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Comparing Coro/Coro/State.xs (file contents):
Revision 1.191 by root, Fri Oct 5 20:47:49 2007 UTC vs.
Revision 1.394 by root, Sat Apr 30 05:17:43 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"
10 17
11#include <stdio.h> 18#include <stdio.h>
12#include <errno.h> 19#include <errno.h>
13#include <assert.h> 20#include <assert.h>
21
22#ifndef SVs_PADSTALE
23# define SVs_PADSTALE 0
24#endif
25
26#if defined(_WIN32)
27# undef HAS_GETTIMEOFDAY
28# undef setjmp
29# undef longjmp
30# undef _exit
31# define setjmp _setjmp /* deep magic */
32#else
33# include <inttypes.h> /* most portable stdint.h */
34#endif
14 35
15#ifdef HAVE_MMAP 36#ifdef HAVE_MMAP
16# include <unistd.h> 37# include <unistd.h>
17# include <sys/mman.h> 38# include <sys/mman.h>
18# ifndef MAP_ANONYMOUS 39# ifndef MAP_ANONYMOUS
… …
35# define BOOT_PAGESIZE (void)0 56# define BOOT_PAGESIZE (void)0
36#endif 57#endif
37 58
38#if CORO_USE_VALGRIND 59#if CORO_USE_VALGRIND
39# include <valgrind/valgrind.h> 60# 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 61#endif
44 62
45/* the maximum number of idle cctx that will be pooled */ 63/* the maximum number of idle cctx that will be pooled */
46#define MAX_IDLE_CCTX 8 64static 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
80/* 5.8.8 */
81#ifndef GV_NOTQUAL
82# define GV_NOTQUAL 0
83#endif
84#ifndef newSV
85# define newSV(l) NEWSV(0,l)
86#endif
87 65
88#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 66#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
89# undef CORO_STACKGUARD 67# undef CORO_STACKGUARD
90#endif 68#endif
91 69
… …
98# define CORO_PREFER_PERL_FUNCTIONS 0 76# define CORO_PREFER_PERL_FUNCTIONS 0
99#endif 77#endif
100 78
101/* The next macros try to return the current stack pointer, in an as 79/* The next macros try to return the current stack pointer, in an as
102 * portable way as possible. */ 80 * portable way as possible. */
81#if __GNUC__ >= 4
82# define dSTACKLEVEL int stacklevel_dummy
83# define STACKLEVEL __builtin_frame_address (0)
84#else
103#define dSTACKLEVEL volatile char stacklevel 85# define dSTACKLEVEL volatile void *stacklevel
104#define STACKLEVEL ((void *)&stacklevel) 86# define STACKLEVEL ((void *)&stacklevel)
87#endif
105 88
106#define IN_DESTRUCT (PL_main_cv == Nullcv) 89#define IN_DESTRUCT PL_dirty
107 90
108#if __GNUC__ >= 3 91#if __GNUC__ >= 3
109# define attribute(x) __attribute__(x) 92# define attribute(x) __attribute__(x)
110# define BARRIER __asm__ __volatile__ ("" : : : "memory") 93# define expect(expr,value) __builtin_expect ((expr), (value))
94# define INLINE static inline
111#else 95#else
112# define attribute(x) 96# define attribute(x)
113# define BARRIER 97# define expect(expr,value) (expr)
98# define INLINE static
114#endif 99#endif
115 100
101#define expect_false(expr) expect ((expr) != 0, 0)
102#define expect_true(expr) expect ((expr) != 0, 1)
103
116#define NOINLINE attribute ((noinline)) 104#define NOINLINE attribute ((noinline))
117 105
118#include "CoroAPI.h" 106#include "CoroAPI.h"
107#define GCoroAPI (&coroapi) /* very sneaky */
119 108
120#ifdef USE_ITHREADS 109#ifdef USE_ITHREADS
121static perl_mutex coro_mutex; 110# if CORO_PTHREAD
122# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 111static void *coro_thx;
123# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 112# endif
124#else
125# define LOCK (void)0
126# define UNLOCK (void)0
127#endif 113#endif
128 114
129/* helper storage struct for Coro::AIO */ 115#ifdef __linux
130struct io_state 116# include <time.h> /* for timespec */
131{ 117# include <syscall.h> /* for SYS_* */
132 int errorno; 118# ifdef SYS_clock_gettime
133 I32 laststype; 119# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
134 int laststatval; 120# define CORO_CLOCK_MONOTONIC 1
135 Stat_t statcache; 121# define CORO_CLOCK_THREAD_CPUTIME_ID 3
136}; 122# endif
123#endif
137 124
125static double (*nvtime)(); /* so why doesn't it take void? */
126static void (*u2time)(pTHX_ UV ret[2]);
127
128/* we hijack an hopefully unused CV flag for our purposes */
129#define CVf_SLF 0x4000
130static OP *pp_slf (pTHX);
131
132static U32 cctx_gen;
138static size_t coro_stacksize = CORO_STACKSIZE; 133static size_t cctx_stacksize = CORO_STACKSIZE;
139static struct CoroAPI coroapi; 134static struct CoroAPI coroapi;
140static AV *main_mainstack; /* used to differentiate between $main and others */ 135static AV *main_mainstack; /* used to differentiate between $main and others */
141static JMPENV *main_top_env; 136static JMPENV *main_top_env;
142static HV *coro_state_stash, *coro_stash; 137static HV *coro_state_stash, *coro_stash;
143static SV *coro_mortal; /* will be freed after next transfer */ 138static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
139
140static AV *av_destroy; /* destruction queue */
141static SV *sv_manager; /* the manager coro */
142static SV *sv_idle; /* $Coro::idle */
144 143
145static GV *irsgv; /* $/ */ 144static GV *irsgv; /* $/ */
146static GV *stdoutgv; /* *STDOUT */ 145static GV *stdoutgv; /* *STDOUT */
146static SV *rv_diehook;
147static SV *rv_warnhook;
148static HV *hv_sig; /* %SIG */
147 149
148/* async_pool helper stuff */ 150/* async_pool helper stuff */
149static SV *sv_pool_rss; 151static SV *sv_pool_rss;
150static SV *sv_pool_size; 152static SV *sv_pool_size;
153static SV *sv_async_pool_idle; /* description string */
151static AV *av_async_pool; 154static AV *av_async_pool; /* idle pool */
155static SV *sv_Coro; /* class string */
156static CV *cv_pool_handler;
157
158/* Coro::AnyEvent */
159static SV *sv_activity;
160
161/* enable processtime/realtime profiling */
162static char enable_times;
163typedef U32 coro_ts[2];
164static coro_ts time_real, time_cpu;
165static char times_valid;
152 166
153static struct coro_cctx *cctx_first; 167static struct coro_cctx *cctx_first;
154static int cctx_count, cctx_idle; 168static int cctx_count, cctx_idle;
155 169
156enum { 170enum {
… …
161 CC_TRACE_LINE = 0x10, /* trace each statement */ 175 CC_TRACE_LINE = 0x10, /* trace each statement */
162 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 176 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
163}; 177};
164 178
165/* this is a structure representing a c-level coroutine */ 179/* this is a structure representing a c-level coroutine */
166typedef struct coro_cctx { 180typedef struct coro_cctx
181{
167 struct coro_cctx *next; 182 struct coro_cctx *next;
168 183
169 /* the stack */ 184 /* the stack */
170 void *sptr; 185 void *sptr;
171 size_t ssize; 186 size_t ssize;
… …
174 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 189 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
175 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 190 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
176 JMPENV *top_env; 191 JMPENV *top_env;
177 coro_context cctx; 192 coro_context cctx;
178 193
194 U32 gen;
179#if CORO_USE_VALGRIND 195#if CORO_USE_VALGRIND
180 int valgrind_id; 196 int valgrind_id;
181#endif 197#endif
182 unsigned char flags; 198 unsigned char flags;
183} coro_cctx; 199} coro_cctx;
184 200
201static coro_cctx *cctx_current; /* the currently running cctx */
202
203/*****************************************************************************/
204
185enum { 205enum {
186 CF_RUNNING = 0x0001, /* coroutine is running */ 206 CF_RUNNING = 0x0001, /* coroutine is running */
187 CF_READY = 0x0002, /* coroutine is ready */ 207 CF_READY = 0x0002, /* coroutine is ready */
188 CF_NEW = 0x0004, /* has never been switched to */ 208 CF_NEW = 0x0004, /* has never been switched to */
189 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 209 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
210 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
211 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
190}; 212};
191 213
192/* this is a structure representing a perl-level coroutine */ 214/* the structure where most of the perl state is stored, overlaid on the cxstack */
193struct coro { 215typedef struct
194 /* the c coroutine allocated to this perl coroutine, if any */ 216{
195 coro_cctx *cctx; 217 SV *defsv;
196 218 AV *defav;
197 /* data associated with this coroutine (initial args) */ 219 SV *errsv;
198 AV *args; 220 SV *irsgv;
199 int refcnt; 221 HV *hinthv;
200 int flags; /* CF_ flags */
201
202 /* optionally saved, might be zero */
203 AV *defav; /* @_ */
204 SV *defsv; /* $_ */
205 SV *errsv; /* $@ */
206 SV *deffh; /* default filehandle */
207 SV *irssv; /* $/ */
208 SV *irssv_sv; /* real $/ cache */
209
210#define VAR(name,type) type name; 222#define VAR(name,type) type name;
211# include "state.h" 223# include "state.h"
212#undef VAR 224#undef VAR
225} perl_slots;
226
227#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
228
229/* this is a structure representing a perl-level coroutine */
230struct coro {
231 /* the C coroutine allocated to this perl coroutine, if any */
232 coro_cctx *cctx;
233
234 /* ready queue */
235 struct coro *next_ready;
236
237 /* state data */
238 struct CoroSLF slf_frame; /* saved slf frame */
239 AV *mainstack;
240 perl_slots *slot; /* basically the saved sp */
241
242 CV *startcv; /* the CV to execute */
243 AV *args; /* data associated with this coroutine (initial args) */
244 int refcnt; /* coroutines are refcounted, yes */
245 int flags; /* CF_ flags */
246 HV *hv; /* the perl hash associated with this coro, if any */
247 void (*on_destroy)(pTHX_ struct coro *coro); /* for temporary use by xs in critical sections */
213 248
214 /* statistics */ 249 /* statistics */
215 int usecount; /* number of transfers to this coro */ 250 int usecount; /* number of transfers to this coro */
216 251
217 /* coro process data */ 252 /* coro process data */
218 int prio; 253 int prio;
219 //SV *throw; 254 SV *except; /* exception to be thrown */
255 SV *rouse_cb;
220 256
221 /* async_pool */ 257 /* async_pool */
222 SV *saved_deffh; 258 SV *saved_deffh;
259 SV *invoke_cb;
260 AV *invoke_av;
261
262 /* on_enter/on_leave */
263 AV *on_enter;
264 AV *on_leave;
265
266 /* swap_sv */
267 AV *swap_sv;
268
269 /* times */
270 coro_ts t_cpu, t_real;
223 271
224 /* linked list */ 272 /* linked list */
225 struct coro *next, *prev; 273 struct coro *next, *prev;
226 HV *hv; /* the perl hash associated with this coro, if any */
227}; 274};
228 275
229typedef struct coro *Coro__State; 276typedef struct coro *Coro__State;
230typedef struct coro *Coro__State_or_hashref; 277typedef struct coro *Coro__State_or_hashref;
231 278
279/* the following variables are effectively part of the perl context */
280/* and get copied between struct coro and these variables */
281/* the main reason we don't support windows process emulation */
282static struct CoroSLF slf_frame; /* the current slf frame */
283
232/** Coro ********************************************************************/ 284/** Coro ********************************************************************/
233 285
234#define PRIO_MAX 3 286#define CORO_PRIO_MAX 3
235#define PRIO_HIGH 1 287#define CORO_PRIO_HIGH 1
236#define PRIO_NORMAL 0 288#define CORO_PRIO_NORMAL 0
237#define PRIO_LOW -1 289#define CORO_PRIO_LOW -1
238#define PRIO_IDLE -3 290#define CORO_PRIO_IDLE -3
239#define PRIO_MIN -4 291#define CORO_PRIO_MIN -4
240 292
241/* for Coro.pm */ 293/* for Coro.pm */
242static SV *coro_current; 294static SV *coro_current;
243static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 295static SV *coro_readyhook;
244static int coro_nready; 296static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
297static CV *cv_coro_run, *cv_coro_terminate;
245static struct coro *coro_first; 298static struct coro *coro_first;
299#define coro_nready coroapi.nready
300
301/** Coro::Select ************************************************************/
302
303static OP *(*coro_old_pp_sselect) (pTHX);
304static SV *coro_select_select;
305
306/* horrible hack, but if it works... */
307static OP *
308coro_pp_sselect (pTHX)
309{
310 dSP;
311 PUSHMARK (SP - 4); /* fake argument list */
312 XPUSHs (coro_select_select);
313 PUTBACK;
314
315 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
316 PL_op->op_flags |= OPf_STACKED;
317 PL_op->op_private = 0;
318 return PL_ppaddr [OP_ENTERSUB](aTHX);
319}
320
321/** time stuff **************************************************************/
322
323#ifdef HAS_GETTIMEOFDAY
324
325static void
326coro_u2time (pTHX_ UV ret[2])
327{
328 struct timeval tv;
329 gettimeofday (&tv, 0);
330
331 ret [0] = tv.tv_sec;
332 ret [1] = tv.tv_usec;
333}
334
335static double
336coro_nvtime ()
337{
338 struct timeval tv;
339 gettimeofday (&tv, 0);
340
341 return tv.tv_sec + tv.tv_usec * 1e-6;
342}
343
344static void
345time_init (pTHX)
346{
347 nvtime = coro_nvtime;
348 u2time = coro_u2time;
349}
350
351#else
352
353static void
354time_init (pTHX)
355{
356 SV **svp;
357
358 require_pv ("Time/HiRes.pm");
359
360 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
361
362 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
363 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
364
365 nvtime = INT2PTR (double (*)(), SvIV (*svp));
366
367 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
368 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
369}
370
371#endif
246 372
247/** lowlevel stuff **********************************************************/ 373/** lowlevel stuff **********************************************************/
248 374
375static SV *
376coro_get_sv (pTHX_ const char *name, int create)
377{
378#if PERL_VERSION_ATLEAST (5,10,0)
379 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
380 get_sv (name, create);
381#endif
382 return get_sv (name, create);
383}
384
249static AV * 385static AV *
386coro_get_av (pTHX_ const char *name, int create)
387{
388#if PERL_VERSION_ATLEAST (5,10,0)
389 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
390 get_av (name, create);
391#endif
392 return get_av (name, create);
393}
394
395static HV *
396coro_get_hv (pTHX_ const char *name, int create)
397{
398#if PERL_VERSION_ATLEAST (5,10,0)
399 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
400 get_hv (name, create);
401#endif
402 return get_hv (name, create);
403}
404
405INLINE void
406coro_times_update ()
407{
408#ifdef coro_clock_gettime
409 struct timespec ts;
410
411 ts.tv_sec = ts.tv_nsec = 0;
412 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
413 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
414
415 ts.tv_sec = ts.tv_nsec = 0;
416 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
417 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
418#else
419 dTHX;
420 UV tv[2];
421
422 u2time (aTHX_ tv);
423 time_real [0] = tv [0];
424 time_real [1] = tv [1] * 1000;
425#endif
426}
427
428INLINE void
429coro_times_add (struct coro *c)
430{
431 c->t_real [1] += time_real [1];
432 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
433 c->t_real [0] += time_real [0];
434
435 c->t_cpu [1] += time_cpu [1];
436 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
437 c->t_cpu [0] += time_cpu [0];
438}
439
440INLINE void
441coro_times_sub (struct coro *c)
442{
443 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
444 c->t_real [1] -= time_real [1];
445 c->t_real [0] -= time_real [0];
446
447 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
448 c->t_cpu [1] -= time_cpu [1];
449 c->t_cpu [0] -= time_cpu [0];
450}
451
452/*****************************************************************************/
453/* magic glue */
454
455#define CORO_MAGIC_type_cv 26
456#define CORO_MAGIC_type_state PERL_MAGIC_ext
457
458#define CORO_MAGIC_NN(sv, type) \
459 (expect_true (SvMAGIC (sv)->mg_type == type) \
460 ? SvMAGIC (sv) \
461 : mg_find (sv, type))
462
463#define CORO_MAGIC(sv, type) \
464 (expect_true (SvMAGIC (sv)) \
465 ? CORO_MAGIC_NN (sv, type) \
466 : 0)
467
468#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
469#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
470
471INLINE struct coro *
