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Comparing Coro/Coro/State.xs (file contents):
Revision 1.153 by root, Thu Sep 20 12:18:00 2007 UTC vs.
Revision 1.461 by root, Fri Jun 17 16:29:50 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"
2 7
3#define PERL_NO_GET_CONTEXT 8#define PERL_NO_GET_CONTEXT
9#define PERL_EXT
4 10
5#include "EXTERN.h" 11#include "EXTERN.h"
6#include "perl.h" 12#include "perl.h"
7#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
8 15
9#include "patchlevel.h" 16#include "schmorp.h"
10 17
18#define ECB_NO_THREADS 1
19#define ECB_NO_LIBM 1
20#include "ecb.h"
21
22#include <stddef.h>
11#include <stdio.h> 23#include <stdio.h>
12#include <errno.h> 24#include <errno.h>
13#include <assert.h> 25#include <assert.h>
14 26
15#ifdef HAVE_MMAP 27#ifndef SvREFCNT_dec_NN
16# include <unistd.h> 28 #define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv)
17# include <sys/mman.h>
18# ifndef MAP_ANONYMOUS
19# ifdef MAP_ANON
20# define MAP_ANONYMOUS MAP_ANON
21# else
22# undef HAVE_MMAP
23# endif 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;
24# endif 47# endif
25# include <limits.h> 48# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
26# ifndef PAGESIZE 49# define PadlistMAX(pl) AvFILLp (pl)
27# define PAGESIZE pagesize 50# define PadlistNAMES(pl) (*PadlistARRAY (pl))
28# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 51# define PadARRAY AvARRAY
29static long pagesize; 52# define PadMAX AvFILLp
30# else 53# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
31# define BOOT_PAGESIZE (void)0
32# 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 */
33#else 74#else
34# define PAGESIZE 0 75# include <inttypes.h> /* most portable stdint.h */
35# define BOOT_PAGESIZE (void)0
36#endif
37
38#if CORO_USE_VALGRIND
39# include <valgrind/valgrind.h>
40# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
41#else
42# define REGISTER_STACK(cctx,start,end)
43#endif 76#endif
44 77
45/* the maximum number of idle cctx that will be pooled */ 78/* the maximum number of idle cctx that will be pooled */
46#define MAX_IDLE_CCTX 8 79static int cctx_max_idle = 4;
47 80
48#define PERL_VERSION_ATLEAST(a,b,c) \ 81#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
49 (PERL_REVISION > (a) \ 82# define HAS_SCOPESTACK_NAME 1
50 || (PERL_REVISION == (a) \
51 && (PERL_VERSION > (b) \
52 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
53
54#if !PERL_VERSION_ATLEAST (5,6,0)
55# ifndef PL_ppaddr
56# define PL_ppaddr ppaddr
57# endif
58# ifndef call_sv
59# define call_sv perl_call_sv
60# endif
61# ifndef get_sv
62# define get_sv perl_get_sv
63# endif
64# ifndef get_cv
65# define get_cv perl_get_cv
66# endif
67# ifndef IS_PADGV
68# define IS_PADGV(v) 0
69# endif
70# ifndef IS_PADCONST
71# define IS_PADCONST(v) 0
72# endif
73#endif
74
75/* 5.8.7 */
76#ifndef SvRV_set
77# define SvRV_set(s,v) SvRV(s) = (v)
78#endif
79
80#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
81# undef CORO_STACKGUARD
82#endif
83
84#ifndef CORO_STACKGUARD
85# define CORO_STACKGUARD 0
86#endif 83#endif
87 84
88/* prefer perl internal functions over our own? */ 85/* prefer perl internal functions over our own? */
89#ifndef CORO_PREFER_PERL_FUNCTIONS 86#ifndef CORO_PREFER_PERL_FUNCTIONS
90# define CORO_PREFER_PERL_FUNCTIONS 0 87# define CORO_PREFER_PERL_FUNCTIONS 0
91#endif 88#endif
92 89
93/* 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
94 * to the current C stack pointer. Its property is that it changes with each call 91 * portable way as possible. */
95 * and should be unique. */
96#define dSTACKLEVEL int stacklevel
97#define STACKLEVEL ((void *)&stacklevel)
98
99#define IN_DESTRUCT (PL_main_cv == Nullcv)
100
101#if __GNUC__ >= 3 92#if __GNUC__ >= 4
102# define attribute(x) __attribute__(x) 93# define dSTACKLEVEL int stacklevel_dummy
103# define BARRIER __asm__ __volatile__ ("" : : : "memory") 94# define STACKLEVEL __builtin_frame_address (0)
104#else 95#else
105# define attribute(x) 96# define dSTACKLEVEL volatile void *stacklevel
106# define BARRIER 97# define STACKLEVEL ((void *)&stacklevel)
107#endif 98#endif
108 99
109#define NOINLINE attribute ((noinline)) 100#define IN_DESTRUCT PL_dirty
110 101
111#include "CoroAPI.h" 102#include "CoroAPI.h"
103#define GCoroAPI (&coroapi) /* very sneaky */
112 104
113#ifdef USE_ITHREADS 105#ifdef USE_ITHREADS
114static perl_mutex coro_mutex; 106# if CORO_PTHREAD
115# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 107static void *coro_thx;
116# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
117#else
118# define LOCK (void)0
119# define UNLOCK (void)0
120#endif 108# endif
109#endif
121 110
122/* helper storage struct for Coro::AIO */ 111#ifdef __linux
123struct io_state 112# include <time.h> /* for timespec */
124{ 113# include <syscall.h> /* for SYS_* */
125 int errorno; 114# ifdef SYS_clock_gettime
126 I32 laststype; 115# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
127 int laststatval; 116# define CORO_CLOCK_MONOTONIC 1
128 Stat_t statcache; 117# define CORO_CLOCK_THREAD_CPUTIME_ID 3
129}; 118# endif
119#endif
130 120
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;
131static size_t coro_stacksize = CORO_STACKSIZE; 130static size_t cctx_stacksize = CORO_STACKSIZE;
132static struct CoroAPI coroapi; 131static struct CoroAPI coroapi;
133static AV *main_mainstack; /* used to differentiate between $main and others */ 132static AV *main_mainstack; /* used to differentiate between $main and others */
134static JMPENV *main_top_env; 133static JMPENV *main_top_env;
135static HV *coro_state_stash, *coro_stash; 134static HV *coro_state_stash, *coro_stash;
136static 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;
137 162
138static struct coro_cctx *cctx_first; 163static struct coro_cctx *cctx_first;
139static int cctx_count, cctx_idle; 164static int cctx_count, cctx_idle;
140 165
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
141/* this is a structure representing a c-level coroutine */ 176/* this is a structure representing a c-level coroutine */
142typedef struct coro_cctx { 177typedef struct coro_cctx
178{
143 struct coro_cctx *next; 179 struct coro_cctx *next;
144 180
145 /* the stack */ 181 /* the stack */
146 void *sptr; 182 struct coro_stack stack;
147 size_t ssize;
148 183
149 /* cpu state */ 184 /* cpu state */
150 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
151 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
152 JMPENV *top_env; 189 JMPENV *top_env;
153 coro_context cctx; 190 coro_context cctx;
154 191
192 U32 gen;
155#if CORO_USE_VALGRIND 193#if CORO_USE_VALGRIND
156 int valgrind_id; 194 int valgrind_id;
157#endif 195#endif
158 char inuse, mapped; 196 unsigned char flags;
159} coro_cctx; 197} coro_cctx;
160 198
199static coro_cctx *cctx_current; /* the currently running cctx */
200
201/*****************************************************************************/
202
203static MGVTBL coro_state_vtbl;
204
161enum { 205enum
206{
162 CF_RUNNING = 0x0001, /* coroutine is running */ 207 CF_RUNNING = 0x0001, /* coroutine is running */
163 CF_READY = 0x0002, /* coroutine is ready */ 208 CF_READY = 0x0002, /* coroutine is ready */
164 CF_NEW = 0x0004, /* has never been switched to */ 209 CF_NEW = 0x0004, /* has never been switched to */
165 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) */
166}; 213};
167 214
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
168/* this is a structure representing a perl-level coroutine */ 225/* this is a structure representing a perl-level coroutine */
169struct coro { 226struct coro
227{
170 /* the c coroutine allocated to this perl coroutine, if any */ 228 /* the C coroutine allocated to this perl coroutine, if any */
171 coro_cctx *cctx; 229 coro_cctx *cctx;
172 230
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 */
173 /* data associated with this coroutine (initial args) */ 240 AV *args; /* data associated with this coroutine (initial args) */
174 AV *args;
175 int refcnt;
176 int save; /* CORO_SAVE flags */
177 int flags; /* CF_ flags */ 241 int flags; /* CF_ flags */
242 HV *hv; /* the perl hash associated with this coro, if any */
178 243
179 /* optionally saved, might be zero */ 244 /* statistics */
180 AV *defav; /* @_ */ 245 int usecount; /* number of transfers to this coro */
181 SV *defsv; /* $_ */
182 SV *errsv; /* $@ */
183 GV *deffh; /* default filehandle */
184 SV *irssv; /* $/ */
185 SV *irssv_sv; /* real $/ cache */
186
187#define VAR(name,type) type name;
188# include "state.h"
189#undef VAR
190 246
191 /* coro process data */ 247 /* coro process data */
192 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;
193 268
194 /* linked list */ 269 /* linked list */
195 struct coro *next, *prev; 270 struct coro *next, *prev;
196 HV *hv; /* the perl hash associated with this coro, if any */
197}; 271};
198 272
199typedef struct coro *Coro__State; 273typedef struct coro *Coro__State;
200typedef struct coro *Coro__State_or_hashref; 274typedef struct coro *Coro__State_or_hashref;
201 275
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
202/** Coro ********************************************************************/ 281/** Coro ********************************************************************/
203 282
204#define PRIO_MAX 3 283#define CORO_PRIO_MAX 3
205#define PRIO_HIGH 1 284#define CORO_PRIO_HIGH 1
206#define PRIO_NORMAL 0 285#define CORO_PRIO_NORMAL 0
207#define PRIO_LOW -1 286#define CORO_PRIO_LOW -1
208#define PRIO_IDLE -3 287#define CORO_PRIO_IDLE -3
209#define PRIO_MIN -4 288#define CORO_PRIO_MIN -4
210 289
211/* for Coro.pm */ 290/* for Coro.pm */
212static SV *coro_current; 291static SV *coro_current;
213static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 292static SV *coro_readyhook;
214static int coro_nready; 293static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
294static CV *cv_coro_run;
215static struct coro *coro_first; 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
216 392
217/** lowlevel stuff **********************************************************/ 393/** lowlevel stuff **********************************************************/
218 394
219static 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 *
220coro_clone_padlist (pTHX_ CV *cv) 531coro_derive_padlist (pTHX_ CV *cv)
221{ 532{
222 AV *padlist = CvPADLIST (cv); 533 PADLIST *padlist = CvPADLIST (cv);
223 AV *newpadlist, *newpad; 534 PADLIST *newpadlist;
535 PADNAMELIST *padnames;
536 PAD *newpad;
537 PADOFFSET off = PadlistMAX (padlist) + 1;
224 538
225 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. */
226 AvREAL_off (newpadlist); 567 AvREAL_off (newpadlist);
227#if PERL_VERSION_ATLEAST (5,9,0)
228 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
229#else
230 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
231#endif 568#endif
232 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
233 --AvFILLp (padlist);
234 569
235 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 570 /* Already extended to 2 elements by newPADLIST. */
236 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;
237 578
238 return newpadlist; 579 return newpadlist;
239} 580}
240 581
241static void 582ecb_inline void
242free_padlist (pTHX_ AV *padlist) 583free_padlist (pTHX_ PADLIST *padlist)
243{ 584{
244 /* may be during global destruction */ 585 /* may be during global destruction */
245 if (SvREFCNT (padlist)) 586 if (!IN_DESTRUCT)
246 { 587 {
247 I32 i = AvFILLp (padlist); 588 I32 i = PadlistMAX (padlist);
248 while (i >= 0) 589
590 while (i > 0) /* special-case index 0 */
249 { 591 {
250 SV **svp = av_fetch (padlist, i--, FALSE); 592 /* we try to be extra-careful here */
593 PAD *pad = PadlistARRAY (padlist)[i--];
594
251 if (svp) 595 if (pad)
252 { 596 {
253 SV *sv; 597 I32 j = PadMAX (pad);
254 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 598
599 while (j >= 0)
255 SvREFCNT_dec (sv); 600 SvREFCNT_dec (PadARRAY (pad)[j--]);
256 601
602 PadMAX (pad) = -1;
257 SvREFCNT_dec (*svp); 603 SvREFCNT_dec (pad);
258 } 604 }
259 } 605 }
260 606
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);
261 SvREFCNT_dec ((SV*)padlist); 615 SvREFCNT_dec ((SV*)padlist);
616#endif
262 } 617 }
263} 618}
264 619
265static int 620static int
266coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 621coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
267{ 622{
268 AV *padlist; 623 PADLIST *padlist;
269 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;
270 626
271 /* casting is fun. */ 627 /* perl manages to free our internal AV and _then_ call us */
272 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 628 if (IN_DESTRUCT)
629 return 0;
630
631 while (len--)
273 free_padlist (aTHX_ padlist); 632 free_padlist (aTHX_ padlists[len]);
274
275 SvREFCNT_dec (av);
276 633
277 return 0; 634 return 0;
278} 635}
279 636
280#define PERL_MAGIC_coro PERL_MAGIC_ext 637static MGVTBL coro_cv_vtbl = {
281 638 0, 0, 0, 0,
282static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 639 coro_cv_free
283 640};
284#define CORO_MAGIC(cv) \
285 SvMAGIC (cv) \
286 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
287 ? SvMAGIC (cv) \
288 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
289 : 0
290 641
291/* the next two functions merely cache the padlists */ 642/* the next two functions merely cache the padlists */
292static void 643ecb_inline void
293get_padlist (pTHX_ CV *cv) 644get_padlist (pTHX_ CV *cv)
294{ 645{
295 MAGIC *mg = CORO_MAGIC (cv); 646 MAGIC *mg = CORO_MAGIC_cv (cv);
296 AV *av; 647 size_t *lenp;
297 648
298 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 649 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
299 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 650 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
300 else 651 else
301 { 652 {
302#if CORO_PREFER_PERL_FUNCTIONS 653#if CORO_PREFER_PERL_FUNCTIONS
303 /* this is probably cleaner, but also slower? */ 654 /* this is probably cleaner? but also slower! */
655 /* in practise, it seems to be less stable */
304 CV *cp = Perl_cv_clone (cv); 656 CV *cp = Perl_cv_clone (aTHX_ cv);
305 CvPADLIST (cv) = CvPADLIST (cp); 657 CvPADLIST (cv) = CvPADLIST (cp);
306 CvPADLIST (cp) = 0; 658 CvPADLIST (cp) = 0;
307 SvREFCNT_dec (cp); 659 SvREFCNT_dec (cp);
308#else 660#else
309 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 661 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
310#endif 662#endif
311 } 663 }
312} 664}
313 665
314static void 666ecb_inline void
315put_padlist (pTHX_ CV *cv) 667put_padlist (pTHX_ CV *cv)
316{ 668{
317 MAGIC *mg = CORO_MAGIC (cv); 669 MAGIC *mg = CORO_MAGIC_cv (cv);
318 AV *av;
319 670
320 if (!mg) 671 if (ecb_expect_false (!mg))
321 {
322 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
323 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
324 mg->mg_virtual = &vtbl_coro;
325 mg->mg_obj = (SV *)newAV ();
326 } 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);
327 681
328 av = (AV *)mg->mg_obj; 682 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
329
330 if (AvFILLp (av) >= AvMAX (av))
331 av_extend (av, AvMAX (av) + 1);
332
333 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
334} 683}
335 684
336/** load & save, init *******************************************************/ 685/** load & save, init *******************************************************/
337 686
338#define SB do { 687ecb_inline void
339#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;
