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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.179 by root, Wed Oct 3 16:03:17 2007 UTC vs.
Revision 1.413 by root, Fri Jun 17 18:55:08 2011 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1
5
1#include "libcoro/coro.c" 6#include "libcoro/coro.c"
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"
17#include "ecb.h"
10 18
19#include <stddef.h>
11#include <stdio.h> 20#include <stdio.h>
12#include <errno.h> 21#include <errno.h>
13#include <assert.h> 22#include <assert.h>
14 23
24#ifndef SVs_PADSTALE
25# define SVs_PADSTALE 0
26#endif
27
28#if defined(_WIN32)
29# undef HAS_GETTIMEOFDAY
30# undef setjmp
31# undef longjmp
32# undef _exit
33# define setjmp _setjmp /* deep magic */
34#else
35# include <inttypes.h> /* most portable stdint.h */
36#endif
37
15#ifdef HAVE_MMAP 38#if HAVE_MMAP
16# include <unistd.h> 39# include <unistd.h>
17# include <sys/mman.h> 40# include <sys/mman.h>
18# ifndef MAP_ANONYMOUS 41# ifndef MAP_ANONYMOUS
19# ifdef MAP_ANON 42# ifdef MAP_ANON
20# define MAP_ANONYMOUS MAP_ANON 43# define MAP_ANONYMOUS MAP_ANON
… …
35# define BOOT_PAGESIZE (void)0 58# define BOOT_PAGESIZE (void)0
36#endif 59#endif
37 60
38#if CORO_USE_VALGRIND 61#if CORO_USE_VALGRIND
39# include <valgrind/valgrind.h> 62# 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 63#endif
44 64
45/* the maximum number of idle cctx that will be pooled */ 65/* the maximum number of idle cctx that will be pooled */
46#define MAX_IDLE_CCTX 8 66static int cctx_max_idle = 4;
47
48#define PERL_VERSION_ATLEAST(a,b,c) \
49 (PERL_REVISION > (a) \
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 67
80#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 68#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
81# undef CORO_STACKGUARD 69# undef CORO_STACKGUARD
82#endif 70#endif
83 71
… …
90# define CORO_PREFER_PERL_FUNCTIONS 0 78# define CORO_PREFER_PERL_FUNCTIONS 0
91#endif 79#endif
92 80
93/* The next macros try to return the current stack pointer, in an as 81/* The next macros try to return the current stack pointer, in an as
94 * portable way as possible. */ 82 * portable way as possible. */
95#define dSTACKLEVEL volatile char stacklevel
96#define STACKLEVEL ((void *)&stacklevel)
97
98#define IN_DESTRUCT (PL_main_cv == Nullcv)
99
100#if __GNUC__ >= 3 83#if __GNUC__ >= 4
101# define attribute(x) __attribute__(x) 84# define dSTACKLEVEL int stacklevel_dummy
102# define BARRIER __asm__ __volatile__ ("" : : : "memory") 85# define STACKLEVEL __builtin_frame_address (0)
103#else 86#else
104# define attribute(x) 87# define dSTACKLEVEL volatile void *stacklevel
105# define BARRIER 88# define STACKLEVEL ((void *)&stacklevel)
106#endif 89#endif
107 90
108#define NOINLINE attribute ((noinline)) 91#define IN_DESTRUCT PL_dirty
109 92
110#include "CoroAPI.h" 93#include "CoroAPI.h"
94#define GCoroAPI (&coroapi) /* very sneaky */
111 95
112#ifdef USE_ITHREADS 96#ifdef USE_ITHREADS
113static perl_mutex coro_mutex; 97# if CORO_PTHREAD
114# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 98static void *coro_thx;
115# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 99# endif
116#else
117# define LOCK (void)0
118# define UNLOCK (void)0
119#endif 100#endif
120 101
121/* helper storage struct for Coro::AIO */ 102/* used in state.h */
122struct io_state 103#define VAR(name,type) VARx(name, PL_ ## name, type)
123{
124 int errorno;
125 I32 laststype;
126 int laststatval;
127 Stat_t statcache;
128};
129 104
105#ifdef __linux
106# include <time.h> /* for timespec */
107# include <syscall.h> /* for SYS_* */
108# ifdef SYS_clock_gettime
109# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
110# define CORO_CLOCK_MONOTONIC 1
111# define CORO_CLOCK_THREAD_CPUTIME_ID 3
112# endif
113#endif
114
115static double (*nvtime)(); /* so why doesn't it take void? */
116static void (*u2time)(pTHX_ UV ret[2]);
117
118/* we hijack an hopefully unused CV flag for our purposes */
119#define CVf_SLF 0x4000
120static OP *pp_slf (pTHX);
121static void slf_destroy (pTHX_ struct coro *coro);
122
123static U32 cctx_gen;
130static size_t coro_stacksize = CORO_STACKSIZE; 124static size_t cctx_stacksize = CORO_STACKSIZE;
131static struct CoroAPI coroapi; 125static struct CoroAPI coroapi;
132static AV *main_mainstack; /* used to differentiate between $main and others */ 126static AV *main_mainstack; /* used to differentiate between $main and others */
133static JMPENV *main_top_env; 127static JMPENV *main_top_env;
134static HV *coro_state_stash, *coro_stash; 128static HV *coro_state_stash, *coro_stash;
135static SV *coro_mortal; /* will be freed after next transfer */ 129static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
136 130
131static AV *av_destroy; /* destruction queue */
132static SV *sv_manager; /* the manager coro */
133static SV *sv_idle; /* $Coro::idle */
134
137static GV *irsgv; /* $/ */ 135static GV *irsgv; /* $/ */
136static GV *stdoutgv; /* *STDOUT */
137static SV *rv_diehook;
138static SV *rv_warnhook;
139static HV *hv_sig; /* %SIG */
138 140
139/* async_pool helper stuff */ 141/* async_pool helper stuff */
140static SV *sv_pool_rss; 142static SV *sv_pool_rss;
141static SV *sv_pool_size; 143static SV *sv_pool_size;
144static SV *sv_async_pool_idle; /* description string */
142static AV *av_async_pool; 145static AV *av_async_pool; /* idle pool */
146static SV *sv_Coro; /* class string */
147static CV *cv_pool_handler;
148
149/* Coro::AnyEvent */
150static SV *sv_activity;
151
152/* enable processtime/realtime profiling */
153static char enable_times;
154typedef U32 coro_ts[2];
155static coro_ts time_real, time_cpu;
156static char times_valid;
143 157
144static struct coro_cctx *cctx_first; 158static struct coro_cctx *cctx_first;
145static int cctx_count, cctx_idle; 159static int cctx_count, cctx_idle;
146 160
147enum { 161enum
162{
148 CC_MAPPED = 0x01, 163 CC_MAPPED = 0x01,
149 CC_NOREUSE = 0x02, /* throw this away after tracing */ 164 CC_NOREUSE = 0x02, /* throw this away after tracing */
150 CC_TRACE = 0x04, 165 CC_TRACE = 0x04,
151 CC_TRACE_SUB = 0x08, /* trace sub calls */ 166 CC_TRACE_SUB = 0x08, /* trace sub calls */
152 CC_TRACE_LINE = 0x10, /* trace each statement */ 167 CC_TRACE_LINE = 0x10, /* trace each statement */
153 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 168 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
154}; 169};
155 170
156/* this is a structure representing a c-level coroutine */ 171/* this is a structure representing a c-level coroutine */
157typedef struct coro_cctx { 172typedef struct coro_cctx
173{
158 struct coro_cctx *next; 174 struct coro_cctx *next;
159 175
160 /* the stack */ 176 /* the stack */
161 void *sptr; 177 void *sptr;
162 size_t ssize; 178 size_t ssize;
… …
165 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 181 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
166 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 182 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
167 JMPENV *top_env; 183 JMPENV *top_env;
168 coro_context cctx; 184 coro_context cctx;
169 185
186 U32 gen;
170#if CORO_USE_VALGRIND 187#if CORO_USE_VALGRIND
171 int valgrind_id; 188 int valgrind_id;
172#endif 189#endif
173 unsigned char flags; 190 unsigned char flags;
174} coro_cctx; 191} coro_cctx;
175 192
193static coro_cctx *cctx_current; /* the currently running cctx */
194
195/*****************************************************************************/
196
197static MGVTBL coro_state_vtbl;
198
176enum { 199enum
200{
177 CF_RUNNING = 0x0001, /* coroutine is running */ 201 CF_RUNNING = 0x0001, /* coroutine is running */
178 CF_READY = 0x0002, /* coroutine is ready */ 202 CF_READY = 0x0002, /* coroutine is ready */
179 CF_NEW = 0x0004, /* has never been switched to */ 203 CF_NEW = 0x0004, /* has never been switched to */
180 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 204 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
205 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
206 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
181}; 207};
182 208
209/* the structure where most of the perl state is stored, overlaid on the cxstack */
210typedef struct
211{
212#define VARx(name,expr,type) type name;
213# include "state.h"
214#undef VARx
215} perl_slots;
216
217/* how many context stack entries do we need for perl_slots */
218#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
219
183/* this is a structure representing a perl-level coroutine */ 220/* this is a structure representing a perl-level coroutine */
184struct coro { 221struct coro
222{
185 /* the c coroutine allocated to this perl coroutine, if any */ 223 /* the C coroutine allocated to this perl coroutine, if any */
186 coro_cctx *cctx; 224 coro_cctx *cctx;
187 225
226 /* ready queue */
227 struct coro *next_ready;
228
229 /* state data */
230 struct CoroSLF slf_frame; /* saved slf frame */
231 AV *mainstack;
232 perl_slots *slot; /* basically the saved sp */
233
234 CV *startcv; /* the CV to execute */
188 /* data associated with this coroutine (initial args) */ 235 AV *args; /* data associated with this coroutine (initial args) */
189 AV *args;
190 int refcnt;
191 int flags; /* CF_ flags */ 236 int flags; /* CF_ flags */
192 237 HV *hv; /* the perl hash associated with this coro, if any */
193 /* optionally saved, might be zero */
194 AV *defav; /* @_ */
195 SV *defsv; /* $_ */
196 SV *errsv; /* $@ */
197 IO *deffh; /* default filehandle */
198 SV *irssv; /* $/ */
199 SV *irssv_sv; /* real $/ cache */
200
201#define VAR(name,type) type name;
202# include "state.h"
203#undef VAR
204 238
205 /* statistics */ 239 /* statistics */
206 int usecount; /* number of switches to this coro */ 240 int usecount; /* number of transfers to this coro */
207 241
208 /* coro process data */ 242 /* coro process data */
209 int prio; 243 int prio;
244 SV *except; /* exception to be thrown */
245 SV *rouse_cb; /* last rouse callback */
246 AV *on_destroy; /* callbacks or coros to notify on destroy */
247 AV *status; /* the exit status list */
248
249 /* async_pool */
250 SV *saved_deffh;
251 SV *invoke_cb;
252 AV *invoke_av;
253
254 /* on_enter/on_leave */
255 AV *on_enter;
256 AV *on_leave;
257
258 /* swap_sv */
259 AV *swap_sv;
260
261 /* times */
262 coro_ts t_cpu, t_real;
210 263
211 /* linked list */ 264 /* linked list */
212 struct coro *next, *prev; 265 struct coro *next, *prev;
213 HV *hv; /* the perl hash associated with this coro, if any */
214}; 266};
215 267
216typedef struct coro *Coro__State; 268typedef struct coro *Coro__State;
217typedef struct coro *Coro__State_or_hashref; 269typedef struct coro *Coro__State_or_hashref;
218 270
271/* the following variables are effectively part of the perl context */
272/* and get copied between struct coro and these variables */
273/* the main reason we don't support windows process emulation */
274static struct CoroSLF slf_frame; /* the current slf frame */
275
219/** Coro ********************************************************************/ 276/** Coro ********************************************************************/
220 277
221#define PRIO_MAX 3 278#define CORO_PRIO_MAX 3
222#define PRIO_HIGH 1 279#define CORO_PRIO_HIGH 1
223#define PRIO_NORMAL 0 280#define CORO_PRIO_NORMAL 0
224#define PRIO_LOW -1 281#define CORO_PRIO_LOW -1
225#define PRIO_IDLE -3 282#define CORO_PRIO_IDLE -3
226#define PRIO_MIN -4 283#define CORO_PRIO_MIN -4
227 284
228/* for Coro.pm */ 285/* for Coro.pm */
229static SV *coro_current; 286static SV *coro_current;
230static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 287static SV *coro_readyhook;
231static int coro_nready; 288static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
289static CV *cv_coro_run;
232static struct coro *coro_first; 290static struct coro *coro_first;
291#define coro_nready coroapi.nready
292
293/** JIT *********************************************************************/
294
295#if CORO_JIT
296 /* APPLE doesn't have HAVE_MMAP though */
297 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
298 #ifndef CORO_JIT_TYPE
299 #if __x86_64 && CORO_JIT_UNIXY
300 #define CORO_JIT_TYPE "amd64-unix"
301 #elif __i386 && CORO_JIT_UNIXY
302 #define CORO_JIT_TYPE "x86-unix"
303 #endif
304 #endif
305#endif
306
307#if !defined(CORO_JIT_TYPE) || !HAVE_MMAP
308 #undef CORO_JIT
309#endif
310
311#if CORO_JIT
312 typedef void (*load_save_perl_slots_type)(perl_slots *);
313 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
314#endif
315
316/** Coro::Select ************************************************************/
317
318static OP *(*coro_old_pp_sselect) (pTHX);
319static SV *coro_select_select;
320
321/* horrible hack, but if it works... */
322static OP *
323coro_pp_sselect (pTHX)
324{
325 dSP;
326 PUSHMARK (SP - 4); /* fake argument list */
327 XPUSHs (coro_select_select);
328 PUTBACK;
329
330 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
331 PL_op->op_flags |= OPf_STACKED;
332 PL_op->op_private = 0;
333 return PL_ppaddr [OP_ENTERSUB](aTHX);
334}
335
336/** time stuff **************************************************************/
337
338#ifdef HAS_GETTIMEOFDAY
339
340ecb_inline void
341coro_u2time (pTHX_ UV ret[2])
342{
343 struct timeval tv;
344 gettimeofday (&tv, 0);
345
346 ret [0] = tv.tv_sec;
347 ret [1] = tv.tv_usec;
348}
349
350ecb_inline double
351coro_nvtime (void)
352{
353 struct timeval tv;
354 gettimeofday (&tv, 0);
355
356 return tv.tv_sec + tv.tv_usec * 1e-6;
357}
358
359ecb_inline void
360time_init (pTHX)
361{
362 nvtime = coro_nvtime;
363 u2time = coro_u2time;
364}
365
366#else
367
368ecb_inline void
369time_init (pTHX)
370{
371 SV **svp;
372
373 require_pv ("Time/HiRes.pm");
374
375 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
376
377 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
378 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
379
380 nvtime = INT2PTR (double (*)(), SvIV (*svp));
381
382 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
383 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
384}
385
386#endif
233 387
234/** lowlevel stuff **********************************************************/ 388/** lowlevel stuff **********************************************************/
235 389
236static AV * 390static SV * ecb_noinline
391coro_get_sv (pTHX_ const char *name, int create)
392{
393#if PERL_VERSION_ATLEAST (5,10,0)
394 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
395 get_sv (name, create);
396#endif
397 return get_sv (name, create);
398}
399
400static AV * ecb_noinline
401coro_get_av (pTHX_ const char *name, int create)
402{
403#if PERL_VERSION_ATLEAST (5,10,0)
404 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
405 get_av (name, create);
406#endif
407 return get_av (name, create);
408}
409
410static HV * ecb_noinline
411coro_get_hv (pTHX_ const char *name, int create)
412{
413#if PERL_VERSION_ATLEAST (5,10,0)
414 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
415 get_hv (name, create);
416#endif
417 return get_hv (name, create);
418}
419
420ecb_inline void
421coro_times_update (void)
422{
423#ifdef coro_clock_gettime
424 struct timespec ts;
425
426 ts.tv_sec = ts.tv_nsec = 0;
427 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
428 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
429
430 ts.tv_sec = ts.tv_nsec = 0;
431 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
432 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
433#else
434 dTHX;
435 UV tv[2];
436
437 u2time (aTHX_ tv);
438 time_real [0] = tv [0];
439 time_real [1] = tv [1] * 1000;
440#endif
441}
442
443ecb_inline void
444coro_times_add (struct coro *c)
445{
446 c->t_real [1] += time_real [1];
447 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
448 c->t_real [0] += time_real [0];
449
450 c->t_cpu [1] += time_cpu [1];
451 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
452 c->t_cpu [0] += time_cpu [0];
453}
454
455ecb_inline void
456coro_times_sub (struct coro *c)
457{
458 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
459 c->t_real [1] -= time_real [1];
460 c->t_real [0] -= time_real [0];
461
462 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
463 c->t_cpu [1] -= time_cpu [1];
464 c->t_cpu [0] -= time_cpu [0];
465}
466
467/*****************************************************************************/
468/* magic glue */
469
470#define CORO_MAGIC_type_cv 26
471#define CORO_MAGIC_type_state PERL_MAGIC_ext
472
473#define CORO_MAGIC_NN(sv, type) \
474 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
475 ? SvMAGIC (sv) \
476 : mg_find (sv, type))
477
478#define CORO_MAGIC(sv, type) \
479 (ecb_expect_true (SvMAGIC (sv)) \
480 ? CORO_MAGIC_NN (sv, type) \
481 : 0)
482
483#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
484#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
485
486ecb_inline MAGIC *
487SvSTATEhv_p (pTHX_ SV *coro)
488{
489 MAGIC *mg;
490
491 if (ecb_expect_true (
492 SvTYPE (coro) == SVt_PVHV
493 && (mg = CORO_MAGIC_state (coro))
494 && mg->mg_virtual == &coro_state_vtbl
495 ))
496 return mg;
497
498 return 0;
499}
500
501ecb_inline struct coro *
502SvSTATE_ (pTHX_ SV *coro)
503{
504 MAGIC *mg;
505
506 if (SvROK (coro))
507 coro = SvRV (coro);
508
509 mg = SvSTATEhv_p (aTHX_ coro);
510 if (!mg)
511 croak ("Coro::State object required");
512
513 return (struct coro *)mg->mg_ptr;
514}
515
516#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
517
518/* faster than SvSTATE, but expects a coroutine hv */
519#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
520#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
521
522/*****************************************************************************/
523/* padlist management and caching */
524
525ecb_inline AV *
237coro_clone_padlist (pTHX_ CV *cv) 526coro_derive_padlist (pTHX_ CV *cv)
