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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.144 by root, Sun Mar 4 11:45:23 2007 UTC vs.
Revision 1.456 by root, Sun Mar 6 06:26:21 2016 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1 /* perl usually disables NDEBUG later */
5
1#include "libcoro/coro.c" 6#include "libcoro/coro.c"
7
8#define PERL_NO_GET_CONTEXT
9#define PERL_EXT
2 10
3#include "EXTERN.h" 11#include "EXTERN.h"
4#include "perl.h" 12#include "perl.h"
5#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
6 15
7#include "patchlevel.h" 16#include "schmorp.h"
8 17
18#define ECB_NO_THREADS 1
19#define ECB_NO_LIBM 1
20#include "ecb.h"
21
22#include <stddef.h>
9#include <stdio.h> 23#include <stdio.h>
10#include <errno.h> 24#include <errno.h>
11#include <assert.h> 25#include <assert.h>
12 26
13#ifdef HAVE_MMAP 27#ifndef SvREFCNT_dec_NN
14# include <unistd.h> 28 #define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv)
15# include <sys/mman.h>
16# ifndef MAP_ANONYMOUS
17# ifdef MAP_ANON
18# define MAP_ANONYMOUS MAP_ANON
19# else
20# undef HAVE_MMAP
21# endif 29#endif
30
31#ifndef SvREFCNT_inc_NN
32 #define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
33#endif
34
35#ifndef SVs_PADSTALE
36# define SVs_PADSTALE 0
37#endif
38
39#ifdef PadARRAY
40# define NEWPADAPI 1
41# define newPADLIST(var) (Newz (0, var, 1, PADLIST), Newx (PadlistARRAY (var), 2, PAD *))
42#else
43typedef AV PADNAMELIST;
44# if !PERL_VERSION_ATLEAST(5,8,0)
45typedef AV PADLIST;
46typedef AV PAD;
22# endif 47# endif
23# include <limits.h> 48# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
24# ifndef PAGESIZE 49# define PadlistMAX(pl) AvFILLp (pl)
25# define PAGESIZE pagesize 50# define PadlistNAMES(pl) (*PadlistARRAY (pl))
26# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 51# define PadARRAY AvARRAY
27static long pagesize; 52# define PadMAX AvFILLp
28# else 53# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
29# define BOOT_PAGESIZE (void)0
30# endif 54#endif
55#ifndef PadnamelistREFCNT
56# define PadnamelistREFCNT(pnl) SvREFCNT (pnl)
57#endif
58#ifndef PadnamelistREFCNT_dec
59# define PadnamelistREFCNT_dec(pnl) SvREFCNT_dec (pnl)
60#endif
61
62/* 5.19.something has replaced SVt_BIND by SVt_INVLIST */
63/* we just alias it to SVt_IV, as that is sufficient for swap_sv for now */
64#if PERL_VERSION_ATLEAST(5,19,0)
65# define SVt_BIND SVt_IV
66#endif
67
68#if defined(_WIN32)
69# undef HAS_GETTIMEOFDAY
70# undef setjmp
71# undef longjmp
72# undef _exit
73# define setjmp _setjmp /* deep magic */
31#else 74#else
32# define PAGESIZE 0 75# include <inttypes.h> /* most portable stdint.h */
33# define BOOT_PAGESIZE (void)0
34#endif
35
36#if CORO_USE_VALGRIND
37# include <valgrind/valgrind.h>
38# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
39#else
40# define REGISTER_STACK(cctx,start,end)
41#endif 76#endif
42 77
43/* the maximum number of idle cctx that will be pooled */ 78/* the maximum number of idle cctx that will be pooled */
44#define MAX_IDLE_CCTX 8 79static int cctx_max_idle = 4;
45 80
46#define PERL_VERSION_ATLEAST(a,b,c) \ 81#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
47 (PERL_REVISION > (a) \ 82# define HAS_SCOPESTACK_NAME 1
48 || (PERL_REVISION == (a) \
49 && (PERL_VERSION > (b) \
50 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
51
52#if !PERL_VERSION_ATLEAST (5,6,0)
53# ifndef PL_ppaddr
54# define PL_ppaddr ppaddr
55# endif
56# ifndef call_sv
57# define call_sv perl_call_sv
58# endif
59# ifndef get_sv
60# define get_sv perl_get_sv
61# endif
62# ifndef get_cv
63# define get_cv perl_get_cv
64# endif
65# ifndef IS_PADGV
66# define IS_PADGV(v) 0
67# endif
68# ifndef IS_PADCONST
69# define IS_PADCONST(v) 0
70# endif
71#endif
72
73/* 5.8.7 */
74#ifndef SvRV_set
75# define SvRV_set(s,v) SvRV(s) = (v)
76#endif
77
78#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
79# undef CORO_STACKGUARD
80#endif
81
82#ifndef CORO_STACKGUARD
83# define CORO_STACKGUARD 0
84#endif 83#endif
85 84
86/* prefer perl internal functions over our own? */ 85/* prefer perl internal functions over our own? */
87#ifndef CORO_PREFER_PERL_FUNCTIONS 86#ifndef CORO_PREFER_PERL_FUNCTIONS
88# define CORO_PREFER_PERL_FUNCTIONS 0 87# define CORO_PREFER_PERL_FUNCTIONS 0
89#endif 88#endif
90 89
91/* The next macro should declare a variable stacklevel that contains and approximation 90/* The next macros try to return the current stack pointer, in an as
92 * to the current C stack pointer. Its property is that it changes with each call 91 * portable way as possible. */
93 * and should be unique. */
94#define dSTACKLEVEL int stacklevel
95#define STACKLEVEL ((void *)&stacklevel)
96
97#define IN_DESTRUCT (PL_main_cv == Nullcv)
98
99#if __GNUC__ >= 3 92#if __GNUC__ >= 4
100# define attribute(x) __attribute__(x) 93# define dSTACKLEVEL int stacklevel_dummy
101# define BARRIER __asm__ __volatile__ ("" : : : "memory") 94# define STACKLEVEL __builtin_frame_address (0)
102#else 95#else
103# define attribute(x) 96# define dSTACKLEVEL volatile void *stacklevel
104# define BARRIER 97# define STACKLEVEL ((void *)&stacklevel)
105#endif 98#endif
106 99
107#define NOINLINE attribute ((noinline)) 100#define IN_DESTRUCT PL_dirty
108 101
109#include "CoroAPI.h" 102#include "CoroAPI.h"
103#define GCoroAPI (&coroapi) /* very sneaky */
110 104
111#ifdef USE_ITHREADS 105#ifdef USE_ITHREADS
112static perl_mutex coro_mutex; 106# if CORO_PTHREAD
113# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 107static void *coro_thx;
114# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
115#else
116# define LOCK (void)0
117# define UNLOCK (void)0
118#endif 108# endif
109#endif
119 110
120/* helper storage struct for Coro::AIO */ 111#ifdef __linux
121struct io_state 112# include <time.h> /* for timespec */
122{ 113# include <syscall.h> /* for SYS_* */
123 int errorno; 114# ifdef SYS_clock_gettime
124 I32 laststype; 115# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
125 int laststatval; 116# define CORO_CLOCK_MONOTONIC 1
126 Stat_t statcache; 117# define CORO_CLOCK_THREAD_CPUTIME_ID 3
127}; 118# endif
119#endif
128 120
121static double (*nvtime)(); /* so why doesn't it take void? */
122static void (*u2time)(pTHX_ UV ret[2]);
123
124/* we hijack an hopefully unused CV flag for our purposes */
125#define CVf_SLF 0x4000
126static OP *pp_slf (pTHX);
127static void slf_destroy (pTHX_ struct coro *coro);
128
129static U32 cctx_gen;
130static size_t cctx_stacksize = CORO_STACKSIZE;
129static struct CoroAPI coroapi; 131static struct CoroAPI coroapi;
130static AV *main_mainstack; /* used to differentiate between $main and others */ 132static AV *main_mainstack; /* used to differentiate between $main and others */
133static JMPENV *main_top_env;
131static HV *coro_state_stash, *coro_stash; 134static HV *coro_state_stash, *coro_stash;
132static SV *coro_mortal; /* will be freed after next transfer */ 135static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
136
137static AV *av_destroy; /* destruction queue */
138static SV *sv_manager; /* the manager coro */
139static SV *sv_idle; /* $Coro::idle */
140
141static GV *irsgv; /* $/ */
142static GV *stdoutgv; /* *STDOUT */
143static SV *rv_diehook;
144static SV *rv_warnhook;
145
146/* async_pool helper stuff */
147static SV *sv_pool_rss;
148static SV *sv_pool_size;
149static SV *sv_async_pool_idle; /* description string */
150static AV *av_async_pool; /* idle pool */
151static SV *sv_Coro; /* class string */
152static CV *cv_pool_handler;
153
154/* Coro::AnyEvent */
155static SV *sv_activity;
156
157/* enable processtime/realtime profiling */
158static char enable_times;
159typedef U32 coro_ts[2];
160static coro_ts time_real, time_cpu;
161static char times_valid;
133 162
134static struct coro_cctx *cctx_first; 163static struct coro_cctx *cctx_first;
135static int cctx_count, cctx_idle; 164static int cctx_count, cctx_idle;
136 165
166enum
167{
168 CC_MAPPED = 0x01,
169 CC_NOREUSE = 0x02, /* throw this away after tracing */
170 CC_TRACE = 0x04,
171 CC_TRACE_SUB = 0x08, /* trace sub calls */
172 CC_TRACE_LINE = 0x10, /* trace each statement */
173 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
174};
175
137/* this is a structure representing a c-level coroutine */ 176/* this is a structure representing a c-level coroutine */
138typedef struct coro_cctx { 177typedef struct coro_cctx
178{
139 struct coro_cctx *next; 179 struct coro_cctx *next;
140 180
141 /* the stack */ 181 /* the stack */
142 void *sptr; 182 struct coro_stack stack;
143 ssize_t ssize; /* positive == mmap, otherwise malloc */
144 183
145 /* cpu state */ 184 /* cpu state */
146 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 185 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
186#ifndef NDEBUG
147 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 187 JMPENV *idle_te; /* same as idle_sp, but for top_env */
188#endif
148 JMPENV *top_env; 189 JMPENV *top_env;
149 coro_context cctx; 190 coro_context cctx;
150 191
151 int inuse; 192 U32 gen;
152
153#if CORO_USE_VALGRIND 193#if CORO_USE_VALGRIND
154 int valgrind_id; 194 int valgrind_id;
155#endif 195#endif
196 unsigned char flags;
156} coro_cctx; 197} coro_cctx;
157 198
199static coro_cctx *cctx_current; /* the currently running cctx */
200
201/*****************************************************************************/
202
203static MGVTBL coro_state_vtbl;
204
158enum { 205enum
206{
159 CF_RUNNING = 0x0001, /* coroutine is running */ 207 CF_RUNNING = 0x0001, /* coroutine is running */
160 CF_READY = 0x0002, /* coroutine is ready */ 208 CF_READY = 0x0002, /* coroutine is ready */
161 CF_NEW = 0x0004, /* has never been switched to */ 209 CF_NEW = 0x0004, /* has never been switched to */
162 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 210 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
211 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
212 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
163}; 213};
164 214
215/* the structure where most of the perl state is stored, overlaid on the cxstack */
216typedef struct
217{
218 #define VARx(name,expr,type) type name;
219 #include "state.h"
220} perl_slots;
221
222/* how many context stack entries do we need for perl_slots */
223#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
224
165/* this is a structure representing a perl-level coroutine */ 225/* this is a structure representing a perl-level coroutine */
166struct coro { 226struct coro
227{
167 /* the c coroutine allocated to this perl coroutine, if any */ 228 /* the C coroutine allocated to this perl coroutine, if any */
168 coro_cctx *cctx; 229 coro_cctx *cctx;
169 230
231 /* ready queue */
232 struct coro *next_ready;
233
234 /* state data */
235 struct CoroSLF slf_frame; /* saved slf frame */
236 AV *mainstack;
237 perl_slots *slot; /* basically the saved sp */
238
239 CV *startcv; /* the CV to execute */
170 /* data associated with this coroutine (initial args) */ 240 AV *args; /* data associated with this coroutine (initial args) */
171 AV *args;
172 int refcnt;
173 int save; /* CORO_SAVE flags */
174 int flags; /* CF_ flags */ 241 int flags; /* CF_ flags */
242 HV *hv; /* the perl hash associated with this coro, if any */
175 243
176 /* optionally saved, might be zero */ 244 /* statistics */
177 AV *defav; /* @_ */ 245 int usecount; /* number of transfers to this coro */
178 SV *defsv; /* $_ */
179 SV *errsv; /* $@ */
180 SV *irssv; /* $/ */
181 SV *irssv_sv; /* real $/ cache */
182
183#define VAR(name,type) type name;
184# include "state.h"
185#undef VAR
186 246
187 /* coro process data */ 247 /* coro process data */
188 int prio; 248 int prio;
249 SV *except; /* exception to be thrown */
250 SV *rouse_cb; /* last rouse callback */
251 AV *on_destroy; /* callbacks or coros to notify on destroy */
252 AV *status; /* the exit status list */
253
254 /* async_pool */
255 SV *saved_deffh;
256 SV *invoke_cb;
257 AV *invoke_av;
258
259 /* on_enter/on_leave */
260 AV *on_enter; AV *on_enter_xs;
261 AV *on_leave; AV *on_leave_xs;
262
263 /* swap_sv */
264 AV *swap_sv;
265
266 /* times */
267 coro_ts t_cpu, t_real;
268
269 /* linked list */
270 struct coro *next, *prev;
189}; 271};
190 272
191typedef struct coro *Coro__State; 273typedef struct coro *Coro__State;
192typedef struct coro *Coro__State_or_hashref; 274typedef struct coro *Coro__State_or_hashref;
193 275
276/* the following variables are effectively part of the perl context */
277/* and get copied between struct coro and these variables */
278/* the main reason we don't support windows process emulation */
279static struct CoroSLF slf_frame; /* the current slf frame */
280
194/** Coro ********************************************************************/ 281/** Coro ********************************************************************/
195 282
196#define PRIO_MAX 3 283#define CORO_PRIO_MAX 3
197#define PRIO_HIGH 1 284#define CORO_PRIO_HIGH 1
198#define PRIO_NORMAL 0 285#define CORO_PRIO_NORMAL 0
199#define PRIO_LOW -1 286#define CORO_PRIO_LOW -1
200#define PRIO_IDLE -3 287#define CORO_PRIO_IDLE -3
201#define PRIO_MIN -4 288#define CORO_PRIO_MIN -4
202 289
203/* for Coro.pm */ 290/* for Coro.pm */
204static SV *coro_current; 291static SV *coro_current;
205static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 292static SV *coro_readyhook;
206static int coro_nready; 293static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
294static CV *cv_coro_run;
295static struct coro *coro_first;
296#define coro_nready coroapi.nready
297
298/** JIT *********************************************************************/
299
300#if CORO_JIT
301 /* APPLE doesn't have mmap though */
302 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
303 #ifndef CORO_JIT_TYPE
304 #if ECB_AMD64 && CORO_JIT_UNIXY
305 #define CORO_JIT_TYPE "amd64-unix"
306 #elif __i386 && CORO_JIT_UNIXY
307 #define CORO_JIT_TYPE "x86-unix"
308 #endif
309 #endif
310#endif
311
312#if !defined(CORO_JIT_TYPE) || _POSIX_MEMORY_PROTECTION <= 0
313 #undef CORO_JIT
314#endif
315
316#if CORO_JIT
317 typedef void (*load_save_perl_slots_type)(perl_slots *);
318 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
319#endif
320
321/** Coro::Select ************************************************************/
322
323static OP *(*coro_old_pp_sselect) (pTHX);
324static SV *coro_select_select;
325
326/* horrible hack, but if it works... */
327static OP *
328coro_pp_sselect (pTHX)
329{
330 dSP;
331 PUSHMARK (SP - 4); /* fake argument list */
332 XPUSHs (coro_select_select);
333 PUTBACK;
334
335 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
336 PL_op->op_flags |= OPf_STACKED;
337 PL_op->op_private = 0;
338 return PL_ppaddr [OP_ENTERSUB](aTHX);
339}
340
341/** time stuff **************************************************************/
342
343#ifdef HAS_GETTIMEOFDAY
344
345ecb_inline void
346coro_u2time (pTHX_ UV ret[2])
347{
348 struct timeval tv;
349 gettimeofday (&tv, 0);
350
351 ret [0] = tv.tv_sec;
352 ret [1] = tv.tv_usec;
353}
354
355ecb_inline double
356coro_nvtime (void)
357{
358 struct timeval tv;
359 gettimeofday (&tv, 0);
360
361 return tv.tv_sec + tv.tv_usec * 1e-6;
362}
363
364ecb_inline void
365time_init (pTHX)
366{
367 nvtime = coro_nvtime;
368 u2time = coro_u2time;
369}
370
371#else
372
373ecb_inline void
374time_init (pTHX)
375{
376 SV **svp;
377
378 require_pv ("Time/HiRes.pm");
379
380 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
381
382 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
383 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
384
385 nvtime = INT2PTR (double (*)(), SvIV (*svp));
386
387 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
388 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
389}
390
391#endif
207 392
208/** lowlevel stuff **********************************************************/ 393/** lowlevel stuff **********************************************************/
209 394
210static AV * 395static SV * ecb_noinline
396coro_get_sv (pTHX_ const char *name, int create)
397{
398#if PERL_VERSION_ATLEAST (5,10,0)
399 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
400 get_sv (name, create);
401#endif
402 return get_sv (name, create);
403}
404
405static AV * ecb_noinline
406coro_get_av (pTHX_ const char *name, int create)
407{
408#if PERL_VERSION_ATLEAST (5,10,0)
409 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
410 get_av (name, create);
411#endif
412 return get_av (name, create);
413}
414
415static HV * ecb_noinline
416coro_get_hv (pTHX_ const char *name, int create)
417{
418#if PERL_VERSION_ATLEAST (5,10,0)
419 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
420 get_hv (name, create);
421#endif
422 return get_hv (name, create);
423}
424
425ecb_inline void
426coro_times_update (void)
427{
428#ifdef coro_clock_gettime
429 struct timespec ts;
430
431 ts.tv_sec = ts.tv_nsec = 0;
432 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
433 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