472SvSTATE_ (pTHX_ SV *coro)
473{
474 HV *stash;
475 MAGIC *mg;
476
477 if (SvROK (coro))
478 coro = SvRV (coro);
479
480 if (expect_false (SvTYPE (coro) != SVt_PVHV))
481 croak ("Coro::State object required");
482
483 stash = SvSTASH (coro);
484 if (expect_false (stash != coro_stash && stash != coro_state_stash))
485 {
486 /* very slow, but rare, check */
487 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
488 croak ("Coro::State object required");
489 }
490
491 mg = CORO_MAGIC_state (coro);
492 return (struct coro *)mg->mg_ptr;
493}
494
495#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
496
497/* faster than SvSTATE, but expects a coroutine hv */
498#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
499#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
500
501/*****************************************************************************/
502/* padlist management and caching */
503
504static AV *
250coro_clone_padlist (pTHX_ CV *cv) 505coro_derive_padlist (pTHX_ CV *cv)
251{ 506{
252 AV *padlist = CvPADLIST (cv); 507 AV *padlist = CvPADLIST (cv);
253 AV *newpadlist, *newpad; 508 AV *newpadlist, *newpad;
254 509
255 newpadlist = newAV (); 510 newpadlist = newAV ();
256 AvREAL_off (newpadlist); 511 AvREAL_off (newpadlist);
257#if PERL_VERSION_ATLEAST (5,9,0) 512#if PERL_VERSION_ATLEAST (5,10,0)
258 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 513 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
259#else 514#else
260 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 515 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
261#endif 516#endif
262 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 517 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
263 --AvFILLp (padlist); 518 --AvFILLp (padlist);
264 519
265 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 520 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
266 av_store (newpadlist, 1, (SV *)newpad); 521 av_store (newpadlist, 1, (SV *)newpad);
267 522
268 return newpadlist; 523 return newpadlist;
269} 524}
270 525
271static void 526static void
272free_padlist (pTHX_ AV *padlist) 527free_padlist (pTHX_ AV *padlist)
273{ 528{
274 /* may be during global destruction */ 529 /* may be during global destruction */
275 if (SvREFCNT (padlist)) 530 if (!IN_DESTRUCT)
276 { 531 {
277 I32 i = AvFILLp (padlist); 532 I32 i = AvFILLp (padlist);
278 while (i >= 0) 533
534 while (i > 0) /* special-case index 0 */
279 { 535 {
280 SV **svp = av_fetch (padlist, i--, FALSE); 536 /* we try to be extra-careful here */
281 if (svp) 537 AV *av = (AV *)AvARRAY (padlist)[i--];
282 { 538 I32 j = AvFILLp (av);
283 SV *sv; 539
284 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 540 while (j >= 0)
541 SvREFCNT_dec (AvARRAY (av)[j--]);
542
543 AvFILLp (av) = -1;
285 SvREFCNT_dec (sv); 544 SvREFCNT_dec (av);
286
287 SvREFCNT_dec (*svp);
288 }
289 } 545 }
290 546
547 SvREFCNT_dec (AvARRAY (padlist)[0]);
548
549 AvFILLp (padlist) = -1;
291 SvREFCNT_dec ((SV*)padlist); 550 SvREFCNT_dec ((SV*)padlist);
292 } 551 }
293} 552}
294 553
295static int 554static int
296coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 555coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
297{ 556{
298 AV *padlist; 557 AV *padlist;
299 AV *av = (AV *)mg->mg_obj; 558 AV *av = (AV *)mg->mg_obj;
559
560 /* perl manages to free our internal AV and _then_ call us */
561 if (IN_DESTRUCT)
562 return 0;
300 563
301 /* casting is fun. */ 564 /* casting is fun. */
302 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 565 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
303 free_padlist (aTHX_ padlist); 566 free_padlist (aTHX_ padlist);
304 567
305 SvREFCNT_dec (av); 568 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
306 569
307 return 0; 570 return 0;
308} 571}
309 572
310#define PERL_MAGIC_coro PERL_MAGIC_ext 573static MGVTBL coro_cv_vtbl = {
311 574 0, 0, 0, 0,
312static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 575 coro_cv_free
313 576};
314#define CORO_MAGIC(cv) \
315 SvMAGIC (cv) \
316 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
317 ? SvMAGIC (cv) \
318 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
319 : 0
320
321static struct coro *
322SvSTATE_ (pTHX_ SV *coro)
323{
324 HV *stash;
325 MAGIC *mg;
326
327 if (SvROK (coro))
328 coro = SvRV (coro);
329
330 if (SvTYPE (coro) != SVt_PVHV)
331 croak ("Coro::State object required");
332
333 stash = SvSTASH (coro);
334 if (stash != coro_stash && stash != coro_state_stash)
335 {
336 /* very slow, but rare, check */
337 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
338 croak ("Coro::State object required");
339 }
340
341 mg = CORO_MAGIC (coro);
342 return (struct coro *)mg->mg_ptr;
343}
344
345#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
346 577
347/* the next two functions merely cache the padlists */ 578/* the next two functions merely cache the padlists */
348static void 579static void
349get_padlist (pTHX_ CV *cv) 580get_padlist (pTHX_ CV *cv)
350{ 581{
351 MAGIC *mg = CORO_MAGIC (cv); 582 MAGIC *mg = CORO_MAGIC_cv (cv);
352 AV *av; 583 AV *av;
353 584
354 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 585 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
355 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 586 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
356 else 587 else
357 { 588 {
358#if CORO_PREFER_PERL_FUNCTIONS 589#if CORO_PREFER_PERL_FUNCTIONS
359 /* this is probably cleaner, but also slower? */ 590 /* this is probably cleaner? but also slower! */
591 /* in practise, it seems to be less stable */
360 CV *cp = Perl_cv_clone (cv); 592 CV *cp = Perl_cv_clone (aTHX_ cv);
361 CvPADLIST (cv) = CvPADLIST (cp); 593 CvPADLIST (cv) = CvPADLIST (cp);
362 CvPADLIST (cp) = 0; 594 CvPADLIST (cp) = 0;
363 SvREFCNT_dec (cp); 595 SvREFCNT_dec (cp);
364#else 596#else
365 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 597 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
366#endif 598#endif
367 } 599 }
368} 600}
369 601
370static void 602static void
371put_padlist (pTHX_ CV *cv) 603put_padlist (pTHX_ CV *cv)
372{ 604{
373 MAGIC *mg = CORO_MAGIC (cv); 605 MAGIC *mg = CORO_MAGIC_cv (cv);
374 AV *av; 606 AV *av;
375 607
376 if (!mg) 608 if (expect_false (!mg))
377 { 609 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
378 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
379 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
380 mg->mg_virtual = &vtbl_coro;
381 mg->mg_obj = (SV *)newAV ();
382 }
383 610
384 av = (AV *)mg->mg_obj; 611 av = (AV *)mg->mg_obj;
385 612
386 if (AvFILLp (av) >= AvMAX (av)) 613 if (expect_false (AvFILLp (av) >= AvMAX (av)))
387 av_extend (av, AvMAX (av) + 1); 614 av_extend (av, AvFILLp (av) + 1);
388 615
389 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 616 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
390} 617}
391 618
392/** load & save, init *******************************************************/ 619/** load & save, init *******************************************************/
393 620
621/* swap sv heads, at least logically */
622static void
623swap_svs (pTHX_ Coro__State c)
624{
625 int i;
626
627 for (i = 0; i <= AvFILLp (c->swap_sv); )
628 {
629 SV *a = AvARRAY (c->swap_sv)[i++];
630 SV *b = AvARRAY (c->swap_sv)[i++];
631
632 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
633 SV tmp;
634
635 /* swap sv_any */
636 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
637
638 /* swap sv_flags */
639 SvFLAGS (&tmp) = SvFLAGS (a);
640 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
641 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
642
643#if PERL_VERSION_ATLEAST (5,10,0)
644 /* perl 5.10 complicates this _quite_ a bit, but it also is
645 * much faster, so no quarrels here. alternatively, we could
646 * sv_upgrade to avoid this.
647 */
648 {
649 /* swap sv_u */
650 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
651
652 /* if SvANY points to the head, we need to adjust the pointers,
653 * as the pointer for a still points to b, and maybe vice versa.
654 */
655 #define svany_in_head(type) \
656 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
657
658 if (svany_in_head (SvTYPE (a)))
659 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
660
661 if (svany_in_head (SvTYPE (b)))
662 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
663 }
664#endif
665 }
666}
667
668#define SWAP_SVS(coro) \
669 if (expect_false ((coro)->swap_sv)) \
670 swap_svs (aTHX_ (coro))
671
672static void
673on_enterleave_call (pTHX_ SV *cb);
674
394static void 675static void
395load_perl (pTHX_ Coro__State c) 676load_perl (pTHX_ Coro__State c)
396{ 677{
678 perl_slots *slot = c->slot;
679 c->slot = 0;
680
681 PL_mainstack = c->mainstack;
682
683 GvSV (PL_defgv) = slot->defsv;
684 GvAV (PL_defgv) = slot->defav;
685 GvSV (PL_errgv) = slot->errsv;
686 GvSV (irsgv) = slot->irsgv;
687 GvHV (PL_hintgv) = slot->hinthv;
688
397#define VAR(name,type) PL_ ## name = c->name; 689 #define VAR(name,type) PL_ ## name = slot->name;
398# include "state.h" 690 # include "state.h"
399#undef VAR 691 #undef VAR
400
401 GvSV (PL_defgv) = c->defsv;
402 GvAV (PL_defgv) = c->defav;
403 GvSV (PL_errgv) = c->errsv;
404 GvSV (irsgv) = c->irssv_sv;
405 692
406 { 693 {
407 dSP; 694 dSP;
695
408 CV *cv; 696 CV *cv;
409 697
410 /* now do the ugly restore mess */ 698 /* now do the ugly restore mess */
411 while ((cv = (CV *)POPs)) 699 while (expect_true (cv = (CV *)POPs))
412 { 700 {
413 put_padlist (aTHX_ cv); /* mark this padlist as available */ 701 put_padlist (aTHX_ cv); /* mark this padlist as available */
414 CvDEPTH (cv) = PTR2IV (POPs); 702 CvDEPTH (cv) = PTR2IV (POPs);
415 CvPADLIST (cv) = (AV *)POPs; 703 CvPADLIST (cv) = (AV *)POPs;
416 } 704 }
417 705
418 PUTBACK; 706 PUTBACK;
419 } 707 }
708
709 slf_frame = c->slf_frame;
710 CORO_THROW = c->except;
711
712 if (expect_false (enable_times))
713 {
714 if (expect_false (!times_valid))
715 coro_times_update ();
716
717 coro_times_sub (c);
718 }
719
720 if (expect_false (c->on_enter))
721 {
722 int i;
723
724 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
725 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
726 }
727
728 SWAP_SVS (c);
420} 729}
421 730
422static void 731static void
423save_perl (pTHX_ Coro__State c) 732save_perl (pTHX_ Coro__State c)
424{ 733{
734 SWAP_SVS (c);
735
736 if (expect_false (c->on_leave))
737 {
738 int i;
739
740 for (i = AvFILLp (c->on_leave); i >= 0; --i)
741 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
742 }
743
744 times_valid = 0;
745
746 if (expect_false (enable_times))
747 {
748 coro_times_update (); times_valid = 1;
749 coro_times_add (c);
750 }
751
752 c->except = CORO_THROW;
753 c->slf_frame = slf_frame;
754
425 { 755 {
426 dSP; 756 dSP;
427 I32 cxix = cxstack_ix; 757 I32 cxix = cxstack_ix;
428 PERL_CONTEXT *ccstk = cxstack; 758 PERL_CONTEXT *ccstk = cxstack;
429 PERL_SI *top_si = PL_curstackinfo; 759 PERL_SI *top_si = PL_curstackinfo;
… …
435 765
436 XPUSHs (Nullsv); 766 XPUSHs (Nullsv);
437 /* this loop was inspired by pp_caller */ 767 /* this loop was inspired by pp_caller */
438 for (;;) 768 for (;;)
439 { 769 {
440 while (cxix >= 0) 770 while (expect_true (cxix >= 0))
441 { 771 {
442 PERL_CONTEXT *cx = &ccstk[cxix--]; 772 PERL_CONTEXT *cx = &ccstk[cxix--];
443 773
444 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT) 774 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
445 { 775 {
446 CV *cv = cx->blk_sub.cv; 776 CV *cv = cx->blk_sub.cv;
447 777
448 if (CvDEPTH (cv)) 778 if (expect_true (CvDEPTH (cv)))
449 { 779 {
450 EXTEND (SP, 3); 780 EXTEND (SP, 3);
451 PUSHs ((SV *)CvPADLIST (cv)); 781 PUSHs ((SV *)CvPADLIST (cv));
452 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 782 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
453 PUSHs ((SV *)cv); 783 PUSHs ((SV *)cv);
454 784
455 CvDEPTH (cv) = 0; 785 CvDEPTH (cv) = 0;
456 get_padlist (aTHX_ cv); 786 get_padlist (aTHX_ cv);
457 } 787 }
458 } 788 }
459 } 789 }
460 790
461 if (top_si->si_type == PERLSI_MAIN) 791 if (expect_true (top_si->si_type == PERLSI_MAIN))
462 break; 792 break;
463 793
464 top_si = top_si->si_prev; 794 top_si = top_si->si_prev;
465 ccstk = top_si->si_cxstack; 795 ccstk = top_si->si_cxstack;
466 cxix = top_si->si_cxix; 796 cxix = top_si->si_cxix;
467 } 797 }
468 798
469 PUTBACK; 799 PUTBACK;
470 } 800 }
471 801
802 /* allocate some space on the context stack for our purposes */
803 /* we manually unroll here, as usually 2 slots is enough */
804 if (SLOT_COUNT >= 1) CXINC;
805 if (SLOT_COUNT >= 2) CXINC;
806 if (SLOT_COUNT >= 3) CXINC;
807 {
808 unsigned int i;
809 for (i = 3; i < SLOT_COUNT; ++i)
810 CXINC;
811 }
812 cxstack_ix -= SLOT_COUNT; /* undo allocation */
813
814 c->mainstack = PL_mainstack;
815
816 {
817 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
818
472 c->defav = GvAV (PL_defgv); 819 slot->defav = GvAV (PL_defgv);
473 c->defsv = DEFSV; 820 slot->defsv = DEFSV;
474 c->errsv = ERRSV; 821 slot->errsv = ERRSV;
475 c->irssv_sv = GvSV (irsgv); 822 slot->irsgv = GvSV (irsgv);
823 slot->hinthv = GvHV (PL_hintgv);
476 824
477#define VAR(name,type)c->name = PL_ ## name; 825 #define VAR(name,type) slot->name = PL_ ## name;
478# include "state.h" 826 # include "state.h"
479#undef VAR 827 #undef VAR
828 }
480} 829}
481 830
482/* 831/*
483 * allocate various perl stacks. This is an exact copy 832 * allocate various perl stacks. This is almost an exact copy
484 * of perl.c:init_stacks, except that it uses less memory 833 * of perl.c:init_stacks, except that it uses less memory
485 * on the (sometimes correct) assumption that coroutines do 834 * on the (sometimes correct) assumption that coroutines do
486 * not usually need a lot of stackspace. 835 * not usually need a lot of stackspace.
487 */ 836 */
488#if CORO_PREFER_PERL_FUNCTIONS 837#if CORO_PREFER_PERL_FUNCTIONS
489# define coro_init_stacks init_stacks 838# define coro_init_stacks(thx) init_stacks ()
490#else 839#else
491static void 840static void
492coro_init_stacks (pTHX) 841coro_init_stacks (pTHX)
493{ 842{
494 PL_curstackinfo = new_stackinfo(64, 6); 843 PL_curstackinfo = new_stackinfo(32, 8);
495 PL_curstackinfo->si_type = PERLSI_MAIN; 844 PL_curstackinfo->si_type = PERLSI_MAIN;
496 PL_curstack = PL_curstackinfo->si_stack; 845 PL_curstack = PL_curstackinfo->si_stack;
497 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 846 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
498 847
499 PL_stack_base = AvARRAY(PL_curstack); 848 PL_stack_base = AvARRAY(PL_curstack);
500 PL_stack_sp = PL_stack_base; 849 PL_stack_sp = PL_stack_base;
501 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 850 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
502 851
503 New(50,PL_tmps_stack,64,SV*); 852 New(50,PL_tmps_stack,32,SV*);
504 PL_tmps_floor = -1; 853 PL_tmps_floor = -1;
505 PL_tmps_ix = -1; 854 PL_tmps_ix = -1;
506 PL_tmps_max = 64; 855 PL_tmps_max = 32;
507 856
508 New(54,PL_markstack,16,I32); 857 New(54,PL_markstack,16,I32);
509 PL_markstack_ptr = PL_markstack; 858 PL_markstack_ptr = PL_markstack;
510 PL_markstack_max = PL_markstack + 16; 859 PL_markstack_max = PL_markstack + 16;
511 860
512#ifdef SET_MARK_OFFSET 861#ifdef SET_MARK_OFFSET
513 SET_MARK_OFFSET; 862 SET_MARK_OFFSET;
514#endif 863#endif
515 864
516 New(54,PL_scopestack,16,I32); 865 New(54,PL_scopestack,8,I32);
517 PL_scopestack_ix = 0; 866 PL_scopestack_ix = 0;
518 PL_scopestack_max = 16; 867 PL_scopestack_max = 8;
519 868
520 New(54,PL_savestack,64,ANY); 869 New(54,PL_savestack,24,ANY);
521 PL_savestack_ix = 0; 870 PL_savestack_ix = 0;
522 PL_savestack_max = 64; 871 PL_savestack_max = 24;
523 872
524#if !PERL_VERSION_ATLEAST (5,9,0) 873#if !PERL_VERSION_ATLEAST (5,10,0)
525 New(54,PL_retstack,4,OP*); 874 New(54,PL_retstack,4,OP*);
526 PL_retstack_ix = 0; 875 PL_retstack_ix = 0;
527 PL_retstack_max = 4; 876 PL_retstack_max = 4;
528#endif 877#endif
529} 878}
… …
531 880
532/* 881/*
533 * destroy the stacks, the callchain etc... 882 * destroy the stacks, the callchain etc...
