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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.228 by root, Sun Apr 6 17:51:15 2008 UTC vs.
Revision 1.393 by root, Fri Apr 29 17:38:56 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
4#define PERL_EXT 9#define PERL_EXT
5 10
6#include "EXTERN.h" 11#include "EXTERN.h"
7#include "perl.h" 12#include "perl.h"
8#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
9 15
10#include "patchlevel.h" 16#include "schmorp.h"
11 17
12#include <stdio.h> 18#include <stdio.h>
13#include <errno.h> 19#include <errno.h>
14#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
15#include <inttypes.h> /* portable stdint.h */ 33# include <inttypes.h> /* most portable stdint.h */
34#endif
16 35
17#ifdef HAVE_MMAP 36#ifdef HAVE_MMAP
18# include <unistd.h> 37# include <unistd.h>
19# include <sys/mman.h> 38# include <sys/mman.h>
20# ifndef MAP_ANONYMOUS 39# ifndef MAP_ANONYMOUS
… …
37# define BOOT_PAGESIZE (void)0 56# define BOOT_PAGESIZE (void)0
38#endif 57#endif
39 58
40#if CORO_USE_VALGRIND 59#if CORO_USE_VALGRIND
41# include <valgrind/valgrind.h> 60# include <valgrind/valgrind.h>
42# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
43#else
44# define REGISTER_STACK(cctx,start,end)
45#endif 61#endif
46 62
47/* the maximum number of idle cctx that will be pooled */ 63/* the maximum number of idle cctx that will be pooled */
48#define MAX_IDLE_CCTX 8 64static int cctx_max_idle = 4;
49
50#define PERL_VERSION_ATLEAST(a,b,c) \
51 (PERL_REVISION > (a) \
52 || (PERL_REVISION == (a) \
53 && (PERL_VERSION > (b) \
54 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
55
56#if !PERL_VERSION_ATLEAST (5,6,0)
57# ifndef PL_ppaddr
58# define PL_ppaddr ppaddr
59# endif
60# ifndef call_sv
61# define call_sv perl_call_sv
62# endif
63# ifndef get_sv
64# define get_sv perl_get_sv
65# endif
66# ifndef get_cv
67# define get_cv perl_get_cv
68# endif
69# ifndef IS_PADGV
70# define IS_PADGV(v) 0
71# endif
72# ifndef IS_PADCONST
73# define IS_PADCONST(v) 0
74# endif
75#endif
76
77/* 5.8.8 */
78#ifndef GV_NOTQUAL
79# define GV_NOTQUAL 0
80#endif
81#ifndef newSV
82# define newSV(l) NEWSV(0,l)
83#endif
84
85/* 5.11 */
86#ifndef CxHASARGS
87# define CxHASARGS(cx) (cx)->blk_sub.hasargs
88#endif
89
90/* 5.8.7 */
91#ifndef SvRV_set
92# define SvRV_set(s,v) SvRV(s) = (v)
93#endif
94 65
95#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 66#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
96# undef CORO_STACKGUARD 67# undef CORO_STACKGUARD
97#endif 68#endif
98 69
… …
105# define CORO_PREFER_PERL_FUNCTIONS 0 76# define CORO_PREFER_PERL_FUNCTIONS 0
106#endif 77#endif
107 78
108/* 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
109 * 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
110#define dSTACKLEVEL volatile char stacklevel 85# define dSTACKLEVEL volatile void *stacklevel
111#define STACKLEVEL ((void *)&stacklevel) 86# define STACKLEVEL ((void *)&stacklevel)
87#endif
112 88
113#define IN_DESTRUCT (PL_main_cv == Nullcv) 89#define IN_DESTRUCT PL_dirty
114 90
115#if __GNUC__ >= 3 91#if __GNUC__ >= 3
116# define attribute(x) __attribute__(x) 92# define attribute(x) __attribute__(x)
117# define BARRIER __asm__ __volatile__ ("" : : : "memory")
118# define expect(expr,value) __builtin_expect ((expr),(value)) 93# define expect(expr,value) __builtin_expect ((expr), (value))
94# define INLINE static inline
119#else 95#else
120# define attribute(x) 96# define attribute(x)
121# define BARRIER
122# define expect(expr,value) (expr) 97# define expect(expr,value) (expr)
98# define INLINE static
123#endif 99#endif
124 100
125#define expect_false(expr) expect ((expr) != 0, 0) 101#define expect_false(expr) expect ((expr) != 0, 0)
126#define expect_true(expr) expect ((expr) != 0, 1) 102#define expect_true(expr) expect ((expr) != 0, 1)
127 103
128#define NOINLINE attribute ((noinline)) 104#define NOINLINE attribute ((noinline))
129 105
130#include "CoroAPI.h" 106#include "CoroAPI.h"
107#define GCoroAPI (&coroapi) /* very sneaky */
131 108
132#ifdef USE_ITHREADS 109#ifdef USE_ITHREADS
133static perl_mutex coro_mutex; 110# if CORO_PTHREAD
134# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 111static void *coro_thx;
135# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 112# endif
136#else
137# define LOCK (void)0
138# define UNLOCK (void)0
139#endif 113#endif
140 114
141/* helper storage struct for Coro::AIO */ 115#ifdef __linux
142struct io_state 116# include <time.h> /* for timespec */
143{ 117# include <syscall.h> /* for SYS_* */
144 int errorno; 118# ifdef SYS_clock_gettime
145 I32 laststype; 119# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
146 int laststatval; 120# define CORO_CLOCK_MONOTONIC 1
147 Stat_t statcache; 121# define CORO_CLOCK_THREAD_CPUTIME_ID 3
148}; 122# endif
123#endif
149 124
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;
150static size_t coro_stacksize = CORO_STACKSIZE; 133static size_t cctx_stacksize = CORO_STACKSIZE;
151static struct CoroAPI coroapi; 134static struct CoroAPI coroapi;
152static AV *main_mainstack; /* used to differentiate between $main and others */ 135static AV *main_mainstack; /* used to differentiate between $main and others */
153static JMPENV *main_top_env; 136static JMPENV *main_top_env;
154static HV *coro_state_stash, *coro_stash; 137static HV *coro_state_stash, *coro_stash;
155static volatile 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 */
156 143
157static GV *irsgv; /* $/ */ 144static GV *irsgv; /* $/ */
158static GV *stdoutgv; /* *STDOUT */ 145static GV *stdoutgv; /* *STDOUT */
159static SV *rv_diehook; 146static SV *rv_diehook;
160static SV *rv_warnhook; 147static SV *rv_warnhook;
161static HV *hv_sig; /* %SIG */ 148static HV *hv_sig; /* %SIG */
162 149
163/* async_pool helper stuff */ 150/* async_pool helper stuff */
164static SV *sv_pool_rss; 151static SV *sv_pool_rss;
165static SV *sv_pool_size; 152static SV *sv_pool_size;
153static SV *sv_async_pool_idle; /* description string */
166static 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;
167 166
168static struct coro_cctx *cctx_first; 167static struct coro_cctx *cctx_first;
169static int cctx_count, cctx_idle; 168static int cctx_count, cctx_idle;
170 169
171enum { 170enum {
… …
176 CC_TRACE_LINE = 0x10, /* trace each statement */ 175 CC_TRACE_LINE = 0x10, /* trace each statement */
177 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 176 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
178}; 177};
179 178
180/* this is a structure representing a c-level coroutine */ 179/* this is a structure representing a c-level coroutine */
181typedef struct coro_cctx { 180typedef struct coro_cctx
181{
182 struct coro_cctx *next; 182 struct coro_cctx *next;
183 183
184 /* the stack */ 184 /* the stack */
185 void *sptr; 185 void *sptr;
186 size_t ssize; 186 size_t ssize;
… …
189 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 189 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
190 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 */
191 JMPENV *top_env; 191 JMPENV *top_env;
192 coro_context cctx; 192 coro_context cctx;
193 193
194 U32 gen;
194#if CORO_USE_VALGRIND 195#if CORO_USE_VALGRIND
195 int valgrind_id; 196 int valgrind_id;
196#endif 197#endif
197 unsigned char flags; 198 unsigned char flags;
198} coro_cctx; 199} coro_cctx;
199 200
201static coro_cctx *cctx_current; /* the currently running cctx */
202
203/*****************************************************************************/
204
200enum { 205enum {
201 CF_RUNNING = 0x0001, /* coroutine is running */ 206 CF_RUNNING = 0x0001, /* coroutine is running */
202 CF_READY = 0x0002, /* coroutine is ready */ 207 CF_READY = 0x0002, /* coroutine is ready */
203 CF_NEW = 0x0004, /* has never been switched to */ 208 CF_NEW = 0x0004, /* has never been switched to */
204 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) */
205}; 212};
206 213
207/* the structure where most of the perl state is stored, overlaid on the cxstack */ 214/* the structure where most of the perl state is stored, overlaid on the cxstack */
208typedef struct { 215typedef struct
216{
209 SV *defsv; 217 SV *defsv;
210 AV *defav; 218 AV *defav;
211 SV *errsv; 219 SV *errsv;
212 SV *irsgv; 220 SV *irsgv;
221 HV *hinthv;
213#define VAR(name,type) type name; 222#define VAR(name,type) type name;
214# include "state.h" 223# include "state.h"
215#undef VAR 224#undef VAR
216} perl_slots; 225} perl_slots;
217 226
218#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 227#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
219 228
220/* this is a structure representing a perl-level coroutine */ 229/* this is a structure representing a perl-level coroutine */
221struct coro { 230struct coro {
222 /* the c coroutine allocated to this perl coroutine, if any */ 231 /* the C coroutine allocated to this perl coroutine, if any */