434
435 ts.tv_sec = ts.tv_nsec = 0;
436 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
437 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
438#else
439 dTHX;
440 UV tv[2];
441
442 u2time (aTHX_ tv);
443 time_real [0] = tv [0];
444 time_real [1] = tv [1] * 1000;
445#endif
446}
447
448ecb_inline void
449coro_times_add (struct coro *c)
450{
451 c->t_real [1] += time_real [1];
452 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
453 c->t_real [0] += time_real [0];
454
455 c->t_cpu [1] += time_cpu [1];
456 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
457 c->t_cpu [0] += time_cpu [0];
458}
459
460ecb_inline void
461coro_times_sub (struct coro *c)
462{
463 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
464 c->t_real [1] -= time_real [1];
465 c->t_real [0] -= time_real [0];
466
467 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
468 c->t_cpu [1] -= time_cpu [1];
469 c->t_cpu [0] -= time_cpu [0];
470}
471
472/*****************************************************************************/
473/* magic glue */
474
475#define CORO_MAGIC_type_cv 26
476#define CORO_MAGIC_type_state PERL_MAGIC_ext
477
478#define CORO_MAGIC_NN(sv, type) \
479 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
480 ? SvMAGIC (sv) \
481 : mg_find (sv, type))
482
483#define CORO_MAGIC(sv, type) \
484 (ecb_expect_true (SvMAGIC (sv)) \
485 ? CORO_MAGIC_NN (sv, type) \
486 : 0)
487
488#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
489#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
490
491ecb_inline MAGIC *
492SvSTATEhv_p (pTHX_ SV *coro)
493{
494 MAGIC *mg;
495
496 if (ecb_expect_true (
497 SvTYPE (coro) == SVt_PVHV
498 && (mg = CORO_MAGIC_state (coro))
499 && mg->mg_virtual == &coro_state_vtbl
500 ))
501 return mg;
502
503 return 0;
504}
505
506ecb_inline struct coro *
507SvSTATE_ (pTHX_ SV *coro_sv)
508{
509 MAGIC *mg;
510
511 if (SvROK (coro_sv))
512 coro_sv = SvRV (coro_sv);
513
514 mg = SvSTATEhv_p (aTHX_ coro_sv);
515 if (!mg)
516 croak ("Coro::State object required");
517
518 return (struct coro *)mg->mg_ptr;
519}
520
521#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
522
523/* faster than SvSTATE, but expects a coroutine hv */
524#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
525#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
526
527/*****************************************************************************/
528/* padlist management and caching */
529
530ecb_inline PADLIST *
211coro_clone_padlist (CV *cv) 531coro_derive_padlist (pTHX_ CV *cv)
212{ 532{
213 AV *padlist = CvPADLIST (cv); 533 PADLIST *padlist = CvPADLIST (cv);
214 AV *newpadlist, *newpad; 534 PADLIST *newpadlist;
535 PADNAMELIST *padnames;
536 PAD *newpad;
537 PADOFFSET off = PadlistMAX (padlist) + 1;
215 538
216 newpadlist = newAV (); 539#if NEWPADAPI
540
541 /* if we had the original CvDEPTH, we might be able to steal the CvDEPTH+1 entry instead */
542 /* 20131102194744.GA6705@schmorp.de, 20131102195825.2013.qmail@lists-nntp.develooper.com */
543 while (!PadlistARRAY (padlist)[off - 1])
544 --off;
545
546 Perl_pad_push (aTHX_ padlist, off);
547
548 newpad = PadlistARRAY (padlist)[off];
549 PadlistARRAY (padlist)[off] = 0;
550
551#else
552
553#if PERL_VERSION_ATLEAST (5,10,0)
554 Perl_pad_push (aTHX_ padlist, off);
555#else
556 Perl_pad_push (aTHX_ padlist, off, 1);
557#endif
558
559 newpad = PadlistARRAY (padlist)[off];
560 PadlistMAX (padlist) = off - 1;
561
562#endif
563
564 newPADLIST (newpadlist);
565#if !PERL_VERSION_ATLEAST(5,15,3)
566 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
217 AvREAL_off (newpadlist); 567 AvREAL_off (newpadlist);
218#if PERL_VERSION_ATLEAST (5,9,0)
219 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
220#else
221 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
222#endif 568#endif
223 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
224 --AvFILLp (padlist);
225 569
226 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 570 /* Already extended to 2 elements by newPADLIST. */
227 av_store (newpadlist, 1, (SV *)newpad); 571 PadlistMAX (newpadlist) = 1;
572
573 padnames = PadlistNAMES (padlist);
574 ++PadnamelistREFCNT (padnames);
575 PadlistNAMES (newpadlist) = padnames;
576
577 PadlistARRAY (newpadlist)[1] = newpad;
228 578
229 return newpadlist; 579 return newpadlist;
230} 580}
231 581
232static void 582ecb_inline void
233free_padlist (AV *padlist) 583free_padlist (pTHX_ PADLIST *padlist)
234{ 584{
235 /* may be during global destruction */ 585 /* may be during global destruction */
236 if (SvREFCNT (padlist)) 586 if (!IN_DESTRUCT)
237 { 587 {
238 I32 i = AvFILLp (padlist); 588 I32 i = PadlistMAX (padlist);
239 while (i >= 0) 589
590 while (i > 0) /* special-case index 0 */
240 { 591 {
241 SV **svp = av_fetch (padlist, i--, FALSE); 592 /* we try to be extra-careful here */
593 PAD *pad = PadlistARRAY (padlist)[i--];
594
242 if (svp) 595 if (pad)
243 { 596 {
244 SV *sv; 597 I32 j = PadMAX (pad);
245 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 598
599 while (j >= 0)
246 SvREFCNT_dec (sv); 600 SvREFCNT_dec (PadARRAY (pad)[j--]);
247 601
602 PadMAX (pad) = -1;
248 SvREFCNT_dec (*svp); 603 SvREFCNT_dec (pad);
249 } 604 }
250 } 605 }
251 606
607 PadnamelistREFCNT_dec (PadlistNAMES (padlist));
608
609#if NEWPADAPI
610 Safefree (PadlistARRAY (padlist));
611 Safefree (padlist);
612#else
613 AvFILLp (padlist) = -1;
614 AvREAL_off (padlist);
252 SvREFCNT_dec ((SV*)padlist); 615 SvREFCNT_dec ((SV*)padlist);
616#endif
253 } 617 }
254} 618}
255 619
256static int 620static int
257coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 621coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
258{ 622{
259 AV *padlist; 623 PADLIST *padlist;
260 AV *av = (AV *)mg->mg_obj; 624 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
625 size_t len = *(size_t *)mg->mg_ptr;
261 626
262 /* casting is fun. */ 627 /* perl manages to free our internal AV and _then_ call us */
263 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 628 if (IN_DESTRUCT)
629 return 0;
630
631 while (len--)
264 free_padlist (padlist); 632 free_padlist (aTHX_ padlists[len]);
265
266 SvREFCNT_dec (av);
267 633
268 return 0; 634 return 0;
269} 635}
270 636
271#define PERL_MAGIC_coro PERL_MAGIC_ext 637static MGVTBL coro_cv_vtbl = {
272 638 0, 0, 0, 0,
273static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 639 coro_cv_free
274 640};
275#define CORO_MAGIC(cv) \
276 SvMAGIC (cv) \
277 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
278 ? SvMAGIC (cv) \
279 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
280 : 0
281 641
282/* the next two functions merely cache the padlists */ 642/* the next two functions merely cache the padlists */
283static void 643ecb_inline void
284get_padlist (CV *cv) 644get_padlist (pTHX_ CV *cv)
285{ 645{
286 MAGIC *mg = CORO_MAGIC (cv); 646 MAGIC *mg = CORO_MAGIC_cv (cv);
287 AV *av; 647 size_t *lenp;
288 648
289 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 649 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
290 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 650 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
291 else 651 else
292 { 652 {
293#if CORO_PREFER_PERL_FUNCTIONS 653#if CORO_PREFER_PERL_FUNCTIONS
294 /* this is probably cleaner, but also slower? */ 654 /* this is probably cleaner? but also slower! */
655 /* in practise, it seems to be less stable */
295 CV *cp = Perl_cv_clone (cv); 656 CV *cp = Perl_cv_clone (aTHX_ cv);
296 CvPADLIST (cv) = CvPADLIST (cp); 657 CvPADLIST (cv) = CvPADLIST (cp);
297 CvPADLIST (cp) = 0; 658 CvPADLIST (cp) = 0;
298 SvREFCNT_dec (cp); 659 SvREFCNT_dec (cp);
299#else 660#else
300 CvPADLIST (cv) = coro_clone_padlist (cv); 661 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
301#endif 662#endif
302 } 663 }
303} 664}
304 665
305static void 666ecb_inline void
306put_padlist (CV *cv) 667put_padlist (pTHX_ CV *cv)
307{ 668{
308 MAGIC *mg = CORO_MAGIC (cv); 669 MAGIC *mg = CORO_MAGIC_cv (cv);
309 AV *av;
310 670
311 if (!mg) 671 if (ecb_expect_false (!mg))
312 {
313 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
314 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
315 mg->mg_virtual = &vtbl_coro;
316 mg->mg_obj = (SV *)newAV ();
317 } 672 {
673 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
674 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
675 mg->mg_len = 1; /* so mg_free frees mg_ptr */
676 }
677 else
678 Renew (mg->mg_ptr,
679 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
680 char);
318 681
319 av = (AV *)mg->mg_obj; 682 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
320
321 if (AvFILLp (av) >= AvMAX (av))
322 av_extend (av, AvMAX (av) + 1);
323
324 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
325} 683}
326 684
327/** load & save, init *******************************************************/ 685/** load & save, init *******************************************************/
328 686
329#define SB do { 687ecb_inline void
330#define SE } while (0) 688swap_sv (SV *a, SV *b)
689{
690 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
691 SV tmp;
331 692
332#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE 693 /* swap sv_any */
694 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
333 695
696 /* swap sv_flags */
697 SvFLAGS (&tmp) = SvFLAGS (a);
698 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
699 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
700
701#if PERL_VERSION_ATLEAST (5,10,0)
702 /* perl 5.10 and later complicates this _quite_ a bit, but it also
703 * is much faster, so no quarrels here. alternatively, we could
704 * sv_upgrade to avoid this.
705 */
706 {
707 /* swap sv_u */
708 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
709
710 /* if SvANY points to the head, we need to adjust the pointers,
711 * as the pointer for a still points to b, and maybe vice versa.
712 */
713 U32 svany_in_head_set = (1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV);
714 #if NVSIZE <= IVSIZE && PERL_VERSION_ATLEAST(5,22,0)
715 svany_in_head_set |= 1 << SVt_NV;
716 #endif
717
718 #define svany_in_head(type) (svany_in_head_set & (1 << (type)))
719
720 if (svany_in_head (SvTYPE (a)))
721 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
722
723 if (svany_in_head (SvTYPE (b)))
724 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
725 }
726#endif
727}
728
729/* swap sv heads, at least logically */
334static void 730static void
731swap_svs (pTHX_ Coro__State c)
732{
733 int i;
734
735 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
736 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
737}
738
739#define SWAP_SVS(coro) \
740 if (ecb_expect_false ((coro)->swap_sv)) \
741 swap_svs (aTHX_ (coro))
742
743static void
744on_enterleave_call (pTHX_ SV *cb);
745
746static void
335load_perl (Coro__State c) 747load_perl (pTHX_ Coro__State c)
336{ 748{
337#define VAR(name,type) PL_ ## name = c->name; 749 perl_slots *slot = c->slot;
750 c->slot = 0;
751
752 PL_mainstack = c->mainstack;
753
754#if CORO_JIT
755 load_perl_slots (slot);
756#else
757 #define VARx(name,expr,type) expr = slot->name;
338# include "state.h" 758 #include "state.h"
339#undef VAR 759#endif
340
341 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
342 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
343 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
344 if (c->irssv)
345 {
346 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
347 SvREFCNT_dec (c->irssv);
348 else
349 {
350 REPLACE_SV (PL_rs, c->irssv);
351 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
352 sv_setsv (c->irssv_sv, PL_rs);
353 }
354 }
355 760
356 { 761 {
357 dSP; 762 dSP;
763
358 CV *cv; 764 CV *cv;
359 765
360 /* now do the ugly restore mess */ 766 /* now do the ugly restore mess */
361 while ((cv = (CV *)POPs)) 767 while (ecb_expect_true (cv = (CV *)POPs))
362 { 768 {
363 put_padlist (cv); /* mark this padlist as available */ 769 put_padlist (aTHX_ cv); /* mark this padlist as available */
364 CvDEPTH (cv) = PTR2IV (POPs); 770 CvDEPTH (cv) = PTR2IV (POPs);
365 CvPADLIST (cv) = (AV *)POPs; 771 CvPADLIST (cv) = (PADLIST *)POPs;
366 } 772 }
367 773
368 PUTBACK; 774 PUTBACK;
369 } 775 }
370 assert (!PL_comppad || AvARRAY (PL_comppad));//D
371}
372 776
777 slf_frame = c->slf_frame;
778 CORO_THROW = c->except;
779
780 if (ecb_expect_false (enable_times))
781 {
782 if (ecb_expect_false (!times_valid))
783 coro_times_update ();
784
785 coro_times_sub (c);
786 }
787
788 if (ecb_expect_false (c->on_enter))
789 {
790 int i;
791
792 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
793 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
794 }
795
796 if (ecb_expect_false (c->on_enter_xs))
797 {
798 int i;
799
800 for (i = 0; i <= AvFILLp (c->on_enter_xs); i += 2)
801 ((coro_enterleave_hook)AvARRAY (c->on_enter_xs)[i]) (aTHX_ AvARRAY (c->on_enter_xs)[i + 1]);
802 }
803
804 SWAP_SVS (c);
805}
806
373static void 807static void
374save_perl (Coro__State c) 808save_perl (pTHX_ Coro__State c)
375{ 809{
376 assert (!PL_comppad || AvARRAY (PL_comppad));//D 810 SWAP_SVS (c);
811
812 if (ecb_expect_false (c->on_leave_xs))
813 {
814 int i;
815
816 for (i = AvFILLp (c->on_leave_xs) - 1; i >= 0; i -= 2)
817 ((coro_enterleave_hook)AvARRAY (c->on_leave_xs)[i]) (aTHX_ AvARRAY (c->on_leave_xs)[i + 1]);
818 }
819
820 if (ecb_expect_false (c->on_leave))
821 {
822 int i;
823
824 for (i = AvFILLp (c->on_leave); i >= 0; --i)
825 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
826 }
827
828 times_valid = 0;
829
830 if (ecb_expect_false (enable_times))
831 {
832 coro_times_update (); times_valid = 1;
833 coro_times_add (c);
834 }
835
836 c->except = CORO_THROW;
837 c->slf_frame = slf_frame;
838
377 { 839 {
378 dSP; 840 dSP;
379 I32 cxix = cxstack_ix; 841 I32 cxix = cxstack_ix;
380 PERL_CONTEXT *ccstk = cxstack; 842 PERL_CONTEXT *ccstk = cxstack;
381 PERL_SI *top_si = PL_curstackinfo; 843 PERL_SI *top_si = PL_curstackinfo;
… …
383 /* 845 /*
384 * the worst thing you can imagine happens first - we have to save 846 * the worst thing you can imagine happens first - we have to save
385 * (and reinitialize) all cv's in the whole callchain :( 847 * (and reinitialize) all cv's in the whole callchain :(
386 */ 848 */
387 849
388 EXTEND (SP, 3 + 1);
389 PUSHs (Nullsv); 850 XPUSHs (Nullsv);
390 /* this loop was inspired by pp_caller */ 851 /* this loop was inspired by pp_caller */
391 for (;;) 852 for (;;)
392 { 853 {
393 while (cxix >= 0) 854 while (ecb_expect_true (cxix >= 0))
394 { 855 {
395 PERL_CONTEXT *cx = &ccstk[cxix--]; 856 PERL_CONTEXT *cx = &ccstk[cxix--];
396 857
397 if (CxTYPE (cx) == CXt_SUB) 858 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
398 { 859 {
399 CV *cv = cx->blk_sub.cv; 860 CV *cv = cx->blk_sub.cv;
400 861
401 if (CvDEPTH (cv)) 862 if (ecb_expect_true (CvDEPTH (cv)))
402 { 863 {
403 EXTEND (SP, 3); 864 EXTEND (SP, 3);
404 PUSHs ((SV *)CvPADLIST (cv)); 865 PUSHs ((SV *)CvPADLIST (cv));
405 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 866 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
406 PUSHs ((SV *)cv); 867 PUSHs ((SV *)cv);
407 868
408 CvDEPTH (cv) = 0; 869 CvDEPTH (cv) = 0;
409 get_padlist (cv); 870 get_padlist (aTHX_ cv);
410 } 871 }
411 } 872 }
412 } 873 }
413 874
414 if (top_si->si_type == PERLSI_MAIN) 875 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
415 break; 876 break;
416 877
417 top_si = top_si->si_prev; 878 top_si = top_si->si_prev;
418 ccstk = top_si->si_cxstack; 879 ccstk = top_si->si_cxstack;
419 cxix = top_si->si_cxix; 880 cxix = top_si->si_cxix;
420 } 881 }
421 882
422 PUTBACK; 883 PUTBACK;
423 } 884 }
424 885
425 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 886 /* allocate some space on the context stack for our purposes */
426 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 887 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
427 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 888 {
428 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; 889 unsigned int i;
429 890
430#define VAR(name,type)c->name = PL_ ## name; 891 for (i = 0; i < SLOT_COUNT; ++i)
892 CXINC;
893
894 cxstack_ix -= SLOT_COUNT; /* undo allocation */
895 }
896
897 c->mainstack = PL_mainstack;
898
899 {
900 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
901
902#if CORO_JIT
903 save_perl_slots (slot);
904#else
905 #define VARx(name,expr,type) slot->name = expr;
431# include "state.h" 906 #include "state.h"
432#undef VAR 907#endif
908 }
433} 909}
434 910
435/* 911/*
436 * allocate various perl stacks. This is an exact copy 912 * allocate various perl stacks. This is almost an exact copy
437 * of perl.c:init_stacks, except that it uses less memory 913 * of perl.c:init_stacks, except that it uses less memory
438 * on the (sometimes correct) assumption that coroutines do 914 * on the (sometimes correct) assumption that coroutines do
439 * not usually need a lot of stackspace. 915 * not usually need a lot of stackspace.
