchain etc...
497 */ 1022 */
498static void 1023static void
499coro_destroy_stacks (pTHX) 1024coro_destruct_stacks (pTHX)
500{ 1025{
501 if (!IN_DESTRUCT)
502 {
503 /* restore all saved variables and stuff */
504 LEAVE_SCOPE (0);
505 assert (PL_tmps_floor == -1);
506
507 /* free all temporaries */
508 FREETMPS;
509 assert (PL_tmps_ix == -1);
510
511 /* unwind all extra stacks */
512 POPSTACK_TO (PL_mainstack);
513
514 /* unwind main stack */
515 dounwind (-1);
516 }
517
518 while (PL_curstackinfo->si_next) 1026 while (PL_curstackinfo->si_next)
519 PL_curstackinfo = PL_curstackinfo->si_next; 1027 PL_curstackinfo = PL_curstackinfo->si_next;
520 1028
521 while (PL_curstackinfo) 1029 while (PL_curstackinfo)
522 { 1030 {
… …
531 } 1039 }
532 1040
533 Safefree (PL_tmps_stack); 1041 Safefree (PL_tmps_stack);
534 Safefree (PL_markstack); 1042 Safefree (PL_markstack);
535 Safefree (PL_scopestack); 1043 Safefree (PL_scopestack);
1044#if HAS_SCOPESTACK_NAME
1045 Safefree (PL_scopestack_name);
1046#endif
536 Safefree (PL_savestack); 1047 Safefree (PL_savestack);
537#if !PERL_VERSION_ATLEAST (5,9,0) 1048#if !PERL_VERSION_ATLEAST (5,10,0)
538 Safefree (PL_retstack); 1049 Safefree (PL_retstack);
539#endif 1050#endif
540} 1051}
541 1052
1053#define CORO_RSS \
1054 rss += sizeof (SYM (curstackinfo)); \
1055 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
1056 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
1057 rss += SYM (tmps_max) * sizeof (SV *); \
1058 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
1059 rss += SYM (scopestack_max) * sizeof (I32); \
1060 rss += SYM (savestack_max) * sizeof (ANY);
1061
1062static size_t
1063coro_rss (pTHX_ struct coro *coro)
1064{
1065 size_t rss = sizeof (*coro);
1066
1067 if (coro->mainstack)
1068 {
1069 if (coro->flags & CF_RUNNING)
1070 {
1071 #define SYM(sym) PL_ ## sym
1072 CORO_RSS;
1073 #undef SYM
1074 }
1075 else
1076 {
1077 #define SYM(sym) coro->slot->sym
1078 CORO_RSS;
1079 #undef SYM
1080 }
1081 }
1082
1083 return rss;
1084}
1085
1086/** provide custom get/set/clear methods for %SIG elements ******************/
1087
1088/* apparently < 5.8.8 */
1089#ifndef MgPV_nolen_const
1090#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
1091 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
1092 (const char*)(mg)->mg_ptr)
1093#endif
1094
1095/* this will be a patched copy of PL_vtbl_sigelem */
1096static MGVTBL coro_sigelem_vtbl;
1097
1098static int ecb_cold
1099coro_sig_copy (pTHX_ SV *sv, MAGIC *mg, SV *nsv, const char *name, I32 namlen)
1100{
1101 char *key = SvPV_nolen ((SV *)name);
1102
1103 /* do what mg_copy normally does */
1104 sv_magic (nsv, mg->mg_obj, PERL_MAGIC_sigelem, name, namlen);
1105 assert (mg_find (nsv, PERL_MAGIC_sigelem)->mg_virtual == &PL_vtbl_sigelem);
1106
1107 /* patch sigelem vtbl, but only for __WARN__ and __DIE__ */
1108 if (*key == '_'
1109 && (strEQ (key, "__DIE__")
1110 || strEQ (key, "__WARN__")))
1111 mg_find (nsv, PERL_MAGIC_sigelem)->mg_virtual = &coro_sigelem_vtbl;
1112
1113 return 1;
1114}
1115
1116/* perl does not have a %SIG vtbl, we provide one so we can override */
1117/* the magic vtbl for the __DIE__ and __WARN__ members */
1118static const MGVTBL coro_sig_vtbl = {
1119 0, 0, 0, 0, 0,
1120 coro_sig_copy
1121};
1122
1123/*
1124 * This overrides the default magic get method of %SIG elements.
1125 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
1126 * and instead of trying to save and restore the hash elements (extremely slow),
1127 * we just provide our own readback here.
1128 */
1129static int ecb_cold
1130coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
1131{
1132 const char *s = MgPV_nolen_const (mg);
1133 /* the key must be either __DIE__ or __WARN__ here */
1134 SV **svp = s[2] == 'D' ? &PL_diehook : &PL_warnhook;
1135
1136 SV *ssv;
1137
1138 if (!*svp)
1139 ssv = &PL_sv_undef;
1140 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1141 ssv = sv_2mortal (newRV_inc (*svp));
1142 else
1143 ssv = *svp;
1144
1145 sv_setsv (sv, ssv);
1146 return 0;
1147}
1148
1149static int ecb_cold
1150coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1151{
1152 const char *s = MgPV_nolen_const (mg);
1153 /* the key must be either __DIE__ or __WARN__ here */
1154 SV **svp = s[2] == 'D' ? &PL_diehook : &PL_warnhook;
1155
1156 SV *old = *svp;
1157 *svp = 0;
1158 SvREFCNT_dec (old);
1159 return 0;
1160}
1161
1162static int ecb_cold
1163coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1164{
1165 const char *s = MgPV_nolen_const (mg);
1166 /* the key must be either __DIE__ or __WARN__ here */
1167 SV **svp = s[2] == 'D' ? &PL_diehook : &PL_warnhook;
1168
1169 SV *old = *svp;
1170 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1171 SvREFCNT_dec (old);
1172 return 0;
1173}
1174
1175static void
1176prepare_nop (pTHX_ struct coro_transfer_args *ta)
1177{
1178 /* kind of mega-hacky, but works */
1179 ta->next = ta->prev = (struct coro *)ta;
1180}
1181
1182static int
1183slf_check_nop (pTHX_ struct CoroSLF *frame)
1184{
1185 return 0;
1186}
1187
1188static int
1189slf_check_repeat (pTHX_ struct CoroSLF *frame)
1190{
1191 return 1;
1192}
1193
542/** coroutine stack handling ************************************************/ 1194/** coroutine stack handling ************************************************/
543 1195
544static void 1196static UNOP init_perl_op;
1197
1198ecb_noinline static void /* noinline to keep it out of the transfer fast path */
545setup_coro (pTHX_ struct coro *coro) 1199init_perl (pTHX_ struct coro *coro)
546{ 1200{
547 /* 1201 /*
548 * emulate part of the perl startup here. 1202 * emulate part of the perl startup here.
549 */ 1203 */
550 coro_init_stacks (aTHX); 1204 coro_init_stacks (aTHX);
551 1205
1206 PL_runops = RUNOPS_DEFAULT;
552 PL_curcop = &PL_compiling; 1207 PL_curcop = &PL_compiling;
553 PL_in_eval = EVAL_NULL; 1208 PL_in_eval = EVAL_NULL;
554 PL_comppad = 0; 1209 PL_comppad = 0;
1210 PL_comppad_name = 0;
1211 PL_comppad_name_fill = 0;
1212 PL_comppad_name_floor = 0;
555 PL_curpm = 0; 1213 PL_curpm = 0;
1214 PL_curpad = 0;
556 PL_localizing = 0; 1215 PL_localizing = 0;
557 PL_dirty = 0;
558 PL_restartop = 0; 1216 PL_restartop = 0;
1217#if PERL_VERSION_ATLEAST (5,10,0)
1218 PL_parser = 0;
1219#endif
1220 PL_hints = 0;
1221
1222 /* recreate the die/warn hooks */
1223 PL_diehook = SvREFCNT_inc (rv_diehook);
1224 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1225
1226 GvSV (PL_defgv) = newSV (0);
1227 GvAV (PL_defgv) = coro->args; coro->args = 0;
1228 GvSV (PL_errgv) = newSV (0);
1229 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1230 GvHV (PL_hintgv) = newHV ();
1231#if PERL_VERSION_ATLEAST (5,10,0)
1232 hv_magic (GvHV (PL_hintgv), 0, PERL_MAGIC_hints);
1233#endif
1234 PL_rs = newSVsv (GvSV (irsgv));
1235 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
559 1236
560 { 1237 {
561 dSP; 1238 dSP;
562 LOGOP myop; 1239 UNOP myop;
563 1240
564 SvREFCNT_dec (GvAV (PL_defgv));
565 GvAV (PL_defgv) = coro->args; coro->args = 0;
566
567 Zero (&myop, 1, LOGOP); 1241 Zero (&myop, 1, UNOP);
568 myop.op_next = Nullop; 1242 myop.op_next = Nullop;
1243 myop.op_type = OP_ENTERSUB;
569 myop.op_flags = OPf_WANT_VOID; 1244 myop.op_flags = OPf_WANT_VOID;
570 1245
571 PUSHMARK (SP); 1246 PUSHMARK (SP);
572 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE)); 1247 XPUSHs ((SV *)coro->startcv);
573 PUTBACK; 1248 PUTBACK;
574 PL_op = (OP *)&myop; 1249 PL_op = (OP *)&myop;
575 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1250 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
576 SPAGAIN;
577 } 1251 }
578 1252
579 ENTER; /* necessary e.g. for dounwind */ 1253 /* this newly created coroutine might be run on an existing cctx which most
580} 1254 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1255 */
1256 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1257 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1258 slf_frame.destroy = 0;
581 1259
1260 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1261 init_perl_op.op_next = PL_op;
1262 init_perl_op.op_type = OP_ENTERSUB;
1263 init_perl_op.op_ppaddr = pp_slf;
1264 /* no flags etc. required, as an init function won't be called */
1265
1266 PL_op = (OP *)&init_perl_op;
1267
1268 /* copy throw, in case it was set before init_perl */
1269 CORO_THROW = coro->except;
1270
1271 SWAP_SVS_ENTER (coro);
1272
1273 if (ecb_expect_false (enable_times))
1274 {
1275 coro_times_update ();
1276 coro_times_sub (coro);
1277 }
1278}
1279
582static void 1280static void
1281coro_unwind_stacks (pTHX)
1282{
1283 if (!IN_DESTRUCT)
1284 {
1285 /* restore all saved variables and stuff */
1286 LEAVE_SCOPE (0);
1287 assert (PL_tmps_floor == -1);
1288
1289 /* free all temporaries */
1290 FREETMPS;
1291 assert (PL_tmps_ix == -1);
1292
1293 /* unwind all extra stacks */
1294 POPSTACK_TO (PL_mainstack);
1295
1296 /* unwind main stack */
1297 dounwind (-1);
1298 }
1299}
1300
1301static void
1302destroy_perl (pTHX_ struct coro *coro)
1303{
1304 SV *svf [9];
1305
1306 {
1307 SV *old_current = SvRV (coro_current);
1308 struct coro *current = SvSTATE (old_current);
1309
1310 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1311
1312 save_perl (aTHX_ current);
1313
1314 /* this will cause transfer_check to croak on block*/
1315 SvRV_set (coro_current, (SV *)coro->hv);
1316
1317 load_perl (aTHX_ coro);
1318
1319 /* restore swapped sv's */
1320 SWAP_SVS_LEAVE (coro);
1321
1322 coro_unwind_stacks (aTHX);
1323
1324 coro_destruct_stacks (aTHX);
1325
1326 /* now save some sv's to be free'd later */
1327 svf [0] = GvSV (PL_defgv);
1328 svf [1] = (SV *)GvAV (PL_defgv);
1329 svf [2] = GvSV (PL_errgv);
1330 svf [3] = (SV *)PL_defoutgv;
1331 svf [4] = PL_rs;
1332 svf [5] = GvSV (irsgv);
1333 svf [6] = (SV *)GvHV (PL_hintgv);
1334 svf [7] = PL_diehook;
1335 svf [8] = PL_warnhook;
1336 assert (9 == sizeof (svf) / sizeof (*svf));
1337
1338 SvRV_set (coro_current, old_current);
1339
1340 load_perl (aTHX_ current);
1341 }
1342
1343 {
1344 unsigned int i;
1345
1346 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1347 SvREFCNT_dec (svf [i]);
1348
1349 SvREFCNT_dec (coro->saved_deffh);
1350 SvREFCNT_dec (coro->rouse_cb);
1351 SvREFCNT_dec (coro->invoke_cb);
1352 SvREFCNT_dec (coro->invoke_av);
1353 SvREFCNT_dec (coro->on_enter_xs);
1354 SvREFCNT_dec (coro->on_leave_xs);
1355 }
1356}
1357
1358ecb_inline void
583free_coro_mortal (pTHX) 1359free_coro_mortal (pTHX)
584{ 1360{
585 if (coro_mortal) 1361 if (ecb_expect_true (coro_mortal))
586 { 1362 {
587 SvREFCNT_dec (coro_mortal); 1363 SvREFCNT_dec ((SV *)coro_mortal);
588 coro_mortal = 0; 1364 coro_mortal = 0;
589 } 1365 }
590} 1366}
591 1367
592/* inject a fake call to Coro::State::_cctx_init into the execution */ 1368static int
593/* _cctx_init shoukld be careful, as it could be called at almost any time */ 1369runops_trace (pTHX)
594/* during execution of a pelr program */
595static void NOINLINE
596prepare_cctx (pTHX_ coro_cctx *cctx)
597{ 1370{
598 dSP; 1371 COP *oldcop = 0;
599 LOGOP myop; 1372 int oldcxix = -2;
600 1373
601 Zero (&myop, 1, LOGOP); 1374 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
602 myop.op_next = PL_op; 1375 {
603 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1376 PERL_ASYNC_CHECK ();
604 1377
605 PUSHMARK (SP); 1378 if (cctx_current->flags & CC_TRACE_ALL)
606 EXTEND (SP, 2); 1379 {
607 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1380 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
608 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1381 {
609 PUTBACK; 1382 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
610 PL_op = (OP *)&myop; 1383 SV **bot, **top;
611 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1384 AV *av = newAV (); /* return values */
612 SPAGAIN; 1385 SV **cb;
1386 dSP;
1387
1388 GV *gv = CvGV (cx->blk_sub.cv);
1389 SV *fullname = sv_2mortal (newSV (0));
1390 if (isGV (gv))
1391 gv_efullname3 (fullname, gv, 0);
1392
1393 bot = PL_stack_base + cx->blk_oldsp + 1;
1394 top = cx->blk_gimme == G_ARRAY ? SP + 1
1395 : cx->blk_gimme == G_SCALAR ? bot + 1
1396 : bot;
1397
1398 av_extend (av, top - bot);
1399 while (bot < top)
1400 av_push (av, SvREFCNT_inc_NN (*bot++));
1401
1402 PL_runops = RUNOPS_DEFAULT;
1403 ENTER;
1404 SAVETMPS;
1405 PUSHMARK (SP);
1406 EXTEND (SP, 3);
1407 PUSHs (&PL_sv_no);
1408 PUSHs (fullname);
1409 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1410 PUTBACK;
1411 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1412 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1413 SPAGAIN;
1414 FREETMPS;
1415 LEAVE;
1416 PL_runops = runops_trace;
1417 }
1418
1419 if (oldcop != PL_curcop)
1420 {
1421 oldcop = PL_curcop;
1422
1423 if (PL_curcop != &PL_compiling)
1424 {
1425 SV **cb;
1426
1427 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB && cxstack_ix >= 0)
1428 {
1429 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1430
1431 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1432 {
1433 dSP;
1434 GV *gv = CvGV (cx->blk_sub.cv);
1435 SV *fullname = sv_2mortal (newSV (0));
1436
1437 if (isGV (gv))
1438 gv_efullname3 (fullname, gv, 0);
1439
1440 PL_runops = RUNOPS_DEFAULT;
1441 ENTER;
1442 SAVETMPS;
1443 PUSHMARK (SP);
1444 EXTEND (SP, 3);
1445 PUSHs (&PL_sv_yes);
1446 PUSHs (fullname);
1447 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc (SUB_ARGARRAY)) : &PL_sv_undef);
1448 PUTBACK;