238{ 527{
239 AV *padlist = CvPADLIST (cv); 528 AV *padlist = CvPADLIST (cv);
240 AV *newpadlist, *newpad; 529 AV *newpadlist, *newpad;
241 530
242 newpadlist = newAV (); 531 newpadlist = newAV ();
243 AvREAL_off (newpadlist); 532 AvREAL_off (newpadlist);
244#if PERL_VERSION_ATLEAST (5,9,0) 533#if PERL_VERSION_ATLEAST (5,10,0)
245 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 534 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
246#else 535#else
247 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 536 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
248#endif 537#endif
249 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 538 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
250 --AvFILLp (padlist); 539 --AvFILLp (padlist);
251 540
252 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 541 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
253 av_store (newpadlist, 1, (SV *)newpad); 542 av_store (newpadlist, 1, (SV *)newpad);
254 543
255 return newpadlist; 544 return newpadlist;
256} 545}
257 546
258static void 547ecb_inline void
259free_padlist (pTHX_ AV *padlist) 548free_padlist (pTHX_ AV *padlist)
260{ 549{
261 /* may be during global destruction */ 550 /* may be during global destruction */
262 if (SvREFCNT (padlist)) 551 if (!IN_DESTRUCT)
263 { 552 {
264 I32 i = AvFILLp (padlist); 553 I32 i = AvFILLp (padlist);
265 while (i >= 0) 554
555 while (i > 0) /* special-case index 0 */
266 { 556 {
267 SV **svp = av_fetch (padlist, i--, FALSE); 557 /* we try to be extra-careful here */
268 if (svp) 558 AV *av = (AV *)AvARRAY (padlist)[i--];
269 { 559 I32 j = AvFILLp (av);
270 SV *sv; 560
271 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 561 while (j >= 0)
562 SvREFCNT_dec (AvARRAY (av)[j--]);
563
564 AvFILLp (av) = -1;
272 SvREFCNT_dec (sv); 565 SvREFCNT_dec (av);
273
274 SvREFCNT_dec (*svp);
275 }
276 } 566 }
277 567
568 SvREFCNT_dec (AvARRAY (padlist)[0]);
569
570 AvFILLp (padlist) = -1;
278 SvREFCNT_dec ((SV*)padlist); 571 SvREFCNT_dec ((SV*)padlist);
279 } 572 }
280} 573}
281 574
282static int 575static int
283coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 576coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
284{ 577{
285 AV *padlist; 578 AV *padlist;
286 AV *av = (AV *)mg->mg_obj; 579 AV *av = (AV *)mg->mg_obj;
580
581 /* perl manages to free our internal AV and _then_ call us */
582 if (IN_DESTRUCT)
583 return 0;
287 584
288 /* casting is fun. */ 585 /* casting is fun. */
289 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 586 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
290 free_padlist (aTHX_ padlist); 587 free_padlist (aTHX_ padlist);
291 588
292 SvREFCNT_dec (av); 589 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
293 590
294 return 0; 591 return 0;
295} 592}
296 593
297#define PERL_MAGIC_coro PERL_MAGIC_ext 594static MGVTBL coro_cv_vtbl = {
298 595 0, 0, 0, 0,
299static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 596 coro_cv_free
300 597};
301#define CORO_MAGIC(cv) \
302 SvMAGIC (cv) \
303 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
304 ? SvMAGIC (cv) \
305 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
306 : 0
307
308static struct coro *
309SvSTATE_ (pTHX_ SV *coro)
310{
311 HV *stash;
312 MAGIC *mg;
313
314 if (SvROK (coro))
315 coro = SvRV (coro);
316
317 if (SvTYPE (coro) != SVt_PVHV)
318 croak ("Coro::State object required");
319
320 stash = SvSTASH (coro);
321 if (stash != coro_stash && stash != coro_state_stash)
322 {
323 /* very slow, but rare, check */
324 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
325 croak ("Coro::State object required");
326 }
327
328 mg = CORO_MAGIC (coro);
329 return (struct coro *)mg->mg_ptr;
330}
331
332#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
333 598
334/* the next two functions merely cache the padlists */ 599/* the next two functions merely cache the padlists */
335static void 600ecb_inline void
336get_padlist (pTHX_ CV *cv) 601get_padlist (pTHX_ CV *cv)
337{ 602{
338 MAGIC *mg = CORO_MAGIC (cv); 603 MAGIC *mg = CORO_MAGIC_cv (cv);
339 AV *av; 604 AV *av;
340 605
341 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 606 if (ecb_expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
342 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 607 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
343 else 608 else
344 { 609 {
345#if CORO_PREFER_PERL_FUNCTIONS 610#if CORO_PREFER_PERL_FUNCTIONS
346 /* this is probably cleaner, but also slower? */ 611 /* this is probably cleaner? but also slower! */
612 /* in practise, it seems to be less stable */
347 CV *cp = Perl_cv_clone (cv); 613 CV *cp = Perl_cv_clone (aTHX_ cv);
348 CvPADLIST (cv) = CvPADLIST (cp); 614 CvPADLIST (cv) = CvPADLIST (cp);
349 CvPADLIST (cp) = 0; 615 CvPADLIST (cp) = 0;
350 SvREFCNT_dec (cp); 616 SvREFCNT_dec (cp);
351#else 617#else
352 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 618 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
353#endif 619#endif
354 } 620 }
355} 621}
356 622
357static void 623ecb_inline void
358put_padlist (pTHX_ CV *cv) 624put_padlist (pTHX_ CV *cv)
359{ 625{
360 MAGIC *mg = CORO_MAGIC (cv); 626 MAGIC *mg = CORO_MAGIC_cv (cv);
361 AV *av; 627 AV *av;
362 628
363 if (!mg) 629 if (ecb_expect_false (!mg))
364 { 630 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
365 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
366 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
367 mg->mg_virtual = &vtbl_coro;
368 mg->mg_obj = (SV *)newAV ();
369 }
370 631
371 av = (AV *)mg->mg_obj; 632 av = (AV *)mg->mg_obj;
372 633
373 if (AvFILLp (av) >= AvMAX (av)) 634 if (ecb_expect_false (AvFILLp (av) >= AvMAX (av)))
374 av_extend (av, AvMAX (av) + 1); 635 av_extend (av, AvFILLp (av) + 1);
375 636
376 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 637 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
377} 638}
378 639
379/** load & save, init *******************************************************/ 640/** load & save, init *******************************************************/
380 641
642/* swap sv heads, at least logically */
643static void
644swap_svs (pTHX_ Coro__State c)
645{
646 int i;
647
648 for (i = 0; i <= AvFILLp (c->swap_sv); )
649 {
650 SV *a = AvARRAY (c->swap_sv)[i++];
651 SV *b = AvARRAY (c->swap_sv)[i++];
652
653 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
654 SV tmp;
655
656 /* swap sv_any */
657 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
658
659 /* swap sv_flags */
660 SvFLAGS (&tmp) = SvFLAGS (a);
661 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
662 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
663
664#if PERL_VERSION_ATLEAST (5,10,0)
665 /* perl 5.10 complicates this _quite_ a bit, but it also is
666 * much faster, so no quarrels here. alternatively, we could
667 * sv_upgrade to avoid this.
668 */
669 {
670 /* swap sv_u */
671 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
672
673 /* if SvANY points to the head, we need to adjust the pointers,
674 * as the pointer for a still points to b, and maybe vice versa.
675 */
676 #define svany_in_head(type) \
677 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
678
679 if (svany_in_head (SvTYPE (a)))
680 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
681
682 if (svany_in_head (SvTYPE (b)))
683 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
684 }
685#endif
686 }
687}
688
689#define SWAP_SVS(coro) \
690 if (ecb_expect_false ((coro)->swap_sv)) \
691 swap_svs (aTHX_ (coro))
692
693static void
694on_enterleave_call (pTHX_ SV *cb);
695
381static void 696static void
382load_perl (pTHX_ Coro__State c) 697load_perl (pTHX_ Coro__State c)
383{ 698{
384#define VAR(name,type) PL_ ## name = c->name; 699 perl_slots *slot = c->slot;
700 c->slot = 0;
701
702 PL_mainstack = c->mainstack;
703
704#if CORO_JIT
705 load_perl_slots (slot);
706#else
707 #define VARx(name,expr,type) expr = slot->name;
385# include "state.h" 708 # include "state.h"
386#undef VAR 709 #undef VARx
387 710#endif
388 GvSV (PL_defgv) = c->defsv;
389 GvAV (PL_defgv) = c->defav;
390 GvSV (PL_errgv) = c->errsv;
391 GvIOp(PL_defoutgv) = c->deffh;
392 PL_rs = c->irssv;
393 GvSV (irsgv) = c->irssv_sv;
394 711
395 { 712 {
396 dSP; 713 dSP;
714
397 CV *cv; 715 CV *cv;
398 716
399 /* now do the ugly restore mess */ 717 /* now do the ugly restore mess */
400 while ((cv = (CV *)POPs)) 718 while (ecb_expect_true (cv = (CV *)POPs))
401 { 719 {
402 put_padlist (aTHX_ cv); /* mark this padlist as available */ 720 put_padlist (aTHX_ cv); /* mark this padlist as available */
403 CvDEPTH (cv) = PTR2IV (POPs); 721 CvDEPTH (cv) = PTR2IV (POPs);
404 CvPADLIST (cv) = (AV *)POPs; 722 CvPADLIST (cv) = (AV *)POPs;
405 } 723 }
406 724
407 PUTBACK; 725 PUTBACK;
408 } 726 }
727
728 slf_frame = c->slf_frame;
729 CORO_THROW = c->except;
730
731 if (ecb_expect_false (enable_times))
732 {
733 if (ecb_expect_false (!times_valid))
734 coro_times_update ();
735
736 coro_times_sub (c);
737 }
738
739 if (ecb_expect_false (c->on_enter))
740 {
741 int i;
742
743 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
744 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
745 }
746
747 SWAP_SVS (c);
409} 748}
410 749
411static void 750static void
412save_perl (pTHX_ Coro__State c) 751save_perl (pTHX_ Coro__State c)
413{ 752{
753 SWAP_SVS (c);
754
755 if (ecb_expect_false (c->on_leave))
756 {
757 int i;
758
759 for (i = AvFILLp (c->on_leave); i >= 0; --i)
760 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
761 }
762
763 times_valid = 0;
764
765 if (ecb_expect_false (enable_times))
766 {
767 coro_times_update (); times_valid = 1;
768 coro_times_add (c);
769 }
770
771 c->except = CORO_THROW;
772 c->slf_frame = slf_frame;
773
414 { 774 {
415 dSP; 775 dSP;
416 I32 cxix = cxstack_ix; 776 I32 cxix = cxstack_ix;
417 PERL_CONTEXT *ccstk = cxstack; 777 PERL_CONTEXT *ccstk = cxstack;
418 PERL_SI *top_si = PL_curstackinfo; 778 PERL_SI *top_si = PL_curstackinfo;
… …
424 784
425 XPUSHs (Nullsv); 785 XPUSHs (Nullsv);
426 /* this loop was inspired by pp_caller */ 786 /* this loop was inspired by pp_caller */
427 for (;;) 787 for (;;)
428 { 788 {
429 while (cxix >= 0) 789 while (ecb_expect_true (cxix >= 0))
430 { 790 {
431 PERL_CONTEXT *cx = &ccstk[cxix--]; 791 PERL_CONTEXT *cx = &ccstk[cxix--];
432 792
433 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT) 793 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
434 { 794 {
435 CV *cv = cx->blk_sub.cv; 795 CV *cv = cx->blk_sub.cv;
436 796
437 if (CvDEPTH (cv)) 797 if (ecb_expect_true (CvDEPTH (cv)))
438 { 798 {
439 EXTEND (SP, 3); 799 EXTEND (SP, 3);
440 PUSHs ((SV *)CvPADLIST (cv)); 800 PUSHs ((SV *)CvPADLIST (cv));
441 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 801 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
442 PUSHs ((SV *)cv); 802 PUSHs ((SV *)cv);
443 803
444 CvDEPTH (cv) = 0; 804 CvDEPTH (cv) = 0;
445 get_padlist (aTHX_ cv); 805 get_padlist (aTHX_ cv);
446 } 806 }
447 } 807 }
448 } 808 }
449 809
450 if (top_si->si_type == PERLSI_MAIN) 810 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
451 break; 811 break;
452 812
453 top_si = top_si->si_prev; 813 top_si = top_si->si_prev;
454 ccstk = top_si->si_cxstack; 814 ccstk = top_si->si_cxstack;
455 cxix = top_si->si_cxix; 815 cxix = top_si->si_cxix;
456 } 816 }
457 817
458 PUTBACK; 818 PUTBACK;
459 } 819 }
460 820
461 c->defav = GvAV (PL_defgv); 821 /* allocate some space on the context stack for our purposes */
462 c->defsv = DEFSV; 822 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
463 c->errsv = ERRSV; 823 {
464 c->deffh = GvIOp (PL_defoutgv); 824 unsigned int i;
465 c->irssv = PL_rs;
466 c->irssv_sv = GvSV (irsgv);
467 825
468#define VAR(name,type)c->name = PL_ ## name; 826 for (i = 0; i < SLOT_COUNT; ++i)
827 CXINC;
828
829 cxstack_ix -= SLOT_COUNT; /* undo allocation */
830 }
831
832 c->mainstack = PL_mainstack;
833
834 {
835 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
836
837#if CORO_JIT
838 save_perl_slots (slot);
839#else
840 #define VARx(name,expr,type) slot->name = expr;
469# include "state.h" 841 # include "state.h"
470#undef VAR 842 #undef VARx
843#endif
844 }
471} 845}
472 846
473/* 847/*
474 * allocate various perl stacks. This is an exact copy 848 * allocate various perl stacks. This is almost an exact copy
475 * of perl.c:init_stacks, except that it uses less memory 849 * of perl.c:init_stacks, except that it uses less memory
476 * on the (sometimes correct) assumption that coroutines do 850 * on the (sometimes correct) assumption that coroutines do
477 * not usually need a lot of stackspace. 851 * not usually need a lot of stackspace.
478 */ 852 */
479#if CORO_PREFER_PERL_FUNCTIONS 853#if CORO_PREFER_PERL_FUNCTIONS
480# define coro_init_stacks init_stacks 854# define coro_init_stacks(thx) init_stacks ()
481#else 855#else
482static void 856static void
483coro_init_stacks (pTHX) 857coro_init_stacks (pTHX)
484{ 858{
485 PL_curstackinfo = new_stackinfo(64, 6); 859 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
486 PL_curstackinfo->si_type = PERLSI_MAIN; 860 PL_curstackinfo->si_type = PERLSI_MAIN;
487 PL_curstack = PL_curstackinfo->si_stack; 861 PL_curstack = PL_curstackinfo->si_stack;
488 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 862 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
489 863
490 PL_stack_base = AvARRAY(PL_curstack); 864 PL_stack_base = AvARRAY(PL_curstack);
491 PL_stack_sp = PL_stack_base; 865 PL_stack_sp = PL_stack_base;
492 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 866 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
493 867
494 New(50,PL_tmps_stack,64,SV*); 868 New(50,PL_tmps_stack,32,SV*);
495 PL_tmps_floor = -1; 869 PL_tmps_floor = -1;
496 PL_tmps_ix = -1; 870 PL_tmps_ix = -1;
497 PL_tmps_max = 64; 871 PL_tmps_max = 32;
498 872
499 New(54,PL_markstack,16,I32); 873 New(54,PL_markstack,16,I32);
500 PL_markstack_ptr = PL_markstack; 874 PL_markstack_ptr = PL_markstack;
501 PL_markstack_max = PL_markstack + 16; 875 PL_markstack_max = PL_markstack + 16;
502 876
503#ifdef SET_MARK_OFFSET 877#ifdef SET_MARK_OFFSET
504 SET_MARK_OFFSET; 878 SET_MARK_OFFSET;
505#endif 879#endif
506 880
507 New(54,PL_scopestack,16,I32); 881 New(54,PL_scopestack,8,I32);
508 PL_scopestack_ix = 0; 882 PL_scopestack_ix = 0;
509 PL_scopestack_max = 16; 883 PL_scopestack_max = 8;
510 884
511 New(54,PL_savestack,64,ANY); 885 New(54,PL_savestack,24,ANY);
512 PL_savestack_ix = 0; 886 PL_savestack_ix = 0;
513 PL_savestack_max = 64; 887 PL_savestack_max = 24;
514 888
515#if !PERL_VERSION_ATLEAST (5,9,0) 889#if !PERL_VERSION_ATLEAST (5,10,0)
516 New(54,PL_retstack,4,OP*); 890 New(54,PL_retstack,4,OP*);
517 PL_retstack_ix = 0; 891 PL_retstack_ix = 0;
518 PL_retstack_max = 4; 892 PL_retstack_max = 4;
519#endif 893#endif
520} 894}
… …
522 896
523/* 897/*
524 * destroy the stacks, the callchain etc... 898 * destroy the stacks, the callchain etc...
525 */ 899 */
526static void 900static void
527coro_destroy_stacks (pTHX) 901coro_destruct_stacks (pTHX)
528{ 902{
529 while (PL_curstackinfo->si_next) 903 while (PL_curstackinfo->si_next)
530 PL_curstackinfo = PL_curstackinfo->si_next; 904 PL_curstackinfo = PL_curstackinfo->si_next;
531 905
532 while (PL_curstackinfo) 906 while (PL_curstackinfo)
… …
543 917
544 Safefree (PL_tmps_stack); 918 Safefree (PL_tmps_stack);
545 Safefree (PL_markstack); 919 Safefree (PL_markstack);
546 Safefree (PL_scopestack); 920 Safefree (PL_scopestack);
547 Safefree (PL_savestack); 921 Safefree (PL_savestack);
548#if !PERL_VERSION_ATLEAST (5,9,0) 922#if !PERL_VERSION_ATLEAST (5,10,0)
549 Safefree (PL_retstack); 923 Safefree (PL_retstack);
550#endif 924#endif
551} 925}
552 926
927#define CORO_RSS \
928 rss += sizeof (SYM (curstackinfo)); \
929 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
930 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
931 rss += SYM (tmps_max) * sizeof (SV *); \
932 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
933 rss += SYM (scopestack_max) * sizeof (I32); \
934 rss += SYM (savestack_max) * sizeof (ANY);
935
553static size_t 936static size_t
554coro_rss (pTHX_ struct coro *coro) 937coro_rss (pTHX_ struct coro *coro)
555{ 938{
556 size_t rss = sizeof (coro); 939 size_t rss = sizeof (*coro);
557 940
558 if (coro->mainstack) 941 if (coro->mainstack)
559 { 942 {
560 if (coro->flags & CF_RUNNING) 943 if (coro->flags & CF_RUNNING)
561 { 944 {
562 #define VAR(name,type)coro->name = PL_ ## name; 945 #define SYM(sym) PL_ ## sym
563 # include "state.h" 946 CORO_RSS;
564 #undef VAR 947 #undef SYM
565 } 948 }
949 else
950 {
951 #define SYM(sym) coro->slot->sym
952 CORO_RSS;
953 #undef SYM
954 }
955 }
566 956
567 rss += sizeof (coro->curstackinfo); 957 return rss;
568 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *); 958}
569 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
570 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
571 rss += coro->tmps_max * sizeof (SV *);
572 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
573 rss += coro->scopestack_max * sizeof (I32);
574 rss += coro->savestack_max * sizeof (ANY);
575 959
576#if !PERL_VERSION_ATLEAST (5,9,0) 960/** coroutine stack handling ************************************************/
577 rss += coro->retstack_max * sizeof (OP *); 961
962static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
963static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
964static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
965
966/* apparently < 5.8.8 */
967#ifndef MgPV_nolen_const
968#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
969 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
970 (const char*)(mg)->mg_ptr)
578#endif 971#endif
972
973/*
974 * This overrides the default magic get method of %SIG elements.