223 coro_cctx *cctx; 232 coro_cctx *cctx;
224 233
225 /* process data */ 234 /* ready queue */
235 struct coro *next_ready;
236
237 /* state data */
238 struct CoroSLF slf_frame; /* saved slf frame */
226 AV *mainstack; 239 AV *mainstack;
227 perl_slots *slot; /* basically the saved sp */ 240 perl_slots *slot; /* basically the saved sp */
228 241
242 CV *startcv; /* the CV to execute */
229 AV *args; /* data associated with this coroutine (initial args) */ 243 AV *args; /* data associated with this coroutine (initial args) */
230 int refcnt; /* coroutines are refcounted, yes */ 244 int refcnt; /* coroutines are refcounted, yes */
231 int flags; /* CF_ flags */ 245 int flags; /* CF_ flags */
232 HV *hv; /* the perl hash associated with this coro, if any */ 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 */
233 248
234 /* statistics */ 249 /* statistics */
235 int usecount; /* number of transfers to this coro */ 250 int usecount; /* number of transfers to this coro */
236 251
237 /* coro process data */ 252 /* coro process data */
238 int prio; 253 int prio;
239 SV *throw; /* exception to be thrown */ 254 SV *except; /* exception to be thrown */
255 SV *rouse_cb;
240 256
241 /* async_pool */ 257 /* async_pool */
242 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;
243 271
244 /* linked list */ 272 /* linked list */
245 struct coro *next, *prev; 273 struct coro *next, *prev;
246}; 274};
247 275
248typedef struct coro *Coro__State; 276typedef struct coro *Coro__State;
249typedef struct coro *Coro__State_or_hashref; 277typedef struct coro *Coro__State_or_hashref;
250 278
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
251/** Coro ********************************************************************/ 284/** Coro ********************************************************************/
252 285
253#define PRIO_MAX 3 286#define CORO_PRIO_MAX 3
254#define PRIO_HIGH 1 287#define CORO_PRIO_HIGH 1
255#define PRIO_NORMAL 0 288#define CORO_PRIO_NORMAL 0
256#define PRIO_LOW -1 289#define CORO_PRIO_LOW -1
257#define PRIO_IDLE -3 290#define CORO_PRIO_IDLE -3
258#define PRIO_MIN -4 291#define CORO_PRIO_MIN -4
259 292
260/* for Coro.pm */ 293/* for Coro.pm */
261static SV *coro_current; 294static SV *coro_current;
262static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 295static SV *coro_readyhook;
263static 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;
264static 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
265 372
266/** lowlevel stuff **********************************************************/ 373/** lowlevel stuff **********************************************************/
267 374
268static SV * 375static SV *
269coro_get_sv (pTHX_ const char *name, int create) 376coro_get_sv (pTHX_ const char *name, int create)
… …
293 get_hv (name, create); 400 get_hv (name, create);
294#endif 401#endif
295 return get_hv (name, create); 402 return get_hv (name, create);
296} 403}
297 404
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
298static AV * 504static AV *
299coro_clone_padlist (pTHX_ CV *cv) 505coro_derive_padlist (pTHX_ CV *cv)
300{ 506{
301 AV *padlist = CvPADLIST (cv); 507 AV *padlist = CvPADLIST (cv);
302 AV *newpadlist, *newpad; 508 AV *newpadlist, *newpad;
303 509
304 newpadlist = newAV (); 510 newpadlist = newAV ();
… …
309 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 515 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
310#endif 516#endif
311 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 517 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
312 --AvFILLp (padlist); 518 --AvFILLp (padlist);
313 519
314 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 520 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
315 av_store (newpadlist, 1, (SV *)newpad); 521 av_store (newpadlist, 1, (SV *)newpad);
316 522
317 return newpadlist; 523 return newpadlist;
318} 524}
319 525
320static void 526static void
321free_padlist (pTHX_ AV *padlist) 527free_padlist (pTHX_ AV *padlist)
322{ 528{
323 /* may be during global destruction */ 529 /* may be during global destruction */
324 if (SvREFCNT (padlist)) 530 if (!IN_DESTRUCT)
325 { 531 {
326 I32 i = AvFILLp (padlist); 532 I32 i = AvFILLp (padlist);
327 while (i >= 0) 533
534 while (i > 0) /* special-case index 0 */
328 { 535 {
329 SV **svp = av_fetch (padlist, i--, FALSE); 536 /* we try to be extra-careful here */
330 if (svp) 537 AV *av = (AV *)AvARRAY (padlist)[i--];
331 { 538 I32 j = AvFILLp (av);
332 SV *sv; 539
333 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 540 while (j >= 0)
541 SvREFCNT_dec (AvARRAY (av)[j--]);
542
543 AvFILLp (av) = -1;
334 SvREFCNT_dec (sv); 544 SvREFCNT_dec (av);
335
336 SvREFCNT_dec (*svp);
337 }
338 } 545 }
339 546
547 SvREFCNT_dec (AvARRAY (padlist)[0]);
548
549 AvFILLp (padlist) = -1;
340 SvREFCNT_dec ((SV*)padlist); 550 SvREFCNT_dec ((SV*)padlist);
341 } 551 }
342} 552}
343 553
344static int 554static int
345coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 555coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
346{ 556{
347 AV *padlist; 557 AV *padlist;
348 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;
349 563
350 /* casting is fun. */ 564 /* casting is fun. */
351 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 565 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
352 free_padlist (aTHX_ padlist); 566 free_padlist (aTHX_ padlist);
353 567
568 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
569
354 return 0; 570 return 0;
355} 571}
356
357#define CORO_MAGIC_type_cv PERL_MAGIC_ext
358#define CORO_MAGIC_type_state PERL_MAGIC_ext
359 572
360static MGVTBL coro_cv_vtbl = { 573static MGVTBL coro_cv_vtbl = {
361 0, 0, 0, 0, 574 0, 0, 0, 0,
362 coro_cv_free 575 coro_cv_free
363}; 576};
364
365#define CORO_MAGIC(sv,type) \
366 SvMAGIC (sv) \
367 ? SvMAGIC (sv)->mg_type == type \
368 ? SvMAGIC (sv) \
369 : mg_find (sv, type) \
370 : 0
371
372#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
373#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
374
375static struct coro *
376SvSTATE_ (pTHX_ SV *coro)
377{
378 HV *stash;
379 MAGIC *mg;
380
381 if (SvROK (coro))
382 coro = SvRV (coro);
383
384 if (expect_false (SvTYPE (coro) != SVt_PVHV))
385 croak ("Coro::State object required");
386
387 stash = SvSTASH (coro);
388 if (expect_false (stash != coro_stash && stash != coro_state_stash))
389 {
390 /* very slow, but rare, check */
391 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
392 croak ("Coro::State object required");
393 }
394
395 mg = CORO_MAGIC_state (coro);
396 return (struct coro *)mg->mg_ptr;
397}
398
399#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
400 577
401/* the next two functions merely cache the padlists */ 578/* the next two functions merely cache the padlists */
402static void 579static void
403get_padlist (pTHX_ CV *cv) 580get_padlist (pTHX_ CV *cv)
404{ 581{
… …
408 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)) 585 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
409 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 586 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
410 else 587 else
411 { 588 {
412#if CORO_PREFER_PERL_FUNCTIONS 589#if CORO_PREFER_PERL_FUNCTIONS
413 /* this is probably cleaner, but also slower? */ 590 /* this is probably cleaner? but also slower! */
591 /* in practise, it seems to be less stable */
414 CV *cp = Perl_cv_clone (cv); 592 CV *cp = Perl_cv_clone (aTHX_ cv);
415 CvPADLIST (cv) = CvPADLIST (cp); 593 CvPADLIST (cv) = CvPADLIST (cp);
416 CvPADLIST (cp) = 0; 594 CvPADLIST (cp) = 0;
417 SvREFCNT_dec (cp); 595 SvREFCNT_dec (cp);
418#else 596#else
419 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 597 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
420#endif 598#endif
421 } 599 }
422} 600}
423 601
424static void 602static void
… …
431 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0); 609 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
432 610
433 av = (AV *)mg->mg_obj; 611 av = (AV *)mg->mg_obj;
434 612
435 if (expect_false (AvFILLp (av) >= AvMAX (av))) 613 if (expect_false (AvFILLp (av) >= AvMAX (av)))
436 av_extend (av, AvMAX (av) + 1); 614 av_extend (av, AvFILLp (av) + 1);
437 615
438 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 616 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
439} 617}
440 618
441/** load & save, init *******************************************************/ 619/** load & save, init *******************************************************/
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);
442 674
443static void 675static void
444load_perl (pTHX_ Coro__State c) 676load_perl (pTHX_ Coro__State c)
445{ 677{
446 perl_slots *slot = c->slot; 678 perl_slots *slot = c->slot;
447 c->slot = 0; 679 c->slot = 0;
448 680
449 PL_mainstack = c->mainstack; 681 PL_mainstack = c->mainstack;
450 682
451 GvSV (PL_defgv) = slot->defsv; 683 GvSV (PL_defgv) = slot->defsv;