534 */ 883 */
535static void 884static void
536coro_destroy_stacks (pTHX) 885coro_destruct_stacks (pTHX)
537{ 886{
538 while (PL_curstackinfo->si_next) 887 while (PL_curstackinfo->si_next)
539 PL_curstackinfo = PL_curstackinfo->si_next; 888 PL_curstackinfo = PL_curstackinfo->si_next;
540 889
541 while (PL_curstackinfo) 890 while (PL_curstackinfo)
… …
552 901
553 Safefree (PL_tmps_stack); 902 Safefree (PL_tmps_stack);
554 Safefree (PL_markstack); 903 Safefree (PL_markstack);
555 Safefree (PL_scopestack); 904 Safefree (PL_scopestack);
556 Safefree (PL_savestack); 905 Safefree (PL_savestack);
557#if !PERL_VERSION_ATLEAST (5,9,0) 906#if !PERL_VERSION_ATLEAST (5,10,0)
558 Safefree (PL_retstack); 907 Safefree (PL_retstack);
559#endif 908#endif
560} 909}
561 910
911#define CORO_RSS \
912 rss += sizeof (SYM (curstackinfo)); \
913 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
914 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
915 rss += SYM (tmps_max) * sizeof (SV *); \
916 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
917 rss += SYM (scopestack_max) * sizeof (I32); \
918 rss += SYM (savestack_max) * sizeof (ANY);
919
562static size_t 920static size_t
563coro_rss (pTHX_ struct coro *coro) 921coro_rss (pTHX_ struct coro *coro)
564{ 922{
565 size_t rss = sizeof (*coro); 923 size_t rss = sizeof (*coro);
566 924
567 if (coro->mainstack) 925 if (coro->mainstack)
568 { 926 {
569 if (coro->flags & CF_RUNNING) 927 if (coro->flags & CF_RUNNING)
570 { 928 {
571 #define VAR(name,type)coro->name = PL_ ## name; 929 #define SYM(sym) PL_ ## sym
572 # include "state.h" 930 CORO_RSS;
573 #undef VAR 931 #undef SYM
574 } 932 }
933 else
934 {
935 #define SYM(sym) coro->slot->sym
936 CORO_RSS;
937 #undef SYM
938 }
939 }
575 940
576 rss += sizeof (coro->curstackinfo); 941 return rss;
577 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *); 942}
578 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
579 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
580 rss += coro->tmps_max * sizeof (SV *);
581 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
582 rss += coro->scopestack_max * sizeof (I32);
583 rss += coro->savestack_max * sizeof (ANY);
584 943
585#if !PERL_VERSION_ATLEAST (5,9,0) 944/** coroutine stack handling ************************************************/
586 rss += coro->retstack_max * sizeof (OP *); 945
946static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
947static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
948static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
949
950/* apparently < 5.8.8 */
951#ifndef MgPV_nolen_const
952#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
953 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
954 (const char*)(mg)->mg_ptr)
587#endif 955#endif
956
957/*
958 * This overrides the default magic get method of %SIG elements.
959 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
960 * and instead of trying to save and restore the hash elements, we just provide
961 * readback here.
962 */
963static int
964coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
965{
966 const char *s = MgPV_nolen_const (mg);
967
968 if (*s == '_')
588 } 969 {
970 SV **svp = 0;
589 971
972 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
973 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
974
975 if (svp)
976 {
977 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
978 return 0;
979 }
980 }
981
982 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
983}
984
985static int
986coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
987{
988 const char *s = MgPV_nolen_const (mg);
989
990 if (*s == '_')
991 {
992 SV **svp = 0;
993
994 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
995 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
996
997 if (svp)
998 {
999 SV *old = *svp;
1000 *svp = 0;
1001 SvREFCNT_dec (old);
1002 return 0;
1003 }
1004 }
1005
1006 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1007}
1008
1009static int
1010coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1011{
1012 const char *s = MgPV_nolen_const (mg);
1013
1014 if (*s == '_')
1015 {
1016 SV **svp = 0;
1017
1018 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1019 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1020
1021 if (svp)
1022 {
1023 SV *old = *svp;
1024 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1025 SvREFCNT_dec (old);
1026 return 0;
1027 }
1028 }
1029
1030 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1031}
1032
1033static void
1034prepare_nop (pTHX_ struct coro_transfer_args *ta)
1035{
1036 /* kind of mega-hacky, but works */
1037 ta->next = ta->prev = (struct coro *)ta;
1038}
1039
1040static int
1041slf_check_nop (pTHX_ struct CoroSLF *frame)
1042{
590 return rss; 1043 return 0;
591} 1044}
592 1045
593/** coroutine stack handling ************************************************/
594
595static void 1046static int
1047slf_check_repeat (pTHX_ struct CoroSLF *frame)
1048{
1049 return 1;
1050}
1051
1052static UNOP init_perl_op;
1053
1054static void NOINLINE /* noinline to keep it out of the transfer fast path */
596coro_setup (pTHX_ struct coro *coro) 1055init_perl (pTHX_ struct coro *coro)
597{ 1056{
598 /* 1057 /*
599 * emulate part of the perl startup here. 1058 * emulate part of the perl startup here.
600 */ 1059 */
601 coro_init_stacks (aTHX); 1060 coro_init_stacks (aTHX);
602 1061
603 PL_runops = RUNOPS_DEFAULT; 1062 PL_runops = RUNOPS_DEFAULT;
604 PL_curcop = &PL_compiling; 1063 PL_curcop = &PL_compiling;
605 PL_in_eval = EVAL_NULL; 1064 PL_in_eval = EVAL_NULL;
606 PL_comppad = 0; 1065 PL_comppad = 0;
1066 PL_comppad_name = 0;
1067 PL_comppad_name_fill = 0;
1068 PL_comppad_name_floor = 0;
607 PL_curpm = 0; 1069 PL_curpm = 0;
1070 PL_curpad = 0;
608 PL_localizing = 0; 1071 PL_localizing = 0;
609 PL_dirty = 0;
610 PL_restartop = 0; 1072 PL_restartop = 0;
1073#if PERL_VERSION_ATLEAST (5,10,0)
1074 PL_parser = 0;
1075#endif
1076 PL_hints = 0;
1077
1078 /* recreate the die/warn hooks */
1079 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
1080 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
611 1081
612 GvSV (PL_defgv) = newSV (0); 1082 GvSV (PL_defgv) = newSV (0);
613 GvAV (PL_defgv) = coro->args; coro->args = 0; 1083 GvAV (PL_defgv) = coro->args; coro->args = 0;
614 GvSV (PL_errgv) = newSV (0); 1084 GvSV (PL_errgv) = newSV (0);
615 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 1085 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1086 GvHV (PL_hintgv) = 0;
616 PL_rs = newSVsv (GvSV (irsgv)); 1087 PL_rs = newSVsv (GvSV (irsgv));
617 PL_defoutgv = SvREFCNT_inc (stdoutgv); 1088 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
618 1089
619 { 1090 {
620 dSP; 1091 dSP;
621 LOGOP myop; 1092 UNOP myop;
622 1093
623 Zero (&myop, 1, LOGOP); 1094 Zero (&myop, 1, UNOP);
624 myop.op_next = Nullop; 1095 myop.op_next = Nullop;
1096 myop.op_type = OP_ENTERSUB;
625 myop.op_flags = OPf_WANT_VOID; 1097 myop.op_flags = OPf_WANT_VOID;
626 1098
627 PUSHMARK (SP); 1099 PUSHMARK (SP);
628 XPUSHs (av_shift (GvAV (PL_defgv))); 1100 PUSHs ((SV *)coro->startcv);
629 PUTBACK; 1101 PUTBACK;
630 PL_op = (OP *)&myop; 1102 PL_op = (OP *)&myop;
631 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1103 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
632 SPAGAIN;
633 } 1104 }
634 1105
635 ENTER; /* necessary e.g. for dounwind */ 1106 /* this newly created coroutine might be run on an existing cctx which most
636} 1107 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1108 */
1109 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1110 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
637 1111
1112 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1113 init_perl_op.op_next = PL_op;
1114 init_perl_op.op_type = OP_ENTERSUB;
1115 init_perl_op.op_ppaddr = pp_slf;
1116 /* no flags etc. required, as an init function won't be called */
1117
1118 PL_op = (OP *)&init_perl_op;
1119
1120 /* copy throw, in case it was set before init_perl */
1121 CORO_THROW = coro->except;
1122
1123 SWAP_SVS (coro);
1124
1125 if (expect_false (enable_times))
1126 {
1127 coro_times_update ();
1128 coro_times_sub (coro);
1129 }
1130}
1131
638static void 1132static void
639coro_destroy (pTHX_ struct coro *coro) 1133coro_unwind_stacks (pTHX)
640{ 1134{
641 if (!IN_DESTRUCT) 1135 if (!IN_DESTRUCT)
642 { 1136 {
643 /* restore all saved variables and stuff */ 1137 /* restore all saved variables and stuff */
644 LEAVE_SCOPE (0); 1138 LEAVE_SCOPE (0);
… …
652 POPSTACK_TO (PL_mainstack); 1146 POPSTACK_TO (PL_mainstack);
653 1147
654 /* unwind main stack */ 1148 /* unwind main stack */
655 dounwind (-1); 1149 dounwind (-1);
656 } 1150 }
1151}
657 1152
658 SvREFCNT_dec (GvSV (PL_defgv)); 1153static void
659 SvREFCNT_dec (GvAV (PL_defgv)); 1154destroy_perl (pTHX_ struct coro *coro)
660 SvREFCNT_dec (GvSV (PL_errgv)); 1155{
661 SvREFCNT_dec (PL_defoutgv); 1156 SV *svf [9];
662 SvREFCNT_dec (PL_rs);
663 SvREFCNT_dec (GvSV (irsgv));
664 1157
1158 {
1159 struct coro *current = SvSTATE_current;
1160
1161 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1162
1163 save_perl (aTHX_ current);
1164 load_perl (aTHX_ coro);
1165
1166 coro_unwind_stacks (aTHX);
1167 coro_destruct_stacks (aTHX);
1168
1169 /* restore swapped sv's */
1170 SWAP_SVS (coro);
1171
1172 // now save some sv's to be free'd later
1173 svf [0] = GvSV (PL_defgv);
1174 svf [1] = (SV *)GvAV (PL_defgv);
1175 svf [2] = GvSV (PL_errgv);
1176 svf [3] = (SV *)PL_defoutgv;
1177 svf [4] = PL_rs;
1178 svf [5] = GvSV (irsgv);
1179 svf [6] = (SV *)GvHV (PL_hintgv);
1180 svf [7] = PL_diehook;
1181 svf [8] = PL_warnhook;
1182 assert (9 == sizeof (svf) / sizeof (*svf));
1183
1184 load_perl (aTHX_ current);
1185 }
1186
1187 {
1188 unsigned int i;
1189
1190 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1191 SvREFCNT_dec (svf [i]);
1192
665 SvREFCNT_dec (coro->saved_deffh); 1193 SvREFCNT_dec (coro->saved_deffh);
666 //SvREFCNT_dec (coro->throw); 1194 SvREFCNT_dec (coro->rouse_cb);
667 1195 SvREFCNT_dec (coro->invoke_cb);
668 coro_destroy_stacks (aTHX); 1196 SvREFCNT_dec (coro->invoke_av);
1197 }
669} 1198}
670 1199
671static void 1200INLINE void
672free_coro_mortal (pTHX) 1201free_coro_mortal (pTHX)
673{ 1202{
674 if (coro_mortal) 1203 if (expect_true (coro_mortal))
675 { 1204 {
676 SvREFCNT_dec (coro_mortal); 1205 SvREFCNT_dec (coro_mortal);
677 coro_mortal = 0; 1206 coro_mortal = 0;
678 } 1207 }
679} 1208}
… …
681static int 1210static int
682runops_trace (pTHX) 1211runops_trace (pTHX)
683{ 1212{
684 COP *oldcop = 0; 1213 COP *oldcop = 0;
685 int oldcxix = -2; 1214 int oldcxix = -2;
686 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
687 coro_cctx *cctx = coro->cctx;
688 1215
689 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1216 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
690 { 1217 {
691 PERL_ASYNC_CHECK (); 1218 PERL_ASYNC_CHECK ();
692 1219
693 if (cctx->flags & CC_TRACE_ALL) 1220 if (cctx_current->flags & CC_TRACE_ALL)
694 { 1221 {
695 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1222 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
696 { 1223 {
697 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1224 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
698 SV **bot, **top; 1225 SV **bot, **top;
699 AV *av = newAV (); /* return values */ 1226 AV *av = newAV (); /* return values */
700 SV **cb; 1227 SV **cb;
… …
708 bot = PL_stack_base + cx->blk_oldsp + 1; 1235 bot = PL_stack_base + cx->blk_oldsp + 1;
709 top = cx->blk_gimme == G_ARRAY ? SP + 1 1236 top = cx->blk_gimme == G_ARRAY ? SP + 1
710 : cx->blk_gimme == G_SCALAR ? bot + 1 1237 : cx->blk_gimme == G_SCALAR ? bot + 1
711 : bot; 1238 : bot;
712 1239
1240 av_extend (av, top - bot);
713 while (bot < top) 1241 while (bot < top)
714 av_push (av, SvREFCNT_inc (*bot++)); 1242 av_push (av, SvREFCNT_inc_NN (*bot++));
715 1243
716 PL_runops = RUNOPS_DEFAULT; 1244 PL_runops = RUNOPS_DEFAULT;
717 ENTER; 1245 ENTER;
718 SAVETMPS; 1246 SAVETMPS;
719 EXTEND (SP, 3); 1247 EXTEND (SP, 3);
… …
736 1264
737 if (PL_curcop != &PL_compiling) 1265 if (PL_curcop != &PL_compiling)
738 { 1266 {
739 SV **cb; 1267 SV **cb;
740 1268
741 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1269 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
742 { 1270 {
743 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1271 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
744 1272
745 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1273 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
746 { 1274 {
747 runops_proc_t old_runops = PL_runops;
748 dSP; 1275 dSP;
749 GV *gv = CvGV (cx->blk_sub.cv); 1276 GV *gv = CvGV (cx->blk_sub.cv);
750 SV *fullname = sv_2mortal (newSV (0)); 1277 SV *fullname = sv_2mortal (newSV (0));
751 1278
752 if (isGV (gv)) 1279 if (isGV (gv))
… …
757 SAVETMPS; 1284 SAVETMPS;
758 EXTEND (SP, 3); 1285 EXTEND (SP, 3);
759 PUSHMARK (SP); 1286 PUSHMARK (SP);
760 PUSHs (&PL_sv_yes); 1287 PUSHs (&PL_sv_yes);
761 PUSHs (fullname); 1288 PUSHs (fullname);
762 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1289 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
763 PUTBACK; 1290 PUTBACK;
764 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1291 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
765 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1292 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
766 SPAGAIN; 1293 SPAGAIN;
767 FREETMPS; 1294 FREETMPS;
… …
770 } 1297 }
771 1298
772 oldcxix = cxstack_ix; 1299 oldcxix = cxstack_ix;
773 } 1300 }
774 1301
775 if (cctx->flags & CC_TRACE_LINE) 1302 if (cctx_current->flags & CC_TRACE_LINE)
776 { 1303 {
777 dSP; 1304 dSP;
778 1305
779 PL_runops = RUNOPS_DEFAULT; 1306 PL_runops = RUNOPS_DEFAULT;
780 ENTER; 1307 ENTER;
… …
799 1326
800 TAINT_NOT; 1327 TAINT_NOT;
801 return 0; 1328 return 0;
802} 1329}
803 1330
804/* inject a fake call to Coro::State::_cctx_init into the execution */ 1331static struct CoroSLF cctx_ssl_frame;
805/* _cctx_init should be careful, as it could be called at almost any time */ 1332
806/* during execution of a perl program */ 1333static void
1334slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1335{
1336 ta->prev = 0;
1337}
1338
1339static int
1340slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1341{
1342 *frame = cctx_ssl_frame;
1343
1344 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1345}
1346
1347/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
807static void NOINLINE 1348static void NOINLINE
808prepare_cctx (pTHX_ coro_cctx *cctx) 1349cctx_prepare (pTHX)
809{ 1350{
810 dSP;
811 LOGOP myop;
812
813 PL_top_env = &PL_start_env; 1351 PL_top_env = &PL_start_env;
814 1352
815 if (cctx->flags & CC_TRACE) 1353 if (cctx_current->flags & CC_TRACE)
816 PL_runops = runops_trace; 1354 PL_runops = runops_trace;
817 1355
818 Zero (&myop, 1, LOGOP); 1356 /* we already must be executing an SLF op, there is no other valid way
819 myop.op_next = PL_op; 1357 * that can lead to creation of a new cctx */
820 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1358 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1359 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
821 1360
822 PUSHMARK (SP); 1361 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
823 EXTEND (SP, 2); 1362 cctx_ssl_frame = slf_frame;
824 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1363
825 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1364 slf_frame.prepare = slf_prepare_set_stacklevel;
826 PUTBACK; 1365 slf_frame.check = slf_check_set_stacklevel;
827 PL_op = (OP *)&myop; 1366}
828 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1367
829 SPAGAIN; 1368/* the tail of transfer: execute stuff we can only do after a transfer */
1369INLINE void
1370transfer_tail (pTHX)
1371{
1372 free_coro_mortal (aTHX);
830} 1373}
831 1374
832/* 1375/*
833 * this is a _very_ stripped down perl interpreter ;) 1376 * this is a _very_ stripped down perl interpreter ;)
834 */ 1377 */
835static void 1378static void
836coro_run (void *arg) 1379cctx_run (void *arg)
837{ 1380{
1381#ifdef USE_ITHREADS
1382# if CORO_PTHREAD
1383 PERL_SET_CONTEXT (coro_thx);
1384# endif
1385#endif
1386 {
838 dTHX; 1387 dTHX;
839 1388
840 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1389 /* normally we would need to skip the entersub here */
841 UNLOCK; 1390 /* not doing so will re-execute it, which is exactly what we want */
842
843 /* we now skip the entersub that lead to transfer() */
844 PL_op = PL_op->op_next; 1391 /* PL_nop = PL_nop->op_next */
845 1392
846 /* inject a fake subroutine call to cctx_init */ 1393 /* inject a fake subroutine call to cctx_init */
847 prepare_cctx (aTHX_ (coro_cctx *)arg); 1394 cctx_prepare (aTHX);
848 1395
1396 /* cctx_run is the alternative tail of transfer() */
1397 transfer_tail (aTHX);
1398
849 /* somebody or something will hit me for both perl_run and PL_restartop */ 1399 /* somebody or something will hit me for both perl_run and PL_restartop */
850 PL_restartop = PL_op; 1400 PL_restartop = PL_op;
851 perl_run (PL_curinterp); 1401 perl_run (PL_curinterp);
852
853 /* 1402 /*
1403 * Unfortunately, there is no way to get at the return values of the
1404 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1405 * runtime errors here, as this is just a random interpreter, not a thread.