440 */ 916 */
441#if CORO_PREFER_PERL_FUNCTIONS 917#if CORO_PREFER_PERL_FUNCTIONS
442# define coro_init_stacks init_stacks 918# define coro_init_stacks(thx) init_stacks ()
443#else 919#else
444static void 920static void
445coro_init_stacks () 921coro_init_stacks (pTHX)
446{ 922{
447 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 923 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
448 PL_curstackinfo->si_type = PERLSI_MAIN; 924 PL_curstackinfo->si_type = PERLSI_MAIN;
449 PL_curstack = PL_curstackinfo->si_stack; 925 PL_curstack = PL_curstackinfo->si_stack;
450 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 926 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
451 927
452 PL_stack_base = AvARRAY(PL_curstack); 928 PL_stack_base = AvARRAY(PL_curstack);
453 PL_stack_sp = PL_stack_base; 929 PL_stack_sp = PL_stack_base;
454 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 930 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
455 931
456 New(50,PL_tmps_stack,128,SV*); 932 New(50,PL_tmps_stack,32,SV*);
457 PL_tmps_floor = -1; 933 PL_tmps_floor = -1;
458 PL_tmps_ix = -1; 934 PL_tmps_ix = -1;
459 PL_tmps_max = 128; 935 PL_tmps_max = 32;
460 936
461 New(54,PL_markstack,32,I32); 937 New(54,PL_markstack,16,I32);
462 PL_markstack_ptr = PL_markstack; 938 PL_markstack_ptr = PL_markstack;
463 PL_markstack_max = PL_markstack + 32; 939 PL_markstack_max = PL_markstack + 16;
464 940
465#ifdef SET_MARK_OFFSET 941#ifdef SET_MARK_OFFSET
466 SET_MARK_OFFSET; 942 SET_MARK_OFFSET;
467#endif 943#endif
468 944
469 New(54,PL_scopestack,32,I32); 945 New(54,PL_scopestack,8,I32);
470 PL_scopestack_ix = 0; 946 PL_scopestack_ix = 0;
471 PL_scopestack_max = 32; 947 PL_scopestack_max = 8;
948#if HAS_SCOPESTACK_NAME
949 New(54,PL_scopestack_name,8,const char*);
950#endif
472 951
473 New(54,PL_savestack,64,ANY); 952 New(54,PL_savestack,24,ANY);
474 PL_savestack_ix = 0; 953 PL_savestack_ix = 0;
475 PL_savestack_max = 64; 954 PL_savestack_max = 24;
476 955
477#if !PERL_VERSION_ATLEAST (5,9,0) 956#if !PERL_VERSION_ATLEAST (5,10,0)
478 New(54,PL_retstack,16,OP*); 957 New(54,PL_retstack,4,OP*);
479 PL_retstack_ix = 0; 958 PL_retstack_ix = 0;
480 PL_retstack_max = 16; 959 PL_retstack_max = 4;
481#endif 960#endif
482} 961}
483#endif 962#endif
484 963
485/* 964/*
486 * destroy the stacks, the callchain etc... 965 * destroy the stacks, the callchain etc...
487 */ 966 */
488static void 967static void
489coro_destroy_stacks () 968coro_destruct_stacks (pTHX)
490{ 969{
491 if (!IN_DESTRUCT)
492 {
493 /* restore all saved variables and stuff */
494 LEAVE_SCOPE (0);
495 assert (PL_tmps_floor == -1);
496
497 /* free all temporaries */
498 FREETMPS;
499 assert (PL_tmps_ix == -1);
500
501 /* unwind all extra stacks */
502 POPSTACK_TO (PL_mainstack);
503
504 /* unwind main stack */
505 dounwind (-1);
506 }
507
508 while (PL_curstackinfo->si_next) 970 while (PL_curstackinfo->si_next)
509 PL_curstackinfo = PL_curstackinfo->si_next; 971 PL_curstackinfo = PL_curstackinfo->si_next;
510 972
511 while (PL_curstackinfo) 973 while (PL_curstackinfo)
512 { 974 {
… …
521 } 983 }
522 984
523 Safefree (PL_tmps_stack); 985 Safefree (PL_tmps_stack);
524 Safefree (PL_markstack); 986 Safefree (PL_markstack);
525 Safefree (PL_scopestack); 987 Safefree (PL_scopestack);
988#if HAS_SCOPESTACK_NAME
989 Safefree (PL_scopestack_name);
990#endif
526 Safefree (PL_savestack); 991 Safefree (PL_savestack);
527#if !PERL_VERSION_ATLEAST (5,9,0) 992#if !PERL_VERSION_ATLEAST (5,10,0)
528 Safefree (PL_retstack); 993 Safefree (PL_retstack);
529#endif 994#endif
530} 995}
531 996
997#define CORO_RSS \
998 rss += sizeof (SYM (curstackinfo)); \
999 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
1000 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
1001 rss += SYM (tmps_max) * sizeof (SV *); \
1002 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
1003 rss += SYM (scopestack_max) * sizeof (I32); \
1004 rss += SYM (savestack_max) * sizeof (ANY);
1005
1006static size_t
1007coro_rss (pTHX_ struct coro *coro)
1008{
1009 size_t rss = sizeof (*coro);
1010
1011 if (coro->mainstack)
1012 {
1013 if (coro->flags & CF_RUNNING)
1014 {
1015 #define SYM(sym) PL_ ## sym
1016 CORO_RSS;
1017 #undef SYM
1018 }
1019 else
1020 {
1021 #define SYM(sym) coro->slot->sym
1022 CORO_RSS;
1023 #undef SYM
1024 }
1025 }
1026
1027 return rss;
1028}
1029
532/** coroutine stack handling ************************************************/ 1030/** coroutine stack handling ************************************************/
533 1031
1032static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
1033static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
1034static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
1035
1036/* apparently < 5.8.8 */
1037#ifndef MgPV_nolen_const
1038#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
1039 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
1040 (const char*)(mg)->mg_ptr)
1041#endif
1042
1043/*
1044 * This overrides the default magic get method of %SIG elements.
1045 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
1046 * and instead of trying to save and restore the hash elements (extremely slow),
1047 * we just provide our own readback here.
1048 */
1049static int ecb_cold
1050coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
1051{
1052 const char *s = MgPV_nolen_const (mg);
1053
1054 if (*s == '_')
1055 {
1056 SV **svp = 0;
1057
1058 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1059 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1060
1061 if (svp)
1062 {
1063 SV *ssv;
1064
1065 if (!*svp)
1066 ssv = &PL_sv_undef;
1067 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1068 ssv = sv_2mortal (newRV_inc (*svp));
1069 else
1070 ssv = *svp;
1071
1072 sv_setsv (sv, ssv);
1073 return 0;
1074 }
1075 }
1076
1077 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1078}
1079
1080static int ecb_cold
1081coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1082{
1083 const char *s = MgPV_nolen_const (mg);
1084
1085 if (*s == '_')
1086 {
1087 SV **svp = 0;
1088
1089 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1090 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1091
1092 if (svp)
1093 {
1094 SV *old = *svp;
1095 *svp = 0;
1096 SvREFCNT_dec (old);
1097 return 0;
1098 }
1099 }
1100
1101 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1102}
1103
1104static int ecb_cold
1105coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1106{
1107 const char *s = MgPV_nolen_const (mg);
1108
1109 if (*s == '_')
1110 {
1111 SV **svp = 0;
1112
1113 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1114 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1115
1116 if (svp)
1117 {
1118 SV *old = *svp;
1119 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1120 SvREFCNT_dec (old);
1121 return 0;
1122 }
1123 }
1124
1125 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1126}
1127
1128static void
1129prepare_nop (pTHX_ struct coro_transfer_args *ta)
1130{
1131 /* kind of mega-hacky, but works */
1132 ta->next = ta->prev = (struct coro *)ta;
1133}
1134
534static void 1135static int
535setup_coro (struct coro *coro) 1136slf_check_nop (pTHX_ struct CoroSLF *frame)
1137{
1138 return 0;
1139}
1140
1141static int
1142slf_check_repeat (pTHX_ struct CoroSLF *frame)
1143{
1144 return 1;
1145}
1146
1147static UNOP init_perl_op;
1148
1149ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1150init_perl (pTHX_ struct coro *coro)
536{ 1151{
537 /* 1152 /*
538 * emulate part of the perl startup here. 1153 * emulate part of the perl startup here.
539 */ 1154 */
540
541 coro_init_stacks (); 1155 coro_init_stacks (aTHX);
542 1156
1157 PL_runops = RUNOPS_DEFAULT;
543 PL_curcop = &PL_compiling; 1158 PL_curcop = &PL_compiling;
544 PL_in_eval = EVAL_NULL; 1159 PL_in_eval = EVAL_NULL;
545 PL_comppad = 0; 1160 PL_comppad = 0;
1161 PL_comppad_name = 0;
1162 PL_comppad_name_fill = 0;
1163 PL_comppad_name_floor = 0;
546 PL_curpm = 0; 1164 PL_curpm = 0;
1165 PL_curpad = 0;
547 PL_localizing = 0; 1166 PL_localizing = 0;
548 PL_dirty = 0;
549 PL_restartop = 0; 1167 PL_restartop = 0;
1168#if PERL_VERSION_ATLEAST (5,10,0)
1169 PL_parser = 0;
1170#endif
1171 PL_hints = 0;
1172
1173 /* recreate the die/warn hooks */
1174 PL_diehook = SvREFCNT_inc (rv_diehook);
1175 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1176
1177 GvSV (PL_defgv) = newSV (0);
1178 GvAV (PL_defgv) = coro->args; coro->args = 0;
1179 GvSV (PL_errgv) = newSV (0);
1180 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1181 GvHV (PL_hintgv) = newHV ();
1182#if PERL_VERSION_ATLEAST (5,10,0)
1183 hv_magic (GvHV (PL_hintgv), 0, PERL_MAGIC_hints);
1184#endif
1185 PL_rs = newSVsv (GvSV (irsgv));
1186 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
550 1187
551 { 1188 {
552 dSP; 1189 dSP;
553 LOGOP myop; 1190 UNOP myop;
554 1191
555 SvREFCNT_dec (GvAV (PL_defgv));
556 GvAV (PL_defgv) = coro->args; coro->args = 0;
557
558 Zero (&myop, 1, LOGOP); 1192 Zero (&myop, 1, UNOP);
559 myop.op_next = Nullop; 1193 myop.op_next = Nullop;
1194 myop.op_type = OP_ENTERSUB;
560 myop.op_flags = OPf_WANT_VOID; 1195 myop.op_flags = OPf_WANT_VOID;
561 1196
562 PUSHMARK (SP); 1197 PUSHMARK (SP);
563 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE)); 1198 PUSHs ((SV *)coro->startcv);
564 PUTBACK; 1199 PUTBACK;
565 PL_op = (OP *)&myop; 1200 PL_op = (OP *)&myop;
566 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1201 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
567 SPAGAIN;
568 } 1202 }
569 1203
570 ENTER; /* necessary e.g. for dounwind */ 1204 /* this newly created coroutine might be run on an existing cctx which most
571} 1205 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1206 */
1207 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1208 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1209 slf_frame.destroy = 0;
572 1210
1211 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1212 init_perl_op.op_next = PL_op;
1213 init_perl_op.op_type = OP_ENTERSUB;
1214 init_perl_op.op_ppaddr = pp_slf;
1215 /* no flags etc. required, as an init function won't be called */
1216
1217 PL_op = (OP *)&init_perl_op;
1218
1219 /* copy throw, in case it was set before init_perl */
1220 CORO_THROW = coro->except;
1221
1222 SWAP_SVS (coro);
1223
1224 if (ecb_expect_false (enable_times))
1225 {
1226 coro_times_update ();
1227 coro_times_sub (coro);
1228 }
1229}
1230
573static void 1231static void
1232coro_unwind_stacks (pTHX)
1233{
1234 if (!IN_DESTRUCT)
1235 {
1236 /* restore all saved variables and stuff */
1237 LEAVE_SCOPE (0);
1238 assert (PL_tmps_floor == -1);
1239
1240 /* free all temporaries */
1241 FREETMPS;
1242 assert (PL_tmps_ix == -1);
1243
1244 /* unwind all extra stacks */
1245 POPSTACK_TO (PL_mainstack);
1246
1247 /* unwind main stack */
1248 dounwind (-1);
1249 }
1250}
1251
1252static void
1253destroy_perl (pTHX_ struct coro *coro)
1254{
1255 SV *svf [9];
1256
1257 {
1258 SV *old_current = SvRV (coro_current);
1259 struct coro *current = SvSTATE (old_current);
1260
1261 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1262
1263 save_perl (aTHX_ current);
1264
1265 /* this will cause transfer_check to croak on block*/
1266 SvRV_set (coro_current, (SV *)coro->hv);
1267
1268 load_perl (aTHX_ coro);
1269
1270 coro_unwind_stacks (aTHX);
1271
1272 /* restore swapped sv's */
1273 SWAP_SVS (coro);
1274
1275 coro_destruct_stacks (aTHX);
1276
1277 /* now save some sv's to be free'd later */
1278 svf [0] = GvSV (PL_defgv);
1279 svf [1] = (SV *)GvAV (PL_defgv);
1280 svf [2] = GvSV (PL_errgv);
1281 svf [3] = (SV *)PL_defoutgv;
1282 svf [4] = PL_rs;
1283 svf [5] = GvSV (irsgv);
1284 svf [6] = (SV *)GvHV (PL_hintgv);
1285 svf [7] = PL_diehook;
1286 svf [8] = PL_warnhook;
1287 assert (9 == sizeof (svf) / sizeof (*svf));
1288
1289 SvRV_set (coro_current, old_current);
1290
1291 load_perl (aTHX_ current);
1292 }
1293
1294 {
1295 unsigned int i;
1296
1297 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1298 SvREFCNT_dec (svf [i]);
1299
1300 SvREFCNT_dec (coro->saved_deffh);
1301 SvREFCNT_dec (coro->rouse_cb);
1302 SvREFCNT_dec (coro->invoke_cb);
1303 SvREFCNT_dec (coro->invoke_av);
1304 SvREFCNT_dec (coro->on_enter_xs);
1305 SvREFCNT_dec (coro->on_leave_xs);
1306 }
1307}
1308
1309ecb_inline void
574free_coro_mortal () 1310free_coro_mortal (pTHX)
575{ 1311{
576 if (coro_mortal) 1312 if (ecb_expect_true (coro_mortal))
577 { 1313 {
578 SvREFCNT_dec (coro_mortal); 1314 SvREFCNT_dec ((SV *)coro_mortal);
579 coro_mortal = 0; 1315 coro_mortal = 0;
580 } 1316 }
581} 1317}
582 1318
583/* inject a fake call to Coro::State::_cctx_init into the execution */
584static void NOINLINE
585prepare_cctx (coro_cctx *cctx)
586{
587 dSP;
588 LOGOP myop;
589
590 Zero (&myop, 1, LOGOP);
591 myop.op_next = PL_op;
592 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
593
594 PUSHMARK (SP);
595 EXTEND (SP, 2);
596 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
597 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
598 PUTBACK;
599 PL_op = (OP *)&myop;
600 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
601 SPAGAIN;
602}
603
604static void 1319static int
605coro_run (void *arg) 1320runops_trace (pTHX)
606{ 1321{
607 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1322 COP *oldcop = 0;
608 UNLOCK; 1323 int oldcxix = -2;
609 1324
610 /* 1325 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
611 * this is a _very_ stripped down perl interpreter ;) 1326 {
612 */ 1327 PERL_ASYNC_CHECK ();
1328
1329 if (cctx_current->flags & CC_TRACE_ALL)
1330 {
1331 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1332 {
1333 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1334 SV **bot, **top;
1335 AV *av = newAV (); /* return values */
1336 SV **cb;
1337 dSP;
1338
1339 GV *gv = CvGV (cx->blk_sub.cv);
1340 SV *fullname = sv_2mortal (newSV (0));
1341 if (isGV (gv))
1342 gv_efullname3 (fullname, gv, 0);
1343
1344 bot = PL_stack_base + cx->blk_oldsp + 1;
1345 top = cx->blk_gimme == G_ARRAY ? SP + 1
1346 : cx->blk_gimme == G_SCALAR ? bot + 1
1347 : bot;
1348
1349 av_extend (av, top - bot);
1350 while (bot < top)
1351 av_push (av, SvREFCNT_inc_NN (*bot++));
1352
1353 PL_runops = RUNOPS_DEFAULT;
1354 ENTER;
1355 SAVETMPS;
1356 EXTEND (SP, 3);
1357 PUSHMARK (SP);
1358 PUSHs (&PL_sv_no);
1359 PUSHs (fullname);
1360 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1361 PUTBACK;
1362 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1363 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1364 SPAGAIN;
1365 FREETMPS;
1366 LEAVE;
1367 PL_runops = runops_trace;
1368 }
1369
1370 if (oldcop != PL_curcop)
1371 {
1372 oldcop = PL_curcop;
1373
1374 if (PL_curcop != &PL_compiling)
1375 {
1376 SV **cb;
1377
1378 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB && cxstack_ix >= 0)
1379 {
1380 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1381
1382 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1383 {
1384 dSP;
1385 GV *gv = CvGV (cx->blk_sub.cv);
1386 SV *fullname = sv_2mortal (newSV (0));
1387
1388 if (isGV (gv))
1389 gv_efullname3 (fullname, gv, 0);
1390
1391 PL_runops = RUNOPS_DEFAULT;
1392 ENTER;
1393 SAVETMPS;
1394 EXTEND (SP, 3);
1395 PUSHMARK (SP);
1396 PUSHs (&PL_sv_yes);
1397 PUSHs (fullname);
1398 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1399 PUTBACK;
1400 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1401 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1402 SPAGAIN;
1403 FREETMPS;
1404 LEAVE;
1405 PL_runops = runops_trace;
1406 }
1407
1408 oldcxix = cxstack_ix;
1409 }
1410
1411 if (cctx_current->flags & CC_TRACE_LINE)
1412 {
1413 dSP;
1414
1415 PL_runops = RUNOPS_DEFAULT;
1416 ENTER;
1417 SAVETMPS;
1418 EXTEND (SP, 3);
1419 PL_runops = RUNOPS_DEFAULT;
1420 PUSHMARK (SP);
1421 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1422 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1423 PUTBACK;
1424 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1425 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1426 SPAGAIN;
1427 FREETMPS;
1428 LEAVE;
1429 PL_runops = runops_trace;
1430 }
1431 }
1432 }
1433 }
1434 }
1435
1436 TAINT_NOT;
1437 return 0;
1438}
1439
1440static struct CoroSLF cctx_ssl_frame;
1441
1442static void
1443slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1444{
1445 ta->prev = 0;
1446}
1447
1448static int
1449slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1450{
1451 *frame = cctx_ssl_frame;
1452
1453 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1454}
1455
1456/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1457static void ecb_noinline
1458cctx_prepare (pTHX)
1459{
613 PL_top_env = &PL_start_env; 1460 PL_top_env = &PL_start_env;
614 1461
1462 if (cctx_current->flags & CC_TRACE)
1463 PL_runops = runops_trace;
1464
1465 /* we already must be executing an SLF op, there is no other valid way
1466 * that can lead to creation of a new cctx */
1467 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1468 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1469
1470 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1471 cctx_ssl_frame = slf_frame;
1472
1473 slf_frame.prepare = slf_prepare_set_stacklevel;
1474 slf_frame.check = slf_check_set_stacklevel;
1475}
1476
1477/* the tail of transfer: execute stuff we can only do after a transfer */
1478ecb_inline void
1479transfer_tail (pTHX)
1480{
1481 free_coro_mortal (aTHX);
1482}
1483
1484/* try to exit the same way perl's main function would do */
1485/* we do not bother resetting the environment or other things *7
1486/* that are not, uhm, essential */
1487/* this obviously also doesn't work when perl is embedded */
1488static void ecb_noinline ecb_cold
1489perlish_exit (pTHX)
1490{
1491 int exitstatus = perl_destruct (PL_curinterp);
1492 perl_free (PL_curinterp);
1493 exit (exitstatus);
1494}
1495
1496/*
1497 * this is a _very_ stripped down perl interpreter ;)
1498 */
1499static void
1500cctx_run (void *arg)
1501{
1502#ifdef USE_ITHREADS
1503# if CORO_PTHREAD
1504 PERL_SET_CONTEXT (coro_thx);
1505# endif
1506#endif
1507 {
1508 dTHX;
1509
1510 /* normally we would need to skip the entersub here */
1511 /* not doing so will re-execute it, which is exactly what we want */
1512 /* PL_nop = PL_nop->op_next */
1513
615 /* inject call to cctx_init */ 1514 /* inject a fake subroutine call to cctx_init */
616 prepare_cctx ((coro_cctx *)arg); 1515 cctx_prepare (aTHX);
617 1516
1517 /* cctx_run is the alternative tail of transfer() */
1518 transfer_tail (aTHX);
1519
618 /* somebody will hit me for both perl_run and PL_restartop */ 1520 /* somebody or something will hit me for both perl_run and PL_restartop */
619 PL_restartop = PL_op; 1521 PL_restartop = PL_op;
620 perl_run (PL_curinterp); 1522 perl_run (PL_curinterp);
1523 /*
1524 * Unfortunately, there is no way to get at the return values of the
1525 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1526 * runtime errors here, as this is just a random interpreter, not a thread.