452 GvAV (PL_defgv) = slot->defav; 684 GvAV (PL_defgv) = slot->defav;
453 GvSV (PL_errgv) = slot->errsv; 685 GvSV (PL_errgv) = slot->errsv;
454 GvSV (irsgv) = slot->irsgv; 686 GvSV (irsgv) = slot->irsgv;
687 GvHV (PL_hintgv) = slot->hinthv;
455 688
456 #define VAR(name,type) PL_ ## name = slot->name; 689 #define VAR(name,type) PL_ ## name = slot->name;
457 # include "state.h" 690 # include "state.h"
458 #undef VAR 691 #undef VAR
459 692
… …
470 CvPADLIST (cv) = (AV *)POPs; 703 CvPADLIST (cv) = (AV *)POPs;
471 } 704 }
472 705
473 PUTBACK; 706 PUTBACK;
474 } 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);
475} 729}
476 730
477static void 731static void
478save_perl (pTHX_ Coro__State c) 732save_perl (pTHX_ Coro__State c)
479{ 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
480 { 755 {
481 dSP; 756 dSP;
482 I32 cxix = cxstack_ix; 757 I32 cxix = cxstack_ix;
483 PERL_CONTEXT *ccstk = cxstack; 758 PERL_CONTEXT *ccstk = cxstack;
484 PERL_SI *top_si = PL_curstackinfo; 759 PERL_SI *top_si = PL_curstackinfo;
… …
494 { 769 {
495 while (expect_true (cxix >= 0)) 770 while (expect_true (cxix >= 0))
496 { 771 {
497 PERL_CONTEXT *cx = &ccstk[cxix--]; 772 PERL_CONTEXT *cx = &ccstk[cxix--];
498 773
499 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)) 774 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
500 { 775 {
501 CV *cv = cx->blk_sub.cv; 776 CV *cv = cx->blk_sub.cv;
502 777
503 if (expect_true (CvDEPTH (cv))) 778 if (expect_true (CvDEPTH (cv)))
504 { 779 {
505 EXTEND (SP, 3); 780 EXTEND (SP, 3);
506 PUSHs ((SV *)CvPADLIST (cv)); 781 PUSHs ((SV *)CvPADLIST (cv));
507 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 782 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
508 PUSHs ((SV *)cv); 783 PUSHs ((SV *)cv);
509 784
510 CvDEPTH (cv) = 0; 785 CvDEPTH (cv) = 0;
511 get_padlist (aTHX_ cv); 786 get_padlist (aTHX_ cv);
512 } 787 }
… …
528 /* we manually unroll here, as usually 2 slots is enough */ 803 /* we manually unroll here, as usually 2 slots is enough */
529 if (SLOT_COUNT >= 1) CXINC; 804 if (SLOT_COUNT >= 1) CXINC;
530 if (SLOT_COUNT >= 2) CXINC; 805 if (SLOT_COUNT >= 2) CXINC;
531 if (SLOT_COUNT >= 3) CXINC; 806 if (SLOT_COUNT >= 3) CXINC;
532 { 807 {
533 int i; 808 unsigned int i;
534 for (i = 3; i < SLOT_COUNT; ++i) 809 for (i = 3; i < SLOT_COUNT; ++i)
535 CXINC; 810 CXINC;
536 } 811 }
537 cxstack_ix -= SLOT_COUNT; /* undo allocation */ 812 cxstack_ix -= SLOT_COUNT; /* undo allocation */
538 813
539 c->mainstack = PL_mainstack; 814 c->mainstack = PL_mainstack;
540 815
541 { 816 {
542 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); 817 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
543 818
544 slot->defav = GvAV (PL_defgv); 819 slot->defav = GvAV (PL_defgv);
545 slot->defsv = DEFSV; 820 slot->defsv = DEFSV;
546 slot->errsv = ERRSV; 821 slot->errsv = ERRSV;
547 slot->irsgv = GvSV (irsgv); 822 slot->irsgv = GvSV (irsgv);
823 slot->hinthv = GvHV (PL_hintgv);
548 824
549 #define VAR(name,type) slot->name = PL_ ## name; 825 #define VAR(name,type) slot->name = PL_ ## name;
550 # include "state.h" 826 # include "state.h"
551 #undef VAR 827 #undef VAR
552 } 828 }
553} 829}
554 830
555/* 831/*
556 * allocate various perl stacks. This is an exact copy 832 * allocate various perl stacks. This is almost an exact copy
557 * of perl.c:init_stacks, except that it uses less memory 833 * of perl.c:init_stacks, except that it uses less memory
558 * on the (sometimes correct) assumption that coroutines do 834 * on the (sometimes correct) assumption that coroutines do
559 * not usually need a lot of stackspace. 835 * not usually need a lot of stackspace.
560 */ 836 */
561#if CORO_PREFER_PERL_FUNCTIONS 837#if CORO_PREFER_PERL_FUNCTIONS
562# define coro_init_stacks init_stacks 838# define coro_init_stacks(thx) init_stacks ()
563#else 839#else
564static void 840static void
565coro_init_stacks (pTHX) 841coro_init_stacks (pTHX)
566{ 842{
567 PL_curstackinfo = new_stackinfo(32, 8); 843 PL_curstackinfo = new_stackinfo(32, 8);
… …
604 880
605/* 881/*
606 * destroy the stacks, the callchain etc... 882 * destroy the stacks, the callchain etc...
607 */ 883 */
608static void 884static void
609coro_destroy_stacks (pTHX) 885coro_destruct_stacks (pTHX)
610{ 886{
611 while (PL_curstackinfo->si_next) 887 while (PL_curstackinfo->si_next)
612 PL_curstackinfo = PL_curstackinfo->si_next; 888 PL_curstackinfo = PL_curstackinfo->si_next;
613 889
614 while (PL_curstackinfo) 890 while (PL_curstackinfo)
… …
630#if !PERL_VERSION_ATLEAST (5,10,0) 906#if !PERL_VERSION_ATLEAST (5,10,0)
631 Safefree (PL_retstack); 907 Safefree (PL_retstack);
632#endif 908#endif
633} 909}
634 910
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
635static size_t 920static size_t
636coro_rss (pTHX_ struct coro *coro) 921coro_rss (pTHX_ struct coro *coro)
637{ 922{
638 size_t rss = sizeof (*coro); 923 size_t rss = sizeof (*coro);
639 924
640 if (coro->mainstack) 925 if (coro->mainstack)
641 { 926 {
642 perl_slots tmp_slot;
643 perl_slots *slot;
644
645 if (coro->flags & CF_RUNNING) 927 if (coro->flags & CF_RUNNING)
646 { 928 {
647 slot = &tmp_slot; 929 #define SYM(sym) PL_ ## sym
648 930 CORO_RSS;
649 #define VAR(name,type) slot->name = PL_ ## name;
650 # include "state.h"
651 #undef VAR 931 #undef SYM
652 } 932 }
653 else 933 else
654 slot = coro->slot; 934 {
655 935 #define SYM(sym) coro->slot->sym
656 rss += sizeof (slot->curstackinfo); 936 CORO_RSS;
657 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 937 #undef SYM
658 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 938 }
659 rss += slot->tmps_max * sizeof (SV *);
660 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
661 rss += slot->scopestack_max * sizeof (I32);
662 rss += slot->savestack_max * sizeof (ANY);
663
664#if !PERL_VERSION_ATLEAST (5,10,0)
665 rss += slot->retstack_max * sizeof (OP *);
666#endif
667 } 939 }
668 940
669 return rss; 941 return rss;
670} 942}
671 943
672/** coroutine stack handling ************************************************/ 944/** coroutine stack handling ************************************************/
673 945
674static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg); 946static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
675static int (*orig_sigelem_set) (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)
955#endif
676 956
677/* 957/*
678 * This overrides the default magic get method of %SIG elements. 958 * This overrides the default magic get method of %SIG elements.
679 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook 959 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
680 * and instead of tryign to save and restore the hash elements, we just provide 960 * and instead of trying to save and restore the hash elements, we just provide
681 * readback here. 961 * readback here.
682 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
683 * not expecting this to actually change the hook. This is a potential problem
684 * when a schedule happens then, but we ignore this.
685 */ 962 */
686static int 963static int
687coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg) 964coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
688{ 965{
689 const char *s = MgPV_nolen_const (mg); 966 const char *s = MgPV_nolen_const (mg);
690 967
691 if (*s == '_') 968 if (*s == '_')
692 { 969 {
693 if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0; 970 SV **svp = 0;
694 if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0; 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 }
695 } 980 }
696 981
697 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0; 982 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
698} 983}
699 984
700static int 985static int
701coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg) 986coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
702{ 987{
703 const char *s = MgPV_nolen_const (mg); 988 const char *s = MgPV_nolen_const (mg);
704 989
705 if (*s == '_') 990 if (*s == '_')
706 { 991 {
… …
710 if (strEQ (s, "__WARN__")) svp = &PL_warnhook; 995 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
711 996
712 if (svp) 997 if (svp)
713 { 998 {
714 SV *old = *svp; 999 SV *old = *svp;
715 *svp = newSVsv (sv); 1000 *svp = 0;
716 SvREFCNT_dec (old); 1001 SvREFCNT_dec (old);
717 return; 1002 return 0;
718 } 1003 }
719 } 1004 }
720 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
721 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 1030 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
722} 1031}
723 1032
724static void 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{
1043 return 0;
1044}
1045
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 */
725coro_setup (pTHX_ struct coro *coro) 1055init_perl (pTHX_ struct coro *coro)
726{ 1056{
727 /* 1057 /*
728 * emulate part of the perl startup here. 1058 * emulate part of the perl startup here.