1449 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1450 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1451 SPAGAIN;
1452 FREETMPS;
1453 LEAVE;
1454 PL_runops = runops_trace;
1455 }
1456
1457 oldcxix = cxstack_ix;
1458 }
1459
1460 if (cctx_current->flags & CC_TRACE_LINE)
1461 {
1462 dSP;
1463
1464 PL_runops = RUNOPS_DEFAULT;
1465 ENTER;
1466 SAVETMPS;
1467 PUSHMARK (SP);
1468 EXTEND (SP, 2);
1469 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1470 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1471 PUTBACK;
1472 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1473 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1474 SPAGAIN;
1475 FREETMPS;
1476 LEAVE;
1477 PL_runops = runops_trace;
1478 }
1479 }
1480 }
1481 }
1482 }
1483
1484 TAINT_NOT;
1485 return 0;
1486}
1487
1488static struct CoroSLF cctx_ssl_frame;
1489
1490static void
1491slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1492{
1493 ta->prev = 0;
1494}
1495
1496static int
1497slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1498{
1499 *frame = cctx_ssl_frame;
1500
1501 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1502}
1503
1504/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1505static void ecb_noinline
1506cctx_prepare (pTHX)
1507{
1508 PL_top_env = &PL_start_env;
1509
1510 if (cctx_current->flags & CC_TRACE)
1511 PL_runops = runops_trace;
1512
1513 /* we already must be executing an SLF op, there is no other valid way
1514 * that can lead to creation of a new cctx */
1515 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1516 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1517
1518 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1519 cctx_ssl_frame = slf_frame;
1520
1521 slf_frame.prepare = slf_prepare_set_stacklevel;
1522 slf_frame.check = slf_check_set_stacklevel;
1523}
1524
1525/* the tail of transfer: execute stuff we can only do after a transfer */
1526ecb_inline void
1527transfer_tail (pTHX)
1528{
1529 free_coro_mortal (aTHX);
1530}
1531
1532/* try to exit the same way perl's main function would do */
1533/* we do not bother resetting the environment or other things *7
1534/* that are not, uhm, essential */
1535/* this obviously also doesn't work when perl is embedded */
1536static void ecb_noinline ecb_cold
1537perlish_exit (pTHX)
1538{
1539 int exitstatus = perl_destruct (PL_curinterp);
1540 perl_free (PL_curinterp);
1541 exit (exitstatus);
613} 1542}
614 1543
615/* 1544/*
616 * this is a _very_ stripped down perl interpreter ;) 1545 * this is a _very_ stripped down perl interpreter ;)
617 */ 1546 */
618static void 1547static void
619coro_run (void *arg) 1548cctx_run (void *arg)
620{ 1549{
1550#ifdef USE_ITHREADS
1551# if CORO_PTHREAD
1552 PERL_SET_CONTEXT (coro_thx);
1553# endif
1554#endif
1555 {
621 dTHX; 1556 dTHX;
622 1557
623 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1558 /* normally we would need to skip the entersub here */
624 UNLOCK; 1559 /* not doing so will re-execute it, which is exactly what we want */
1560 /* PL_nop = PL_nop->op_next */
625 1561
626 PL_top_env = &PL_start_env;
627
628 /* inject a fake subroutine call to cctx_init */ 1562 /* inject a fake subroutine call to cctx_init */
629 prepare_cctx (aTHX_ (coro_cctx *)arg); 1563 cctx_prepare (aTHX);
630 1564
1565 /* cctx_run is the alternative tail of transfer() */
1566 transfer_tail (aTHX);
1567
631 /* somebody or something will hit me for both perl_run and PL_restartop */ 1568 /* somebody or something will hit me for both perl_run and PL_restartop */
632 PL_restartop = PL_op; 1569 PL_restartop = PL_op;
633 perl_run (PL_curinterp); 1570 perl_run (PL_curinterp);
1571 /*
1572 * Unfortunately, there is no way to get at the return values of the
1573 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1574 * runtime errors here, as this is just a random interpreter, not a thread.
1575 */
634 1576
1577 /*
1578 * pp_entersub in 5.24 no longer ENTERs, but perl_destruct
1579 * requires PL_scopestack_ix, so do it here if required.
1580 */
1581 if (!PL_scopestack_ix)
1582 ENTER;
1583
1584 /*
635 /* If perl-run returns we assume exit() was being called, which */ 1585 * If perl-run returns we assume exit() was being called or the coro
636 /* seems to be the only valid (non-bug) reason for perl_run to return. */ 1586 * fell off the end, which seems to be the only valid (non-bug)
637 /* We try to exit by jumping to the bootstrap-time "top" top_env, as */ 1587 * reason for perl_run to return. We try to mimic whatever perl is normally
638 /* we cannot restore the "main" coroutine as Coro has no such concept */ 1588 * doing in that case. YMMV.
639 PL_top_env = main_top_env; 1589 */
640 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1590 perlish_exit (aTHX);
1591 }
641} 1592}
642 1593
643static coro_cctx * 1594static coro_cctx *
644cctx_new () 1595cctx_new (void)
645{ 1596{
646 coro_cctx *cctx; 1597 coro_cctx *cctx;
647 void *stack_start;
648 size_t stack_size;
649 1598
650 ++cctx_count; 1599 ++cctx_count;
651
652 Newz (0, cctx, 1, coro_cctx); 1600 New (0, cctx, 1, coro_cctx);
653 1601
654#if HAVE_MMAP 1602 cctx->gen = cctx_gen;
1603 cctx->flags = 0;
1604 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
655 1605
656 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1606 return cctx;
657 /* mmap supposedly does allocate-on-write for us */ 1607}
658 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
659 1608
660 if (cctx->sptr != (void *)-1) 1609/* create a new cctx only suitable as source */
661 { 1610static coro_cctx *
662# if CORO_STACKGUARD 1611cctx_new_empty (void)
663 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1612{
664# endif 1613 coro_cctx *cctx = cctx_new ();
665 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1614
666 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1615 cctx->stack.sptr = 0;
667 cctx->mapped = 1; 1616 coro_create (&cctx->cctx, 0, 0, 0, 0);
1617
1618 return cctx;
1619}
1620
1621/* create a new cctx suitable as destination/running a perl interpreter */
1622static coro_cctx *
1623cctx_new_run (void)
1624{
1625 coro_cctx *cctx = cctx_new ();
1626
1627 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
668 } 1628 {
669 else
670#endif
671 {
672 cctx->ssize = coro_stacksize * (long)sizeof (long);
673 New (0, cctx->sptr, coro_stacksize, long);
674
675 if (!cctx->sptr)
676 {
677 perror ("FATAL: unable to allocate stack for coroutine"); 1629 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
678 _exit (EXIT_FAILURE); 1630 _exit (EXIT_FAILURE);
679 }
680
681 stack_start = cctx->sptr;
682 stack_size = cctx->ssize;
683 } 1631 }
684 1632
685 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
686 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1633 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
687 1634
688 return cctx; 1635 return cctx;
689} 1636}
690 1637
691static void 1638static void
692cctx_destroy (coro_cctx *cctx) 1639cctx_destroy (coro_cctx *cctx)
693{ 1640{
694 if (!cctx) 1641 if (!cctx)
695 return; 1642 return;
696 1643
1644 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1645
697 --cctx_count; 1646 --cctx_count;
1647 coro_destroy (&cctx->cctx);
698 1648
699#if CORO_USE_VALGRIND 1649 coro_stack_free (&cctx->stack);
700 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
701#endif
702
703#if HAVE_MMAP
704 if (cctx->mapped)
705 munmap (cctx->sptr, cctx->ssize);
706 else
707#endif
708 Safefree (cctx->sptr);
709 1650
710 Safefree (cctx); 1651 Safefree (cctx);
711} 1652}
1653
1654/* wether this cctx should be destructed */
1655#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
712 1656
713static coro_cctx * 1657static coro_cctx *
714cctx_get (pTHX) 1658cctx_get (pTHX)
715{ 1659{
716 while (cctx_first) 1660 while (ecb_expect_true (cctx_first))
717 { 1661 {
718 coro_cctx *cctx = cctx_first; 1662 coro_cctx *cctx = cctx_first;
719 cctx_first = cctx->next; 1663 cctx_first = cctx->next;
720 --cctx_idle; 1664 --cctx_idle;
721 1665
722 if (cctx->ssize >= coro_stacksize) 1666 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
723 return cctx; 1667 return cctx;
724 1668
725 cctx_destroy (cctx); 1669 cctx_destroy (cctx);
726 } 1670 }
727 1671
728 PL_op = PL_op->op_next;
729 return cctx_new (); 1672 return cctx_new_run ();
730} 1673}
731 1674
732static void 1675static void
733cctx_put (coro_cctx *cctx) 1676cctx_put (coro_cctx *cctx)
734{ 1677{
1678 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1679
735 /* free another cctx if overlimit */ 1680 /* free another cctx if overlimit */
736 if (cctx_idle >= MAX_IDLE_CCTX) 1681 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
737 { 1682 {
738 coro_cctx *first = cctx_first; 1683 coro_cctx *first = cctx_first;
739 cctx_first = first->next; 1684 cctx_first = first->next;
740 --cctx_idle; 1685 --cctx_idle;
741 1686
742 assert (!first->inuse);
743 cctx_destroy (first); 1687 cctx_destroy (first);
744 } 1688 }
745 1689
746 ++cctx_idle; 1690 ++cctx_idle;
747 cctx->next = cctx_first; 1691 cctx->next = cctx_first;
748 cctx_first = cctx; 1692 cctx_first = cctx;
749} 1693}
750 1694
751/** coroutine switching *****************************************************/ 1695/** coroutine switching *****************************************************/
752 1696
753/* never call directly, always through the coro_state_transfer global variable */ 1697static void
754static void NOINLINE
755transfer (pTHX_ struct coro *prev, struct coro *next) 1698transfer_check (pTHX_ struct coro *prev, struct coro *next)
1699{
1700 /* TODO: throwing up here is considered harmful */
1701
1702 if (ecb_expect_true (prev != next))
1703 {
1704 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1705 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1706
1707 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1708 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1709
1710#if !PERL_VERSION_ATLEAST (5,10,0)
1711 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1712 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1713#endif
1714 }
1715}
1716
1717/* always use the TRANSFER macro */
1718static void ecb_noinline /* noinline so we have a fixed stackframe */
1719transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
756{ 1720{
757 dSTACKLEVEL; 1721 dSTACKLEVEL;
758 1722
759 /* sometimes transfer is only called to set idle_sp */ 1723 /* sometimes transfer is only called to set idle_sp */
760 if (!next) 1724 if (ecb_expect_false (!prev))
761 { 1725 {
762 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1726 cctx_current->idle_sp = STACKLEVEL;
763 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1727 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
764 }
765 else if (prev != next)
766 { 1728 }
1729 else if (ecb_expect_true (prev != next))
1730 {
767 coro_cctx *prev__cctx; 1731 coro_cctx *cctx_prev;
768 1732
769 if (prev->flags & CF_NEW) 1733 if (ecb_expect_false (prev->flags & CF_NEW))
770 { 1734 {
771 /* create a new empty context */ 1735 /* create a new empty/source context */
772 Newz (0, prev->cctx, 1, coro_cctx);
773 prev->cctx->inuse = 1;
774 prev->flags &= ~CF_NEW; 1736 prev->flags &= ~CF_NEW;
775 prev->flags |= CF_RUNNING; 1737 prev->flags |= CF_RUNNING;
776 } 1738 }
777 1739
778 /*TODO: must not croak here */
779 if (!prev->flags & CF_RUNNING)
780 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
781
782 if (next->flags & CF_RUNNING)
783 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
784
785 if (next->flags & CF_DESTROYED)
786 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
787
788 prev->flags &= ~CF_RUNNING; 1740 prev->flags &= ~CF_RUNNING;
789 next->flags |= CF_RUNNING; 1741 next->flags |= CF_RUNNING;
790 1742
791 LOCK; 1743 /* first get rid of the old state */
1744 save_perl (aTHX_ prev);
792 1745
793 if (next->flags & CF_NEW) 1746 if (ecb_expect_false (next->flags & CF_NEW))
794 { 1747 {
795 /* need to start coroutine */ 1748 /* need to start coroutine */
796 next->flags &= ~CF_NEW; 1749 next->flags &= ~CF_NEW;
797 /* first get rid of the old state */
798 save_perl (aTHX_ prev);
799 /* setup coroutine call */ 1750 /* setup coroutine call */
800 setup_coro (aTHX_ next); 1751 init_perl (aTHX_ next);
801 /* need a new stack */
802 assert (!next->cctx);
803 } 1752 }
804 else 1753 else
1754 load_perl (aTHX_ next);
1755
1756 /* possibly untie and reuse the cctx */
1757 if (ecb_expect_true (
1758 cctx_current->idle_sp == STACKLEVEL
1759 && !(cctx_current->flags & CC_TRACE)
1760 && !force_cctx
1761 ))
805 { 1762 {
806 /* coroutine already started */ 1763 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
807 save_perl (aTHX_ prev); 1764 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
808 load_perl (aTHX_ next); 1765
1766 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1767 /* without this the next cctx_get might destroy the running cctx while still in use */
1768 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1769 if (ecb_expect_true (!next->cctx))
1770 next->cctx = cctx_get (aTHX);
1771
1772 cctx_put (cctx_current);
809 } 1773 }
1774 else
1775 prev->cctx = cctx_current;
810 1776
811 prev__cctx = prev->cctx; 1777 ++next->usecount;
812 1778
813 /* possibly "free" the cctx */ 1779 cctx_prev = cctx_current;
814 if (prev__cctx->idle_sp == STACKLEVEL) 1780 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1781
1782 next->cctx = 0;
1783
1784 if (ecb_expect_false (cctx_prev != cctx_current))
815 { 1785 {
816 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1786 cctx_prev->top_env = PL_top_env;