340 692
341#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);
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 */
730static void
731swap_svs_enter (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
739static void
740swap_svs_leave (pTHX_ Coro__State c)
741{
742 int i;
743
744 for (i = AvFILLp (c->swap_sv) - 1; i >= 0; i -= 2)
745 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
746}
747
748#define SWAP_SVS_ENTER(coro) \
749 if (ecb_expect_false ((coro)->swap_sv)) \
750 swap_svs_enter (aTHX_ (coro))
751
752#define SWAP_SVS_LEAVE(coro) \
753 if (ecb_expect_false ((coro)->swap_sv)) \
754 swap_svs_leave (aTHX_ (coro))
755
756static void
757on_enterleave_call (pTHX_ SV *cb);
342 758
343static void 759static void
344load_perl (pTHX_ Coro__State c) 760load_perl (pTHX_ Coro__State c)
345{ 761{
346#define VAR(name,type) PL_ ## name = c->name; 762 perl_slots *slot = c->slot;
763 c->slot = 0;
764
765 PL_mainstack = c->mainstack;
766
767#if CORO_JIT
768 load_perl_slots (slot);
769#else
770 #define VARx(name,expr,type) expr = slot->name;
347# include "state.h" 771 #include "state.h"
348#undef VAR 772#endif
349
350 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
351 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
352 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
353 if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
354
355 if (c->irssv)
356 {
357 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
358 {
359 SvREFCNT_dec (c->irssv);
360 c->irssv = 0;
361 }
362 else
363 {
364 REPLACE_SV (PL_rs, c->irssv);
365 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
366 sv_setsv (c->irssv_sv, PL_rs);
367 }
368 }
369 773
370 { 774 {
371 dSP; 775 dSP;
776
372 CV *cv; 777 CV *cv;
373 778
374 /* now do the ugly restore mess */ 779 /* now do the ugly restore mess */
375 while ((cv = (CV *)POPs)) 780 while (ecb_expect_true (cv = (CV *)POPs))
376 { 781 {
377 put_padlist (aTHX_ cv); /* mark this padlist as available */ 782 put_padlist (aTHX_ cv); /* mark this padlist as available */
378 CvDEPTH (cv) = PTR2IV (POPs); 783 CvDEPTH (cv) = PTR2IV (POPs);
379 CvPADLIST (cv) = (AV *)POPs; 784 CvPADLIST (cv) = (PADLIST *)POPs;
380 } 785 }
381 786
382 PUTBACK; 787 PUTBACK;
383 } 788 }
789
790 slf_frame = c->slf_frame;
791 CORO_THROW = c->except;
792
793 if (ecb_expect_false (enable_times))
794 {
795 if (ecb_expect_false (!times_valid))
796 coro_times_update ();
797
798 coro_times_sub (c);
799 }
800
801 if (ecb_expect_false (c->on_enter))
802 {
803 int i;
804
805 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
806 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
807 }
808
809 if (ecb_expect_false (c->on_enter_xs))
810 {
811 int i;
812
813 for (i = 0; i <= AvFILLp (c->on_enter_xs); i += 2)
814 ((coro_enterleave_hook)AvARRAY (c->on_enter_xs)[i]) (aTHX_ AvARRAY (c->on_enter_xs)[i + 1]);
815 }
816
817 SWAP_SVS_ENTER (c);
384} 818}
385 819
386static void 820static void
387save_perl (pTHX_ Coro__State c) 821save_perl (pTHX_ Coro__State c)
388{ 822{
823 SWAP_SVS_LEAVE (c);
824
825 if (ecb_expect_false (c->on_leave_xs))
826 {
827 int i;
828
829 for (i = AvFILLp (c->on_leave_xs) - 1; i >= 0; i -= 2)
830 ((coro_enterleave_hook)AvARRAY (c->on_leave_xs)[i]) (aTHX_ AvARRAY (c->on_leave_xs)[i + 1]);
831 }
832
833 if (ecb_expect_false (c->on_leave))
834 {
835 int i;
836
837 for (i = AvFILLp (c->on_leave); i >= 0; --i)
838 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
839 }
840
841 times_valid = 0;
842
843 if (ecb_expect_false (enable_times))
844 {
845 coro_times_update (); times_valid = 1;
846 coro_times_add (c);
847 }
848
849 c->except = CORO_THROW;
850 c->slf_frame = slf_frame;
851
389 { 852 {
390 dSP; 853 dSP;
391 I32 cxix = cxstack_ix; 854 I32 cxix = cxstack_ix;
392 PERL_CONTEXT *ccstk = cxstack; 855 PERL_CONTEXT *ccstk = cxstack;
393 PERL_SI *top_si = PL_curstackinfo; 856 PERL_SI *top_si = PL_curstackinfo;
… …
395 /* 858 /*
396 * the worst thing you can imagine happens first - we have to save 859 * the worst thing you can imagine happens first - we have to save
397 * (and reinitialize) all cv's in the whole callchain :( 860 * (and reinitialize) all cv's in the whole callchain :(
398 */ 861 */
399 862
400 EXTEND (SP, 3 + 1);
401 PUSHs (Nullsv); 863 XPUSHs (Nullsv);
402 /* this loop was inspired by pp_caller */ 864 /* this loop was inspired by pp_caller */
403 for (;;) 865 for (;;)
404 { 866 {
405 while (cxix >= 0) 867 while (ecb_expect_true (cxix >= 0))
406 { 868 {
407 PERL_CONTEXT *cx = &ccstk[cxix--]; 869 PERL_CONTEXT *cx = &ccstk[cxix--];
408 870
409 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT) 871 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
410 { 872 {
411 CV *cv = cx->blk_sub.cv; 873 CV *cv = cx->blk_sub.cv;
412 874
413 if (CvDEPTH (cv)) 875 if (ecb_expect_true (CvDEPTH (cv)))
414 { 876 {
415 EXTEND (SP, 3); 877 EXTEND (SP, 3);
416 PUSHs ((SV *)CvPADLIST (cv)); 878 PUSHs ((SV *)CvPADLIST (cv));
417 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 879 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
418 PUSHs ((SV *)cv); 880 PUSHs ((SV *)cv);
419 881
420 CvDEPTH (cv) = 0; 882 CvDEPTH (cv) = 0;
421 get_padlist (aTHX_ cv); 883 get_padlist (aTHX_ cv);
422 } 884 }
423 } 885 }
424 } 886 }
425 887
426 if (top_si->si_type == PERLSI_MAIN) 888 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
427 break; 889 break;
428 890
429 top_si = top_si->si_prev; 891 top_si = top_si->si_prev;
430 ccstk = top_si->si_cxstack; 892 ccstk = top_si->si_cxstack;
431 cxix = top_si->si_cxix; 893 cxix = top_si->si_cxix;
432 } 894 }
433 895
434 PUTBACK; 896 PUTBACK;
435 } 897 }
436 898
437 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 899 /* allocate some space on the context stack for our purposes */
438 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 900 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
439 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 901 {
440 c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0; 902 unsigned int i;
441 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
442 903
443#define VAR(name,type)c->name = PL_ ## name; 904 for (i = 0; i < SLOT_COUNT; ++i)
905 CXINC;
906
907 cxstack_ix -= SLOT_COUNT; /* undo allocation */
908 }
909
910 c->mainstack = PL_mainstack;
911
912 {
913 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
914
915#if CORO_JIT
916 save_perl_slots (slot);
917#else
918 #define VARx(name,expr,type) slot->name = expr;
444# include "state.h" 919 #include "state.h"
445#undef VAR 920#endif
921 }
446} 922}
447 923
448/* 924/*
449 * allocate various perl stacks. This is an exact copy 925 * allocate various perl stacks. This is almost an exact copy
450 * of perl.c:init_stacks, except that it uses less memory 926 * of perl.c:init_stacks, except that it uses less memory
451 * on the (sometimes correct) assumption that coroutines do 927 * on the (sometimes correct) assumption that coroutines do
452 * not usually need a lot of stackspace. 928 * not usually need a lot of stackspace.
453 */ 929 */
454#if CORO_PREFER_PERL_FUNCTIONS 930#if CORO_PREFER_PERL_FUNCTIONS
455# define coro_init_stacks init_stacks 931# define coro_init_stacks(thx) init_stacks ()
456#else 932#else
457static void 933static void
458coro_init_stacks (pTHX) 934coro_init_stacks (pTHX)
459{ 935{
460 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 936 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
461 PL_curstackinfo->si_type = PERLSI_MAIN; 937 PL_curstackinfo->si_type = PERLSI_MAIN;
462 PL_curstack = PL_curstackinfo->si_stack; 938 PL_curstack = PL_curstackinfo->si_stack;
463 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 939 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
464 940
465 PL_stack_base = AvARRAY(PL_curstack); 941 PL_stack_base = AvARRAY(PL_curstack);
466 PL_stack_sp = PL_stack_base; 942 PL_stack_sp = PL_stack_base;
467 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 943 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
468 944
469 New(50,PL_tmps_stack,128,SV*); 945 New(50,PL_tmps_stack,32,SV*);
470 PL_tmps_floor = -1; 946 PL_tmps_floor = -1;
471 PL_tmps_ix = -1; 947 PL_tmps_ix = -1;
472 PL_tmps_max = 128; 948 PL_tmps_max = 32;
473 949
474 New(54,PL_markstack,32,I32); 950 New(54,PL_markstack,16,I32);
475 PL_markstack_ptr = PL_markstack; 951 PL_markstack_ptr = PL_markstack;
476 PL_markstack_max = PL_markstack + 32; 952 PL_markstack_max = PL_markstack + 16;
477 953
478#ifdef SET_MARK_OFFSET 954#ifdef SET_MARK_OFFSET
479 SET_MARK_OFFSET; 955 SET_MARK_OFFSET;
480#endif 956#endif
481 957
482 New(54,PL_scopestack,32,I32); 958 New(54,PL_scopestack,8,I32);
483 PL_scopestack_ix = 0; 959 PL_scopestack_ix = 0;
484 PL_scopestack_max = 32; 960 PL_scopestack_max = 8;
961#if HAS_SCOPESTACK_NAME
962 New(54,PL_scopestack_name,8,const char*);
963#endif
485 964
486 New(54,PL_savestack,64,ANY); 965 New(54,PL_savestack,24,ANY);
487 PL_savestack_ix = 0; 966 PL_savestack_ix = 0;
488 PL_savestack_max = 64; 967 PL_savestack_max = 24;
489 968
490#if !PERL_VERSION_ATLEAST (5,9,0) 969#if !PERL_VERSION_ATLEAST (5,10,0)
491 New(54,PL_retstack,16,OP*); 970 New(54,PL_retstack,4,OP*);
492 PL_retstack_ix = 0; 971 PL_retstack_ix = 0;
493 PL_retstack_max = 16; 972 PL_retstack_max = 4;
494#endif 973#endif
495} 974}
496#endif 975#endif
497 976
498/* 977/*
499 * destroy the stacks, the callchain etc... 978 * destroy the stacks, the callchain etc...
500 */ 979 */
501static void 980static void
502coro_destroy_stacks (pTHX) 981coro_destruct_stacks (pTHX)
503{ 982{
504 if (!IN_DESTRUCT)
505 {
506 /* restore all saved variables and stuff */
507 LEAVE_SCOPE (0);
508 assert (PL_tmps_floor == -1);
509
510 /* free all temporaries */
511 FREETMPS;
512 assert (PL_tmps_ix == -1);
513
514 /* unwind all extra stacks */
515 POPSTACK_TO (PL_mainstack);
516
517 /* unwind main stack */
518 dounwind (-1);
519 }
520
521 while (PL_curstackinfo->si_next) 983 while (PL_curstackinfo->si_next)
522 PL_curstackinfo = PL_curstackinfo->si_next; 984 PL_curstackinfo = PL_curstackinfo->si_next;
523 985
524 while (PL_curstackinfo) 986 while (PL_curstackinfo)
525 { 987 {
… …
534 } 996 }
535 997
536 Safefree (PL_tmps_stack); 998 Safefree (PL_tmps_stack);
537 Safefree (PL_markstack); 999 Safefree (PL_markstack);
538 Safefree (PL_scopestack); 1000 Safefree (PL_scopestack);
1001#if HAS_SCOPESTACK_NAME
1002 Safefree (PL_scopestack_name);
1003#endif
539 Safefree (PL_savestack); 1004 Safefree (PL_savestack);
540#if !PERL_VERSION_ATLEAST (5,9,0) 1005#if !PERL_VERSION_ATLEAST (5,10,0)
541 Safefree (PL_retstack); 1006 Safefree (PL_retstack);
542#endif 1007#endif
543} 1008}
544 1009
1010#define CORO_RSS \
1011 rss += sizeof (SYM (curstackinfo)); \
1012 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
1013 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
1014 rss += SYM (tmps_max) * sizeof (SV *); \
1015 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
1016 rss += SYM (scopestack_max) * sizeof (I32); \
1017 rss += SYM (savestack_max) * sizeof (ANY);
1018
545static size_t 1019static size_t
546coro_rss (struct coro *coro) 1020coro_rss (pTHX_ struct coro *coro)
547{ 1021{
548 size_t rss = sizeof (coro); 1022 size_t rss = sizeof (*coro);
549 1023
550 if (coro->mainstack) 1024 if (coro->mainstack)
551 { 1025 {
552 if (coro->flags & CF_RUNNING) 1026 if (coro->flags & CF_RUNNING)
553 { 1027 {
554 #define VAR(name,type)coro->name = PL_ ## name; 1028 #define SYM(sym) PL_ ## sym
555 # include "state.h" 1029 CORO_RSS;
556 #undef VAR 1030 #undef SYM
557 } 1031 }
558 1032 else
559 rss += sizeof (coro->curstackinfo); 1033 {
560 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *); 1034 #define SYM(sym) coro->slot->sym
561 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 1035 CORO_RSS;
562 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *); 1036 #undef SYM
563 rss += coro->tmps_max * sizeof (SV *); 1037 }
564 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
565 rss += coro->scopestack_max * sizeof (I32);
566 rss += coro->savestack_max * sizeof (ANY);
567
568#if !PERL_VERSION_ATLEAST (5,9,0)
569 rss += coro->retstack_max * sizeof (OP *);
570#endif
571 } 1038 }
572 1039
573 return rss; 1040 return rss;
574} 1041}
575 1042
576/** coroutine stack handling ************************************************/ 1043/** coroutine stack handling ************************************************/
577 1044
1045static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
1046static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
1047static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
1048
1049/* apparently < 5.8.8 */
1050#ifndef MgPV_nolen_const
1051#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
1052 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
1053 (const char*)(mg)->mg_ptr)
1054#endif
1055
1056/*
1057 * This overrides the default magic get method of %SIG elements.
1058 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
1059 * and instead of trying to save and restore the hash elements (extremely slow),
1060 * we just provide our own readback here.
1061 */
1062static int ecb_cold
1063coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
1064{
1065 const char *s = MgPV_nolen_const (mg);
1066
1067 if (*s == '_')
1068 {
1069 SV **svp = 0;
1070
1071 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1072 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1073
1074 if (svp)
1075 {
1076 SV *ssv;
1077
1078 if (!*svp)
1079 ssv = &PL_sv_undef;
1080 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1081 ssv = sv_2mortal (newRV_inc (*svp));
1082 else
1083 ssv = *svp;
1084
1085 sv_setsv (sv, ssv);
1086 return 0;
1087 }
1088 }
1089
1090 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1091}
1092
1093static int ecb_cold
1094coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1095{
1096 const char *s = MgPV_nolen_const (mg);
1097
1098 if (*s == '_')
1099 {
1100 SV **svp = 0;
1101
1102 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1103 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1104
1105 if (svp)
1106 {
1107 SV *old = *svp;
1108 *svp = 0;
1109 SvREFCNT_dec (old);
1110 return 0;
1111 }
1112 }
1113
1114 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1115}
1116
1117static int ecb_cold
1118coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1119{
1120 const char *s = MgPV_nolen_const (mg);
1121
1122 if (*s == '_')
1123 {
1124 SV **svp = 0;
1125
1126 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1127 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1128
1129 if (svp)
1130 {
1131 SV *old = *svp;
1132 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1133 SvREFCNT_dec (old);
1134 return 0;
1135 }
1136 }
1137
1138 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1139}
1140
1141static void
1142prepare_nop (pTHX_ struct coro_transfer_args *ta)
1143{
1144 /* kind of mega-hacky, but works */
1145 ta->next = ta->prev = (struct coro *)ta;
1146}
1147
578static void 1148static int
1149slf_check_nop (pTHX_ struct CoroSLF *frame)
1150{
1151 return 0;
1152}
1153
1154static int
1155slf_check_repeat (pTHX_ struct CoroSLF *frame)
1156{
1157 return 1;
1158}
1159
1160static UNOP init_perl_op;
1161
1162ecb_noinline static void /* noinline to keep it out of the transfer fast path */
579setup_coro (pTHX_ struct coro *coro) 1163init_perl (pTHX_ struct coro *coro)
580{ 1164{
581 /* 1165 /*
582 * emulate part of the perl startup here. 1166 * emulate part of the perl startup here.