975 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
976 * and instead of trying to save and restore the hash elements (extremely slow),
977 * we just provide our own readback here.
978 */
979static int ecb_cold
980coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
981{
982 const char *s = MgPV_nolen_const (mg);
983
984 if (*s == '_')
579 } 985 {
986 SV **svp = 0;
580 987
988 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
989 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
990
991 if (svp)
992 {
993 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
994 return 0;
995 }
996 }
997
998 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
999}
1000
1001static int ecb_cold
1002coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1003{
1004 const char *s = MgPV_nolen_const (mg);
1005
1006 if (*s == '_')
1007 {
1008 SV **svp = 0;
1009
1010 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1011 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1012
1013 if (svp)
1014 {
1015 SV *old = *svp;
1016 *svp = 0;
1017 SvREFCNT_dec (old);
1018 return 0;
1019 }
1020 }
1021
1022 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1023}
1024
1025static int ecb_cold
1026coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1027{
1028 const char *s = MgPV_nolen_const (mg);
1029
1030 if (*s == '_')
1031 {
1032 SV **svp = 0;
1033
1034 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1035 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1036
1037 if (svp)
1038 {
1039 SV *old = *svp;
1040 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1041 SvREFCNT_dec (old);
1042 return 0;
1043 }
1044 }
1045
1046 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1047}
1048
1049static void
1050prepare_nop (pTHX_ struct coro_transfer_args *ta)
1051{
1052 /* kind of mega-hacky, but works */
1053 ta->next = ta->prev = (struct coro *)ta;
1054}
1055
1056static int
1057slf_check_nop (pTHX_ struct CoroSLF *frame)
1058{
581 return rss; 1059 return 0;
582} 1060}
583 1061
584/** coroutine stack handling ************************************************/
585
586static void 1062static int
1063slf_check_repeat (pTHX_ struct CoroSLF *frame)
1064{
1065 return 1;
1066}
1067
1068static UNOP init_perl_op;
1069
1070ecb_noinline static void /* noinline to keep it out of the transfer fast path */
587coro_setup (pTHX_ struct coro *coro) 1071init_perl (pTHX_ struct coro *coro)
588{ 1072{
589 /* 1073 /*
590 * emulate part of the perl startup here. 1074 * emulate part of the perl startup here.
591 */ 1075 */
592 coro_init_stacks (aTHX); 1076 coro_init_stacks (aTHX);
593 1077
594 PL_runops = RUNOPS_DEFAULT; 1078 PL_runops = RUNOPS_DEFAULT;
595 PL_curcop = &PL_compiling; 1079 PL_curcop = &PL_compiling;
596 PL_in_eval = EVAL_NULL; 1080 PL_in_eval = EVAL_NULL;
597 PL_comppad = 0; 1081 PL_comppad = 0;
1082 PL_comppad_name = 0;
1083 PL_comppad_name_fill = 0;
1084 PL_comppad_name_floor = 0;
598 PL_curpm = 0; 1085 PL_curpm = 0;
1086 PL_curpad = 0;
599 PL_localizing = 0; 1087 PL_localizing = 0;
600 PL_dirty = 0;
601 PL_restartop = 0; 1088 PL_restartop = 0;
1089#if PERL_VERSION_ATLEAST (5,10,0)
1090 PL_parser = 0;
1091#endif
1092 PL_hints = 0;
1093
1094 /* recreate the die/warn hooks */
1095 PL_diehook = SvREFCNT_inc (rv_diehook);
1096 PL_warnhook = SvREFCNT_inc (rv_warnhook);
602 1097
603 GvSV (PL_defgv) = NEWSV (0, 0); 1098 GvSV (PL_defgv) = newSV (0);
604 GvAV (PL_defgv) = coro->args; coro->args = 0; 1099 GvAV (PL_defgv) = coro->args; coro->args = 0;
605 GvSV (PL_errgv) = NEWSV (0, 0); 1100 GvSV (PL_errgv) = newSV (0);
606 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), irsgv, PERL_MAGIC_sv, "/", 1); 1101 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1102 GvHV (PL_hintgv) = 0;
607 PL_rs = newSVsv (GvSV (irsgv)); 1103 PL_rs = newSVsv (GvSV (irsgv));
608 1104 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
609 {
610 IO *io = newIO ();
611 GvIOp(PL_defoutgv) = io;
612 IoTYPE (io) = IoTYPE_WRONLY;
613 IoOFP (io) = IoIFP (io) = PerlIO_stdout ();
614 IoFLAGS (io) |= IOf_FLUSH;
615 }
616 1105
617 { 1106 {
618 dSP; 1107 dSP;
619 LOGOP myop; 1108 UNOP myop;
620 1109
621 Zero (&myop, 1, LOGOP); 1110 Zero (&myop, 1, UNOP);
622 myop.op_next = Nullop; 1111 myop.op_next = Nullop;
1112 myop.op_type = OP_ENTERSUB;
623 myop.op_flags = OPf_WANT_VOID; 1113 myop.op_flags = OPf_WANT_VOID;
624 1114
625 PUSHMARK (SP); 1115 PUSHMARK (SP);
626 XPUSHs (av_shift (GvAV (PL_defgv))); 1116 PUSHs ((SV *)coro->startcv);
627 PUTBACK; 1117 PUTBACK;
628 PL_op = (OP *)&myop; 1118 PL_op = (OP *)&myop;
629 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1119 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
630 SPAGAIN;
631 } 1120 }
632 1121
633 ENTER; /* necessary e.g. for dounwind */ 1122 /* this newly created coroutine might be run on an existing cctx which most
634} 1123 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1124 */
1125 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1126 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1127 slf_frame.destroy = 0;
635 1128
1129 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1130 init_perl_op.op_next = PL_op;
1131 init_perl_op.op_type = OP_ENTERSUB;
1132 init_perl_op.op_ppaddr = pp_slf;
1133 /* no flags etc. required, as an init function won't be called */
1134
1135 PL_op = (OP *)&init_perl_op;
1136
1137 /* copy throw, in case it was set before init_perl */
1138 CORO_THROW = coro->except;
1139
1140 SWAP_SVS (coro);
1141
1142 if (ecb_expect_false (enable_times))
1143 {
1144 coro_times_update ();
1145 coro_times_sub (coro);
1146 }
1147}
1148
636static void 1149static void
637coro_destroy (pTHX_ struct coro *coro) 1150coro_unwind_stacks (pTHX)
638{ 1151{
639 if (!IN_DESTRUCT) 1152 if (!IN_DESTRUCT)
640 { 1153 {
641 /* restore all saved variables and stuff */ 1154 /* restore all saved variables and stuff */
642 LEAVE_SCOPE (0); 1155 LEAVE_SCOPE (0);
… …
650 POPSTACK_TO (PL_mainstack); 1163 POPSTACK_TO (PL_mainstack);
651 1164
652 /* unwind main stack */ 1165 /* unwind main stack */
653 dounwind (-1); 1166 dounwind (-1);
654 } 1167 }
1168}
655 1169
656 SvREFCNT_dec (GvSV (PL_defgv)); 1170static void
657 SvREFCNT_dec (GvAV (PL_defgv)); 1171destroy_perl (pTHX_ struct coro *coro)
658 SvREFCNT_dec (GvSV (PL_errgv)); 1172{
659 SvREFCNT_dec (GvIOp(PL_defoutgv)); 1173 SV *svf [9];
660 SvREFCNT_dec (PL_rs);
661 SvREFCNT_dec (GvSV (irsgv));
662 1174
1175 {
1176 SV *old_current = SvRV (coro_current);
1177 struct coro *current = SvSTATE (old_current);
1178
1179 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1180
1181 save_perl (aTHX_ current);
1182
1183 /* this will cause transfer_check to croak on block*/
1184 SvRV_set (coro_current, (SV *)coro->hv);
1185
1186 load_perl (aTHX_ coro);
1187
1188 coro_unwind_stacks (aTHX);
1189
1190 /* restore swapped sv's */
1191 SWAP_SVS (coro);
1192
663 coro_destroy_stacks (aTHX); 1193 coro_destruct_stacks (aTHX);
664}
665 1194
666static void 1195 /* now save some sv's to be free'd later */
1196 svf [0] = GvSV (PL_defgv);
1197 svf [1] = (SV *)GvAV (PL_defgv);
1198 svf [2] = GvSV (PL_errgv);
1199 svf [3] = (SV *)PL_defoutgv;
1200 svf [4] = PL_rs;
1201 svf [5] = GvSV (irsgv);
1202 svf [6] = (SV *)GvHV (PL_hintgv);
1203 svf [7] = PL_diehook;
1204 svf [8] = PL_warnhook;
1205 assert (9 == sizeof (svf) / sizeof (*svf));
1206
1207 SvRV_set (coro_current, old_current);
1208
1209 load_perl (aTHX_ current);
1210 }
1211
1212 {
1213 unsigned int i;
1214
1215 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1216 SvREFCNT_dec (svf [i]);
1217
1218 SvREFCNT_dec (coro->saved_deffh);
1219 SvREFCNT_dec (coro->rouse_cb);
1220 SvREFCNT_dec (coro->invoke_cb);
1221 SvREFCNT_dec (coro->invoke_av);
1222 }
1223}
1224
1225ecb_inline void
667free_coro_mortal (pTHX) 1226free_coro_mortal (pTHX)
668{ 1227{
669 if (coro_mortal) 1228 if (ecb_expect_true (coro_mortal))
670 { 1229 {
671 SvREFCNT_dec (coro_mortal); 1230 SvREFCNT_dec ((SV *)coro_mortal);
672 coro_mortal = 0; 1231 coro_mortal = 0;
673 } 1232 }
674} 1233}
675 1234
676static int 1235static int
677runops_trace (pTHX) 1236runops_trace (pTHX)
678{ 1237{
679 COP *oldcop = 0; 1238 COP *oldcop = 0;
680 int oldcxix = -2; 1239 int oldcxix = -2;
681 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
682 coro_cctx *cctx = coro->cctx;
683 1240
684 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1241 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
685 { 1242 {
686 PERL_ASYNC_CHECK (); 1243 PERL_ASYNC_CHECK ();
687 1244
688 if (cctx->flags & CC_TRACE_ALL) 1245 if (cctx_current->flags & CC_TRACE_ALL)
689 { 1246 {
690 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1247 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
691 { 1248 {
692 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1249 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
693 SV **bot, **top; 1250 SV **bot, **top;
694 AV *av = newAV (); /* return values */ 1251 AV *av = newAV (); /* return values */
695 SV **cb; 1252 SV **cb;
… …
703 bot = PL_stack_base + cx->blk_oldsp + 1; 1260 bot = PL_stack_base + cx->blk_oldsp + 1;
704 top = cx->blk_gimme == G_ARRAY ? SP + 1 1261 top = cx->blk_gimme == G_ARRAY ? SP + 1
705 : cx->blk_gimme == G_SCALAR ? bot + 1 1262 : cx->blk_gimme == G_SCALAR ? bot + 1
706 : bot; 1263 : bot;
707 1264
1265 av_extend (av, top - bot);
708 while (bot < top) 1266 while (bot < top)
709 av_push (av, SvREFCNT_inc (*bot++)); 1267 av_push (av, SvREFCNT_inc_NN (*bot++));
710 1268
711 PL_runops = RUNOPS_DEFAULT; 1269 PL_runops = RUNOPS_DEFAULT;
712 ENTER; 1270 ENTER;
713 SAVETMPS; 1271 SAVETMPS;
714 EXTEND (SP, 3); 1272 EXTEND (SP, 3);
… …
731 1289
732 if (PL_curcop != &PL_compiling) 1290 if (PL_curcop != &PL_compiling)
733 { 1291 {
734 SV **cb; 1292 SV **cb;
735 1293
736 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1294 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
737 { 1295 {
738 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1296 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
739 1297
740 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1298 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
741 { 1299 {
742 runops_proc_t old_runops = PL_runops;
743 dSP; 1300 dSP;
744 GV *gv = CvGV (cx->blk_sub.cv); 1301 GV *gv = CvGV (cx->blk_sub.cv);
745 SV *fullname = sv_2mortal (newSV (0)); 1302 SV *fullname = sv_2mortal (newSV (0));
746 1303
747 if (isGV (gv)) 1304 if (isGV (gv))
… …
752 SAVETMPS; 1309 SAVETMPS;
753 EXTEND (SP, 3); 1310 EXTEND (SP, 3);
754 PUSHMARK (SP); 1311 PUSHMARK (SP);
755 PUSHs (&PL_sv_yes); 1312 PUSHs (&PL_sv_yes);
756 PUSHs (fullname); 1313 PUSHs (fullname);
757 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1314 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
758 PUTBACK; 1315 PUTBACK;
759 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1316 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
760 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1317 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
761 SPAGAIN; 1318 SPAGAIN;
762 FREETMPS; 1319 FREETMPS;
… …
765 } 1322 }
766 1323
767 oldcxix = cxstack_ix; 1324 oldcxix = cxstack_ix;
768 } 1325 }
769 1326
770 if (cctx->flags & CC_TRACE_LINE) 1327 if (cctx_current->flags & CC_TRACE_LINE)
771 { 1328 {
772 dSP; 1329 dSP;
773 1330
774 PL_runops = RUNOPS_DEFAULT; 1331 PL_runops = RUNOPS_DEFAULT;
775 ENTER; 1332 ENTER;
… …
794 1351
795 TAINT_NOT; 1352 TAINT_NOT;
796 return 0; 1353 return 0;
797} 1354}
798 1355
799/* inject a fake call to Coro::State::_cctx_init into the execution */ 1356static struct CoroSLF cctx_ssl_frame;
800/* _cctx_init should be careful, as it could be called at almost any time */
801/* during execution of a perl program */
802static void NOINLINE
803prepare_cctx (pTHX_ coro_cctx *cctx)
804{
805 dSP;
806 LOGOP myop;
807 1357
1358static void
1359slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1360{
1361 ta->prev = 0;
1362}
1363
1364static int
1365slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1366{
1367 *frame = cctx_ssl_frame;
1368
1369 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1370}
1371
1372/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1373static void ecb_noinline
1374cctx_prepare (pTHX)
1375{
808 PL_top_env = &PL_start_env; 1376 PL_top_env = &PL_start_env;
809 1377
810 if (cctx->flags & CC_TRACE) 1378 if (cctx_current->flags & CC_TRACE)
811 PL_runops = runops_trace; 1379 PL_runops = runops_trace;
812 1380
813 Zero (&myop, 1, LOGOP); 1381 /* we already must be executing an SLF op, there is no other valid way
814 myop.op_next = PL_op; 1382 * that can lead to creation of a new cctx */
815 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1383 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1384 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
816 1385
817 PUSHMARK (SP); 1386 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
818 EXTEND (SP, 2); 1387 cctx_ssl_frame = slf_frame;
819 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1388
820 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1389 slf_frame.prepare = slf_prepare_set_stacklevel;
821 PUTBACK; 1390 slf_frame.check = slf_check_set_stacklevel;
822 PL_op = (OP *)&myop; 1391}
823 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1392
824 SPAGAIN; 1393/* the tail of transfer: execute stuff we can only do after a transfer */
1394ecb_inline void
1395transfer_tail (pTHX)
1396{
1397 free_coro_mortal (aTHX);
825} 1398}
826 1399
827/* 1400/*
828 * this is a _very_ stripped down perl interpreter ;) 1401 * this is a _very_ stripped down perl interpreter ;)
829 */ 1402 */
830static void 1403static void
831coro_run (void *arg) 1404cctx_run (void *arg)
832{ 1405{
1406#ifdef USE_ITHREADS
1407# if CORO_PTHREAD
1408 PERL_SET_CONTEXT (coro_thx);
1409# endif
1410#endif
1411 {
833 dTHX; 1412 dTHX;
834 1413
835 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1414 /* normally we would need to skip the entersub here */
836 UNLOCK; 1415 /* not doing so will re-execute it, which is exactly what we want */
837
838 /* we now skip the entersub that lead to transfer() */
839 PL_op = PL_op->op_next; 1416 /* PL_nop = PL_nop->op_next */
840 1417
841 /* inject a fake subroutine call to cctx_init */ 1418 /* inject a fake subroutine call to cctx_init */
842 prepare_cctx (aTHX_ (coro_cctx *)arg); 1419 cctx_prepare (aTHX);
843 1420
1421 /* cctx_run is the alternative tail of transfer() */
1422 transfer_tail (aTHX);
1423
844 /* somebody or something will hit me for both perl_run and PL_restartop */ 1424 /* somebody or something will hit me for both perl_run and PL_restartop */
845 PL_restartop = PL_op; 1425 PL_restartop = PL_op;
846 perl_run (PL_curinterp); 1426 perl_run (PL_curinterp);
847
848 /* 1427 /*
1428 * Unfortunately, there is no way to get at the return values of the
1429 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1430 * runtime errors here, as this is just a random interpreter, not a thread.
1431 */
1432
1433 /*
849 * If perl-run returns we assume exit() was being called or the coro 1434 * If perl-run returns we assume exit() was being called or the coro
850 * fell off the end, which seems to be the only valid (non-bug) 1435 * fell off the end, which seems to be the only valid (non-bug)
851 * reason for perl_run to return. We try to exit by jumping to the 1436 * reason for perl_run to return. We try to exit by jumping to the
852 * bootstrap-time "top" top_env, as we cannot restore the "main" 1437 * bootstrap-time "top" top_env, as we cannot restore the "main"
853 * coroutine as Coro has no such concept 1438 * coroutine as Coro has no such concept.