817 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1787 PL_top_env = cctx_current->top_env;
818 1788 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
819 prev->cctx = 0;
820
821 cctx_put (prev__cctx);
822 prev__cctx->inuse = 0;
823 } 1789 }
824 1790
825 if (!next->cctx) 1791 transfer_tail (aTHX);
826 {
827 next->cctx = cctx_get (aTHX);
828 assert (!next->cctx->inuse);
829 next->cctx->inuse = 1;
830 }
831
832 if (prev__cctx != next->cctx)
833 {
834 prev__cctx->top_env = PL_top_env;
835 PL_top_env = next->cctx->top_env;
836 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
837 }
838
839 free_coro_mortal (aTHX);
840 UNLOCK;
841 } 1792 }
842} 1793}
843 1794
844struct transfer_args 1795#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
845{
846 struct coro *prev, *next;
847};
848
849#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1796#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
850 1797
851/** high level stuff ********************************************************/ 1798/** high level stuff ********************************************************/
852 1799
1800/* this function is actually Coro, not Coro::State, but we call it from here */
1801/* because it is convenient - but it hasn't been declared yet for that reason */
853static int 1802static void
1803coro_call_on_destroy (pTHX_ struct coro *coro);
1804
1805static void
854coro_state_destroy (pTHX_ struct coro *coro) 1806coro_state_destroy (pTHX_ struct coro *coro)
855{ 1807{
856 if (coro->flags & CF_DESTROYED) 1808 if (coro->flags & CF_ZOMBIE)
857 return 0; 1809 return;
858 1810
1811 slf_destroy (aTHX_ coro);
1812
859 coro->flags |= CF_DESTROYED; 1813 coro->flags |= CF_ZOMBIE;
860 1814
861 if (coro->flags & CF_READY) 1815 if (coro->flags & CF_READY)
862 { 1816 {
863 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1817 /* reduce nready, as destroying a ready coro effectively unreadies it */
864 /* alternative: look through all ready queues and remove the coro */ 1818 /* alternative: look through all ready queues and remove the coro */
865 LOCK;
866 --coro_nready; 1819 --coro_nready;
867 UNLOCK;
868 } 1820 }
869 else 1821 else
870 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1822 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
871 1823
872 if (coro->mainstack && coro->mainstack != main_mainstack) 1824 if (coro->next) coro->next->prev = coro->prev;
873 { 1825 if (coro->prev) coro->prev->next = coro->next;
874 struct coro temp; 1826 if (coro == coro_first) coro_first = coro->next;
875 1827
876 assert (!(coro->flags & CF_RUNNING)); 1828 if (coro->mainstack
877 1829 && coro->mainstack != main_mainstack
878 Zero (&temp, 1, struct coro); 1830 && coro->slot
879 temp.save = CORO_SAVE_DEF; 1831 && !PL_dirty)
880
881 if (coro->flags & CF_RUNNING)
882 croak ("FATAL: tried to destroy currently running coroutine");
883
884 save_perl (aTHX_ &temp);
885 load_perl (aTHX_ coro); 1832 destroy_perl (aTHX_ coro);
886
887 coro_destroy_stacks (aTHX);
888
889 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
890
891 coro->mainstack = 0;
892 }
893 1833
894 cctx_destroy (coro->cctx); 1834 cctx_destroy (coro->cctx);
1835 SvREFCNT_dec (coro->startcv);
895 SvREFCNT_dec (coro->args); 1836 SvREFCNT_dec (coro->args);
1837 SvREFCNT_dec (coro->swap_sv);
1838 SvREFCNT_dec (CORO_THROW);
896 1839
897 return 1; 1840 coro_call_on_destroy (aTHX_ coro);
1841
1842 /* more destruction mayhem in coro_state_free */
898} 1843}
899 1844
900static int 1845static int
901coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1846coro_state_free (pTHX_ SV *sv, MAGIC *mg)
902{ 1847{
903 struct coro *coro = (struct coro *)mg->mg_ptr; 1848 struct coro *coro = (struct coro *)mg->mg_ptr;
904 mg->mg_ptr = 0; 1849 mg->mg_ptr = 0;
905 1850
906 if (--coro->refcnt < 0)
907 {
908 coro_state_destroy (aTHX_ coro); 1851 coro_state_destroy (aTHX_ coro);
1852 SvREFCNT_dec (coro->on_destroy);
1853 SvREFCNT_dec (coro->status);
1854
909 Safefree (coro); 1855 Safefree (coro);
910 }
911 1856
912 return 0; 1857 return 0;
913} 1858}
914 1859
915static int 1860static int ecb_cold
916coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1861coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
917{ 1862{
918 struct coro *coro = (struct coro *)mg->mg_ptr; 1863 /* called when perl clones the current process the slow way (windows process emulation) */
919 1864 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
920 ++coro->refcnt; 1865 mg->mg_ptr = 0;
1866 mg->mg_virtual = 0;
921 1867
922 return 0; 1868 return 0;
923} 1869}
924 1870
925static MGVTBL coro_state_vtbl = { 1871static MGVTBL coro_state_vtbl = {
… …
931#else 1877#else
932# define MGf_DUP 0 1878# define MGf_DUP 0
933#endif 1879#endif
934}; 1880};
935 1881
936static struct coro *
937SvSTATE_ (pTHX_ SV *coro)
938{
939 HV *stash;
940 MAGIC *mg;
941
942 if (SvROK (coro))
943 coro = SvRV (coro);
944
945 stash = SvSTASH (coro);
946 if (stash != coro_stash && stash != coro_state_stash)
947 {
948 /* very slow, but rare, check */
949 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
950 croak ("Coro::State object required");
951 }
952
953 mg = CORO_MAGIC (coro);
954 return (struct coro *)mg->mg_ptr;
955}
956
957#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
958
959static void 1882static void
960prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1883prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
961{ 1884{
962 ta->prev = SvSTATE (prev_sv); 1885 ta->prev = SvSTATE (prev_sv);
963 ta->next = SvSTATE (next_sv); 1886 ta->next = SvSTATE (next_sv);
1887 TRANSFER_CHECK (*ta);
964} 1888}
965 1889
966static void 1890static void
967api_transfer (SV *prev_sv, SV *next_sv) 1891api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1892{
1893 struct coro_transfer_args ta;
1894
1895 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1896 TRANSFER (ta, 1);
1897}
1898
1899/** Coro ********************************************************************/
1900
1901ecb_inline void
1902coro_enq (pTHX_ struct coro *coro)
1903{
1904 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1905
1906 SvREFCNT_inc_NN (coro->hv);
1907
1908 coro->next_ready = 0;
1909 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1910 ready [1] = coro;
1911}
1912
1913ecb_inline struct coro *
1914coro_deq (pTHX)
1915{
1916 int prio;
1917
1918 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1919 {
1920 struct coro **ready = coro_ready [prio];
1921
1922 if (ready [0])
1923 {
1924 struct coro *coro = ready [0];
1925 ready [0] = coro->next_ready;
1926 return coro;
1927 }
1928 }
1929
1930 return 0;
1931}
1932
1933static void
1934invoke_sv_ready_hook_helper (void)
968{ 1935{
969 dTHX; 1936 dTHX;
970 struct transfer_args ta; 1937 dSP;
971 1938
972 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1939 ENTER;
973 TRANSFER (ta); 1940 SAVETMPS;
1941
1942 PUSHMARK (SP);
1943 PUTBACK;
1944 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1945
1946 FREETMPS;
1947 LEAVE;
974} 1948}
975 1949
976static int 1950static int
977api_save (SV *coro_sv, int new_save) 1951api_ready (pTHX_ SV *coro_sv)
978{ 1952{
979 dTHX;
980 struct coro *coro = SvSTATE (coro_sv); 1953 struct coro *coro = SvSTATE (coro_sv);
981 int old_save = coro->save;
982
983 if (new_save >= 0)
984 coro->save = new_save;
985
986 return old_save;
987}
988
989/** Coro ********************************************************************/
990
991static void
992coro_enq (pTHX_ SV *coro_sv)
993{
994 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
995}
996
997static SV *
998coro_deq (pTHX_ int min_prio)
999{
1000 int prio = PRIO_MAX - PRIO_MIN;
1001
1002 min_prio -= PRIO_MIN;
1003 if (min_prio < 0)
1004 min_prio = 0;
1005
1006 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1007 if (AvFILLp (coro_ready [prio]) >= 0)
1008 return av_shift (coro_ready [prio]);
1009
1010 return 0;
1011}
1012
1013static int
1014api_ready (SV *coro_sv)
1015{
1016 dTHX;
1017 struct coro *coro;
1018
1019 if (SvROK (coro_sv))
1020 coro_sv = SvRV (coro_sv);
1021
1022 coro = SvSTATE (coro_sv);
1023 1954
1024 if (coro->flags & CF_READY) 1955 if (coro->flags & CF_READY)
1025 return 0; 1956 return 0;
1026 1957
1027 coro->flags |= CF_READY; 1958 coro->flags |= CF_READY;
1028 1959
1029 LOCK; 1960 coro_enq (aTHX_ coro);
1030 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1961
1031 ++coro_nready; 1962 if (!coro_nready++)
1032 UNLOCK; 1963 if (coroapi.readyhook)
1964 coroapi.readyhook ();
1033 1965
1034 return 1; 1966 return 1;
1035} 1967}
1036 1968
1037static int 1969static int
1038api_is_ready (SV *coro_sv) 1970api_is_ready (pTHX_ SV *coro_sv)
1039{ 1971{
1040 dTHX;
1041 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1972 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1042} 1973}
1043 1974
1975/* expects to own a reference to next->hv */
1976ecb_inline void
1977prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1978{
1979 SV *prev_sv = SvRV (coro_current);
1980
1981 ta->prev = SvSTATE_hv (prev_sv);
1982 ta->next = next;
1983
1984 TRANSFER_CHECK (*ta);
1985
1986 SvRV_set (coro_current, (SV *)next->hv);
1987
1988 free_coro_mortal (aTHX);
1989 coro_mortal = prev_sv;
1990}
1991
1044static void 1992static void
1045prepare_schedule (pTHX_ struct transfer_args *ta) 1993prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1046{ 1994{
1047 SV *prev_sv, *next_sv;
1048
1049 for (;;) 1995 for (;;)
1050 { 1996 {
1051 LOCK; 1997 struct coro *next = coro_deq (aTHX);
1052 next_sv = coro_deq (aTHX_ PRIO_MIN);
1053 1998
1999 if (ecb_expect_true (next))
2000 {
2001 /* cannot transfer to destroyed coros, skip and look for next */
2002 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
2003 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
2004 else
2005 {
2006 next->flags &= ~CF_READY;
2007 --coro_nready;
2008
2009 prepare_schedule_to (aTHX_ ta, next);
2010 break;
2011 }
2012 }
2013 else
2014 {
1054 /* nothing to schedule: call the idle handler */ 2015 /* nothing to schedule: call the idle handler */
1055 if (!next_sv) 2016 if (SvROK (sv_idle)
2017 && SvOBJECT (SvRV (sv_idle)))
2018 {
2019 if (SvRV (sv_idle) == SvRV (coro_current))
2020 {
2021 require_pv ("Carp");
2022
2023 {
2024 dSP;
2025
2026 ENTER;
2027 SAVETMPS;
2028
2029 PUSHMARK (SP);
2030 XPUSHs (sv_2mortal (newSVpv ("FATAL: $Coro::idle blocked itself - did you try to block inside an event loop callback? Caught", 0)));
2031 PUTBACK;
2032 call_pv ("Carp::confess", G_VOID | G_DISCARD);
2033
2034 FREETMPS;
2035 LEAVE;
2036 }
2037 }
2038
2039 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
2040 api_ready (aTHX_ SvRV (sv_idle));
2041 --coro_nready;
2042 }
2043 else
2044 {
2045 /* TODO: deprecated, remove, cannot work reliably *//*D*/
2046 dSP;
2047
2048 ENTER;
2049 SAVETMPS;
2050
2051 PUSHMARK (SP);
2052 PUTBACK;
2053 call_sv (sv_idle, G_VOID | G_DISCARD);
2054
2055 FREETMPS;
2056 LEAVE;
2057 }
2058 }
2059 }
2060}
2061
2062ecb_inline void
2063prepare_cede (pTHX_ struct coro_transfer_args *ta)
2064{
2065 api_ready (aTHX_ coro_current);
2066 prepare_schedule (aTHX_ ta);
2067}
2068
2069ecb_inline void
2070prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
2071{
2072 SV *prev = SvRV (coro_current);
2073
2074 if (coro_nready)
2075 {
2076 prepare_schedule (aTHX_ ta);
2077 api_ready (aTHX_ prev);
2078 }
2079 else
2080 prepare_nop (aTHX_ ta);
2081}
2082
2083static void
2084api_schedule (pTHX)
2085{
2086 struct coro_transfer_args ta;
2087
2088 prepare_schedule (aTHX_ &ta);
2089 TRANSFER (ta, 1);
2090}
2091
2092static void
2093api_schedule_to (pTHX_ SV *coro_sv)
2094{
2095 struct coro_transfer_args ta;
2096 struct coro *next = SvSTATE (coro_sv);
2097
2098 SvREFCNT_inc_NN (coro_sv);
2099 prepare_schedule_to (aTHX_ &ta, next);
2100}
2101
2102static int
2103api_cede (pTHX)
2104{
2105 struct coro_transfer_args ta;
2106
2107 prepare_cede (aTHX_ &ta);
2108
2109 if (ecb_expect_true (ta.prev != ta.next))
2110 {
2111 TRANSFER (ta, 1);
2112 return 1;
2113 }
2114 else
2115 return 0;
2116}
2117
2118static int
2119api_cede_notself (pTHX)
2120{
2121 if (coro_nready)
2122 {
2123 struct coro_transfer_args ta;
2124
2125 prepare_cede_notself (aTHX_ &ta);
2126 TRANSFER (ta, 1);
2127 return 1;
2128 }
2129 else
2130 return 0;
2131}
2132
2133static void
2134api_trace (pTHX_ SV *coro_sv, int flags)
2135{
2136 struct coro *coro = SvSTATE (coro_sv);
2137
2138 if (coro->flags & CF_RUNNING)
2139 croak ("cannot enable tracing on a running coroutine, caught");
2140
2141 if (flags & CC_TRACE)
2142 {
2143 if (!coro->cctx)
2144 coro->cctx = cctx_new_run ();
2145 else if (!(coro->cctx->flags & CC_TRACE))
2146 croak ("cannot enable tracing on coroutine with custom stack, caught");
2147
2148 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2149 }
2150 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2151 {
2152 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2153
2154 if (coro->flags & CF_RUNNING)
2155 PL_runops = RUNOPS_DEFAULT;
2156 else
2157 coro->slot->runops = RUNOPS_DEFAULT;
2158 }
2159}
2160
2161static void
2162coro_push_av (pTHX_ AV *av, I32 gimme_v)
2163{
2164 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2165 {
2166 dSP;
2167
2168 if (gimme_v == G_SCALAR)
2169 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2170 else
2171 {
2172 int i;
2173 EXTEND (SP, AvFILLp (av) + 1);
2174
2175 for (i = 0; i <= AvFILLp (av); ++i)
2176 PUSHs (AvARRAY (av)[i]);
2177 }