583 */ 1167 */
584 coro_init_stacks (aTHX); 1168 coro_init_stacks (aTHX);
585 1169
1170 PL_runops = RUNOPS_DEFAULT;
586 PL_curcop = &PL_compiling; 1171 PL_curcop = &PL_compiling;
587 PL_in_eval = EVAL_NULL; 1172 PL_in_eval = EVAL_NULL;
588 PL_comppad = 0; 1173 PL_comppad = 0;
1174 PL_comppad_name = 0;
1175 PL_comppad_name_fill = 0;
1176 PL_comppad_name_floor = 0;
589 PL_curpm = 0; 1177 PL_curpm = 0;
1178 PL_curpad = 0;
590 PL_localizing = 0; 1179 PL_localizing = 0;
591 PL_dirty = 0;
592 PL_restartop = 0; 1180 PL_restartop = 0;
1181#if PERL_VERSION_ATLEAST (5,10,0)
1182 PL_parser = 0;
1183#endif
1184 PL_hints = 0;
1185
1186 /* recreate the die/warn hooks */
1187 PL_diehook = SvREFCNT_inc (rv_diehook);
1188 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1189
1190 GvSV (PL_defgv) = newSV (0);
1191 GvAV (PL_defgv) = coro->args; coro->args = 0;
1192 GvSV (PL_errgv) = newSV (0);
1193 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1194 GvHV (PL_hintgv) = newHV ();
1195#if PERL_VERSION_ATLEAST (5,10,0)
1196 hv_magic (GvHV (PL_hintgv), 0, PERL_MAGIC_hints);
1197#endif
1198 PL_rs = newSVsv (GvSV (irsgv));
1199 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
593 1200
594 { 1201 {
595 dSP; 1202 dSP;
596 LOGOP myop; 1203 UNOP myop;
597 1204
598 SvREFCNT_dec (GvAV (PL_defgv));
599 GvAV (PL_defgv) = coro->args; coro->args = 0;
600
601 Zero (&myop, 1, LOGOP); 1205 Zero (&myop, 1, UNOP);
602 myop.op_next = Nullop; 1206 myop.op_next = Nullop;
1207 myop.op_type = OP_ENTERSUB;
603 myop.op_flags = OPf_WANT_VOID; 1208 myop.op_flags = OPf_WANT_VOID;
604 1209
605 PUSHMARK (SP); 1210 PUSHMARK (SP);
606 XPUSHs (av_shift (GvAV (PL_defgv))); 1211 PUSHs ((SV *)coro->startcv);
607 PUTBACK; 1212 PUTBACK;
608 PL_op = (OP *)&myop; 1213 PL_op = (OP *)&myop;
609 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1214 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
610 SPAGAIN;
611 } 1215 }
612 1216
613 ENTER; /* necessary e.g. for dounwind */ 1217 /* this newly created coroutine might be run on an existing cctx which most
614} 1218 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1219 */
1220 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1221 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1222 slf_frame.destroy = 0;
615 1223
1224 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1225 init_perl_op.op_next = PL_op;
1226 init_perl_op.op_type = OP_ENTERSUB;
1227 init_perl_op.op_ppaddr = pp_slf;
1228 /* no flags etc. required, as an init function won't be called */
1229
1230 PL_op = (OP *)&init_perl_op;
1231
1232 /* copy throw, in case it was set before init_perl */
1233 CORO_THROW = coro->except;
1234
1235 SWAP_SVS_ENTER (coro);
1236
1237 if (ecb_expect_false (enable_times))
1238 {
1239 coro_times_update ();
1240 coro_times_sub (coro);
1241 }
1242}
1243
616static void 1244static void
1245coro_unwind_stacks (pTHX)
1246{
1247 if (!IN_DESTRUCT)
1248 {
1249 /* restore all saved variables and stuff */
1250 LEAVE_SCOPE (0);
1251 assert (PL_tmps_floor == -1);
1252
1253 /* free all temporaries */
1254 FREETMPS;
1255 assert (PL_tmps_ix == -1);
1256
1257 /* unwind all extra stacks */
1258 POPSTACK_TO (PL_mainstack);
1259
1260 /* unwind main stack */
1261 dounwind (-1);
1262 }
1263}
1264
1265static void
1266destroy_perl (pTHX_ struct coro *coro)
1267{
1268 SV *svf [9];
1269
1270 {
1271 SV *old_current = SvRV (coro_current);
1272 struct coro *current = SvSTATE (old_current);
1273
1274 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1275
1276 save_perl (aTHX_ current);
1277
1278 /* this will cause transfer_check to croak on block*/
1279 SvRV_set (coro_current, (SV *)coro->hv);
1280
1281 load_perl (aTHX_ coro);
1282
1283 /* restore swapped sv's */
1284 SWAP_SVS_LEAVE (coro);
1285
1286 coro_unwind_stacks (aTHX);
1287
1288 coro_destruct_stacks (aTHX);
1289
1290 /* now save some sv's to be free'd later */
1291 svf [0] = GvSV (PL_defgv);
1292 svf [1] = (SV *)GvAV (PL_defgv);
1293 svf [2] = GvSV (PL_errgv);
1294 svf [3] = (SV *)PL_defoutgv;
1295 svf [4] = PL_rs;
1296 svf [5] = GvSV (irsgv);
1297 svf [6] = (SV *)GvHV (PL_hintgv);
1298 svf [7] = PL_diehook;
1299 svf [8] = PL_warnhook;
1300 assert (9 == sizeof (svf) / sizeof (*svf));
1301
1302 SvRV_set (coro_current, old_current);
1303
1304 load_perl (aTHX_ current);
1305 }
1306
1307 {
1308 unsigned int i;
1309
1310 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1311 SvREFCNT_dec (svf [i]);
1312
1313 SvREFCNT_dec (coro->saved_deffh);
1314 SvREFCNT_dec (coro->rouse_cb);
1315 SvREFCNT_dec (coro->invoke_cb);
1316 SvREFCNT_dec (coro->invoke_av);
1317 SvREFCNT_dec (coro->on_enter_xs);
1318 SvREFCNT_dec (coro->on_leave_xs);
1319 }
1320}
1321
1322ecb_inline void
617free_coro_mortal (pTHX) 1323free_coro_mortal (pTHX)
618{ 1324{
619 if (coro_mortal) 1325 if (ecb_expect_true (coro_mortal))
620 { 1326 {
621 SvREFCNT_dec (coro_mortal); 1327 SvREFCNT_dec ((SV *)coro_mortal);
622 coro_mortal = 0; 1328 coro_mortal = 0;
623 } 1329 }
624} 1330}
625 1331
626/* inject a fake call to Coro::State::_cctx_init into the execution */ 1332static int
627/* _cctx_init should be careful, as it could be called at almost any time */ 1333runops_trace (pTHX)
628/* during execution of a perl program */
629static void NOINLINE
630prepare_cctx (pTHX_ coro_cctx *cctx)
631{ 1334{
632 dSP; 1335 COP *oldcop = 0;
633 LOGOP myop; 1336 int oldcxix = -2;
634 1337
635 Zero (&myop, 1, LOGOP); 1338 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
636 myop.op_next = PL_op; 1339 {
637 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1340 PERL_ASYNC_CHECK ();
638 1341
639 PUSHMARK (SP); 1342 if (cctx_current->flags & CC_TRACE_ALL)
640 EXTEND (SP, 2); 1343 {
641 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1344 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
642 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1345 {
643 PUTBACK; 1346 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
644 PL_op = (OP *)&myop; 1347 SV **bot, **top;
645 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1348 AV *av = newAV (); /* return values */
646 SPAGAIN; 1349 SV **cb;
1350 dSP;
1351
1352 GV *gv = CvGV (cx->blk_sub.cv);
1353 SV *fullname = sv_2mortal (newSV (0));
1354 if (isGV (gv))
1355 gv_efullname3 (fullname, gv, 0);
1356
1357 bot = PL_stack_base + cx->blk_oldsp + 1;
1358 top = cx->blk_gimme == G_ARRAY ? SP + 1
1359 : cx->blk_gimme == G_SCALAR ? bot + 1
1360 : bot;
1361
1362 av_extend (av, top - bot);
1363 while (bot < top)
1364 av_push (av, SvREFCNT_inc_NN (*bot++));
1365
1366 PL_runops = RUNOPS_DEFAULT;
1367 ENTER;
1368 SAVETMPS;
1369 EXTEND (SP, 3);
1370 PUSHMARK (SP);
1371 PUSHs (&PL_sv_no);
1372 PUSHs (fullname);
1373 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1374 PUTBACK;
1375 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1376 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1377 SPAGAIN;
1378 FREETMPS;
1379 LEAVE;
1380 PL_runops = runops_trace;
1381 }
1382
1383 if (oldcop != PL_curcop)
1384 {
1385 oldcop = PL_curcop;
1386
1387 if (PL_curcop != &PL_compiling)
1388 {
1389 SV **cb;
1390
1391 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB && cxstack_ix >= 0)
1392 {
1393 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1394
1395 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1396 {
1397 dSP;
1398 GV *gv = CvGV (cx->blk_sub.cv);
1399 SV *fullname = sv_2mortal (newSV (0));
1400
1401 if (isGV (gv))
1402 gv_efullname3 (fullname, gv, 0);
1403
1404 PL_runops = RUNOPS_DEFAULT;
1405 ENTER;
1406 SAVETMPS;
1407 EXTEND (SP, 3);
1408 PUSHMARK (SP);
1409 PUSHs (&PL_sv_yes);
1410 PUSHs (fullname);
1411 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1412 PUTBACK;
1413 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1414 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1415 SPAGAIN;
1416 FREETMPS;
1417 LEAVE;
1418 PL_runops = runops_trace;
1419 }
1420
1421 oldcxix = cxstack_ix;
1422 }
1423
1424 if (cctx_current->flags & CC_TRACE_LINE)
1425 {
1426 dSP;
1427
1428 PL_runops = RUNOPS_DEFAULT;
1429 ENTER;
1430 SAVETMPS;
1431 EXTEND (SP, 3);
1432 PL_runops = RUNOPS_DEFAULT;
1433 PUSHMARK (SP);
1434 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1435 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1436 PUTBACK;
1437 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1438 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1439 SPAGAIN;
1440 FREETMPS;
1441 LEAVE;
1442 PL_runops = runops_trace;
1443 }
1444 }
1445 }
1446 }
1447 }
1448
1449 TAINT_NOT;
1450 return 0;
1451}
1452
1453static struct CoroSLF cctx_ssl_frame;
1454
1455static void
1456slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1457{
1458 ta->prev = 0;
1459}
1460
1461static int
1462slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1463{
1464 *frame = cctx_ssl_frame;
1465
1466 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1467}
1468
1469/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1470static void ecb_noinline
1471cctx_prepare (pTHX)
1472{
1473 PL_top_env = &PL_start_env;
1474
1475 if (cctx_current->flags & CC_TRACE)
1476 PL_runops = runops_trace;
1477
1478 /* we already must be executing an SLF op, there is no other valid way
1479 * that can lead to creation of a new cctx */
1480 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1481 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1482
1483 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1484 cctx_ssl_frame = slf_frame;
1485
1486 slf_frame.prepare = slf_prepare_set_stacklevel;
1487 slf_frame.check = slf_check_set_stacklevel;
1488}
1489
1490/* the tail of transfer: execute stuff we can only do after a transfer */
1491ecb_inline void
1492transfer_tail (pTHX)
1493{
1494 free_coro_mortal (aTHX);
1495}
1496
1497/* try to exit the same way perl's main function would do */
1498/* we do not bother resetting the environment or other things *7
1499/* that are not, uhm, essential */
1500/* this obviously also doesn't work when perl is embedded */
1501static void ecb_noinline ecb_cold
1502perlish_exit (pTHX)
1503{
1504 int exitstatus = perl_destruct (PL_curinterp);
1505 perl_free (PL_curinterp);
1506 exit (exitstatus);
647} 1507}
648 1508
649/* 1509/*
650 * this is a _very_ stripped down perl interpreter ;) 1510 * this is a _very_ stripped down perl interpreter ;)
651 */ 1511 */
652static void 1512static void
653coro_run (void *arg) 1513cctx_run (void *arg)
654{ 1514{
1515#ifdef USE_ITHREADS
1516# if CORO_PTHREAD
1517 PERL_SET_CONTEXT (coro_thx);
1518# endif
1519#endif
1520 {
655 dTHX; 1521 dTHX;
656 1522
657 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1523 /* normally we would need to skip the entersub here */
658 UNLOCK; 1524 /* not doing so will re-execute it, which is exactly what we want */
1525 /* PL_nop = PL_nop->op_next */
659 1526
660 PL_top_env = &PL_start_env;
661
662 /* inject a fake subroutine call to cctx_init */ 1527 /* inject a fake subroutine call to cctx_init */
663 prepare_cctx (aTHX_ (coro_cctx *)arg); 1528 cctx_prepare (aTHX);
664 1529
1530 /* cctx_run is the alternative tail of transfer() */
1531 transfer_tail (aTHX);
1532
665 /* somebody or something will hit me for both perl_run and PL_restartop */ 1533 /* somebody or something will hit me for both perl_run and PL_restartop */
666 PL_restartop = PL_op; 1534 PL_restartop = PL_op;
667 perl_run (PL_curinterp); 1535 perl_run (PL_curinterp);
668
669 /* 1536 /*
1537 * Unfortunately, there is no way to get at the return values of the
1538 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1539 * runtime errors here, as this is just a random interpreter, not a thread.
1540 */
1541
1542 /*
670 * If perl-run returns we assume exit() was being called or the coro 1543 * If perl-run returns we assume exit() was being called or the coro
671 * fell off the end, which seems to be the only valid (non-bug) 1544 * fell off the end, which seems to be the only valid (non-bug)
672 * reason for perl_run to return. We try to exit by jumping to the 1545 * reason for perl_run to return. We try to mimic whatever perl is normally
673 * bootstrap-time "top" top_env, as we cannot restore the "main" 1546 * doing in that case. YMMV.
674 * coroutine as Coro has no such concept
675 */ 1547 */
676 PL_top_env = main_top_env; 1548 perlish_exit (aTHX);
677 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1549 }
678} 1550}
679 1551
680static coro_cctx * 1552static coro_cctx *
681cctx_new () 1553cctx_new (void)
682{ 1554{
683 coro_cctx *cctx; 1555 coro_cctx *cctx;
684 void *stack_start;
685 size_t stack_size;
686 1556
687 ++cctx_count; 1557 ++cctx_count;
688
689 Newz (0, cctx, 1, coro_cctx); 1558 New (0, cctx, 1, coro_cctx);
690 1559
691#if HAVE_MMAP 1560 cctx->gen = cctx_gen;
1561 cctx->flags = 0;
1562 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
692 1563
693 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1564 return cctx;
694 /* mmap supposedly does allocate-on-write for us */ 1565}
695 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
696 1566
697 if (cctx->sptr != (void *)-1) 1567/* create a new cctx only suitable as source */
698 { 1568static coro_cctx *
699# if CORO_STACKGUARD 1569cctx_new_empty (void)
700 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1570{
701# endif 1571 coro_cctx *cctx = cctx_new ();
702 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1572
703 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1573 cctx->stack.sptr = 0;
704 cctx->mapped = 1; 1574 coro_create (&cctx->cctx, 0, 0, 0, 0);
1575
1576 return cctx;
1577}
1578
1579/* create a new cctx suitable as destination/running a perl interpreter */
1580static coro_cctx *
1581cctx_new_run (void)
1582{
1583 coro_cctx *cctx = cctx_new ();
1584
1585 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
705 } 1586 {
706 else
707#endif
708 {
709 cctx->ssize = coro_stacksize * (long)sizeof (long);
710 New (0, cctx->sptr, coro_stacksize, long);
711
712 if (!cctx->sptr)
713 {
714 perror ("FATAL: unable to allocate stack for coroutine"); 1587 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
715 _exit (EXIT_FAILURE); 1588 _exit (EXIT_FAILURE);
716 }
717
718 stack_start = cctx->sptr;
719 stack_size = cctx->ssize;
720 } 1589 }
721 1590
722 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
723 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1591 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
724 1592
725 return cctx; 1593 return cctx;
726} 1594}
727 1595
728static void 1596static void
729cctx_destroy (coro_cctx *cctx) 1597cctx_destroy (coro_cctx *cctx)
730{ 1598{
731 if (!cctx) 1599 if (!cctx)
732 return; 1600 return;
733 1601
1602 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1603
734 --cctx_count; 1604 --cctx_count;
1605 coro_destroy (&cctx->cctx);
735 1606
736#if CORO_USE_VALGRIND 1607 coro_stack_free (&cctx->stack);
737 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
738#endif
739
740#if HAVE_MMAP
741 if (cctx->mapped)
742 munmap (cctx->sptr, cctx->ssize);
743 else
744#endif
745 Safefree (cctx->sptr);
746 1608
747 Safefree (cctx); 1609 Safefree (cctx);
748} 1610}
1611
1612/* wether this cctx should be destructed */
1613#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
749 1614
750static coro_cctx * 1615static coro_cctx *
751cctx_get (pTHX) 1616cctx_get (pTHX)
752{ 1617{
753 while (cctx_first) 1618 while (ecb_expect_true (cctx_first))
754 { 1619 {
755 coro_cctx *cctx = cctx_first; 1620 coro_cctx *cctx = cctx_first;
756 cctx_first = cctx->next; 1621 cctx_first = cctx->next;
757 --cctx_idle; 1622 --cctx_idle;
758 1623
759 if (cctx->ssize >= coro_stacksize) 1624 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
760 return cctx; 1625 return cctx;
761 1626
762 cctx_destroy (cctx); 1627 cctx_destroy (cctx);
763 } 1628 }
764 1629
765 PL_op = PL_op->op_next;
766 return cctx_new (); 1630 return cctx_new_run ();
767} 1631}
768 1632
769static void 1633static void
770cctx_put (coro_cctx *cctx) 1634cctx_put (coro_cctx *cctx)
771{ 1635{
1636 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1637
772 /* free another cctx if overlimit */ 1638 /* free another cctx if overlimit */
773 if (cctx_idle >= MAX_IDLE_CCTX) 1639 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
774 { 1640 {
775 coro_cctx *first = cctx_first; 1641 coro_cctx *first = cctx_first;
776 cctx_first = first->next; 1642 cctx_first = first->next;
777 --cctx_idle; 1643 --cctx_idle;
778 1644
779 assert (!first->inuse);
780 cctx_destroy (first); 1645 cctx_destroy (first);
781 } 1646 }
782 1647
783 ++cctx_idle; 1648 ++cctx_idle;
784 cctx->next = cctx_first; 1649 cctx->next = cctx_first;
785 cctx_first = cctx; 1650 cctx_first = cctx;
786} 1651}
787 1652
788/** coroutine switching *****************************************************/ 1653/** coroutine switching *****************************************************/
789 1654
790/* never call directly, always through the coro_state_transfer global variable */ 1655static void
791static void NOINLINE
792transfer (pTHX_ struct coro *prev, struct coro *next) 1656transfer_check (pTHX_ struct coro *prev, struct coro *next)
1657{
1658 /* TODO: throwing up here is considered harmful */
1659
1660 if (ecb_expect_true (prev != next))
1661 {
1662 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1663 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1664
1665 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1666 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1667
1668#if !PERL_VERSION_ATLEAST (5,10,0)
1669 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1670 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1671#endif
1672 }
1673}
1674
1675/* always use the TRANSFER macro */
1676static void ecb_noinline /* noinline so we have a fixed stackframe */
1677transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
793{ 1678{
794 dSTACKLEVEL; 1679 dSTACKLEVEL;
795 1680
796 /* sometimes transfer is only called to set idle_sp */ 1681 /* sometimes transfer is only called to set idle_sp */
797 if (!next) 1682 if (ecb_expect_false (!prev))
798 { 1683 {
799 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1684 cctx_current->idle_sp = STACKLEVEL;
800 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1685 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
801 }
802 else if (prev != next)
803 { 1686 }
1687 else if (ecb_expect_true (prev != next))
1688 {
804 coro_cctx *prev__cctx; 1689 coro_cctx *cctx_prev;
805 1690
806 if (prev->flags & CF_NEW) 1691 if (ecb_expect_false (prev->flags & CF_NEW))
807 { 1692 {
808 /* create a new empty context */ 1693 /* create a new empty/source context */
809 Newz (0, prev->cctx, 1, coro_cctx);
810 prev->cctx->inuse = 1;
811 prev->flags &= ~CF_NEW; 1694 prev->flags &= ~CF_NEW;
812 prev->flags |= CF_RUNNING; 1695 prev->flags |= CF_RUNNING;
813 } 1696 }
814 1697
815 /*TODO: must not croak here */
816 if (!prev->flags & CF_RUNNING)
817 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
818
819 if (next->flags & CF_RUNNING)
820 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
821
822 if (next->flags & CF_DESTROYED)
823 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
824
825 prev->flags &= ~CF_RUNNING; 1698 prev->flags &= ~CF_RUNNING;
826 next->flags |= CF_RUNNING; 1699 next->flags |= CF_RUNNING;
827 1700
828 LOCK; 1701 /* first get rid of the old state */
1702 save_perl (aTHX_ prev);
829 1703
830 if (next->flags & CF_NEW) 1704 if (ecb_expect_false (next->flags & CF_NEW))
831 { 1705 {
832 /* need to start coroutine */ 1706 /* need to start coroutine */