1406 */
1407
1408 /*
854 * If perl-run returns we assume exit() was being called or the coro 1409 * If perl-run returns we assume exit() was being called or the coro
855 * fell off the end, which seems to be the only valid (non-bug) 1410 * fell off the end, which seems to be the only valid (non-bug)
856 * reason for perl_run to return. We try to exit by jumping to the 1411 * reason for perl_run to return. We try to exit by jumping to the
857 * bootstrap-time "top" top_env, as we cannot restore the "main" 1412 * bootstrap-time "top" top_env, as we cannot restore the "main"
858 * coroutine as Coro has no such concept 1413 * coroutine as Coro has no such concept.
1414 * This actually isn't valid with the pthread backend, but OSes requiring
1415 * that backend are too broken to do it in a standards-compliant way.
859 */ 1416 */
860 PL_top_env = main_top_env; 1417 PL_top_env = main_top_env;
861 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1418 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1419 }
862} 1420}
863 1421
864static coro_cctx * 1422static coro_cctx *
865cctx_new () 1423cctx_new ()
866{ 1424{
867 coro_cctx *cctx; 1425 coro_cctx *cctx;
1426
1427 ++cctx_count;
1428 New (0, cctx, 1, coro_cctx);
1429
1430 cctx->gen = cctx_gen;
1431 cctx->flags = 0;
1432 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1433
1434 return cctx;
1435}
1436
1437/* create a new cctx only suitable as source */
1438static coro_cctx *
1439cctx_new_empty ()
1440{
1441 coro_cctx *cctx = cctx_new ();
1442
1443 cctx->sptr = 0;
1444 coro_create (&cctx->cctx, 0, 0, 0, 0);
1445
1446 return cctx;
1447}
1448
1449/* create a new cctx suitable as destination/running a perl interpreter */
1450static coro_cctx *
1451cctx_new_run ()
1452{
1453 coro_cctx *cctx = cctx_new ();
868 void *stack_start; 1454 void *stack_start;
869 size_t stack_size; 1455 size_t stack_size;
870 1456
871 ++cctx_count;
872
873 Newz (0, cctx, 1, coro_cctx);
874
875#if HAVE_MMAP 1457#if HAVE_MMAP
876
877 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1458 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
878 /* mmap supposedly does allocate-on-write for us */ 1459 /* mmap supposedly does allocate-on-write for us */
879 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1460 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
880 1461
881 if (cctx->sptr != (void *)-1) 1462 if (cctx->sptr != (void *)-1)
882 { 1463 {
883# if CORO_STACKGUARD 1464 #if CORO_STACKGUARD
884 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1465 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
885# endif 1466 #endif
886 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1467 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
887 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1468 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
888 cctx->flags |= CC_MAPPED; 1469 cctx->flags |= CC_MAPPED;
889 } 1470 }
890 else 1471 else
891#endif 1472#endif
892 { 1473 {
893 cctx->ssize = coro_stacksize * (long)sizeof (long); 1474 cctx->ssize = cctx_stacksize * (long)sizeof (long);
894 New (0, cctx->sptr, coro_stacksize, long); 1475 New (0, cctx->sptr, cctx_stacksize, long);
895 1476
896 if (!cctx->sptr) 1477 if (!cctx->sptr)
897 { 1478 {
898 perror ("FATAL: unable to allocate stack for coroutine"); 1479 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
899 _exit (EXIT_FAILURE); 1480 _exit (EXIT_FAILURE);
900 } 1481 }
901 1482
902 stack_start = cctx->sptr; 1483 stack_start = cctx->sptr;
903 stack_size = cctx->ssize; 1484 stack_size = cctx->ssize;
904 } 1485 }
905 1486
906 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1487 #if CORO_USE_VALGRIND
1488 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1489 #endif
1490
907 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1491 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
908 1492
909 return cctx; 1493 return cctx;
910} 1494}
911 1495
912static void 1496static void
913cctx_destroy (coro_cctx *cctx) 1497cctx_destroy (coro_cctx *cctx)
914{ 1498{
915 if (!cctx) 1499 if (!cctx)
916 return; 1500 return;
917 1501
1502 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1503
918 --cctx_count; 1504 --cctx_count;
1505 coro_destroy (&cctx->cctx);
919 1506
1507 /* coro_transfer creates new, empty cctx's */
1508 if (cctx->sptr)
1509 {
920#if CORO_USE_VALGRIND 1510 #if CORO_USE_VALGRIND
921 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1511 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1512 #endif
1513
1514#if HAVE_MMAP
1515 if (cctx->flags & CC_MAPPED)
1516 munmap (cctx->sptr, cctx->ssize);
1517 else
922#endif 1518#endif
923
924#if HAVE_MMAP
925 if (cctx->flags & CC_MAPPED)
926 munmap (cctx->sptr, cctx->ssize);
927 else
928#endif
929 Safefree (cctx->sptr); 1519 Safefree (cctx->sptr);
1520 }
930 1521
931 Safefree (cctx); 1522 Safefree (cctx);
932} 1523}
1524
1525/* wether this cctx should be destructed */
1526#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
933 1527
934static coro_cctx * 1528static coro_cctx *
935cctx_get (pTHX) 1529cctx_get (pTHX)
936{ 1530{
937 while (cctx_first) 1531 while (expect_true (cctx_first))
938 { 1532 {
939 coro_cctx *cctx = cctx_first; 1533 coro_cctx *cctx = cctx_first;
940 cctx_first = cctx->next; 1534 cctx_first = cctx->next;
941 --cctx_idle; 1535 --cctx_idle;
942 1536
943 if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE)) 1537 if (expect_true (!CCTX_EXPIRED (cctx)))
944 return cctx; 1538 return cctx;
945 1539
946 cctx_destroy (cctx); 1540 cctx_destroy (cctx);
947 } 1541 }
948 1542
949 return cctx_new (); 1543 return cctx_new_run ();
950} 1544}
951 1545
952static void 1546static void
953cctx_put (coro_cctx *cctx) 1547cctx_put (coro_cctx *cctx)
954{ 1548{
1549 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1550
955 /* free another cctx if overlimit */ 1551 /* free another cctx if overlimit */
956 if (cctx_idle >= MAX_IDLE_CCTX) 1552 if (expect_false (cctx_idle >= cctx_max_idle))
957 { 1553 {
958 coro_cctx *first = cctx_first; 1554 coro_cctx *first = cctx_first;
959 cctx_first = first->next; 1555 cctx_first = first->next;
960 --cctx_idle; 1556 --cctx_idle;
961 1557
… …
967 cctx_first = cctx; 1563 cctx_first = cctx;
968} 1564}
969 1565
970/** coroutine switching *****************************************************/ 1566/** coroutine switching *****************************************************/
971 1567
972static void NOINLINE 1568static void
973transfer_check (pTHX_ struct coro *prev, struct coro *next) 1569transfer_check (pTHX_ struct coro *prev, struct coro *next)
974{ 1570{
975 if (prev != next) 1571 /* TODO: throwing up here is considered harmful */
1572
1573 if (expect_true (prev != next))
976 { 1574 {
977 if (!(prev->flags & (CF_RUNNING | CF_NEW))) 1575 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
978 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1576 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
979 1577
980 if (next->flags & CF_RUNNING) 1578 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
981 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
982
983 if (next->flags & CF_DESTROYED)
984 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1579 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
985 1580
1581#if !PERL_VERSION_ATLEAST (5,10,0)
986 if (PL_lex_state != LEX_NOTPARSING) 1582 if (expect_false (PL_lex_state != LEX_NOTPARSING))
987 croak ("Coro::State::transfer called while parsing, but this is not supported"); 1583 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1584#endif
988 } 1585 }
989} 1586}
990 1587
991/* always use the TRANSFER macro */ 1588/* always use the TRANSFER macro */
992static void NOINLINE 1589static void NOINLINE /* noinline so we have a fixed stackframe */
993transfer (pTHX_ struct coro *prev, struct coro *next) 1590transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
994{ 1591{
995 dSTACKLEVEL; 1592 dSTACKLEVEL;
996 1593
997 /* sometimes transfer is only called to set idle_sp */ 1594 /* sometimes transfer is only called to set idle_sp */
998 if (!next) 1595 if (expect_false (!prev))
999 { 1596 {
1000 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1597 cctx_current->idle_sp = STACKLEVEL;
1001 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1598 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1002 }
1003 else if (prev != next)
1004 { 1599 }
1600 else if (expect_true (prev != next))
1601 {
1005 coro_cctx *prev__cctx; 1602 coro_cctx *cctx_prev;
1006 1603
1007 if (prev->flags & CF_NEW) 1604 if (expect_false (prev->flags & CF_NEW))
1008 { 1605 {
1009 /* create a new empty context */ 1606 /* create a new empty/source context */
1010 Newz (0, prev->cctx, 1, coro_cctx);
1011 prev->flags &= ~CF_NEW; 1607 prev->flags &= ~CF_NEW;
1012 prev->flags |= CF_RUNNING; 1608 prev->flags |= CF_RUNNING;
1013 } 1609 }
1014 1610
1015 prev->flags &= ~CF_RUNNING; 1611 prev->flags &= ~CF_RUNNING;
1016 next->flags |= CF_RUNNING; 1612 next->flags |= CF_RUNNING;
1017 1613
1018 LOCK; 1614 /* first get rid of the old state */
1615 save_perl (aTHX_ prev);
1019 1616
1020 if (next->flags & CF_NEW) 1617 if (expect_false (next->flags & CF_NEW))
1021 { 1618 {
1022 /* need to start coroutine */ 1619 /* need to start coroutine */
1023 next->flags &= ~CF_NEW; 1620 next->flags &= ~CF_NEW;
1024 /* first get rid of the old state */
1025 save_perl (aTHX_ prev);
1026 /* setup coroutine call */ 1621 /* setup coroutine call */
1027 coro_setup (aTHX_ next); 1622 init_perl (aTHX_ next);
1028 } 1623 }
1029 else 1624 else
1625 load_perl (aTHX_ next);
1626
1627 /* possibly untie and reuse the cctx */
1628 if (expect_true (
1629 cctx_current->idle_sp == STACKLEVEL
1630 && !(cctx_current->flags & CC_TRACE)
1631 && !force_cctx
1632 ))
1030 { 1633 {
1031 /* coroutine already started */ 1634 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1032 save_perl (aTHX_ prev); 1635 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1033 load_perl (aTHX_ next); 1636
1637 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1638 /* without this the next cctx_get might destroy the running cctx while still in use */
1639 if (expect_false (CCTX_EXPIRED (cctx_current)))
1640 if (expect_true (!next->cctx))
1641 next->cctx = cctx_get (aTHX);
1642
1643 cctx_put (cctx_current);
1034 } 1644 }
1645 else
1646 prev->cctx = cctx_current;
1035 1647
1036 prev__cctx = prev->cctx; 1648 ++next->usecount;
1037 1649
1038 /* possibly "free" the cctx */ 1650 cctx_prev = cctx_current;
1039 if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)) 1651 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1652
1653 next->cctx = 0;
1654
1655 if (expect_false (cctx_prev != cctx_current))
1040 { 1656 {
1041 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1657 cctx_prev->top_env = PL_top_env;
1042 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1658 PL_top_env = cctx_current->top_env;
1043 1659 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1044 prev->cctx = 0;
1045
1046 cctx_put (prev__cctx);
1047 } 1660 }
1048 1661
1049 ++next->usecount; 1662 transfer_tail (aTHX);
1050
1051 if (!next->cctx)
1052 next->cctx = cctx_get (aTHX);
1053
1054 if (prev__cctx != next->cctx)
1055 {
1056 prev__cctx->top_env = PL_top_env;
1057 PL_top_env = next->cctx->top_env;
1058 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1059 }
1060
1061 free_coro_mortal (aTHX);
1062 UNLOCK;
1063 } 1663 }
1064} 1664}
1065 1665
1066struct transfer_args
1067{
1068 struct coro *prev, *next;
1069};
1070
1071#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1666#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1072#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1667#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1073 1668
1074/** high level stuff ********************************************************/ 1669/** high level stuff ********************************************************/
1075 1670
1076static int 1671static void
1077coro_state_destroy (pTHX_ struct coro *coro) 1672coro_state_destroy (pTHX_ struct coro *coro)
1078{ 1673{
1079 if (coro->flags & CF_DESTROYED) 1674 if (coro->flags & CF_DESTROYED)
1080 return 0; 1675 return;
1676
1677 /* this callback is reserved for slf functions needing to do cleanup */
1678 if (coro->on_destroy && !PL_dirty)
1679 coro->on_destroy (aTHX_ coro);
1680
1681 /*
1682 * The on_destroy above most likely is from an SLF call.
1683 * Since by definition the SLF call will not finish when we destroy
1684 * the coro, we will have to force-finish it here, otherwise
1685 * cleanup functions cannot call SLF functions.