1439 * This actually isn't valid with the pthread backend, but OSes requiring
1440 * that backend are too broken to do it in a standards-compliant way.
854 */ 1441 */
855 PL_top_env = main_top_env; 1442 PL_top_env = main_top_env;
856 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1443 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1444 }
857} 1445}
858 1446
859static coro_cctx * 1447static coro_cctx *
860cctx_new () 1448cctx_new (void)
861{ 1449{
862 coro_cctx *cctx; 1450 coro_cctx *cctx;
1451
1452 ++cctx_count;
1453 New (0, cctx, 1, coro_cctx);
1454
1455 cctx->gen = cctx_gen;
1456 cctx->flags = 0;
1457 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1458
1459 return cctx;
1460}
1461
1462/* create a new cctx only suitable as source */
1463static coro_cctx *
1464cctx_new_empty (void)
1465{
1466 coro_cctx *cctx = cctx_new ();
1467
1468 cctx->sptr = 0;
1469 coro_create (&cctx->cctx, 0, 0, 0, 0);
1470
1471 return cctx;
1472}
1473
1474/* create a new cctx suitable as destination/running a perl interpreter */
1475static coro_cctx *
1476cctx_new_run (void)
1477{
1478 coro_cctx *cctx = cctx_new ();
863 void *stack_start; 1479 void *stack_start;
864 size_t stack_size; 1480 size_t stack_size;
865 1481
866 ++cctx_count;
867
868 Newz (0, cctx, 1, coro_cctx);
869
870#if HAVE_MMAP 1482#if HAVE_MMAP
871
872 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1483 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
873 /* mmap supposedly does allocate-on-write for us */ 1484 /* mmap supposedly does allocate-on-write for us */
874 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1485 cctx->sptr = mmap (0, cctx->ssize, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_ANONYMOUS, 0, 0);
875 1486
876 if (cctx->sptr != (void *)-1) 1487 if (cctx->sptr != (void *)-1)
877 { 1488 {
878# if CORO_STACKGUARD 1489 #if CORO_STACKGUARD
879 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1490 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
880# endif 1491 #endif
881 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1492 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
882 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1493 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
883 cctx->flags |= CC_MAPPED; 1494 cctx->flags |= CC_MAPPED;
884 } 1495 }
885 else 1496 else
886#endif 1497#endif
887 { 1498 {
888 cctx->ssize = coro_stacksize * (long)sizeof (long); 1499 cctx->ssize = cctx_stacksize * (long)sizeof (long);
889 New (0, cctx->sptr, coro_stacksize, long); 1500 New (0, cctx->sptr, cctx_stacksize, long);
890 1501
891 if (!cctx->sptr) 1502 if (!cctx->sptr)
892 { 1503 {
893 perror ("FATAL: unable to allocate stack for coroutine"); 1504 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
894 _exit (EXIT_FAILURE); 1505 _exit (EXIT_FAILURE);
895 } 1506 }
896 1507
897 stack_start = cctx->sptr; 1508 stack_start = cctx->sptr;
898 stack_size = cctx->ssize; 1509 stack_size = cctx->ssize;
899 } 1510 }
900 1511
901 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1512 #if CORO_USE_VALGRIND
1513 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1514 #endif
1515
902 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1516 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
903 1517
904 return cctx; 1518 return cctx;
905} 1519}
906 1520
907static void 1521static void
908cctx_destroy (coro_cctx *cctx) 1522cctx_destroy (coro_cctx *cctx)
909{ 1523{
910 if (!cctx) 1524 if (!cctx)
911 return; 1525 return;
912 1526
1527 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1528
913 --cctx_count; 1529 --cctx_count;
1530 coro_destroy (&cctx->cctx);
914 1531
1532 /* coro_transfer creates new, empty cctx's */
1533 if (cctx->sptr)
1534 {
915#if CORO_USE_VALGRIND 1535 #if CORO_USE_VALGRIND
916 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1536 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1537 #endif
1538
1539#if HAVE_MMAP
1540 if (cctx->flags & CC_MAPPED)
1541 munmap (cctx->sptr, cctx->ssize);
1542 else
917#endif 1543#endif
918
919#if HAVE_MMAP
920 if (cctx->flags & CC_MAPPED)
921 munmap (cctx->sptr, cctx->ssize);
922 else
923#endif
924 Safefree (cctx->sptr); 1544 Safefree (cctx->sptr);
1545 }
925 1546
926 Safefree (cctx); 1547 Safefree (cctx);
927} 1548}
1549
1550/* wether this cctx should be destructed */
1551#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
928 1552
929static coro_cctx * 1553static coro_cctx *
930cctx_get (pTHX) 1554cctx_get (pTHX)
931{ 1555{
932 while (cctx_first) 1556 while (ecb_expect_true (cctx_first))
933 { 1557 {
934 coro_cctx *cctx = cctx_first; 1558 coro_cctx *cctx = cctx_first;
935 cctx_first = cctx->next; 1559 cctx_first = cctx->next;
936 --cctx_idle; 1560 --cctx_idle;
937 1561
938 if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE)) 1562 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
939 return cctx; 1563 return cctx;
940 1564
941 cctx_destroy (cctx); 1565 cctx_destroy (cctx);
942 } 1566 }
943 1567
944 return cctx_new (); 1568 return cctx_new_run ();
945} 1569}
946 1570
947static void 1571static void
948cctx_put (coro_cctx *cctx) 1572cctx_put (coro_cctx *cctx)
949{ 1573{
1574 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1575
950 /* free another cctx if overlimit */ 1576 /* free another cctx if overlimit */
951 if (cctx_idle >= MAX_IDLE_CCTX) 1577 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
952 { 1578 {
953 coro_cctx *first = cctx_first; 1579 coro_cctx *first = cctx_first;
954 cctx_first = first->next; 1580 cctx_first = first->next;
955 --cctx_idle; 1581 --cctx_idle;
956 1582
… …
962 cctx_first = cctx; 1588 cctx_first = cctx;
963} 1589}
964 1590
965/** coroutine switching *****************************************************/ 1591/** coroutine switching *****************************************************/
966 1592
967static void NOINLINE 1593static void
968transfer_check (pTHX_ struct coro *prev, struct coro *next) 1594transfer_check (pTHX_ struct coro *prev, struct coro *next)
969{ 1595{
970 if (prev != next) 1596 /* TODO: throwing up here is considered harmful */
1597
1598 if (ecb_expect_true (prev != next))
971 { 1599 {
972 if (!(prev->flags & (CF_RUNNING | CF_NEW))) 1600 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
973 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1601 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
974 1602
975 if (next->flags & CF_RUNNING) 1603 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
976 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
977
978 if (next->flags & CF_DESTROYED)
979 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1604 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
980 1605
1606#if !PERL_VERSION_ATLEAST (5,10,0)
981 if (PL_lex_state != LEX_NOTPARSING) 1607 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
982 croak ("Coro::State::transfer called while parsing, but this is not supported"); 1608 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1609#endif
983 } 1610 }
984} 1611}
985 1612
986/* always use the TRANSFER macro */ 1613/* always use the TRANSFER macro */
987static void NOINLINE 1614static void ecb_noinline /* noinline so we have a fixed stackframe */
988transfer (pTHX_ struct coro *prev, struct coro *next) 1615transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
989{ 1616{
990 dSTACKLEVEL; 1617 dSTACKLEVEL;
991 1618
992 /* sometimes transfer is only called to set idle_sp */ 1619 /* sometimes transfer is only called to set idle_sp */
993 if (!next) 1620 if (ecb_expect_false (!prev))
994 { 1621 {
995 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1622 cctx_current->idle_sp = STACKLEVEL;
996 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1623 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
997 }
998 else if (prev != next)
999 { 1624 }
1625 else if (ecb_expect_true (prev != next))
1626 {
1000 coro_cctx *prev__cctx; 1627 coro_cctx *cctx_prev;
1001 1628
1002 if (prev->flags & CF_NEW) 1629 if (ecb_expect_false (prev->flags & CF_NEW))
1003 { 1630 {
1004 /* create a new empty context */ 1631 /* create a new empty/source context */
1005 Newz (0, prev->cctx, 1, coro_cctx);
1006 prev->flags &= ~CF_NEW; 1632 prev->flags &= ~CF_NEW;
1007 prev->flags |= CF_RUNNING; 1633 prev->flags |= CF_RUNNING;
1008 } 1634 }
1009 1635
1010 prev->flags &= ~CF_RUNNING; 1636 prev->flags &= ~CF_RUNNING;
1011 next->flags |= CF_RUNNING; 1637 next->flags |= CF_RUNNING;
1012 1638
1013 LOCK; 1639 /* first get rid of the old state */
1640 save_perl (aTHX_ prev);
1014 1641
1015 if (next->flags & CF_NEW) 1642 if (ecb_expect_false (next->flags & CF_NEW))
1016 { 1643 {
1017 /* need to start coroutine */ 1644 /* need to start coroutine */
1018 next->flags &= ~CF_NEW; 1645 next->flags &= ~CF_NEW;
1019 /* first get rid of the old state */
1020 save_perl (aTHX_ prev);
1021 /* setup coroutine call */ 1646 /* setup coroutine call */
1022 coro_setup (aTHX_ next); 1647 init_perl (aTHX_ next);
1023 } 1648 }
1024 else 1649 else
1650 load_perl (aTHX_ next);
1651
1652 /* possibly untie and reuse the cctx */
1653 if (ecb_expect_true (
1654 cctx_current->idle_sp == STACKLEVEL
1655 && !(cctx_current->flags & CC_TRACE)
1656 && !force_cctx
1657 ))
1025 { 1658 {
1026 /* coroutine already started */ 1659 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1027 save_perl (aTHX_ prev); 1660 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1028 load_perl (aTHX_ next); 1661
1662 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1663 /* without this the next cctx_get might destroy the running cctx while still in use */
1664 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1665 if (ecb_expect_true (!next->cctx))
1666 next->cctx = cctx_get (aTHX);
1667
1668 cctx_put (cctx_current);
1029 } 1669 }
1670 else
1671 prev->cctx = cctx_current;
1030 1672
1031 prev__cctx = prev->cctx; 1673 ++next->usecount;
1032 1674
1033 /* possibly "free" the cctx */ 1675 cctx_prev = cctx_current;
1034 if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)) 1676 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1677
1678 next->cctx = 0;
1679
1680 if (ecb_expect_false (cctx_prev != cctx_current))
1035 { 1681 {
1036 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1682 cctx_prev->top_env = PL_top_env;
1037 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1683 PL_top_env = cctx_current->top_env;
1038 1684 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1039 prev->cctx = 0;
1040
1041 cctx_put (prev__cctx);
1042 } 1685 }
1043 1686
1044 ++next->usecount; 1687 transfer_tail (aTHX);
1045
1046 if (!next->cctx)
1047 next->cctx = cctx_get (aTHX);
1048
1049 if (prev__cctx != next->cctx)
1050 {
1051 prev__cctx->top_env = PL_top_env;
1052 PL_top_env = next->cctx->top_env;
1053 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1054 }
1055
1056 free_coro_mortal (aTHX);
1057 UNLOCK;
1058 } 1688 }
1059} 1689}
1060 1690
1061struct transfer_args
1062{
1063 struct coro *prev, *next;
1064};
1065
1066#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1691#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1067#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1692#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1068 1693
1069/** high level stuff ********************************************************/ 1694/** high level stuff ********************************************************/
1070 1695
1696/* this function is actually Coro, not Coro::State, but we call it from here */
1697/* because it is convenient - but it hasn't been declared yet for that reason */
1071static int 1698static void
1699coro_call_on_destroy (pTHX_ struct coro *coro);
1700
1701static void
1072coro_state_destroy (pTHX_ struct coro *coro) 1702coro_state_destroy (pTHX_ struct coro *coro)
1073{ 1703{
1074 if (coro->flags & CF_DESTROYED) 1704 if (coro->flags & CF_ZOMBIE)
1075 return 0; 1705 return;
1076 1706
1707 slf_destroy (aTHX_ coro);
1708
1077 coro->flags |= CF_DESTROYED; 1709 coro->flags |= CF_ZOMBIE;
1078 1710
1079 if (coro->flags & CF_READY) 1711 if (coro->flags & CF_READY)
1080 { 1712 {
1081 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1713 /* reduce nready, as destroying a ready coro effectively unreadies it */
1082 /* alternative: look through all ready queues and remove the coro */ 1714 /* alternative: look through all ready queues and remove the coro */
1083 LOCK;
1084 --coro_nready; 1715 --coro_nready;
1085 UNLOCK;
1086 } 1716 }
1087 else 1717 else
1088 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1718 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1089
1090 if (coro->mainstack && coro->mainstack != main_mainstack)
1091 {
1092 struct coro temp;
1093
1094 if (coro->flags & CF_RUNNING)
1095 croak ("FATAL: tried to destroy currently running coroutine");
1096
1097 save_perl (aTHX_ &temp);
1098 load_perl (aTHX_ coro);
1099
1100 coro_destroy (aTHX_ coro);
1101
1102 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
1103
1104 coro->mainstack = 0;
1105 }
1106
1107 cctx_destroy (coro->cctx);
1108 SvREFCNT_dec (coro->args);
1109 1719
1110 if (coro->next) coro->next->prev = coro->prev; 1720 if (coro->next) coro->next->prev = coro->prev;
1111 if (coro->prev) coro->prev->next = coro->next; 1721 if (coro->prev) coro->prev->next = coro->next;
1112 if (coro == coro_first) coro_first = coro->next; 1722 if (coro == coro_first) coro_first = coro->next;
1113 1723
1114 return 1; 1724 if (coro->mainstack
1725 && coro->mainstack != main_mainstack
1726 && coro->slot
1727 && !PL_dirty)
1728 destroy_perl (aTHX_ coro);
1729
1730 cctx_destroy (coro->cctx);
1731 SvREFCNT_dec (coro->startcv);
1732 SvREFCNT_dec (coro->args);
1733 SvREFCNT_dec (coro->swap_sv);
1734 SvREFCNT_dec (CORO_THROW);
1735
1736 coro_call_on_destroy (aTHX_ coro);
1737
1738 /* more destruction mayhem in coro_state_free */
1115} 1739}
1116 1740
1117static int 1741static int
1118coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1742coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1119{ 1743{
1120 struct coro *coro = (struct coro *)mg->mg_ptr; 1744 struct coro *coro = (struct coro *)mg->mg_ptr;
1121 mg->mg_ptr = 0; 1745 mg->mg_ptr = 0;
1122 1746
1123 coro->hv = 0;
1124
1125 if (--coro->refcnt < 0)
1126 {
1127 coro_state_destroy (aTHX_ coro); 1747 coro_state_destroy (aTHX_ coro);
1748 SvREFCNT_dec (coro->on_destroy);
1749 SvREFCNT_dec (coro->status);
1750
1128 Safefree (coro); 1751 Safefree (coro);
1129 }
1130 1752
1131 return 0; 1753 return 0;
1132} 1754}
1133 1755
1134static int 1756static int ecb_cold
1135coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1757coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1136{ 1758{
1137 struct coro *coro = (struct coro *)mg->mg_ptr; 1759 /* called when perl clones the current process the slow way (windows process emulation) */
1138 1760 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1139 ++coro->refcnt; 1761 mg->mg_ptr = 0;
1762 mg->mg_virtual = 0;
1140 1763
1141 return 0; 1764 return 0;
1142} 1765}
1143 1766
1144static MGVTBL coro_state_vtbl = { 1767static MGVTBL coro_state_vtbl = {
… …
1151# define MGf_DUP 0 1774# define MGf_DUP 0
1152#endif 1775#endif
1153}; 1776};
1154 1777
1155static void 1778static void
1156prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1779prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1157{ 1780{
1158 ta->prev = SvSTATE (prev_sv); 1781 ta->prev = SvSTATE (prev_sv);
1159 ta->next = SvSTATE (next_sv); 1782 ta->next = SvSTATE (next_sv);
1160 TRANSFER_CHECK (*ta); 1783 TRANSFER_CHECK (*ta);
1161} 1784}
1162 1785
1163static void 1786static void
1164api_transfer (SV *prev_sv, SV *next_sv) 1787api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1788{
1789 struct coro_transfer_args ta;
1790
1791 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1792 TRANSFER (ta, 1);
1793}
1794
1795/** Coro ********************************************************************/
1796
1797ecb_inline void
1798coro_enq (pTHX_ struct coro *coro)
1799{
1800 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1801
1802 SvREFCNT_inc_NN (coro->hv);
1803
1804 coro->next_ready = 0;
1805 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1806 ready [1] = coro;
1807}
1808
1809ecb_inline struct coro *
1810coro_deq (pTHX)
1811{
1812 int prio;
1813
1814 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1815 {
1816 struct coro **ready = coro_ready [prio];
1817
1818 if (ready [0])
1819 {
1820 struct coro *coro = ready [0];
1821 ready [0] = coro->next_ready;
1822 return coro;
1823 }
1824 }
1825
1826 return 0;
1827}
1828
1829static void
1830invoke_sv_ready_hook_helper (void)
1165{ 1831{
1166 dTHX; 1832 dTHX;
1167 struct transfer_args ta; 1833 dSP;
1168 1834
1169 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1835 ENTER;
1170 TRANSFER (ta); 1836 SAVETMPS;
1171}
1172 1837
1173/** Coro ********************************************************************/ 1838 PUSHMARK (SP);
1839 PUTBACK;
1840 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1174 1841
1175static void 1842 FREETMPS;
1176coro_enq (pTHX_ SV *coro_sv) 1843 LEAVE;
1177{
1178 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1179}
1180
1181static SV *
1182coro_deq (pTHX_ int min_prio)
1183{
1184 int prio = PRIO_MAX - PRIO_MIN;
1185
1186 min_prio -= PRIO_MIN;
1187 if (min_prio < 0)
1188 min_prio = 0;
1189
1190 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1191 if (AvFILLp (coro_ready [prio]) >= 0)
1192 return av_shift (coro_ready [prio]);
1193
1194 return 0;
1195} 1844}
1196 1845
1197static int 1846static int
1198api_ready (SV *coro_sv) 1847api_ready (pTHX_ SV *coro_sv)
1199{ 1848{
1200 dTHX;
1201 struct coro *coro;
1202
1203 if (SvROK (coro_sv))
1204 coro_sv = SvRV (coro_sv);
1205
1206 coro = SvSTATE (coro_sv); 1849 struct coro *coro = SvSTATE (coro_sv);
1207 1850
1208 if (coro->flags & CF_READY) 1851 if (coro->flags & CF_READY)
1209 return 0; 1852 return 0;
1210 1853
1211 coro->flags |= CF_READY; 1854 coro->flags |= CF_READY;
1212 1855
1213 LOCK; 1856 coro_enq (aTHX_ coro);
1214 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1857
1215 ++coro_nready; 1858 if (!coro_nready++)
1216 UNLOCK; 1859 if (coroapi.readyhook)
1860 coroapi.readyhook ();
1217 1861
1218 return 1; 1862 return 1;
1219} 1863}
1220 1864
1221static int 1865static int
1222api_is_ready (SV *coro_sv) 1866api_is_ready (pTHX_ SV *coro_sv)
1223{ 1867{
1224 dTHX;
1225 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1868 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1226} 1869}
1227 1870
1228static void 1871/* expects to own a reference to next->hv */
1872ecb_inline void
1229prepare_schedule (pTHX_ struct transfer_args *ta) 1873prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1230{ 1874{
1231 SV *prev_sv, *next_sv;
1232
1233 for (;;)
1234 {
1235 LOCK;
1236 next_sv = coro_deq (aTHX_ PRIO_MIN);
1237
1238 /* nothing to schedule: call the idle handler */
1239 if (!next_sv)
1240 {
1241 dSP;
1242 UNLOCK;
1243
1244 ENTER;
1245 SAVETMPS;
1246
1247 PUSHMARK (SP);
1248 PUTBACK;
1249 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1250
1251 FREETMPS;
1252 LEAVE;
1253 continue;
1254 }
1255
1256 ta->next = SvSTATE (next_sv);
1257
1258 /* cannot transfer to destroyed coros, skip and look for next */
1259 if (ta->next->flags & CF_DESTROYED)
1260 {
1261 UNLOCK;
1262 SvREFCNT_dec (next_sv);