833 next->flags &= ~CF_NEW; 1707 next->flags &= ~CF_NEW;
834 /* first get rid of the old state */
835 save_perl (aTHX_ prev);
836 /* setup coroutine call */ 1708 /* setup coroutine call */
837 setup_coro (aTHX_ next); 1709 init_perl (aTHX_ next);
838 /* need a new stack */
839 assert (!next->cctx);
840 } 1710 }
841 else 1711 else
1712 load_perl (aTHX_ next);
1713
1714 /* possibly untie and reuse the cctx */
1715 if (ecb_expect_true (
1716 cctx_current->idle_sp == STACKLEVEL
1717 && !(cctx_current->flags & CC_TRACE)
1718 && !force_cctx
1719 ))
842 { 1720 {
843 /* coroutine already started */ 1721 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
844 save_perl (aTHX_ prev); 1722 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
845 load_perl (aTHX_ next); 1723
1724 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1725 /* without this the next cctx_get might destroy the running cctx while still in use */
1726 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1727 if (ecb_expect_true (!next->cctx))
1728 next->cctx = cctx_get (aTHX);
1729
1730 cctx_put (cctx_current);
846 } 1731 }
1732 else
1733 prev->cctx = cctx_current;
847 1734
848 prev__cctx = prev->cctx; 1735 ++next->usecount;
849 1736
850 /* possibly "free" the cctx */ 1737 cctx_prev = cctx_current;
851 if (prev__cctx->idle_sp == STACKLEVEL) 1738 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1739
1740 next->cctx = 0;
1741
1742 if (ecb_expect_false (cctx_prev != cctx_current))
852 { 1743 {
853 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1744 cctx_prev->top_env = PL_top_env;
854 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1745 PL_top_env = cctx_current->top_env;
855 1746 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
856 prev->cctx = 0;
857
858 cctx_put (prev__cctx);
859 prev__cctx->inuse = 0;
860 } 1747 }
861 1748
862 if (!next->cctx) 1749 transfer_tail (aTHX);
863 {
864 next->cctx = cctx_get (aTHX);
865 assert (!next->cctx->inuse);
866 next->cctx->inuse = 1;
867 }
868
869 if (prev__cctx != next->cctx)
870 {
871 prev__cctx->top_env = PL_top_env;
872 PL_top_env = next->cctx->top_env;
873 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
874 }
875
876 free_coro_mortal (aTHX);
877 UNLOCK;
878 } 1750 }
879} 1751}
880 1752
881struct transfer_args 1753#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
882{
883 struct coro *prev, *next;
884};
885
886#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1754#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
887 1755
888/** high level stuff ********************************************************/ 1756/** high level stuff ********************************************************/
889 1757
1758/* this function is actually Coro, not Coro::State, but we call it from here */
1759/* because it is convenient - but it hasn't been declared yet for that reason */
890static int 1760static void
1761coro_call_on_destroy (pTHX_ struct coro *coro);
1762
1763static void
891coro_state_destroy (pTHX_ struct coro *coro) 1764coro_state_destroy (pTHX_ struct coro *coro)
892{ 1765{
893 if (coro->flags & CF_DESTROYED) 1766 if (coro->flags & CF_ZOMBIE)
894 return 0; 1767 return;
895 1768
1769 slf_destroy (aTHX_ coro);
1770
896 coro->flags |= CF_DESTROYED; 1771 coro->flags |= CF_ZOMBIE;
897 1772
898 if (coro->flags & CF_READY) 1773 if (coro->flags & CF_READY)
899 { 1774 {
900 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1775 /* reduce nready, as destroying a ready coro effectively unreadies it */
901 /* alternative: look through all ready queues and remove the coro */ 1776 /* alternative: look through all ready queues and remove the coro */
902 LOCK;
903 --coro_nready; 1777 --coro_nready;
904 UNLOCK;
905 } 1778 }
906 else 1779 else
907 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1780 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
908
909 if (coro->mainstack && coro->mainstack != main_mainstack)
910 {
911 struct coro temp;
912
913 assert (!(coro->flags & CF_RUNNING));
914
915 Zero (&temp, 1, struct coro);
916 temp.save = CORO_SAVE_ALL;
917
918 if (coro->flags & CF_RUNNING)
919 croak ("FATAL: tried to destroy currently running coroutine");
920
921 save_perl (aTHX_ &temp);
922 load_perl (aTHX_ coro);
923
924 coro_destroy_stacks (aTHX);
925
926 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
927
928 coro->mainstack = 0;
929 }
930
931 cctx_destroy (coro->cctx);
932 SvREFCNT_dec (coro->args);
933 1781
934 if (coro->next) coro->next->prev = coro->prev; 1782 if (coro->next) coro->next->prev = coro->prev;
935 if (coro->prev) coro->prev->next = coro->next; 1783 if (coro->prev) coro->prev->next = coro->next;
936 if (coro == coro_first) coro_first = coro->next; 1784 if (coro == coro_first) coro_first = coro->next;
937 1785
938 return 1; 1786 if (coro->mainstack
1787 && coro->mainstack != main_mainstack
1788 && coro->slot
1789 && !PL_dirty)
1790 destroy_perl (aTHX_ coro);
1791
1792 cctx_destroy (coro->cctx);
1793 SvREFCNT_dec (coro->startcv);
1794 SvREFCNT_dec (coro->args);
1795 SvREFCNT_dec (coro->swap_sv);
1796 SvREFCNT_dec (CORO_THROW);
1797
1798 coro_call_on_destroy (aTHX_ coro);
1799
1800 /* more destruction mayhem in coro_state_free */
939} 1801}
940 1802
941static int 1803static int
942coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1804coro_state_free (pTHX_ SV *sv, MAGIC *mg)
943{ 1805{
944 struct coro *coro = (struct coro *)mg->mg_ptr; 1806 struct coro *coro = (struct coro *)mg->mg_ptr;
945 mg->mg_ptr = 0; 1807 mg->mg_ptr = 0;
946 1808
947 coro->hv = 0;
948
949 if (--coro->refcnt < 0)
950 {
951 coro_state_destroy (aTHX_ coro); 1809 coro_state_destroy (aTHX_ coro);
1810 SvREFCNT_dec (coro->on_destroy);
1811 SvREFCNT_dec (coro->status);
1812
952 Safefree (coro); 1813 Safefree (coro);
953 }
954 1814
955 return 0; 1815 return 0;
956} 1816}
957 1817
958static int 1818static int ecb_cold
959coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1819coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
960{ 1820{
961 struct coro *coro = (struct coro *)mg->mg_ptr; 1821 /* called when perl clones the current process the slow way (windows process emulation) */
962 1822 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
963 ++coro->refcnt; 1823 mg->mg_ptr = 0;
1824 mg->mg_virtual = 0;
964 1825
965 return 0; 1826 return 0;
966} 1827}
967 1828
968static MGVTBL coro_state_vtbl = { 1829static MGVTBL coro_state_vtbl = {
… …
974#else 1835#else
975# define MGf_DUP 0 1836# define MGf_DUP 0
976#endif 1837#endif
977}; 1838};
978 1839
979static struct coro *
980SvSTATE_ (pTHX_ SV *coro)
981{
982 HV *stash;
983 MAGIC *mg;
984
985 if (SvROK (coro))
986 coro = SvRV (coro);
987
988 stash = SvSTASH (coro);
989 if (stash != coro_stash && stash != coro_state_stash)
990 {
991 /* very slow, but rare, check */
992 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
993 croak ("Coro::State object required");
994 }
995
996 mg = CORO_MAGIC (coro);
997 return (struct coro *)mg->mg_ptr;
998}
999
1000#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
1001
1002static void 1840static void
1003prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1841prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1004{ 1842{
1005 ta->prev = SvSTATE (prev_sv); 1843 ta->prev = SvSTATE (prev_sv);
1006 ta->next = SvSTATE (next_sv); 1844 ta->next = SvSTATE (next_sv);
1845 TRANSFER_CHECK (*ta);
1007} 1846}
1008 1847
1009static void 1848static void
1010api_transfer (SV *prev_sv, SV *next_sv) 1849api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1850{
1851 struct coro_transfer_args ta;
1852
1853 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1854 TRANSFER (ta, 1);
1855}
1856
1857/** Coro ********************************************************************/
1858
1859ecb_inline void
1860coro_enq (pTHX_ struct coro *coro)
1861{
1862 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1863
1864 SvREFCNT_inc_NN (coro->hv);
1865
1866 coro->next_ready = 0;
1867 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1868 ready [1] = coro;
1869}
1870
1871ecb_inline struct coro *
1872coro_deq (pTHX)
1873{
1874 int prio;
1875
1876 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1877 {
1878 struct coro **ready = coro_ready [prio];
1879
1880 if (ready [0])
1881 {
1882 struct coro *coro = ready [0];
1883 ready [0] = coro->next_ready;
1884 return coro;
1885 }
1886 }
1887
1888 return 0;
1889}
1890
1891static void
1892invoke_sv_ready_hook_helper (void)
1011{ 1893{
1012 dTHX; 1894 dTHX;
1013 struct transfer_args ta; 1895 dSP;
1014 1896
1015 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1897 ENTER;
1016 TRANSFER (ta); 1898 SAVETMPS;
1899
1900 PUSHMARK (SP);
1901 PUTBACK;
1902 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1903
1904 FREETMPS;
1905 LEAVE;
1017} 1906}
1018 1907
1019static int 1908static int
1020api_save (SV *coro_sv, int new_save) 1909api_ready (pTHX_ SV *coro_sv)
1021{ 1910{
1022 dTHX;
1023 struct coro *coro = SvSTATE (coro_sv); 1911 struct coro *coro = SvSTATE (coro_sv);
1024 int old_save = coro->save;
1025
1026 if (new_save >= 0)
1027 coro->save = new_save;
1028
1029 return old_save;
1030}
1031
1032/** Coro ********************************************************************/
1033
1034static void
1035coro_enq (pTHX_ SV *coro_sv)
1036{
1037 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1038}
1039
1040static SV *
1041coro_deq (pTHX_ int min_prio)
1042{
1043 int prio = PRIO_MAX - PRIO_MIN;
1044
1045 min_prio -= PRIO_MIN;
1046 if (min_prio < 0)
1047 min_prio = 0;
1048
1049 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1050 if (AvFILLp (coro_ready [prio]) >= 0)
1051 return av_shift (coro_ready [prio]);
1052
1053 return 0;
1054}
1055
1056static int
1057api_ready (SV *coro_sv)
1058{
1059 dTHX;
1060 struct coro *coro;
1061
1062 if (SvROK (coro_sv))
1063 coro_sv = SvRV (coro_sv);
1064
1065 coro = SvSTATE (coro_sv);
1066 1912
1067 if (coro->flags & CF_READY) 1913 if (coro->flags & CF_READY)
1068 return 0; 1914 return 0;
1069 1915
1070 coro->flags |= CF_READY; 1916 coro->flags |= CF_READY;
1071 1917
1072 LOCK; 1918 coro_enq (aTHX_ coro);
1073 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1919
1074 ++coro_nready; 1920 if (!coro_nready++)
1075 UNLOCK; 1921 if (coroapi.readyhook)
1922 coroapi.readyhook ();
1076 1923
1077 return 1; 1924 return 1;
1078} 1925}
1079 1926
1080static int 1927static int
1081api_is_ready (SV *coro_sv) 1928api_is_ready (pTHX_ SV *coro_sv)
1082{ 1929{
1083 dTHX;
1084 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1930 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1085} 1931}
1086 1932
1933/* expects to own a reference to next->hv */
1934ecb_inline void
1935prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1936{
1937 SV *prev_sv = SvRV (coro_current);
1938
1939 ta->prev = SvSTATE_hv (prev_sv);
1940 ta->next = next;
1941
1942 TRANSFER_CHECK (*ta);
1943
1944 SvRV_set (coro_current, (SV *)next->hv);
1945
1946 free_coro_mortal (aTHX);
1947 coro_mortal = prev_sv;
1948}
1949
1087static void 1950static void
1088prepare_schedule (pTHX_ struct transfer_args *ta) 1951prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1089{ 1952{
1090 SV *prev_sv, *next_sv;
1091
1092 for (;;) 1953 for (;;)
1093 { 1954 {
1094 LOCK; 1955 struct coro *next = coro_deq (aTHX);
1095 next_sv = coro_deq (aTHX_ PRIO_MIN);
1096 1956
1957 if (ecb_expect_true (next))
1958 {
1959 /* cannot transfer to destroyed coros, skip and look for next */
1960 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1961 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1962 else
1963 {
1964 next->flags &= ~CF_READY;
1965 --coro_nready;
1966
1967 prepare_schedule_to (aTHX_ ta, next);
1968 break;
1969 }
1970 }
1971 else
1972 {
1097 /* nothing to schedule: call the idle handler */ 1973 /* nothing to schedule: call the idle handler */
1098 if (!next_sv) 1974 if (SvROK (sv_idle)
1975 && SvOBJECT (SvRV (sv_idle)))
1976 {
1977 if (SvRV (sv_idle) == SvRV (coro_current))
1978 {
1979 require_pv ("Carp");
1980
1981 {
1982 dSP;
1983
1984 ENTER;
1985 SAVETMPS;
1986
1987 PUSHMARK (SP);
1988 XPUSHs (sv_2mortal (newSVpv ("FATAL: $Coro::idle blocked itself - did you try to block inside an event loop callback? Caught", 0)));
1989 PUTBACK;
1990 call_pv ("Carp::confess", G_VOID | G_DISCARD);
1991
1992 FREETMPS;
1993 LEAVE;
1994 }
1995 }
1996
1997 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1998 api_ready (aTHX_ SvRV (sv_idle));
1999 --coro_nready;
2000 }
2001 else
2002 {
2003 /* TODO: deprecated, remove, cannot work reliably *//*D*/
2004 dSP;
2005
2006 ENTER;
2007 SAVETMPS;
2008
2009 PUSHMARK (SP);
2010 PUTBACK;
2011 call_sv (sv_idle, G_VOID | G_DISCARD);
2012
2013 FREETMPS;
2014 LEAVE;
2015 }
2016 }
2017 }
2018}
2019
2020ecb_inline void
2021prepare_cede (pTHX_ struct coro_transfer_args *ta)
2022{
2023 api_ready (aTHX_ coro_current);
2024 prepare_schedule (aTHX_ ta);
2025}
2026
2027ecb_inline void
2028prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
2029{
2030 SV *prev = SvRV (coro_current);
2031
2032 if (coro_nready)
2033 {
2034 prepare_schedule (aTHX_ ta);
2035 api_ready (aTHX_ prev);
2036 }
2037 else
2038 prepare_nop (aTHX_ ta);
2039}
2040
2041static void
2042api_schedule (pTHX)
2043{
2044 struct coro_transfer_args ta;
2045
2046 prepare_schedule (aTHX_ &ta);
2047 TRANSFER (ta, 1);
2048}
2049
2050static void
2051api_schedule_to (pTHX_ SV *coro_sv)
2052{
2053 struct coro_transfer_args ta;
2054 struct coro *next = SvSTATE (coro_sv);
2055
2056 SvREFCNT_inc_NN (coro_sv);
2057 prepare_schedule_to (aTHX_ &ta, next);
2058}
2059
2060static int
2061api_cede (pTHX)
2062{
2063 struct coro_transfer_args ta;
2064
2065 prepare_cede (aTHX_ &ta);
2066
2067 if (ecb_expect_true (ta.prev != ta.next))
2068 {
2069 TRANSFER (ta, 1);
2070 return 1;
2071 }
2072 else
2073 return 0;
2074}
2075
2076static int
2077api_cede_notself (pTHX)
2078{
2079 if (coro_nready)
2080 {
2081 struct coro_transfer_args ta;
2082
2083 prepare_cede_notself (aTHX_ &ta);
2084 TRANSFER (ta, 1);
2085 return 1;
2086 }
2087 else
2088 return 0;
2089}
2090
2091static void
2092api_trace (pTHX_ SV *coro_sv, int flags)
2093{
2094 struct coro *coro = SvSTATE (coro_sv);
2095
2096 if (coro->flags & CF_RUNNING)
2097 croak ("cannot enable tracing on a running coroutine, caught");
2098
2099 if (flags & CC_TRACE)
2100 {
2101 if (!coro->cctx)
2102 coro->cctx = cctx_new_run ();
2103 else if (!(coro->cctx->flags & CC_TRACE))
2104 croak ("cannot enable tracing on coroutine with custom stack, caught");
2105
2106 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2107 }
2108 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2109 {
2110 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2111
2112 if (coro->flags & CF_RUNNING)
2113 PL_runops = RUNOPS_DEFAULT;
2114 else
2115 coro->slot->runops = RUNOPS_DEFAULT;
2116 }
2117}
2118
2119static void
2120coro_push_av (pTHX_ AV *av, I32 gimme_v)
2121{
2122 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2123 {
2124 dSP;
2125
2126 if (gimme_v == G_SCALAR)
2127 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2128 else
2129 {
2130 int i;
2131 EXTEND (SP, AvFILLp (av) + 1);
2132
2133 for (i = 0; i <= AvFILLp (av); ++i)
2134 PUSHs (AvARRAY (av)[i]);
2135 }
2136
2137 PUTBACK;
2138 }
2139}
2140
2141static void
2142coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2143{
2144 if (!coro->on_destroy)
2145 coro->on_destroy = newAV ();
2146
2147 av_push (coro->on_destroy, cb);
2148}
2149
2150static void
2151slf_destroy_join (pTHX_ struct CoroSLF *frame)
2152{
2153 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2154}
2155
2156static int
2157slf_check_join (pTHX_ struct CoroSLF *frame)
2158{
2159 struct coro *coro = (struct coro *)frame->data;
2160
2161 if (!coro->status)
2162 return 1;
2163
2164 frame->destroy = 0;
2165
2166 coro_push_av (aTHX_ coro->status, GIMME_V);
2167
2168 SvREFCNT_dec ((SV *)coro->hv);
2169
2170 return 0;
2171}
2172
2173static void
2174slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2175{
2176 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2177
2178 if (items > 1)
2179 croak ("join called with too many arguments");
2180
2181 if (coro->status)
2182 frame->prepare = prepare_nop;
2183 else
2184 {
2185 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2186 frame->prepare = prepare_schedule;
2187 }
2188
2189 frame->check = slf_check_join;
2190 frame->destroy = slf_destroy_join;
2191 frame->data = (void *)coro;
2192 SvREFCNT_inc (coro->hv);
2193}
2194
2195static void
2196coro_call_on_destroy (pTHX_ struct coro *coro)
2197{
2198 AV *od = coro->on_destroy;
2199
2200 if (!od)
2201 return;
2202
2203 coro->on_destroy = 0;
2204 sv_2mortal ((SV *)od);
2205
2206 while (AvFILLp (od) >= 0)
2207 {
2208 SV *cb = sv_2mortal (av_pop (od));
2209
2210 /* coro hv's (and only hv's at the moment) are supported as well */
2211 if (SvSTATEhv_p (aTHX_ cb))
2212 api_ready (aTHX_ cb);
2213 else
2214 {
2215 dSP; /* don't disturb outer sp */
2216 PUSHMARK (SP);
2217
2218 if (coro->status)
2219 {
2220 PUTBACK;
2221 coro_push_av (aTHX_ coro->status, G_ARRAY);
2222 SPAGAIN;
2223 }
2224
2225 PUTBACK;
2226 call_sv (cb, G_VOID | G_DISCARD);
2227 }
2228 }
2229}
2230
2231static void
2232coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2233{
2234 AV *av;
2235
2236 if (coro->status)
2237 {
2238 av = coro->status;
2239 av_clear (av);
2240 }
2241 else
2242 av = coro->status = newAV ();
2243
2244 /* items are actually not so common, so optimise for this case */
2245 if (items)
2246 {
2247 int i;
2248
2249 av_extend (av, items - 1);
2250
2251 for (i = 0; i < items; ++i)
2252 av_push (av, SvREFCNT_inc_NN (arg [i]));
2253 }
2254}
2255
2256static void
2257slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2258{
2259 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2260 api_ready (aTHX_ sv_manager);
2261
2262 frame->prepare = prepare_schedule;
2263 frame->check = slf_check_repeat;
2264
2265 /* as a minor optimisation, we could unwind all stacks here */
2266 /* but that puts extra pressure on pp_slf, and is not worth much */
2267 /*coro_unwind_stacks (aTHX);*/
2268}
2269
2270static void
2271slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2272{
2273 HV *coro_hv = (HV *)SvRV (coro_current);
2274
2275 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2276 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2277}
2278
2279static void
2280slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2281{
2282 HV *coro_hv;
2283 struct coro *coro;
2284
2285 if (items <= 0)
2286 croak ("Coro::cancel called without coro object,");
2287
2288 coro = SvSTATE (arg [0]);
2289 coro_hv = coro->hv;
2290
2291 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2292
2293 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2294 {
2295 /* coro currently busy cancelling something, so just notify it */
2296 coro->slf_frame.data = (void *)coro;
2297
2298 frame->prepare = prepare_nop;
2299 frame->check = slf_check_nop;
2300 }
2301 else if (coro_hv == (HV *)SvRV (coro_current))
2302 {
2303 /* cancelling the current coro is allowed, and equals terminate */
2304 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2305 }
2306 else
2307 {
2308 struct coro *self = SvSTATE_current;
2309
2310 if (!self)
2311 croak ("Coro::cancel called outside of thread content,");
2312
2313 /* otherwise we cancel directly, purely for speed reasons
2314 * unfortunately, this requires some magic trickery, as
2315 * somebody else could cancel us, so we have to fight the cancellation.