1527 */
621 1528
622 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1529 /*
623 abort (); 1530 * If perl-run returns we assume exit() was being called or the coro
1531 * fell off the end, which seems to be the only valid (non-bug)
1532 * reason for perl_run to return. We try to mimic whatever perl is normally
1533 * doing in that case. YMMV.
1534 */
1535 perlish_exit (aTHX);
1536 }
624} 1537}
625 1538
626static coro_cctx * 1539static coro_cctx *
627cctx_new () 1540cctx_new (void)
628{ 1541{
629 coro_cctx *cctx; 1542 coro_cctx *cctx;
630 1543
631 ++cctx_count; 1544 ++cctx_count;
632
633 Newz (0, cctx, 1, coro_cctx); 1545 New (0, cctx, 1, coro_cctx);
634 1546
635#if HAVE_MMAP 1547 cctx->gen = cctx_gen;
1548 cctx->flags = 0;
1549 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
636 1550
637 cctx->ssize = ((CORO_STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1551 return cctx;
638 /* mmap supposedly does allocate-on-write for us */ 1552}
639 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
640 1553
641 if (cctx->sptr != (void *)-1) 1554/* create a new cctx only suitable as source */
642 { 1555static coro_cctx *
643# if CORO_STACKGUARD 1556cctx_new_empty (void)
644 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1557{
645# endif 1558 coro_cctx *cctx = cctx_new ();
646 REGISTER_STACK (
647 cctx,
648 CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr,
649 cctx->ssize + (char *)cctx->sptr
650 );
651 1559
652 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize); 1560 cctx->stack.sptr = 0;
1561 coro_create (&cctx->cctx, 0, 0, 0, 0);
1562
1563 return cctx;
1564}
1565
1566/* create a new cctx suitable as destination/running a perl interpreter */
1567static coro_cctx *
1568cctx_new_run (void)
1569{
1570 coro_cctx *cctx = cctx_new ();
1571
1572 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
653 } 1573 {
654 else
655#endif
656 {
657 cctx->ssize = -CORO_STACKSIZE * (long)sizeof (long);
658 New (0, cctx->sptr, CORO_STACKSIZE, long);
659
660 if (!cctx->sptr)
661 {
662 perror ("FATAL: unable to allocate stack for coroutine"); 1574 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
663 _exit (EXIT_FAILURE); 1575 _exit (EXIT_FAILURE);
664 } 1576 }
665 1577
666 REGISTER_STACK (
667 cctx,
668 (char *)cctx->sptr,
669 (char *)cctx->sptr - cctx->ssize
670 );
671
672 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, -cctx->ssize); 1578 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
673 }
674 1579
675 return cctx; 1580 return cctx;
676} 1581}
677 1582
678static void 1583static void
679cctx_destroy (coro_cctx *cctx) 1584cctx_destroy (coro_cctx *cctx)
680{ 1585{
681 if (!cctx) 1586 if (!cctx)
682 return; 1587 return;
683 1588
1589 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1590
684 --cctx_count; 1591 --cctx_count;
1592 coro_destroy (&cctx->cctx);
685 1593
686#if CORO_USE_VALGRIND 1594 coro_stack_free (&cctx->stack);
687 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
688#endif
689
690#if HAVE_MMAP
691 if (cctx->ssize > 0)
692 munmap (cctx->sptr, cctx->ssize);
693 else
694#endif
695 Safefree (cctx->sptr);
696 1595
697 Safefree (cctx); 1596 Safefree (cctx);
698} 1597}
699 1598
1599/* wether this cctx should be destructed */
1600#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1601
700static coro_cctx * 1602static coro_cctx *
701cctx_get () 1603cctx_get (pTHX)
702{ 1604{
703 coro_cctx *cctx; 1605 while (ecb_expect_true (cctx_first))
704
705 if (cctx_first)
706 { 1606 {
707 cctx = cctx_first; 1607 coro_cctx *cctx = cctx_first;
708 cctx_first = cctx->next; 1608 cctx_first = cctx->next;
709 --cctx_idle; 1609 --cctx_idle;
710 } 1610
711 else 1611 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
712 { 1612 return cctx;
713 cctx = cctx_new (); 1613
714 PL_op = PL_op->op_next; 1614 cctx_destroy (cctx);
715 } 1615 }
716 1616
717 return cctx; 1617 return cctx_new_run ();
718} 1618}
719 1619
720static void 1620static void
721cctx_put (coro_cctx *cctx) 1621cctx_put (coro_cctx *cctx)
722{ 1622{
1623 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1624
723 /* free another cctx if overlimit */ 1625 /* free another cctx if overlimit */
724 if (cctx_idle >= MAX_IDLE_CCTX) 1626 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
725 { 1627 {
726 coro_cctx *first = cctx_first; 1628 coro_cctx *first = cctx_first;
727 cctx_first = first->next; 1629 cctx_first = first->next;
728 --cctx_idle; 1630 --cctx_idle;
729 1631
730 assert (!first->inuse);
731 cctx_destroy (first); 1632 cctx_destroy (first);
732 } 1633 }
733 1634
734 ++cctx_idle; 1635 ++cctx_idle;
735 cctx->next = cctx_first; 1636 cctx->next = cctx_first;
736 cctx_first = cctx; 1637 cctx_first = cctx;
737} 1638}
738 1639
739/** coroutine switching *****************************************************/ 1640/** coroutine switching *****************************************************/
740 1641
741/* never call directly, always through the coro_state_transfer global variable */ 1642static void
742static void NOINLINE
743transfer (struct coro *prev, struct coro *next) 1643transfer_check (pTHX_ struct coro *prev, struct coro *next)
1644{
1645 /* TODO: throwing up here is considered harmful */
1646
1647 if (ecb_expect_true (prev != next))
1648 {
1649 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1650 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1651
1652 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1653 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1654
1655#if !PERL_VERSION_ATLEAST (5,10,0)
1656 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1657 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1658#endif
1659 }
1660}
1661
1662/* always use the TRANSFER macro */
1663static void ecb_noinline /* noinline so we have a fixed stackframe */
1664transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
744{ 1665{
745 dSTACKLEVEL; 1666 dSTACKLEVEL;
746 1667
747 /* sometimes transfer is only called to set idle_sp */ 1668 /* sometimes transfer is only called to set idle_sp */
748 if (!next) 1669 if (ecb_expect_false (!prev))
749 { 1670 {
750 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1671 cctx_current->idle_sp = STACKLEVEL;
751 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1672 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
752 }
753 else if (prev != next)
754 { 1673 }
1674 else if (ecb_expect_true (prev != next))
1675 {
755 coro_cctx *prev__cctx; 1676 coro_cctx *cctx_prev;
756 1677
757 if (prev->flags & CF_NEW) 1678 if (ecb_expect_false (prev->flags & CF_NEW))
758 { 1679 {
759 /* create a new empty context */ 1680 /* create a new empty/source context */
760 Newz (0, prev->cctx, 1, coro_cctx);
761 prev->cctx->inuse = 1;
762 prev->flags &= ~CF_NEW; 1681 prev->flags &= ~CF_NEW;
763 prev->flags |= CF_RUNNING; 1682 prev->flags |= CF_RUNNING;
764 } 1683 }
765 1684
766 /*TODO: must not croak here */
767 if (!prev->flags & CF_RUNNING)
768 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
769
770 if (next->flags & CF_RUNNING)
771 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
772
773 if (next->flags & CF_DESTROYED)
774 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
775
776 prev->flags &= ~CF_RUNNING; 1685 prev->flags &= ~CF_RUNNING;
777 next->flags |= CF_RUNNING; 1686 next->flags |= CF_RUNNING;
778 1687
779 LOCK; 1688 /* first get rid of the old state */
1689 save_perl (aTHX_ prev);
780 1690
781 if (next->flags & CF_NEW) 1691 if (ecb_expect_false (next->flags & CF_NEW))
782 { 1692 {
783 /* need to start coroutine */ 1693 /* need to start coroutine */
784 next->flags &= ~CF_NEW; 1694 next->flags &= ~CF_NEW;
785 /* first get rid of the old state */
786 save_perl (prev);
787 /* setup coroutine call */ 1695 /* setup coroutine call */
788 setup_coro (next); 1696 init_perl (aTHX_ next);
789 /* need a new stack */
790 assert (!next->cctx);
791 } 1697 }
792 else 1698 else
1699 load_perl (aTHX_ next);
1700
1701 /* possibly untie and reuse the cctx */
1702 if (ecb_expect_true (
1703 cctx_current->idle_sp == STACKLEVEL
1704 && !(cctx_current->flags & CC_TRACE)
1705 && !force_cctx
1706 ))
793 { 1707 {
794 /* coroutine already started */ 1708 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
795 save_perl (prev); 1709 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
796 load_perl (next); 1710
1711 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1712 /* without this the next cctx_get might destroy the running cctx while still in use */
1713 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1714 if (ecb_expect_true (!next->cctx))
1715 next->cctx = cctx_get (aTHX);
1716
1717 cctx_put (cctx_current);
797 } 1718 }
1719 else
1720 prev->cctx = cctx_current;
798 1721
799 prev__cctx = prev->cctx; 1722 ++next->usecount;
800 1723
801 /* possibly "free" the cctx */ 1724 cctx_prev = cctx_current;
802 if (prev__cctx->idle_sp == STACKLEVEL) 1725 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1726
1727 next->cctx = 0;
1728
1729 if (ecb_expect_false (cctx_prev != cctx_current))
803 { 1730 {
804 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1731 cctx_prev->top_env = PL_top_env;
805 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1732 PL_top_env = cctx_current->top_env;
806 1733 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
807 prev->cctx = 0;
808
809 cctx_put (prev__cctx);
810 prev__cctx->inuse = 0;
811 } 1734 }
812 1735
813 if (!next->cctx) 1736 transfer_tail (aTHX);
814 {
815 next->cctx = cctx_get ();
816 assert (!next->cctx->inuse);
817 next->cctx->inuse = 1;
818 }
819
820 if (prev__cctx != next->cctx)
821 {
822 prev__cctx->top_env = PL_top_env;
823 PL_top_env = next->cctx->top_env;
824 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
825 }
826
827 free_coro_mortal ();
828 UNLOCK;
829 } 1737 }
830} 1738}
831 1739
832struct transfer_args 1740#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
833{
834 struct coro *prev, *next;
835};
836
837#define TRANSFER(ta) transfer ((ta).prev, (ta).next) 1741#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
838 1742
839/** high level stuff ********************************************************/ 1743/** high level stuff ********************************************************/
840 1744
1745/* this function is actually Coro, not Coro::State, but we call it from here */
1746/* because it is convenient - but it hasn't been declared yet for that reason */
841static int 1747static void
1748coro_call_on_destroy (pTHX_ struct coro *coro);
1749
1750static void
842coro_state_destroy (struct coro *coro) 1751coro_state_destroy (pTHX_ struct coro *coro)
843{ 1752{
844 if (coro->flags & CF_DESTROYED) 1753 if (coro->flags & CF_ZOMBIE)
845 return 0; 1754 return;
846 1755
1756 slf_destroy (aTHX_ coro);
1757
847 coro->flags |= CF_DESTROYED; 1758 coro->flags |= CF_ZOMBIE;
848 1759
849 if (coro->flags & CF_READY) 1760 if (coro->flags & CF_READY)
850 { 1761 {
851 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1762 /* reduce nready, as destroying a ready coro effectively unreadies it */
852 /* alternative: look through all ready queues and remove the coro */ 1763 /* alternative: look through all ready queues and remove the coro */
853 LOCK;
854 --coro_nready; 1764 --coro_nready;
855 UNLOCK;
856 } 1765 }
857 else 1766 else
858 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1767 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
859 1768
860 if (coro->mainstack && coro->mainstack != main_mainstack) 1769 if (coro->next) coro->next->prev = coro->prev;
861 { 1770 if (coro->prev) coro->prev->next = coro->next;
862 struct coro temp; 1771 if (coro == coro_first) coro_first = coro->next;
863 1772
864 assert (!(coro->flags & CF_RUNNING)); 1773 if (coro->mainstack
865 1774 && coro->mainstack != main_mainstack
866 Zero (&temp, 1, struct coro); 1775 && coro->slot
867 temp.save = CORO_SAVE_ALL; 1776 && !PL_dirty)
868 1777 destroy_perl (aTHX_ coro);
869 if (coro->flags & CF_RUNNING)
870 croak ("FATAL: tried to destroy currently running coroutine");
871
872 save_perl (&temp);
873 load_perl (coro);
874
875 coro_destroy_stacks ();
876
877 load_perl (&temp); /* this will get rid of defsv etc.. */
878
879 coro->mainstack = 0;
880 }
881 1778
882 cctx_destroy (coro->cctx); 1779 cctx_destroy (coro->cctx);
1780 SvREFCNT_dec (coro->startcv);
883 SvREFCNT_dec (coro->args); 1781 SvREFCNT_dec (coro->args);
1782 SvREFCNT_dec (coro->swap_sv);
1783 SvREFCNT_dec (CORO_THROW);
884 1784
885 return 1; 1785 coro_call_on_destroy (aTHX_ coro);
1786
1787 /* more destruction mayhem in coro_state_free */
886} 1788}
887 1789
888static int 1790static int
889coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1791coro_state_free (pTHX_ SV *sv, MAGIC *mg)
890{ 1792{
891 struct coro *coro = (struct coro *)mg->mg_ptr; 1793 struct coro *coro = (struct coro *)mg->mg_ptr;
892 mg->mg_ptr = 0; 1794 mg->mg_ptr = 0;
893 1795
894 if (--coro->refcnt < 0)
895 {
896 coro_state_destroy (coro); 1796 coro_state_destroy (aTHX_ coro);
1797 SvREFCNT_dec (coro->on_destroy);
1798 SvREFCNT_dec (coro->status);
1799
897 Safefree (coro); 1800 Safefree (coro);
898 }
899 1801
900 return 0; 1802 return 0;
901} 1803}
902 1804
903static int 1805static int ecb_cold
904coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1806coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
905{ 1807{
906 struct coro *coro = (struct coro *)mg->mg_ptr; 1808 /* called when perl clones the current process the slow way (windows process emulation) */
907 1809 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
908 ++coro->refcnt; 1810 mg->mg_ptr = 0;
1811 mg->mg_virtual = 0;
909 1812
910 return 0; 1813 return 0;
911} 1814}
912 1815
913static MGVTBL coro_state_vtbl = { 1816static MGVTBL coro_state_vtbl = {
… …
919#else 1822#else
920# define MGf_DUP 0 1823# define MGf_DUP 0
921#endif 1824#endif
922}; 1825};
923 1826
924static struct coro *
925SvSTATE (SV *coro)
926{
927 HV *stash;
928 MAGIC *mg;
929
930 if (SvROK (coro))
931 coro = SvRV (coro);
932
933 stash = SvSTASH (coro);
934 if (stash != coro_stash && stash != coro_state_stash)
935 {
936 /* very slow, but rare, check */
937 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
938 croak ("Coro::State object required");
939 }
940
941 mg = CORO_MAGIC (coro);
942 return (struct coro *)mg->mg_ptr;
943}
944
945static void 1827static void
946prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1828prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
947{ 1829{
948 ta->prev = SvSTATE (prev_sv); 1830 ta->prev = SvSTATE (prev_sv);
949 ta->next = SvSTATE (next_sv); 1831 ta->next = SvSTATE (next_sv);
1832 TRANSFER_CHECK (*ta);
950} 1833}
951 1834
952static void 1835static void
953api_transfer (SV *prev_sv, SV *next_sv) 1836api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
954{ 1837{
955 struct transfer_args ta; 1838 struct coro_transfer_args ta;
956 1839
957 prepare_transfer (&ta, prev_sv, next_sv); 1840 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
958 TRANSFER (ta); 1841 TRANSFER (ta, 1);
1842}
1843
1844/** Coro ********************************************************************/
1845
1846ecb_inline void
1847coro_enq (pTHX_ struct coro *coro)
1848{
1849 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1850
1851 SvREFCNT_inc_NN (coro->hv);
1852
1853 coro->next_ready = 0;
1854 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1855 ready [1] = coro;
1856}
1857
1858ecb_inline struct coro *
1859coro_deq (pTHX)
1860{
1861 int prio;
1862
1863 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1864 {
1865 struct coro **ready = coro_ready [prio];
1866
1867 if (ready [0])
1868 {
1869 struct coro *coro = ready [0];
1870 ready [0] = coro->next_ready;
1871 return coro;
1872 }
1873 }
1874
1875 return 0;
1876}
1877
1878static void
1879invoke_sv_ready_hook_helper (void)
1880{
1881 dTHX;
1882 dSP;
1883
1884 ENTER;
1885 SAVETMPS;
1886
1887 PUSHMARK (SP);
1888 PUTBACK;
1889 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1890
1891 FREETMPS;
1892 LEAVE;
959} 1893}
960 1894
961static int 1895static int
962api_save (SV *coro_sv, int new_save) 1896api_ready (pTHX_ SV *coro_sv)
963{ 1897{
964 struct coro *coro = SvSTATE (coro_sv); 1898 struct coro *coro = SvSTATE (coro_sv);
965 int old_save = coro->save;
966
967 if (new_save >= 0)
968 coro->save = new_save;
969
970 return old_save;
971}
972
973/** Coro ********************************************************************/
974
975static void
976coro_enq (SV *coro_sv)
977{
978 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
979}
980
981static SV *
982coro_deq (int min_prio)
983{
984 int prio = PRIO_MAX - PRIO_MIN;
985
986 min_prio -= PRIO_MIN;
987 if (min_prio < 0)
988 min_prio = 0;
989
990 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
991 if (AvFILLp (coro_ready [prio]) >= 0)
992 return av_shift (coro_ready [prio]);
993
994 return 0;
995}
996
997static int
998api_ready (SV *coro_sv)
999{
1000 struct coro *coro;
1001
1002 if (SvROK (coro_sv))
1003 coro_sv = SvRV (coro_sv);
1004
1005 coro = SvSTATE (coro_sv);
1006 1899
1007 if (coro->flags & CF_READY) 1900 if (coro->flags & CF_READY)
1008 return 0; 1901 return 0;
1009 1902
1010 coro->flags |= CF_READY; 1903 coro->flags |= CF_READY;
1011 1904
1012 LOCK; 1905 coro_enq (aTHX_ coro);
1013 coro_enq (SvREFCNT_inc (coro_sv)); 1906
1014 ++coro_nready; 1907 if (!coro_nready++)
1015 UNLOCK; 1908 if (coroapi.readyhook)
1909 coroapi.readyhook ();
1016 1910
1017 return 1; 1911 return 1;
1018} 1912}
1019 1913
1020static int 1914static int
1021api_is_ready (SV *coro_sv) 1915api_is_ready (pTHX_ SV *coro_sv)
1022{ 1916{
1023 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1917 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1024} 1918}
1025 1919
1920/* expects to own a reference to next->hv */