1263 /* coro_nready is already taken care of by destroy */
1264 continue;
1265 }
1266
1267 --coro_nready;
1268 UNLOCK;
1269 break;
1270 }
1271
1272 /* free this only after the transfer */
1273 prev_sv = SvRV (coro_current); 1875 SV *prev_sv = SvRV (coro_current);
1876
1274 ta->prev = SvSTATE (prev_sv); 1877 ta->prev = SvSTATE_hv (prev_sv);
1878 ta->next = next;
1879
1275 TRANSFER_CHECK (*ta); 1880 TRANSFER_CHECK (*ta);
1276 assert (ta->next->flags & CF_READY); 1881
1277 ta->next->flags &= ~CF_READY;
1278 SvRV_set (coro_current, next_sv); 1882 SvRV_set (coro_current, (SV *)next->hv);
1279 1883
1280 LOCK;
1281 free_coro_mortal (aTHX); 1884 free_coro_mortal (aTHX);
1282 coro_mortal = prev_sv; 1885 coro_mortal = prev_sv;
1283 UNLOCK;
1284} 1886}
1285 1887
1286static void 1888static void
1889prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1890{
1891 for (;;)
1892 {
1893 struct coro *next = coro_deq (aTHX);
1894
1895 if (ecb_expect_true (next))
1896 {
1897 /* cannot transfer to destroyed coros, skip and look for next */
1898 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1899 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1900 else
1901 {
1902 next->flags &= ~CF_READY;
1903 --coro_nready;
1904
1905 prepare_schedule_to (aTHX_ ta, next);
1906 break;
1907 }
1908 }
1909 else
1910 {
1911 /* nothing to schedule: call the idle handler */
1912 if (SvROK (sv_idle)
1913 && SvOBJECT (SvRV (sv_idle)))
1914 {
1915 if (SvRV (sv_idle) == SvRV (coro_current))
1916 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1917
1918 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1919 api_ready (aTHX_ SvRV (sv_idle));
1920 --coro_nready;
1921 }
1922 else
1923 {
1924 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1925 dSP;
1926
1927 ENTER;
1928 SAVETMPS;
1929
1930 PUSHMARK (SP);
1931 PUTBACK;
1932 call_sv (sv_idle, G_VOID | G_DISCARD);
1933
1934 FREETMPS;
1935 LEAVE;
1936 }
1937 }
1938 }
1939}
1940
1941ecb_inline void
1287prepare_cede (pTHX_ struct transfer_args *ta) 1942prepare_cede (pTHX_ struct coro_transfer_args *ta)
1288{ 1943{
1289 api_ready (coro_current); 1944 api_ready (aTHX_ coro_current);
1290 prepare_schedule (aTHX_ ta); 1945 prepare_schedule (aTHX_ ta);
1291} 1946}
1292 1947
1948ecb_inline void
1949prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1950{
1951 SV *prev = SvRV (coro_current);
1952
1953 if (coro_nready)
1954 {
1955 prepare_schedule (aTHX_ ta);
1956 api_ready (aTHX_ prev);
1957 }
1958 else
1959 prepare_nop (aTHX_ ta);
1960}
1961
1962static void
1963api_schedule (pTHX)
1964{
1965 struct coro_transfer_args ta;
1966
1967 prepare_schedule (aTHX_ &ta);
1968 TRANSFER (ta, 1);
1969}
1970
1971static void
1972api_schedule_to (pTHX_ SV *coro_sv)
1973{
1974 struct coro_transfer_args ta;
1975 struct coro *next = SvSTATE (coro_sv);
1976
1977 SvREFCNT_inc_NN (coro_sv);
1978 prepare_schedule_to (aTHX_ &ta, next);
1979}
1980
1293static int 1981static int
1294prepare_cede_notself (pTHX_ struct transfer_args *ta) 1982api_cede (pTHX)
1295{ 1983{
1296 if (coro_nready) 1984 struct coro_transfer_args ta;
1297 { 1985
1298 SV *prev = SvRV (coro_current);
1299 prepare_schedule (aTHX_ ta); 1986 prepare_cede (aTHX_ &ta);
1300 api_ready (prev); 1987
1988 if (ecb_expect_true (ta.prev != ta.next))
1989 {
1990 TRANSFER (ta, 1);
1301 return 1; 1991 return 1;
1302 } 1992 }
1303 else 1993 else
1304 return 0; 1994 return 0;
1305} 1995}
1306 1996
1307static void
1308api_schedule (void)
1309{
1310 dTHX;
1311 struct transfer_args ta;
1312
1313 prepare_schedule (aTHX_ &ta);
1314 TRANSFER (ta);
1315}
1316
1317static int 1997static int
1318api_cede (void) 1998api_cede_notself (pTHX)
1319{ 1999{
1320 dTHX; 2000 if (coro_nready)
2001 {
1321 struct transfer_args ta; 2002 struct coro_transfer_args ta;
1322 2003
1323 prepare_cede (aTHX_ &ta); 2004 prepare_cede_notself (aTHX_ &ta);
1324
1325 if (ta.prev != ta.next)
1326 {
1327 TRANSFER (ta); 2005 TRANSFER (ta, 1);
1328 return 1; 2006 return 1;
1329 } 2007 }
1330 else 2008 else
1331 return 0; 2009 return 0;
1332} 2010}
1333 2011
1334static int 2012static void
1335api_cede_notself (void)
1336{
1337 dTHX;
1338 struct transfer_args ta;
1339
1340 if (prepare_cede_notself (aTHX_ &ta))
1341 {
1342 TRANSFER (ta);
1343 return 1;
1344 }
1345 else
1346 return 0;
1347}
1348
1349static void
1350api_trace (SV *coro_sv, int flags) 2013api_trace (pTHX_ SV *coro_sv, int flags)
1351{ 2014{
1352 dTHX;
1353 struct coro *coro = SvSTATE (coro_sv); 2015 struct coro *coro = SvSTATE (coro_sv);
1354 2016
2017 if (coro->flags & CF_RUNNING)
2018 croak ("cannot enable tracing on a running coroutine, caught");
2019
1355 if (flags & CC_TRACE) 2020 if (flags & CC_TRACE)
1356 { 2021 {
1357 if (!coro->cctx) 2022 if (!coro->cctx)
1358 coro->cctx = cctx_new (); 2023 coro->cctx = cctx_new_run ();
1359 else if (!(coro->cctx->flags & CC_TRACE)) 2024 else if (!(coro->cctx->flags & CC_TRACE))
1360 croak ("cannot enable tracing on coroutine with custom stack"); 2025 croak ("cannot enable tracing on coroutine with custom stack, caught");
1361 2026
1362 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 2027 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1363 } 2028 }
1364 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 2029 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1365 { 2030 {
1366 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL); 2031 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1367 2032
1368 if (coro->flags & CF_RUNNING) 2033 if (coro->flags & CF_RUNNING)
1369 PL_runops = RUNOPS_DEFAULT; 2034 PL_runops = RUNOPS_DEFAULT;
1370 else 2035 else
1371 coro->runops = RUNOPS_DEFAULT; 2036 coro->slot->runops = RUNOPS_DEFAULT;
2037 }
2038}
2039
2040static void
2041coro_push_av (pTHX_ AV *av, I32 gimme_v)
2042{
2043 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2044 {
2045 dSP;
2046
2047 if (gimme_v == G_SCALAR)
2048 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2049 else
2050 {
2051 int i;
2052 EXTEND (SP, AvFILLp (av) + 1);
2053
2054 for (i = 0; i <= AvFILLp (av); ++i)
2055 PUSHs (AvARRAY (av)[i]);
2056 }
2057
2058 PUTBACK;
2059 }
2060}
2061
2062static void
2063coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2064{
2065 if (!coro->on_destroy)
2066 coro->on_destroy = newAV ();
2067
2068 av_push (coro->on_destroy, cb);
2069}
2070
2071static void
2072slf_destroy_join (pTHX_ struct CoroSLF *frame)
2073{
2074 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2075}
2076
2077static int
2078slf_check_join (pTHX_ struct CoroSLF *frame)
2079{
2080 struct coro *coro = (struct coro *)frame->data;
2081
2082 if (!coro->status)
2083 return 1;
2084
2085 frame->destroy = 0;
2086
2087 coro_push_av (aTHX_ coro->status, GIMME_V);
2088
2089 SvREFCNT_dec ((SV *)coro->hv);
2090
2091 return 0;
2092}
2093
2094static void
2095slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2096{
2097 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2098
2099 if (items > 1)
2100 croak ("join called with too many arguments");
2101
2102 if (coro->status)
2103 frame->prepare = prepare_nop;
2104 else
2105 {
2106 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2107 frame->prepare = prepare_schedule;
2108 }
2109
2110 frame->check = slf_check_join;
2111 frame->destroy = slf_destroy_join;
2112 frame->data = (void *)coro;
2113 SvREFCNT_inc (coro->hv);
2114}
2115
2116static void
2117coro_call_on_destroy (pTHX_ struct coro *coro)
2118{
2119 AV *od = coro->on_destroy;
2120
2121 if (!od)
2122 return;
2123
2124 while (AvFILLp (od) >= 0)
2125 {
2126 SV *cb = sv_2mortal (av_pop (od));
2127
2128 /* coro hv's (and only hv's at the moment) are supported as well */
2129 if (SvSTATEhv_p (aTHX_ cb))
2130 api_ready (aTHX_ cb);
2131 else
2132 {
2133 dSP; /* don't disturb outer sp */
2134 PUSHMARK (SP);
2135
2136 if (coro->status)
2137 {
2138 PUTBACK;
2139 coro_push_av (aTHX_ coro->status, G_ARRAY);
2140 SPAGAIN;
2141 }
2142
2143 PUTBACK;
2144 call_sv (cb, G_VOID | G_DISCARD);
2145 }
2146 }
2147}
2148
2149static void
2150coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2151{
2152 AV *av;
2153
2154 if (coro->status)
2155 {
2156 av = coro->status;
2157 av_clear (av);
2158 }
2159 else
2160 av = coro->status = newAV ();
2161
2162 /* items are actually not so common, so optimise for this case */
2163 if (items)
2164 {
2165 int i;
2166
2167 av_extend (av, items - 1);
2168
2169 for (i = 0; i < items; ++i)
2170 av_push (av, SvREFCNT_inc_NN (arg [i]));
2171 }
2172}
2173
2174static void
2175slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2176{
2177 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2178 api_ready (aTHX_ sv_manager);
2179
2180 frame->prepare = prepare_schedule;
2181 frame->check = slf_check_repeat;
2182
2183 /* as a minor optimisation, we could unwind all stacks here */
2184 /* but that puts extra pressure on pp_slf, and is not worth much */
2185 /*coro_unwind_stacks (aTHX);*/
2186}
2187
2188static void
2189slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2190{
2191 HV *coro_hv = (HV *)SvRV (coro_current);
2192
2193 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2194 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2195}
2196
2197static void
2198slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2199{
2200 HV *coro_hv;
2201 struct coro *coro;
2202
2203 if (items <= 0)
2204 croak ("Coro::cancel called without coro object,");
2205
2206 coro = SvSTATE (arg [0]);
2207 coro_hv = coro->hv;
2208
2209 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2210
2211 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2212 {
2213 /* coro currently busy cancelling something, so just notify it */
2214 coro->slf_frame.data = (void *)coro;
2215
2216 frame->prepare = prepare_nop;
2217 frame->check = slf_check_nop;
2218 }
2219 else if (coro_hv == (HV *)SvRV (coro_current))
2220 {
2221 /* cancelling the current coro is allowed, and equals terminate */
2222 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2223 }
2224 else
2225 {
2226 struct coro *self = SvSTATE_current;
2227
2228 /* otherwise we cancel directly, purely for speed reasons
2229 * unfortunately, this requires some magic trickery, as
2230 * somebody else could cancel us, so we have to fight the cancellation.
2231 * this is ugly, and hopefully fully worth the extra speed.
2232 * besides, I can't get the slow-but-safe version working...
2233 */
2234 slf_frame.data = 0;
2235 self->flags |= CF_NOCANCEL;
2236 coro_state_destroy (aTHX_ coro);
2237 self->flags &= ~CF_NOCANCEL;
2238
2239 if (slf_frame.data)
2240 {
2241 /* while we were busy we have been cancelled, so terminate */
2242 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2243 }
2244 else
2245 {
2246 frame->prepare = prepare_nop;
2247 frame->check = slf_check_nop;
2248 }
2249 }
2250}
2251
2252static int
2253slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2254{
2255 frame->prepare = 0;
2256 coro_unwind_stacks (aTHX);
2257
2258 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2259
2260 return 1;
2261}
2262
2263static int
2264safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2265{
2266 if (coro->cctx)
2267 croak ("coro inside C callback, unable to cancel at this time, caught");
2268
2269 if (coro->flags & CF_NEW)
2270 {
2271 coro_set_status (aTHX_ coro, arg, items);
2272 coro_state_destroy (aTHX_ coro);
2273 }
2274 else
2275 {
2276 if (!coro->slf_frame.prepare)
2277 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2278
2279 slf_destroy (aTHX_ coro);
2280
2281 coro_set_status (aTHX_ coro, arg, items);
2282 coro->slf_frame.prepare = prepare_nop;
2283 coro->slf_frame.check = slf_check_safe_cancel;
2284
2285 api_ready (aTHX_ (SV *)coro->hv);
2286 }
2287
2288 return 1;
2289}
2290
2291/*****************************************************************************/
2292/* async pool handler */
2293
2294static int
2295slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2296{
2297 HV *hv = (HV *)SvRV (coro_current);
2298 struct coro *coro = (struct coro *)frame->data;
2299
2300 if (!coro->invoke_cb)
2301 return 1; /* loop till we have invoke */
2302 else
2303 {
2304 hv_store (hv, "desc", sizeof ("desc") - 1,
2305 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2306
2307 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2308
2309 {
2310 dSP;
2311 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2312 PUTBACK;
1372 } 2313 }
2314
2315 SvREFCNT_dec (GvAV (PL_defgv));
2316 GvAV (PL_defgv) = coro->invoke_av;
2317 coro->invoke_av = 0;
2318
2319 return 0;
2320 }
1373} 2321}
2322
2323static void
2324slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2325{
2326 HV *hv = (HV *)SvRV (coro_current);
2327 struct coro *coro = SvSTATE_hv ((SV *)hv);
2328
2329 if (ecb_expect_true (coro->saved_deffh))
2330 {
2331 /* subsequent iteration */
2332 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2333 coro->saved_deffh = 0;
2334
2335 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2336 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2337 {
2338 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2339 return;
2340 }
2341 else
2342 {
2343 av_clear (GvAV (PL_defgv));
2344 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2345
2346 coro->prio = 0;
2347
2348 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2349 api_trace (aTHX_ coro_current, 0);
2350
2351 frame->prepare = prepare_schedule;
2352 av_push (av_async_pool, SvREFCNT_inc (hv));
2353 }
2354 }
2355 else
2356 {
2357 /* first iteration, simply fall through */
2358 frame->prepare = prepare_nop;
2359 }
2360
2361 frame->check = slf_check_pool_handler;
2362 frame->data = (void *)coro;
2363}
2364
2365/*****************************************************************************/
2366/* rouse callback */
2367
2368#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2369
2370static void
2371coro_rouse_callback (pTHX_ CV *cv)
2372{
2373 dXSARGS;
2374 SV *data = (SV *)S_GENSUB_ARG;
2375
2376 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2377 {
2378 /* first call, set args */
2379 SV *coro = SvRV (data);
2380 AV *av = newAV ();
2381
2382 SvRV_set (data, (SV *)av);
2383
2384 /* better take a full copy of the arguments */
2385 while (items--)
2386 av_store (av, items, newSVsv (ST (items)));
2387
2388 api_ready (aTHX_ coro);
2389 SvREFCNT_dec (coro);
2390 }
2391
2392 XSRETURN_EMPTY;
2393}
2394
2395static int
2396slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2397{
2398 SV *data = (SV *)frame->data;
2399
2400 if (CORO_THROW)
2401 return 0;
2402
2403 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2404 return 1;
2405
2406 /* now push all results on the stack */
2407 {
2408 dSP;
2409 AV *av = (AV *)SvRV (data);
2410 int i;
2411
2412 EXTEND (SP, AvFILLp (av) + 1);
2413 for (i = 0; i <= AvFILLp (av); ++i)
2414 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2415
2416 /* we have stolen the elements, so set length to zero and free */
2417 AvFILLp (av) = -1;
2418 av_undef (av);
2419
2420 PUTBACK;
2421 }
2422
2423 return 0;
2424}
2425
2426static void
2427slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2428{
2429 SV *cb;
2430
2431 if (items)
2432 cb = arg [0];
2433 else
2434 {
2435 struct coro *coro = SvSTATE_current;
2436
2437 if (!coro->rouse_cb)
2438 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2439
2440 cb = sv_2mortal (coro->rouse_cb);
2441 coro->rouse_cb = 0;
2442 }
2443
2444 if (!SvROK (cb)
2445 || SvTYPE (SvRV (cb)) != SVt_PVCV
2446 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2447 croak ("Coro::rouse_wait called with illegal callback argument,");
2448
2449 {
2450 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2451 SV *data = (SV *)S_GENSUB_ARG;
2452
2453 frame->data = (void *)data;
2454 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2455 frame->check = slf_check_rouse_wait;
2456 }
2457}
2458
2459static SV *
2460coro_new_rouse_cb (pTHX)
2461{
2462 HV *hv = (HV *)SvRV (coro_current);
2463 struct coro *coro = SvSTATE_hv (hv);
2464 SV *data = newRV_inc ((SV *)hv);
2465 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2466
2467 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2468 SvREFCNT_dec (data); /* magicext increases the refcount */
2469
2470 SvREFCNT_dec (coro->rouse_cb);
2471 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2472
2473 return cb;
2474}
2475
2476/*****************************************************************************/
2477/* schedule-like-function opcode (SLF) */
2478
2479static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2480static const CV *slf_cv;
2481static SV **slf_argv;
2482static int slf_argc, slf_arga; /* count, allocated */
2483static I32 slf_ax; /* top of stack, for restore */
2484
2485/* this restores the stack in the case we patched the entersub, to */
2486/* recreate the stack frame as perl will on following calls */
2487/* since entersub cleared the stack */
2488static OP *
2489pp_restore (pTHX)
2490{
2491 int i;
2492 SV **SP = PL_stack_base + slf_ax;
2493
2494 PUSHMARK (SP);
2495
2496 EXTEND (SP, slf_argc + 1);
2497
2498 for (i = 0; i < slf_argc; ++i)
2499 PUSHs (sv_2mortal (slf_argv [i]));
2500
2501 PUSHs ((SV *)CvGV (slf_cv));
2502
2503 RETURNOP (slf_restore.op_first);
2504}
2505
2506static void
2507slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2508{
2509 SV **arg = (SV **)slf_frame.data;
2510
2511 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2512}
2513
2514static void
2515slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2516{
2517 if (items != 2)
2518 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2519
2520 frame->prepare = slf_prepare_transfer;
2521 frame->check = slf_check_nop;
2522 frame->data = (void *)arg; /* let's hope it will stay valid */
2523}
2524
2525static void
2526slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2527{
2528 frame->prepare = prepare_schedule;
2529 frame->check = slf_check_nop;
2530}
2531
2532static void
2533slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2534{
2535 struct coro *next = (struct coro *)slf_frame.data;
2536
2537 SvREFCNT_inc_NN (next->hv);
2538 prepare_schedule_to (aTHX_ ta, next);
2539}
2540
2541static void
2542slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2543{
2544 if (!items)
2545 croak ("Coro::schedule_to expects a coroutine argument, caught");
2546
2547 frame->data = (void *)SvSTATE (arg [0]);
2548 frame->prepare = slf_prepare_schedule_to;
2549 frame->check = slf_check_nop;
2550}
2551
2552static void
2553slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2554{
2555 api_ready (aTHX_ SvRV (coro_current));
2556
2557 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2558}
2559
2560static void
2561slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2562{
2563 frame->prepare = prepare_cede;
2564 frame->check = slf_check_nop;
2565}
2566
2567static void
2568slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2569{
2570 frame->prepare = prepare_cede_notself;
2571 frame->check = slf_check_nop;
2572}
2573
2574/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2575static void
2576slf_destroy (pTHX_ struct coro *coro)
2577{
2578 /* this callback is reserved for slf functions needing to do cleanup */
2579 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2580 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2581
2582 /*
2583 * The on_destroy above most likely is from an SLF call.