729 */ 1059 */
730 coro_init_stacks (aTHX); 1060 coro_init_stacks (aTHX);
731 1061
732 PL_runops = RUNOPS_DEFAULT; 1062 PL_runops = RUNOPS_DEFAULT;
733 PL_curcop = &PL_compiling; 1063 PL_curcop = &PL_compiling;
734 PL_in_eval = EVAL_NULL; 1064 PL_in_eval = EVAL_NULL;
735 PL_comppad = 0; 1065 PL_comppad = 0;
1066 PL_comppad_name = 0;
1067 PL_comppad_name_fill = 0;
1068 PL_comppad_name_floor = 0;
736 PL_curpm = 0; 1069 PL_curpm = 0;
737 PL_curpad = 0; 1070 PL_curpad = 0;
738 PL_localizing = 0; 1071 PL_localizing = 0;
739 PL_dirty = 0;
740 PL_restartop = 0; 1072 PL_restartop = 0;
741#if !PERL_VERSION_ATLEAST (5,10,0) 1073#if PERL_VERSION_ATLEAST (5,10,0)
742 PL_parser = 0; 1074 PL_parser = 0;
743#endif 1075#endif
1076 PL_hints = 0;
744 1077
745 /* recreate the die/warn hooks */ 1078 /* recreate the die/warn hooks */
746 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook ); 1079 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
747 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook); 1080 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
748 1081
749 GvSV (PL_defgv) = newSV (0); 1082 GvSV (PL_defgv) = newSV (0);
750 GvAV (PL_defgv) = coro->args; coro->args = 0; 1083 GvAV (PL_defgv) = coro->args; coro->args = 0;
751 GvSV (PL_errgv) = newSV (0); 1084 GvSV (PL_errgv) = newSV (0);
752 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;
753 PL_rs = newSVsv (GvSV (irsgv)); 1087 PL_rs = newSVsv (GvSV (irsgv));
754 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv); 1088 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
755 1089
756 { 1090 {
757 dSP; 1091 dSP;
758 LOGOP myop; 1092 UNOP myop;
759 1093
760 Zero (&myop, 1, LOGOP); 1094 Zero (&myop, 1, UNOP);
761 myop.op_next = Nullop; 1095 myop.op_next = Nullop;
1096 myop.op_type = OP_ENTERSUB;
762 myop.op_flags = OPf_WANT_VOID; 1097 myop.op_flags = OPf_WANT_VOID;
763 1098
764 PUSHMARK (SP); 1099 PUSHMARK (SP);
765 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 1100 PUSHs ((SV *)coro->startcv);
766 PUTBACK; 1101 PUTBACK;
767 PL_op = (OP *)&myop; 1102 PL_op = (OP *)&myop;
768 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1103 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
769 SPAGAIN;
770 } 1104 }
771 1105
772 /* this newly created coroutine might be run on an existing cctx which most 1106 /* this newly created coroutine might be run on an existing cctx which most
773 * likely was suspended in set_stacklevel, called from entersub. 1107 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
774 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
775 * so we ENTER here for symmetry
776 */ 1108 */
777 ENTER; 1109 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
778} 1110 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
779 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
780static void 1132static void
781coro_destroy (pTHX_ struct coro *coro) 1133coro_unwind_stacks (pTHX)
782{ 1134{
783 if (!IN_DESTRUCT) 1135 if (!IN_DESTRUCT)
784 { 1136 {
785 /* restore all saved variables and stuff */ 1137 /* restore all saved variables and stuff */
786 LEAVE_SCOPE (0); 1138 LEAVE_SCOPE (0);
… …
794 POPSTACK_TO (PL_mainstack); 1146 POPSTACK_TO (PL_mainstack);
795 1147
796 /* unwind main stack */ 1148 /* unwind main stack */
797 dounwind (-1); 1149 dounwind (-1);
798 } 1150 }
1151}
799 1152
800 SvREFCNT_dec (GvSV (PL_defgv)); 1153static void
801 SvREFCNT_dec (GvAV (PL_defgv)); 1154destroy_perl (pTHX_ struct coro *coro)
802 SvREFCNT_dec (GvSV (PL_errgv)); 1155{
803 SvREFCNT_dec (PL_defoutgv); 1156 SV *svf [9];
804 SvREFCNT_dec (PL_rs);
805 SvREFCNT_dec (GvSV (irsgv));
806 1157
807 SvREFCNT_dec (PL_diehook);
808 SvREFCNT_dec (PL_warnhook);
809 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
810 SvREFCNT_dec (coro->saved_deffh); 1193 SvREFCNT_dec (coro->saved_deffh);
811 SvREFCNT_dec (coro->throw); 1194 SvREFCNT_dec (coro->rouse_cb);
812 1195 SvREFCNT_dec (coro->invoke_cb);
813 coro_destroy_stacks (aTHX); 1196 SvREFCNT_dec (coro->invoke_av);
1197 }
814} 1198}
815 1199
816static void 1200INLINE void
817free_coro_mortal (pTHX) 1201free_coro_mortal (pTHX)
818{ 1202{
819 if (expect_true (coro_mortal)) 1203 if (expect_true (coro_mortal))
820 { 1204 {
821 SvREFCNT_dec (coro_mortal); 1205 SvREFCNT_dec (coro_mortal);
… …
826static int 1210static int
827runops_trace (pTHX) 1211runops_trace (pTHX)
828{ 1212{
829 COP *oldcop = 0; 1213 COP *oldcop = 0;
830 int oldcxix = -2; 1214 int oldcxix = -2;
831 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
832 coro_cctx *cctx = coro->cctx;
833 1215
834 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1216 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
835 { 1217 {
836 PERL_ASYNC_CHECK (); 1218 PERL_ASYNC_CHECK ();
837 1219
838 if (cctx->flags & CC_TRACE_ALL) 1220 if (cctx_current->flags & CC_TRACE_ALL)
839 { 1221 {
840 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)
841 { 1223 {
842 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1224 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
843 SV **bot, **top; 1225 SV **bot, **top;
844 AV *av = newAV (); /* return values */ 1226 AV *av = newAV (); /* return values */
845 SV **cb; 1227 SV **cb;
… …
855 : cx->blk_gimme == G_SCALAR ? bot + 1 1237 : cx->blk_gimme == G_SCALAR ? bot + 1
856 : bot; 1238 : bot;
857 1239
858 av_extend (av, top - bot); 1240 av_extend (av, top - bot);
859 while (bot < top) 1241 while (bot < top)
860 av_push (av, SvREFCNT_inc (*bot++)); 1242 av_push (av, SvREFCNT_inc_NN (*bot++));
861 1243
862 PL_runops = RUNOPS_DEFAULT; 1244 PL_runops = RUNOPS_DEFAULT;
863 ENTER; 1245 ENTER;
864 SAVETMPS; 1246 SAVETMPS;
865 EXTEND (SP, 3); 1247 EXTEND (SP, 3);
… …
882 1264
883 if (PL_curcop != &PL_compiling) 1265 if (PL_curcop != &PL_compiling)
884 { 1266 {
885 SV **cb; 1267 SV **cb;
886 1268
887 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1269 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
888 { 1270 {
889 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1271 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
890 1272
891 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1273 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
892 { 1274 {
893 runops_proc_t old_runops = PL_runops;
894 dSP; 1275 dSP;
895 GV *gv = CvGV (cx->blk_sub.cv); 1276 GV *gv = CvGV (cx->blk_sub.cv);
896 SV *fullname = sv_2mortal (newSV (0)); 1277 SV *fullname = sv_2mortal (newSV (0));
897 1278
898 if (isGV (gv)) 1279 if (isGV (gv))
… …
903 SAVETMPS; 1284 SAVETMPS;
904 EXTEND (SP, 3); 1285 EXTEND (SP, 3);
905 PUSHMARK (SP); 1286 PUSHMARK (SP);
906 PUSHs (&PL_sv_yes); 1287 PUSHs (&PL_sv_yes);
907 PUSHs (fullname); 1288 PUSHs (fullname);
908 PUSHs (CxHASARGS (cx) ? 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);
909 PUTBACK; 1290 PUTBACK;
910 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);
911 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);
912 SPAGAIN; 1293 SPAGAIN;
913 FREETMPS; 1294 FREETMPS;
… …
916 } 1297 }
917 1298
918 oldcxix = cxstack_ix; 1299 oldcxix = cxstack_ix;
919 } 1300 }
920 1301
921 if (cctx->flags & CC_TRACE_LINE) 1302 if (cctx_current->flags & CC_TRACE_LINE)
922 { 1303 {
923 dSP; 1304 dSP;
924 1305
925 PL_runops = RUNOPS_DEFAULT; 1306 PL_runops = RUNOPS_DEFAULT;
926 ENTER; 1307 ENTER;
… …
945 1326
946 TAINT_NOT; 1327 TAINT_NOT;
947 return 0; 1328 return 0;
948} 1329}
949 1330
950/* inject a fake call to Coro::State::_cctx_init into the execution */ 1331static struct CoroSLF cctx_ssl_frame;
951/* _cctx_init should be careful, as it could be called at almost any time */ 1332
952/* 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 */
953static void NOINLINE 1348static void NOINLINE
954cctx_prepare (pTHX_ coro_cctx *cctx) 1349cctx_prepare (pTHX)
955{ 1350{
956 dSP;
957 LOGOP myop;
958
959 PL_top_env = &PL_start_env; 1351 PL_top_env = &PL_start_env;
960 1352
961 if (cctx->flags & CC_TRACE) 1353 if (cctx_current->flags & CC_TRACE)
962 PL_runops = runops_trace; 1354 PL_runops = runops_trace;
963 1355
964 Zero (&myop, 1, LOGOP); 1356 /* we already must be executing an SLF op, there is no other valid way
965 myop.op_next = PL_op; 1357 * that can lead to creation of a new cctx */
966 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));
967 1360
968 PUSHMARK (SP); 1361 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
969 EXTEND (SP, 2); 1362 cctx_ssl_frame = slf_frame;
970 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1363
971 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1364 slf_frame.prepare = slf_prepare_set_stacklevel;
972 PUTBACK; 1365 slf_frame.check = slf_check_set_stacklevel;
973 PL_op = (OP *)&myop; 1366}
974 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1367
975 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);
976} 1373}
977 1374
978/* 1375/*
979 * this is a _very_ stripped down perl interpreter ;) 1376 * this is a _very_ stripped down perl interpreter ;)
980 */ 1377 */
981static void 1378static void
982cctx_run (void *arg) 1379cctx_run (void *arg)
983{ 1380{
1381#ifdef USE_ITHREADS
1382# if CORO_PTHREAD
1383 PERL_SET_CONTEXT (coro_thx);
1384# endif
1385#endif
1386 {
984 dTHX; 1387 dTHX;
985 1388
986 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1389 /* normally we would need to skip the entersub here */
987 UNLOCK; 1390 /* not doing so will re-execute it, which is exactly what we want */
988
989 /* we now skip the entersub that lead to transfer() */
990 PL_op = PL_op->op_next; 1391 /* PL_nop = PL_nop->op_next */
991 1392
992 /* inject a fake subroutine call to cctx_init */ 1393 /* inject a fake subroutine call to cctx_init */
993 cctx_prepare (aTHX_ (coro_cctx *)arg); 1394 cctx_prepare (aTHX);
994 1395
1396 /* cctx_run is the alternative tail of transfer() */
1397 transfer_tail (aTHX);
1398
995 /* 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 */
996 PL_restartop = PL_op; 1400 PL_restartop = PL_op;
997 perl_run (PL_curinterp); 1401 perl_run (PL_curinterp);
998
999 /* 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 /*
1000 * 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
1001 * 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)
1002 * 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
1003 * bootstrap-time "top" top_env, as we cannot restore the "main" 1412 * bootstrap-time "top" top_env, as we cannot restore the "main"
1004 * 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.