2316 * this is ugly, and hopefully fully worth the extra speed.
2317 * besides, I can't get the slow-but-safe version working...
2318 */
2319 slf_frame.data = 0;
2320 self->flags |= CF_NOCANCEL;
2321 coro_state_destroy (aTHX_ coro);
2322 self->flags &= ~CF_NOCANCEL;
2323
2324 if (slf_frame.data)
2325 {
2326 /* while we were busy we have been cancelled, so terminate */
2327 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2328 }
2329 else
2330 {
2331 frame->prepare = prepare_nop;
2332 frame->check = slf_check_nop;
2333 }
2334 }
2335}
2336
2337static int
2338slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2339{
2340 frame->prepare = 0;
2341 coro_unwind_stacks (aTHX);
2342
2343 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2344
2345 return 1;
2346}
2347
2348static int
2349safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2350{
2351 if (coro->cctx)
2352 croak ("coro inside C callback, unable to cancel at this time, caught");
2353
2354 if (coro->flags & CF_NEW)
2355 {
2356 coro_set_status (aTHX_ coro, arg, items);
2357 coro_state_destroy (aTHX_ coro);
2358 }
2359 else
2360 {
2361 if (!coro->slf_frame.prepare)
2362 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2363
2364 slf_destroy (aTHX_ coro);
2365
2366 coro_set_status (aTHX_ coro, arg, items);
2367 coro->slf_frame.prepare = prepare_nop;
2368 coro->slf_frame.check = slf_check_safe_cancel;
2369
2370 api_ready (aTHX_ (SV *)coro->hv);
2371 }
2372
2373 return 1;
2374}
2375
2376/*****************************************************************************/
2377/* async pool handler */
2378
2379static int
2380slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2381{
2382 HV *hv = (HV *)SvRV (coro_current);
2383 struct coro *coro = (struct coro *)frame->data;
2384
2385 if (!coro->invoke_cb)
2386 return 1; /* loop till we have invoke */
2387 else
2388 {
2389 hv_store (hv, "desc", sizeof ("desc") - 1,
2390 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2391
2392 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2393
2394 {
2395 dSP;
2396 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2397 PUTBACK;
2398 }
2399
2400 SvREFCNT_dec (GvAV (PL_defgv));
2401 GvAV (PL_defgv) = coro->invoke_av;
2402 coro->invoke_av = 0;
2403
2404 return 0;
2405 }
2406}
2407
2408static void
2409slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2410{
2411 HV *hv = (HV *)SvRV (coro_current);
2412 struct coro *coro = SvSTATE_hv ((SV *)hv);
2413
2414 if (ecb_expect_true (coro->saved_deffh))
2415 {
2416 /* subsequent iteration */
2417 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2418 coro->saved_deffh = 0;
2419
2420 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2421 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2422 {
2423 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2424 return;
2425 }
2426 else
2427 {
2428 av_clear (GvAV (PL_defgv));
2429 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2430
2431 if (ecb_expect_false (coro->swap_sv))
2432 {
2433 swap_svs_leave (coro);
2434 SvREFCNT_dec_NN (coro->swap_sv);
2435 coro->swap_sv = 0;
2436 }
2437
2438 coro->prio = 0;
2439
2440 if (ecb_expect_false (coro->cctx) && ecb_expect_false (coro->cctx->flags & CC_TRACE))
2441 api_trace (aTHX_ coro_current, 0);
2442
2443 frame->prepare = prepare_schedule;
2444 av_push (av_async_pool, SvREFCNT_inc (hv));
2445 }
2446 }
2447 else
2448 {
2449 /* first iteration, simply fall through */
2450 frame->prepare = prepare_nop;
2451 }
2452
2453 frame->check = slf_check_pool_handler;
2454 frame->data = (void *)coro;
2455}
2456
2457/*****************************************************************************/
2458/* rouse callback */
2459
2460#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2461
2462static void
2463coro_rouse_callback (pTHX_ CV *cv)
2464{
2465 dXSARGS;
2466 SV *data = (SV *)S_GENSUB_ARG;
2467
2468 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2469 {
2470 /* first call, set args */
2471 SV *coro = SvRV (data);
2472 AV *av = newAV ();
2473
2474 SvRV_set (data, (SV *)av);
2475
2476 /* better take a full copy of the arguments */
2477 while (items--)
2478 av_store (av, items, newSVsv (ST (items)));
2479
2480 api_ready (aTHX_ coro);
2481 SvREFCNT_dec (coro);
2482 }
2483
2484 XSRETURN_EMPTY;
2485}
2486
2487static int
2488slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2489{
2490 SV *data = (SV *)frame->data;
2491
2492 if (CORO_THROW)
2493 return 0;
2494
2495 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2496 return 1;
2497
2498 /* now push all results on the stack */
2499 {
2500 dSP;
2501 AV *av = (AV *)SvRV (data);
2502 int i;
2503
2504 EXTEND (SP, AvFILLp (av) + 1);
2505 for (i = 0; i <= AvFILLp (av); ++i)
2506 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2507
2508 /* we have stolen the elements, so set length to zero and free */
2509 AvFILLp (av) = -1;
2510 av_undef (av);
2511
2512 PUTBACK;
2513 }
2514
2515 return 0;
2516}
2517
2518static void
2519slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2520{
2521 SV *cb;
2522
2523 if (items)
2524 cb = arg [0];
2525 else
2526 {
2527 struct coro *coro = SvSTATE_current;
2528
2529 if (!coro->rouse_cb)
2530 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2531
2532 cb = sv_2mortal (coro->rouse_cb);
2533 coro->rouse_cb = 0;
2534 }
2535
2536 if (!SvROK (cb)
2537 || SvTYPE (SvRV (cb)) != SVt_PVCV
2538 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2539 croak ("Coro::rouse_wait called with illegal callback argument,");
2540
2541 {
2542 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2543 SV *data = (SV *)S_GENSUB_ARG;
2544
2545 frame->data = (void *)data;
2546 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2547 frame->check = slf_check_rouse_wait;
2548 }
2549}
2550
2551static SV *
2552coro_new_rouse_cb (pTHX)
2553{
2554 HV *hv = (HV *)SvRV (coro_current);
2555 struct coro *coro = SvSTATE_hv (hv);
2556 SV *data = newRV_inc ((SV *)hv);
2557 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2558
2559 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2560 SvREFCNT_dec (data); /* magicext increases the refcount */
2561
2562 SvREFCNT_dec (coro->rouse_cb);
2563 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2564
2565 return cb;
2566}
2567
2568/*****************************************************************************/
2569/* schedule-like-function opcode (SLF) */
2570
2571static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2572static const CV *slf_cv;
2573static SV **slf_argv;
2574static int slf_argc, slf_arga; /* count, allocated */
2575static I32 slf_ax; /* top of stack, for restore */
2576
2577/* this restores the stack in the case we patched the entersub, to */
2578/* recreate the stack frame as perl will on following calls */
2579/* since entersub cleared the stack */
2580static OP *
2581pp_restore (pTHX)
2582{
2583 int i;
2584 SV **SP = PL_stack_base + slf_ax;
2585
2586 PUSHMARK (SP);
2587
2588 EXTEND (SP, slf_argc + 1);
2589
2590 for (i = 0; i < slf_argc; ++i)
2591 PUSHs (sv_2mortal (slf_argv [i]));
2592
2593 PUSHs ((SV *)CvGV (slf_cv));
2594
2595 RETURNOP (slf_restore.op_first);
2596}
2597
2598static void
2599slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2600{
2601 SV **arg = (SV **)slf_frame.data;
2602
2603 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2604}
2605
2606static void
2607slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2608{
2609 if (items != 2)
2610 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2611
2612 frame->prepare = slf_prepare_transfer;
2613 frame->check = slf_check_nop;
2614 frame->data = (void *)arg; /* let's hope it will stay valid */
2615}
2616
2617static void
2618slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2619{
2620 frame->prepare = prepare_schedule;
2621 frame->check = slf_check_nop;
2622}
2623
2624static void
2625slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2626{
2627 struct coro *next = (struct coro *)slf_frame.data;
2628
2629 SvREFCNT_inc_NN (next->hv);
2630 prepare_schedule_to (aTHX_ ta, next);
2631}
2632
2633static void
2634slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2635{
2636 if (!items)
2637 croak ("Coro::schedule_to expects a coroutine argument, caught");
2638
2639 frame->data = (void *)SvSTATE (arg [0]);
2640 frame->prepare = slf_prepare_schedule_to;
2641 frame->check = slf_check_nop;
2642}
2643
2644static void
2645slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2646{
2647 api_ready (aTHX_ SvRV (coro_current));
2648
2649 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2650}
2651
2652static void
2653slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2654{
2655 frame->prepare = prepare_cede;
2656 frame->check = slf_check_nop;
2657}
2658
2659static void
2660slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2661{
2662 frame->prepare = prepare_cede_notself;
2663 frame->check = slf_check_nop;
2664}
2665
2666/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2667static void
2668slf_destroy (pTHX_ struct coro *coro)
2669{
2670 struct CoroSLF frame = coro->slf_frame;
2671
2672 /*
2673 * The on_destroy below most likely is from an SLF call.
2674 * Since by definition the SLF call will not finish when we destroy
2675 * the coro, we will have to force-finish it here, otherwise
2676 * cleanup functions cannot call SLF functions.
2677 */
2678 coro->slf_frame.prepare = 0;
2679
2680 /* this callback is reserved for slf functions needing to do cleanup */
2681 if (frame.destroy && frame.prepare && !PL_dirty)
2682 frame.destroy (aTHX_ &frame);
2683}
2684
2685/*
2686 * these not obviously related functions are all rolled into one
2687 * function to increase chances that they all will call transfer with the same
2688 * stack offset
2689 * SLF stands for "schedule-like-function".