1921ecb_inline void
1922prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1923{
1924 SV *prev_sv = SvRV (coro_current);
1925
1926 ta->prev = SvSTATE_hv (prev_sv);
1927 ta->next = next;
1928
1929 TRANSFER_CHECK (*ta);
1930
1931 SvRV_set (coro_current, (SV *)next->hv);
1932
1933 free_coro_mortal (aTHX);
1934 coro_mortal = prev_sv;
1935}
1936
1026static void 1937static void
1027prepare_schedule (struct transfer_args *ta) 1938prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1028{ 1939{
1029 SV *prev_sv, *next_sv;
1030
1031 for (;;) 1940 for (;;)
1032 { 1941 {
1033 LOCK; 1942 struct coro *next = coro_deq (aTHX);
1034 next_sv = coro_deq (PRIO_MIN);
1035 1943
1944 if (ecb_expect_true (next))
1945 {
1946 /* cannot transfer to destroyed coros, skip and look for next */
1947 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1948 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1949 else
1950 {
1951 next->flags &= ~CF_READY;
1952 --coro_nready;
1953
1954 prepare_schedule_to (aTHX_ ta, next);
1955 break;
1956 }
1957 }
1958 else
1959 {
1036 /* nothing to schedule: call the idle handler */ 1960 /* nothing to schedule: call the idle handler */
1037 if (!next_sv) 1961 if (SvROK (sv_idle)
1962 && SvOBJECT (SvRV (sv_idle)))
1963 {
1964 if (SvRV (sv_idle) == SvRV (coro_current))
1965 {
1966 require_pv ("Carp");
1967
1968 {
1969 dSP;
1970
1971 ENTER;
1972 SAVETMPS;
1973
1974 PUSHMARK (SP);
1975 XPUSHs (sv_2mortal (newSVpv ("FATAL: $Coro::idle blocked itself - did you try to block inside an event loop callback? Caught", 0)));
1976 PUTBACK;
1977 call_pv ("Carp::confess", G_VOID | G_DISCARD);
1978
1979 FREETMPS;
1980 LEAVE;
1981 }
1982 }
1983
1984 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1985 api_ready (aTHX_ SvRV (sv_idle));
1986 --coro_nready;
1987 }
1988 else
1989 {
1990 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1991 dSP;
1992
1993 ENTER;
1994 SAVETMPS;
1995
1996 PUSHMARK (SP);
1997 PUTBACK;
1998 call_sv (sv_idle, G_VOID | G_DISCARD);
1999
2000 FREETMPS;
2001 LEAVE;
2002 }
2003 }
2004 }
2005}
2006
2007ecb_inline void
2008prepare_cede (pTHX_ struct coro_transfer_args *ta)
2009{
2010 api_ready (aTHX_ coro_current);
2011 prepare_schedule (aTHX_ ta);
2012}
2013
2014ecb_inline void
2015prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
2016{
2017 SV *prev = SvRV (coro_current);
2018
2019 if (coro_nready)
2020 {
2021 prepare_schedule (aTHX_ ta);
2022 api_ready (aTHX_ prev);
2023 }
2024 else
2025 prepare_nop (aTHX_ ta);
2026}
2027
2028static void
2029api_schedule (pTHX)
2030{
2031 struct coro_transfer_args ta;
2032
2033 prepare_schedule (aTHX_ &ta);
2034 TRANSFER (ta, 1);
2035}
2036
2037static void
2038api_schedule_to (pTHX_ SV *coro_sv)
2039{
2040 struct coro_transfer_args ta;
2041 struct coro *next = SvSTATE (coro_sv);
2042
2043 SvREFCNT_inc_NN (coro_sv);
2044 prepare_schedule_to (aTHX_ &ta, next);
2045}
2046
2047static int
2048api_cede (pTHX)
2049{
2050 struct coro_transfer_args ta;
2051
2052 prepare_cede (aTHX_ &ta);
2053
2054 if (ecb_expect_true (ta.prev != ta.next))
2055 {
2056 TRANSFER (ta, 1);
2057 return 1;
2058 }
2059 else
2060 return 0;
2061}
2062
2063static int
2064api_cede_notself (pTHX)
2065{
2066 if (coro_nready)
2067 {
2068 struct coro_transfer_args ta;
2069
2070 prepare_cede_notself (aTHX_ &ta);
2071 TRANSFER (ta, 1);
2072 return 1;
2073 }
2074 else
2075 return 0;
2076}
2077
2078static void
2079api_trace (pTHX_ SV *coro_sv, int flags)
2080{
2081 struct coro *coro = SvSTATE (coro_sv);
2082
2083 if (coro->flags & CF_RUNNING)
2084 croak ("cannot enable tracing on a running coroutine, caught");
2085
2086 if (flags & CC_TRACE)
2087 {
2088 if (!coro->cctx)
2089 coro->cctx = cctx_new_run ();
2090 else if (!(coro->cctx->flags & CC_TRACE))
2091 croak ("cannot enable tracing on coroutine with custom stack, caught");
2092
2093 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2094 }
2095 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2096 {
2097 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2098
2099 if (coro->flags & CF_RUNNING)
2100 PL_runops = RUNOPS_DEFAULT;
2101 else
2102 coro->slot->runops = RUNOPS_DEFAULT;
2103 }
2104}
2105
2106static void
2107coro_push_av (pTHX_ AV *av, I32 gimme_v)
2108{
2109 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2110 {
2111 dSP;
2112
2113 if (gimme_v == G_SCALAR)
2114 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2115 else
2116 {
2117 int i;
2118 EXTEND (SP, AvFILLp (av) + 1);
2119
2120 for (i = 0; i <= AvFILLp (av); ++i)
2121 PUSHs (AvARRAY (av)[i]);
2122 }
2123
2124 PUTBACK;
2125 }
2126}
2127
2128static void
2129coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2130{
2131 if (!coro->on_destroy)
2132 coro->on_destroy = newAV ();
2133
2134 av_push (coro->on_destroy, cb);
2135}
2136
2137static void
2138slf_destroy_join (pTHX_ struct CoroSLF *frame)
2139{
2140 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2141}
2142
2143static int
2144slf_check_join (pTHX_ struct CoroSLF *frame)
2145{
2146 struct coro *coro = (struct coro *)frame->data;
2147
2148 if (!coro->status)
2149 return 1;
2150
2151 frame->destroy = 0;
2152
2153 coro_push_av (aTHX_ coro->status, GIMME_V);
2154
2155 SvREFCNT_dec ((SV *)coro->hv);
2156
2157 return 0;
2158}
2159
2160static void
2161slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2162{
2163 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2164
2165 if (items > 1)
2166 croak ("join called with too many arguments");
2167
2168 if (coro->status)
2169 frame->prepare = prepare_nop;
2170 else
2171 {
2172 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2173 frame->prepare = prepare_schedule;
2174 }
2175
2176 frame->check = slf_check_join;
2177 frame->destroy = slf_destroy_join;
2178 frame->data = (void *)coro;
2179 SvREFCNT_inc (coro->hv);
2180}
2181
2182static void
2183coro_call_on_destroy (pTHX_ struct coro *coro)
2184{
2185 AV *od = coro->on_destroy;
2186
2187 if (!od)
2188 return;
2189
2190 coro->on_destroy = 0;
2191 sv_2mortal ((SV *)od);
2192
2193 while (AvFILLp (od) >= 0)
2194 {
2195 SV *cb = sv_2mortal (av_pop (od));
2196
2197 /* coro hv's (and only hv's at the moment) are supported as well */
2198 if (SvSTATEhv_p (aTHX_ cb))
2199 api_ready (aTHX_ cb);
2200 else
2201 {
2202 dSP; /* don't disturb outer sp */
2203 PUSHMARK (SP);
2204
2205 if (coro->status)
2206 {
2207 PUTBACK;
2208 coro_push_av (aTHX_ coro->status, G_ARRAY);
2209 SPAGAIN;
2210 }
2211
2212 PUTBACK;
2213 call_sv (cb, G_VOID | G_DISCARD);
2214 }
2215 }
2216}
2217
2218static void
2219coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2220{
2221 AV *av;
2222
2223 if (coro->status)
2224 {
2225 av = coro->status;
2226 av_clear (av);
2227 }
2228 else
2229 av = coro->status = newAV ();
2230
2231 /* items are actually not so common, so optimise for this case */
2232 if (items)
2233 {
2234 int i;
2235
2236 av_extend (av, items - 1);
2237
2238 for (i = 0; i < items; ++i)
2239 av_push (av, SvREFCNT_inc_NN (arg [i]));
2240 }
2241}
2242
2243static void
2244slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2245{
2246 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2247 api_ready (aTHX_ sv_manager);
2248
2249 frame->prepare = prepare_schedule;
2250 frame->check = slf_check_repeat;
2251
2252 /* as a minor optimisation, we could unwind all stacks here */
2253 /* but that puts extra pressure on pp_slf, and is not worth much */
2254 /*coro_unwind_stacks (aTHX);*/
2255}
2256
2257static void
2258slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2259{
2260 HV *coro_hv = (HV *)SvRV (coro_current);
2261
2262 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2263 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2264}
2265
2266static void
2267slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2268{
2269 HV *coro_hv;
2270 struct coro *coro;
2271
2272 if (items <= 0)
2273 croak ("Coro::cancel called without coro object,");
2274
2275 coro = SvSTATE (arg [0]);
2276 coro_hv = coro->hv;
2277
2278 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2279
2280 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2281 {
2282 /* coro currently busy cancelling something, so just notify it */
2283 coro->slf_frame.data = (void *)coro;
2284
2285 frame->prepare = prepare_nop;
2286 frame->check = slf_check_nop;
2287 }
2288 else if (coro_hv == (HV *)SvRV (coro_current))
2289 {
2290 /* cancelling the current coro is allowed, and equals terminate */
2291 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2292 }
2293 else
2294 {
2295 struct coro *self = SvSTATE_current;
2296
2297 if (!self)
2298 croak ("Coro::cancel called outside of thread content,");
2299
2300 /* otherwise we cancel directly, purely for speed reasons
2301 * unfortunately, this requires some magic trickery, as
2302 * somebody else could cancel us, so we have to fight the cancellation.
2303 * this is ugly, and hopefully fully worth the extra speed.
2304 * besides, I can't get the slow-but-safe version working...
2305 */
2306 slf_frame.data = 0;
2307 self->flags |= CF_NOCANCEL;
2308 coro_state_destroy (aTHX_ coro);
2309 self->flags &= ~CF_NOCANCEL;
2310
2311 if (slf_frame.data)
2312 {
2313 /* while we were busy we have been cancelled, so terminate */
2314 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2315 }
2316 else
2317 {
2318 frame->prepare = prepare_nop;
2319 frame->check = slf_check_nop;
2320 }
2321 }
2322}
2323
2324static int
2325slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2326{
2327 frame->prepare = 0;
2328 coro_unwind_stacks (aTHX);
2329
2330 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2331
2332 return 1;
2333}
2334
2335static int
2336safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2337{
2338 if (coro->cctx)
2339 croak ("coro inside C callback, unable to cancel at this time, caught");
2340
2341 if (coro->flags & CF_NEW)
2342 {
2343 coro_set_status (aTHX_ coro, arg, items);
2344 coro_state_destroy (aTHX_ coro);
2345 }
2346 else
2347 {
2348 if (!coro->slf_frame.prepare)
2349 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2350
2351 slf_destroy (aTHX_ coro);
2352
2353 coro_set_status (aTHX_ coro, arg, items);
2354 coro->slf_frame.prepare = prepare_nop;
2355 coro->slf_frame.check = slf_check_safe_cancel;
2356
2357 api_ready (aTHX_ (SV *)coro->hv);
2358 }
2359
2360 return 1;
2361}
2362
2363/*****************************************************************************/
2364/* async pool handler */
2365
2366static int
2367slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2368{
2369 HV *hv = (HV *)SvRV (coro_current);
2370 struct coro *coro = (struct coro *)frame->data;
2371
2372 if (!coro->invoke_cb)
2373 return 1; /* loop till we have invoke */
2374 else
2375 {
2376 hv_store (hv, "desc", sizeof ("desc") - 1,
2377 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2378
2379 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2380
2381 {
2382 dSP;
2383 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2384 PUTBACK;
2385 }
2386
2387 SvREFCNT_dec (GvAV (PL_defgv));
2388 GvAV (PL_defgv) = coro->invoke_av;
2389 coro->invoke_av = 0;
2390
2391 return 0;
2392 }
2393}
2394
2395static void
2396slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2397{
2398 HV *hv = (HV *)SvRV (coro_current);
2399 struct coro *coro = SvSTATE_hv ((SV *)hv);
2400
2401 if (ecb_expect_true (coro->saved_deffh))
2402 {
2403 /* subsequent iteration */
2404 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2405 coro->saved_deffh = 0;
2406
2407 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2408 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2409 {
2410 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2411 return;
2412 }
2413 else
2414 {
2415 av_clear (GvAV (PL_defgv));
2416 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2417
2418 coro->prio = 0;
2419
2420 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2421 api_trace (aTHX_ coro_current, 0);
2422
2423 frame->prepare = prepare_schedule;
2424 av_push (av_async_pool, SvREFCNT_inc (hv));
2425 }
2426 }
2427 else
2428 {
2429 /* first iteration, simply fall through */
2430 frame->prepare = prepare_nop;
2431 }
2432
2433 frame->check = slf_check_pool_handler;
2434 frame->data = (void *)coro;
2435}
2436
2437/*****************************************************************************/
2438/* rouse callback */
2439
2440#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2441
2442static void
2443coro_rouse_callback (pTHX_ CV *cv)
2444{
2445 dXSARGS;
2446 SV *data = (SV *)S_GENSUB_ARG;
2447
2448 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2449 {
2450 /* first call, set args */
2451 SV *coro = SvRV (data);
2452 AV *av = newAV ();
2453
2454 SvRV_set (data, (SV *)av);
2455
2456 /* better take a full copy of the arguments */
2457 while (items--)
2458 av_store (av, items, newSVsv (ST (items)));
2459
2460 api_ready (aTHX_ coro);
2461 SvREFCNT_dec (coro);
2462 }
2463
2464 XSRETURN_EMPTY;
2465}
2466
2467static int
2468slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2469{
2470 SV *data = (SV *)frame->data;
2471
2472 if (CORO_THROW)
2473 return 0;
2474
2475 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2476 return 1;
2477
2478 /* now push all results on the stack */
2479 {
2480 dSP;
2481 AV *av = (AV *)SvRV (data);
2482 int i;
2483
2484 EXTEND (SP, AvFILLp (av) + 1);
2485 for (i = 0; i <= AvFILLp (av); ++i)
2486 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2487
2488 /* we have stolen the elements, so set length to zero and free */
2489 AvFILLp (av) = -1;
2490 av_undef (av);
2491
2492 PUTBACK;
2493 }
2494
2495 return 0;
2496}
2497
2498static void
2499slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2500{
2501 SV *cb;
2502
2503 if (items)
2504 cb = arg [0];
2505 else
2506 {
2507 struct coro *coro = SvSTATE_current;
2508
2509 if (!coro->rouse_cb)
2510 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2511
2512 cb = sv_2mortal (coro->rouse_cb);
2513 coro->rouse_cb = 0;
2514 }
2515
2516 if (!SvROK (cb)
2517 || SvTYPE (SvRV (cb)) != SVt_PVCV
2518 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2519 croak ("Coro::rouse_wait called with illegal callback argument,");
2520
2521 {
2522 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2523 SV *data = (SV *)S_GENSUB_ARG;
2524
2525 frame->data = (void *)data;
2526 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2527 frame->check = slf_check_rouse_wait;
2528 }
2529}
2530
2531static SV *
2532coro_new_rouse_cb (pTHX)
2533{
2534 HV *hv = (HV *)SvRV (coro_current);
2535 struct coro *coro = SvSTATE_hv (hv);
2536 SV *data = newRV_inc ((SV *)hv);
2537 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2538
2539 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2540 SvREFCNT_dec (data); /* magicext increases the refcount */
2541
2542 SvREFCNT_dec (coro->rouse_cb);
2543 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2544
2545 return cb;
2546}
2547
2548/*****************************************************************************/
2549/* schedule-like-function opcode (SLF) */
2550
2551static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2552static const CV *slf_cv;
2553static SV **slf_argv;
2554static int slf_argc, slf_arga; /* count, allocated */
2555static I32 slf_ax; /* top of stack, for restore */
2556
2557/* this restores the stack in the case we patched the entersub, to */
2558/* recreate the stack frame as perl will on following calls */
2559/* since entersub cleared the stack */
2560static OP *
2561pp_restore (pTHX)
2562{
2563 int i;
2564 SV **SP = PL_stack_base + slf_ax;
2565
2566 PUSHMARK (SP);
2567
2568 EXTEND (SP, slf_argc + 1);
2569
2570 for (i = 0; i < slf_argc; ++i)
2571 PUSHs (sv_2mortal (slf_argv [i]));
2572
2573 PUSHs ((SV *)CvGV (slf_cv));
2574
2575 RETURNOP (slf_restore.op_first);
2576}
2577
2578static void
2579slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2580{
2581 SV **arg = (SV **)slf_frame.data;
2582
2583 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2584}
2585
2586static void
2587slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2588{
2589 if (items != 2)
2590 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2591
2592 frame->prepare = slf_prepare_transfer;
2593 frame->check = slf_check_nop;
2594 frame->data = (void *)arg; /* let's hope it will stay valid */
2595}
2596
2597static void
2598slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2599{
2600 frame->prepare = prepare_schedule;
2601 frame->check = slf_check_nop;
2602}
2603
2604static void
2605slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2606{
2607 struct coro *next = (struct coro *)slf_frame.data;
2608
2609 SvREFCNT_inc_NN (next->hv);
2610 prepare_schedule_to (aTHX_ ta, next);
2611}
2612
2613static void
2614slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2615{
2616 if (!items)
2617 croak ("Coro::schedule_to expects a coroutine argument, caught");
2618
2619 frame->data = (void *)SvSTATE (arg [0]);
2620 frame->prepare = slf_prepare_schedule_to;
2621 frame->check = slf_check_nop;
2622}
2623
2624static void
2625slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2626{
2627 api_ready (aTHX_ SvRV (coro_current));
2628
2629 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2630}
2631
2632static void
2633slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2634{
2635 frame->prepare = prepare_cede;
2636 frame->check = slf_check_nop;
2637}
2638
2639static void
2640slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2641{
2642 frame->prepare = prepare_cede_notself;
2643 frame->check = slf_check_nop;
2644}
2645
2646/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2647static void
2648slf_destroy (pTHX_ struct coro *coro)
2649{
2650 struct CoroSLF frame = coro->slf_frame;
2651
2652 /*
2653 * The on_destroy below most likely is from an SLF call.