2178
2179 PUTBACK;
2180 }
2181}
2182
2183static void
2184coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2185{
2186 if (!coro->on_destroy)
2187 coro->on_destroy = newAV ();
2188
2189 av_push (coro->on_destroy, cb);
2190}
2191
2192static void
2193slf_destroy_join (pTHX_ struct CoroSLF *frame)
2194{
2195 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2196}
2197
2198static int
2199slf_check_join (pTHX_ struct CoroSLF *frame)
2200{
2201 struct coro *coro = (struct coro *)frame->data;
2202
2203 if (!coro->status)
2204 return 1;
2205
2206 frame->destroy = 0;
2207
2208 coro_push_av (aTHX_ coro->status, GIMME_V);
2209
2210 SvREFCNT_dec ((SV *)coro->hv);
2211
2212 return 0;
2213}
2214
2215static void
2216slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2217{
2218 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2219
2220 if (items > 1)
2221 croak ("join called with too many arguments");
2222
2223 if (coro->status)
2224 frame->prepare = prepare_nop;
2225 else
2226 {
2227 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2228 frame->prepare = prepare_schedule;
2229 }
2230
2231 frame->check = slf_check_join;
2232 frame->destroy = slf_destroy_join;
2233 frame->data = (void *)coro;
2234 SvREFCNT_inc (coro->hv);
2235}
2236
2237static void
2238coro_call_on_destroy (pTHX_ struct coro *coro)
2239{
2240 AV *od = coro->on_destroy;
2241
2242 if (!od)
2243 return;
2244
2245 coro->on_destroy = 0;
2246 sv_2mortal ((SV *)od);
2247
2248 while (AvFILLp (od) >= 0)
2249 {
2250 SV *cb = sv_2mortal (av_pop (od));
2251
2252 /* coro hv's (and only hv's at the moment) are supported as well */
2253 if (SvSTATEhv_p (aTHX_ cb))
2254 api_ready (aTHX_ cb);
2255 else
2256 {
2257 dSP; /* don't disturb outer sp */
2258 PUSHMARK (SP);
2259
2260 if (coro->status)
2261 {
2262 PUTBACK;
2263 coro_push_av (aTHX_ coro->status, G_ARRAY);
2264 SPAGAIN;
2265 }
2266
2267 PUTBACK;
2268 call_sv (cb, G_VOID | G_DISCARD);
2269 }
2270 }
2271}
2272
2273static void
2274coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2275{
2276 AV *av;
2277
2278 if (coro->status)
2279 {
2280 av = coro->status;
2281 av_clear (av);
2282 }
2283 else
2284 av = coro->status = newAV ();
2285
2286 /* items are actually not so common, so optimise for this case */
2287 if (items)
2288 {
2289 int i;
2290
2291 av_extend (av, items - 1);
2292
2293 for (i = 0; i < items; ++i)
2294 av_push (av, SvREFCNT_inc_NN (arg [i]));
2295 }
2296}
2297
2298static void
2299slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2300{
2301 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2302 api_ready (aTHX_ sv_manager);
2303
2304 frame->prepare = prepare_schedule;
2305 frame->check = slf_check_repeat;
2306
2307 /* as a minor optimisation, we could unwind all stacks here */
2308 /* but that puts extra pressure on pp_slf, and is not worth much */
2309 /*coro_unwind_stacks (aTHX);*/
2310}
2311
2312static void
2313slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2314{
2315 HV *coro_hv = (HV *)SvRV (coro_current);
2316
2317 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2318 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2319}
2320
2321static void
2322slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2323{
2324 HV *coro_hv;
2325 struct coro *coro;
2326
2327 if (items <= 0)
2328 croak ("Coro::cancel called without coro object,");
2329
2330 coro = SvSTATE (arg [0]);
2331 coro_hv = coro->hv;
2332
2333 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2334
2335 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2336 {
2337 /* coro currently busy cancelling something, so just notify it */
2338 coro->slf_frame.data = (void *)coro;
2339
2340 frame->prepare = prepare_nop;
2341 frame->check = slf_check_nop;
2342 }
2343 else if (coro_hv == (HV *)SvRV (coro_current))
2344 {
2345 /* cancelling the current coro is allowed, and equals terminate */
2346 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2347 }
2348 else
2349 {
2350 struct coro *self = SvSTATE_current;
2351
2352 if (!self)
2353 croak ("Coro::cancel called outside of thread content,");
2354
2355 /* otherwise we cancel directly, purely for speed reasons
2356 * unfortunately, this requires some magic trickery, as
2357 * somebody else could cancel us, so we have to fight the cancellation.
2358 * this is ugly, and hopefully fully worth the extra speed.
2359 * besides, I can't get the slow-but-safe version working...
2360 */
2361 slf_frame.data = 0;
2362 self->flags |= CF_NOCANCEL;
2363 coro_state_destroy (aTHX_ coro);
2364 self->flags &= ~CF_NOCANCEL;
2365
2366 if (slf_frame.data)
2367 {
2368 /* while we were busy we have been cancelled, so terminate */
2369 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2370 }
2371 else
2372 {
2373 frame->prepare = prepare_nop;
2374 frame->check = slf_check_nop;
2375 }
2376 }
2377}
2378
2379static int
2380slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2381{
2382 frame->prepare = 0;
2383 coro_unwind_stacks (aTHX);
2384
2385 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2386
2387 return 1;
2388}
2389
2390static int
2391safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2392{
2393 if (coro->cctx)
2394 croak ("coro inside C callback, unable to cancel at this time, caught");
2395
2396 if (coro->flags & (CF_NEW | CF_ZOMBIE))
2397 {
2398 coro_set_status (aTHX_ coro, arg, items);
2399 coro_state_destroy (aTHX_ coro);
2400 }
2401 else
2402 {
2403 if (!coro->slf_frame.prepare)
2404 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2405
2406 slf_destroy (aTHX_ coro);
2407
2408 coro_set_status (aTHX_ coro, arg, items);
2409 coro->slf_frame.prepare = prepare_nop;
2410 coro->slf_frame.check = slf_check_safe_cancel;
2411
2412 api_ready (aTHX_ (SV *)coro->hv);
2413 }
2414
2415 return 1;
2416}
2417
2418/*****************************************************************************/
2419/* async pool handler */
2420
2421static int
2422slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2423{
2424 HV *hv = (HV *)SvRV (coro_current);
2425 struct coro *coro = (struct coro *)frame->data;
2426
2427 if (!coro->invoke_cb)
2428 return 1; /* loop till we have invoke */
2429 else
2430 {
2431 hv_store (hv, "desc", sizeof ("desc") - 1,
2432 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2433
2434 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2435
2436 {
2437 dSP;
2438 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2439 PUTBACK;
2440 }
2441
2442 SvREFCNT_dec (GvAV (PL_defgv));
2443 GvAV (PL_defgv) = coro->invoke_av;
2444 coro->invoke_av = 0;
2445
2446 return 0;
2447 }
2448}
2449
2450static void
2451slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2452{
2453 HV *hv = (HV *)SvRV (coro_current);
2454 struct coro *coro = SvSTATE_hv ((SV *)hv);
2455
2456 if (ecb_expect_true (coro->saved_deffh))
2457 {
2458 /* subsequent iteration */
2459 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2460 coro->saved_deffh = 0;
2461
2462 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2463 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2464 {
2465 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2466 return;
2467 }
2468 else
2469 {
2470 av_clear (GvAV (PL_defgv));
2471 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2472
2473 if (ecb_expect_false (coro->swap_sv))
2474 {
2475 SWAP_SVS_LEAVE (coro);
2476 SvREFCNT_dec_NN (coro->swap_sv);
2477 coro->swap_sv = 0;
2478 }
2479
2480 coro->prio = 0;
2481
2482 if (ecb_expect_false (coro->cctx) && ecb_expect_false (coro->cctx->flags & CC_TRACE))
2483 api_trace (aTHX_ coro_current, 0);
2484
2485 frame->prepare = prepare_schedule;
2486 av_push (av_async_pool, SvREFCNT_inc (hv));
2487 }
2488 }
2489 else
2490 {
2491 /* first iteration, simply fall through */
2492 frame->prepare = prepare_nop;
2493 }
2494
2495 frame->check = slf_check_pool_handler;
2496 frame->data = (void *)coro;
2497}
2498
2499/*****************************************************************************/
2500/* rouse callback */
2501
2502#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2503
2504static void
2505coro_rouse_callback (pTHX_ CV *cv)
2506{
2507 dXSARGS;
2508 SV *data = (SV *)S_GENSUB_ARG;
2509
2510 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2511 {
2512 /* first call, set args */
2513 SV *coro = SvRV (data);
2514 AV *av = newAV ();
2515
2516 SvRV_set (data, (SV *)av);
2517
2518 /* better take a full copy of the arguments */
2519 while (items--)
2520 av_store (av, items, newSVsv (ST (items)));
2521
2522 api_ready (aTHX_ coro);
2523 SvREFCNT_dec (coro);
2524 }
2525
2526 XSRETURN_EMPTY;
2527}
2528
2529static int
2530slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2531{
2532 SV *data = (SV *)frame->data;
2533
2534 if (CORO_THROW)
2535 return 0;
2536
2537 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2538 return 1;
2539
2540 /* now push all results on the stack */
2541 {
2542 dSP;
2543 AV *av = (AV *)SvRV (data);
2544 int i;
2545
2546 EXTEND (SP, AvFILLp (av) + 1);
2547 for (i = 0; i <= AvFILLp (av); ++i)
2548 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2549
2550 /* we have stolen the elements, so set length to zero and free */
2551 AvFILLp (av) = -1;
2552 av_undef (av);
2553
2554 PUTBACK;
2555 }
2556
2557 return 0;
2558}
2559
2560static void
2561slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2562{
2563 SV *cb;
2564
2565 if (items)
2566 cb = arg [0];
2567 else
2568 {
2569 struct coro *coro = SvSTATE_current;
2570
2571 if (!coro->rouse_cb)
2572 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2573
2574 cb = sv_2mortal (coro->rouse_cb);
2575 coro->rouse_cb = 0;
2576 }
2577
2578 if (!SvROK (cb)
2579 || SvTYPE (SvRV (cb)) != SVt_PVCV
2580 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2581 croak ("Coro::rouse_wait called with illegal callback argument,");
2582
2583 {
2584 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2585 SV *data = (SV *)S_GENSUB_ARG;
2586
2587 frame->data = (void *)data;
2588 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2589 frame->check = slf_check_rouse_wait;
2590 }
2591}
2592
2593static SV *
2594coro_new_rouse_cb (pTHX)
2595{
2596 HV *hv = (HV *)SvRV (coro_current);
2597 struct coro *coro = SvSTATE_hv (hv);
2598 SV *data = newRV_inc ((SV *)hv);
2599 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2600
2601 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2602 SvREFCNT_dec (data); /* magicext increases the refcount */
2603
2604 SvREFCNT_dec (coro->rouse_cb);
2605 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2606
2607 return cb;
2608}
2609
2610/*****************************************************************************/
2611/* schedule-like-function opcode (SLF) */
2612
2613static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2614static const CV *slf_cv;
2615static SV **slf_argv;
2616static int slf_argc, slf_arga; /* count, allocated */
2617static I32 slf_ax; /* top of stack, for restore */
2618
2619/* this restores the stack in the case we patched the entersub, to */
2620/* recreate the stack frame as perl will on following calls */
2621/* since entersub cleared the stack */
2622static OP *
2623pp_restore (pTHX)
2624{
2625 int i;
2626 SV **SP = PL_stack_base + slf_ax;
2627
2628 PUSHMARK (SP);
2629
2630 EXTEND (SP, slf_argc + 1);
2631
2632 for (i = 0; i < slf_argc; ++i)
2633 PUSHs (sv_2mortal (slf_argv [i]));
2634
2635 PUSHs ((SV *)CvGV (slf_cv));
2636
2637 RETURNOP (slf_restore.op_first);
2638}
2639
2640static void
2641slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2642{
2643 SV **arg = (SV **)slf_frame.data;
2644
2645 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2646}
2647
2648static void
2649slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2650{
2651 if (items != 2)
2652 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2653
2654 frame->prepare = slf_prepare_transfer;
2655 frame->check = slf_check_nop;
2656 frame->data = (void *)arg; /* let's hope it will stay valid */
2657}
2658
2659static void
2660slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2661{
2662 frame->prepare = prepare_schedule;
2663 frame->check = slf_check_nop;
2664}
2665
2666static void
2667slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2668{
2669 struct coro *next = (struct coro *)slf_frame.data;
2670
2671 SvREFCNT_inc_NN (next->hv);
2672 prepare_schedule_to (aTHX_ ta, next);
2673}
2674
2675static void
2676slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2677{
2678 if (!items)
2679 croak ("Coro::schedule_to expects a coroutine argument, caught");
2680
2681 frame->data = (void *)SvSTATE (arg [0]);
2682 frame->prepare = slf_prepare_schedule_to;
2683 frame->check = slf_check_nop;
2684}
2685
2686static void
2687slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2688{
2689 api_ready (aTHX_ SvRV (coro_current));
2690
2691 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2692}
2693
2694static void
2695slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2696{
2697 frame->prepare = prepare_cede;
2698 frame->check = slf_check_nop;
2699}
2700
2701static void
2702slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2703{
2704 frame->prepare = prepare_cede_notself;
2705 frame->check = slf_check_nop;
2706}
2707
2708/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2709static void
2710slf_destroy (pTHX_ struct coro *coro)
2711{
2712 struct CoroSLF frame = coro->slf_frame;
2713
2714 /*
2715 * The on_destroy below most likely is from an SLF call.