2690 */
2691static OP *
2692pp_slf (pTHX)
2693{
2694 I32 checkmark; /* mark SP to see how many elements check has pushed */
2695
2696 /* set up the slf frame, unless it has already been set-up */
2697 /* the latter happens when a new coro has been started */
2698 /* or when a new cctx was attached to an existing coroutine */
2699 if (ecb_expect_true (!slf_frame.prepare))
2700 {
2701 /* first iteration */
2702 dSP;
2703 SV **arg = PL_stack_base + TOPMARK + 1;
2704 int items = SP - arg; /* args without function object */
2705 SV *gv = *sp;
2706
2707 /* do a quick consistency check on the "function" object, and if it isn't */
2708 /* for us, divert to the real entersub */
2709 if (SvTYPE (gv) != SVt_PVGV
2710 || !GvCV (gv)
2711 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2712 return PL_ppaddr[OP_ENTERSUB](aTHX);
2713
2714 if (!(PL_op->op_flags & OPf_STACKED))
2715 {
2716 /* ampersand-form of call, use @_ instead of stack */
2717 AV *av = GvAV (PL_defgv);
2718 arg = AvARRAY (av);
2719 items = AvFILLp (av) + 1;
2720 }
2721
2722 /* now call the init function, which needs to set up slf_frame */
2723 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2724 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2725
2726 /* pop args */
2727 SP = PL_stack_base + POPMARK;
2728
2729 PUTBACK;
2730 }
2731
2732 /* now that we have a slf_frame, interpret it! */
2733 /* we use a callback system not to make the code needlessly */
2734 /* complicated, but so we can run multiple perl coros from one cctx */
2735
2736 do
2737 {
2738 struct coro_transfer_args ta;
2739
2740 slf_frame.prepare (aTHX_ &ta);
2741 TRANSFER (ta, 0);
2742
2743 checkmark = PL_stack_sp - PL_stack_base;
2744 }
2745 while (slf_frame.check (aTHX_ &slf_frame));
2746
2747 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2748
2749 /* exception handling */
2750 if (ecb_expect_false (CORO_THROW))
2751 {
2752 SV *exception = sv_2mortal (CORO_THROW);
2753
2754 CORO_THROW = 0;
2755 sv_setsv (ERRSV, exception);
2756 croak (0);
2757 }
2758
2759 /* return value handling - mostly like entersub */
2760 /* make sure we put something on the stack in scalar context */
2761 if (GIMME_V == G_SCALAR
2762 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2763 {
2764 dSP;
2765 SV **bot = PL_stack_base + checkmark;
2766
2767 if (sp == bot) /* too few, push undef */
2768 bot [1] = &PL_sv_undef;
2769 else /* too many, take last one */
2770 bot [1] = *sp;
2771
2772 SP = bot + 1;
2773
2774 PUTBACK;
2775 }
2776
2777 return NORMAL;
2778}
2779
2780static void
2781api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2782{
2783 int i;
2784 SV **arg = PL_stack_base + ax;
2785 int items = PL_stack_sp - arg + 1;
2786
2787 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2788
2789 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2790 && PL_op->op_ppaddr != pp_slf)
2791 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2792
2793 CvFLAGS (cv) |= CVf_SLF;
2794 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2795 slf_cv = cv;
2796
2797 /* we patch the op, and then re-run the whole call */
2798 /* we have to put the same argument on the stack for this to work */
2799 /* and this will be done by pp_restore */
2800 slf_restore.op_next = (OP *)&slf_restore;
2801 slf_restore.op_type = OP_CUSTOM;
2802 slf_restore.op_ppaddr = pp_restore;
2803 slf_restore.op_first = PL_op;
2804
2805 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2806
2807 if (PL_op->op_flags & OPf_STACKED)
2808 {
2809 if (items > slf_arga)
2810 {
2811 slf_arga = items;
2812 Safefree (slf_argv);
2813 New (0, slf_argv, slf_arga, SV *);
2814 }
2815
2816 slf_argc = items;
2817
2818 for (i = 0; i < items; ++i)
2819 slf_argv [i] = SvREFCNT_inc (arg [i]);
2820 }
2821 else
2822 slf_argc = 0;
2823
2824 PL_op->op_ppaddr = pp_slf;
2825 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2826
2827 PL_op = (OP *)&slf_restore;
2828}
2829
2830/*****************************************************************************/
2831/* dynamic wind */
2832
2833static void
2834on_enterleave_call (pTHX_ SV *cb)
2835{
2836 dSP;
2837
2838 PUSHSTACK;
2839
2840 PUSHMARK (SP);
2841 PUTBACK;
2842 call_sv (cb, G_VOID | G_DISCARD);
2843 SPAGAIN;
2844
2845 POPSTACK;
2846}
2847
2848static SV *
2849coro_avp_pop_and_free (pTHX_ AV **avp)
2850{
2851 AV *av = *avp;
2852 SV *res = av_pop (av);
2853
2854 if (AvFILLp (av) < 0)
2855 {
2856 *avp = 0;
2857 SvREFCNT_dec (av);
2858 }
2859
2860 return res;
2861}
2862
2863static void
2864coro_pop_on_enter (pTHX_ void *coro)
2865{
2866 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2867 SvREFCNT_dec (cb);
2868}
2869
2870static void
2871coro_pop_on_leave (pTHX_ void *coro)
2872{
2873 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2874 on_enterleave_call (aTHX_ sv_2mortal (cb));
2875}
2876
2877static void
2878enterleave_hook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, void *arg)
2879{
2880 if (!hook)
2881 return;
2882
2883 if (!*avp)
2884 {
2885 *avp = newAV ();
2886 AvREAL_off (*avp);
2887 }
2888
2889 av_push (*avp, (SV *)hook);
2890 av_push (*avp, (SV *)arg);
2891}
2892
2893static void
2894enterleave_unhook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, int execute)
2895{
2896 AV *av = *avp;
2897 int i;
2898
2899 if (!av)
2900 return;
2901
2902 for (i = AvFILLp (av) - 1; i >= 0; i -= 2)
2903 if (AvARRAY (av)[i] == (SV *)hook)
2904 {
2905 if (execute)
2906 hook (aTHX_ (void *)AvARRAY (av)[i + 1]);
2907
2908 memmove (AvARRAY (av) + i, AvARRAY (av) + i + 2, AvFILLp (av) - i - 1);
2909 av_pop (av);
2910 av_pop (av);
2911 break;
2912 }
2913
2914 if (AvFILLp (av) >= 0)
2915 {
2916 *avp = 0;
2917 SvREFCNT_dec_NN (av);
2918 }
2919}
2920
2921static void
2922api_enterleave_hook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2923{
2924 struct coro *coro = SvSTATE (coro_sv);
2925
2926 if (SvSTATE_current == coro)
2927 if (enter)
2928 enter (aTHX_ enter_arg);
2929
2930 enterleave_hook_xs (aTHX_ coro, &coro->on_enter_xs, enter, enter_arg);
2931 enterleave_hook_xs (aTHX_ coro, &coro->on_leave_xs, leave, leave_arg);
2932}
2933
2934static void
2935api_enterleave_unhook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, coro_enterleave_hook leave)
2936{
2937 struct coro *coro = SvSTATE (coro_sv);
2938
2939 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2940 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, SvSTATE_current == coro);
2941}
2942
2943static void
2944savedestructor_unhook_enter (pTHX_ coro_enterleave_hook enter)
2945{
2946 struct coro *coro = SvSTATE_current;
2947
2948 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2949}
2950
2951static void
2952savedestructor_unhook_leave (pTHX_ coro_enterleave_hook leave)
2953{
2954 struct coro *coro = SvSTATE_current;
2955
2956 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, 1);
2957}
2958
2959static void
2960api_enterleave_scope_hook (pTHX_ coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2961{
2962 api_enterleave_hook (aTHX_ coro_current, enter, enter_arg, leave, leave_arg);
2963
2964 /* this ought to be much cheaper than malloc + a single destructor call */
2965 if (enter) SAVEDESTRUCTOR_X (savedestructor_unhook_enter, enter);
2966 if (leave) SAVEDESTRUCTOR_X (savedestructor_unhook_leave, leave);
2967}
2968
2969/*****************************************************************************/
2970/* PerlIO::cede */
2971
2972typedef struct
2973{
2974 PerlIOBuf base;
2975 NV next, every;
2976} PerlIOCede;
2977
2978static IV ecb_cold
2979PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2980{
2981 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2982
2983 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2984 self->next = nvtime () + self->every;
2985
2986 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2987}
2988
2989static SV * ecb_cold
2990PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2991{
2992 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2993
2994 return newSVnv (self->every);
2995}
2996
2997static IV
2998PerlIOCede_flush (pTHX_ PerlIO *f)
2999{
3000 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
3001 double now = nvtime ();
3002
3003 if (now >= self->next)
3004 {
3005 api_cede (aTHX);
3006 self->next = now + self->every;
3007 }
3008
3009 return PerlIOBuf_flush (aTHX_ f);
3010}
3011
3012static PerlIO_funcs PerlIO_cede =
3013{
3014 sizeof(PerlIO_funcs),
3015 "cede",
3016 sizeof(PerlIOCede),
3017 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
3018 PerlIOCede_pushed,
3019 PerlIOBuf_popped,
3020 PerlIOBuf_open,
3021 PerlIOBase_binmode,
3022 PerlIOCede_getarg,
3023 PerlIOBase_fileno,
3024 PerlIOBuf_dup,
3025 PerlIOBuf_read,
3026 PerlIOBuf_unread,
3027 PerlIOBuf_write,
3028 PerlIOBuf_seek,
3029 PerlIOBuf_tell,
3030 PerlIOBuf_close,
3031 PerlIOCede_flush,
3032 PerlIOBuf_fill,
3033 PerlIOBase_eof,
3034 PerlIOBase_error,
3035 PerlIOBase_clearerr,
3036 PerlIOBase_setlinebuf,
3037 PerlIOBuf_get_base,
3038 PerlIOBuf_bufsiz,
3039 PerlIOBuf_get_ptr,
3040 PerlIOBuf_get_cnt,
3041 PerlIOBuf_set_ptrcnt,
3042};
3043
3044/*****************************************************************************/
3045/* Coro::Semaphore & Coro::Signal */
3046
3047static SV *
3048coro_waitarray_new (pTHX_ int count)
3049{
3050 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
3051 AV *av = newAV ();
3052 SV **ary;
3053
3054 /* unfortunately, building manually saves memory */
3055 Newx (ary, 2, SV *);
3056 AvALLOC (av) = ary;
3057#if PERL_VERSION_ATLEAST (5,10,0)
3058 AvARRAY (av) = ary;
3059#else
3060 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
3061 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
3062 SvPVX ((SV *)av) = (char *)ary;
3063#endif
3064 AvMAX (av) = 1;
3065 AvFILLp (av) = 0;
3066 ary [0] = newSViv (count);
3067
3068 return newRV_noinc ((SV *)av);
3069}
3070
3071/* semaphore */
3072
3073static void
3074coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
3075{
3076 SV *count_sv = AvARRAY (av)[0];
3077 IV count = SvIVX (count_sv);
3078
3079 count += adjust;
3080 SvIVX (count_sv) = count;
3081
3082 /* now wake up as many waiters as are expected to lock */
3083 while (count > 0 && AvFILLp (av) > 0)
3084 {
3085 SV *cb;
3086
3087 /* swap first two elements so we can shift a waiter */
3088 AvARRAY (av)[0] = AvARRAY (av)[1];
3089 AvARRAY (av)[1] = count_sv;
3090 cb = av_shift (av);
3091
3092 if (SvOBJECT (cb))
3093 {
3094 api_ready (aTHX_ cb);
3095 --count;
3096 }
3097 else if (SvTYPE (cb) == SVt_PVCV)
1099 { 3098 {
1100 dSP; 3099 dSP;
1101 UNLOCK;
1102
1103 ENTER;
1104 SAVETMPS;
1105
1106 PUSHMARK (SP); 3100 PUSHMARK (SP);
3101 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1107 PUTBACK; 3102 PUTBACK;
1108 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 3103 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1109
1110 FREETMPS;
1111 LEAVE;
1112 continue;
1113 } 3104 }
1114 3105
1115 ta->next = SvSTATE (next_sv); 3106 SvREFCNT_dec_NN (cb);
3107 }
3108}
1116 3109
1117 /* cannot transfer to destroyed coros, skip and look for next */ 3110static void
1118 if (ta->next->flags & CF_DESTROYED) 3111coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
3112{
3113 /* call $sem->adjust (0) to possibly wake up some other waiters */
3114 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
3115}
3116
3117static int
3118slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
3119{
3120 AV *av = (AV *)frame->data;
3121 SV *count_sv = AvARRAY (av)[0];
3122 SV *coro_hv = SvRV (coro_current);
3123
3124 frame->destroy = 0;
3125
3126 /* if we are about to throw, don't actually acquire the lock, just throw */
3127 if (ecb_expect_false (CORO_THROW))
3128 {
3129 /* we still might be responsible for the semaphore, so wake up others */
3130 coro_semaphore_adjust (aTHX_ av, 0);
3131
3132 return 0;
3133 }
3134 else if (SvIVX (count_sv) > 0)
3135 {
3136 if (acquire)
3137 SvIVX (count_sv) = SvIVX (count_sv) - 1;
3138 else
3139 coro_semaphore_adjust (aTHX_ av, 0);
3140
3141 return 0;
3142 }
3143 else
3144 {
3145 int i;
3146 /* if we were woken up but can't down, we look through the whole */
3147 /* waiters list and only add us if we aren't in there already */
3148 /* this avoids some degenerate memory usage cases */
3149 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
3150 if (AvARRAY (av)[i] == coro_hv)
3151 return 1;
3152
3153 av_push (av, SvREFCNT_inc (coro_hv));
3154 return 1;
3155 }
3156}
3157
3158static int
3159slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
3160{
3161 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
3162}
3163
3164static int
3165slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
3166{
3167 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3168}
3169
3170static void
3171slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3172{
3173 AV *av = (AV *)SvRV (arg [0]);
3174
3175 if (SvIVX (AvARRAY (av)[0]) > 0)
3176 {
3177 frame->data = (void *)av;
3178 frame->prepare = prepare_nop;
3179 }
3180 else
3181 {
3182 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3183
3184 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3185 frame->prepare = prepare_schedule;
3186 /* to avoid race conditions when a woken-up coro gets terminated */
3187 /* we arrange for a temporary on_destroy that calls adjust (0) */
3188 frame->destroy = coro_semaphore_destroy;
3189 }
3190}
3191
3192static void
3193slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3194{
3195 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3196 frame->check = slf_check_semaphore_down;
3197}
3198
3199static void
3200slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3201{
3202 if (items >= 2)
3203 {
3204 /* callback form */
3205 AV *av = (AV *)SvRV (arg [0]);
3206 SV *cb_cv = s_get_cv_croak (arg [1]);
3207
3208 av_push (av, SvREFCNT_inc_NN (cb_cv));
3209
3210 if (SvIVX (AvARRAY (av)[0]) > 0)
3211 coro_semaphore_adjust (aTHX_ av, 0);
3212
3213 frame->prepare = prepare_nop;
3214 frame->check = slf_check_nop;
3215 }
3216 else
3217 {
3218 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3219 frame->check = slf_check_semaphore_wait;
3220 }
3221}
3222
3223/* signal */
3224
3225static void
3226coro_signal_wake (pTHX_ AV *av, int count)
3227{
3228 SvIVX (AvARRAY (av)[0]) = 0;
3229
3230 /* now signal count waiters */
3231 while (count > 0 && AvFILLp (av) > 0)
3232 {
3233 SV *cb;
3234
3235 /* swap first two elements so we can shift a waiter */
3236 cb = AvARRAY (av)[0];
3237 AvARRAY (av)[0] = AvARRAY (av)[1];
3238 AvARRAY (av)[1] = cb;
3239
3240 cb = av_shift (av);
3241
3242 if (SvTYPE (cb) == SVt_PVCV)
1119 { 3243 {
3244 dSP;
3245 PUSHMARK (SP);
3246 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1120 UNLOCK; 3247 PUTBACK;
1121 SvREFCNT_dec (next_sv); 3248 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1122 /* coro_nready is already taken care of by destroy */
1123 continue;
1124 } 3249 }
3250 else
3251 {
3252 api_ready (aTHX_ cb);
3253 sv_setiv (cb, 0); /* signal waiter */
3254 }
1125 3255
1126 --coro_nready; 3256 SvREFCNT_dec_NN (cb);
1127 UNLOCK;
1128 break;
1129 }
1130 3257
1131 /* free this only after the transfer */ 3258 --count;
1132 prev_sv = SvRV (coro_current); 3259 }
1133 SvRV_set (coro_current, next_sv);
1134 ta->prev = SvSTATE (prev_sv);
1135
1136 assert (ta->next->flags & CF_READY);
1137 ta->next->flags &= ~CF_READY;
1138
1139 LOCK;
1140 free_coro_mortal (aTHX);
1141 coro_mortal = prev_sv;
1142 UNLOCK;
1143}
1144
1145static void
1146prepare_cede (pTHX_ struct transfer_args *ta)
1147{
1148 api_ready (coro_current);
1149 prepare_schedule (aTHX_ ta);
1150} 3260}
1151 3261
1152static int 3262static int
1153prepare_cede_notself (pTHX_ struct transfer_args *ta) 3263slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
1154{ 3264{
1155 if (coro_nready) 3265 /* if we are about to throw, also stop waiting */
3266 return SvROK ((SV *)frame->data) && !CORO_THROW;
3267}
3268
3269static void
3270slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3271{
3272 AV *av = (AV *)SvRV (arg [0]);
3273
3274 if (items >= 2)
3275 {
3276 SV *cb_cv = s_get_cv_croak (arg [1]);
3277 av_push (av, SvREFCNT_inc_NN (cb_cv));
3278
3279 if (SvIVX (AvARRAY (av)[0]))
3280 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3281
3282 frame->prepare = prepare_nop;
3283 frame->check = slf_check_nop;
1156 { 3284 }
1157 SV *prev = SvRV (coro_current); 3285 else if (SvIVX (AvARRAY (av)[0]))
1158 prepare_schedule (aTHX_ ta); 3286 {
1159 api_ready (prev); 3287 SvIVX (AvARRAY (av)[0]) = 0;
1160 return 1; 3288 frame->prepare = prepare_nop;
3289 frame->check = slf_check_nop;
1161 } 3290 }
1162 else 3291 else
3292 {
3293 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3294
3295 av_push (av, waiter);
3296