1005 */ 1416 */
1006 PL_top_env = main_top_env; 1417 PL_top_env = main_top_env;
1007 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 }
1008} 1420}
1009 1421
1010static coro_cctx * 1422static coro_cctx *
1011cctx_new () 1423cctx_new ()
1012{ 1424{
1013 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 ();
1014 void *stack_start; 1454 void *stack_start;
1015 size_t stack_size; 1455 size_t stack_size;
1016 1456
1017 ++cctx_count;
1018
1019 Newz (0, cctx, 1, coro_cctx);
1020
1021#if HAVE_MMAP 1457#if HAVE_MMAP
1022 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;
1023 /* mmap supposedly does allocate-on-write for us */ 1459 /* mmap supposedly does allocate-on-write for us */
1024 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);
1025 1461
1026 if (cctx->sptr != (void *)-1) 1462 if (cctx->sptr != (void *)-1)
1027 { 1463 {
1028# if CORO_STACKGUARD 1464 #if CORO_STACKGUARD
1029 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1465 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1030# endif 1466 #endif
1031 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1467 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1032 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1468 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1033 cctx->flags |= CC_MAPPED; 1469 cctx->flags |= CC_MAPPED;
1034 } 1470 }
1035 else 1471 else
1036#endif 1472#endif
1037 { 1473 {
1038 cctx->ssize = coro_stacksize * (long)sizeof (long); 1474 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1039 New (0, cctx->sptr, coro_stacksize, long); 1475 New (0, cctx->sptr, cctx_stacksize, long);
1040 1476
1041 if (!cctx->sptr) 1477 if (!cctx->sptr)
1042 { 1478 {
1043 perror ("FATAL: unable to allocate stack for coroutine"); 1479 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1044 _exit (EXIT_FAILURE); 1480 _exit (EXIT_FAILURE);
1045 } 1481 }
1046 1482
1047 stack_start = cctx->sptr; 1483 stack_start = cctx->sptr;
1048 stack_size = cctx->ssize; 1484 stack_size = cctx->ssize;
1049 } 1485 }
1050 1486
1051 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
1052 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1491 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1053 1492
1054 return cctx; 1493 return cctx;
1055} 1494}
1056 1495
… …
1058cctx_destroy (coro_cctx *cctx) 1497cctx_destroy (coro_cctx *cctx)
1059{ 1498{
1060 if (!cctx) 1499 if (!cctx)
1061 return; 1500 return;
1062 1501
1502 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1503
1063 --cctx_count; 1504 --cctx_count;
1505 coro_destroy (&cctx->cctx);
1064 1506
1507 /* coro_transfer creates new, empty cctx's */
1508 if (cctx->sptr)
1509 {
1065#if CORO_USE_VALGRIND 1510 #if CORO_USE_VALGRIND
1066 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
1067#endif 1518#endif
1068
1069#if HAVE_MMAP
1070 if (cctx->flags & CC_MAPPED)
1071 munmap (cctx->sptr, cctx->ssize);
1072 else
1073#endif
1074 Safefree (cctx->sptr); 1519 Safefree (cctx->sptr);
1520 }
1075 1521
1076 Safefree (cctx); 1522 Safefree (cctx);
1077} 1523}
1078 1524
1079/* wether this cctx should be destructed */ 1525/* wether this cctx should be destructed */
1080#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1526#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1081 1527
1082static coro_cctx * 1528static coro_cctx *
1083cctx_get (pTHX) 1529cctx_get (pTHX)
1084{ 1530{
1085 while (expect_true (cctx_first)) 1531 while (expect_true (cctx_first))
… …
1092 return cctx; 1538 return cctx;
1093 1539
1094 cctx_destroy (cctx); 1540 cctx_destroy (cctx);
1095 } 1541 }
1096 1542
1097 return cctx_new (); 1543 return cctx_new_run ();
1098} 1544}
1099 1545
1100static void 1546static void
1101cctx_put (coro_cctx *cctx) 1547cctx_put (coro_cctx *cctx)
1102{ 1548{
1549 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1550
1103 /* free another cctx if overlimit */ 1551 /* free another cctx if overlimit */
1104 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1552 if (expect_false (cctx_idle >= cctx_max_idle))
1105 { 1553 {
1106 coro_cctx *first = cctx_first; 1554 coro_cctx *first = cctx_first;
1107 cctx_first = first->next; 1555 cctx_first = first->next;
1108 --cctx_idle; 1556 --cctx_idle;
1109 1557
… …
1118/** coroutine switching *****************************************************/ 1566/** coroutine switching *****************************************************/
1119 1567
1120static void 1568static void
1121transfer_check (pTHX_ struct coro *prev, struct coro *next) 1569transfer_check (pTHX_ struct coro *prev, struct coro *next)
1122{ 1570{
1571 /* TODO: throwing up here is considered harmful */
1572
1123 if (expect_true (prev != next)) 1573 if (expect_true (prev != next))
1124 { 1574 {
1125 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1575 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1126 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,");
1127 1577
1128 if (expect_false (next->flags & CF_RUNNING))
1129 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1130
1131 if (expect_false (next->flags & CF_DESTROYED)) 1578 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1132 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,");
1133 1580
1134#if !PERL_VERSION_ATLEAST (5,10,0) 1581#if !PERL_VERSION_ATLEAST (5,10,0)
1135 if (expect_false (PL_lex_state != LEX_NOTPARSING) 1582 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1136 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,");
1137#endif 1584#endif
1138 } 1585 }
1139} 1586}
1140 1587
1141/* always use the TRANSFER macro */ 1588/* always use the TRANSFER macro */
1142static void NOINLINE 1589static void NOINLINE /* noinline so we have a fixed stackframe */
1143transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1590transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1144{ 1591{
1145 dSTACKLEVEL; 1592 dSTACKLEVEL;
1146 static volatile int has_throw;
1147 1593
1148 /* sometimes transfer is only called to set idle_sp */ 1594 /* sometimes transfer is only called to set idle_sp */
1149 if (expect_false (!next)) 1595 if (expect_false (!prev))
1150 { 1596 {
1151 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1597 cctx_current->idle_sp = STACKLEVEL;
1152 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 */
1153 } 1599 }
1154 else if (expect_true (prev != next)) 1600 else if (expect_true (prev != next))
1155 { 1601 {
1156 coro_cctx *prev__cctx; 1602 coro_cctx *cctx_prev;
1157 1603
1158 if (expect_false (prev->flags & CF_NEW)) 1604 if (expect_false (prev->flags & CF_NEW))
1159 { 1605 {
1160 /* create a new empty context */ 1606 /* create a new empty/source context */
1161 Newz (0, prev->cctx, 1, coro_cctx);
1162 prev->flags &= ~CF_NEW; 1607 prev->flags &= ~CF_NEW;
1163 prev->flags |= CF_RUNNING; 1608 prev->flags |= CF_RUNNING;
1164 } 1609 }
1165 1610
1166 prev->flags &= ~CF_RUNNING; 1611 prev->flags &= ~CF_RUNNING;
1167 next->flags |= CF_RUNNING; 1612 next->flags |= CF_RUNNING;
1168
1169 LOCK;
1170 1613
1171 /* first get rid of the old state */ 1614 /* first get rid of the old state */
1172 save_perl (aTHX_ prev); 1615 save_perl (aTHX_ prev);
1173 1616
1174 if (expect_false (next->flags & CF_NEW)) 1617 if (expect_false (next->flags & CF_NEW))
1175 { 1618 {
1176 /* need to start coroutine */ 1619 /* need to start coroutine */
1177 next->flags &= ~CF_NEW; 1620 next->flags &= ~CF_NEW;
1178 /* setup coroutine call */ 1621 /* setup coroutine call */
1179 coro_setup (aTHX_ next); 1622 init_perl (aTHX_ next);
1180 } 1623 }
1181 else 1624 else
1182 load_perl (aTHX_ next); 1625 load_perl (aTHX_ next);
1183 1626
1184 prev__cctx = prev->cctx;
1185
1186 /* possibly "free" the cctx */ 1627 /* possibly untie and reuse the cctx */
1187 if (expect_true ( 1628 if (expect_true (
1188 prev__cctx->idle_sp == STACKLEVEL 1629 cctx_current->idle_sp == STACKLEVEL
1189 && !(prev__cctx->flags & CC_TRACE) 1630 && !(cctx_current->flags & CC_TRACE)
1190 && !force_cctx 1631 && !force_cctx
1191 )) 1632 ))
1192 { 1633 {
1193 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1634 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1194 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1635 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1195 1636
1196 prev->cctx = 0;
1197
1198 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1637 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1199 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1638 /* without this the next cctx_get might destroy the running cctx while still in use */
1200 if (expect_false (CCTX_EXPIRED (prev__cctx))) 1639 if (expect_false (CCTX_EXPIRED (cctx_current)))
1201 if (!next->cctx) 1640 if (expect_true (!next->cctx))
1202 next->cctx = cctx_get (aTHX); 1641 next->cctx = cctx_get (aTHX);
1203 1642
1204 cctx_put (prev__cctx); 1643 cctx_put (cctx_current);
1205 } 1644 }
1645 else
1646 prev->cctx = cctx_current;
1206 1647
1207 ++next->usecount; 1648 ++next->usecount;
1208 1649
1209 if (expect_true (!next->cctx)) 1650 cctx_prev = cctx_current;
1210 next->cctx = cctx_get (aTHX); 1651 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1211 1652
1212 has_throw = !!next->throw; 1653 next->cctx = 0;
1213 1654
1214 if (expect_false (prev__cctx != next->cctx)) 1655 if (expect_false (cctx_prev != cctx_current))
1215 { 1656 {
1216 prev__cctx->top_env = PL_top_env; 1657 cctx_prev->top_env = PL_top_env;
1217 PL_top_env = next->cctx->top_env; 1658 PL_top_env = cctx_current->top_env;
1218 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1659 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1219 } 1660 }
1220 1661
1221 free_coro_mortal (aTHX); 1662 transfer_tail (aTHX);
1222 UNLOCK;
1223
1224 if (expect_false (has_throw))
1225 {
1226 struct coro *coro = SvSTATE (coro_current);
1227
1228 if (coro->throw)
1229 {
1230 SV *exception = coro->throw;
1231 coro->throw = 0;
1232 sv_setsv (ERRSV, exception);
1233 croak (0);
1234 }
1235 }
1236 } 1663 }
1237} 1664}
1238
1239struct transfer_args
1240{
1241 struct coro *prev, *next;
1242};
1243 1665
1244#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx)) 1666#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1245#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1667#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1246 1668
1247/** high level stuff ********************************************************/ 1669/** high level stuff ********************************************************/
… …
1249static int 1671static int
1250coro_state_destroy (pTHX_ struct coro *coro) 1672coro_state_destroy (pTHX_ struct coro *coro)
1251{ 1673{
1252 if (coro->flags & CF_DESTROYED) 1674 if (coro->flags & CF_DESTROYED)
1253 return 0; 1675 return 0;
1676
1677 if (coro->on_destroy && !PL_dirty)
1678 coro->on_destroy (aTHX_ coro);
1679
1680 /*
1681 * The on_destroy above most likely is from an SLF call.