2716 * Since by definition the SLF call will not finish when we destroy
2717 * the coro, we will have to force-finish it here, otherwise
2718 * cleanup functions cannot call SLF functions.
2719 */
2720 coro->slf_frame.prepare = 0;
2721
2722 /* this callback is reserved for slf functions needing to do cleanup */
2723 if (frame.destroy && frame.prepare && !PL_dirty)
2724 frame.destroy (aTHX_ &frame);
2725}
2726
2727/*
2728 * these not obviously related functions are all rolled into one
2729 * function to increase chances that they all will call transfer with the same
2730 * stack offset
2731 * SLF stands for "schedule-like-function".
2732 */
2733static OP *
2734pp_slf (pTHX)
2735{
2736 I32 checkmark; /* mark SP to see how many elements check has pushed */
2737
2738 /* set up the slf frame, unless it has already been set-up */
2739 /* the latter happens when a new coro has been started */
2740 /* or when a new cctx was attached to an existing coroutine */
2741 if (ecb_expect_true (!slf_frame.prepare))
2742 {
2743 /* first iteration */
2744 dSP;
2745 SV **arg = PL_stack_base + TOPMARK + 1;
2746 int items = SP - arg; /* args without function object */
2747 SV *gv = *sp;
2748
2749 /* do a quick consistency check on the "function" object, and if it isn't */
2750 /* for us, divert to the real entersub */
2751 if (SvTYPE (gv) != SVt_PVGV
2752 || !GvCV (gv)
2753 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2754 return PL_ppaddr[OP_ENTERSUB](aTHX);
2755
2756 if (!(PL_op->op_flags & OPf_STACKED))
2757 {
2758 /* ampersand-form of call, use @_ instead of stack */
2759 AV *av = GvAV (PL_defgv);
2760 arg = AvARRAY (av);
2761 items = AvFILLp (av) + 1;
2762 }
2763
2764 /* now call the init function, which needs to set up slf_frame */
2765 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2766 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2767
2768 /* pop args */
2769 SP = PL_stack_base + POPMARK;
2770
2771 PUTBACK;
2772 }
2773
2774 /* now that we have a slf_frame, interpret it! */
2775 /* we use a callback system not to make the code needlessly */
2776 /* complicated, but so we can run multiple perl coros from one cctx */
2777
2778 do
2779 {
2780 struct coro_transfer_args ta;
2781
2782 slf_frame.prepare (aTHX_ &ta);
2783 TRANSFER (ta, 0);
2784
2785 checkmark = PL_stack_sp - PL_stack_base;
2786 }
2787 while (slf_frame.check (aTHX_ &slf_frame));
2788
2789 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2790
2791 /* exception handling */
2792 if (ecb_expect_false (CORO_THROW))
2793 {
2794 SV *exception = sv_2mortal (CORO_THROW);
2795
2796 CORO_THROW = 0;
2797 sv_setsv (ERRSV, exception);
2798 croak (0);
2799 }
2800
2801 /* return value handling - mostly like entersub */
2802 /* make sure we put something on the stack in scalar context */
2803 if (GIMME_V == G_SCALAR
2804 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2805 {
2806 dSP;
2807 SV **bot = PL_stack_base + checkmark;
2808
2809 if (sp == bot) /* too few, push undef */
2810 bot [1] = &PL_sv_undef;
2811 else /* too many, take last one */
2812 bot [1] = *sp;
2813
2814 SP = bot + 1;
2815
2816 PUTBACK;
2817 }
2818
2819 return NORMAL;
2820}
2821
2822static void
2823api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2824{
2825 int i;
2826 SV **arg = PL_stack_base + ax;
2827 int items = PL_stack_sp - arg + 1;
2828
2829 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2830
2831 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2832 && PL_op->op_ppaddr != pp_slf)
2833 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2834
2835 CvFLAGS (cv) |= CVf_SLF;
2836 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2837 slf_cv = cv;
2838
2839 /* we patch the op, and then re-run the whole call */
2840 /* we have to put the same argument on the stack for this to work */
2841 /* and this will be done by pp_restore */
2842 slf_restore.op_next = (OP *)&slf_restore;
2843 slf_restore.op_type = OP_CUSTOM;
2844 slf_restore.op_ppaddr = pp_restore;
2845 slf_restore.op_first = PL_op;
2846
2847 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2848
2849 if (PL_op->op_flags & OPf_STACKED)
2850 {
2851 if (items > slf_arga)
2852 {
2853 slf_arga = items;
2854 Safefree (slf_argv);
2855 New (0, slf_argv, slf_arga, SV *);
2856 }
2857
2858 slf_argc = items;
2859
2860 for (i = 0; i < items; ++i)
2861 slf_argv [i] = SvREFCNT_inc (arg [i]);
2862 }
2863 else
2864 slf_argc = 0;
2865
2866 PL_op->op_ppaddr = pp_slf;
2867 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2868
2869 PL_op = (OP *)&slf_restore;
2870}
2871
2872/*****************************************************************************/
2873/* dynamic wind */
2874
2875static void
2876on_enterleave_call (pTHX_ SV *cb)
2877{
2878 dSP;
2879
2880 PUSHSTACK;
2881
2882 PUSHMARK (SP);
2883 PUTBACK;
2884 call_sv (cb, G_VOID | G_DISCARD);
2885 SPAGAIN;
2886
2887 POPSTACK;
2888}
2889
2890static SV *
2891coro_avp_pop_and_free (pTHX_ AV **avp)
2892{
2893 AV *av = *avp;
2894 SV *res = av_pop (av);
2895
2896 if (AvFILLp (av) < 0)
2897 {
2898 *avp = 0;
2899 SvREFCNT_dec (av);
2900 }
2901
2902 return res;
2903}
2904
2905static void
2906coro_pop_on_enter (pTHX_ void *coro)
2907{
2908 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2909 SvREFCNT_dec (cb);
2910}
2911
2912static void
2913coro_pop_on_leave (pTHX_ void *coro)
2914{
2915 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2916 on_enterleave_call (aTHX_ sv_2mortal (cb));
2917}
2918
2919static void
2920enterleave_hook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, void *arg)
2921{
2922 if (!hook)
2923 return;
2924
2925 if (!*avp)
2926 {
2927 *avp = newAV ();
2928 AvREAL_off (*avp);
2929 }
2930
2931 av_push (*avp, (SV *)hook);
2932 av_push (*avp, (SV *)arg);
2933}
2934
2935static void
2936enterleave_unhook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, int execute)
2937{
2938 AV *av = *avp;
2939 int i;
2940
2941 if (!av)
2942 return;
2943
2944 for (i = AvFILLp (av) - 1; i >= 0; i -= 2)
2945 if (AvARRAY (av)[i] == (SV *)hook)
2946 {
2947 if (execute)
2948 hook (aTHX_ (void *)AvARRAY (av)[i + 1]);
2949
2950 memmove (AvARRAY (av) + i, AvARRAY (av) + i + 2, AvFILLp (av) - i - 1);
2951 av_pop (av);
2952 av_pop (av);
2953 break;
2954 }
2955
2956 if (AvFILLp (av) >= 0)
2957 {
2958 *avp = 0;
2959 SvREFCNT_dec_NN (av);
2960 }
2961}
2962
2963static void
2964api_enterleave_hook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2965{
2966 struct coro *coro = SvSTATE (coro_sv);
2967
2968 if (SvSTATE_current == coro)
2969 if (enter)
2970 enter (aTHX_ enter_arg);
2971
2972 enterleave_hook_xs (aTHX_ coro, &coro->on_enter_xs, enter, enter_arg);
2973 enterleave_hook_xs (aTHX_ coro, &coro->on_leave_xs, leave, leave_arg);
2974}
2975
2976static void
2977api_enterleave_unhook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, coro_enterleave_hook leave)
2978{
2979 struct coro *coro = SvSTATE (coro_sv);
2980
2981 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2982 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, SvSTATE_current == coro);
2983}
2984
2985static void
2986savedestructor_unhook_enter (pTHX_ coro_enterleave_hook enter)
2987{
2988 struct coro *coro = SvSTATE_current;
2989
2990 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2991}
2992
2993static void
2994savedestructor_unhook_leave (pTHX_ coro_enterleave_hook leave)
2995{
2996 struct coro *coro = SvSTATE_current;
2997
2998 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, 1);
2999}
3000
3001static void
3002api_enterleave_scope_hook (pTHX_ coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
3003{
3004 api_enterleave_hook (aTHX_ coro_current, enter, enter_arg, leave, leave_arg);
3005
3006 /* this ought to be much cheaper than malloc + a single destructor call */
3007 if (enter) SAVEDESTRUCTOR_X (savedestructor_unhook_enter, enter);
3008 if (leave) SAVEDESTRUCTOR_X (savedestructor_unhook_leave, leave);
3009}
3010
3011/*****************************************************************************/
3012/* PerlIO::cede */
3013
3014typedef struct
3015{
3016 PerlIOBuf base;
3017 NV next, every;
3018} PerlIOCede;
3019
3020static IV ecb_cold
3021PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3022{
3023 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
3024
3025 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
3026 self->next = nvtime () + self->every;
3027
3028 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
3029}
3030
3031static SV * ecb_cold
3032PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
3033{
3034 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
3035
3036 return newSVnv (self->every);
3037}
3038
3039static IV
3040PerlIOCede_flush (pTHX_ PerlIO *f)
3041{
3042 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
3043 double now = nvtime ();
3044
3045 if (now >= self->next)
3046 {
3047 api_cede (aTHX);
3048 self->next = now + self->every;
3049 }
3050
3051 return PerlIOBuf_flush (aTHX_ f);
3052}
3053
3054static PerlIO_funcs PerlIO_cede =
3055{
3056 sizeof(PerlIO_funcs),
3057 "cede",
3058 sizeof(PerlIOCede),
3059 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
3060 PerlIOCede_pushed,
3061 PerlIOBuf_popped,
3062 PerlIOBuf_open,
3063 PerlIOBase_binmode,
3064 PerlIOCede_getarg,
3065 PerlIOBase_fileno,
3066 PerlIOBuf_dup,
3067 PerlIOBuf_read,
3068 PerlIOBuf_unread,
3069 PerlIOBuf_write,
3070 PerlIOBuf_seek,
3071 PerlIOBuf_tell,
3072 PerlIOBuf_close,
3073 PerlIOCede_flush,
3074 PerlIOBuf_fill,
3075 PerlIOBase_eof,
3076 PerlIOBase_error,
3077 PerlIOBase_clearerr,
3078 PerlIOBase_setlinebuf,
3079 PerlIOBuf_get_base,
3080 PerlIOBuf_bufsiz,
3081 PerlIOBuf_get_ptr,
3082 PerlIOBuf_get_cnt,
3083 PerlIOBuf_set_ptrcnt,
3084};
3085
3086/*****************************************************************************/
3087/* Coro::Semaphore & Coro::Signal */
3088
3089static SV *
3090coro_waitarray_new (pTHX_ int count)
3091{
3092 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
3093 AV *av = newAV ();
3094 SV **ary;
3095
3096 /* unfortunately, building manually saves memory */
3097 Newx (ary, 2, SV *);
3098 AvALLOC (av) = ary;
3099#if PERL_VERSION_ATLEAST (5,10,0)
3100 AvARRAY (av) = ary;
3101#else
3102 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
3103 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
3104 SvPVX ((SV *)av) = (char *)ary;
3105#endif
3106 AvMAX (av) = 1;
3107 AvFILLp (av) = 0;
3108 ary [0] = newSViv (count);
3109
3110 return newRV_noinc ((SV *)av);
3111}
3112
3113/* semaphore */
3114
3115static void
3116coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
3117{
3118 SV *count_sv = AvARRAY (av)[0];
3119 IV count = SvIVX (count_sv);
3120
3121 count += adjust;
3122 SvIVX (count_sv) = count;
3123
3124 /* now wake up as many waiters as are expected to lock */
3125 while (count > 0 && AvFILLp (av) > 0)
3126 {
3127 SV *cb;
3128
3129 /* swap first two elements so we can shift a waiter */
3130 AvARRAY (av)[0] = AvARRAY (av)[1];
3131 AvARRAY (av)[1] = count_sv;
3132 cb = av_shift (av);
3133
3134 if (SvOBJECT (cb))
3135 {
3136 api_ready (aTHX_ cb);
3137 --count;
3138 }
3139 else if (SvTYPE (cb) == SVt_PVCV)
1056 { 3140 {
1057 dSP; 3141 dSP;
1058 UNLOCK;
1059
1060 ENTER;
1061 SAVETMPS;
1062
1063 PUSHMARK (SP); 3142 PUSHMARK (SP);
3143 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1064 PUTBACK; 3144 PUTBACK;
1065 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 3145 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1066
1067 FREETMPS;
1068 LEAVE;
1069 continue;
1070 } 3146 }
1071 3147
1072 ta->next = SvSTATE (next_sv); 3148 SvREFCNT_dec_NN (cb);
3149 }
3150}
1073 3151
1074 /* cannot transfer to destroyed coros, skip and look for next */ 3152static void
1075 if (ta->next->flags & CF_DESTROYED) 3153coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
3154{
3155 /* call $sem->adjust (0) to possibly wake up some other waiters */
3156 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
3157}
3158
3159static int
3160slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
3161{
3162 AV *av = (AV *)frame->data;
3163 SV *count_sv = AvARRAY (av)[0];
3164 SV *coro_hv = SvRV (coro_current);
3165
3166 frame->destroy = 0;
3167
3168 /* if we are about to throw, don't actually acquire the lock, just throw */
3169 if (ecb_expect_false (CORO_THROW))
3170 {
3171 /* we still might be responsible for the semaphore, so wake up others */
3172 coro_semaphore_adjust (aTHX_ av, 0);
3173
3174 return 0;
3175 }
3176 else if (SvIVX (count_sv) > 0)
3177 {
3178 if (acquire)
3179 SvIVX (count_sv) = SvIVX (count_sv) - 1;
3180 else
3181 coro_semaphore_adjust (aTHX_ av, 0);
3182
3183 return 0;
3184 }
3185 else
3186 {
3187 int i;
3188 /* if we were woken up but can't down, we look through the whole */
3189 /* waiters list and only add us if we aren't in there already */
3190 /* this avoids some degenerate memory usage cases */
3191 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
3192 if (AvARRAY (av)[i] == coro_hv)
3193 return 1;
3194
3195 av_push (av, SvREFCNT_inc (coro_hv));
3196 return 1;
3197 }
3198}
3199
3200static int
3201slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
3202{
3203 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
3204}
3205
3206static int
3207slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
3208{
3209 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3210}
3211