3297 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3298 frame->prepare = prepare_schedule;
3299 frame->check = slf_check_signal_wait;
3300 }
3301}
3302
3303/*****************************************************************************/
3304/* Coro::AIO */
3305
3306#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3307
3308/* helper storage struct */
3309struct io_state
3310{
3311 int errorno;
3312 I32 laststype; /* U16 in 5.10.0 */
3313 int laststatval;
3314 Stat_t statcache;
3315};
3316
3317static void
3318coro_aio_callback (pTHX_ CV *cv)
3319{
3320 dXSARGS;
3321 AV *state = (AV *)S_GENSUB_ARG;
3322 SV *coro = av_pop (state);
3323 SV *data_sv = newSV (sizeof (struct io_state));
3324
3325 av_extend (state, items - 1);
3326
3327 sv_upgrade (data_sv, SVt_PV);
3328 SvCUR_set (data_sv, sizeof (struct io_state));
3329 SvPOK_only (data_sv);
3330
3331 {
3332 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3333
3334 data->errorno = errno;
3335 data->laststype = PL_laststype;
3336 data->laststatval = PL_laststatval;
3337 data->statcache = PL_statcache;
3338 }
3339
3340 /* now build the result vector out of all the parameters and the data_sv */
3341 {
3342 int i;
3343
3344 for (i = 0; i < items; ++i)
3345 av_push (state, SvREFCNT_inc_NN (ST (i)));
3346 }
3347
3348 av_push (state, data_sv);
3349
3350 api_ready (aTHX_ coro);
3351 SvREFCNT_dec_NN (coro);
3352 SvREFCNT_dec_NN ((AV *)state);
3353}
3354
3355static int
3356slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3357{
3358 AV *state = (AV *)frame->data;
3359
3360 /* if we are about to throw, return early */
3361 /* this does not cancel the aio request, but at least */
3362 /* it quickly returns */
3363 if (CORO_THROW)
1163 return 0; 3364 return 0;
1164}
1165 3365
1166static void 3366 /* one element that is an RV? repeat! */
1167api_schedule (void) 3367 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
1168{
1169 dTHX;
1170 struct transfer_args ta;
1171
1172 prepare_schedule (aTHX_ &ta);
1173 TRANSFER (ta);
1174}
1175
1176static int
1177api_cede (void)
1178{
1179 dTHX;
1180 struct transfer_args ta;
1181
1182 prepare_cede (aTHX_ &ta);
1183
1184 if (ta.prev != ta.next)
1185 {
1186 TRANSFER (ta);
1187 return 1; 3368 return 1;
3369
3370 /* restore status */
3371 {
3372 SV *data_sv = av_pop (state);
3373 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3374
3375 errno = data->errorno;
3376 PL_laststype = data->laststype;
3377 PL_laststatval = data->laststatval;
3378 PL_statcache = data->statcache;
3379
3380 SvREFCNT_dec_NN (data_sv);
1188 } 3381 }
1189 else 3382
3383 /* push result values */
3384 {
3385 dSP;
3386 int i;
3387
3388 EXTEND (SP, AvFILLp (state) + 1);
3389 for (i = 0; i <= AvFILLp (state); ++i)
3390 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3391
3392 PUTBACK;
3393 }
3394
1190 return 0; 3395 return 0;
1191} 3396}
1192 3397
1193static int 3398static void
1194api_cede_notself (void) 3399slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1195{ 3400{
1196 dTHX; 3401 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
1197 struct transfer_args ta; 3402 SV *coro_hv = SvRV (coro_current);
3403 struct coro *coro = SvSTATE_hv (coro_hv);
1198 3404
1199 if (prepare_cede_notself (aTHX_ &ta)) 3405 /* put our coroutine id on the state arg */
1200 { 3406 av_push (state, SvREFCNT_inc_NN (coro_hv));
1201 TRANSFER (ta); 3407
1202 return 1; 3408 /* first see whether we have a non-zero priority and set it as AIO prio */
3409 if (coro->prio)
1203 } 3410 {
1204 else 3411 dSP;
1205 return 0;
1206}
1207 3412
3413 static SV *prio_cv;
3414 static SV *prio_sv;
3415
3416 if (ecb_expect_false (!prio_cv))
3417 {
3418 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3419 prio_sv = newSViv (0);
3420 }
3421
3422 PUSHMARK (SP);
3423 sv_setiv (prio_sv, coro->prio);
3424 XPUSHs (prio_sv);
3425
3426 PUTBACK;
3427 call_sv (prio_cv, G_VOID | G_DISCARD);
3428 }
3429
3430 /* now call the original request */
3431 {
3432 dSP;
3433 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3434 int i;
3435
3436 PUSHMARK (SP);
3437
3438 /* first push all args to the stack */
3439 EXTEND (SP, items + 1);
3440
3441 for (i = 0; i < items; ++i)
3442 PUSHs (arg [i]);
3443
3444 /* now push the callback closure */
3445 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3446
3447 /* now call the AIO function - we assume our request is uncancelable */
3448 PUTBACK;
3449 call_sv ((SV *)req, G_VOID | G_DISCARD);
3450 }
3451
3452 /* now that the request is going, we loop till we have a result */
3453 frame->data = (void *)state;
3454 frame->prepare = prepare_schedule;
3455 frame->check = slf_check_aio_req;
3456}
3457
3458static void
3459coro_aio_req_xs (pTHX_ CV *cv)
3460{
3461 dXSARGS;
3462
3463 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3464
3465 XSRETURN_EMPTY;
3466}
3467
3468/*****************************************************************************/
3469
3470#if CORO_CLONE
3471# include "clone.c"
3472#endif
3473
3474/*****************************************************************************/
3475
3476static SV *
3477coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3478{
3479 SV *coro_sv;
3480 struct coro *coro;
3481 MAGIC *mg;
3482 HV *hv;
3483 SV *cb;
3484 int i;
3485
3486 if (argc > 0)
3487 {
3488 cb = s_get_cv_croak (argv [0]);
3489
3490 if (!is_coro)
3491 {
3492 if (CvISXSUB (cb))
3493 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3494
3495 if (!CvROOT (cb))
3496 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3497 }
3498 }
3499
3500 Newz (0, coro, 1, struct coro);
3501 coro->args = newAV ();
3502 coro->flags = CF_NEW;
3503
3504 if (coro_first) coro_first->prev = coro;
3505 coro->next = coro_first;
3506 coro_first = coro;
3507
3508 coro->hv = hv = newHV ();
3509 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3510 mg->mg_flags |= MGf_DUP;
3511 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3512
3513 if (argc > 0)
3514 {
3515 av_extend (coro->args, argc + is_coro - 1);
3516
3517 if (is_coro)
3518 {
3519 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3520 cb = (SV *)cv_coro_run;
3521 }
3522
3523 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3524
3525 for (i = 1; i < argc; i++)
3526 av_push (coro->args, newSVsv (argv [i]));
3527 }
3528
3529 return coro_sv;
3530}
3531
3532#ifndef __cplusplus
3533ecb_cold XS(boot_Coro__State);
3534#endif
3535
3536#if CORO_JIT
3537
3538static void ecb_noinline ecb_cold
3539pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3540{
3541 dSP;
3542 AV *av = newAV ();
3543
3544 av_store (av, 3, newSVuv (d));
3545 av_store (av, 2, newSVuv (c));
3546 av_store (av, 1, newSVuv (b));
3547 av_store (av, 0, newSVuv (a));
3548
3549 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3550
3551 PUTBACK;
3552}
3553
3554static void ecb_noinline ecb_cold
3555jit_init (pTHX)
3556{
3557 dSP;
3558 SV *load, *save;
3559 char *map_base;
3560 char *load_ptr, *save_ptr;
3561 STRLEN load_len, save_len, map_len;
3562 int count;
3563
3564 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3565
3566 PUSHMARK (SP);
3567 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3568 #include "state.h"
3569 count = call_pv ("Coro::State::_jit", G_ARRAY);
3570 SPAGAIN;
3571
3572 save = POPs; save_ptr = SvPVbyte (save, save_len);
3573 load = POPs; load_ptr = SvPVbyte (load, load_len);
3574
3575 map_len = load_len + save_len + 16;
3576
3577 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3578
3579 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3580
3581 load_perl_slots = (load_save_perl_slots_type)map_base;
3582 memcpy (map_base, load_ptr, load_len);
3583
3584 map_base += (load_len + 15) & ~15;
3585
3586 save_perl_slots = (load_save_perl_slots_type)map_base;
3587 memcpy (map_base, save_ptr, save_len);
3588
3589 /* we are good citizens and try to make the page read-only, so the evil evil */
3590 /* hackers might have it a bit more difficult */
3591 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3592
3593 PUTBACK;
3594 eval_pv ("undef &Coro::State::_jit", 1);
3595}
3596
3597#endif
3598
1208MODULE = Coro::State PACKAGE = Coro::State 3599MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1209 3600
1210PROTOTYPES: DISABLE 3601PROTOTYPES: DISABLE
1211 3602
1212BOOT: 3603BOOT:
1213{ 3604{
3605#define VARx(name,expr,type) if (sizeof (type) < sizeof (expr)) croak ("FATAL: Coro thread context slot '" # name "' too small for this version of perl.");
3606#include "state.h"
1214#ifdef USE_ITHREADS 3607#ifdef USE_ITHREADS
1215 MUTEX_INIT (&coro_mutex); 3608# if CORO_PTHREAD
3609 coro_thx = PERL_GET_CONTEXT;
1216#endif 3610# endif
1217 BOOT_PAGESIZE; 3611#endif
3612 /* perl defines these to check for existance first, but why it doesn't */
3613 /* just create them one at init time is not clear to me, except for */
3614 /* programs trying to delete them, but... */
3615 /* anyway, we declare this as invalid and make sure they are initialised here */
3616 DEFSV;
3617 ERRSV;
3618
3619 cctx_current = cctx_new_empty ();
3620
3621 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3622 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3623
3624 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3625 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3626 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3627
3628 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3629 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1218 3630
1219 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3631 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1220 3632
1221 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 3633 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1222 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV)); 3634 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1223 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1224 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1225 newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
1226 newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF)); 3635 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1227 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 3636 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1228 3637
1229 main_mainstack = PL_mainstack; 3638 main_mainstack = PL_mainstack;
1230 main_top_env = PL_top_env; 3639 main_top_env = PL_top_env;
1231 3640
1232 while (main_top_env->je_prev) 3641 while (main_top_env->je_prev)
1233 main_top_env = main_top_env->je_prev; 3642 main_top_env = main_top_env->je_prev;
1234 3643
3644 {
3645 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3646
3647 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3648 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3649
3650 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3651 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3652 }
3653
1235 coroapi.ver = CORO_API_VERSION; 3654 coroapi.ver = CORO_API_VERSION;
3655 coroapi.rev = CORO_API_REVISION;
3656
1236 coroapi.transfer = api_transfer; 3657 coroapi.transfer = api_transfer;
1237 3658
3659 coroapi.sv_state = SvSTATE_;
3660 coroapi.execute_slf = api_execute_slf;
3661 coroapi.prepare_nop = prepare_nop;
3662 coroapi.prepare_schedule = prepare_schedule;
3663 coroapi.prepare_cede = prepare_cede;
3664 coroapi.prepare_cede_notself = prepare_cede_notself;
3665
3666 time_init (aTHX);
3667
1238 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3668 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3669#if CORO_JIT
3670 PUTBACK;
3671 jit_init (aTHX);
3672 SPAGAIN;
3673#endif
1239} 3674}
1240 3675
1241SV * 3676SV *
1242new (char *klass, ...) 3677new (SV *klass, ...)
3678 ALIAS:
3679 Coro::new = 1
1243 CODE: 3680 CODE:
1244{ 3681 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1245 struct coro *coro;
1246 HV *hv;
1247 int i;
1248
1249 Newz (0, coro, 1, struct coro);
1250 coro->args = newAV ();
1251 coro->save = CORO_SAVE_DEF;
1252 coro->flags = CF_NEW;
1253
1254 if (coro_first) coro_first->prev = coro;
1255 coro->next = coro_first;
1256 coro_first = coro;
1257
1258 coro->hv = hv = newHV ();
1259 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1260 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1261
1262 for (i = 1; i < items; i++)
1263 av_push (coro->args, newSVsv (ST (i)));
1264}
1265 OUTPUT:
1266 RETVAL
1267
1268int
1269save (SV *coro, int new_save = -1)
1270 CODE:
1271 RETVAL = api_save (coro, new_save);
1272 OUTPUT: 3682 OUTPUT:
1273 RETVAL 3683 RETVAL
1274 3684
1275int 3685void
1276save_also (SV *coro_sv, int save_also) 3686transfer (...)
3687 PROTOTYPE: $$
1277 CODE: 3688 CODE:
3689 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3690
3691SV *
3692clone (Coro::State coro)
3693 CODE:
1278{ 3694{
1279 struct coro *coro = SvSTATE (coro_sv); 3695#if CORO_CLONE
1280 RETVAL = coro->save; 3696 struct coro *ncoro = coro_clone (aTHX_ coro);
1281 coro->save |= save_also; 3697 MAGIC *mg;
3698 /* TODO: too much duplication */
3699 ncoro->hv = newHV ();
3700 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3701 mg->mg_flags |= MGf_DUP;
3702 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3703#else
3704 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3705#endif
1282} 3706}
1283 OUTPUT: 3707 OUTPUT:
1284 RETVAL 3708 RETVAL
1285 3709
1286void 3710int
1287_set_stacklevel (...) 3711cctx_stacksize (int new_stacksize = 0)
1288 ALIAS: 3712 PROTOTYPE: ;$
1289 Coro::State::transfer = 1 3713 CODE:
1290 Coro::schedule = 2 3714 RETVAL = cctx_stacksize;
1291 Coro::cede = 3 3715 if (new_stacksize)
1292 Coro::cede_notself = 4
1293 CODE:
1294{
1295 struct transfer_args ta;
1296
1297 switch (ix)
1298 { 3716 {
1299 case 0: 3717 cctx_stacksize = new_stacksize;
1300 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 3718 ++cctx_gen;
1301 ta.next = 0;
1302 break;
1303
1304 case 1:
1305 if (items != 2)
1306 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1307
1308 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1309 break;
1310
1311 case 2:
1312 prepare_schedule (aTHX_ &ta);
1313 break;
1314
1315 case 3:
1316 prepare_cede (aTHX_ &ta);
1317 break;
1318
1319 case 4:
1320 if (!prepare_cede_notself (aTHX_ &ta))
1321 XSRETURN_EMPTY;
1322
1323 break;
1324 } 3719 }
1325
1326 BARRIER;
1327 TRANSFER (ta);
1328
1329 if (GIMME_V != G_VOID && ta.next != ta.prev)
1330 XSRETURN_YES;
1331}
1332
1333bool
1334_destroy (SV *coro_sv)
1335 CODE:
1336 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1337 OUTPUT: 3720 OUTPUT:
1338 RETVAL 3721 RETVAL
1339 3722
1340void 3723int
1341_exit (code) 3724cctx_max_idle (int max_idle = 0)
1342 int code 3725 PROTOTYPE: ;$
1343 PROTOTYPE: $
1344 CODE: 3726 CODE:
1345 _exit (code); 3727 RETVAL = cctx_max_idle;
1346 3728 if (max_idle > 1)
1347int 3729 cctx_max_idle = max_idle;
1348cctx_stacksize (int new_stacksize = 0)
1349 CODE:
1350 RETVAL = coro_stacksize;
1351 if (new_stacksize)
1352 coro_stacksize = new_stacksize;
1353 OUTPUT: 3730 OUTPUT:
1354 RETVAL 3731 RETVAL
1355 3732
1356int 3733int
1357cctx_count () 3734cctx_count ()
3735 PROTOTYPE:
1358 CODE: 3736 CODE:
1359 RETVAL = cctx_count; 3737 RETVAL = cctx_count;
1360 OUTPUT: 3738 OUTPUT:
1361 RETVAL 3739 RETVAL
1362 3740
1363int 3741int
1364cctx_idle () 3742cctx_idle ()
3743 PROTOTYPE:
1365 CODE: 3744 CODE:
1366 RETVAL = cctx_idle; 3745 RETVAL = cctx_idle;
1367 OUTPUT: 3746 OUTPUT:
1368 RETVAL 3747 RETVAL
1369 3748
1370void 3749void
1371list () 3750list ()
3751 PROTOTYPE:
1372 PPCODE: 3752 PPCODE:
1373{ 3753{
1374 struct coro *coro; 3754 struct coro *coro;
1375 for (coro = coro_first; coro; coro = coro->next) 3755 for (coro = coro_first; coro; coro = coro->next)
1376 if (coro->hv) 3756 if (coro->hv)
1377 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv))); 3757 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1378} 3758}
1379 3759
1380void 3760void
1381_eval (Coro::State coro, SV *coderef) 3761call (Coro::State coro, SV *coderef)
3762 ALIAS:
3763 eval = 1
1382 CODE: 3764 CODE:
1383{ 3765{
1384 if (coro->mainstack) 3766 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1385 { 3767 {
1386 struct coro temp; 3768 struct coro *current = SvSTATE_current;
1387 Zero (&temp, 1, struct coro); 3769 struct CoroSLF slf_save;
1388 temp.save = CORO_SAVE_ALL;
1389 3770
1390 if (!(coro->flags & CF_RUNNING)) 3771 if (current != coro)
1391 { 3772 {
3773 PUTBACK;
1392 save_perl (aTHX_ &temp); 3774 save_perl (aTHX_ current);
1393 load_perl (aTHX_ coro); 3775 load_perl (aTHX_ coro);
3776 /* the coro is most likely in an active SLF call.
3777 * while not strictly required (the code we execute is
3778 * not allowed to call any SLF functions), it's cleaner
3779 * to reinitialise the slf_frame and restore it later.
3780 * This might one day allow us to actually do SLF calls
3781 * from code executed here.