1686 */
1687 coro->slf_frame.prepare = 0;
1081 1688
1082 coro->flags |= CF_DESTROYED; 1689 coro->flags |= CF_DESTROYED;
1083 1690
1084 if (coro->flags & CF_READY) 1691 if (coro->flags & CF_READY)
1085 { 1692 {
1086 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1693 /* reduce nready, as destroying a ready coro effectively unreadies it */
1087 /* alternative: look through all ready queues and remove the coro */ 1694 /* alternative: look through all ready queues and remove the coro */
1088 LOCK;
1089 --coro_nready; 1695 --coro_nready;
1090 UNLOCK;
1091 } 1696 }
1092 else 1697 else
1093 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1698 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1094 1699
1095 if (coro->mainstack && coro->mainstack != main_mainstack) 1700 if (coro->mainstack
1096 { 1701 && coro->mainstack != main_mainstack
1097 struct coro temp; 1702 && coro->slot
1098 1703 && !PL_dirty)
1099 if (coro->flags & CF_RUNNING)
1100 croak ("FATAL: tried to destroy currently running coroutine");
1101
1102 save_perl (aTHX_ &temp);
1103 load_perl (aTHX_ coro); 1704 destroy_perl (aTHX_ coro);
1104
1105 coro_destroy (aTHX_ coro);
1106
1107 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
1108
1109 coro->mainstack = 0;
1110 }
1111
1112 cctx_destroy (coro->cctx);
1113 SvREFCNT_dec (coro->args);
1114 1705
1115 if (coro->next) coro->next->prev = coro->prev; 1706 if (coro->next) coro->next->prev = coro->prev;
1116 if (coro->prev) coro->prev->next = coro->next; 1707 if (coro->prev) coro->prev->next = coro->next;
1117 if (coro == coro_first) coro_first = coro->next; 1708 if (coro == coro_first) coro_first = coro->next;
1118 1709
1119 return 1; 1710 cctx_destroy (coro->cctx);
1711 SvREFCNT_dec (coro->startcv);
1712 SvREFCNT_dec (coro->args);
1713 SvREFCNT_dec (coro->swap_sv);
1714 SvREFCNT_dec (CORO_THROW);
1120} 1715}
1121 1716
1122static int 1717static int
1123coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1718coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1124{ 1719{
… …
1156# define MGf_DUP 0 1751# define MGf_DUP 0
1157#endif 1752#endif
1158}; 1753};
1159 1754
1160static void 1755static void
1161prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1756prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1162{ 1757{
1163 ta->prev = SvSTATE (prev_sv); 1758 ta->prev = SvSTATE (prev_sv);
1164 ta->next = SvSTATE (next_sv); 1759 ta->next = SvSTATE (next_sv);
1165 TRANSFER_CHECK (*ta); 1760 TRANSFER_CHECK (*ta);
1166} 1761}
1167 1762
1168static void 1763static void
1169api_transfer (SV *prev_sv, SV *next_sv) 1764api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1765{
1766 struct coro_transfer_args ta;
1767
1768 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1769 TRANSFER (ta, 1);
1770}
1771
1772/** Coro ********************************************************************/
1773
1774INLINE void
1775coro_enq (pTHX_ struct coro *coro)
1776{
1777 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1778
1779 SvREFCNT_inc_NN (coro->hv);
1780
1781 coro->next_ready = 0;
1782 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1783 ready [1] = coro;
1784}
1785
1786INLINE struct coro *
1787coro_deq (pTHX)
1788{
1789 int prio;
1790
1791 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1792 {
1793 struct coro **ready = coro_ready [prio];
1794
1795 if (ready [0])
1796 {
1797 struct coro *coro = ready [0];
1798 ready [0] = coro->next_ready;
1799 return coro;
1800 }
1801 }
1802
1803 return 0;
1804}
1805
1806static void
1807invoke_sv_ready_hook_helper (void)
1170{ 1808{
1171 dTHX; 1809 dTHX;
1172 struct transfer_args ta; 1810 dSP;
1173 1811
1174 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1812 ENTER;
1175 TRANSFER (ta); 1813 SAVETMPS;
1176}
1177 1814
1178/** Coro ********************************************************************/ 1815 PUSHMARK (SP);
1816 PUTBACK;
1817 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1179 1818
1180static void 1819 FREETMPS;
1181coro_enq (pTHX_ SV *coro_sv) 1820 LEAVE;
1182{
1183 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1184}
1185
1186static SV *
1187coro_deq (pTHX_ int min_prio)
1188{
1189 int prio = PRIO_MAX - PRIO_MIN;
1190
1191 min_prio -= PRIO_MIN;
1192 if (min_prio < 0)
1193 min_prio = 0;
1194
1195 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1196 if (AvFILLp (coro_ready [prio]) >= 0)
1197 return av_shift (coro_ready [prio]);
1198
1199 return 0;
1200} 1821}
1201 1822
1202static int 1823static int
1203api_ready (SV *coro_sv) 1824api_ready (pTHX_ SV *coro_sv)
1204{ 1825{
1205 dTHX;
1206 struct coro *coro;
1207
1208 if (SvROK (coro_sv))
1209 coro_sv = SvRV (coro_sv);
1210
1211 coro = SvSTATE (coro_sv); 1826 struct coro *coro = SvSTATE (coro_sv);
1212 1827
1213 if (coro->flags & CF_READY) 1828 if (coro->flags & CF_READY)
1214 return 0; 1829 return 0;
1215 1830
1216 coro->flags |= CF_READY; 1831 coro->flags |= CF_READY;
1217 1832
1218 LOCK; 1833 coro_enq (aTHX_ coro);
1219 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1834
1220 ++coro_nready; 1835 if (!coro_nready++)
1221 UNLOCK; 1836 if (coroapi.readyhook)
1837 coroapi.readyhook ();
1222 1838
1223 return 1; 1839 return 1;
1224} 1840}
1225 1841
1226static int 1842static int
1227api_is_ready (SV *coro_sv) 1843api_is_ready (pTHX_ SV *coro_sv)
1228{ 1844{
1229 dTHX;
1230 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1845 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1231} 1846}
1232 1847
1233static void 1848/* expects to own a reference to next->hv */
1849INLINE void
1234prepare_schedule (pTHX_ struct transfer_args *ta) 1850prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1235{ 1851{
1236 SV *prev_sv, *next_sv;
1237
1238 for (;;)
1239 {
1240 LOCK;
1241 next_sv = coro_deq (aTHX_ PRIO_MIN);
1242
1243 /* nothing to schedule: call the idle handler */
1244 if (!next_sv)
1245 {
1246 dSP;
1247 UNLOCK;
1248
1249 ENTER;
1250 SAVETMPS;
1251
1252 PUSHMARK (SP);
1253 PUTBACK;
1254 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1255
1256 FREETMPS;
1257 LEAVE;
1258 continue;
1259 }
1260
1261 ta->next = SvSTATE (next_sv);
1262
1263 /* cannot transfer to destroyed coros, skip and look for next */
1264 if (ta->next->flags & CF_DESTROYED)
1265 {
1266 UNLOCK;
1267 SvREFCNT_dec (next_sv);
1268 /* coro_nready is already taken care of by destroy */
1269 continue;
1270 }
1271
1272 --coro_nready;
1273 UNLOCK;
1274 break;
1275 }
1276
1277 /* free this only after the transfer */
1278 prev_sv = SvRV (coro_current); 1852 SV *prev_sv = SvRV (coro_current);
1853
1279 ta->prev = SvSTATE (prev_sv); 1854 ta->prev = SvSTATE_hv (prev_sv);
1855 ta->next = next;
1856
1280 TRANSFER_CHECK (*ta); 1857 TRANSFER_CHECK (*ta);
1281 assert (ta->next->flags & CF_READY); 1858
1282 ta->next->flags &= ~CF_READY;
1283 SvRV_set (coro_current, next_sv); 1859 SvRV_set (coro_current, (SV *)next->hv);
1284 1860
1285 LOCK;
1286 free_coro_mortal (aTHX); 1861 free_coro_mortal (aTHX);
1287 coro_mortal = prev_sv; 1862 coro_mortal = prev_sv;
1288 UNLOCK;
1289} 1863}
1290 1864
1291static void 1865static void
1866prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1867{
1868 for (;;)
1869 {
1870 struct coro *next = coro_deq (aTHX);
1871
1872 if (expect_true (next))
1873 {
1874 /* cannot transfer to destroyed coros, skip and look for next */
1875 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1876 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1877 else
1878 {
1879 next->flags &= ~CF_READY;
1880 --coro_nready;
1881
1882 prepare_schedule_to (aTHX_ ta, next);
1883 break;
1884 }
1885 }
1886 else
1887 {
1888 /* nothing to schedule: call the idle handler */
1889 if (SvROK (sv_idle)
1890 && SvOBJECT (SvRV (sv_idle)))
1891 {
1892 if (SvRV (sv_idle) == SvRV (coro_current))
1893 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1894
1895 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1896 api_ready (aTHX_ SvRV (sv_idle));
1897 --coro_nready;
1898 }
1899 else
1900 {
1901 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1902 dSP;
1903
1904 ENTER;
1905 SAVETMPS;
1906
1907 PUSHMARK (SP);
1908 PUTBACK;
1909 call_sv (sv_idle, G_VOID | G_DISCARD);
1910
1911 FREETMPS;
1912 LEAVE;
1913 }
1914 }
1915 }
1916}
1917
1918INLINE void
1292prepare_cede (pTHX_ struct transfer_args *ta) 1919prepare_cede (pTHX_ struct coro_transfer_args *ta)
1293{ 1920{
1294 api_ready (coro_current); 1921 api_ready (aTHX_ coro_current);
1295 prepare_schedule (aTHX_ ta); 1922 prepare_schedule (aTHX_ ta);
1296} 1923}
1297 1924
1925INLINE void
1926prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1927{
1928 SV *prev = SvRV (coro_current);
1929
1930 if (coro_nready)
1931 {
1932 prepare_schedule (aTHX_ ta);
1933 api_ready (aTHX_ prev);
1934 }
1935 else
1936 prepare_nop (aTHX_ ta);
1937}
1938
1939static void
1940api_schedule (pTHX)
1941{
1942 struct coro_transfer_args ta;
1943
1944 prepare_schedule (aTHX_ &ta);
1945 TRANSFER (ta, 1);
1946}
1947
1948static void
1949api_schedule_to (pTHX_ SV *coro_sv)
1950{
1951 struct coro_transfer_args ta;
1952 struct coro *next = SvSTATE (coro_sv);
1953
1954 SvREFCNT_inc_NN (coro_sv);
1955 prepare_schedule_to (aTHX_ &ta, next);
1956}
1957
1298static int 1958static int
1299prepare_cede_notself (pTHX_ struct transfer_args *ta) 1959api_cede (pTHX)
1300{ 1960{
1301 if (coro_nready) 1961 struct coro_transfer_args ta;
1302 { 1962
1303 SV *prev = SvRV (coro_current);
1304 prepare_schedule (aTHX_ ta); 1963 prepare_cede (aTHX_ &ta);
1305 api_ready (prev); 1964
1965 if (expect_true (ta.prev != ta.next))
1966 {
1967 TRANSFER (ta, 1);
1306 return 1; 1968 return 1;
1307 } 1969 }
1308 else 1970 else
1309 return 0; 1971 return 0;
1310} 1972}
1311 1973
1312static void
1313api_schedule (void)
1314{
1315 dTHX;
1316 struct transfer_args ta;
1317
1318 prepare_schedule (aTHX_ &ta);
1319 TRANSFER (ta);
1320}
1321
1322static int 1974static int
1323api_cede (void) 1975api_cede_notself (pTHX)
1324{ 1976{
1325 dTHX; 1977 if (coro_nready)
1978 {
1326 struct transfer_args ta; 1979 struct coro_transfer_args ta;
1327 1980
1328 prepare_cede (aTHX_ &ta); 1981 prepare_cede_notself (aTHX_ &ta);
1329
1330 if (ta.prev != ta.next)
1331 {
1332 TRANSFER (ta); 1982 TRANSFER (ta, 1);
1333 return 1; 1983 return 1;
1334 } 1984 }
1335 else 1985 else
1336 return 0; 1986 return 0;
1337} 1987}
1338 1988
1339static int 1989static void
1340api_cede_notself (void)
1341{
1342 dTHX;
1343 struct transfer_args ta;
1344
1345 if (prepare_cede_notself (aTHX_ &ta))
1346 {
1347 TRANSFER (ta);
1348 return 1;
1349 }
1350 else
1351 return 0;
1352}
1353
1354static void
1355api_trace (SV *coro_sv, int flags) 1990api_trace (pTHX_ SV *coro_sv, int flags)
1356{ 1991{
1357 dTHX;
1358 struct coro *coro = SvSTATE (coro_sv); 1992 struct coro *coro = SvSTATE (coro_sv);
1359 1993
1994 if (coro->flags & CF_RUNNING)
1995 croak ("cannot enable tracing on a running coroutine, caught");
1996
1360 if (flags & CC_TRACE) 1997 if (flags & CC_TRACE)
1361 { 1998 {
1362 if (!coro->cctx) 1999 if (!coro->cctx)
1363 coro->cctx = cctx_new (); 2000 coro->cctx = cctx_new_run ();
1364 else if (!(coro->cctx->flags & CC_TRACE)) 2001 else if (!(coro->cctx->flags & CC_TRACE))
1365 croak ("cannot enable tracing on coroutine with custom stack"); 2002 croak ("cannot enable tracing on coroutine with custom stack, caught");
1366 2003
1367 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 2004 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1368 } 2005 }
1369 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 2006 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1370 { 2007 {
1371 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL); 2008 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1372 2009
1373 if (coro->flags & CF_RUNNING) 2010 if (coro->flags & CF_RUNNING)
1374 PL_runops = RUNOPS_DEFAULT; 2011 PL_runops = RUNOPS_DEFAULT;
1375 else 2012 else
1376 coro->runops = RUNOPS_DEFAULT; 2013 coro->slot->runops = RUNOPS_DEFAULT;
2014 }
2015}
2016
2017static void
2018coro_call_on_destroy (pTHX_ struct coro *coro)
2019{
2020 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
2021
2022 if (on_destroyp)
2023 {
2024 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
2025 AV *on_destroy = sv_2mortal (SvREFCNT_inc ((AV *)SvRV (*on_destroyp)));
2026 AV *status = statusp ? sv_2mortal (SvREFCNT_inc ((AV *)SvRV (*statusp))) : 0;
2027
2028 while (AvFILLp (on_destroy) >= 0)
2029 {
2030 dSP; /* don't disturb outer sp */
2031 SV *cb = av_pop (on_destroy);
2032
2033 PUSHMARK (SP);
2034
2035 if (statusp)
2036 {
2037 int i;
2038 EXTEND (SP, AvFILLp (status) + 1);
2039
2040 for (i = 0; i <= AvFILLp (status); ++i)
2041 PUSHs (AvARRAY (status)[i]);
2042 }
2043
2044 PUTBACK;
2045 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
2046 }
2047 }
2048}
2049
2050static void
2051coro_set_status (HV *coro_hv, SV **arg, int items)
2052{
2053 AV *av = newAV ();
2054
2055 /* items are actually not so common, so optimise for this case */
2056 if (items)
2057 {
2058 int i;
2059
2060 av_extend (av, items - 1);
2061
2062 for (i = 0; i < items; ++i)
2063 av_push (av, SvREFCNT_inc_NN (arg [i]));
2064 }
2065
2066 hv_store (coro_hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
2067}
2068
2069static void
2070slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2071{
2072 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2073 api_ready (aTHX_ sv_manager);
2074
2075 frame->prepare = prepare_schedule;
2076 frame->check = slf_check_repeat;
2077
2078 /* as a minor optimisation, we could unwind all stacks here */
2079 /* but that puts extra pressure on pp_slf, and is not worth much */
2080 /*coro_unwind_stacks (aTHX);*/
2081}
2082
2083static void
2084slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2085{
2086 HV *coro_hv = (HV *)SvRV (coro_current);
2087
2088 coro_set_status (coro_hv, arg, items);
2089 slf_init_terminate_cancel_common (frame, coro_hv);
2090}
2091
2092static void
2093slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2094{
2095 HV *coro_hv;
2096 struct coro *coro;
2097
2098 if (items <= 0)
2099 croak ("Coro::cancel called without coro object,");
2100
2101 coro = SvSTATE (arg [0]);
2102 coro_hv = coro->hv;
2103
2104 coro_set_status (coro_hv, arg + 1, items - 1);
2105
2106 if (expect_false (coro->flags & CF_NOCANCEL))
2107 {
2108 /* coro currently busy cancelling something, so just notify it */
2109 coro->slf_frame.data = (void *)coro;
2110
2111 frame->prepare = prepare_nop;
2112 frame->check = slf_check_nop;
2113 }
2114 else if (coro_hv == (HV *)SvRV (coro_current))
2115 {
2116 /* cancelling the current coro is allowed, and equals terminate */
2117 slf_init_terminate_cancel_common (frame, coro_hv);
2118 }
2119 else
2120 {
2121 struct coro *self = SvSTATE_current;
2122
2123 /* otherwise we cancel directly, purely for speed reasons
2124 * unfortunately, this requires some magic trickery, as
2125 * somebody else could cancel us, so we have to fight the cancellation.
2126 * this is ugly, and hopefully fully worth the extra speed.
2127 * besides, I can't get the slow-but-safe version working...
2128 */
2129 slf_frame.data = 0;
2130 self->flags |= CF_NOCANCEL;
2131
2132 coro_state_destroy (aTHX_ coro);
2133 coro_call_on_destroy (aTHX_ coro);
2134
2135 self->flags &= ~CF_NOCANCEL;
2136
2137 if (slf_frame.data)
2138 {
2139 /* while we were busy we have been cancelled, so terminate */
2140 slf_init_terminate_cancel_common (frame, self->hv);
2141 }
2142 else
2143 {
2144 frame->prepare = prepare_nop;
2145 frame->check = slf_check_nop;
2146 }
2147 }
2148}
2149
2150/*****************************************************************************/
2151/* async pool handler */
2152
2153static int
2154slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2155{
2156 HV *hv = (HV *)SvRV (coro_current);
2157 struct coro *coro = (struct coro *)frame->data;
2158
2159 if (!coro->invoke_cb)
2160 return 1; /* loop till we have invoke */
2161 else
2162 {
2163 hv_store (hv, "desc", sizeof ("desc") - 1,
2164 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2165
2166 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2167
2168 {
2169 dSP;
2170 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2171 PUTBACK;
1377 } 2172 }
2173
2174 SvREFCNT_dec (GvAV (PL_defgv));
2175 GvAV (PL_defgv) = coro->invoke_av;
2176 coro->invoke_av = 0;
2177
2178 return 0;
2179 }
2180}
2181
2182static void
2183slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2184{
2185 HV *hv = (HV *)SvRV (coro_current);
2186 struct coro *coro = SvSTATE_hv ((SV *)hv);
2187
2188 if (expect_true (coro->saved_deffh))
2189 {
2190 /* subsequent iteration */
2191 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2192 coro->saved_deffh = 0;
2193
2194 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2195 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2196 {
2197 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
2198 coro->invoke_av = newAV ();
2199
2200 frame->prepare = prepare_nop;
2201 }
2202 else
2203 {
2204 av_clear (GvAV (PL_defgv));
2205 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2206
2207 coro->prio = 0;
2208
2209 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2210 api_trace (aTHX_ coro_current, 0);
2211
2212 frame->prepare = prepare_schedule;
2213 av_push (av_async_pool, SvREFCNT_inc (hv));
2214 }
2215 }
2216 else
2217 {
2218 /* first iteration, simply fall through */
2219 frame->prepare = prepare_nop;
2220 }
2221
2222 frame->check = slf_check_pool_handler;
2223 frame->data = (void *)coro;
2224}
2225
2226/*****************************************************************************/
2227/* rouse callback */
2228
2229#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2230
2231static void
2232coro_rouse_callback (pTHX_ CV *cv)
2233{
2234 dXSARGS;
2235 SV *data = (SV *)S_GENSUB_ARG;
2236
2237 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2238 {
2239 /* first call, set args */
2240 SV *coro = SvRV (data);
2241 AV *av = newAV ();
2242
2243 SvRV_set (data, (SV *)av);
2244
2245 /* better take a full copy of the arguments */
2246 while (items--)
2247 av_store (av, items, newSVsv (ST (items)));
2248
2249 api_ready (aTHX_ coro);
2250 SvREFCNT_dec (coro);
2251 }
2252
2253 XSRETURN_EMPTY;
2254}
2255
2256static int
2257slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2258{
2259 SV *data = (SV *)frame->data;
2260
2261 if (CORO_THROW)
2262 return 0;
2263
2264 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2265 return 1;
2266
2267 /* now push all results on the stack */
2268 {
2269 dSP;
2270 AV *av = (AV *)SvRV (data);
2271 int i;
2272
2273 EXTEND (SP, AvFILLp (av) + 1);
2274 for (i = 0; i <= AvFILLp (av); ++i)
2275 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2276
2277 /* we have stolen the elements, so set length to zero and free */
2278 AvFILLp (av) = -1;
2279 av_undef (av);
2280
2281 PUTBACK;
2282 }
2283
2284 return 0;
2285}
2286
2287static void
2288slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2289{
2290 SV *cb;
2291
2292 if (items)
2293 cb = arg [0];
2294 else
2295 {
2296 struct coro *coro = SvSTATE_current;
2297
2298 if (!coro->rouse_cb)
2299 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2300
2301 cb = sv_2mortal (coro->rouse_cb);
2302 coro->rouse_cb = 0;
2303 }
2304
2305 if (!SvROK (cb)
2306 || SvTYPE (SvRV (cb)) != SVt_PVCV
2307 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2308 croak ("Coro::rouse_wait called with illegal callback argument,");
2309
2310 {
2311 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2312 SV *data = (SV *)S_GENSUB_ARG;
2313
2314 frame->data = (void *)data;
2315 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2316 frame->check = slf_check_rouse_wait;
2317 }
2318}
2319
2320static SV *
2321coro_new_rouse_cb (pTHX)
2322{
2323 HV *hv = (HV *)SvRV (coro_current);
2324 struct coro *coro = SvSTATE_hv (hv);
2325 SV *data = newRV_inc ((SV *)hv);
2326 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2327
2328 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2329 SvREFCNT_dec (data); /* magicext increases the refcount */
2330
2331 SvREFCNT_dec (coro->rouse_cb);
2332 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2333
2334 return cb;
2335}
2336
2337/*****************************************************************************/
2338/* schedule-like-function opcode (SLF) */
2339
2340static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2341static const CV *slf_cv;
2342static SV **slf_argv;
2343static int slf_argc, slf_arga; /* count, allocated */
2344static I32 slf_ax; /* top of stack, for restore */
2345
2346/* this restores the stack in the case we patched the entersub, to */
2347/* recreate the stack frame as perl will on following calls */
2348/* since entersub cleared the stack */
2349static OP *
2350pp_restore (pTHX)
2351{
2352 int i;
2353 SV **SP = PL_stack_base + slf_ax;
2354
2355 PUSHMARK (SP);
2356
2357 EXTEND (SP, slf_argc + 1);
2358
2359 for (i = 0; i < slf_argc; ++i)
2360 PUSHs (sv_2mortal (slf_argv [i]));
2361
2362 PUSHs ((SV *)CvGV (slf_cv));
2363
2364 RETURNOP (slf_restore.op_first);
2365}
2366
2367static void
2368slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2369{
2370 SV **arg = (SV **)slf_frame.data;
2371
2372 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2373}
2374
2375static void
2376slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2377{
2378 if (items != 2)
2379 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2380
2381 frame->prepare = slf_prepare_transfer;
2382 frame->check = slf_check_nop;
2383 frame->data = (void *)arg; /* let's hope it will stay valid */
2384}
2385
2386static void
2387slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2388{
2389 frame->prepare = prepare_schedule;
2390 frame->check = slf_check_nop;
2391}
2392
2393static void
2394slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2395{
2396 struct coro *next = (struct coro *)slf_frame.data;
2397
2398 SvREFCNT_inc_NN (next->hv);
2399 prepare_schedule_to (aTHX_ ta, next);
2400}
2401
2402static void
2403slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2404{
2405 if (!items)
2406 croak ("Coro::schedule_to expects a coroutine argument, caught");
2407
2408 frame->data = (void *)SvSTATE (arg [0]);
2409 frame->prepare = slf_prepare_schedule_to;
2410 frame->check = slf_check_nop;
2411}
2412
2413static void
2414slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2415{
2416 api_ready (aTHX_ SvRV (coro_current));
2417
2418 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2419}
2420
2421static void
2422slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2423{
2424 frame->prepare = prepare_cede;
2425 frame->check = slf_check_nop;
2426}
2427
2428static void
2429slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2430{
2431 frame->prepare = prepare_cede_notself;
2432 frame->check = slf_check_nop;
2433}
2434
2435/*
2436 * these not obviously related functions are all rolled into one
2437 * function to increase chances that they all will call transfer with the same
2438 * stack offset
2439 * SLF stands for "schedule-like-function".