2654 * Since by definition the SLF call will not finish when we destroy
2655 * the coro, we will have to force-finish it here, otherwise
2656 * cleanup functions cannot call SLF functions.
2657 */
2658 coro->slf_frame.prepare = 0;
2659
2660 /* this callback is reserved for slf functions needing to do cleanup */
2661 if (frame.destroy && frame.prepare && !PL_dirty)
2662 frame.destroy (aTHX_ &frame);
2663}
2664
2665/*
2666 * these not obviously related functions are all rolled into one
2667 * function to increase chances that they all will call transfer with the same
2668 * stack offset
2669 * SLF stands for "schedule-like-function".
2670 */
2671static OP *
2672pp_slf (pTHX)
2673{
2674 I32 checkmark; /* mark SP to see how many elements check has pushed */
2675
2676 /* set up the slf frame, unless it has already been set-up */
2677 /* the latter happens when a new coro has been started */
2678 /* or when a new cctx was attached to an existing coroutine */
2679 if (ecb_expect_true (!slf_frame.prepare))
2680 {
2681 /* first iteration */
2682 dSP;
2683 SV **arg = PL_stack_base + TOPMARK + 1;
2684 int items = SP - arg; /* args without function object */
2685 SV *gv = *sp;
2686
2687 /* do a quick consistency check on the "function" object, and if it isn't */
2688 /* for us, divert to the real entersub */
2689 if (SvTYPE (gv) != SVt_PVGV
2690 || !GvCV (gv)
2691 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2692 return PL_ppaddr[OP_ENTERSUB](aTHX);
2693
2694 if (!(PL_op->op_flags & OPf_STACKED))
2695 {
2696 /* ampersand-form of call, use @_ instead of stack */
2697 AV *av = GvAV (PL_defgv);
2698 arg = AvARRAY (av);
2699 items = AvFILLp (av) + 1;
2700 }
2701
2702 /* now call the init function, which needs to set up slf_frame */
2703 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2704 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2705
2706 /* pop args */
2707 SP = PL_stack_base + POPMARK;
2708
2709 PUTBACK;
2710 }
2711
2712 /* now that we have a slf_frame, interpret it! */
2713 /* we use a callback system not to make the code needlessly */
2714 /* complicated, but so we can run multiple perl coros from one cctx */
2715
2716 do
2717 {
2718 struct coro_transfer_args ta;
2719
2720 slf_frame.prepare (aTHX_ &ta);
2721 TRANSFER (ta, 0);
2722
2723 checkmark = PL_stack_sp - PL_stack_base;
2724 }
2725 while (slf_frame.check (aTHX_ &slf_frame));
2726
2727 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2728
2729 /* exception handling */
2730 if (ecb_expect_false (CORO_THROW))
2731 {
2732 SV *exception = sv_2mortal (CORO_THROW);
2733
2734 CORO_THROW = 0;
2735 sv_setsv (ERRSV, exception);
2736 croak (0);
2737 }
2738
2739 /* return value handling - mostly like entersub */
2740 /* make sure we put something on the stack in scalar context */
2741 if (GIMME_V == G_SCALAR
2742 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2743 {
2744 dSP;
2745 SV **bot = PL_stack_base + checkmark;
2746
2747 if (sp == bot) /* too few, push undef */
2748 bot [1] = &PL_sv_undef;
2749 else /* too many, take last one */
2750 bot [1] = *sp;
2751
2752 SP = bot + 1;
2753
2754 PUTBACK;
2755 }
2756
2757 return NORMAL;
2758}
2759
2760static void
2761api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2762{
2763 int i;
2764 SV **arg = PL_stack_base + ax;
2765 int items = PL_stack_sp - arg + 1;
2766
2767 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2768
2769 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2770 && PL_op->op_ppaddr != pp_slf)
2771 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2772
2773 CvFLAGS (cv) |= CVf_SLF;
2774 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2775 slf_cv = cv;
2776
2777 /* we patch the op, and then re-run the whole call */
2778 /* we have to put the same argument on the stack for this to work */
2779 /* and this will be done by pp_restore */
2780 slf_restore.op_next = (OP *)&slf_restore;
2781 slf_restore.op_type = OP_CUSTOM;
2782 slf_restore.op_ppaddr = pp_restore;
2783 slf_restore.op_first = PL_op;
2784
2785 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2786
2787 if (PL_op->op_flags & OPf_STACKED)
2788 {
2789 if (items > slf_arga)
2790 {
2791 slf_arga = items;
2792 Safefree (slf_argv);
2793 New (0, slf_argv, slf_arga, SV *);
2794 }
2795
2796 slf_argc = items;
2797
2798 for (i = 0; i < items; ++i)
2799 slf_argv [i] = SvREFCNT_inc (arg [i]);
2800 }
2801 else
2802 slf_argc = 0;
2803
2804 PL_op->op_ppaddr = pp_slf;
2805 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2806
2807 PL_op = (OP *)&slf_restore;
2808}
2809
2810/*****************************************************************************/
2811/* dynamic wind */
2812
2813static void
2814on_enterleave_call (pTHX_ SV *cb)
2815{
2816 dSP;
2817
2818 PUSHSTACK;
2819
2820 PUSHMARK (SP);
2821 PUTBACK;
2822 call_sv (cb, G_VOID | G_DISCARD);
2823 SPAGAIN;
2824
2825 POPSTACK;
2826}
2827
2828static SV *
2829coro_avp_pop_and_free (pTHX_ AV **avp)
2830{
2831 AV *av = *avp;
2832 SV *res = av_pop (av);
2833
2834 if (AvFILLp (av) < 0)
2835 {
2836 *avp = 0;
2837 SvREFCNT_dec (av);
2838 }
2839
2840 return res;
2841}
2842
2843static void
2844coro_pop_on_enter (pTHX_ void *coro)
2845{
2846 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2847 SvREFCNT_dec (cb);
2848}
2849
2850static void
2851coro_pop_on_leave (pTHX_ void *coro)
2852{
2853 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2854 on_enterleave_call (aTHX_ sv_2mortal (cb));
2855}
2856
2857static void
2858enterleave_hook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, void *arg)
2859{
2860 if (!hook)
2861 return;
2862
2863 if (!*avp)
2864 {
2865 *avp = newAV ();
2866 AvREAL_off (*avp);
2867 }
2868
2869 av_push (*avp, (SV *)hook);
2870 av_push (*avp, (SV *)arg);
2871}
2872
2873static void
2874enterleave_unhook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, int execute)
2875{
2876 AV *av = *avp;
2877 int i;
2878
2879 if (!av)
2880 return;
2881
2882 for (i = AvFILLp (av) - 1; i >= 0; i -= 2)
2883 if (AvARRAY (av)[i] == (SV *)hook)
2884 {
2885 if (execute)
2886 hook (aTHX_ (void *)AvARRAY (av)[i + 1]);
2887
2888 memmove (AvARRAY (av) + i, AvARRAY (av) + i + 2, AvFILLp (av) - i - 1);
2889 av_pop (av);
2890 av_pop (av);
2891 break;
2892 }
2893
2894 if (AvFILLp (av) >= 0)
2895 {
2896 *avp = 0;
2897 SvREFCNT_dec_NN (av);
2898 }
2899}
2900
2901static void
2902api_enterleave_hook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2903{
2904 struct coro *coro = SvSTATE (coro_sv);
2905
2906 if (SvSTATE_current == coro)
2907 if (enter)
2908 enter (aTHX_ enter_arg);
2909
2910 enterleave_hook_xs (aTHX_ coro, &coro->on_enter_xs, enter, enter_arg);
2911 enterleave_hook_xs (aTHX_ coro, &coro->on_leave_xs, leave, leave_arg);
2912}
2913
2914static void
2915api_enterleave_unhook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, coro_enterleave_hook leave)
2916{
2917 struct coro *coro = SvSTATE (coro_sv);
2918
2919 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2920 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, SvSTATE_current == coro);
2921}
2922
2923static void
2924savedestructor_unhook_enter (pTHX_ coro_enterleave_hook enter)
2925{
2926 struct coro *coro = SvSTATE_current;
2927
2928 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2929}
2930
2931static void
2932savedestructor_unhook_leave (pTHX_ coro_enterleave_hook leave)
2933{
2934 struct coro *coro = SvSTATE_current;
2935
2936 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, 1);
2937}
2938
2939static void
2940api_enterleave_scope_hook (pTHX_ coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2941{
2942 api_enterleave_hook (aTHX_ coro_current, enter, enter_arg, leave, leave_arg);
2943
2944 /* this ought to be much cheaper than malloc + a single destructor call */
2945 if (enter) SAVEDESTRUCTOR_X (savedestructor_unhook_enter, enter);
2946 if (leave) SAVEDESTRUCTOR_X (savedestructor_unhook_leave, leave);
2947}
2948
2949/*****************************************************************************/
2950/* PerlIO::cede */
2951
2952typedef struct
2953{
2954 PerlIOBuf base;
2955 NV next, every;
2956} PerlIOCede;
2957
2958static IV ecb_cold
2959PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2960{
2961 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2962
2963 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2964 self->next = nvtime () + self->every;
2965
2966 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2967}
2968
2969static SV * ecb_cold
2970PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2971{
2972 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2973
2974 return newSVnv (self->every);
2975}
2976
2977static IV
2978PerlIOCede_flush (pTHX_ PerlIO *f)
2979{
2980 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2981 double now = nvtime ();
2982
2983 if (now >= self->next)
2984 {
2985 api_cede (aTHX);
2986 self->next = now + self->every;
2987 }
2988
2989 return PerlIOBuf_flush (aTHX_ f);
2990}
2991
2992static PerlIO_funcs PerlIO_cede =
2993{
2994 sizeof(PerlIO_funcs),
2995 "cede",
2996 sizeof(PerlIOCede),
2997 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2998 PerlIOCede_pushed,
2999 PerlIOBuf_popped,
3000 PerlIOBuf_open,
3001 PerlIOBase_binmode,
3002 PerlIOCede_getarg,
3003 PerlIOBase_fileno,
3004 PerlIOBuf_dup,
3005 PerlIOBuf_read,
3006 PerlIOBuf_unread,
3007 PerlIOBuf_write,
3008 PerlIOBuf_seek,
3009 PerlIOBuf_tell,
3010 PerlIOBuf_close,
3011 PerlIOCede_flush,
3012 PerlIOBuf_fill,
3013 PerlIOBase_eof,
3014 PerlIOBase_error,
3015 PerlIOBase_clearerr,
3016 PerlIOBase_setlinebuf,
3017 PerlIOBuf_get_base,
3018 PerlIOBuf_bufsiz,
3019 PerlIOBuf_get_ptr,
3020 PerlIOBuf_get_cnt,
3021 PerlIOBuf_set_ptrcnt,
3022};
3023
3024/*****************************************************************************/
3025/* Coro::Semaphore & Coro::Signal */
3026
3027static SV *
3028coro_waitarray_new (pTHX_ int count)
3029{
3030 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
3031 AV *av = newAV ();
3032 SV **ary;
3033
3034 /* unfortunately, building manually saves memory */
3035 Newx (ary, 2, SV *);
3036 AvALLOC (av) = ary;
3037#if PERL_VERSION_ATLEAST (5,10,0)
3038 AvARRAY (av) = ary;
3039#else
3040 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
3041 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
3042 SvPVX ((SV *)av) = (char *)ary;
3043#endif
3044 AvMAX (av) = 1;
3045 AvFILLp (av) = 0;
3046 ary [0] = newSViv (count);
3047
3048 return newRV_noinc ((SV *)av);
3049}
3050
3051/* semaphore */
3052
3053static void
3054coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
3055{
3056 SV *count_sv = AvARRAY (av)[0];
3057 IV count = SvIVX (count_sv);
3058
3059 count += adjust;
3060 SvIVX (count_sv) = count;
3061
3062 /* now wake up as many waiters as are expected to lock */
3063 while (count > 0 && AvFILLp (av) > 0)
3064 {
3065 SV *cb;
3066
3067 /* swap first two elements so we can shift a waiter */
3068 AvARRAY (av)[0] = AvARRAY (av)[1];
3069 AvARRAY (av)[1] = count_sv;
3070 cb = av_shift (av);
3071
3072 if (SvOBJECT (cb))
3073 {
3074 api_ready (aTHX_ cb);
3075 --count;
3076 }
3077 else if (SvTYPE (cb) == SVt_PVCV)
1038 { 3078 {
1039 dSP; 3079 dSP;
1040 UNLOCK;
1041
1042 ENTER;
1043 SAVETMPS;
1044
1045 PUSHMARK (SP); 3080 PUSHMARK (SP);
3081 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1046 PUTBACK; 3082 PUTBACK;
1047 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 3083 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1048
1049 FREETMPS;
1050 LEAVE;
1051 continue;
1052 } 3084 }
1053 3085
1054 ta->next = SvSTATE (next_sv); 3086 SvREFCNT_dec_NN (cb);
3087 }
3088}
1055 3089
1056 /* cannot transfer to destroyed coros, skip and look for next */ 3090static void
1057 if (ta->next->flags & CF_DESTROYED) 3091coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
3092{
3093 /* call $sem->adjust (0) to possibly wake up some other waiters */
3094 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
3095}
3096
3097static int
3098slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
3099{
3100 AV *av = (AV *)frame->data;
3101 SV *count_sv = AvARRAY (av)[0];
3102 SV *coro_hv = SvRV (coro_current);
3103
3104 frame->destroy = 0;
3105
3106 /* if we are about to throw, don't actually acquire the lock, just throw */
3107 if (ecb_expect_false (CORO_THROW))
3108 {
3109 /* we still might be responsible for the semaphore, so wake up others */
3110 coro_semaphore_adjust (aTHX_ av, 0);
3111
3112 return 0;
3113 }
3114 else if (SvIVX (count_sv) > 0)
3115 {
3116 if (acquire)
3117 SvIVX (count_sv) = SvIVX (count_sv) - 1;
3118 else
3119 coro_semaphore_adjust (aTHX_ av, 0);
3120
3121 return 0;
3122 }
3123 else
3124 {
3125 int i;
3126 /* if we were woken up but can't down, we look through the whole */
3127 /* waiters list and only add us if we aren't in there already */
3128 /* this avoids some degenerate memory usage cases */
3129 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
3130 if (AvARRAY (av)[i] == coro_hv)
3131 return 1;
3132
3133 av_push (av, SvREFCNT_inc (coro_hv));
3134 return 1;
3135 }
3136}
3137
3138static int
3139slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
3140{
3141 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
3142}
3143
3144static int
3145slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
3146{
3147 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3148}
3149
3150static void
3151slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3152{
3153 AV *av = (AV *)SvRV (arg [0]);
3154
3155 if (SvIVX (AvARRAY (av)[0]) > 0)
3156 {
3157 frame->data = (void *)av;
3158 frame->prepare = prepare_nop;
3159 }
3160 else
3161 {
3162 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3163
3164 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3165 frame->prepare = prepare_schedule;
3166 /* to avoid race conditions when a woken-up coro gets terminated */
3167 /* we arrange for a temporary on_destroy that calls adjust (0) */
3168 frame->destroy = coro_semaphore_destroy;
3169 }
3170}
3171
3172static void
3173slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3174{
3175 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3176 frame->check = slf_check_semaphore_down;
3177}
3178
3179static void
3180slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3181{
3182 if (items >= 2)
3183 {
3184 /* callback form */
3185 AV *av = (AV *)SvRV (arg [0]);
3186 SV *cb_cv = s_get_cv_croak (arg [1]);
3187
3188 av_push (av, SvREFCNT_inc_NN (cb_cv));
3189
3190 if (SvIVX (AvARRAY (av)[0]) > 0)
3191 coro_semaphore_adjust (aTHX_ av, 0);
3192
3193 frame->prepare = prepare_nop;
3194 frame->check = slf_check_nop;
3195 }
3196 else
3197 {
3198 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3199 frame->check = slf_check_semaphore_wait;
3200 }
3201}
3202
3203/* signal */
3204
3205static void
3206coro_signal_wake (pTHX_ AV *av, int count)
3207{
3208 SvIVX (AvARRAY (av)[0]) = 0;
3209
3210 /* now signal count waiters */
3211 while (count > 0 && AvFILLp (av) > 0)
3212 {
3213 SV *cb;
3214
3215 /* swap first two elements so we can shift a waiter */
3216 cb = AvARRAY (av)[0];
3217 AvARRAY (av)[0] = AvARRAY (av)[1];
3218 AvARRAY (av)[1] = cb;
3219
3220 cb = av_shift (av);
3221
3222 if (SvTYPE (cb) == SVt_PVCV)
1058 { 3223 {
3224 dSP;
3225 PUSHMARK (SP);
3226 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1059 UNLOCK; 3227 PUTBACK;
1060 SvREFCNT_dec (next_sv); 3228 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1061 /* coro_nready is already taken care of by destroy */
1062 continue;
1063 } 3229 }
3230 else
3231 {
3232 api_ready (aTHX_ cb);
3233 sv_setiv (cb, 0); /* signal waiter */
3234 }
1064 3235
1065 --coro_nready; 3236 SvREFCNT_dec_NN (cb);
1066 UNLOCK;
1067 break;
1068 }
1069 3237
1070 /* free this only after the transfer */ 3238 --count;
1071 prev_sv = SvRV (coro_current); 3239 }
1072 SvRV_set (coro_current, next_sv);
1073 ta->prev = SvSTATE (prev_sv);
1074
1075 assert (ta->next->flags & CF_READY);
1076 ta->next->flags &= ~CF_READY;
1077
1078 LOCK;
1079 free_coro_mortal ();
1080 coro_mortal = prev_sv;
1081 UNLOCK;
1082}
1083
1084static void
1085prepare_cede (struct transfer_args *ta)
1086{
1087 api_ready (coro_current);
1088 prepare_schedule (ta);
1089} 3240}
1090 3241
1091static int 3242static int
1092prepare_cede_notself (struct transfer_args *ta) 3243slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
1093{ 3244{