1682 * Since by definition the SLF call will not finish when we destroy
1683 * the coro, we will have to force-finish it here, otherwise
1684 * cleanup functions cannot call SLF functions.
1685 */
1686 coro->slf_frame.prepare = 0;
1254 1687
1255 coro->flags |= CF_DESTROYED; 1688 coro->flags |= CF_DESTROYED;
1256 1689
1257 if (coro->flags & CF_READY) 1690 if (coro->flags & CF_READY)
1258 { 1691 {
1259 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1692 /* reduce nready, as destroying a ready coro effectively unreadies it */
1260 /* alternative: look through all ready queues and remove the coro */ 1693 /* alternative: look through all ready queues and remove the coro */
1261 LOCK;
1262 --coro_nready; 1694 --coro_nready;
1263 UNLOCK;
1264 } 1695 }
1265 else 1696 else
1266 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1697 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1267 1698
1268 if (coro->mainstack && coro->mainstack != main_mainstack) 1699 if (coro->mainstack
1269 { 1700 && coro->mainstack != main_mainstack
1270 struct coro temp; 1701 && coro->slot
1271 1702 && !PL_dirty)
1272 if (coro->flags & CF_RUNNING)
1273 croak ("FATAL: tried to destroy currently running coroutine");
1274
1275 save_perl (aTHX_ &temp);
1276 load_perl (aTHX_ coro); 1703 destroy_perl (aTHX_ coro);
1277
1278 coro_destroy (aTHX_ coro);
1279
1280 load_perl (aTHX_ &temp);
1281
1282 coro->slot = 0;
1283 }
1284
1285 cctx_destroy (coro->cctx);
1286 SvREFCNT_dec (coro->args);
1287 1704
1288 if (coro->next) coro->next->prev = coro->prev; 1705 if (coro->next) coro->next->prev = coro->prev;
1289 if (coro->prev) coro->prev->next = coro->next; 1706 if (coro->prev) coro->prev->next = coro->next;
1290 if (coro == coro_first) coro_first = coro->next; 1707 if (coro == coro_first) coro_first = coro->next;
1708
1709 cctx_destroy (coro->cctx);
1710 SvREFCNT_dec (coro->startcv);
1711 SvREFCNT_dec (coro->args);
1712 SvREFCNT_dec (coro->swap_sv);
1713 SvREFCNT_dec (CORO_THROW);
1291 1714
1292 return 1; 1715 return 1;
1293} 1716}
1294 1717
1295static int 1718static int
… …
1329# define MGf_DUP 0 1752# define MGf_DUP 0
1330#endif 1753#endif
1331}; 1754};
1332 1755
1333static void 1756static void
1334prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1757prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1335{ 1758{
1336 ta->prev = SvSTATE (prev_sv); 1759 ta->prev = SvSTATE (prev_sv);
1337 ta->next = SvSTATE (next_sv); 1760 ta->next = SvSTATE (next_sv);
1338 TRANSFER_CHECK (*ta); 1761 TRANSFER_CHECK (*ta);
1339} 1762}
1340 1763
1341static void 1764static void
1342api_transfer (SV *prev_sv, SV *next_sv) 1765api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1343{ 1766{
1344 dTHX;
1345 struct transfer_args ta; 1767 struct coro_transfer_args ta;
1346 1768
1347 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1769 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1348 TRANSFER (ta, 1); 1770 TRANSFER (ta, 1);
1349} 1771}
1350 1772
1351/** Coro ********************************************************************/ 1773/** Coro ********************************************************************/
1352 1774
1353static void 1775INLINE void
1354coro_enq (pTHX_ SV *coro_sv) 1776coro_enq (pTHX_ struct coro *coro)
1355{ 1777{
1356 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1778 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1357}
1358 1779
1359static SV * 1780 SvREFCNT_inc_NN (coro->hv);
1781
1782 coro->next_ready = 0;
1783 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1784 ready [1] = coro;
1785}
1786
1787INLINE struct coro *
1360coro_deq (pTHX) 1788coro_deq (pTHX)
1361{ 1789{
1362 int prio; 1790 int prio;
1363 1791
1364 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1792 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1365 if (AvFILLp (coro_ready [prio]) >= 0) 1793 {
1366 return av_shift (coro_ready [prio]); 1794 struct coro **ready = coro_ready [prio];
1795
1796 if (ready [0])
1797 {
1798 struct coro *coro = ready [0];
1799 ready [0] = coro->next_ready;
1800 return coro;
1801 }
1802 }
1367 1803
1368 return 0; 1804 return 0;
1369} 1805}
1370 1806
1807static void
1808invoke_sv_ready_hook_helper (void)
1809{
1810 dTHX;
1811 dSP;
1812
1813 ENTER;
1814 SAVETMPS;
1815
1816 PUSHMARK (SP);
1817 PUTBACK;
1818 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1819
1820 FREETMPS;
1821 LEAVE;
1822}
1823
1371static int 1824static int
1372api_ready (SV *coro_sv) 1825api_ready (pTHX_ SV *coro_sv)
1373{ 1826{
1374 dTHX;
1375 struct coro *coro;
1376
1377 if (SvROK (coro_sv))
1378 coro_sv = SvRV (coro_sv);
1379
1380 coro = SvSTATE (coro_sv); 1827 struct coro *coro = SvSTATE (coro_sv);
1381 1828
1382 if (coro->flags & CF_READY) 1829 if (coro->flags & CF_READY)
1383 return 0; 1830 return 0;
1384 1831
1385 coro->flags |= CF_READY; 1832 coro->flags |= CF_READY;
1386 1833
1387 LOCK; 1834 coro_enq (aTHX_ coro);
1388 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1835
1389 ++coro_nready; 1836 if (!coro_nready++)
1390 UNLOCK; 1837 if (coroapi.readyhook)
1838 coroapi.readyhook ();
1391 1839
1392 return 1; 1840 return 1;
1393} 1841}
1394 1842
1395static int 1843static int
1396api_is_ready (SV *coro_sv) 1844api_is_ready (pTHX_ SV *coro_sv)
1397{ 1845{
1398 dTHX;
1399 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1846 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1400} 1847}
1401 1848
1402static void 1849/* expects to own a reference to next->hv */
1850INLINE void
1403prepare_schedule (pTHX_ struct transfer_args *ta) 1851prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1404{ 1852{
1405 SV *prev_sv, *next_sv;
1406
1407 for (;;)
1408 {
1409 LOCK;
1410 next_sv = coro_deq (aTHX);
1411
1412 /* nothing to schedule: call the idle handler */
1413 if (expect_false (!next_sv))
1414 {
1415 dSP;
1416 UNLOCK;
1417
1418 ENTER;
1419 SAVETMPS;
1420
1421 PUSHMARK (SP);
1422 PUTBACK;
1423 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1424 SPAGAIN;
1425
1426 FREETMPS;
1427 LEAVE;
1428 continue;
1429 }
1430
1431 ta->next = SvSTATE (next_sv);
1432
1433 /* cannot transfer to destroyed coros, skip and look for next */
1434 if (expect_false (ta->next->flags & CF_DESTROYED))
1435 {
1436 UNLOCK;
1437 SvREFCNT_dec (next_sv);
1438 /* coro_nready is already taken care of by destroy */
1439 continue;
1440 }
1441
1442 --coro_nready;
1443 UNLOCK;
1444 break;
1445 }
1446
1447 /* free this only after the transfer */
1448 prev_sv = SvRV (coro_current); 1853 SV *prev_sv = SvRV (coro_current);
1854
1449 ta->prev = SvSTATE (prev_sv); 1855 ta->prev = SvSTATE_hv (prev_sv);
1856 ta->next = next;
1857
1450 TRANSFER_CHECK (*ta); 1858 TRANSFER_CHECK (*ta);
1451 assert (ta->next->flags & CF_READY); 1859
1452 ta->next->flags &= ~CF_READY;
1453 SvRV_set (coro_current, next_sv); 1860 SvRV_set (coro_current, (SV *)next->hv);
1454 1861
1455 LOCK;
1456 free_coro_mortal (aTHX); 1862 free_coro_mortal (aTHX);
1457 coro_mortal = prev_sv; 1863 coro_mortal = prev_sv;
1458 UNLOCK;
1459} 1864}
1460 1865
1461static void 1866static void
1867prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1868{
1869 for (;;)
1870 {
1871 struct coro *next = coro_deq (aTHX);
1872
1873 if (expect_true (next))
1874 {
1875 /* cannot transfer to destroyed coros, skip and look for next */
1876 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1877 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1878 else