2440 */
2441static OP *
2442pp_slf (pTHX)
2443{
2444 I32 checkmark; /* mark SP to see how many elements check has pushed */
2445
2446 /* set up the slf frame, unless it has already been set-up */
2447 /* the latter happens when a new coro has been started */
2448 /* or when a new cctx was attached to an existing coroutine */
2449 if (expect_true (!slf_frame.prepare))
2450 {
2451 /* first iteration */
2452 dSP;
2453 SV **arg = PL_stack_base + TOPMARK + 1;
2454 int items = SP - arg; /* args without function object */
2455 SV *gv = *sp;
2456
2457 /* do a quick consistency check on the "function" object, and if it isn't */
2458 /* for us, divert to the real entersub */
2459 if (SvTYPE (gv) != SVt_PVGV
2460 || !GvCV (gv)
2461 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2462 return PL_ppaddr[OP_ENTERSUB](aTHX);
2463
2464 if (!(PL_op->op_flags & OPf_STACKED))
2465 {
2466 /* ampersand-form of call, use @_ instead of stack */
2467 AV *av = GvAV (PL_defgv);
2468 arg = AvARRAY (av);
2469 items = AvFILLp (av) + 1;
2470 }
2471
2472 /* now call the init function, which needs to set up slf_frame */
2473 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2474 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2475
2476 /* pop args */
2477 SP = PL_stack_base + POPMARK;
2478
2479 PUTBACK;
2480 }
2481
2482 /* now that we have a slf_frame, interpret it! */
2483 /* we use a callback system not to make the code needlessly */
2484 /* complicated, but so we can run multiple perl coros from one cctx */
2485
2486 do
2487 {
2488 struct coro_transfer_args ta;
2489
2490 slf_frame.prepare (aTHX_ &ta);
2491 TRANSFER (ta, 0);
2492
2493 checkmark = PL_stack_sp - PL_stack_base;
2494 }
2495 while (slf_frame.check (aTHX_ &slf_frame));
2496
2497 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2498
2499 /* exception handling */
2500 if (expect_false (CORO_THROW))
2501 {
2502 SV *exception = sv_2mortal (CORO_THROW);
2503
2504 CORO_THROW = 0;
2505 sv_setsv (ERRSV, exception);
2506 croak (0);
2507 }
2508
2509 /* return value handling - mostly like entersub */
2510 /* make sure we put something on the stack in scalar context */
2511 if (GIMME_V == G_SCALAR)
2512 {
2513 dSP;
2514 SV **bot = PL_stack_base + checkmark;
2515
2516 if (sp == bot) /* too few, push undef */
2517 bot [1] = &PL_sv_undef;
2518 else if (sp != bot + 1) /* too many, take last one */
2519 bot [1] = *sp;
2520
2521 SP = bot + 1;
2522
2523 PUTBACK;
2524 }
2525
2526 return NORMAL;
2527}
2528
2529static void
2530api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2531{
2532 int i;
2533 SV **arg = PL_stack_base + ax;
2534 int items = PL_stack_sp - arg + 1;
2535
2536 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2537
2538 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2539 && PL_op->op_ppaddr != pp_slf)
2540 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2541
2542 CvFLAGS (cv) |= CVf_SLF;
2543 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2544 slf_cv = cv;
2545
2546 /* we patch the op, and then re-run the whole call */
2547 /* we have to put the same argument on the stack for this to work */
2548 /* and this will be done by pp_restore */
2549 slf_restore.op_next = (OP *)&slf_restore;
2550 slf_restore.op_type = OP_CUSTOM;
2551 slf_restore.op_ppaddr = pp_restore;
2552 slf_restore.op_first = PL_op;
2553
2554 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2555
2556 if (PL_op->op_flags & OPf_STACKED)
2557 {
2558 if (items > slf_arga)
2559 {
2560 slf_arga = items;
2561 Safefree (slf_argv);
2562 New (0, slf_argv, slf_arga, SV *);
2563 }
2564
2565 slf_argc = items;
2566
2567 for (i = 0; i < items; ++i)
2568 slf_argv [i] = SvREFCNT_inc (arg [i]);
2569 }
2570 else
2571 slf_argc = 0;
2572
2573 PL_op->op_ppaddr = pp_slf;
2574 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2575
2576 PL_op = (OP *)&slf_restore;
2577}
2578
2579/*****************************************************************************/
2580/* dynamic wind */
2581
2582static void
2583on_enterleave_call (pTHX_ SV *cb)
2584{
2585 dSP;
2586
2587 PUSHSTACK;
2588
2589 PUSHMARK (SP);
2590 PUTBACK;
2591 call_sv (cb, G_VOID | G_DISCARD);
2592 SPAGAIN;
2593
2594 POPSTACK;
2595}
2596
2597static SV *
2598coro_avp_pop_and_free (pTHX_ AV **avp)
2599{
2600 AV *av = *avp;
2601 SV *res = av_pop (av);
2602
2603 if (AvFILLp (av) < 0)
2604 {
2605 *avp = 0;
2606 SvREFCNT_dec (av);
2607 }
2608
2609 return res;
2610}
2611
2612static void
2613coro_pop_on_enter (pTHX_ void *coro)
2614{
2615 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2616 SvREFCNT_dec (cb);
2617}
2618
2619static void
2620coro_pop_on_leave (pTHX_ void *coro)
2621{
2622 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2623 on_enterleave_call (aTHX_ sv_2mortal (cb));
2624}
2625
2626/*****************************************************************************/
2627/* PerlIO::cede */
2628
2629typedef struct
2630{
2631 PerlIOBuf base;
2632 NV next, every;
2633} PerlIOCede;
2634
2635static IV
2636PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2637{
2638 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2639
2640 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2641 self->next = nvtime () + self->every;
2642
2643 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2644}
2645
2646static SV *
2647PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2648{
2649 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2650
2651 return newSVnv (self->every);
2652}
2653
2654static IV
2655PerlIOCede_flush (pTHX_ PerlIO *f)
2656{
2657 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2658 double now = nvtime ();
2659
2660 if (now >= self->next)
2661 {
2662 api_cede (aTHX);
2663 self->next = now + self->every;
2664 }
2665
2666 return PerlIOBuf_flush (aTHX_ f);
2667}
2668
2669static PerlIO_funcs PerlIO_cede =
2670{
2671 sizeof(PerlIO_funcs),
2672 "cede",
2673 sizeof(PerlIOCede),
2674 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2675 PerlIOCede_pushed,
2676 PerlIOBuf_popped,
2677 PerlIOBuf_open,
2678 PerlIOBase_binmode,
2679 PerlIOCede_getarg,
2680 PerlIOBase_fileno,
2681 PerlIOBuf_dup,
2682 PerlIOBuf_read,
2683 PerlIOBuf_unread,
2684 PerlIOBuf_write,
2685 PerlIOBuf_seek,
2686 PerlIOBuf_tell,
2687 PerlIOBuf_close,
2688 PerlIOCede_flush,
2689 PerlIOBuf_fill,
2690 PerlIOBase_eof,
2691 PerlIOBase_error,
2692 PerlIOBase_clearerr,
2693 PerlIOBase_setlinebuf,
2694 PerlIOBuf_get_base,
2695 PerlIOBuf_bufsiz,
2696 PerlIOBuf_get_ptr,
2697 PerlIOBuf_get_cnt,
2698 PerlIOBuf_set_ptrcnt,
2699};
2700
2701/*****************************************************************************/
2702/* Coro::Semaphore & Coro::Signal */
2703
2704static SV *
2705coro_waitarray_new (pTHX_ int count)
2706{
2707 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2708 AV *av = newAV ();
2709 SV **ary;
2710
2711 /* unfortunately, building manually saves memory */
2712 Newx (ary, 2, SV *);
2713 AvALLOC (av) = ary;
2714#if PERL_VERSION_ATLEAST (5,10,0)
2715 AvARRAY (av) = ary;
2716#else
2717 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2718 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2719 SvPVX ((SV *)av) = (char *)ary;
2720#endif
2721 AvMAX (av) = 1;
2722 AvFILLp (av) = 0;
2723 ary [0] = newSViv (count);
2724
2725 return newRV_noinc ((SV *)av);
2726}
2727
2728/* semaphore */
2729
2730static void
2731coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2732{
2733 SV *count_sv = AvARRAY (av)[0];
2734 IV count = SvIVX (count_sv);
2735
2736 count += adjust;
2737 SvIVX (count_sv) = count;
2738
2739 /* now wake up as many waiters as are expected to lock */
2740 while (count > 0 && AvFILLp (av) > 0)
2741 {
2742 SV *cb;
2743
2744 /* swap first two elements so we can shift a waiter */
2745 AvARRAY (av)[0] = AvARRAY (av)[1];
2746 AvARRAY (av)[1] = count_sv;
2747 cb = av_shift (av);
2748
2749 if (SvOBJECT (cb))
2750 {
2751 api_ready (aTHX_ cb);
2752 --count;
2753 }
2754 else if (SvTYPE (cb) == SVt_PVCV)
2755 {
2756 dSP;
2757 PUSHMARK (SP);
2758 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2759 PUTBACK;
2760 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2761 }
2762
2763 SvREFCNT_dec (cb);
2764 }
2765}
2766
2767static void
2768coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2769{
2770 /* call $sem->adjust (0) to possibly wake up some other waiters */
2771 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2772}
2773
2774static int
2775slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2776{
2777 AV *av = (AV *)frame->data;
2778 SV *count_sv = AvARRAY (av)[0];
2779
2780 /* if we are about to throw, don't actually acquire the lock, just throw */
2781 if (CORO_THROW)
2782 return 0;
2783 else if (SvIVX (count_sv) > 0)
2784 {
2785 SvSTATE_current->on_destroy = 0;
2786
2787 if (acquire)
2788 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2789 else
2790 coro_semaphore_adjust (aTHX_ av, 0);
2791
2792 return 0;
2793 }
2794 else
2795 {
2796 int i;
2797 /* if we were woken up but can't down, we look through the whole */
2798 /* waiters list and only add us if we aren't in there already */
2799 /* this avoids some degenerate memory usage cases */
2800
2801 for (i = 1; i <= AvFILLp (av); ++i)
2802 if (AvARRAY (av)[i] == SvRV (coro_current))
2803 return 1;
2804
2805 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2806 return 1;
2807 }
2808}
2809
2810static int
2811slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2812{
2813 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2814}
2815
2816static int
2817slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2818{
2819 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2820}
2821
2822static void
2823slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2824{
2825 AV *av = (AV *)SvRV (arg [0]);
2826
2827 if (SvIVX (AvARRAY (av)[0]) > 0)
2828 {
2829 frame->data = (void *)av;
2830 frame->prepare = prepare_nop;
2831 }
2832 else
2833 {
2834 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2835
2836 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2837 frame->prepare = prepare_schedule;
2838
2839 /* to avoid race conditions when a woken-up coro gets terminated */
2840 /* we arrange for a temporary on_destroy that calls adjust (0) */
2841 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2842 }
2843}
2844
2845static void
2846slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2847{
2848 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2849 frame->check = slf_check_semaphore_down;
2850}
2851
2852static void
2853slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2854{
2855 if (items >= 2)
2856 {
2857 /* callback form */
2858 AV *av = (AV *)SvRV (arg [0]);
2859 SV *cb_cv = s_get_cv_croak (arg [1]);
2860
2861 av_push (av, SvREFCNT_inc_NN (cb_cv));
2862
2863 if (SvIVX (AvARRAY (av)[0]) > 0)
2864 coro_semaphore_adjust (aTHX_ av, 0);
2865
2866 frame->prepare = prepare_nop;
2867 frame->check = slf_check_nop;
2868 }
2869 else
2870 {
2871 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2872 frame->check = slf_check_semaphore_wait;
2873 }
2874}
2875
2876/* signal */
2877
2878static void
2879coro_signal_wake (pTHX_ AV *av, int count)
2880{
2881 SvIVX (AvARRAY (av)[0]) = 0;
2882
2883 /* now signal count waiters */
2884 while (count > 0 && AvFILLp (av) > 0)
2885 {
2886 SV *cb;
2887
2888 /* swap first two elements so we can shift a waiter */
2889 cb = AvARRAY (av)[0];
2890 AvARRAY (av)[0] = AvARRAY (av)[1];
2891 AvARRAY (av)[1] = cb;
2892
2893 cb = av_shift (av);
2894
2895 if (SvTYPE (cb) == SVt_PVCV)
2896 {
2897 dSP;
2898 PUSHMARK (SP);
2899 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2900 PUTBACK;
2901 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2902 }
2903 else
2904 {
2905 api_ready (aTHX_ cb);
2906 sv_setiv (cb, 0); /* signal waiter */
2907 }
2908
2909 SvREFCNT_dec (cb);
2910
2911 --count;
2912 }
2913}
2914
2915static int
2916slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2917{
2918 /* if we are about to throw, also stop waiting */
2919 return SvROK ((SV *)frame->data) && !CORO_THROW;
2920}
2921
2922static void
2923slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2924{
2925 AV *av = (AV *)SvRV (arg [0]);
2926
2927 if (items >= 2)
2928 {
2929 SV *cb_cv = s_get_cv_croak (arg [1]);
2930 av_push (av, SvREFCNT_inc_NN (cb_cv));
2931
2932 if (SvIVX (AvARRAY (av)[0]))
2933 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
2934
2935 frame->prepare = prepare_nop;
2936 frame->check = slf_check_nop;
2937 }
2938 else if (SvIVX (AvARRAY (av)[0]))
2939 {
2940 SvIVX (AvARRAY (av)[0]) = 0;
2941 frame->prepare = prepare_nop;
2942 frame->check = slf_check_nop;
2943 }
2944 else
2945 {
2946 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2947
2948 av_push (av, waiter);
2949
2950 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2951 frame->prepare = prepare_schedule;
2952 frame->check = slf_check_signal_wait;
2953 }
2954}
2955
2956/*****************************************************************************/
2957/* Coro::AIO */