3782 */
3783 slf_save = slf_frame;
3784 slf_frame.prepare = 0;
3785 SPAGAIN;
1394 } 3786 }
1395 3787
1396 { 3788 PUSHSTACK;
1397 dSP; 3789
1398 ENTER;
1399 SAVETMPS;
1400 PUSHMARK (SP); 3790 PUSHMARK (SP);
1401 PUTBACK; 3791 PUTBACK;
3792
3793 if (ix)
3794 eval_sv (coderef, 0);
3795 else
1402 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3796 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3797
3798 POPSTACK;
1403 SPAGAIN; 3799 SPAGAIN;
1404 FREETMPS;
1405 LEAVE;
1406 PUTBACK;
1407 }
1408 3800
1409 if (!(coro->flags & CF_RUNNING)) 3801 if (current != coro)
1410 { 3802 {
3803 PUTBACK;
3804 slf_frame = slf_save;
1411 save_perl (aTHX_ coro); 3805 save_perl (aTHX_ coro);
1412 load_perl (aTHX_ &temp); 3806 load_perl (aTHX_ current);
3807 SPAGAIN;
1413 } 3808 }
1414 } 3809 }
1415} 3810}
1416 3811
1417SV * 3812SV *
1418is_ready (Coro::State coro) 3813is_ready (Coro::State coro)
1419 PROTOTYPE: $ 3814 PROTOTYPE: $
1420 ALIAS: 3815 ALIAS:
1421 is_ready = CF_READY 3816 is_ready = CF_READY
1422 is_running = CF_RUNNING 3817 is_running = CF_RUNNING
1423 is_new = CF_NEW 3818 is_new = CF_NEW
1424 is_destroyed = CF_DESTROYED 3819 is_destroyed = CF_ZOMBIE
3820 is_zombie = CF_ZOMBIE
3821 is_suspended = CF_SUSPENDED
1425 CODE: 3822 CODE:
1426 RETVAL = boolSV (coro->flags & ix); 3823 RETVAL = boolSV (coro->flags & ix);
1427 OUTPUT: 3824 OUTPUT:
1428 RETVAL 3825 RETVAL
1429 3826
1430IV 3827void
3828throw (SV *self, SV *exception = &PL_sv_undef)
3829 PROTOTYPE: $;$
3830 CODE:
3831{
3832 struct coro *coro = SvSTATE (self);
3833 struct coro *current = SvSTATE_current;
3834 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3835 SvREFCNT_dec (*exceptionp);
3836 SvGETMAGIC (exception);
3837 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3838
3839 api_ready (aTHX_ self);
3840}
3841
3842void
3843api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3844 PROTOTYPE: $;$
3845 C_ARGS: aTHX_ coro, flags
3846
3847SV *
3848has_cctx (Coro::State coro)
3849 PROTOTYPE: $
3850 CODE:
3851 /* maybe manage the running flag differently */
3852 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3853 OUTPUT:
3854 RETVAL
3855
3856int
3857is_traced (Coro::State coro)
3858 PROTOTYPE: $
3859 CODE:
3860 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3861 OUTPUT:
3862 RETVAL
3863
3864UV
1431rss (Coro::State coro) 3865rss (Coro::State coro)
1432 PROTOTYPE: $ 3866 PROTOTYPE: $
3867 ALIAS:
3868 usecount = 1
1433 CODE: 3869 CODE:
1434 RETVAL = coro_rss (coro); 3870 switch (ix)
3871 {
3872 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3873 case 1: RETVAL = coro->usecount; break;
3874 }
1435 OUTPUT: 3875 OUTPUT:
1436 RETVAL 3876 RETVAL
1437 3877
3878void
3879force_cctx ()
3880 PROTOTYPE:
3881 CODE:
3882 cctx_current->idle_sp = 0;
3883
3884void
3885swap_defsv (Coro::State self)
3886 PROTOTYPE: $
3887 ALIAS:
3888 swap_defav = 1
3889 CODE:
3890 if (!self->slot)
3891 croak ("cannot swap state with coroutine that has no saved state,");
3892 else
3893 {
3894 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3895 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3896
3897 SV *tmp = *src; *src = *dst; *dst = tmp;
3898 }
3899
3900void
3901cancel (Coro::State self)
3902 CODE:
3903 coro_state_destroy (aTHX_ self);
3904
3905SV *
3906enable_times (int enabled = enable_times)
3907 CODE:
3908{
3909 RETVAL = boolSV (enable_times);
3910
3911 if (enabled != enable_times)
3912 {
3913 enable_times = enabled;
3914
3915 coro_times_update ();
3916 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3917 }
3918}
3919 OUTPUT:
3920 RETVAL
3921
3922void
3923times (Coro::State self)
3924 PPCODE:
3925{
3926 struct coro *current = SvSTATE (coro_current);
3927
3928 if (ecb_expect_false (current == self))
3929 {
3930 coro_times_update ();
3931 coro_times_add (SvSTATE (coro_current));
3932 }
3933
3934 EXTEND (SP, 2);
3935 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3936 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3937
3938 if (ecb_expect_false (current == self))
3939 coro_times_sub (SvSTATE (coro_current));
3940}
3941
3942void
3943swap_sv (Coro::State coro, SV *sva, SV *svb)
3944 CODE:
3945{
3946 struct coro *current = SvSTATE_current;
3947 AV *swap_sv;
3948 int i;
3949
3950 sva = SvRV (sva);
3951 svb = SvRV (svb);
3952
3953 if (current == coro)
3954 SWAP_SVS_LEAVE (current);
3955
3956 if (!coro->swap_sv)
3957 coro->swap_sv = newAV ();
3958
3959 swap_sv = coro->swap_sv;
3960
3961 for (i = AvFILLp (swap_sv) - 1; i >= 0; i -= 2)
3962 {
3963 SV *a = AvARRAY (swap_sv)[i ];
3964 SV *b = AvARRAY (swap_sv)[i + 1];
3965
3966 if (a == sva && b == svb)
3967 {
3968 SvREFCNT_dec_NN (a);
3969 SvREFCNT_dec_NN (b);
3970
3971 for (; i <= AvFILLp (swap_sv) - 2; i++)
3972 AvARRAY (swap_sv)[i] = AvARRAY (swap_sv)[i + 2];
3973
3974 AvFILLp (swap_sv) -= 2;
3975
3976 goto removed;
3977 }
3978 }
3979
3980 av_push (swap_sv, SvREFCNT_inc_NN (sva));
3981 av_push (swap_sv, SvREFCNT_inc_NN (svb));
3982
3983 removed:
3984
3985 if (current == coro)
3986 SWAP_SVS_ENTER (current);
3987}
3988
1438 3989
1439MODULE = Coro::State PACKAGE = Coro 3990MODULE = Coro::State PACKAGE = Coro
1440 3991
1441BOOT: 3992BOOT:
1442{ 3993{
1443 int i; 3994 if (SVt_LAST > 32)
3995 croak ("Coro internal error: SVt_LAST > 32, swap_sv might need adjustment");
1444 3996
3997 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3998 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3999 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
4000 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
4001 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
4002 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
4003 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
4004 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
4005
4006 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
4007 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
4008 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
4009 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
4010
1445 coro_stash = gv_stashpv ("Coro", TRUE); 4011 coro_stash = gv_stashpv ("Coro", TRUE);
1446 4012
1447 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 4013 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1448 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 4014 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1449 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 4015 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1450 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 4016 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1451 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 4017 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1452 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 4018 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1453
1454 coro_current = get_sv ("Coro::current", FALSE);
1455 SvREADONLY_on (coro_current);
1456
1457 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1458 coro_ready[i] = newAV ();
1459 4019
1460 { 4020 {
1461 SV *sv = perl_get_sv("Coro::API", 1); 4021 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1462 4022
1463 coroapi.schedule = api_schedule; 4023 coroapi.schedule = api_schedule;
1464 coroapi.save = api_save; 4024 coroapi.schedule_to = api_schedule_to;
1465 coroapi.cede = api_cede; 4025 coroapi.cede = api_cede;
1466 coroapi.cede_notself = api_cede_notself; 4026 coroapi.cede_notself = api_cede_notself;
1467 coroapi.ready = api_ready; 4027 coroapi.ready = api_ready;
1468 coroapi.is_ready = api_is_ready; 4028 coroapi.is_ready = api_is_ready;
1469 coroapi.nready = &coro_nready; 4029 coroapi.nready = coro_nready;
1470 coroapi.current = coro_current; 4030 coroapi.current = coro_current;
1471 4031
4032 coroapi.enterleave_hook = api_enterleave_hook;
4033 coroapi.enterleave_unhook = api_enterleave_unhook;
4034 coroapi.enterleave_scope_hook = api_enterleave_scope_hook;
4035
1472 GCoroAPI = &coroapi; 4036 /*GCoroAPI = &coroapi;*/
1473 sv_setiv (sv, (IV)&coroapi); 4037 sv_setiv (sv, (IV)&coroapi);
1474 SvREADONLY_on (sv); 4038 SvREADONLY_on (sv);
1475 } 4039 }
1476} 4040}
4041
4042SV *
4043async (...)
4044 PROTOTYPE: &@
4045 CODE:
4046 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
4047 api_ready (aTHX_ RETVAL);
4048 OUTPUT:
4049 RETVAL
4050
4051void
4052_destroy (Coro::State coro)
4053 CODE:
4054 /* used by the manager thread */
4055 coro_state_destroy (aTHX_ coro);
4056
4057void
4058on_destroy (Coro::State coro, SV *cb)
4059 CODE:
4060 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
4061
4062void
4063join (...)
4064 CODE:
4065 CORO_EXECUTE_SLF_XS (slf_init_join);
4066
4067void
4068terminate (...)
4069 CODE:
4070 CORO_EXECUTE_SLF_XS (slf_init_terminate);
4071
4072void
4073cancel (...)
4074 CODE:
4075 CORO_EXECUTE_SLF_XS (slf_init_cancel);
4076
4077int
4078safe_cancel (Coro::State self, ...)
4079 C_ARGS: aTHX_ self, &ST (1), items - 1
4080
4081void
4082schedule (...)
4083 CODE:
4084 CORO_EXECUTE_SLF_XS (slf_init_schedule);
4085
4086void
4087schedule_to (...)
4088 CODE:
4089 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
4090
4091void
4092cede_to (...)
4093 CODE:
4094 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
4095
4096void
4097cede (...)
4098 CODE:
4099 CORO_EXECUTE_SLF_XS (slf_init_cede);
4100
4101void
4102cede_notself (...)
4103 CODE:
4104 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1477 4105
1478void 4106void
1479_set_current (SV *current) 4107_set_current (SV *current)
1480 PROTOTYPE: $ 4108 PROTOTYPE: $
1481 CODE: 4109 CODE:
1482 SvREFCNT_dec (SvRV (coro_current)); 4110 SvREFCNT_dec_NN (SvRV (coro_current));
1483 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 4111 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
4112
4113void
4114_set_readyhook (SV *hook)
4115 PROTOTYPE: $
4116 CODE:
4117 SvREFCNT_dec (coro_readyhook);
4118 SvGETMAGIC (hook);
4119 if (SvOK (hook))
4120 {
4121 coro_readyhook = newSVsv (hook);
4122 CORO_READYHOOK = invoke_sv_ready_hook_helper;
4123 }
4124 else
4125 {
4126 coro_readyhook = 0;
4127 CORO_READYHOOK = 0;
4128 }
1484 4129
1485int 4130int
1486prio (Coro::State coro, int newprio = 0) 4131prio (Coro::State coro, int newprio = 0)
4132 PROTOTYPE: $;$
1487 ALIAS: 4133 ALIAS:
1488 nice = 1 4134 nice = 1
1489 CODE: 4135 CODE:
1490{ 4136{
1491 RETVAL = coro->prio; 4137 RETVAL = coro->prio;
… …
1493 if (items > 1) 4139 if (items > 1)
1494 { 4140 {
1495 if (ix) 4141 if (ix)
1496 newprio = coro->prio - newprio; 4142 newprio = coro->prio - newprio;
1497 4143
1498 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 4144 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1499 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 4145 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1500 4146
1501 coro->prio = newprio; 4147 coro->prio = newprio;
1502 } 4148 }
1503} 4149}
1504 OUTPUT: 4150 OUTPUT:
… …
1506 4152
1507SV * 4153SV *
1508ready (SV *self) 4154ready (SV *self)
1509 PROTOTYPE: $ 4155 PROTOTYPE: $
1510 CODE: 4156 CODE:
1511 RETVAL = boolSV (api_ready (self)); 4157 RETVAL = boolSV (api_ready (aTHX_ self));
1512 OUTPUT: 4158 OUTPUT:
1513 RETVAL 4159 RETVAL
1514 4160
1515int 4161int
1516nready (...) 4162nready (...)
… …
1518 CODE: 4164 CODE:
1519 RETVAL = coro_nready; 4165 RETVAL = coro_nready;
1520 OUTPUT: 4166 OUTPUT:
1521 RETVAL 4167 RETVAL
1522 4168
1523MODULE = Coro::State PACKAGE = Coro::AIO 4169void
4170suspend (Coro::State self)
4171 PROTOTYPE: $
4172 CODE:
4173 self->flags |= CF_SUSPENDED;
4174
4175void
4176resume (Coro::State self)
4177 PROTOTYPE: $
4178 CODE:
4179 self->flags &= ~CF_SUSPENDED;
4180
4181void
4182_pool_handler (...)
4183 CODE:
4184 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
4185
4186void
4187async_pool (SV *cv, ...)
4188 PROTOTYPE: &@
4189 PPCODE:
4190{
4191 HV *hv = (HV *)av_pop (av_async_pool);
4192 AV *av = newAV ();
4193 SV *cb = ST (0);
4194 int i;
4195
4196 av_extend (av, items - 2);
4197 for (i = 1; i < items; ++i)
4198 av_push (av, SvREFCNT_inc_NN (ST (i)));
4199
4200 if ((SV *)hv == &PL_sv_undef)
4201 {
4202 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
4203 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
4204 SvREFCNT_dec_NN (sv);
4205 }
4206
4207 {
4208 struct coro *coro = SvSTATE_hv (hv);
4209
4210 assert (!coro->invoke_cb);
4211 assert (!coro->invoke_av);
4212 coro->invoke_cb = SvREFCNT_inc (cb);
4213 coro->invoke_av = av;
4214 }
4215
4216 api_ready (aTHX_ (SV *)hv);
4217
4218 if (GIMME_V != G_VOID)
4219 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4220 else
4221 SvREFCNT_dec_NN (hv);
4222}
1524 4223
1525SV * 4224SV *
1526_get_state () 4225rouse_cb ()
4226 PROTOTYPE:
1527 CODE: 4227 CODE:
1528{ 4228 RETVAL = coro_new_rouse_cb (aTHX);
1529 struct io_state *data;
1530
1531 RETVAL = newSV (sizeof (struct io_state));
1532 data = (struct io_state *)SvPVX (RETVAL);
1533 SvCUR_set (RETVAL, sizeof (struct io_state));
1534 SvPOK_only (RETVAL);
1535
1536 data->errorno = errno;
1537 data->laststype = PL_laststype;
1538 data->laststatval = PL_laststatval;
1539 data->statcache = PL_statcache;
1540}
1541 OUTPUT: 4229 OUTPUT:
1542 RETVAL 4230 RETVAL
1543 4231
1544void 4232void
1545_set_state (char *data_) 4233rouse_wait (...)
4234 PROTOTYPE: ;$
4235 PPCODE:
4236 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4237
4238void
4239on_enter (SV *block)
4240 ALIAS:
4241 on_leave = 1
1546 PROTOTYPE: $ 4242 PROTOTYPE: &
1547 CODE: 4243 CODE:
1548{ 4244{
1549 struct io_state *data = (void *)data_; 4245 struct coro *coro = SvSTATE_current;
4246 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1550 4247
1551 errno = data->errorno; 4248 block = s_get_cv_croak (block);
1552 PL_laststype = data->laststype;
1553 PL_laststatval = data->laststatval;
1554 PL_statcache = data->statcache;
1555}
1556 4249
4250 if (!*avp)
4251 *avp = newAV ();
4252
4253 av_push (*avp, SvREFCNT_inc (block));
4254
4255 if (!ix)
4256 on_enterleave_call (aTHX_ block);
4257
4258 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4259 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4260 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4261}
4262
4263
4264MODULE = Coro::State PACKAGE = PerlIO::cede
4265
4266BOOT:
4267 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4268
4269
4270MODULE = Coro::State PACKAGE = Coro::Semaphore
4271
4272SV *
4273new (SV *klass, SV *count = 0)
4274 CODE:
4275{
4276 int semcnt = 1;
4277
4278 if (count)
4279 {
4280 SvGETMAGIC (count);
4281
4282 if (SvOK (count))
4283 semcnt = SvIV (count);
4284 }
4285
4286 RETVAL = sv_bless (
4287 coro_waitarray_new (aTHX_ semcnt),
4288 GvSTASH (CvGV (cv))
4289 );
4290}
4291 OUTPUT:
4292 RETVAL
4293
4294# helper for Coro::Channel and others
4295SV *
4296_alloc (int count)
4297 CODE:
4298 RETVAL = coro_waitarray_new (aTHX_ count);
4299 OUTPUT:
4300 RETVAL
4301
4302SV *
4303count (SV *self)
4304 CODE:
4305 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4306 OUTPUT:
4307 RETVAL
4308
4309void
4310up (SV *self)
4311 CODE:
4312 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), 1);
4313
4314void
4315adjust (SV *self, int adjust)
4316 CODE:
4317 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), adjust);
4318
4319void
4320down (...)
4321 CODE:
4322 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4323
4324void
4325wait (...)
4326 CODE:
4327 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4328
4329void
4330try (SV *self)
4331 PPCODE:
4332{
4333 AV *av = (AV *)SvRV (self);
4334 SV *count_sv = AvARRAY (av)[0];
4335 IV count = SvIVX (count_sv);
4336
4337 if (count > 0)
4338 {
4339 --count;
4340 SvIVX (count_sv) = count;
4341 XSRETURN_YES;
4342 }
4343 else
4344 XSRETURN_NO;
4345}
4346
4347void
4348waiters (SV *self)
4349 PPCODE:
4350{
4351 AV *av = (AV *)SvRV (self);
4352 int wcount = AvFILLp (av) + 1 - 1;
4353
4354 if (GIMME_V == G_SCALAR)
4355 XPUSHs (sv_2mortal (newSViv (wcount)));
4356 else
4357 {
4358 int i;
4359 EXTEND (SP, wcount);
4360 for (i = 1; i <= wcount; ++i)
4361 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4362 }
4363}
4364
4365MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4366
4367void
4368_may_delete (SV *sem, int count, unsigned int extra_refs)
4369 PPCODE:
4370{
4371 AV *av = (AV *)SvRV (sem);
4372
4373 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4374 && AvFILLp (av) == 0 /* no waiters, just count */
4375 && SvIV (AvARRAY (av)[0]) == count)
4376 XSRETURN_YES;
4377
4378 XSRETURN_NO;
4379}
4380
4381MODULE = Coro::State PACKAGE = Coro::Signal
4382
4383SV *
4384new (SV *klass)
4385 CODE:
4386 RETVAL = sv_bless (
4387 coro_waitarray_new (aTHX_ 0),
4388 GvSTASH (CvGV (cv))
4389 );
4390 OUTPUT:
4391 RETVAL
4392
4393void
4394wait (...)
4395 CODE:
4396 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4397
4398void
4399broadcast (SV *self)
4400 CODE:
4401{
4402 AV *av = (AV *)SvRV (self);
4403 coro_signal_wake (aTHX_ av, AvFILLp (av));
4404}
4405
4406void
4407send (SV *self)
4408 CODE:
4409{
4410 AV *av = (AV *)SvRV (self);
4411
4412 if (AvFILLp (av))
4413 coro_signal_wake (aTHX_ av, 1);
4414 else
4415 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4416}
4417
4418IV
4419awaited (SV *self)
4420 CODE:
4421 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4422 OUTPUT:
4423 RETVAL
4424
4425
4426MODULE = Coro::State PACKAGE = Coro::AnyEvent
4427
4428BOOT:
4429 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4430
4431void
4432_schedule (...)
4433 CODE:
4434{
4435 static int incede;
4436
4437 api_cede_notself (aTHX);
4438
4439 ++incede;
4440 while (coro_nready >= incede && api_cede (aTHX))
4441 ;
4442
4443 sv_setsv (sv_activity, &PL_sv_undef);
4444 if (coro_nready >= incede)
4445 {
4446 PUSHMARK (SP);
4447 PUTBACK;
4448 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4449 }
4450
4451 --incede;
4452}
4453
4454
4455MODULE = Coro::State PACKAGE = Coro::AIO
4456
4457void
4458_register (char *target, char *proto, SV *req)
4459 CODE:
4460{
4461 SV *req_cv = s_get_cv_croak (req);
4462 /* newXSproto doesn't return the CV on 5.8 */
4463 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4464 sv_setpv ((SV *)slf_cv, proto);
4465 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4466}
4467
4468MODULE = Coro::State PACKAGE = Coro::Select
4469
4470void
4471patch_pp_sselect ()
4472 CODE:
4473 if (!coro_old_pp_sselect)
4474 {
4475 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4476 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4477 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4478 }
4479
4480void
4481unpatch_pp_sselect ()
4482 CODE:
4483 if (coro_old_pp_sselect)
4484 {
4485 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4486 coro_old_pp_sselect = 0;
4487 }
4488
4489MODULE = Coro::State PACKAGE = Coro::Util
4490
4491void
4492_exit (int code)
4493 CODE:
4494 _exit (code);
4495
4496NV
4497time ()
4498 CODE:
4499 RETVAL = nvtime (aTHX);
4500 OUTPUT:
4501 RETVAL
4502
4503NV
4504gettimeofday ()
4505 PPCODE:
4506{
4507 UV tv [2];
4508 u2time (aTHX_ tv);
4509 EXTEND (SP, 2);
4510 PUSHs (sv_2mortal (newSVuv (tv [0])));
4511 PUSHs (sv_2mortal (newSVuv (tv [1])));
4512}
4513

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