2584 * Since by definition the SLF call will not finish when we destroy
2585 * the coro, we will have to force-finish it here, otherwise
2586 * cleanup functions cannot call SLF functions.
2587 */
2588 coro->slf_frame.prepare = 0;
2589}
2590
2591/*
2592 * these not obviously related functions are all rolled into one
2593 * function to increase chances that they all will call transfer with the same
2594 * stack offset
2595 * SLF stands for "schedule-like-function".
2596 */
2597static OP *
2598pp_slf (pTHX)
2599{
2600 I32 checkmark; /* mark SP to see how many elements check has pushed */
2601
2602 /* set up the slf frame, unless it has already been set-up */
2603 /* the latter happens when a new coro has been started */
2604 /* or when a new cctx was attached to an existing coroutine */
2605 if (ecb_expect_true (!slf_frame.prepare))
2606 {
2607 /* first iteration */
2608 dSP;
2609 SV **arg = PL_stack_base + TOPMARK + 1;
2610 int items = SP - arg; /* args without function object */
2611 SV *gv = *sp;
2612
2613 /* do a quick consistency check on the "function" object, and if it isn't */
2614 /* for us, divert to the real entersub */
2615 if (SvTYPE (gv) != SVt_PVGV
2616 || !GvCV (gv)
2617 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2618 return PL_ppaddr[OP_ENTERSUB](aTHX);
2619
2620 if (!(PL_op->op_flags & OPf_STACKED))
2621 {
2622 /* ampersand-form of call, use @_ instead of stack */
2623 AV *av = GvAV (PL_defgv);
2624 arg = AvARRAY (av);
2625 items = AvFILLp (av) + 1;
2626 }
2627
2628 /* now call the init function, which needs to set up slf_frame */
2629 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2630 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2631
2632 /* pop args */
2633 SP = PL_stack_base + POPMARK;
2634
2635 PUTBACK;
2636 }
2637
2638 /* now that we have a slf_frame, interpret it! */
2639 /* we use a callback system not to make the code needlessly */
2640 /* complicated, but so we can run multiple perl coros from one cctx */
2641
2642 do
2643 {
2644 struct coro_transfer_args ta;
2645
2646 slf_frame.prepare (aTHX_ &ta);
2647 TRANSFER (ta, 0);
2648
2649 checkmark = PL_stack_sp - PL_stack_base;
2650 }
2651 while (slf_frame.check (aTHX_ &slf_frame));
2652
2653 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2654
2655 /* exception handling */
2656 if (ecb_expect_false (CORO_THROW))
2657 {
2658 SV *exception = sv_2mortal (CORO_THROW);
2659
2660 CORO_THROW = 0;
2661 sv_setsv (ERRSV, exception);
2662 croak (0);
2663 }
2664
2665 /* return value handling - mostly like entersub */
2666 /* make sure we put something on the stack in scalar context */
2667 if (GIMME_V == G_SCALAR
2668 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2669 {
2670 dSP;
2671 SV **bot = PL_stack_base + checkmark;
2672
2673 if (sp == bot) /* too few, push undef */
2674 bot [1] = &PL_sv_undef;
2675 else /* too many, take last one */
2676 bot [1] = *sp;
2677
2678 SP = bot + 1;
2679
2680 PUTBACK;
2681 }
2682
2683 return NORMAL;
2684}
2685
2686static void
2687api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2688{
2689 int i;
2690 SV **arg = PL_stack_base + ax;
2691 int items = PL_stack_sp - arg + 1;
2692
2693 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2694
2695 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2696 && PL_op->op_ppaddr != pp_slf)
2697 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2698
2699 CvFLAGS (cv) |= CVf_SLF;
2700 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2701 slf_cv = cv;
2702
2703 /* we patch the op, and then re-run the whole call */
2704 /* we have to put the same argument on the stack for this to work */
2705 /* and this will be done by pp_restore */
2706 slf_restore.op_next = (OP *)&slf_restore;
2707 slf_restore.op_type = OP_CUSTOM;
2708 slf_restore.op_ppaddr = pp_restore;
2709 slf_restore.op_first = PL_op;
2710
2711 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2712
2713 if (PL_op->op_flags & OPf_STACKED)
2714 {
2715 if (items > slf_arga)
2716 {
2717 slf_arga = items;
2718 Safefree (slf_argv);
2719 New (0, slf_argv, slf_arga, SV *);
2720 }
2721
2722 slf_argc = items;
2723
2724 for (i = 0; i < items; ++i)
2725 slf_argv [i] = SvREFCNT_inc (arg [i]);
2726 }
2727 else
2728 slf_argc = 0;
2729
2730 PL_op->op_ppaddr = pp_slf;
2731 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2732
2733 PL_op = (OP *)&slf_restore;
2734}
2735
2736/*****************************************************************************/
2737/* dynamic wind */
2738
2739static void
2740on_enterleave_call (pTHX_ SV *cb)
2741{
2742 dSP;
2743
2744 PUSHSTACK;
2745
2746 PUSHMARK (SP);
2747 PUTBACK;
2748 call_sv (cb, G_VOID | G_DISCARD);
2749 SPAGAIN;
2750
2751 POPSTACK;
2752}
2753
2754static SV *
2755coro_avp_pop_and_free (pTHX_ AV **avp)
2756{
2757 AV *av = *avp;
2758 SV *res = av_pop (av);
2759
2760 if (AvFILLp (av) < 0)
2761 {
2762 *avp = 0;
2763 SvREFCNT_dec (av);
2764 }
2765
2766 return res;
2767}
2768
2769static void
2770coro_pop_on_enter (pTHX_ void *coro)
2771{
2772 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2773 SvREFCNT_dec (cb);
2774}
2775
2776static void
2777coro_pop_on_leave (pTHX_ void *coro)
2778{
2779 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2780 on_enterleave_call (aTHX_ sv_2mortal (cb));
2781}
2782
2783/*****************************************************************************/
2784/* PerlIO::cede */
2785
2786typedef struct
2787{
2788 PerlIOBuf base;
2789 NV next, every;
2790} PerlIOCede;
2791
2792static IV ecb_cold
2793PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2794{
2795 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2796
2797 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2798 self->next = nvtime () + self->every;
2799
2800 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2801}
2802
2803static SV * ecb_cold
2804PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2805{
2806 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2807
2808 return newSVnv (self->every);
2809}
2810
2811static IV
2812PerlIOCede_flush (pTHX_ PerlIO *f)
2813{
2814 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2815 double now = nvtime ();
2816
2817 if (now >= self->next)
2818 {
2819 api_cede (aTHX);
2820 self->next = now + self->every;
2821 }
2822
2823 return PerlIOBuf_flush (aTHX_ f);
2824}
2825
2826static PerlIO_funcs PerlIO_cede =
2827{
2828 sizeof(PerlIO_funcs),
2829 "cede",
2830 sizeof(PerlIOCede),
2831 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2832 PerlIOCede_pushed,
2833 PerlIOBuf_popped,
2834 PerlIOBuf_open,
2835 PerlIOBase_binmode,
2836 PerlIOCede_getarg,
2837 PerlIOBase_fileno,
2838 PerlIOBuf_dup,
2839 PerlIOBuf_read,
2840 PerlIOBuf_unread,
2841 PerlIOBuf_write,
2842 PerlIOBuf_seek,
2843 PerlIOBuf_tell,
2844 PerlIOBuf_close,
2845 PerlIOCede_flush,
2846 PerlIOBuf_fill,
2847 PerlIOBase_eof,
2848 PerlIOBase_error,
2849 PerlIOBase_clearerr,
2850 PerlIOBase_setlinebuf,
2851 PerlIOBuf_get_base,
2852 PerlIOBuf_bufsiz,
2853 PerlIOBuf_get_ptr,
2854 PerlIOBuf_get_cnt,
2855 PerlIOBuf_set_ptrcnt,
2856};
2857
2858/*****************************************************************************/
2859/* Coro::Semaphore & Coro::Signal */
2860
2861static SV *
2862coro_waitarray_new (pTHX_ int count)
2863{
2864 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2865 AV *av = newAV ();
2866 SV **ary;
2867
2868 /* unfortunately, building manually saves memory */
2869 Newx (ary, 2, SV *);
2870 AvALLOC (av) = ary;
2871#if PERL_VERSION_ATLEAST (5,10,0)
2872 AvARRAY (av) = ary;
2873#else
2874 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2875 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2876 SvPVX ((SV *)av) = (char *)ary;
2877#endif
2878 AvMAX (av) = 1;
2879 AvFILLp (av) = 0;
2880 ary [0] = newSViv (count);
2881
2882 return newRV_noinc ((SV *)av);
2883}
2884
2885/* semaphore */
2886
2887static void
2888coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2889{
2890 SV *count_sv = AvARRAY (av)[0];
2891 IV count = SvIVX (count_sv);
2892
2893 count += adjust;
2894 SvIVX (count_sv) = count;
2895
2896 /* now wake up as many waiters as are expected to lock */
2897 while (count > 0 && AvFILLp (av) > 0)
2898 {
2899 SV *cb;
2900
2901 /* swap first two elements so we can shift a waiter */
2902 AvARRAY (av)[0] = AvARRAY (av)[1];
2903 AvARRAY (av)[1] = count_sv;
2904 cb = av_shift (av);
2905
2906 if (SvOBJECT (cb))
2907 {
2908 api_ready (aTHX_ cb);
2909 --count;
2910 }
2911 else if (SvTYPE (cb) == SVt_PVCV)
2912 {
2913 dSP;
2914 PUSHMARK (SP);
2915 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2916 PUTBACK;
2917 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2918 }
2919
2920 SvREFCNT_dec (cb);
2921 }
2922}
2923
2924static void
2925coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2926{
2927 /* call $sem->adjust (0) to possibly wake up some other waiters */
2928 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2929}
2930
2931static int
2932slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2933{
2934 AV *av = (AV *)frame->data;
2935 SV *count_sv = AvARRAY (av)[0];
2936 SV *coro_hv = SvRV (coro_current);
2937
2938 /* if we are about to throw, don't actually acquire the lock, just throw */
2939 if (CORO_THROW)
2940 return 0;
2941 else if (SvIVX (count_sv) > 0)
2942 {
2943 frame->destroy = 0;
2944
2945 if (acquire)
2946 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2947 else
2948 coro_semaphore_adjust (aTHX_ av, 0);
2949
2950 return 0;
2951 }
2952 else
2953 {
2954 int i;
2955 /* if we were woken up but can't down, we look through the whole */
2956 /* waiters list and only add us if we aren't in there already */
2957 /* this avoids some degenerate memory usage cases */
2958 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
2959 if (AvARRAY (av)[i] == coro_hv)
2960 return 1;
2961
2962 av_push (av, SvREFCNT_inc (coro_hv));
2963 return 1;
2964 }
2965}
2966
2967static int
2968slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2969{
2970 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2971}
2972
2973static int
2974slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2975{
2976 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2977}
2978
2979static void
2980slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2981{
2982 AV *av = (AV *)SvRV (arg [0]);
2983
2984 if (SvIVX (AvARRAY (av)[0]) > 0)
2985 {
2986 frame->data = (void *)av;
2987 frame->prepare = prepare_nop;
2988 }
2989 else
2990 {
2991 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2992
2993 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2994 frame->prepare = prepare_schedule;
2995 /* to avoid race conditions when a woken-up coro gets terminated */
2996 /* we arrange for a temporary on_destroy that calls adjust (0) */
2997 frame->destroy = coro_semaphore_destroy;
2998 }
2999}
3000
3001static void
3002slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3003{
3004 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3005 frame->check = slf_check_semaphore_down;
3006}
3007
3008static void
3009slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3010{
3011 if (items >= 2)
3012 {
3013 /* callback form */
3014 AV *av = (AV *)SvRV (arg [0]);
3015 SV *cb_cv = s_get_cv_croak (arg [1]);
3016
3017 av_push (av, SvREFCNT_inc_NN (cb_cv));
3018
3019 if (SvIVX (AvARRAY (av)[0]) > 0)
3020 coro_semaphore_adjust (aTHX_ av, 0);
3021
3022 frame->prepare = prepare_nop;
3023 frame->check = slf_check_nop;
3024 }
3025 else
3026 {
3027 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3028 frame->check = slf_check_semaphore_wait;
3029 }
3030}
3031
3032/* signal */
3033
3034static void
3035coro_signal_wake (pTHX_ AV *av, int count)
3036{
3037 SvIVX (AvARRAY (av)[0]) = 0;
3038
3039 /* now signal count waiters */
3040 while (count > 0 && AvFILLp (av) > 0)
3041 {
3042 SV *cb;
3043
3044 /* swap first two elements so we can shift a waiter */
3045 cb = AvARRAY (av)[0];
3046 AvARRAY (av)[0] = AvARRAY (av)[1];
3047 AvARRAY (av)[1] = cb;
3048
3049 cb = av_shift (av);
3050
3051 if (SvTYPE (cb) == SVt_PVCV)
3052 {
3053 dSP;
3054 PUSHMARK (SP);
3055 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3056 PUTBACK;
3057 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3058 }
3059 else
3060 {
3061 api_ready (aTHX_ cb);
3062 sv_setiv (cb, 0); /* signal waiter */
3063 }
3064
3065 SvREFCNT_dec (cb);
3066
3067 --count;
3068 }
3069}
3070
3071static int
3072slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3073{
3074 /* if we are about to throw, also stop waiting */
3075 return SvROK ((SV *)frame->data) && !CORO_THROW;
3076}
3077
3078static void
3079slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3080{
3081 AV *av = (AV *)SvRV (arg [0]);
3082
3083 if (items >= 2)
3084 {
3085 SV *cb_cv = s_get_cv_croak (arg [1]);
3086 av_push (av, SvREFCNT_inc_NN (cb_cv));
3087
3088 if (SvIVX (AvARRAY (av)[0]))
3089 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3090
3091 frame->prepare = prepare_nop;
3092 frame->check = slf_check_nop;
3093 }
3094 else if (SvIVX (AvARRAY (av)[0]))
3095 {
3096 SvIVX (AvARRAY (av)[0]) = 0;
3097 frame->prepare = prepare_nop;
3098 frame->check = slf_check_nop;
3099 }
3100 else
3101 {
3102 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3103
3104 av_push (av, waiter);
3105
3106 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3107 frame->prepare = prepare_schedule;
3108 frame->check = slf_check_signal_wait;
3109 }
3110}
3111
3112/*****************************************************************************/
3113/* Coro::AIO */
3114
3115#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3116
3117/* helper storage struct */
3118struct io_state
3119{
3120 int errorno;
3121 I32 laststype; /* U16 in 5.10.0 */
3122 int laststatval;
3123 Stat_t statcache;
3124};
3125
3126static void
3127coro_aio_callback (pTHX_ CV *cv)
3128{
3129 dXSARGS;
3130 AV *state = (AV *)S_GENSUB_ARG;
3131 SV *coro = av_pop (state);
3132 SV *data_sv = newSV (sizeof (struct io_state));
3133
3134 av_extend (state, items - 1);
3135
3136 sv_upgrade (data_sv, SVt_PV);
3137 SvCUR_set (data_sv, sizeof (struct io_state));
3138 SvPOK_only (data_sv);
3139
3140 {
3141 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3142
3143 data->errorno = errno;
3144 data->laststype = PL_laststype;
3145 data->laststatval = PL_laststatval;