2958
2959#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2960
2961/* helper storage struct */
2962struct io_state
2963{
2964 int errorno;
2965 I32 laststype; /* U16 in 5.10.0 */
2966 int laststatval;
2967 Stat_t statcache;
2968};
2969
2970static void
2971coro_aio_callback (pTHX_ CV *cv)
2972{
2973 dXSARGS;
2974 AV *state = (AV *)S_GENSUB_ARG;
2975 SV *coro = av_pop (state);
2976 SV *data_sv = newSV (sizeof (struct io_state));
2977
2978 av_extend (state, items - 1);
2979
2980 sv_upgrade (data_sv, SVt_PV);
2981 SvCUR_set (data_sv, sizeof (struct io_state));
2982 SvPOK_only (data_sv);
2983
2984 {
2985 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2986
2987 data->errorno = errno;
2988 data->laststype = PL_laststype;
2989 data->laststatval = PL_laststatval;
2990 data->statcache = PL_statcache;
2991 }
2992
2993 /* now build the result vector out of all the parameters and the data_sv */
2994 {
2995 int i;
2996
2997 for (i = 0; i < items; ++i)
2998 av_push (state, SvREFCNT_inc_NN (ST (i)));
2999 }
3000
3001 av_push (state, data_sv);
3002
3003 api_ready (aTHX_ coro);
3004 SvREFCNT_dec (coro);
3005 SvREFCNT_dec ((AV *)state);
3006}
3007
3008static int
3009slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3010{
3011 AV *state = (AV *)frame->data;
3012
3013 /* if we are about to throw, return early */
3014 /* this does not cancel the aio request, but at least */
3015 /* it quickly returns */
3016 if (CORO_THROW)
3017 return 0;
3018
3019 /* one element that is an RV? repeat! */
3020 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3021 return 1;
3022
3023 /* restore status */
3024 {
3025 SV *data_sv = av_pop (state);
3026 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3027
3028 errno = data->errorno;
3029 PL_laststype = data->laststype;
3030 PL_laststatval = data->laststatval;
3031 PL_statcache = data->statcache;
3032
3033 SvREFCNT_dec (data_sv);
3034 }
3035
3036 /* push result values */
3037 {
3038 dSP;
3039 int i;
3040
3041 EXTEND (SP, AvFILLp (state) + 1);
3042 for (i = 0; i <= AvFILLp (state); ++i)
3043 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3044
3045 PUTBACK;
3046 }
3047
3048 return 0;
3049}
3050
3051static void
3052slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3053{
3054 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3055 SV *coro_hv = SvRV (coro_current);
3056 struct coro *coro = SvSTATE_hv (coro_hv);
3057
3058 /* put our coroutine id on the state arg */
3059 av_push (state, SvREFCNT_inc_NN (coro_hv));
3060
3061 /* first see whether we have a non-zero priority and set it as AIO prio */
3062 if (coro->prio)
3063 {
3064 dSP;
3065
3066 static SV *prio_cv;
3067 static SV *prio_sv;
3068
3069 if (expect_false (!prio_cv))
3070 {
3071 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3072 prio_sv = newSViv (0);
3073 }
3074
3075 PUSHMARK (SP);
3076 sv_setiv (prio_sv, coro->prio);
3077 XPUSHs (prio_sv);
3078
3079 PUTBACK;
3080 call_sv (prio_cv, G_VOID | G_DISCARD);
3081 }
3082
3083 /* now call the original request */
3084 {
3085 dSP;
3086 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3087 int i;
3088
3089 PUSHMARK (SP);
3090
3091 /* first push all args to the stack */
3092 EXTEND (SP, items + 1);
3093
3094 for (i = 0; i < items; ++i)
3095 PUSHs (arg [i]);
3096
3097 /* now push the callback closure */
3098 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3099
3100 /* now call the AIO function - we assume our request is uncancelable */
3101 PUTBACK;
3102 call_sv ((SV *)req, G_VOID | G_DISCARD);
3103 }
3104
3105 /* now that the request is going, we loop till we have a result */
3106 frame->data = (void *)state;
3107 frame->prepare = prepare_schedule;
3108 frame->check = slf_check_aio_req;
3109}
3110
3111static void
3112coro_aio_req_xs (pTHX_ CV *cv)
3113{
3114 dXSARGS;
3115
3116 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3117
3118 XSRETURN_EMPTY;
3119}
3120
3121/*****************************************************************************/
3122
3123#if CORO_CLONE
3124# include "clone.c"
3125#endif
3126
3127/*****************************************************************************/
3128
3129static SV *
3130coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3131{
3132 SV *coro_sv;
3133 struct coro *coro;
3134 MAGIC *mg;
3135 HV *hv;
3136 SV *cb;
3137 int i;
3138
3139 if (argc > 0)
3140 {
3141 cb = s_get_cv_croak (argv [0]);
3142
3143 if (!is_coro)
3144 {
3145 if (CvISXSUB (cb))
3146 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3147
3148 if (!CvROOT (cb))
3149 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3150 }
3151 }
3152
3153 Newz (0, coro, 1, struct coro);
3154 coro->args = newAV ();
3155 coro->flags = CF_NEW;
3156
3157 if (coro_first) coro_first->prev = coro;
3158 coro->next = coro_first;
3159 coro_first = coro;
3160
3161 coro->hv = hv = newHV ();
3162 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3163 mg->mg_flags |= MGf_DUP;
3164 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3165
3166 if (argc > 0)
3167 {
3168 av_extend (coro->args, argc + is_coro - 1);
3169
3170 if (is_coro)
3171 {
3172 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3173 cb = (SV *)cv_coro_run;
3174 }
3175
3176 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3177
3178 for (i = 1; i < argc; i++)
3179 av_push (coro->args, newSVsv (argv [i]));
3180 }
3181
3182 return coro_sv;
1378} 3183}
1379 3184
1380MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 3185MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1381 3186
1382PROTOTYPES: DISABLE 3187PROTOTYPES: DISABLE
1383 3188
1384BOOT: 3189BOOT:
1385{ 3190{
1386#ifdef USE_ITHREADS 3191#ifdef USE_ITHREADS
1387 MUTEX_INIT (&coro_mutex); 3192# if CORO_PTHREAD
3193 coro_thx = PERL_GET_CONTEXT;
3194# endif
1388#endif 3195#endif
1389 BOOT_PAGESIZE; 3196 BOOT_PAGESIZE;
1390 3197
3198 cctx_current = cctx_new_empty ();
3199
1391 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 3200 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1392 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 3201 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3202
3203 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3204 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3205 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3206
3207 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3208 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3209 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1393 3210
1394 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3211 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1395 3212
1396 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE)); 3213 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1397 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB)); 3214 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
… …
1402 main_top_env = PL_top_env; 3219 main_top_env = PL_top_env;
1403 3220
1404 while (main_top_env->je_prev) 3221 while (main_top_env->je_prev)
1405 main_top_env = main_top_env->je_prev; 3222 main_top_env = main_top_env->je_prev;
1406 3223
3224 {
3225 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3226
3227 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3228 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3229
3230 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3231 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3232 }
3233
1407 coroapi.ver = CORO_API_VERSION; 3234 coroapi.ver = CORO_API_VERSION;
3235 coroapi.rev = CORO_API_REVISION;
3236
1408 coroapi.transfer = api_transfer; 3237 coroapi.transfer = api_transfer;
1409 3238
3239 coroapi.sv_state = SvSTATE_;
3240 coroapi.execute_slf = api_execute_slf;
3241 coroapi.prepare_nop = prepare_nop;
3242 coroapi.prepare_schedule = prepare_schedule;
3243 coroapi.prepare_cede = prepare_cede;
3244 coroapi.prepare_cede_notself = prepare_cede_notself;
3245
3246 time_init (aTHX);
3247
1410 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3248 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
1411} 3249}
1412 3250
1413SV * 3251SV *
1414new (char *klass, ...) 3252new (SV *klass, ...)
3253 ALIAS:
3254 Coro::new = 1
1415 CODE: 3255 CODE:
1416{ 3256 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1417 struct coro *coro;
1418 HV *hv;
1419 int i;
1420
1421 Newz (0, coro, 1, struct coro);
1422 coro->args = newAV ();
1423 coro->flags = CF_NEW;
1424
1425 if (coro_first) coro_first->prev = coro;
1426 coro->next = coro_first;
1427 coro_first = coro;
1428
1429 coro->hv = hv = newHV ();
1430 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1431 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1432
1433 for (i = 1; i < items; i++)
1434 av_push (coro->args, newSVsv (ST (i)));
1435}
1436 OUTPUT:
1437 RETVAL
1438
1439# these not obviously related functions are all rolled into the same xs
1440# function to increase chances that they all will call transfer with the same
1441# stack offset
1442void
1443_set_stacklevel (...)
1444 ALIAS:
1445 Coro::State::transfer = 1
1446 Coro::schedule = 2
1447 Coro::cede = 3
1448 Coro::cede_notself = 4
1449 CODE:
1450{
1451 struct transfer_args ta;
1452
1453 switch (ix)
1454 {
1455 case 0:
1456 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1457 ta.next = 0;
1458 break;
1459
1460 case 1:
1461 if (items != 2)
1462 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1463
1464 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1465 break;
1466
1467 case 2:
1468 prepare_schedule (aTHX_ &ta);
1469 break;
1470
1471 case 3:
1472 prepare_cede (aTHX_ &ta);
1473 break;
1474
1475 case 4:
1476 if (!prepare_cede_notself (aTHX_ &ta))
1477 XSRETURN_EMPTY;
1478
1479 break;
1480 }
1481
1482 BARRIER;
1483 TRANSFER (ta);
1484
1485 if (GIMME_V != G_VOID && ta.next != ta.prev)
1486 XSRETURN_YES;
1487}
1488
1489bool
1490_destroy (SV *coro_sv)
1491 CODE:
1492 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1493 OUTPUT: 3257 OUTPUT:
1494 RETVAL 3258 RETVAL
1495 3259
1496void 3260void
3261transfer (...)
3262 PROTOTYPE: $$
3263 CODE:
3264 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3265
3266void
1497_exit (code) 3267_exit (int code)
1498 int code
1499 PROTOTYPE: $ 3268 PROTOTYPE: $
1500 CODE: 3269 CODE:
1501 _exit (code); 3270 _exit (code);
1502 3271
3272SV *
3273clone (Coro::State coro)
3274 CODE:
3275{
3276#if CORO_CLONE
3277 struct coro *ncoro = coro_clone (aTHX_ coro);
3278 MAGIC *mg;
3279 /* TODO: too much duplication */
3280 ncoro->hv = newHV ();
3281 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3282 mg->mg_flags |= MGf_DUP;
3283 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3284#else
3285 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3286#endif
3287}
3288 OUTPUT:
3289 RETVAL
3290
1503int 3291int
1504cctx_stacksize (int new_stacksize = 0) 3292cctx_stacksize (int new_stacksize = 0)
3293 PROTOTYPE: ;$
1505 CODE: 3294 CODE:
1506 RETVAL = coro_stacksize; 3295 RETVAL = cctx_stacksize;
1507 if (new_stacksize) 3296 if (new_stacksize)
3297 {
1508 coro_stacksize = new_stacksize; 3298 cctx_stacksize = new_stacksize;
3299 ++cctx_gen;
3300 }
1509 OUTPUT: 3301 OUTPUT:
1510 RETVAL 3302 RETVAL
1511 3303
1512int 3304int
3305cctx_max_idle (int max_idle = 0)
3306 PROTOTYPE: ;$
3307 CODE:
3308 RETVAL = cctx_max_idle;
3309 if (max_idle > 1)
3310 cctx_max_idle = max_idle;
3311 OUTPUT:
3312 RETVAL
3313
3314int
1513cctx_count () 3315cctx_count ()
3316 PROTOTYPE:
1514 CODE: 3317 CODE:
1515 RETVAL = cctx_count; 3318 RETVAL = cctx_count;
1516 OUTPUT: 3319 OUTPUT:
1517 RETVAL 3320 RETVAL
1518 3321
1519int 3322int
1520cctx_idle () 3323cctx_idle ()
3324 PROTOTYPE:
1521 CODE: 3325 CODE:
1522 RETVAL = cctx_idle; 3326 RETVAL = cctx_idle;
1523 OUTPUT: 3327 OUTPUT:
1524 RETVAL 3328 RETVAL
1525 3329
1526void 3330void
1527list () 3331list ()
3332 PROTOTYPE:
1528 PPCODE: 3333 PPCODE:
1529{ 3334{
1530 struct coro *coro; 3335 struct coro *coro;
1531 for (coro = coro_first; coro; coro = coro->next) 3336 for (coro = coro_first; coro; coro = coro->next)
1532 if (coro->hv) 3337 if (coro->hv)
… …
1537call (Coro::State coro, SV *coderef) 3342call (Coro::State coro, SV *coderef)
1538 ALIAS: 3343 ALIAS:
1539 eval = 1 3344 eval = 1
1540 CODE: 3345 CODE:
1541{ 3346{
1542 if (coro->mainstack) 3347 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1543 { 3348 {
1544 struct coro temp; 3349 struct coro *current = SvSTATE_current;
1545 Zero (&temp, 1, struct coro); 3350 struct CoroSLF slf_save;
1546 3351
1547 if (!(coro->flags & CF_RUNNING)) 3352 if (current != coro)
1548 { 3353 {
3354 PUTBACK;
1549 save_perl (aTHX_ &temp); 3355 save_perl (aTHX_ current);
1550 load_perl (aTHX_ coro); 3356 load_perl (aTHX_ coro);
3357 /* the coro is most likely in an active SLF call.
3358 * while not strictly required (the code we execute is
3359 * not allowed to call any SLF functions), it's cleaner
3360 * to reinitialise the slf_frame and restore it later.
3361 * This might one day allow us to actually do SLF calls
3362 * from code executed here.