3212static void
3213slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3214{
3215 AV *av = (AV *)SvRV (arg [0]);
3216
3217 if (SvIVX (AvARRAY (av)[0]) > 0)
3218 {
3219 frame->data = (void *)av;
3220 frame->prepare = prepare_nop;
3221 }
3222 else
3223 {
3224 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3225
3226 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3227 frame->prepare = prepare_schedule;
3228 /* to avoid race conditions when a woken-up coro gets terminated */
3229 /* we arrange for a temporary on_destroy that calls adjust (0) */
3230 frame->destroy = coro_semaphore_destroy;
3231 }
3232}
3233
3234static void
3235slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3236{
3237 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3238 frame->check = slf_check_semaphore_down;
3239}
3240
3241static void
3242slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3243{
3244 if (items >= 2)
3245 {
3246 /* callback form */
3247 AV *av = (AV *)SvRV (arg [0]);
3248 SV *cb_cv = s_get_cv_croak (arg [1]);
3249
3250 av_push (av, SvREFCNT_inc_NN (cb_cv));
3251
3252 if (SvIVX (AvARRAY (av)[0]) > 0)
3253 coro_semaphore_adjust (aTHX_ av, 0);
3254
3255 frame->prepare = prepare_nop;
3256 frame->check = slf_check_nop;
3257 }
3258 else
3259 {
3260 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3261 frame->check = slf_check_semaphore_wait;
3262 }
3263}
3264
3265/* signal */
3266
3267static void
3268coro_signal_wake (pTHX_ AV *av, int count)
3269{
3270 SvIVX (AvARRAY (av)[0]) = 0;
3271
3272 /* now signal count waiters */
3273 while (count > 0 && AvFILLp (av) > 0)
3274 {
3275 SV *cb;
3276
3277 /* swap first two elements so we can shift a waiter */
3278 cb = AvARRAY (av)[0];
3279 AvARRAY (av)[0] = AvARRAY (av)[1];
3280 AvARRAY (av)[1] = cb;
3281
3282 cb = av_shift (av);
3283
3284 if (SvTYPE (cb) == SVt_PVCV)
1076 { 3285 {
3286 dSP;
3287 PUSHMARK (SP);
3288 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1077 UNLOCK; 3289 PUTBACK;
1078 SvREFCNT_dec (next_sv); 3290 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1079 /* coro_nready is already taken care of by destroy */
1080 continue;
1081 } 3291 }
3292 else
3293 {
3294 api_ready (aTHX_ cb);
3295 sv_setiv (cb, 0); /* signal waiter */
3296 }
1082 3297
1083 --coro_nready; 3298 SvREFCNT_dec_NN (cb);
1084 UNLOCK;
1085 break;
1086 }
1087 3299
1088 /* free this only after the transfer */ 3300 --count;
1089 prev_sv = SvRV (coro_current); 3301 }
1090 SvRV_set (coro_current, next_sv);
1091 ta->prev = SvSTATE (prev_sv);
1092
1093 assert (ta->next->flags & CF_READY);
1094 ta->next->flags &= ~CF_READY;
1095
1096 LOCK;
1097 free_coro_mortal (aTHX);
1098 coro_mortal = prev_sv;
1099 UNLOCK;
1100}
1101
1102static void
1103prepare_cede (pTHX_ struct transfer_args *ta)
1104{
1105 api_ready (coro_current);
1106 prepare_schedule (aTHX_ ta);
1107} 3302}
1108 3303
1109static int 3304static int
1110prepare_cede_notself (pTHX_ struct transfer_args *ta) 3305slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
1111{ 3306{
1112 if (coro_nready) 3307 /* if we are about to throw, also stop waiting */
3308 return SvROK ((SV *)frame->data) && !CORO_THROW;
3309}
3310
3311static void
3312slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3313{
3314 AV *av = (AV *)SvRV (arg [0]);
3315
3316 if (items >= 2)
3317 {
3318 SV *cb_cv = s_get_cv_croak (arg [1]);
3319 av_push (av, SvREFCNT_inc_NN (cb_cv));
3320
3321 if (SvIVX (AvARRAY (av)[0]))
3322 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3323
3324 frame->prepare = prepare_nop;
3325 frame->check = slf_check_nop;
1113 { 3326 }
1114 SV *prev = SvRV (coro_current); 3327 else if (SvIVX (AvARRAY (av)[0]))
1115 prepare_schedule (aTHX_ ta); 3328 {
1116 api_ready (prev); 3329 SvIVX (AvARRAY (av)[0]) = 0;
1117 return 1; 3330 frame->prepare = prepare_nop;
3331 frame->check = slf_check_nop;
1118 } 3332 }
1119 else 3333 else
3334 {
3335 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3336
3337 av_push (av, waiter);
3338
3339 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3340 frame->prepare = prepare_schedule;
3341 frame->check = slf_check_signal_wait;
3342 }
3343}
3344
3345/*****************************************************************************/
3346/* Coro::AIO */
3347
3348#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3349
3350/* helper storage struct */
3351struct io_state
3352{
3353 int errorno;
3354 I32 laststype; /* U16 in 5.10.0 */
3355 int laststatval;
3356 Stat_t statcache;
3357};
3358
3359static void
3360coro_aio_callback (pTHX_ CV *cv)
3361{
3362 dXSARGS;
3363 AV *state = (AV *)S_GENSUB_ARG;
3364 SV *coro = av_pop (state);
3365 SV *data_sv = newSV (sizeof (struct io_state));
3366
3367 av_extend (state, items - 1);
3368
3369 sv_upgrade (data_sv, SVt_PV);
3370 SvCUR_set (data_sv, sizeof (struct io_state));
3371 SvPOK_only (data_sv);
3372
3373 {
3374 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3375
3376 data->errorno = errno;
3377 data->laststype = PL_laststype;
3378 data->laststatval = PL_laststatval;
3379 data->statcache = PL_statcache;
3380 }
3381
3382 /* now build the result vector out of all the parameters and the data_sv */
3383 {
3384 int i;
3385
3386 for (i = 0; i < items; ++i)
3387 av_push (state, SvREFCNT_inc_NN (ST (i)));
3388 }
3389
3390 av_push (state, data_sv);
3391
3392 api_ready (aTHX_ coro);
3393 SvREFCNT_dec_NN (coro);
3394 SvREFCNT_dec_NN ((AV *)state);
3395}
3396
3397static int
3398slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3399{
3400 AV *state = (AV *)frame->data;
3401
3402 /* if we are about to throw, return early */
3403 /* this does not cancel the aio request, but at least */
3404 /* it quickly returns */
3405 if (CORO_THROW)
1120 return 0; 3406 return 0;
1121}
1122 3407
1123static void 3408 /* one element that is an RV? repeat! */
1124api_schedule (void) 3409 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
1125{
1126 dTHX;
1127 struct transfer_args ta;
1128
1129 prepare_schedule (aTHX_ &ta);
1130 TRANSFER (ta);
1131}
1132
1133static int
1134api_cede (void)
1135{
1136 dTHX;
1137 struct transfer_args ta;
1138
1139 prepare_cede (aTHX_ &ta);
1140
1141 if (ta.prev != ta.next)
1142 {
1143 TRANSFER (ta);
1144 return 1; 3410 return 1;
3411
3412 /* restore status */
3413 {
3414 SV *data_sv = av_pop (state);
3415 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3416
3417 errno = data->errorno;
3418 PL_laststype = data->laststype;
3419 PL_laststatval = data->laststatval;
3420 PL_statcache = data->statcache;
3421
3422 SvREFCNT_dec_NN (data_sv);
1145 } 3423 }
1146 else 3424
3425 /* push result values */
3426 {
3427 dSP;
3428 int i;
3429
3430 EXTEND (SP, AvFILLp (state) + 1);
3431 for (i = 0; i <= AvFILLp (state); ++i)
3432 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3433
3434 PUTBACK;
3435 }
3436
1147 return 0; 3437 return 0;
1148} 3438}
1149 3439
1150static int 3440static void
1151api_cede_notself (void) 3441slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1152{ 3442{
1153 dTHX; 3443 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
1154 struct transfer_args ta; 3444 SV *coro_hv = SvRV (coro_current);
3445 struct coro *coro = SvSTATE_hv (coro_hv);
1155 3446
1156 if (prepare_cede_notself (aTHX_ &ta)) 3447 /* put our coroutine id on the state arg */
1157 { 3448 av_push (state, SvREFCNT_inc_NN (coro_hv));
1158 TRANSFER (ta); 3449
1159 return 1; 3450 /* first see whether we have a non-zero priority and set it as AIO prio */
3451 if (coro->prio)
1160 } 3452 {
1161 else 3453 dSP;
1162 return 0;
1163}
1164 3454
3455 static SV *prio_cv;
3456 static SV *prio_sv;
3457
3458 if (ecb_expect_false (!prio_cv))
3459 {
3460 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3461 prio_sv = newSViv (0);
3462 }
3463
3464 PUSHMARK (SP);
3465 sv_setiv (prio_sv, coro->prio);
3466 XPUSHs (prio_sv);
3467
3468 PUTBACK;
3469 call_sv (prio_cv, G_VOID | G_DISCARD);
3470 }
3471
3472 /* now call the original request */
3473 {
3474 dSP;
3475 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3476 int i;
3477
3478 PUSHMARK (SP);
3479
3480 /* first push all args to the stack */
3481 EXTEND (SP, items + 1);
3482
3483 for (i = 0; i < items; ++i)
3484 PUSHs (arg [i]);
3485
3486 /* now push the callback closure */
3487 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3488
3489 /* now call the AIO function - we assume our request is uncancelable */
3490 PUTBACK;
3491 call_sv ((SV *)req, G_VOID | G_DISCARD);
3492 }
3493
3494 /* now that the request is going, we loop till we have a result */
3495 frame->data = (void *)state;
3496 frame->prepare = prepare_schedule;
3497 frame->check = slf_check_aio_req;
3498}
3499
3500static void
3501coro_aio_req_xs (pTHX_ CV *cv)
3502{
3503 dXSARGS;
3504
3505 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3506
3507 XSRETURN_EMPTY;
3508}
3509
3510/*****************************************************************************/
3511
3512#if CORO_CLONE
3513# include "clone.c"
3514#endif
3515
3516/*****************************************************************************/
3517
3518static SV *
3519coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3520{
3521 SV *coro_sv;
3522 struct coro *coro;
3523 MAGIC *mg;
3524 HV *hv;
3525 SV *cb;
3526 int i;
3527
3528 if (argc > 0)
3529 {
3530 cb = s_get_cv_croak (argv [0]);
3531
3532 if (!is_coro)
3533 {
3534 if (CvISXSUB (cb))
3535 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3536
3537 if (!CvROOT (cb))
3538 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3539 }
3540 }
3541
3542 Newz (0, coro, 1, struct coro);
3543 coro->args = newAV ();
3544 coro->flags = CF_NEW;
3545
3546 if (coro_first) coro_first->prev = coro;
3547 coro->next = coro_first;
3548 coro_first = coro;
3549
3550 coro->hv = hv = newHV ();
3551 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3552 mg->mg_flags |= MGf_DUP;
3553 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3554
3555 if (argc > 0)
3556 {
3557 av_extend (coro->args, argc + is_coro - 1);
3558
3559 if (is_coro)
3560 {
3561 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3562 cb = (SV *)cv_coro_run;
3563 }
3564
3565 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3566
3567 for (i = 1; i < argc; i++)
3568 av_push (coro->args, newSVsv (argv [i]));
3569 }
3570
3571 return coro_sv;
3572}
3573
3574#ifndef __cplusplus
3575ecb_cold XS(boot_Coro__State);
3576#endif
3577
3578#if CORO_JIT
3579
3580static void ecb_noinline ecb_cold
3581pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3582{
3583 dSP;
3584 AV *av = newAV ();
3585
3586 av_store (av, 3, newSVuv (d));
3587 av_store (av, 2, newSVuv (c));
3588 av_store (av, 1, newSVuv (b));
3589 av_store (av, 0, newSVuv (a));
3590
3591 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3592
3593 PUTBACK;
3594}
3595
3596static void ecb_noinline ecb_cold
3597jit_init (pTHX)
3598{
3599 dSP;
3600 SV *load, *save;
3601 char *map_base;
3602 char *load_ptr, *save_ptr;
3603 STRLEN load_len, save_len, map_len;
3604 int count;
3605
3606 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3607
3608 PUSHMARK (SP);
3609 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3610 #include "state.h"
3611 count = call_pv ("Coro::State::_jit", G_ARRAY);
3612 SPAGAIN;
3613
3614 save = POPs; save_ptr = SvPVbyte (save, save_len);
3615 load = POPs; load_ptr = SvPVbyte (load, load_len);
3616
3617 map_len = load_len + save_len + 16;
3618
3619 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3620
3621 if (map_base == (char *)MAP_FAILED)
3622 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3623
3624 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3625
3626 load_perl_slots = (load_save_perl_slots_type)map_base;
3627 memcpy (map_base, load_ptr, load_len);
3628
3629 map_base += (load_len + 15) & ~15;
3630
3631 save_perl_slots = (load_save_perl_slots_type)map_base;
3632 memcpy (map_base, save_ptr, save_len);
3633
3634 /* we are good citizens and try to make the page read-only, so the evil evil */
3635 /* hackers might have it a bit more difficult */
3636 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3637
3638 PUTBACK;
3639 eval_pv ("undef &Coro::State::_jit", 1);
3640}
3641
3642#endif
3643
1165MODULE = Coro::State PACKAGE = Coro::State 3644MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1166 3645
1167PROTOTYPES: DISABLE 3646PROTOTYPES: DISABLE
1168 3647
1169BOOT: 3648BOOT:
1170{ 3649{
3650#define VARx(name,expr,type) if (sizeof (type) < sizeof (expr)) croak ("FATAL: Coro thread context slot '" # name "' too small for this version of perl.");
3651#include "state.h"
1171#ifdef USE_ITHREADS 3652#ifdef USE_ITHREADS
1172 MUTEX_INIT (&coro_mutex); 3653# if CORO_PTHREAD
3654 coro_thx = PERL_GET_CONTEXT;
1173#endif 3655# endif
1174 BOOT_PAGESIZE; 3656#endif
3657 /* perl defines these to check for existance first, but why it doesn't */
3658 /* just create them one at init time is not clear to me, except for */
3659 /* programs trying to delete them, but... */
3660 /* anyway, we declare this as invalid and make sure they are initialised here */
3661 DEFSV;
3662 ERRSV;
3663
3664 cctx_current = cctx_new_empty ();
3665
3666 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3667 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3668
3669 {
3670 /*
3671 * we provide a vtbvl for %SIG magic that replaces PL_vtbl_sig
3672 * by coro_sig_vtbl in hash values.