3146 data->statcache = PL_statcache;
3147 }
3148
3149 /* now build the result vector out of all the parameters and the data_sv */
3150 {
3151 int i;
3152
3153 for (i = 0; i < items; ++i)
3154 av_push (state, SvREFCNT_inc_NN (ST (i)));
3155 }
3156
3157 av_push (state, data_sv);
3158
3159 api_ready (aTHX_ coro);
3160 SvREFCNT_dec (coro);
3161 SvREFCNT_dec ((AV *)state);
3162}
3163
3164static int
3165slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3166{
3167 AV *state = (AV *)frame->data;
3168
3169 /* if we are about to throw, return early */
3170 /* this does not cancel the aio request, but at least */
3171 /* it quickly returns */
3172 if (CORO_THROW)
3173 return 0;
3174
3175 /* one element that is an RV? repeat! */
3176 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3177 return 1;
3178
3179 /* restore status */
3180 {
3181 SV *data_sv = av_pop (state);
3182 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3183
3184 errno = data->errorno;
3185 PL_laststype = data->laststype;
3186 PL_laststatval = data->laststatval;
3187 PL_statcache = data->statcache;
3188
3189 SvREFCNT_dec (data_sv);
3190 }
3191
3192 /* push result values */
3193 {
3194 dSP;
3195 int i;
3196
3197 EXTEND (SP, AvFILLp (state) + 1);
3198 for (i = 0; i <= AvFILLp (state); ++i)
3199 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3200
3201 PUTBACK;
3202 }
3203
3204 return 0;
3205}
3206
3207static void
3208slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3209{
3210 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3211 SV *coro_hv = SvRV (coro_current);
3212 struct coro *coro = SvSTATE_hv (coro_hv);
3213
3214 /* put our coroutine id on the state arg */
3215 av_push (state, SvREFCNT_inc_NN (coro_hv));
3216
3217 /* first see whether we have a non-zero priority and set it as AIO prio */
3218 if (coro->prio)
3219 {
3220 dSP;
3221
3222 static SV *prio_cv;
3223 static SV *prio_sv;
3224
3225 if (ecb_expect_false (!prio_cv))
3226 {
3227 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3228 prio_sv = newSViv (0);
3229 }
3230
3231 PUSHMARK (SP);
3232 sv_setiv (prio_sv, coro->prio);
3233 XPUSHs (prio_sv);
3234
3235 PUTBACK;
3236 call_sv (prio_cv, G_VOID | G_DISCARD);
3237 }
3238
3239 /* now call the original request */
3240 {
3241 dSP;
3242 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3243 int i;
3244
3245 PUSHMARK (SP);
3246
3247 /* first push all args to the stack */
3248 EXTEND (SP, items + 1);
3249
3250 for (i = 0; i < items; ++i)
3251 PUSHs (arg [i]);
3252
3253 /* now push the callback closure */
3254 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3255
3256 /* now call the AIO function - we assume our request is uncancelable */
3257 PUTBACK;
3258 call_sv ((SV *)req, G_VOID | G_DISCARD);
3259 }
3260
3261 /* now that the request is going, we loop till we have a result */
3262 frame->data = (void *)state;
3263 frame->prepare = prepare_schedule;
3264 frame->check = slf_check_aio_req;
3265}
3266
3267static void
3268coro_aio_req_xs (pTHX_ CV *cv)
3269{
3270 dXSARGS;
3271
3272 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3273
3274 XSRETURN_EMPTY;
3275}
3276
3277/*****************************************************************************/
3278
3279#if CORO_CLONE
3280# include "clone.c"
3281#endif
3282
3283/*****************************************************************************/
3284
3285static SV *
3286coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3287{
3288 SV *coro_sv;
3289 struct coro *coro;
3290 MAGIC *mg;
3291 HV *hv;
3292 SV *cb;
3293 int i;
3294
3295 if (argc > 0)
3296 {
3297 cb = s_get_cv_croak (argv [0]);
3298
3299 if (!is_coro)
3300 {
3301 if (CvISXSUB (cb))
3302 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3303
3304 if (!CvROOT (cb))
3305 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3306 }
3307 }
3308
3309 Newz (0, coro, 1, struct coro);
3310 coro->args = newAV ();
3311 coro->flags = CF_NEW;
3312
3313 if (coro_first) coro_first->prev = coro;
3314 coro->next = coro_first;
3315 coro_first = coro;
3316
3317 coro->hv = hv = newHV ();
3318 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3319 mg->mg_flags |= MGf_DUP;
3320 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3321
3322 if (argc > 0)
3323 {
3324 av_extend (coro->args, argc + is_coro - 1);
3325
3326 if (is_coro)
3327 {
3328 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3329 cb = (SV *)cv_coro_run;
3330 }
3331
3332 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3333
3334 for (i = 1; i < argc; i++)
3335 av_push (coro->args, newSVsv (argv [i]));
3336 }
3337
3338 return coro_sv;
3339}
3340
3341#ifndef __cplusplus
3342ecb_cold XS(boot_Coro__State);
3343#endif
3344
3345#if CORO_JIT
3346
3347static void ecb_noinline ecb_cold
3348pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3349{
3350 dSP;
3351 AV *av = newAV ();
3352
3353 av_store (av, 3, newSVuv (d));
3354 av_store (av, 2, newSVuv (c));
3355 av_store (av, 1, newSVuv (b));
3356 av_store (av, 0, newSVuv (a));
3357
3358 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3359
3360 PUTBACK;
3361}
3362
3363static void ecb_noinline ecb_cold
3364jit_init (pTHX)
3365{
3366 dSP;
3367 SV *load, *save;
3368 char *map_base;
3369 char *load_ptr, *save_ptr;
3370 STRLEN load_len, save_len, map_len;
3371 int count;
3372
3373 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3374
3375 PUSHMARK (SP);
3376#define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3377# include "state.h"
3378#undef VARx
3379 count = call_pv ("Coro::State::_jit", G_ARRAY);
3380 SPAGAIN;
3381
3382 save = POPs; save_ptr = SvPVbyte (save, save_len);
3383 load = POPs; load_ptr = SvPVbyte (load, load_len);
3384
3385 map_len = load_len + save_len + 16;
3386
3387 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3388
3389 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3390
3391 load_perl_slots = (load_save_perl_slots_type)map_base;
3392 memcpy (map_base, load_ptr, load_len);
3393
3394 map_base += (load_len + 15) & ~15;
3395
3396 save_perl_slots = (load_save_perl_slots_type)map_base;
3397 memcpy (map_base, save_ptr, save_len);
3398
3399 /* we are good citizens and try to make the page read-only, so the evil evil */
3400 /* hackers might have it a bit more difficult */
3401 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3402
3403 PUTBACK;
3404 eval_pv ("undef &Coro::State::_jit", 1);
3405}
3406
3407#endif
1374 3408
1375MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 3409MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1376 3410
1377PROTOTYPES: DISABLE 3411PROTOTYPES: DISABLE
1378 3412
1379BOOT: 3413BOOT:
1380{ 3414{
1381#ifdef USE_ITHREADS 3415#ifdef USE_ITHREADS
1382 MUTEX_INIT (&coro_mutex); 3416# if CORO_PTHREAD
3417 coro_thx = PERL_GET_CONTEXT;
3418# endif
1383#endif 3419#endif
1384 BOOT_PAGESIZE; 3420 BOOT_PAGESIZE;
1385 3421
3422 /* perl defines these to check for existance first, but why it doesn't */
3423 /* just create them one at init time is not clear to me, except for */
3424 /* programs trying to delete them, but... */
3425 /* anyway, we declare this as invalid and make sure they are initialised here */
3426 DEFSV;
3427 ERRSV;
3428
3429 cctx_current = cctx_new_empty ();
3430
1386 irsgv = gv_fetchpv ("/", 1, SVt_PV); 3431 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3432 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3433
3434 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3435 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3436 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3437
3438 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3439 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3440 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1387 3441
1388 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3442 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1389 3443
1390 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE)); 3444 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1391 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB)); 3445 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
… …
1396 main_top_env = PL_top_env; 3450 main_top_env = PL_top_env;
1397 3451
1398 while (main_top_env->je_prev) 3452 while (main_top_env->je_prev)
1399 main_top_env = main_top_env->je_prev; 3453 main_top_env = main_top_env->je_prev;
1400 3454
3455 {
3456 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3457
3458 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3459 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3460
3461 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3462 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3463 }
3464
1401 coroapi.ver = CORO_API_VERSION; 3465 coroapi.ver = CORO_API_VERSION;
3466 coroapi.rev = CORO_API_REVISION;
3467
1402 coroapi.transfer = api_transfer; 3468 coroapi.transfer = api_transfer;
1403 3469
3470 coroapi.sv_state = SvSTATE_;
3471 coroapi.execute_slf = api_execute_slf;
3472 coroapi.prepare_nop = prepare_nop;
3473 coroapi.prepare_schedule = prepare_schedule;
3474 coroapi.prepare_cede = prepare_cede;
3475 coroapi.prepare_cede_notself = prepare_cede_notself;
3476
3477 time_init (aTHX);
3478
1404 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3479 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3480#if CORO_JIT
3481 PUTBACK;
3482 jit_init (aTHX);
3483 SPAGAIN;
3484#endif
1405} 3485}
1406 3486
1407SV * 3487SV *
1408new (char *klass, ...) 3488new (SV *klass, ...)
3489 ALIAS:
3490 Coro::new = 1
1409 CODE: 3491 CODE:
1410{ 3492 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1411 struct coro *coro;
1412 HV *hv;
1413 int i;
1414
1415 Newz (0, coro, 1, struct coro);
1416 coro->args = newAV ();
1417 coro->flags = CF_NEW;
1418
1419 if (coro_first) coro_first->prev = coro;
1420 coro->next = coro_first;
1421 coro_first = coro;
1422
1423 coro->hv = hv = newHV ();
1424 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1425 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1426
1427 for (i = 1; i < items; i++)
1428 av_push (coro->args, newSVsv (ST (i)));
1429}
1430 OUTPUT:
1431 RETVAL
1432
1433# these not obviously related functions are all rolled into the same xs
1434# function to increase chances that they all will call transfer with the same
1435# stack offset
1436void
1437_set_stacklevel (...)
1438 ALIAS:
1439 Coro::State::transfer = 1
1440 Coro::schedule = 2
1441 Coro::cede = 3
1442 Coro::cede_notself = 4
1443 CODE:
1444{
1445 struct transfer_args ta;
1446
1447 switch (ix)
1448 {
1449 case 0:
1450 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1451 ta.next = 0;
1452 break;
1453
1454 case 1:
1455 if (items != 2)
1456 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1457
1458 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1459 break;
1460
1461 case 2:
1462 prepare_schedule (aTHX_ &ta);
1463 break;
1464
1465 case 3:
1466 prepare_cede (aTHX_ &ta);
1467 break;
1468
1469 case 4:
1470 if (!prepare_cede_notself (aTHX_ &ta))
1471 XSRETURN_EMPTY;
1472
1473 break;
1474 }
1475
1476 BARRIER;
1477 TRANSFER (ta);
1478
1479 if (GIMME_V != G_VOID && ta.next != ta.prev)
1480 XSRETURN_YES;
1481}
1482
1483bool
1484_destroy (SV *coro_sv)
1485 CODE:
1486 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1487 OUTPUT: 3493 OUTPUT:
1488 RETVAL 3494 RETVAL
1489 3495
1490void 3496void
3497transfer (...)
3498 PROTOTYPE: $$
3499 CODE:
3500 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3501
3502void
1491_exit (code) 3503_exit (int code)
1492 int code
1493 PROTOTYPE: $ 3504 PROTOTYPE: $
1494 CODE: 3505 CODE:
1495 _exit (code); 3506 _exit (code);
1496 3507
3508SV *
3509clone (Coro::State coro)
3510 CODE:
3511{
3512#if CORO_CLONE
3513 struct coro *ncoro = coro_clone (aTHX_ coro);
3514 MAGIC *mg;
3515 /* TODO: too much duplication */
3516 ncoro->hv = newHV ();
3517 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3518 mg->mg_flags |= MGf_DUP;
3519 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3520#else
3521 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3522#endif
3523}
3524 OUTPUT:
3525 RETVAL
3526
1497int 3527int
1498cctx_stacksize (int new_stacksize = 0) 3528cctx_stacksize (int new_stacksize = 0)
3529 PROTOTYPE: ;$
1499 CODE: 3530 CODE:
1500 RETVAL = coro_stacksize; 3531 RETVAL = cctx_stacksize;
1501 if (new_stacksize) 3532 if (new_stacksize)
3533 {
1502 coro_stacksize = new_stacksize; 3534 cctx_stacksize = new_stacksize;
3535 ++cctx_gen;
3536 }
1503 OUTPUT: 3537 OUTPUT:
1504 RETVAL 3538 RETVAL
1505 3539
1506int 3540int
3541cctx_max_idle (int max_idle = 0)
3542 PROTOTYPE: ;$
3543 CODE:
3544 RETVAL = cctx_max_idle;
3545 if (max_idle > 1)
3546 cctx_max_idle = max_idle;
3547 OUTPUT:
3548 RETVAL
3549
3550int
1507cctx_count () 3551cctx_count ()
3552 PROTOTYPE:
1508 CODE: 3553 CODE:
1509 RETVAL = cctx_count; 3554 RETVAL = cctx_count;
1510 OUTPUT: 3555 OUTPUT:
1511 RETVAL 3556 RETVAL
1512 3557
1513int 3558int
1514cctx_idle () 3559cctx_idle ()
3560 PROTOTYPE:
1515 CODE: 3561 CODE:
1516 RETVAL = cctx_idle; 3562 RETVAL = cctx_idle;
1517 OUTPUT: 3563 OUTPUT:
1518 RETVAL 3564 RETVAL
1519 3565
1520void 3566void
1521list () 3567list ()
3568 PROTOTYPE:
1522 PPCODE: 3569 PPCODE:
1523{ 3570{
1524 struct coro *coro; 3571 struct coro *coro;
1525 for (coro = coro_first; coro; coro = coro->next) 3572 for (coro = coro_first; coro; coro = coro->next)
1526 if (coro->hv) 3573 if (coro->hv)
… …
1531call (Coro::State coro, SV *coderef) 3578call (Coro::State coro, SV *coderef)
1532 ALIAS: 3579 ALIAS:
1533 eval = 1 3580 eval = 1
1534 CODE: 3581 CODE:
1535{ 3582{
1536 if (coro->mainstack) 3583 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1537 { 3584 {
1538 struct coro temp; 3585 struct coro *current = SvSTATE_current;
1539 Zero (&temp, 1, struct coro); 3586 struct CoroSLF slf_save;
1540 3587
1541 if (!(coro->flags & CF_RUNNING)) 3588 if (current != coro)
1542 { 3589 {
3590 PUTBACK;
1543 save_perl (aTHX_ &temp); 3591 save_perl (aTHX_ current);
1544 load_perl (aTHX_ coro); 3592 load_perl (aTHX_ coro);
3593 /* the coro is most likely in an active SLF call.
3594 * while not strictly required (the code we execute is
3595 * not allowed to call any SLF functions), it's cleaner
3596 * to reinitialise the slf_frame and restore it later.
3597 * This might one day allow us to actually do SLF calls
3598 * from code executed here.