3363 */
3364 slf_save = slf_frame;
3365 slf_frame.prepare = 0;
3366 SPAGAIN;
1551 } 3367 }
1552 3368
1553 { 3369 PUSHSTACK;
1554 dSP; 3370
1555 ENTER;
1556 SAVETMPS;
1557 PUSHMARK (SP); 3371 PUSHMARK (SP);
1558 PUTBACK; 3372 PUTBACK;
3373
1559 if (ix) 3374 if (ix)
1560 eval_sv (coderef, 0); 3375 eval_sv (coderef, 0);
1561 else 3376 else
1562 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3377 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3378
3379 POPSTACK;
1563 SPAGAIN; 3380 SPAGAIN;
1564 FREETMPS;
1565 LEAVE;
1566 PUTBACK;
1567 }
1568 3381
1569 if (!(coro->flags & CF_RUNNING)) 3382 if (current != coro)
1570 { 3383 {
3384 PUTBACK;
3385 slf_frame = slf_save;
1571 save_perl (aTHX_ coro); 3386 save_perl (aTHX_ coro);
1572 load_perl (aTHX_ &temp); 3387 load_perl (aTHX_ current);
3388 SPAGAIN;
1573 } 3389 }
1574 } 3390 }
1575} 3391}
1576 3392
1577SV * 3393SV *
… …
1580 ALIAS: 3396 ALIAS:
1581 is_ready = CF_READY 3397 is_ready = CF_READY
1582 is_running = CF_RUNNING 3398 is_running = CF_RUNNING
1583 is_new = CF_NEW 3399 is_new = CF_NEW
1584 is_destroyed = CF_DESTROYED 3400 is_destroyed = CF_DESTROYED
3401 is_suspended = CF_SUSPENDED
1585 CODE: 3402 CODE:
1586 RETVAL = boolSV (coro->flags & ix); 3403 RETVAL = boolSV (coro->flags & ix);
1587 OUTPUT: 3404 OUTPUT:
1588 RETVAL 3405 RETVAL
1589 3406
1590void 3407void
3408throw (Coro::State self, SV *exception = &PL_sv_undef)
3409 PROTOTYPE: $;$
3410 CODE:
3411{
3412 struct coro *current = SvSTATE_current;
3413 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
3414 SvREFCNT_dec (*exceptionp);
3415 SvGETMAGIC (exception);
3416 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3417}
3418
3419void
1591api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3420api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3421 PROTOTYPE: $;$
3422 C_ARGS: aTHX_ coro, flags
1592 3423
1593SV * 3424SV *
1594has_stack (Coro::State coro) 3425has_cctx (Coro::State coro)
1595 PROTOTYPE: $ 3426 PROTOTYPE: $
1596 CODE: 3427 CODE:
1597 RETVAL = boolSV (!!coro->cctx); 3428 /* maybe manage the running flag differently */
3429 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1598 OUTPUT: 3430 OUTPUT:
1599 RETVAL 3431 RETVAL
1600 3432
1601int 3433int
1602is_traced (Coro::State coro) 3434is_traced (Coro::State coro)
… …
1604 CODE: 3436 CODE:
1605 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3437 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1606 OUTPUT: 3438 OUTPUT:
1607 RETVAL 3439 RETVAL
1608 3440
1609IV 3441UV
1610rss (Coro::State coro) 3442rss (Coro::State coro)
1611 PROTOTYPE: $ 3443 PROTOTYPE: $
1612 ALIAS: 3444 ALIAS:
1613 usecount = 1 3445 usecount = 1
1614 CODE: 3446 CODE:
… …
1618 case 1: RETVAL = coro->usecount; break; 3450 case 1: RETVAL = coro->usecount; break;
1619 } 3451 }
1620 OUTPUT: 3452 OUTPUT:
1621 RETVAL 3453 RETVAL
1622 3454
3455void
3456force_cctx ()
3457 PROTOTYPE:
3458 CODE:
3459 cctx_current->idle_sp = 0;
3460
3461void
3462swap_defsv (Coro::State self)
3463 PROTOTYPE: $
3464 ALIAS:
3465 swap_defav = 1
3466 CODE:
3467 if (!self->slot)
3468 croak ("cannot swap state with coroutine that has no saved state,");
3469 else
3470 {
3471 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3472 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3473
3474 SV *tmp = *src; *src = *dst; *dst = tmp;
3475 }
3476
3477void
3478cancel (Coro::State self)
3479 CODE:
3480 coro_state_destroy (aTHX_ self);
3481
3482SV *
3483enable_times (int enabled = enable_times)
3484 CODE:
3485{
3486 RETVAL = boolSV (enable_times);
3487
3488 if (enabled != enable_times)
3489 {
3490 enable_times = enabled;
3491
3492 coro_times_update ();
3493 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3494 }
3495}
3496 OUTPUT:
3497 RETVAL
3498
3499void
3500times (Coro::State self)
3501 PPCODE:
3502{
3503 struct coro *current = SvSTATE (coro_current);
3504
3505 if (expect_false (current == self))
3506 {
3507 coro_times_update ();
3508 coro_times_add (SvSTATE (coro_current));
3509 }
3510
3511 EXTEND (SP, 2);
3512 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3513 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3514
3515 if (expect_false (current == self))
3516 coro_times_sub (SvSTATE (coro_current));
3517}
3518
3519void
3520swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3521 CODE:
3522{
3523 struct coro *current = SvSTATE_current;
3524
3525 if (current == coro)
3526 SWAP_SVS (current);
3527
3528 if (!coro->swap_sv)
3529 coro->swap_sv = newAV ();
3530
3531 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3532 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3533
3534 if (current == coro)
3535 SWAP_SVS (current);
3536}
3537
1623 3538
1624MODULE = Coro::State PACKAGE = Coro 3539MODULE = Coro::State PACKAGE = Coro
1625 3540
1626BOOT: 3541BOOT:
1627{ 3542{
1628 int i;
1629
1630 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE); 3543 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1631 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE); 3544 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3545 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3546 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3547 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1632 av_async_pool = get_av ("Coro::async_pool", TRUE); 3548 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3549 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3550 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3551 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1633 3552
1634 coro_current = get_sv ("Coro::current", FALSE); 3553 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1635 SvREADONLY_on (coro_current); 3554 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
1636 3555 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3556 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3557
1637 coro_stash = gv_stashpv ("Coro", TRUE); 3558 coro_stash = gv_stashpv ("Coro", TRUE);
1638 3559
1639 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3560 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1640 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3561 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1641 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3562 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1642 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3563 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1643 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3564 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1644 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3565 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1645
1646 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1647 coro_ready[i] = newAV ();
1648 3566
1649 { 3567 {
1650 SV *sv = perl_get_sv("Coro::API", 1); 3568 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1651 3569
1652 coroapi.schedule = api_schedule; 3570 coroapi.schedule = api_schedule;
3571 coroapi.schedule_to = api_schedule_to;
1653 coroapi.cede = api_cede; 3572 coroapi.cede = api_cede;
1654 coroapi.cede_notself = api_cede_notself; 3573 coroapi.cede_notself = api_cede_notself;
1655 coroapi.ready = api_ready; 3574 coroapi.ready = api_ready;
1656 coroapi.is_ready = api_is_ready; 3575 coroapi.is_ready = api_is_ready;
1657 coroapi.nready = &coro_nready; 3576 coroapi.nready = coro_nready;
1658 coroapi.current = coro_current; 3577 coroapi.current = coro_current;
1659 3578
1660 GCoroAPI = &coroapi; 3579 /*GCoroAPI = &coroapi;*/
1661 sv_setiv (sv, (IV)&coroapi); 3580 sv_setiv (sv, (IV)&coroapi);
1662 SvREADONLY_on (sv); 3581 SvREADONLY_on (sv);
1663 } 3582 }
1664} 3583}
3584
3585SV *
3586async (...)
3587 PROTOTYPE: &@
3588 CODE:
3589 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3590 api_ready (aTHX_ RETVAL);
3591 OUTPUT:
3592 RETVAL
3593
3594void
3595_destroy (Coro::State coro)
3596 CODE:
3597 /* used by the manager thread */
3598 coro_state_destroy (aTHX_ coro);
3599 coro_call_on_destroy (aTHX_ coro);
3600
3601void
3602terminate (...)
3603 CODE:
3604 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3605
3606void
3607cancel (...)
3608 CODE:
3609 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3610
3611void
3612schedule (...)
3613 CODE:
3614 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3615
3616void
3617schedule_to (...)
3618 CODE:
3619 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3620
3621void
3622cede_to (...)
3623 CODE:
3624 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3625
3626void
3627cede (...)
3628 CODE:
3629 CORO_EXECUTE_SLF_XS (slf_init_cede);
3630
3631void
3632cede_notself (...)
3633 CODE:
3634 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1665 3635
1666void 3636void
1667_set_current (SV *current) 3637_set_current (SV *current)
1668 PROTOTYPE: $ 3638 PROTOTYPE: $
1669 CODE: 3639 CODE:
1670 SvREFCNT_dec (SvRV (coro_current)); 3640 SvREFCNT_dec (SvRV (coro_current));
1671 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3641 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3642
3643void
3644_set_readyhook (SV *hook)
3645 PROTOTYPE: $
3646 CODE:
3647 SvREFCNT_dec (coro_readyhook);
3648 SvGETMAGIC (hook);
3649 if (SvOK (hook))
3650 {
3651 coro_readyhook = newSVsv (hook);
3652 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3653 }
3654 else
3655 {
3656 coro_readyhook = 0;
3657 CORO_READYHOOK = 0;
3658 }
1672 3659
1673int 3660int
1674prio (Coro::State coro, int newprio = 0) 3661prio (Coro::State coro, int newprio = 0)
3662 PROTOTYPE: $;$
1675 ALIAS: 3663 ALIAS:
1676 nice = 1 3664 nice = 1
1677 CODE: 3665 CODE:
1678{ 3666{
1679 RETVAL = coro->prio; 3667 RETVAL = coro->prio;
… …
1681 if (items > 1) 3669 if (items > 1)
1682 { 3670 {
1683 if (ix) 3671 if (ix)
1684 newprio = coro->prio - newprio; 3672 newprio = coro->prio - newprio;
1685 3673
1686 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3674 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1687 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3675 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1688 3676
1689 coro->prio = newprio; 3677 coro->prio = newprio;
1690 } 3678 }
1691} 3679}
1692 OUTPUT: 3680 OUTPUT:
… …
1694 3682
1695SV * 3683SV *
1696ready (SV *self) 3684ready (SV *self)
1697 PROTOTYPE: $ 3685 PROTOTYPE: $
1698 CODE: 3686 CODE:
1699 RETVAL = boolSV (api_ready (self)); 3687 RETVAL = boolSV (api_ready (aTHX_ self));
1700 OUTPUT: 3688 OUTPUT:
1701 RETVAL 3689 RETVAL
1702 3690
1703int 3691int
1704nready (...) 3692nready (...)
… …
1706 CODE: 3694 CODE:
1707 RETVAL = coro_nready; 3695 RETVAL = coro_nready;
1708 OUTPUT: 3696 OUTPUT:
1709 RETVAL 3697 RETVAL
1710 3698
1711# for async_pool speedup
1712void 3699void
1713_pool_1 (SV *cb) 3700suspend (Coro::State self)
3701 PROTOTYPE: $
1714 CODE: 3702 CODE:
1715{ 3703 self->flags |= CF_SUSPENDED;
1716 struct coro *coro = SvSTATE (coro_current);
1717 HV *hv = (HV *)SvRV (coro_current);
1718 AV *defav = GvAV (PL_defgv);
1719 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1720 AV *invoke_av;
1721 int i, len;
1722 3704
1723 if (!invoke) 3705void
1724 croak ("\3terminate\2\n"); 3706resume (Coro::State self)
3707 PROTOTYPE: $
3708 CODE:
3709 self->flags &= ~CF_SUSPENDED;
1725 3710
1726 SvREFCNT_dec (coro->saved_deffh); 3711void
1727 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv); 3712_pool_handler (...)
3713 CODE:
3714 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1728 3715
1729 hv_store (hv, "desc", sizeof ("desc") - 1, 3716void
1730 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 3717async_pool (SV *cv, ...)
3718 PROTOTYPE: &@
3719 PPCODE:
3720{
3721 HV *hv = (HV *)av_pop (av_async_pool);
3722 AV *av = newAV ();
3723 SV *cb = ST (0);
3724 int i;
1731 3725
1732 invoke_av = (AV *)SvRV (invoke); 3726 av_extend (av, items - 2);
1733 len = av_len (invoke_av); 3727 for (i = 1; i < items; ++i)
3728 av_push (av, SvREFCNT_inc_NN (ST (i)));
1734 3729
1735 sv_setsv (cb, AvARRAY (invoke_av)[0]); 3730 if ((SV *)hv == &PL_sv_undef)
1736
1737 if (len > 0)
1738 { 3731 {
1739 av_fill (defav, len - 1); 3732 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
1740 for (i = 0; i < len; ++i) 3733 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
1741 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 3734 SvREFCNT_dec (sv);
1742 } 3735 }
1743 3736
3737 {
3738 struct coro *coro = SvSTATE_hv (hv);
3739
3740 assert (!coro->invoke_cb);
3741 assert (!coro->invoke_av);
3742 coro->invoke_cb = SvREFCNT_inc (cb);
3743 coro->invoke_av = av;
3744 }
3745
3746 api_ready (aTHX_ (SV *)hv);
3747
3748 if (GIMME_V != G_VOID)
3749 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3750 else
1744 SvREFCNT_dec (invoke); 3751 SvREFCNT_dec (hv);
1745} 3752}
1746 3753
1747void 3754SV *
1748_pool_2 (SV *cb) 3755rouse_cb ()
3756 PROTOTYPE:
1749 CODE: 3757 CODE:
1750{ 3758 RETVAL = coro_new_rouse_cb (aTHX);
1751 struct coro *coro = SvSTATE (coro_current);
1752
1753 sv_setsv (cb, &PL_sv_undef);
1754
1755 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1756 coro->saved_deffh = 0;
1757
1758 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1759 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1760 croak ("\3terminate\2\n");
1761
1762 av_clear (GvAV (PL_defgv));
1763 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1764 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1765
1766 coro->prio = 0;
1767
1768 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1769 api_trace (coro_current, 0);
1770
1771 av_push (av_async_pool, newSVsv (coro_current));
1772}
1773
1774
1775MODULE = Coro::State PACKAGE = Coro::AIO
1776
1777SV *
1778_get_state ()
1779 CODE:
1780{
1781 struct io_state *data;
1782
1783 RETVAL = newSV (sizeof (struct io_state));
1784 data = (struct io_state *)SvPVX (RETVAL);
1785 SvCUR_set (RETVAL, sizeof (struct io_state));
1786 SvPOK_only (RETVAL);
1787
1788 data->errorno = errno;
1789 data->laststype = PL_laststype;
1790 data->laststatval = PL_laststatval;
1791 data->statcache = PL_statcache;
1792}
1793 OUTPUT: 3759 OUTPUT:
1794 RETVAL 3760 RETVAL
1795 3761
1796void 3762void
1797_set_state (char *data_) 3763rouse_wait (...)
3764 PROTOTYPE: ;$
3765 PPCODE:
3766 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3767
3768void
3769on_enter (SV *block)
3770 ALIAS:
3771 on_leave = 1
1798 PROTOTYPE: $ 3772 PROTOTYPE: &
1799 CODE: 3773 CODE:
1800{ 3774{
1801 struct io_state *data = (void *)data_; 3775 struct coro *coro = SvSTATE_current;
3776 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1802 3777
1803 errno = data->errorno; 3778 block = s_get_cv_croak (block);
1804 PL_laststype = data->laststype;
1805 PL_laststatval = data->laststatval;
1806 PL_statcache = data->statcache;
1807}
1808 3779
3780 if (!*avp)
3781 *avp = newAV ();
3782
3783 av_push (*avp, SvREFCNT_inc (block));
3784
3785 if (!ix)
3786 on_enterleave_call (aTHX_ block);
3787
3788 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3789 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3790 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3791}
3792
3793
3794MODULE = Coro::State PACKAGE = PerlIO::cede
3795
3796BOOT:
3797 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3798
3799
3800MODULE = Coro::State PACKAGE = Coro::Semaphore
3801
3802SV *
3803new (SV *klass, SV *count = 0)
3804 CODE:
3805{
3806 int semcnt = 1;
3807
3808 if (count)
3809 {
3810 SvGETMAGIC (count);
3811
3812 if (SvOK (count))
3813 semcnt = SvIV (count);
3814 }
3815
3816 RETVAL = sv_bless (
3817 coro_waitarray_new (aTHX_ semcnt),
3818 GvSTASH (CvGV (cv))
3819 );
3820}
3821 OUTPUT:
3822 RETVAL
3823
3824# helper for Coro::Channel and others
3825SV *
3826_alloc (int count)
3827 CODE:
3828 RETVAL = coro_waitarray_new (aTHX_ count);
3829 OUTPUT:
3830 RETVAL
3831
3832SV *
3833count (SV *self)
3834 CODE:
3835 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3836 OUTPUT:
3837 RETVAL
3838
3839void
3840up (SV *self, int adjust = 1)
3841 ALIAS:
3842 adjust = 1
3843 CODE:
3844 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3845
3846void
3847down (...)
3848 CODE:
3849 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3850
3851void
3852wait (...)
3853 CODE:
3854 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3855
3856void
3857try (SV *self)
3858 PPCODE:
3859{
3860 AV *av = (AV *)SvRV (self);
3861 SV *count_sv = AvARRAY (av)[0];
3862 IV count = SvIVX (count_sv);
3863
3864 if (count > 0)
3865 {
3866 --count;
3867 SvIVX (count_sv) = count;
3868 XSRETURN_YES;
3869 }
3870 else
3871 XSRETURN_NO;
3872}
3873
3874void
3875waiters (SV *self)
3876 PPCODE:
3877{
3878 AV *av = (AV *)SvRV (self);
3879 int wcount = AvFILLp (av) + 1 - 1;
3880
3881 if (GIMME_V == G_SCALAR)
3882 XPUSHs (sv_2mortal (newSViv (wcount)));
3883 else
3884 {
3885 int i;
3886 EXTEND (SP, wcount);
3887 for (i = 1; i <= wcount; ++i)
3888 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3889 }
3890}
3891
3892MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3893
3894void
3895_may_delete (SV *sem, int count, int extra_refs)
3896 PPCODE:
3897{
3898 AV *av = (AV *)SvRV (sem);
3899
3900 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3901 && AvFILLp (av) == 0 /* no waiters, just count */
3902 && SvIV (AvARRAY (av)[0]) == count)
3903 XSRETURN_YES;
3904
3905 XSRETURN_NO;
3906}
3907
3908MODULE = Coro::State PACKAGE = Coro::Signal
3909
3910SV *
3911new (SV *klass)
3912 CODE:
3913 RETVAL = sv_bless (
3914 coro_waitarray_new (aTHX_ 0),
3915 GvSTASH (CvGV (cv))
3916 );
3917 OUTPUT:
3918 RETVAL
3919
3920void
3921wait (...)
3922 CODE:
3923 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3924
3925void
3926broadcast (SV *self)
3927 CODE:
3928{
3929 AV *av = (AV *)SvRV (self);
3930 coro_signal_wake (aTHX_ av, AvFILLp (av));
3931}
3932
3933void
3934send (SV *self)
3935 CODE:
3936{
3937 AV *av = (AV *)SvRV (self);
3938
3939 if (AvFILLp (av))
3940 coro_signal_wake (aTHX_ av, 1);
3941 else
3942 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3943}
3944
3945IV
3946awaited (SV *self)
3947 CODE:
3948 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3949 OUTPUT:
3950 RETVAL
3951
3952
3953MODULE = Coro::State PACKAGE = Coro::AnyEvent
3954
3955BOOT:
3956 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3957
3958void
3959_schedule (...)
3960 CODE:
3961{
3962 static int incede;
3963
3964 api_cede_notself (aTHX);
3965
3966 ++incede;
3967 while (coro_nready >= incede && api_cede (aTHX))
3968 ;
3969
3970 sv_setsv (sv_activity, &PL_sv_undef);
3971 if (coro_nready >= incede)
3972 {
3973 PUSHMARK (SP);
3974 PUTBACK;
3975 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3976 }
3977
3978 --incede;
3979}
3980
3981
3982MODULE = Coro::State PACKAGE = Coro::AIO
3983
3984void
3985_register (char *target, char *proto, SV *req)
3986 CODE:
3987{
3988 SV *req_cv = s_get_cv_croak (req);
3989 /* newXSproto doesn't return the CV on 5.8 */
3990 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3991 sv_setpv ((SV *)slf_cv, proto);
3992 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3993}
3994
3995MODULE = Coro::State PACKAGE = Coro::Select
3996
3997void
3998patch_pp_sselect ()
3999 CODE:
4000 if (!coro_old_pp_sselect)
4001 {
4002 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4003 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4004 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4005 }
4006
4007void
4008unpatch_pp_sselect ()
4009 CODE:
4010 if (coro_old_pp_sselect)
4011 {
4012 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4013 coro_old_pp_sselect = 0;
4014 }
4015

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