1879 {
1880 next->flags &= ~CF_READY;
1881 --coro_nready;
1882
1883 prepare_schedule_to (aTHX_ ta, next);
1884 break;
1885 }
1886 }
1887 else
1888 {
1889 /* nothing to schedule: call the idle handler */
1890 if (SvROK (sv_idle)
1891 && SvOBJECT (SvRV (sv_idle)))
1892 {
1893 if (SvRV (sv_idle) == SvRV (coro_current))
1894 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1895
1896 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1897 api_ready (aTHX_ SvRV (sv_idle));
1898 --coro_nready;
1899 }
1900 else
1901 {
1902 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1903 dSP;
1904
1905 ENTER;
1906 SAVETMPS;
1907
1908 PUSHMARK (SP);
1909 PUTBACK;
1910 call_sv (sv_idle, G_VOID | G_DISCARD);
1911
1912 FREETMPS;
1913 LEAVE;
1914 }
1915 }
1916 }
1917}
1918
1919INLINE void
1462prepare_cede (pTHX_ struct transfer_args *ta) 1920prepare_cede (pTHX_ struct coro_transfer_args *ta)
1463{ 1921{
1464 api_ready (coro_current); 1922 api_ready (aTHX_ coro_current);
1465 prepare_schedule (aTHX_ ta); 1923 prepare_schedule (aTHX_ ta);
1466} 1924}
1467 1925
1926INLINE void
1927prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1928{
1929 SV *prev = SvRV (coro_current);
1930
1931 if (coro_nready)
1932 {
1933 prepare_schedule (aTHX_ ta);
1934 api_ready (aTHX_ prev);
1935 }
1936 else
1937 prepare_nop (aTHX_ ta);
1938}
1939
1940static void
1941api_schedule (pTHX)
1942{
1943 struct coro_transfer_args ta;
1944
1945 prepare_schedule (aTHX_ &ta);
1946 TRANSFER (ta, 1);
1947}
1948
1949static void
1950api_schedule_to (pTHX_ SV *coro_sv)
1951{
1952 struct coro_transfer_args ta;
1953 struct coro *next = SvSTATE (coro_sv);
1954
1955 SvREFCNT_inc_NN (coro_sv);
1956 prepare_schedule_to (aTHX_ &ta, next);
1957}
1958
1468static int 1959static int
1469prepare_cede_notself (pTHX_ struct transfer_args *ta) 1960api_cede (pTHX)
1470{ 1961{
1471 if (coro_nready) 1962 struct coro_transfer_args ta;
1472 { 1963
1473 SV *prev = SvRV (coro_current);
1474 prepare_schedule (aTHX_ ta); 1964 prepare_cede (aTHX_ &ta);
1475 api_ready (prev); 1965
1966 if (expect_true (ta.prev != ta.next))
1967 {
1968 TRANSFER (ta, 1);
1476 return 1; 1969 return 1;
1477 } 1970 }
1478 else 1971 else
1479 return 0; 1972 return 0;
1480} 1973}
1481 1974
1482static void
1483api_schedule (void)
1484{
1485 dTHX;
1486 struct transfer_args ta;
1487
1488 prepare_schedule (aTHX_ &ta);
1489 TRANSFER (ta, 1);
1490}
1491
1492static int 1975static int
1493api_cede (void) 1976api_cede_notself (pTHX)
1494{ 1977{
1495 dTHX; 1978 if (coro_nready)
1979 {
1496 struct transfer_args ta; 1980 struct coro_transfer_args ta;
1497 1981
1498 prepare_cede (aTHX_ &ta); 1982 prepare_cede_notself (aTHX_ &ta);
1499
1500 if (expect_true (ta.prev != ta.next))
1501 {
1502 TRANSFER (ta, 1); 1983 TRANSFER (ta, 1);
1503 return 1; 1984 return 1;
1504 } 1985 }
1505 else 1986 else
1506 return 0; 1987 return 0;
1507} 1988}
1508 1989
1509static int 1990static void
1510api_cede_notself (void)
1511{
1512 dTHX;
1513 struct transfer_args ta;
1514
1515 if (prepare_cede_notself (aTHX_ &ta))
1516 {
1517 TRANSFER (ta, 1);
1518 return 1;
1519 }
1520 else
1521 return 0;
1522}
1523
1524static void
1525api_trace (SV *coro_sv, int flags) 1991api_trace (pTHX_ SV *coro_sv, int flags)
1526{ 1992{
1527 dTHX;
1528 struct coro *coro = SvSTATE (coro_sv); 1993 struct coro *coro = SvSTATE (coro_sv);
1529 1994
1995 if (coro->flags & CF_RUNNING)
1996 croak ("cannot enable tracing on a running coroutine, caught");
1997
1530 if (flags & CC_TRACE) 1998 if (flags & CC_TRACE)
1531 { 1999 {
1532 if (!coro->cctx) 2000 if (!coro->cctx)
1533 coro->cctx = cctx_new (); 2001 coro->cctx = cctx_new_run ();
1534 else if (!(coro->cctx->flags & CC_TRACE)) 2002 else if (!(coro->cctx->flags & CC_TRACE))
1535 croak ("cannot enable tracing on coroutine with custom stack"); 2003 croak ("cannot enable tracing on coroutine with custom stack, caught");
1536 2004
1537 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 2005 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1538 } 2006 }
1539 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 2007 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1540 { 2008 {
… …
1545 else 2013 else
1546 coro->slot->runops = RUNOPS_DEFAULT; 2014 coro->slot->runops = RUNOPS_DEFAULT;
1547 } 2015 }
1548} 2016}
1549 2017
2018static void
2019coro_call_on_destroy (pTHX_ struct coro *coro)
2020{
2021 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
2022
2023 if (on_destroyp)
2024 {
2025 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
2026 AV *on_destroy = sv_2mortal (SvREFCNT_inc ((AV *)SvRV (*on_destroyp)));
2027 AV *status = statusp ? sv_2mortal (SvREFCNT_inc ((AV *)SvRV (*statusp))) : 0;
2028
2029 while (AvFILLp (on_destroy) >= 0)
2030 {
2031 dSP; /* don't disturb outer sp */
2032 SV *cb = av_pop (on_destroy);
2033
2034 PUSHMARK (SP);
2035
2036 if (statusp)
2037 {
2038 int i;
2039 EXTEND (SP, AvFILLp (status) + 1);
2040
2041 for (i = 0; i <= AvFILLp (status); ++i)
2042 PUSHs (AvARRAY (status)[i]);
2043 }
2044
2045 PUTBACK;
2046 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
2047 }
2048 }
2049}
2050
2051static void
2052coro_set_status (HV *coro_hv, SV **arg, int items)
2053{
2054 AV *av = newAV ();
2055
2056 /* items are actually not so common, so optimise for this case */
2057 if (items)
2058 {
2059 int i;
2060
2061 av_extend (av, items - 1);
2062
2063 for (i = 0; i < items; ++i)
2064 av_push (av, SvREFCNT_inc_NN (arg [i]));
2065 }
2066
2067 hv_store (coro_hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
2068}
2069
2070static void
2071slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2072{
2073 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2074 api_ready (aTHX_ sv_manager);
2075
2076 frame->prepare = prepare_schedule;
2077 frame->check = slf_check_repeat;
2078
2079 /* as a minor optimisation, we could unwind all stacks here */
2080 /* but that puts extra pressure on pp_slf, and is not worth much */
2081 /*coro_unwind_stacks (aTHX);*/
2082}
2083
2084static void
2085slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2086{
2087 HV *coro_hv = (HV *)SvRV (coro_current);
2088
2089 coro_set_status (coro_hv, arg, items);
2090 slf_init_terminate_cancel_common (frame, coro_hv);
2091}
2092
2093static void
2094slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2095{
2096 HV *coro_hv;
2097 struct coro *coro;
2098
2099 if (items <= 0)
2100 croak ("Coro::cancel called without coro object,");
2101
2102 coro = SvSTATE (arg [0]);
2103 coro_hv = coro->hv;
2104
2105 coro_set_status (coro_hv, arg + 1, items - 1);
2106
2107 if (expect_false (coro->flags & CF_NOCANCEL))
2108 {
2109 /* coro currently busy cancelling something, so just notify it */
2110 coro->slf_frame.data = (void *)coro;
2111
2112 frame->prepare = prepare_nop;
2113 frame->check = slf_check_nop;
2114 }
2115 else if (coro_hv == (HV *)SvRV (coro_current))
2116 {
2117 /* cancelling the current coro is allowed, and equals terminate */
2118 slf_init_terminate_cancel_common (frame, coro_hv);
2119 }
2120 else
2121 {
2122 struct coro *self = SvSTATE_current;
2123
2124 /* otherwise we cancel directly, purely for speed reasons
2125 * unfortunately, this requires some magic trickery, as
2126 * somebody else could cancel us, so we have to fight the cancellation.
2127 * this is ugly, and hopefully fully worth the extra speed.
2128 * besides, I can't get the slow-but-safe version working...