3673 */
3674 MAGIC *mg = mg_find ((SV *)GvHV (gv_fetchpv ("SIG", GV_ADD | GV_NOTQUAL, SVt_PVHV)), PERL_MAGIC_sig);
3675
3676 /* this only works if perl doesn't have a vtbl for %SIG */
3677 assert (!mg->mg_virtual);
3678
3679 /*
3680 * The irony is that the perl API itself asserts that mg_virtual
3681 * must be non-const, yet perl5porters insisted on marking their
3682 * vtbls as read-only, just to thwart perl modules from patching
3683 * them.
3684 */
3685 mg->mg_virtual = (MGVTBL *)&coro_sig_vtbl;
3686 mg->mg_flags |= MGf_COPY;
3687
3688 coro_sigelem_vtbl = PL_vtbl_sigelem;
3689 coro_sigelem_vtbl.svt_get = coro_sigelem_get;
3690 coro_sigelem_vtbl.svt_set = coro_sigelem_set;
3691 coro_sigelem_vtbl.svt_clear = coro_sigelem_clr;
3692 }
3693
3694 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3695 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1175 3696
1176 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3697 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1177 3698
3699 newCONSTSUB (coro_state_stash, "BACKEND", newSVpv (CORO_BACKEND, 0)); /* undocumented */
3700
1178 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 3701 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1179 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV)); 3702 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1180 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1181 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1182 newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
1183 newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF)); 3703 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1184 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 3704 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1185 3705
1186 main_mainstack = PL_mainstack; 3706 main_mainstack = PL_mainstack;
1187 main_top_env = PL_top_env; 3707 main_top_env = PL_top_env;
1188 3708
1189 while (main_top_env->je_prev) 3709 while (main_top_env->je_prev)
1190 main_top_env = main_top_env->je_prev; 3710 main_top_env = main_top_env->je_prev;
1191 3711
3712 {
3713 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3714
3715 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3716 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3717
3718 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3719 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3720 }
3721
1192 coroapi.ver = CORO_API_VERSION; 3722 coroapi.ver = CORO_API_VERSION;
3723 coroapi.rev = CORO_API_REVISION;
3724
1193 coroapi.transfer = api_transfer; 3725 coroapi.transfer = api_transfer;
1194 3726
3727 coroapi.sv_state = SvSTATE_;
3728 coroapi.execute_slf = api_execute_slf;
3729 coroapi.prepare_nop = prepare_nop;
3730 coroapi.prepare_schedule = prepare_schedule;
3731 coroapi.prepare_cede = prepare_cede;
3732 coroapi.prepare_cede_notself = prepare_cede_notself;
3733
3734 time_init (aTHX);
3735
1195 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3736 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3737#if CORO_JIT
3738 PUTBACK;
3739 jit_init (aTHX);
3740 SPAGAIN;
3741#endif
1196} 3742}
1197 3743
1198SV * 3744SV *
1199new (char *klass, ...) 3745new (SV *klass, ...)
3746 ALIAS:
3747 Coro::new = 1
1200 CODE: 3748 CODE:
1201{ 3749 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1202 struct coro *coro;
1203 HV *hv;
1204 int i;
1205
1206 Newz (0, coro, 1, struct coro);
1207 coro->args = newAV ();
1208 coro->save = CORO_SAVE_DEF;
1209 coro->flags = CF_NEW;
1210
1211 hv = newHV ();
1212 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1213 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1214
1215 for (i = 1; i < items; i++)
1216 av_push (coro->args, newSVsv (ST (i)));
1217}
1218 OUTPUT:
1219 RETVAL
1220
1221int
1222save (SV *coro, int new_save = -1)
1223 CODE:
1224 RETVAL = api_save (coro, new_save);
1225 OUTPUT: 3750 OUTPUT:
1226 RETVAL 3751 RETVAL
1227 3752
1228int 3753void
1229save_also (SV *coro_sv, int save_also) 3754transfer (...)
3755 PROTOTYPE: $$
1230 CODE: 3756 CODE:
3757 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3758
3759SV *
3760clone (Coro::State coro)
3761 CODE:
1231{ 3762{
1232 struct coro *coro = SvSTATE (coro_sv); 3763#if CORO_CLONE
1233 RETVAL = coro->save; 3764 struct coro *ncoro = coro_clone (aTHX_ coro);
1234 coro->save |= save_also; 3765 MAGIC *mg;
3766 /* TODO: too much duplication */
3767 ncoro->hv = newHV ();
3768 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3769 mg->mg_flags |= MGf_DUP;
3770 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3771#else
3772 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3773#endif
1235} 3774}
1236 OUTPUT: 3775 OUTPUT:
1237 RETVAL 3776 RETVAL
1238 3777
1239void 3778int
1240_set_stacklevel (...) 3779cctx_stacksize (int new_stacksize = 0)
1241 ALIAS: 3780 PROTOTYPE: ;$
1242 Coro::State::transfer = 1 3781 CODE:
1243 Coro::schedule = 2 3782 RETVAL = cctx_stacksize;
1244 Coro::cede = 3 3783 if (new_stacksize)
1245 Coro::cede_notself = 4
1246 CODE:
1247{
1248 struct transfer_args ta;
1249
1250 switch (ix)
1251 { 3784 {
1252 case 0: 3785 cctx_stacksize = new_stacksize;
1253 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 3786 ++cctx_gen;
1254 ta.next = 0;
1255 break;
1256
1257 case 1:
1258 if (items != 2)
1259 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1260
1261 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1262 break;
1263
1264 case 2:
1265 prepare_schedule (aTHX_ &ta);
1266 break;
1267
1268 case 3:
1269 prepare_cede (aTHX_ &ta);
1270 break;
1271
1272 case 4:
1273 if (!prepare_cede_notself (aTHX_ &ta))
1274 XSRETURN_EMPTY;
1275
1276 break;
1277 } 3787 }
1278
1279 BARRIER;
1280 TRANSFER (ta);
1281
1282 if (GIMME_V != G_VOID && ta.next != ta.prev)
1283 XSRETURN_YES;
1284}
1285
1286bool
1287_destroy (SV *coro_sv)
1288 CODE:
1289 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1290 OUTPUT: 3788 OUTPUT:
1291 RETVAL 3789 RETVAL
1292 3790
1293void 3791int
1294_exit (code) 3792cctx_max_idle (int max_idle = 0)
1295 int code 3793 PROTOTYPE: ;$
1296 PROTOTYPE: $
1297 CODE: 3794 CODE:
1298 _exit (code); 3795 RETVAL = cctx_max_idle;
1299 3796 if (max_idle > 1)
1300int 3797 cctx_max_idle = max_idle;
1301cctx_stacksize (int new_stacksize = 0)
1302 CODE:
1303 RETVAL = coro_stacksize;
1304 if (new_stacksize)
1305 coro_stacksize = new_stacksize;
1306 OUTPUT: 3798 OUTPUT:
1307 RETVAL 3799 RETVAL
1308 3800
1309int 3801int
1310cctx_count () 3802cctx_count ()
3803 PROTOTYPE:
1311 CODE: 3804 CODE:
1312 RETVAL = cctx_count; 3805 RETVAL = cctx_count;
1313 OUTPUT: 3806 OUTPUT:
1314 RETVAL 3807 RETVAL
1315 3808
1316int 3809int
1317cctx_idle () 3810cctx_idle ()
3811 PROTOTYPE:
1318 CODE: 3812 CODE:
1319 RETVAL = cctx_idle; 3813 RETVAL = cctx_idle;
1320 OUTPUT: 3814 OUTPUT:
1321 RETVAL 3815 RETVAL
1322 3816
3817void
3818list ()
3819 PROTOTYPE:
3820 PPCODE:
3821{
3822 struct coro *coro;
3823 for (coro = coro_first; coro; coro = coro->next)
3824 if (coro->hv)
3825 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3826}
3827
3828void
3829call (Coro::State coro, SV *coderef)
3830 ALIAS:
3831 eval = 1
3832 CODE:
3833{
3834 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3835 {
3836 struct coro *current = SvSTATE_current;
3837 struct CoroSLF slf_save;
3838
3839 if (current != coro)
3840 {
3841 PUTBACK;
3842 save_perl (aTHX_ current);
3843 load_perl (aTHX_ coro);
3844 /* the coro is most likely in an active SLF call.
3845 * while not strictly required (the code we execute is
3846 * not allowed to call any SLF functions), it's cleaner
3847 * to reinitialise the slf_frame and restore it later.
3848 * This might one day allow us to actually do SLF calls
3849 * from code executed here.
3850 */
3851 slf_save = slf_frame;
3852 slf_frame.prepare = 0;
3853 SPAGAIN;
3854 }
3855
3856 PUSHSTACK;
3857
3858 PUSHMARK (SP);
3859 PUTBACK;
3860
3861 if (ix)
3862 eval_sv (coderef, 0);
3863 else
3864 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3865
3866 POPSTACK;
3867 SPAGAIN;
3868
3869 if (current != coro)
3870 {
3871 PUTBACK;
3872 slf_frame = slf_save;
3873 save_perl (aTHX_ coro);
3874 load_perl (aTHX_ current);
3875 SPAGAIN;
3876 }
3877 }
3878}
3879
3880SV *
3881is_ready (Coro::State coro)
3882 PROTOTYPE: $
3883 ALIAS:
3884 is_ready = CF_READY
3885 is_running = CF_RUNNING
3886 is_new = CF_NEW
3887 is_destroyed = CF_ZOMBIE
3888 is_zombie = CF_ZOMBIE
3889 is_suspended = CF_SUSPENDED
3890 CODE:
3891 RETVAL = boolSV (coro->flags & ix);
3892 OUTPUT:
3893 RETVAL
3894
3895void
3896throw (SV *self, SV *exception = &PL_sv_undef)
3897 PROTOTYPE: $;$
3898 CODE:
3899{
3900 struct coro *coro = SvSTATE (self);
3901 struct coro *current = SvSTATE_current;
3902 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3903 SvREFCNT_dec (*exceptionp);
3904 SvGETMAGIC (exception);
3905 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3906
3907 api_ready (aTHX_ self);
3908}
3909
3910void
3911api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3912 PROTOTYPE: $;$
3913 C_ARGS: aTHX_ coro, flags
3914
3915SV *
3916has_cctx (Coro::State coro)
3917 PROTOTYPE: $
3918 CODE:
3919 /* maybe manage the running flag differently */
3920 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3921 OUTPUT:
3922 RETVAL
3923
3924int
3925is_traced (Coro::State coro)
3926 PROTOTYPE: $
3927 CODE:
3928 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3929 OUTPUT:
3930 RETVAL
3931
3932UV
3933rss (Coro::State coro)
3934 PROTOTYPE: $
3935 ALIAS:
3936 usecount = 1
3937 CODE:
3938 switch (ix)
3939 {
3940 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3941 case 1: RETVAL = coro->usecount; break;
3942 }
3943 OUTPUT:
3944 RETVAL
3945
3946void
3947force_cctx ()
3948 PROTOTYPE:
3949 CODE:
3950 cctx_current->idle_sp = 0;
3951
3952void
3953swap_defsv (Coro::State self)
3954 PROTOTYPE: $
3955 ALIAS:
3956 swap_defav = 1
3957 CODE:
3958 if (!self->slot)
3959 croak ("cannot swap state with coroutine that has no saved state,");
3960 else
3961 {
3962 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3963 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3964
3965 SV *tmp = *src; *src = *dst; *dst = tmp;
3966 }
3967
3968void
3969cancel (Coro::State self)
3970 CODE:
3971 coro_state_destroy (aTHX_ self);
3972
3973SV *
3974enable_times (int enabled = enable_times)
3975 CODE:
3976{
3977 RETVAL = boolSV (enable_times);
3978
3979 if (enabled != enable_times)
3980 {
3981 enable_times = enabled;
3982
3983 coro_times_update ();
3984 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3985 }
3986}
3987 OUTPUT:
3988 RETVAL
3989
3990void
3991times (Coro::State self)
3992 PPCODE:
3993{
3994 struct coro *current = SvSTATE (coro_current);
3995
3996 if (ecb_expect_false (current == self))
3997 {
3998 coro_times_update ();
3999 coro_times_add (SvSTATE (coro_current));
4000 }
4001
4002 EXTEND (SP, 2);
4003 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
4004 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
4005
4006 if (ecb_expect_false (current == self))
4007 coro_times_sub (SvSTATE (coro_current));
4008}
4009
4010void
4011swap_sv (Coro::State coro, SV *sva, SV *svb)
4012 CODE:
4013{
4014 struct coro *current = SvSTATE_current;
4015 AV *swap_sv;
4016 int i;
4017
4018 sva = SvRV (sva);
4019 svb = SvRV (svb);
4020
4021 if (current == coro)
4022 SWAP_SVS_LEAVE (current);
4023
4024 if (!coro->swap_sv)
4025 coro->swap_sv = newAV ();
4026
4027 swap_sv = coro->swap_sv;
4028
4029 for (i = AvFILLp (swap_sv) - 1; i >= 0; i -= 2)
4030 {
4031 SV *a = AvARRAY (swap_sv)[i ];
4032 SV *b = AvARRAY (swap_sv)[i + 1];
4033
4034 if (a == sva && b == svb)
4035 {
4036 SvREFCNT_dec_NN (a);
4037 SvREFCNT_dec_NN (b);
4038
4039 for (; i <= AvFILLp (swap_sv) - 2; i++)
4040 AvARRAY (swap_sv)[i] = AvARRAY (swap_sv)[i + 2];
4041
4042 AvFILLp (swap_sv) -= 2;
4043
4044 goto removed;
4045 }
4046 }
4047
4048 av_push (swap_sv, SvREFCNT_inc_NN (sva));
4049 av_push (swap_sv, SvREFCNT_inc_NN (svb));
4050
4051 removed:
4052
4053 if (current == coro)
4054 SWAP_SVS_ENTER (current);
4055}
4056
4057
1323MODULE = Coro::State PACKAGE = Coro 4058MODULE = Coro::State PACKAGE = Coro
1324 4059
1325BOOT: 4060BOOT:
1326{ 4061{
1327 int i; 4062 if (SVt_LAST > 32)
4063 croak ("Coro internal error: SVt_LAST > 32, swap_sv might need adjustment");
1328 4064
4065 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
4066 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
4067 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
4068 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
4069 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
4070 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
4071 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
4072 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
4073
4074 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
4075 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
4076 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
4077 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
4078
1329 coro_stash = gv_stashpv ("Coro", TRUE); 4079 coro_stash = gv_stashpv ("Coro", TRUE);
1330 4080
1331 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 4081 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1332 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 4082 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1333 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 4083 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1334 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 4084 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1335 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 4085 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1336 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 4086 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1337
1338 coro_current = get_sv ("Coro::current", FALSE);
1339 SvREADONLY_on (coro_current);
1340
1341 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1342 coro_ready[i] = newAV ();
1343 4087
1344 { 4088 {
1345 SV *sv = perl_get_sv("Coro::API", 1); 4089 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1346 4090
1347 coroapi.schedule = api_schedule; 4091 coroapi.schedule = api_schedule;
1348 coroapi.save = api_save; 4092 coroapi.schedule_to = api_schedule_to;
1349 coroapi.cede = api_cede; 4093 coroapi.cede = api_cede;
1350 coroapi.cede_notself = api_cede_notself; 4094 coroapi.cede_notself = api_cede_notself;
1351 coroapi.ready = api_ready; 4095 coroapi.ready = api_ready;
1352 coroapi.is_ready = api_is_ready; 4096 coroapi.is_ready = api_is_ready;
1353 coroapi.nready = &coro_nready; 4097 coroapi.nready = coro_nready;
1354 coroapi.current = coro_current; 4098 coroapi.current = coro_current;
1355 4099
4100 coroapi.enterleave_hook = api_enterleave_hook;
4101 coroapi.enterleave_unhook = api_enterleave_unhook;
4102 coroapi.enterleave_scope_hook = api_enterleave_scope_hook;
4103
1356 GCoroAPI = &coroapi; 4104 /*GCoroAPI = &coroapi;*/
1357 sv_setiv (sv, (IV)&coroapi); 4105 sv_setiv (sv, PTR2IV (&coroapi));
1358 SvREADONLY_on (sv); 4106 SvREADONLY_on (sv);
1359 } 4107 }
1360} 4108}
4109
4110SV *
4111async (...)