3599 */
3600 slf_save = slf_frame;
3601 slf_frame.prepare = 0;
3602 SPAGAIN;
1545 } 3603 }
1546 3604
1547 { 3605 PUSHSTACK;
1548 dSP; 3606
1549 ENTER;
1550 SAVETMPS;
1551 PUSHMARK (SP); 3607 PUSHMARK (SP);
1552 PUTBACK; 3608 PUTBACK;
3609
1553 if (ix) 3610 if (ix)
1554 eval_sv (coderef, 0); 3611 eval_sv (coderef, 0);
1555 else 3612 else
1556 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3613 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3614
3615 POPSTACK;
1557 SPAGAIN; 3616 SPAGAIN;
1558 FREETMPS;
1559 LEAVE;
1560 PUTBACK;
1561 }
1562 3617
1563 if (!(coro->flags & CF_RUNNING)) 3618 if (current != coro)
1564 { 3619 {
3620 PUTBACK;
3621 slf_frame = slf_save;
1565 save_perl (aTHX_ coro); 3622 save_perl (aTHX_ coro);
1566 load_perl (aTHX_ &temp); 3623 load_perl (aTHX_ current);
3624 SPAGAIN;
1567 } 3625 }
1568 } 3626 }
1569} 3627}
1570 3628
1571SV * 3629SV *
… …
1573 PROTOTYPE: $ 3631 PROTOTYPE: $
1574 ALIAS: 3632 ALIAS:
1575 is_ready = CF_READY 3633 is_ready = CF_READY
1576 is_running = CF_RUNNING 3634 is_running = CF_RUNNING
1577 is_new = CF_NEW 3635 is_new = CF_NEW
1578 is_destroyed = CF_DESTROYED 3636 is_destroyed = CF_ZOMBIE
3637 is_zombie = CF_ZOMBIE
3638 is_suspended = CF_SUSPENDED
1579 CODE: 3639 CODE:
1580 RETVAL = boolSV (coro->flags & ix); 3640 RETVAL = boolSV (coro->flags & ix);
1581 OUTPUT: 3641 OUTPUT:
1582 RETVAL 3642 RETVAL
1583 3643
1584void 3644void
3645throw (Coro::State self, SV *exception = &PL_sv_undef)
3646 PROTOTYPE: $;$
3647 CODE:
3648{
3649 struct coro *current = SvSTATE_current;
3650 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
3651 SvREFCNT_dec (*exceptionp);
3652 SvGETMAGIC (exception);
3653 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3654}
3655
3656void
1585api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3657api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3658 PROTOTYPE: $;$
3659 C_ARGS: aTHX_ coro, flags
1586 3660
1587SV * 3661SV *
1588has_stack (Coro::State coro) 3662has_cctx (Coro::State coro)
1589 PROTOTYPE: $ 3663 PROTOTYPE: $
1590 CODE: 3664 CODE:
1591 RETVAL = boolSV (!!coro->cctx); 3665 /* maybe manage the running flag differently */
3666 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1592 OUTPUT: 3667 OUTPUT:
1593 RETVAL 3668 RETVAL
1594 3669
1595int 3670int
1596is_traced (Coro::State coro) 3671is_traced (Coro::State coro)
… …
1598 CODE: 3673 CODE:
1599 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3674 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1600 OUTPUT: 3675 OUTPUT:
1601 RETVAL 3676 RETVAL
1602 3677
1603IV 3678UV
1604rss (Coro::State coro) 3679rss (Coro::State coro)
1605 PROTOTYPE: $ 3680 PROTOTYPE: $
1606 ALIAS: 3681 ALIAS:
1607 usecount = 1 3682 usecount = 1
1608 CODE: 3683 CODE:
… …
1612 case 1: RETVAL = coro->usecount; break; 3687 case 1: RETVAL = coro->usecount; break;
1613 } 3688 }
1614 OUTPUT: 3689 OUTPUT:
1615 RETVAL 3690 RETVAL
1616 3691
3692void
3693force_cctx ()
3694 PROTOTYPE:
3695 CODE:
3696 cctx_current->idle_sp = 0;
3697
3698void
3699swap_defsv (Coro::State self)
3700 PROTOTYPE: $
3701 ALIAS:
3702 swap_defav = 1
3703 CODE:
3704 if (!self->slot)
3705 croak ("cannot swap state with coroutine that has no saved state,");
3706 else
3707 {
3708 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3709 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3710
3711 SV *tmp = *src; *src = *dst; *dst = tmp;
3712 }
3713
3714void
3715cancel (Coro::State self)
3716 CODE:
3717 coro_state_destroy (aTHX_ self);
3718
3719SV *
3720enable_times (int enabled = enable_times)
3721 CODE:
3722{
3723 RETVAL = boolSV (enable_times);
3724
3725 if (enabled != enable_times)
3726 {
3727 enable_times = enabled;
3728
3729 coro_times_update ();
3730 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3731 }
3732}
3733 OUTPUT:
3734 RETVAL
3735
3736void
3737times (Coro::State self)
3738 PPCODE:
3739{
3740 struct coro *current = SvSTATE (coro_current);
3741
3742 if (ecb_expect_false (current == self))
3743 {
3744 coro_times_update ();
3745 coro_times_add (SvSTATE (coro_current));
3746 }
3747
3748 EXTEND (SP, 2);
3749 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3750 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3751
3752 if (ecb_expect_false (current == self))
3753 coro_times_sub (SvSTATE (coro_current));
3754}
3755
3756void
3757swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3758 CODE:
3759{
3760 struct coro *current = SvSTATE_current;
3761
3762 if (current == coro)
3763 SWAP_SVS (current);
3764
3765 if (!coro->swap_sv)
3766 coro->swap_sv = newAV ();
3767
3768 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3769 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3770
3771 if (current == coro)
3772 SWAP_SVS (current);
3773}
3774
1617 3775
1618MODULE = Coro::State PACKAGE = Coro 3776MODULE = Coro::State PACKAGE = Coro
1619 3777
1620BOOT: 3778BOOT:
1621{ 3779{
1622 int i;
1623
1624 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE); 3780 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1625 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE); 3781 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3782 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3783 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1626 av_async_pool = get_av ("Coro::async_pool", TRUE); 3784 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3785 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3786 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3787 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1627 3788
1628 coro_current = get_sv ("Coro::current", FALSE); 3789 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1629 SvREADONLY_on (coro_current); 3790 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
1630 3791 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3792 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3793
1631 coro_stash = gv_stashpv ("Coro", TRUE); 3794 coro_stash = gv_stashpv ("Coro", TRUE);
1632 3795
1633 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3796 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1634 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3797 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1635 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3798 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1636 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3799 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1637 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3800 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1638 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3801 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1639
1640 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1641 coro_ready[i] = newAV ();
1642 3802
1643 { 3803 {
1644 SV *sv = perl_get_sv("Coro::API", 1); 3804 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1645 3805
1646 coroapi.schedule = api_schedule; 3806 coroapi.schedule = api_schedule;
3807 coroapi.schedule_to = api_schedule_to;
1647 coroapi.cede = api_cede; 3808 coroapi.cede = api_cede;
1648 coroapi.cede_notself = api_cede_notself; 3809 coroapi.cede_notself = api_cede_notself;
1649 coroapi.ready = api_ready; 3810 coroapi.ready = api_ready;
1650 coroapi.is_ready = api_is_ready; 3811 coroapi.is_ready = api_is_ready;
1651 coroapi.nready = &coro_nready; 3812 coroapi.nready = coro_nready;
1652 coroapi.current = coro_current; 3813 coroapi.current = coro_current;
1653 3814
1654 GCoroAPI = &coroapi; 3815 /*GCoroAPI = &coroapi;*/
1655 sv_setiv (sv, (IV)&coroapi); 3816 sv_setiv (sv, (IV)&coroapi);
1656 SvREADONLY_on (sv); 3817 SvREADONLY_on (sv);
1657 } 3818 }
1658} 3819}
3820
3821SV *
3822async (...)
3823 PROTOTYPE: &@
3824 CODE:
3825 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3826 api_ready (aTHX_ RETVAL);
3827 OUTPUT:
3828 RETVAL
3829
3830void
3831_destroy (Coro::State coro)
3832 CODE:
3833 /* used by the manager thread */
3834 coro_state_destroy (aTHX_ coro);
3835
3836void
3837on_destroy (Coro::State coro, SV *cb)
3838 CODE:
3839 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3840
3841void
3842join (...)
3843 CODE:
3844 CORO_EXECUTE_SLF_XS (slf_init_join);
3845
3846void
3847terminate (...)
3848 CODE:
3849 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3850
3851void
3852cancel (...)
3853 CODE:
3854 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3855
3856int
3857safe_cancel (Coro::State self, ...)
3858 C_ARGS: aTHX_ self, &ST (1), items - 1
3859
3860void
3861schedule (...)
3862 CODE:
3863 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3864
3865void
3866schedule_to (...)
3867 CODE:
3868 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3869
3870void
3871cede_to (...)
3872 CODE:
3873 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3874
3875void
3876cede (...)
3877 CODE:
3878 CORO_EXECUTE_SLF_XS (slf_init_cede);
3879
3880void
3881cede_notself (...)
3882 CODE:
3883 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1659 3884
1660void 3885void
1661_set_current (SV *current) 3886_set_current (SV *current)
1662 PROTOTYPE: $ 3887 PROTOTYPE: $
1663 CODE: 3888 CODE:
1664 SvREFCNT_dec (SvRV (coro_current)); 3889 SvREFCNT_dec (SvRV (coro_current));
1665 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3890 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3891
3892void
3893_set_readyhook (SV *hook)
3894 PROTOTYPE: $
3895 CODE:
3896 SvREFCNT_dec (coro_readyhook);
3897 SvGETMAGIC (hook);
3898 if (SvOK (hook))
3899 {
3900 coro_readyhook = newSVsv (hook);
3901 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3902 }
3903 else
3904 {
3905 coro_readyhook = 0;
3906 CORO_READYHOOK = 0;
3907 }
1666 3908
1667int 3909int
1668prio (Coro::State coro, int newprio = 0) 3910prio (Coro::State coro, int newprio = 0)
3911 PROTOTYPE: $;$
1669 ALIAS: 3912 ALIAS:
1670 nice = 1 3913 nice = 1
1671 CODE: 3914 CODE:
1672{ 3915{
1673 RETVAL = coro->prio; 3916 RETVAL = coro->prio;
… …
1675 if (items > 1) 3918 if (items > 1)
1676 { 3919 {
1677 if (ix) 3920 if (ix)
1678 newprio = coro->prio - newprio; 3921 newprio = coro->prio - newprio;
1679 3922
1680 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3923 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1681 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3924 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1682 3925
1683 coro->prio = newprio; 3926 coro->prio = newprio;
1684 } 3927 }
1685} 3928}
1686 OUTPUT: 3929 OUTPUT:
… …
1688 3931
1689SV * 3932SV *
1690ready (SV *self) 3933ready (SV *self)
1691 PROTOTYPE: $ 3934 PROTOTYPE: $
1692 CODE: 3935 CODE:
1693 RETVAL = boolSV (api_ready (self)); 3936 RETVAL = boolSV (api_ready (aTHX_ self));
1694 OUTPUT: 3937 OUTPUT:
1695 RETVAL 3938 RETVAL
1696 3939
1697int 3940int
1698nready (...) 3941nready (...)
… …
1700 CODE: 3943 CODE:
1701 RETVAL = coro_nready; 3944 RETVAL = coro_nready;
1702 OUTPUT: 3945 OUTPUT:
1703 RETVAL 3946 RETVAL
1704 3947
1705# for async_pool speedup
1706void 3948void
1707_pool_1 (SV *cb) 3949suspend (Coro::State self)
3950 PROTOTYPE: $
1708 CODE: 3951 CODE:
1709{ 3952 self->flags |= CF_SUSPENDED;
1710 int i, len;
1711 HV *hv = (HV *)SvRV (coro_current);
1712 AV *defav = GvAV (PL_defgv);
1713 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1714 AV *invoke_av;
1715 3953
1716 if (!invoke) 3954void
1717 croak ("\3terminate\2\n"); 3955resume (Coro::State self)
3956 PROTOTYPE: $
3957 CODE:
3958 self->flags &= ~CF_SUSPENDED;
1718 3959
1719 hv_store (hv, "desc", sizeof ("desc") - 1, 3960void
1720 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 3961_pool_handler (...)
3962 CODE:
3963 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1721 3964
1722 invoke_av = (AV *)SvRV (invoke); 3965void
1723 len = av_len (invoke_av); 3966async_pool (SV *cv, ...)
3967 PROTOTYPE: &@
3968 PPCODE:
3969{
3970 HV *hv = (HV *)av_pop (av_async_pool);
3971 AV *av = newAV ();
3972 SV *cb = ST (0);
3973 int i;
1724 3974
1725 sv_setsv (cb, AvARRAY (invoke_av)[0]); 3975 av_extend (av, items - 2);
3976 for (i = 1; i < items; ++i)
3977 av_push (av, SvREFCNT_inc_NN (ST (i)));
1726 3978
1727 if (len > 0) 3979 if ((SV *)hv == &PL_sv_undef)
1728 { 3980 {
1729 av_fill (defav, len - 1); 3981 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
1730 for (i = 0; i < len; ++i) 3982 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
1731 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 3983 SvREFCNT_dec (sv);
1732 } 3984 }
1733 3985
3986 {
3987 struct coro *coro = SvSTATE_hv (hv);
3988
3989 assert (!coro->invoke_cb);
3990 assert (!coro->invoke_av);
3991 coro->invoke_cb = SvREFCNT_inc (cb);
3992 coro->invoke_av = av;
3993 }
3994
3995 api_ready (aTHX_ (SV *)hv);
3996
3997 if (GIMME_V != G_VOID)
3998 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3999 else
1734 SvREFCNT_dec (invoke); 4000 SvREFCNT_dec (hv);
1735} 4001}
1736 4002
1737void 4003SV *
1738_pool_2 (SV *cb) 4004rouse_cb ()
4005 PROTOTYPE:
1739 CODE: 4006 CODE:
1740{ 4007 RETVAL = coro_new_rouse_cb (aTHX);
1741 struct coro *coro = SvSTATE (coro_current);
1742
1743 sv_setsv (cb, &PL_sv_undef);
1744
1745 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1746 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1747 croak ("\3terminate\2\n");
1748
1749 av_clear (GvAV (PL_defgv));
1750 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1751 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1752
1753 coro->prio = 0;
1754
1755 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1756 api_trace (coro_current, 0);
1757
1758 av_push (av_async_pool, newSVsv (coro_current));
1759}
1760
1761
1762MODULE = Coro::State PACKAGE = Coro::AIO
1763
1764SV *
1765_get_state ()
1766 CODE:
1767{
1768 struct io_state *data;
1769
1770 RETVAL = newSV (sizeof (struct io_state));
1771 data = (struct io_state *)SvPVX (RETVAL);
1772 SvCUR_set (RETVAL, sizeof (struct io_state));
1773 SvPOK_only (RETVAL);
1774
1775 data->errorno = errno;
1776 data->laststype = PL_laststype;
1777 data->laststatval = PL_laststatval;
1778 data->statcache = PL_statcache;
1779}
1780 OUTPUT: 4008 OUTPUT:
1781 RETVAL 4009 RETVAL
1782 4010
1783void 4011void
1784_set_state (char *data_) 4012rouse_wait (...)
4013 PROTOTYPE: ;$
4014 PPCODE:
4015 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4016
4017void
4018on_enter (SV *block)
4019 ALIAS:
4020 on_leave = 1
1785 PROTOTYPE: $ 4021 PROTOTYPE: &
1786 CODE: 4022 CODE:
1787{ 4023{
1788 struct io_state *data = (void *)data_; 4024 struct coro *coro = SvSTATE_current;
4025 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1789 4026
1790 errno = data->errorno; 4027 block = s_get_cv_croak (block);
1791 PL_laststype = data->laststype;
1792 PL_laststatval = data->laststatval;
1793 PL_statcache = data->statcache;
1794}
1795 4028
4029 if (!*avp)
4030 *avp = newAV ();
4031
4032 av_push (*avp, SvREFCNT_inc (block));
4033
4034 if (!ix)
4035 on_enterleave_call (aTHX_ block);
4036
4037 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4038 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4039 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4040}
4041
4042
4043MODULE = Coro::State PACKAGE = PerlIO::cede
4044
4045BOOT:
4046 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4047
4048
4049MODULE = Coro::State PACKAGE = Coro::Semaphore
4050
4051SV *
4052new (SV *klass, SV *count = 0)
4053 CODE:
4054{
4055 int semcnt = 1;
4056
4057 if (count)
4058 {
4059 SvGETMAGIC (count);
4060
4061 if (SvOK (count))
4062 semcnt = SvIV (count);
4063 }
4064
4065 RETVAL = sv_bless (
4066 coro_waitarray_new (aTHX_ semcnt),
4067 GvSTASH (CvGV (cv))
4068 );
4069}
4070 OUTPUT:
4071 RETVAL
4072
4073# helper for Coro::Channel and others
4074SV *
4075_alloc (int count)
4076 CODE:
4077 RETVAL = coro_waitarray_new (aTHX_ count);
4078 OUTPUT:
4079 RETVAL
4080
4081SV *
4082count (SV *self)
4083 CODE:
4084 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4085 OUTPUT:
4086 RETVAL
4087
4088void
4089up (SV *self, int adjust = 1)
4090 ALIAS:
4091 adjust = 1
4092 CODE:
4093 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4094
4095void
4096down (...)
4097 CODE:
4098 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4099
4100void
4101wait (...)
4102 CODE:
4103 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4104
4105void
4106try (SV *self)
4107 PPCODE:
4108{
4109 AV *av = (AV *)SvRV (self);
4110 SV *count_sv = AvARRAY (av)[0];
4111 IV count = SvIVX (count_sv);
4112
4113 if (count > 0)
4114 {
4115 --count;
4116 SvIVX (count_sv) = count;
4117 XSRETURN_YES;
4118 }
4119 else
4120 XSRETURN_NO;
4121}
4122
4123void
4124waiters (SV *self)
4125 PPCODE:
4126{
4127 AV *av = (AV *)SvRV (self);
4128 int wcount = AvFILLp (av) + 1 - 1;
4129
4130 if (GIMME_V == G_SCALAR)
4131 XPUSHs (sv_2mortal (newSViv (wcount)));
4132 else
4133 {
4134 int i;
4135 EXTEND (SP, wcount);
4136 for (i = 1; i <= wcount; ++i)
4137 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4138 }
4139}
4140
4141MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4142
4143void
4144_may_delete (SV *sem, int count, unsigned int extra_refs)
4145 PPCODE:
4146{
4147 AV *av = (AV *)SvRV (sem);
4148
4149 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4150 && AvFILLp (av) == 0 /* no waiters, just count */
4151 && SvIV (AvARRAY (av)[0]) == count)
4152 XSRETURN_YES;
4153
4154 XSRETURN_NO;
4155}
4156
4157MODULE = Coro::State PACKAGE = Coro::Signal
4158
4159SV *
4160new (SV *klass)
4161 CODE:
4162 RETVAL = sv_bless (
4163 coro_waitarray_new (aTHX_ 0),
4164 GvSTASH (CvGV (cv))
4165 );
4166 OUTPUT:
4167 RETVAL
4168
4169void
4170wait (...)
4171 CODE:
4172 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4173
4174void
4175broadcast (SV *self)
4176 CODE:
4177{
4178 AV *av = (AV *)SvRV (self);
4179 coro_signal_wake (aTHX_ av, AvFILLp (av));
4180}
4181
4182void
4183send (SV *self)
4184 CODE:
4185{
4186 AV *av = (AV *)SvRV (self);
4187
4188 if (AvFILLp (av))
4189 coro_signal_wake (aTHX_ av, 1);
4190 else
4191 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4192}
4193
4194IV
4195awaited (SV *self)
4196 CODE:
4197 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4198 OUTPUT:
4199 RETVAL
4200
4201
4202MODULE = Coro::State PACKAGE = Coro::AnyEvent
4203
4204BOOT:
4205 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4206
4207void
4208_schedule (...)
4209 CODE:
4210{
4211 static int incede;
4212
4213 api_cede_notself (aTHX);
4214
4215 ++incede;
4216 while (coro_nready >= incede && api_cede (aTHX))
4217 ;
4218
4219 sv_setsv (sv_activity, &PL_sv_undef);
4220 if (coro_nready >= incede)
4221 {
4222 PUSHMARK (SP);
4223 PUTBACK;
4224 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4225 }
4226
4227 --incede;
4228}
4229
4230
4231MODULE = Coro::State PACKAGE = Coro::AIO
4232
4233void
4234_register (char *target, char *proto, SV *req)
4235 CODE:
4236{
4237 SV *req_cv = s_get_cv_croak (req);
4238 /* newXSproto doesn't return the CV on 5.8 */
4239 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4240 sv_setpv ((SV *)slf_cv, proto);
4241 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4242}
4243
4244MODULE = Coro::State PACKAGE = Coro::Select
4245
4246void
4247patch_pp_sselect ()
4248 CODE:
4249 if (!coro_old_pp_sselect)
4250 {
4251 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4252 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4253 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4254 }
4255
4256void
4257unpatch_pp_sselect ()
4258 CODE:
4259 if (coro_old_pp_sselect)
4260 {
4261 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4262 coro_old_pp_sselect = 0;
4263 }
4264

Diff Legend

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