1094 if (coro_nready) 3245 /* if we are about to throw, also stop waiting */
3246 return SvROK ((SV *)frame->data) && !CORO_THROW;
3247}
3248
3249static void
3250slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3251{
3252 AV *av = (AV *)SvRV (arg [0]);
3253
3254 if (items >= 2)
3255 {
3256 SV *cb_cv = s_get_cv_croak (arg [1]);
3257 av_push (av, SvREFCNT_inc_NN (cb_cv));
3258
3259 if (SvIVX (AvARRAY (av)[0]))
3260 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3261
3262 frame->prepare = prepare_nop;
3263 frame->check = slf_check_nop;
1095 { 3264 }
1096 SV *prev = SvRV (coro_current); 3265 else if (SvIVX (AvARRAY (av)[0]))
1097 prepare_schedule (ta); 3266 {
1098 api_ready (prev); 3267 SvIVX (AvARRAY (av)[0]) = 0;
1099 return 1; 3268 frame->prepare = prepare_nop;
3269 frame->check = slf_check_nop;
1100 } 3270 }
1101 else 3271 else
3272 {
3273 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3274
3275 av_push (av, waiter);
3276
3277 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3278 frame->prepare = prepare_schedule;
3279 frame->check = slf_check_signal_wait;
3280 }
3281}
3282
3283/*****************************************************************************/
3284/* Coro::AIO */
3285
3286#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3287
3288/* helper storage struct */
3289struct io_state
3290{
3291 int errorno;
3292 I32 laststype; /* U16 in 5.10.0 */
3293 int laststatval;
3294 Stat_t statcache;
3295};
3296
3297static void
3298coro_aio_callback (pTHX_ CV *cv)
3299{
3300 dXSARGS;
3301 AV *state = (AV *)S_GENSUB_ARG;
3302 SV *coro = av_pop (state);
3303 SV *data_sv = newSV (sizeof (struct io_state));
3304
3305 av_extend (state, items - 1);
3306
3307 sv_upgrade (data_sv, SVt_PV);
3308 SvCUR_set (data_sv, sizeof (struct io_state));
3309 SvPOK_only (data_sv);
3310
3311 {
3312 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3313
3314 data->errorno = errno;
3315 data->laststype = PL_laststype;
3316 data->laststatval = PL_laststatval;
3317 data->statcache = PL_statcache;
3318 }
3319
3320 /* now build the result vector out of all the parameters and the data_sv */
3321 {
3322 int i;
3323
3324 for (i = 0; i < items; ++i)
3325 av_push (state, SvREFCNT_inc_NN (ST (i)));
3326 }
3327
3328 av_push (state, data_sv);
3329
3330 api_ready (aTHX_ coro);
3331 SvREFCNT_dec_NN (coro);
3332 SvREFCNT_dec_NN ((AV *)state);
3333}
3334
3335static int
3336slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3337{
3338 AV *state = (AV *)frame->data;
3339
3340 /* if we are about to throw, return early */
3341 /* this does not cancel the aio request, but at least */
3342 /* it quickly returns */
3343 if (CORO_THROW)
1102 return 0; 3344 return 0;
1103}
1104 3345
1105static void 3346 /* one element that is an RV? repeat! */
1106api_schedule (void) 3347 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
1107{
1108 struct transfer_args ta;
1109
1110 prepare_schedule (&ta);
1111 TRANSFER (ta);
1112}
1113
1114static int
1115api_cede (void)
1116{
1117 struct transfer_args ta;
1118
1119 prepare_cede (&ta);
1120
1121 if (ta.prev != ta.next)
1122 {
1123 TRANSFER (ta);
1124 return 1; 3348 return 1;
3349
3350 /* restore status */
3351 {
3352 SV *data_sv = av_pop (state);
3353 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3354
3355 errno = data->errorno;
3356 PL_laststype = data->laststype;
3357 PL_laststatval = data->laststatval;
3358 PL_statcache = data->statcache;
3359
3360 SvREFCNT_dec_NN (data_sv);
1125 } 3361 }
1126 else 3362
3363 /* push result values */
3364 {
3365 dSP;
3366 int i;
3367
3368 EXTEND (SP, AvFILLp (state) + 1);
3369 for (i = 0; i <= AvFILLp (state); ++i)
3370 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3371
3372 PUTBACK;
3373 }
3374
1127 return 0; 3375 return 0;
1128} 3376}
1129 3377
1130static int 3378static void
1131api_cede_notself (void) 3379slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1132{ 3380{
1133 struct transfer_args ta; 3381 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3382 SV *coro_hv = SvRV (coro_current);
3383 struct coro *coro = SvSTATE_hv (coro_hv);
1134 3384
1135 if (prepare_cede_notself (&ta)) 3385 /* put our coroutine id on the state arg */
1136 { 3386 av_push (state, SvREFCNT_inc_NN (coro_hv));
1137 TRANSFER (ta); 3387
1138 return 1; 3388 /* first see whether we have a non-zero priority and set it as AIO prio */
3389 if (coro->prio)
1139 } 3390 {
1140 else 3391 dSP;
1141 return 0;
1142}
1143 3392
3393 static SV *prio_cv;
3394 static SV *prio_sv;
3395
3396 if (ecb_expect_false (!prio_cv))
3397 {
3398 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3399 prio_sv = newSViv (0);
3400 }
3401
3402 PUSHMARK (SP);
3403 sv_setiv (prio_sv, coro->prio);
3404 XPUSHs (prio_sv);
3405
3406 PUTBACK;
3407 call_sv (prio_cv, G_VOID | G_DISCARD);
3408 }
3409
3410 /* now call the original request */
3411 {
3412 dSP;
3413 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3414 int i;
3415
3416 PUSHMARK (SP);
3417
3418 /* first push all args to the stack */
3419 EXTEND (SP, items + 1);
3420
3421 for (i = 0; i < items; ++i)
3422 PUSHs (arg [i]);
3423
3424 /* now push the callback closure */
3425 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3426
3427 /* now call the AIO function - we assume our request is uncancelable */
3428 PUTBACK;
3429 call_sv ((SV *)req, G_VOID | G_DISCARD);
3430 }
3431
3432 /* now that the request is going, we loop till we have a result */
3433 frame->data = (void *)state;
3434 frame->prepare = prepare_schedule;
3435 frame->check = slf_check_aio_req;
3436}
3437
3438static void
3439coro_aio_req_xs (pTHX_ CV *cv)
3440{
3441 dXSARGS;
3442
3443 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3444
3445 XSRETURN_EMPTY;
3446}
3447
3448/*****************************************************************************/
3449
3450#if CORO_CLONE
3451# include "clone.c"
3452#endif
3453
3454/*****************************************************************************/
3455
3456static SV *
3457coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3458{
3459 SV *coro_sv;
3460 struct coro *coro;
3461 MAGIC *mg;
3462 HV *hv;
3463 SV *cb;
3464 int i;
3465
3466 if (argc > 0)
3467 {
3468 cb = s_get_cv_croak (argv [0]);
3469
3470 if (!is_coro)
3471 {
3472 if (CvISXSUB (cb))
3473 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3474
3475 if (!CvROOT (cb))
3476 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3477 }
3478 }
3479
3480 Newz (0, coro, 1, struct coro);
3481 coro->args = newAV ();
3482 coro->flags = CF_NEW;
3483
3484 if (coro_first) coro_first->prev = coro;
3485 coro->next = coro_first;
3486 coro_first = coro;
3487
3488 coro->hv = hv = newHV ();
3489 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3490 mg->mg_flags |= MGf_DUP;
3491 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3492
3493 if (argc > 0)
3494 {
3495 av_extend (coro->args, argc + is_coro - 1);
3496
3497 if (is_coro)
3498 {
3499 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3500 cb = (SV *)cv_coro_run;
3501 }
3502
3503 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3504
3505 for (i = 1; i < argc; i++)
3506 av_push (coro->args, newSVsv (argv [i]));
3507 }
3508
3509 return coro_sv;
3510}
3511
3512#ifndef __cplusplus
3513ecb_cold XS(boot_Coro__State);
3514#endif
3515
3516#if CORO_JIT
3517
3518static void ecb_noinline ecb_cold
3519pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3520{
3521 dSP;
3522 AV *av = newAV ();
3523
3524 av_store (av, 3, newSVuv (d));
3525 av_store (av, 2, newSVuv (c));
3526 av_store (av, 1, newSVuv (b));
3527 av_store (av, 0, newSVuv (a));
3528
3529 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3530
3531 PUTBACK;
3532}
3533
3534static void ecb_noinline ecb_cold
3535jit_init (pTHX)
3536{
3537 dSP;
3538 SV *load, *save;
3539 char *map_base;
3540 char *load_ptr, *save_ptr;
3541 STRLEN load_len, save_len, map_len;
3542 int count;
3543
3544 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3545
3546 PUSHMARK (SP);
3547 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3548 #include "state.h"
3549 count = call_pv ("Coro::State::_jit", G_ARRAY);
3550 SPAGAIN;
3551
3552 save = POPs; save_ptr = SvPVbyte (save, save_len);
3553 load = POPs; load_ptr = SvPVbyte (load, load_len);
3554
3555 map_len = load_len + save_len + 16;
3556
3557 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3558
3559 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3560
3561 load_perl_slots = (load_save_perl_slots_type)map_base;
3562 memcpy (map_base, load_ptr, load_len);
3563
3564 map_base += (load_len + 15) & ~15;
3565
3566 save_perl_slots = (load_save_perl_slots_type)map_base;
3567 memcpy (map_base, save_ptr, save_len);
3568
3569 /* we are good citizens and try to make the page read-only, so the evil evil */
3570 /* hackers might have it a bit more difficult */
3571 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3572
3573 PUTBACK;
3574 eval_pv ("undef &Coro::State::_jit", 1);
3575}
3576
3577#endif
3578
1144MODULE = Coro::State PACKAGE = Coro::State 3579MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1145 3580
1146PROTOTYPES: DISABLE 3581PROTOTYPES: DISABLE
1147 3582
1148BOOT: 3583BOOT:
1149{ 3584{
3585#define VARx(name,expr,type) if (sizeof (type) < sizeof (expr)) croak ("FATAL: Coro thread context slot '" # name "' too small for this version of perl.");
3586#include "state.h"
1150#ifdef USE_ITHREADS 3587#ifdef USE_ITHREADS
1151 MUTEX_INIT (&coro_mutex); 3588# if CORO_PTHREAD
3589 coro_thx = PERL_GET_CONTEXT;
1152#endif 3590# endif
1153 BOOT_PAGESIZE; 3591#endif
3592 /* perl defines these to check for existance first, but why it doesn't */
3593 /* just create them one at init time is not clear to me, except for */
3594 /* programs trying to delete them, but... */
3595 /* anyway, we declare this as invalid and make sure they are initialised here */
3596 DEFSV;
3597 ERRSV;
3598
3599 cctx_current = cctx_new_empty ();
3600
3601 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3602 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3603
3604 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3605 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3606 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3607
3608 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3609 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1154 3610
1155 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3611 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1156 3612
3613 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
3614 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1157 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 3615 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1158 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1159 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1160 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1161 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 3616 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1162 3617
1163 main_mainstack = PL_mainstack; 3618 main_mainstack = PL_mainstack;
3619 main_top_env = PL_top_env;
1164 3620
3621 while (main_top_env->je_prev)
3622 main_top_env = main_top_env->je_prev;
3623
3624 {
3625 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3626
3627 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3628 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3629
3630 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3631 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3632 }
3633
1165 coroapi.ver = CORO_API_VERSION; 3634 coroapi.ver = CORO_API_VERSION;
3635 coroapi.rev = CORO_API_REVISION;
3636
1166 coroapi.transfer = api_transfer; 3637 coroapi.transfer = api_transfer;
1167 3638
3639 coroapi.sv_state = SvSTATE_;
3640 coroapi.execute_slf = api_execute_slf;
3641 coroapi.prepare_nop = prepare_nop;
3642 coroapi.prepare_schedule = prepare_schedule;
3643 coroapi.prepare_cede = prepare_cede;
3644 coroapi.prepare_cede_notself = prepare_cede_notself;
3645
3646 time_init (aTHX);
3647
1168 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3648 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3649#if CORO_JIT
3650 PUTBACK;
3651 jit_init (aTHX);
3652 SPAGAIN;
3653#endif
1169} 3654}
1170 3655
1171SV * 3656SV *
1172new (char *klass, ...) 3657new (SV *klass, ...)
3658 ALIAS:
3659 Coro::new = 1
1173 CODE: 3660 CODE:
1174{ 3661 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1175 struct coro *coro;
1176 HV *hv;
1177 int i;
1178
1179 Newz (0, coro, 1, struct coro);
1180 coro->args = newAV ();
1181 coro->save = CORO_SAVE_ALL;
1182 coro->flags = CF_NEW;
1183
1184 hv = newHV ();
1185 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1186 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1187
1188 for (i = 1; i < items; i++)
1189 av_push (coro->args, newSVsv (ST (i)));
1190}
1191 OUTPUT:
1192 RETVAL
1193
1194int
1195save (SV *coro, int new_save = -1)
1196 CODE:
1197 RETVAL = api_save (coro, new_save);
1198 OUTPUT: 3662 OUTPUT:
1199 RETVAL 3663 RETVAL
1200 3664
1201void 3665void
1202_set_stacklevel (...) 3666transfer (...)
1203 ALIAS: 3667 PROTOTYPE: $$
1204 Coro::State::transfer = 1
1205 Coro::schedule = 2
1206 Coro::cede = 3
1207 Coro::cede_notself = 4
1208 CODE:
1209{
1210 struct transfer_args ta;
1211
1212 switch (ix)
1213 {
1214 case 0:
1215 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1216 ta.next = 0;
1217 break;
1218
1219 case 1:
1220 if (items != 2)
1221 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1222
1223 prepare_transfer (&ta, ST (0), ST (1));
1224 break;
1225
1226 case 2:
1227 prepare_schedule (&ta);
1228 break;
1229
1230 case 3:
1231 prepare_cede (&ta);
1232 break;
1233
1234 case 4:
1235 if (!prepare_cede_notself (&ta))
1236 XSRETURN_EMPTY;
1237
1238 break;
1239 }
1240
1241 BARRIER;
1242 TRANSFER (ta);
1243
1244 if (GIMME_V != G_VOID && ta.next != ta.prev)
1245 XSRETURN_YES;
1246}
1247
1248bool
1249_destroy (SV *coro_sv)
1250 CODE: 3668 CODE:
1251 RETVAL = coro_state_destroy (SvSTATE (coro_sv)); 3669 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3670
3671SV *
3672clone (Coro::State coro)
3673 CODE:
3674{
3675#if CORO_CLONE
3676 struct coro *ncoro = coro_clone (aTHX_ coro);
3677 MAGIC *mg;
3678 /* TODO: too much duplication */
3679 ncoro->hv = newHV ();
3680 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3681 mg->mg_flags |= MGf_DUP;
3682 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3683#else
3684 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3685#endif
3686}
1252 OUTPUT: 3687 OUTPUT:
1253 RETVAL 3688 RETVAL
1254 3689
1255void 3690int
1256_exit (code) 3691cctx_stacksize (int new_stacksize = 0)
1257 int code 3692 PROTOTYPE: ;$
1258 PROTOTYPE: $
1259 CODE: 3693 CODE:
1260 _exit (code); 3694 RETVAL = cctx_stacksize;
3695 if (new_stacksize)
3696 {
3697 cctx_stacksize = new_stacksize;
3698 ++cctx_gen;
3699 }
3700 OUTPUT:
3701 RETVAL
3702
3703int
3704cctx_max_idle (int max_idle = 0)
3705 PROTOTYPE: ;$
3706 CODE:
3707 RETVAL = cctx_max_idle;
3708 if (max_idle > 1)
3709 cctx_max_idle = max_idle;
3710 OUTPUT:
3711 RETVAL
1261 3712
1262int 3713int
1263cctx_count () 3714cctx_count ()
3715 PROTOTYPE:
1264 CODE: 3716 CODE:
1265 RETVAL = cctx_count; 3717 RETVAL = cctx_count;
1266 OUTPUT: 3718 OUTPUT:
1267 RETVAL 3719 RETVAL
1268 3720
1269int 3721int
1270cctx_idle () 3722cctx_idle ()
3723 PROTOTYPE:
1271 CODE: 3724 CODE:
1272 RETVAL = cctx_idle; 3725 RETVAL = cctx_idle;
1273 OUTPUT: 3726 OUTPUT:
1274 RETVAL 3727 RETVAL
1275 3728
3729void
3730list ()
3731 PROTOTYPE:
3732 PPCODE:
3733{
3734 struct coro *coro;
3735 for (coro = coro_first; coro; coro = coro->next)
3736 if (coro->hv)
3737 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3738}
3739
3740void
3741call (Coro::State coro, SV *coderef)
3742 ALIAS:
3743 eval = 1
3744 CODE:
3745{
3746 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3747 {
3748 struct coro *current = SvSTATE_current;
3749 struct CoroSLF slf_save;
3750
3751 if (current != coro)
3752 {
3753 PUTBACK;
3754 save_perl (aTHX_ current);
3755 load_perl (aTHX_ coro);
3756 /* the coro is most likely in an active SLF call.
3757 * while not strictly required (the code we execute is
3758 * not allowed to call any SLF functions), it's cleaner
3759 * to reinitialise the slf_frame and restore it later.
3760 * This might one day allow us to actually do SLF calls
3761 * from code executed here.