4112 PROTOTYPE: &@
4113 CODE:
4114 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
4115 api_ready (aTHX_ RETVAL);
4116 OUTPUT:
4117 RETVAL
4118
4119void
4120_destroy (Coro::State coro)
4121 CODE:
4122 /* used by the manager thread */
4123 coro_state_destroy (aTHX_ coro);
4124
4125void
4126on_destroy (Coro::State coro, SV *cb)
4127 CODE:
4128 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
4129
4130void
4131join (...)
4132 CODE:
4133 CORO_EXECUTE_SLF_XS (slf_init_join);
4134
4135void
4136terminate (...)
4137 CODE:
4138 CORO_EXECUTE_SLF_XS (slf_init_terminate);
4139
4140void
4141cancel (...)
4142 CODE:
4143 CORO_EXECUTE_SLF_XS (slf_init_cancel);
4144
4145int
4146safe_cancel (Coro::State self, ...)
4147 C_ARGS: aTHX_ self, &ST (1), items - 1
4148
4149void
4150schedule (...)
4151 CODE:
4152 CORO_EXECUTE_SLF_XS (slf_init_schedule);
4153
4154void
4155schedule_to (...)
4156 CODE:
4157 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
4158
4159void
4160cede_to (...)
4161 CODE:
4162 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
4163
4164void
4165cede (...)
4166 CODE:
4167 CORO_EXECUTE_SLF_XS (slf_init_cede);
4168
4169void
4170cede_notself (...)
4171 CODE:
4172 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1361 4173
1362void 4174void
1363_set_current (SV *current) 4175_set_current (SV *current)
1364 PROTOTYPE: $ 4176 PROTOTYPE: $
1365 CODE: 4177 CODE:
1366 SvREFCNT_dec (SvRV (coro_current)); 4178 SvREFCNT_dec_NN (SvRV (coro_current));
1367 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 4179 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
4180
4181void
4182_set_readyhook (SV *hook)
4183 PROTOTYPE: $
4184 CODE:
4185 SvREFCNT_dec (coro_readyhook);
4186 SvGETMAGIC (hook);
4187 if (SvOK (hook))
4188 {
4189 coro_readyhook = newSVsv (hook);
4190 CORO_READYHOOK = invoke_sv_ready_hook_helper;
4191 }
4192 else
4193 {
4194 coro_readyhook = 0;
4195 CORO_READYHOOK = 0;
4196 }
1368 4197
1369int 4198int
1370prio (Coro::State coro, int newprio = 0) 4199prio (Coro::State coro, int newprio = 0)
4200 PROTOTYPE: $;$
1371 ALIAS: 4201 ALIAS:
1372 nice = 1 4202 nice = 1
1373 CODE: 4203 CODE:
1374{ 4204{
1375 RETVAL = coro->prio; 4205 RETVAL = coro->prio;
… …
1377 if (items > 1) 4207 if (items > 1)
1378 { 4208 {
1379 if (ix) 4209 if (ix)
1380 newprio = coro->prio - newprio; 4210 newprio = coro->prio - newprio;
1381 4211
1382 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 4212 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1383 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 4213 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1384 4214
1385 coro->prio = newprio; 4215 coro->prio = newprio;
1386 } 4216 }
1387} 4217}
1388 OUTPUT: 4218 OUTPUT:
… …
1390 4220
1391SV * 4221SV *
1392ready (SV *self) 4222ready (SV *self)
1393 PROTOTYPE: $ 4223 PROTOTYPE: $
1394 CODE: 4224 CODE:
1395 RETVAL = boolSV (api_ready (self)); 4225 RETVAL = boolSV (api_ready (aTHX_ self));
1396 OUTPUT:
1397 RETVAL
1398
1399SV *
1400is_ready (SV *self)
1401 PROTOTYPE: $
1402 CODE:
1403 RETVAL = boolSV (api_is_ready (self));
1404 OUTPUT: 4226 OUTPUT:
1405 RETVAL 4227 RETVAL
1406 4228
1407int 4229int
1408nready (...) 4230nready (...)
… …
1410 CODE: 4232 CODE:
1411 RETVAL = coro_nready; 4233 RETVAL = coro_nready;
1412 OUTPUT: 4234 OUTPUT:
1413 RETVAL 4235 RETVAL
1414 4236
1415MODULE = Coro::State PACKAGE = Coro::AIO 4237void
4238suspend (Coro::State self)
4239 PROTOTYPE: $
4240 CODE:
4241 self->flags |= CF_SUSPENDED;
4242
4243void
4244resume (Coro::State self)
4245 PROTOTYPE: $
4246 CODE:
4247 self->flags &= ~CF_SUSPENDED;
4248
4249void
4250_pool_handler (...)
4251 CODE:
4252 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
4253
4254void
4255async_pool (SV *cv, ...)
4256 PROTOTYPE: &@
4257 PPCODE:
4258{
4259 HV *hv = (HV *)av_pop (av_async_pool);
4260 AV *av = newAV ();
4261 SV *cb = ST (0);
4262 int i;
4263
4264 av_extend (av, items - 2);
4265 for (i = 1; i < items; ++i)
4266 av_push (av, SvREFCNT_inc_NN (ST (i)));
4267
4268 if ((SV *)hv == &PL_sv_undef)
4269 {
4270 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
4271 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
4272 SvREFCNT_dec_NN (sv);
4273 }
4274
4275 {
4276 struct coro *coro = SvSTATE_hv (hv);
4277
4278 assert (!coro->invoke_cb);
4279 assert (!coro->invoke_av);
4280 coro->invoke_cb = SvREFCNT_inc (cb);
4281 coro->invoke_av = av;
4282 }
4283
4284 api_ready (aTHX_ (SV *)hv);
4285
4286 if (GIMME_V != G_VOID)
4287 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4288 else
4289 SvREFCNT_dec_NN (hv);
4290}
1416 4291
1417SV * 4292SV *
1418_get_state () 4293rouse_cb ()
4294 PROTOTYPE:
1419 CODE: 4295 CODE:
1420{ 4296 RETVAL = coro_new_rouse_cb (aTHX);
1421 struct io_state *data;
1422
1423 RETVAL = newSV (sizeof (struct io_state));
1424 data = (struct io_state *)SvPVX (RETVAL);
1425 SvCUR_set (RETVAL, sizeof (struct io_state));
1426 SvPOK_only (RETVAL);
1427
1428 data->errorno = errno;
1429 data->laststype = PL_laststype;
1430 data->laststatval = PL_laststatval;
1431 data->statcache = PL_statcache;
1432}
1433 OUTPUT: 4297 OUTPUT:
1434 RETVAL 4298 RETVAL
1435 4299
1436void 4300void
1437_set_state (char *data_) 4301rouse_wait (...)
4302 PROTOTYPE: ;$
4303 PPCODE:
4304 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4305
4306void
4307on_enter (SV *block)
4308 ALIAS:
4309 on_leave = 1
1438 PROTOTYPE: $ 4310 PROTOTYPE: &
1439 CODE: 4311 CODE:
1440{ 4312{
1441 struct io_state *data = (void *)data_; 4313 struct coro *coro = SvSTATE_current;
4314 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1442 4315
1443 errno = data->errorno; 4316 block = s_get_cv_croak (block);
1444 PL_laststype = data->laststype;
1445 PL_laststatval = data->laststatval;
1446 PL_statcache = data->statcache;
1447}
1448 4317
4318 if (!*avp)
4319 *avp = newAV ();
4320
4321 av_push (*avp, SvREFCNT_inc (block));
4322
4323 if (!ix)
4324 on_enterleave_call (aTHX_ block);
4325
4326 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4327 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4328 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4329}
4330
4331
4332MODULE = Coro::State PACKAGE = PerlIO::cede
4333
4334BOOT:
4335 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4336
4337
4338MODULE = Coro::State PACKAGE = Coro::Semaphore
4339
4340SV *
4341new (SV *klass, SV *count = 0)
4342 CODE:
4343{
4344 int semcnt = 1;
4345
4346 if (count)
4347 {
4348 SvGETMAGIC (count);
4349
4350 if (SvOK (count))
4351 semcnt = SvIV (count);
4352 }
4353
4354 RETVAL = sv_bless (
4355 coro_waitarray_new (aTHX_ semcnt),
4356 GvSTASH (CvGV (cv))
4357 );
4358}
4359 OUTPUT:
4360 RETVAL
4361
4362# helper for Coro::Channel and others
4363SV *
4364_alloc (int count)
4365 CODE:
4366 RETVAL = coro_waitarray_new (aTHX_ count);
4367 OUTPUT:
4368 RETVAL
4369
4370SV *
4371count (SV *self)
4372 CODE:
4373 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4374 OUTPUT:
4375 RETVAL
4376
4377void
4378up (SV *self)
4379 CODE:
4380 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), 1);
4381
4382void
4383adjust (SV *self, int adjust)
4384 CODE:
4385 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), adjust);
4386
4387void
4388down (...)
4389 CODE:
4390 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4391
4392void
4393wait (...)
4394 CODE:
4395 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4396
4397void
4398try (SV *self)
4399 PPCODE:
4400{
4401 AV *av = (AV *)SvRV (self);
4402 SV *count_sv = AvARRAY (av)[0];
4403 IV count = SvIVX (count_sv);
4404
4405 if (count > 0)
4406 {
4407 --count;
4408 SvIVX (count_sv) = count;
4409 XSRETURN_YES;
4410 }
4411 else
4412 XSRETURN_NO;
4413}
4414
4415void
4416waiters (SV *self)
4417 PPCODE:
4418{
4419 AV *av = (AV *)SvRV (self);
4420 int wcount = AvFILLp (av) + 1 - 1;
4421
4422 if (GIMME_V == G_SCALAR)
4423 XPUSHs (sv_2mortal (newSViv (wcount)));
4424 else
4425 {
4426 int i;
4427 EXTEND (SP, wcount);
4428 for (i = 1; i <= wcount; ++i)
4429 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4430 }
4431}
4432
4433MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4434
4435void
4436_may_delete (SV *sem, int count, unsigned int extra_refs)
4437 PPCODE:
4438{
4439 AV *av = (AV *)SvRV (sem);
4440
4441 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4442 && AvFILLp (av) == 0 /* no waiters, just count */
4443 && SvIV (AvARRAY (av)[0]) == count)
4444 XSRETURN_YES;
4445
4446 XSRETURN_NO;
4447}
4448
4449MODULE = Coro::State PACKAGE = Coro::Signal
4450
4451SV *
4452new (SV *klass)
4453 CODE:
4454 RETVAL = sv_bless (
4455 coro_waitarray_new (aTHX_ 0),
4456 GvSTASH (CvGV (cv))
4457 );
4458 OUTPUT:
4459 RETVAL
4460
4461void
4462wait (...)
4463 CODE:
4464 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4465
4466void
4467broadcast (SV *self)
4468 CODE:
4469{
4470 AV *av = (AV *)SvRV (self);
4471 coro_signal_wake (aTHX_ av, AvFILLp (av));
4472}
4473
4474void
4475send (SV *self)
4476 CODE:
4477{
4478 AV *av = (AV *)SvRV (self);
4479
4480 if (AvFILLp (av))
4481 coro_signal_wake (aTHX_ av, 1);
4482 else
4483 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4484}
4485
4486IV
4487awaited (SV *self)
4488 CODE:
4489 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4490 OUTPUT:
4491 RETVAL
4492
4493
4494MODULE = Coro::State PACKAGE = Coro::AnyEvent
4495
4496BOOT:
4497 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4498
4499void
4500_schedule (...)
4501 CODE:
4502{
4503 static int incede;
4504
4505 api_cede_notself (aTHX);
4506
4507 ++incede;
4508 while (coro_nready >= incede && api_cede (aTHX))
4509 ;
4510
4511 sv_setsv (sv_activity, &PL_sv_undef);
4512 if (coro_nready >= incede)
4513 {
4514 PUSHMARK (SP);
4515 PUTBACK;
4516 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4517 }
4518
4519 --incede;
4520}
4521
4522
4523MODULE = Coro::State PACKAGE = Coro::AIO
4524
4525void
4526_register (char *target, char *proto, SV *req)
4527 CODE:
4528{
4529 SV *req_cv = s_get_cv_croak (req);
4530 /* newXSproto doesn't return the CV on 5.8 */
4531 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4532 sv_setpv ((SV *)slf_cv, proto);
4533 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4534}
4535
4536MODULE = Coro::State PACKAGE = Coro::Select
4537
4538void
4539patch_pp_sselect ()
4540 CODE:
4541 if (!coro_old_pp_sselect)
4542 {
4543 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4544 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4545 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4546 }
4547
4548void
4549unpatch_pp_sselect ()
4550 CODE:
4551 if (coro_old_pp_sselect)
4552 {
4553 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4554 coro_old_pp_sselect = 0;
4555 }
4556
4557MODULE = Coro::State PACKAGE = Coro::Util
4558
4559void
4560_exit (int code)
4561 CODE:
4562 _exit (code);
4563
4564NV
4565time ()
4566 CODE:
4567 RETVAL = nvtime (aTHX);
4568 OUTPUT:
4569 RETVAL
4570
4571NV
4572gettimeofday ()
4573 PPCODE:
4574{
4575 UV tv [2];
4576 u2time (aTHX_ tv);
4577 EXTEND (SP, 2);
4578 PUSHs (sv_2mortal (newSVuv (tv [0])));
4579 PUSHs (sv_2mortal (newSVuv (tv [1])));
4580}
4581

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