3762 */
3763 slf_save = slf_frame;
3764 slf_frame.prepare = 0;
3765 SPAGAIN;
3766 }
3767
3768 PUSHSTACK;
3769
3770 PUSHMARK (SP);
3771 PUTBACK;
3772
3773 if (ix)
3774 eval_sv (coderef, 0);
3775 else
3776 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3777
3778 POPSTACK;
3779 SPAGAIN;
3780
3781 if (current != coro)
3782 {
3783 PUTBACK;
3784 slf_frame = slf_save;
3785 save_perl (aTHX_ coro);
3786 load_perl (aTHX_ current);
3787 SPAGAIN;
3788 }
3789 }
3790}
3791
3792SV *
3793is_ready (Coro::State coro)
3794 PROTOTYPE: $
3795 ALIAS:
3796 is_ready = CF_READY
3797 is_running = CF_RUNNING
3798 is_new = CF_NEW
3799 is_destroyed = CF_ZOMBIE
3800 is_zombie = CF_ZOMBIE
3801 is_suspended = CF_SUSPENDED
3802 CODE:
3803 RETVAL = boolSV (coro->flags & ix);
3804 OUTPUT:
3805 RETVAL
3806
3807void
3808throw (SV *self, SV *exception = &PL_sv_undef)
3809 PROTOTYPE: $;$
3810 CODE:
3811{
3812 struct coro *coro = SvSTATE (self);
3813 struct coro *current = SvSTATE_current;
3814 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3815 SvREFCNT_dec (*exceptionp);
3816 SvGETMAGIC (exception);
3817 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3818
3819 api_ready (aTHX_ self);
3820}
3821
3822void
3823api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3824 PROTOTYPE: $;$
3825 C_ARGS: aTHX_ coro, flags
3826
3827SV *
3828has_cctx (Coro::State coro)
3829 PROTOTYPE: $
3830 CODE:
3831 /* maybe manage the running flag differently */
3832 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3833 OUTPUT:
3834 RETVAL
3835
3836int
3837is_traced (Coro::State coro)
3838 PROTOTYPE: $
3839 CODE:
3840 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3841 OUTPUT:
3842 RETVAL
3843
3844UV
3845rss (Coro::State coro)
3846 PROTOTYPE: $
3847 ALIAS:
3848 usecount = 1
3849 CODE:
3850 switch (ix)
3851 {
3852 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3853 case 1: RETVAL = coro->usecount; break;
3854 }
3855 OUTPUT:
3856 RETVAL
3857
3858void
3859force_cctx ()
3860 PROTOTYPE:
3861 CODE:
3862 cctx_current->idle_sp = 0;
3863
3864void
3865swap_defsv (Coro::State self)
3866 PROTOTYPE: $
3867 ALIAS:
3868 swap_defav = 1
3869 CODE:
3870 if (!self->slot)
3871 croak ("cannot swap state with coroutine that has no saved state,");
3872 else
3873 {
3874 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3875 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3876
3877 SV *tmp = *src; *src = *dst; *dst = tmp;
3878 }
3879
3880void
3881cancel (Coro::State self)
3882 CODE:
3883 coro_state_destroy (aTHX_ self);
3884
3885SV *
3886enable_times (int enabled = enable_times)
3887 CODE:
3888{
3889 RETVAL = boolSV (enable_times);
3890
3891 if (enabled != enable_times)
3892 {
3893 enable_times = enabled;
3894
3895 coro_times_update ();
3896 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3897 }
3898}
3899 OUTPUT:
3900 RETVAL
3901
3902void
3903times (Coro::State self)
3904 PPCODE:
3905{
3906 struct coro *current = SvSTATE (coro_current);
3907
3908 if (ecb_expect_false (current == self))
3909 {
3910 coro_times_update ();
3911 coro_times_add (SvSTATE (coro_current));
3912 }
3913
3914 EXTEND (SP, 2);
3915 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3916 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3917
3918 if (ecb_expect_false (current == self))
3919 coro_times_sub (SvSTATE (coro_current));
3920}
3921
3922void
3923swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3924 CODE:
3925{
3926 struct coro *current = SvSTATE_current;
3927
3928 if (current == coro)
3929 SWAP_SVS (current);
3930
3931 if (!coro->swap_sv)
3932 coro->swap_sv = newAV ();
3933
3934 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3935 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3936
3937 if (current == coro)
3938 SWAP_SVS (current);
3939}
3940
3941
1276MODULE = Coro::State PACKAGE = Coro 3942MODULE = Coro::State PACKAGE = Coro
1277 3943
1278BOOT: 3944BOOT:
1279{ 3945{
1280 int i; 3946 if (SVt_LAST > 32)
3947 croak ("Coro internal error: SVt_LAST > 32, swap_sv might need adjustment");
1281 3948
3949 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3950 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3951 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3952 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3953 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3954 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3955 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3956 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3957
3958 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3959 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3960 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3961 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3962
1282 coro_stash = gv_stashpv ("Coro", TRUE); 3963 coro_stash = gv_stashpv ("Coro", TRUE);
1283 3964
1284 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3965 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1285 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3966 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1286 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3967 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1287 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3968 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1288 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3969 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1289 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3970 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1290
1291 coro_current = get_sv ("Coro::current", FALSE);
1292 SvREADONLY_on (coro_current);
1293
1294 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1295 coro_ready[i] = newAV ();
1296 3971
1297 { 3972 {
1298 SV *sv = perl_get_sv("Coro::API", 1); 3973 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1299 3974
1300 coroapi.schedule = api_schedule; 3975 coroapi.schedule = api_schedule;
1301 coroapi.save = api_save; 3976 coroapi.schedule_to = api_schedule_to;
1302 coroapi.cede = api_cede; 3977 coroapi.cede = api_cede;
1303 coroapi.cede_notself = api_cede_notself; 3978 coroapi.cede_notself = api_cede_notself;
1304 coroapi.ready = api_ready; 3979 coroapi.ready = api_ready;
1305 coroapi.is_ready = api_is_ready; 3980 coroapi.is_ready = api_is_ready;
1306 coroapi.nready = &coro_nready; 3981 coroapi.nready = coro_nready;
1307 coroapi.current = coro_current; 3982 coroapi.current = coro_current;
1308 3983
3984 coroapi.enterleave_hook = api_enterleave_hook;
3985 coroapi.enterleave_unhook = api_enterleave_unhook;
3986 coroapi.enterleave_scope_hook = api_enterleave_scope_hook;
3987
1309 GCoroAPI = &coroapi; 3988 /*GCoroAPI = &coroapi;*/
1310 sv_setiv (sv, (IV)&coroapi); 3989 sv_setiv (sv, (IV)&coroapi);
1311 SvREADONLY_on (sv); 3990 SvREADONLY_on (sv);
1312 } 3991 }
1313} 3992}
3993
3994SV *
3995async (...)
3996 PROTOTYPE: &@
3997 CODE:
3998 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3999 api_ready (aTHX_ RETVAL);
4000 OUTPUT:
4001 RETVAL
4002
4003void
4004_destroy (Coro::State coro)
4005 CODE:
4006 /* used by the manager thread */
4007 coro_state_destroy (aTHX_ coro);
4008
4009void
4010on_destroy (Coro::State coro, SV *cb)
4011 CODE:
4012 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
4013
4014void
4015join (...)
4016 CODE:
4017 CORO_EXECUTE_SLF_XS (slf_init_join);
4018
4019void
4020terminate (...)
4021 CODE:
4022 CORO_EXECUTE_SLF_XS (slf_init_terminate);
4023
4024void
4025cancel (...)
4026 CODE:
4027 CORO_EXECUTE_SLF_XS (slf_init_cancel);
4028
4029int
4030safe_cancel (Coro::State self, ...)
4031 C_ARGS: aTHX_ self, &ST (1), items - 1
4032
4033void
4034schedule (...)
4035 CODE:
4036 CORO_EXECUTE_SLF_XS (slf_init_schedule);
4037
4038void
4039schedule_to (...)
4040 CODE:
4041 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
4042
4043void
4044cede_to (...)
4045 CODE:
4046 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
4047
4048void
4049cede (...)
4050 CODE:
4051 CORO_EXECUTE_SLF_XS (slf_init_cede);
4052
4053void
4054cede_notself (...)
4055 CODE:
4056 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1314 4057
1315void 4058void
1316_set_current (SV *current) 4059_set_current (SV *current)
1317 PROTOTYPE: $ 4060 PROTOTYPE: $
1318 CODE: 4061 CODE:
1319 SvREFCNT_dec (SvRV (coro_current)); 4062 SvREFCNT_dec_NN (SvRV (coro_current));
1320 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 4063 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
4064
4065void
4066_set_readyhook (SV *hook)
4067 PROTOTYPE: $
4068 CODE:
4069 SvREFCNT_dec (coro_readyhook);
4070 SvGETMAGIC (hook);
4071 if (SvOK (hook))
4072 {
4073 coro_readyhook = newSVsv (hook);
4074 CORO_READYHOOK = invoke_sv_ready_hook_helper;
4075 }
4076 else
4077 {
4078 coro_readyhook = 0;
4079 CORO_READYHOOK = 0;
4080 }
1321 4081
1322int 4082int
1323prio (Coro::State coro, int newprio = 0) 4083prio (Coro::State coro, int newprio = 0)
4084 PROTOTYPE: $;$
1324 ALIAS: 4085 ALIAS:
1325 nice = 1 4086 nice = 1
1326 CODE: 4087 CODE:
1327{ 4088{
1328 RETVAL = coro->prio; 4089 RETVAL = coro->prio;
… …
1330 if (items > 1) 4091 if (items > 1)
1331 { 4092 {
1332 if (ix) 4093 if (ix)
1333 newprio = coro->prio - newprio; 4094 newprio = coro->prio - newprio;
1334 4095
1335 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 4096 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1336 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 4097 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1337 4098
1338 coro->prio = newprio; 4099 coro->prio = newprio;
1339 } 4100 }
1340} 4101}
1341 OUTPUT: 4102 OUTPUT:
… …
1343 4104
1344SV * 4105SV *
1345ready (SV *self) 4106ready (SV *self)
1346 PROTOTYPE: $ 4107 PROTOTYPE: $
1347 CODE: 4108 CODE:
1348 RETVAL = boolSV (api_ready (self)); 4109 RETVAL = boolSV (api_ready (aTHX_ self));
1349 OUTPUT:
1350 RETVAL
1351
1352SV *
1353is_ready (SV *self)
1354 PROTOTYPE: $
1355 CODE:
1356 RETVAL = boolSV (api_is_ready (self));
1357 OUTPUT: 4110 OUTPUT:
1358 RETVAL 4111 RETVAL
1359 4112
1360int 4113int
1361nready (...) 4114nready (...)
… …
1363 CODE: 4116 CODE:
1364 RETVAL = coro_nready; 4117 RETVAL = coro_nready;
1365 OUTPUT: 4118 OUTPUT:
1366 RETVAL 4119 RETVAL
1367 4120
1368MODULE = Coro::State PACKAGE = Coro::AIO 4121void
4122suspend (Coro::State self)
4123 PROTOTYPE: $
4124 CODE:
4125 self->flags |= CF_SUSPENDED;
4126
4127void
4128resume (Coro::State self)
4129 PROTOTYPE: $
4130 CODE:
4131 self->flags &= ~CF_SUSPENDED;
4132
4133void
4134_pool_handler (...)
4135 CODE:
4136 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
4137
4138void
4139async_pool (SV *cv, ...)
4140 PROTOTYPE: &@
4141 PPCODE:
4142{
4143 HV *hv = (HV *)av_pop (av_async_pool);
4144 AV *av = newAV ();
4145 SV *cb = ST (0);
4146 int i;
4147
4148 av_extend (av, items - 2);
4149 for (i = 1; i < items; ++i)
4150 av_push (av, SvREFCNT_inc_NN (ST (i)));
4151
4152 if ((SV *)hv == &PL_sv_undef)
4153 {
4154 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
4155 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
4156 SvREFCNT_dec_NN (sv);
4157 }
4158
4159 {
4160 struct coro *coro = SvSTATE_hv (hv);
4161
4162 assert (!coro->invoke_cb);
4163 assert (!coro->invoke_av);
4164 coro->invoke_cb = SvREFCNT_inc (cb);
4165 coro->invoke_av = av;
4166 }
4167
4168 api_ready (aTHX_ (SV *)hv);
4169
4170 if (GIMME_V != G_VOID)
4171 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4172 else
4173 SvREFCNT_dec_NN (hv);
4174}
1369 4175
1370SV * 4176SV *
1371_get_state () 4177rouse_cb ()
4178 PROTOTYPE:
1372 CODE: 4179 CODE:
1373{ 4180 RETVAL = coro_new_rouse_cb (aTHX);
1374 struct io_state *data;
1375
1376 RETVAL = newSV (sizeof (struct io_state));
1377 data = (struct io_state *)SvPVX (RETVAL);
1378 SvCUR_set (RETVAL, sizeof (struct io_state));
1379 SvPOK_only (RETVAL);
1380
1381 data->errorno = errno;
1382 data->laststype = PL_laststype;
1383 data->laststatval = PL_laststatval;
1384 data->statcache = PL_statcache;
1385}
1386 OUTPUT: 4181 OUTPUT:
1387 RETVAL 4182 RETVAL
1388 4183
1389void 4184void
1390_set_state (char *data_) 4185rouse_wait (...)
4186 PROTOTYPE: ;$
4187 PPCODE:
4188 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4189
4190void
4191on_enter (SV *block)
4192 ALIAS:
4193 on_leave = 1
1391 PROTOTYPE: $ 4194 PROTOTYPE: &
1392 CODE: 4195 CODE:
1393{ 4196{
1394 struct io_state *data = (void *)data_; 4197 struct coro *coro = SvSTATE_current;
4198 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1395 4199
1396 errno = data->errorno; 4200 block = s_get_cv_croak (block);
1397 PL_laststype = data->laststype;
1398 PL_laststatval = data->laststatval;
1399 PL_statcache = data->statcache;
1400}
1401 4201
4202 if (!*avp)
4203 *avp = newAV ();
4204
4205 av_push (*avp, SvREFCNT_inc (block));
4206
4207 if (!ix)
4208 on_enterleave_call (aTHX_ block);
4209
4210 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4211 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4212 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4213}
4214
4215
4216MODULE = Coro::State PACKAGE = PerlIO::cede
4217
4218BOOT:
4219 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4220
4221
4222MODULE = Coro::State PACKAGE = Coro::Semaphore
4223
4224SV *
4225new (SV *klass, SV *count = 0)
4226 CODE:
4227{
4228 int semcnt = 1;
4229
4230 if (count)
4231 {
4232 SvGETMAGIC (count);
4233
4234 if (SvOK (count))
4235 semcnt = SvIV (count);
4236 }
4237
4238 RETVAL = sv_bless (
4239 coro_waitarray_new (aTHX_ semcnt),
4240 GvSTASH (CvGV (cv))
4241 );
4242}
4243 OUTPUT:
4244 RETVAL
4245
4246# helper for Coro::Channel and others
4247SV *
4248_alloc (int count)
4249 CODE:
4250 RETVAL = coro_waitarray_new (aTHX_ count);
4251 OUTPUT:
4252 RETVAL
4253
4254SV *
4255count (SV *self)
4256 CODE:
4257 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4258 OUTPUT:
4259 RETVAL
4260
4261void
4262up (SV *self)
4263 CODE:
4264 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), 1);
4265
4266void
4267adjust (SV *self, int adjust)
4268 CODE:
4269 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), adjust);
4270
4271void
4272down (...)
4273 CODE:
4274 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4275
4276void
4277wait (...)
4278 CODE:
4279 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4280
4281void
4282try (SV *self)
4283 PPCODE:
4284{
4285 AV *av = (AV *)SvRV (self);
4286 SV *count_sv = AvARRAY (av)[0];
4287 IV count = SvIVX (count_sv);
4288
4289 if (count > 0)
4290 {
4291 --count;
4292 SvIVX (count_sv) = count;
4293 XSRETURN_YES;
4294 }
4295 else
4296 XSRETURN_NO;
4297}
4298
4299void
4300waiters (SV *self)
4301 PPCODE:
4302{
4303 AV *av = (AV *)SvRV (self);
4304 int wcount = AvFILLp (av) + 1 - 1;
4305
4306 if (GIMME_V == G_SCALAR)
4307 XPUSHs (sv_2mortal (newSViv (wcount)));
4308 else
4309 {
4310 int i;
4311 EXTEND (SP, wcount);
4312 for (i = 1; i <= wcount; ++i)
4313 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4314 }
4315}
4316
4317MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4318
4319void
4320_may_delete (SV *sem, int count, unsigned int extra_refs)
4321 PPCODE:
4322{
4323 AV *av = (AV *)SvRV (sem);
4324
4325 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4326 && AvFILLp (av) == 0 /* no waiters, just count */
4327 && SvIV (AvARRAY (av)[0]) == count)
4328 XSRETURN_YES;
4329
4330 XSRETURN_NO;
4331}
4332
4333MODULE = Coro::State PACKAGE = Coro::Signal
4334
4335SV *
4336new (SV *klass)
4337 CODE:
4338 RETVAL = sv_bless (
4339 coro_waitarray_new (aTHX_ 0),
4340 GvSTASH (CvGV (cv))
4341 );
4342 OUTPUT:
4343 RETVAL
4344
4345void
4346wait (...)
4347 CODE:
4348 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4349
4350void
4351broadcast (SV *self)
4352 CODE:
4353{
4354 AV *av = (AV *)SvRV (self);
4355 coro_signal_wake (aTHX_ av, AvFILLp (av));
4356}
4357
4358void
4359send (SV *self)
4360 CODE:
4361{
4362 AV *av = (AV *)SvRV (self);
4363
4364 if (AvFILLp (av))
4365 coro_signal_wake (aTHX_ av, 1);
4366 else
4367 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4368}
4369
4370IV
4371awaited (SV *self)
4372 CODE:
4373 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4374 OUTPUT:
4375 RETVAL
4376
4377
4378MODULE = Coro::State PACKAGE = Coro::AnyEvent
4379
4380BOOT:
4381 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4382
4383void
4384_schedule (...)
4385 CODE:
4386{
4387 static int incede;
4388
4389 api_cede_notself (aTHX);
4390
4391 ++incede;
4392 while (coro_nready >= incede && api_cede (aTHX))
4393 ;
4394
4395 sv_setsv (sv_activity, &PL_sv_undef);
4396 if (coro_nready >= incede)
4397 {
4398 PUSHMARK (SP);
4399 PUTBACK;
4400 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4401 }
4402
4403 --incede;
4404}
4405
4406
4407MODULE = Coro::State PACKAGE = Coro::AIO
4408
4409void
4410_register (char *target, char *proto, SV *req)
4411 CODE:
4412{
4413 SV *req_cv = s_get_cv_croak (req);
4414 /* newXSproto doesn't return the CV on 5.8 */
4415 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4416 sv_setpv ((SV *)slf_cv, proto);
4417 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4418}
4419
4420MODULE = Coro::State PACKAGE = Coro::Select
4421
4422void
4423patch_pp_sselect ()
4424 CODE:
4425 if (!coro_old_pp_sselect)
4426 {
4427 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4428 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4429 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4430 }
4431
4432void
4433unpatch_pp_sselect ()
4434 CODE:
4435 if (coro_old_pp_sselect)
4436 {
4437 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4438 coro_old_pp_sselect = 0;
4439 }
4440
4441MODULE = Coro::State PACKAGE = Coro::Util
4442
4443void
4444_exit (int code)
4445 CODE:
4446 _exit (code);
4447
4448NV
4449time ()
4450 CODE:
4451 RETVAL = nvtime (aTHX);
4452 OUTPUT:
4453 RETVAL
4454
4455NV
4456gettimeofday ()
4457 PPCODE:
4458{
4459 UV tv [2];
4460 u2time (aTHX_ tv);
4461 EXTEND (SP, 2);
4462 PUSHs (sv_2mortal (newSVuv (tv [0])));
4463 PUSHs (sv_2mortal (newSVuv (tv [1])));
4464}
4465

Diff Legend

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