2129 */
2130 slf_frame.data = 0;
2131 self->flags |= CF_NOCANCEL;
2132
2133 coro_state_destroy (aTHX_ coro);
2134 coro_call_on_destroy (aTHX_ coro);
2135
2136 self->flags &= ~CF_NOCANCEL;
2137
2138 if (slf_frame.data)
2139 {
2140 /* while we were busy we have been cancelled, so terminate */
2141 slf_init_terminate_cancel_common (frame, self->hv);
2142 }
2143 else
2144 {
2145 frame->prepare = prepare_nop;
2146 frame->check = slf_check_nop;
2147 }
2148 }
2149}
2150
2151/*****************************************************************************/
2152/* async pool handler */
2153
2154static int
2155slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2156{
2157 HV *hv = (HV *)SvRV (coro_current);
2158 struct coro *coro = (struct coro *)frame->data;
2159
2160 if (!coro->invoke_cb)
2161 return 1; /* loop till we have invoke */
2162 else
2163 {
2164 hv_store (hv, "desc", sizeof ("desc") - 1,
2165 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2166
2167 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2168
2169 {
2170 dSP;
2171 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2172 PUTBACK;
2173 }
2174
2175 SvREFCNT_dec (GvAV (PL_defgv));
2176 GvAV (PL_defgv) = coro->invoke_av;
2177 coro->invoke_av = 0;
2178
2179 return 0;
2180 }
2181}
2182
2183static void
2184slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2185{
2186 HV *hv = (HV *)SvRV (coro_current);
2187 struct coro *coro = SvSTATE_hv ((SV *)hv);
2188
2189 if (expect_true (coro->saved_deffh))
2190 {
2191 /* subsequent iteration */
2192 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2193 coro->saved_deffh = 0;
2194
2195 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2196 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2197 {
2198 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
2199 coro->invoke_av = newAV ();
2200
2201 frame->prepare = prepare_nop;
2202 }
2203 else
2204 {
2205 av_clear (GvAV (PL_defgv));
2206 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2207
2208 coro->prio = 0;
2209
2210 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2211 api_trace (aTHX_ coro_current, 0);
2212
2213 frame->prepare = prepare_schedule;
2214 av_push (av_async_pool, SvREFCNT_inc (hv));
2215 }
2216 }
2217 else
2218 {
2219 /* first iteration, simply fall through */
2220 frame->prepare = prepare_nop;
2221 }
2222
2223 frame->check = slf_check_pool_handler;
2224 frame->data = (void *)coro;
2225}
2226
2227/*****************************************************************************/
2228/* rouse callback */
2229
2230#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2231
2232static void
2233coro_rouse_callback (pTHX_ CV *cv)
2234{
2235 dXSARGS;
2236 SV *data = (SV *)S_GENSUB_ARG;
2237
2238 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2239 {
2240 /* first call, set args */
2241 SV *coro = SvRV (data);
2242 AV *av = newAV ();
2243
2244 SvRV_set (data, (SV *)av);
2245
2246 /* better take a full copy of the arguments */
2247 while (items--)
2248 av_store (av, items, newSVsv (ST (items)));
2249
2250 api_ready (aTHX_ coro);
2251 SvREFCNT_dec (coro);
2252 }
2253
2254 XSRETURN_EMPTY;
2255}
2256
2257static int
2258slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2259{
2260 SV *data = (SV *)frame->data;
2261
2262 if (CORO_THROW)
2263 return 0;
2264
2265 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2266 return 1;
2267
2268 /* now push all results on the stack */
2269 {
2270 dSP;
2271 AV *av = (AV *)SvRV (data);
2272 int i;
2273
2274 EXTEND (SP, AvFILLp (av) + 1);
2275 for (i = 0; i <= AvFILLp (av); ++i)
2276 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2277
2278 /* we have stolen the elements, so set length to zero and free */
2279 AvFILLp (av) = -1;
2280 av_undef (av);
2281
2282 PUTBACK;
2283 }
2284
2285 return 0;
2286}
2287
2288static void
2289slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2290{
2291 SV *cb;
2292
2293 if (items)
2294 cb = arg [0];
2295 else
2296 {
2297 struct coro *coro = SvSTATE_current;
2298
2299 if (!coro->rouse_cb)
2300 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2301
2302 cb = sv_2mortal (coro->rouse_cb);
2303 coro->rouse_cb = 0;
2304 }
2305
2306 if (!SvROK (cb)
2307 || SvTYPE (SvRV (cb)) != SVt_PVCV
2308 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2309 croak ("Coro::rouse_wait called with illegal callback argument,");
2310
2311 {
2312 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2313 SV *data = (SV *)S_GENSUB_ARG;
2314
2315 frame->data = (void *)data;
2316 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2317 frame->check = slf_check_rouse_wait;
2318 }
2319}
2320
2321static SV *
2322coro_new_rouse_cb (pTHX)
2323{
2324 HV *hv = (HV *)SvRV (coro_current);
2325 struct coro *coro = SvSTATE_hv (hv);
2326 SV *data = newRV_inc ((SV *)hv);
2327 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2328
2329 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2330 SvREFCNT_dec (data); /* magicext increases the refcount */
2331
2332 SvREFCNT_dec (coro->rouse_cb);
2333 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2334
2335 return cb;
2336}
2337
2338/*****************************************************************************/
2339/* schedule-like-function opcode (SLF) */
2340
2341static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2342static const CV *slf_cv;
2343static SV **slf_argv;
2344static int slf_argc, slf_arga; /* count, allocated */
2345static I32 slf_ax; /* top of stack, for restore */
2346
2347/* this restores the stack in the case we patched the entersub, to */
2348/* recreate the stack frame as perl will on following calls */
2349/* since entersub cleared the stack */
2350static OP *
2351pp_restore (pTHX)
2352{
2353 int i;
2354 SV **SP = PL_stack_base + slf_ax;
2355
2356 PUSHMARK (SP);
2357
2358 EXTEND (SP, slf_argc + 1);
2359
2360 for (i = 0; i < slf_argc; ++i)
2361 PUSHs (sv_2mortal (slf_argv [i]));
2362
2363 PUSHs ((SV *)CvGV (slf_cv));
2364
2365 RETURNOP (slf_restore.op_first);
2366}
2367
2368static void
2369slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2370{
2371 SV **arg = (SV **)slf_frame.data;
2372
2373 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2374}
2375
2376static void
2377slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2378{
2379 if (items != 2)
2380 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2381
2382 frame->prepare = slf_prepare_transfer;
2383 frame->check = slf_check_nop;
2384 frame->data = (void *)arg; /* let's hope it will stay valid */
2385}
2386
2387static void
2388slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2389{
2390 frame->prepare = prepare_schedule;
2391 frame->check = slf_check_nop;
2392}
2393
2394static void
2395slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2396{
2397 struct coro *next = (struct coro *)slf_frame.data;
2398
2399 SvREFCNT_inc_NN (next->hv);
2400 prepare_schedule_to (aTHX_ ta, next);
2401}
2402
2403static void
2404slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2405{
2406 if (!items)
2407 croak ("Coro::schedule_to expects a coroutine argument, caught");
2408
2409 frame->data = (void *)SvSTATE (arg [0]);
2410 frame->prepare = slf_prepare_schedule_to;
2411 frame->check = slf_check_nop;
2412}
2413
2414static void
2415slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2416{
2417 api_ready (aTHX_ SvRV (coro_current));
2418
2419 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2420}
2421
2422static void
2423slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2424{
2425 frame->prepare = prepare_cede;
2426 frame->check = slf_check_nop;
2427}
2428
2429static void
2430slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2431{
2432 frame->prepare = prepare_cede_notself;
2433 frame->check = slf_check_nop;
2434}
2435
2436/*
2437 * these not obviously related functions are all rolled into one
2438 * function to increase chances that they all will call transfer with the same
2439 * stack offset
2440 * SLF stands for "schedule-like-function".
2441 */
2442static OP *
2443pp_slf (pTHX)
2444{
2445 I32 checkmark; /* mark SP to see how many elements check has pushed */
2446
2447 /* set up the slf frame, unless it has already been set-up */
2448 /* the latter happens when a new coro has been started */
2449 /* or when a new cctx was attached to an existing coroutine */
2450 if (expect_true (!slf_frame.prepare))
2451 {
2452 /* first iteration */
2453 dSP;
2454 SV **arg = PL_stack_base + TOPMARK + 1;
2455 int items = SP - arg; /* args without function object */
2456 SV *gv = *sp;
2457
2458 /* do a quick consistency check on the "function" object, and if it isn't */
2459 /* for us, divert to the real entersub */
2460 if (SvTYPE (gv) != SVt_PVGV
2461 || !GvCV (gv)
2462 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2463 return PL_ppaddr[OP_ENTERSUB](aTHX);
2464
2465 if (!(PL_op->op_flags & OPf_STACKED))
2466 {
2467 /* ampersand-form of call, use @_ instead of stack */
2468 AV *av = GvAV (PL_defgv);
2469 arg = AvARRAY (av);
2470 items = AvFILLp (av) + 1;
2471 }
2472
2473 /* now call the init function, which needs to set up slf_frame */
2474 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2475 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2476
2477 /* pop args */
2478 SP = PL_stack_base + POPMARK;
2479
2480 PUTBACK;
2481 }
2482
2483 /* now that we have a slf_frame, interpret it! */
2484 /* we use a callback system not to make the code needlessly */
2485 /* complicated, but so we can run multiple perl coros from one cctx */
2486
2487 do
2488 {
2489 struct coro_transfer_args ta;
2490
2491 slf_frame.prepare (aTHX_ &ta);
2492 TRANSFER (ta, 0);
2493
2494 checkmark = PL_stack_sp - PL_stack_base;
2495 }
2496 while (slf_frame.check (aTHX_ &slf_frame));
2497
2498 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2499
2500 /* exception handling */
2501 if (expect_false (CORO_THROW))
2502 {
2503 SV *exception = sv_2mortal (CORO_THROW);
2504
2505 CORO_THROW = 0;
2506 sv_setsv (ERRSV, exception);
2507 croak (0);
2508 }
2509
2510 /* return value handling - mostly like entersub */
2511 /* make sure we put something on the stack in scalar context */
2512 if (GIMME_V == G_SCALAR)
2513 {
2514 dSP;
2515 SV **bot = PL_stack_base + checkmark;
2516
2517 if (sp == bot) /* too few, push undef */
2518 bot [1] = &PL_sv_undef;
2519 else if (sp != bot + 1) /* too many, take last one */
2520 bot [1] = *sp;
2521
2522 SP = bot + 1;
2523
2524 PUTBACK;
2525 }
2526
2527 return NORMAL;
2528}
2529
2530static void
2531api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2532{
2533 int i;
2534 SV **arg = PL_stack_base + ax;
2535 int items = PL_stack_sp - arg + 1;
2536
2537 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2538
2539 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2540 && PL_op->op_ppaddr != pp_slf)
2541 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2542
2543 CvFLAGS (cv) |= CVf_SLF;
2544 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2545 slf_cv = cv;
2546
2547 /* we patch the op, and then re-run the whole call */
2548 /* we have to put the same argument on the stack for this to work */
2549 /* and this will be done by pp_restore */
2550 slf_restore.op_next = (OP *)&slf_restore;
2551 slf_restore.op_type = OP_CUSTOM;
2552 slf_restore.op_ppaddr = pp_restore;
2553 slf_restore.op_first = PL_op;
2554
2555 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2556
2557 if (PL_op->op_flags & OPf_STACKED)
2558 {
2559 if (items > slf_arga)
2560 {
2561 slf_arga = items;
2562 Safefree (slf_argv);
2563 New (0, slf_argv, slf_arga, SV *);
2564 }
2565
2566 slf_argc = items;
2567
2568 for (i = 0; i < items; ++i)
2569 slf_argv [i] = SvREFCNT_inc (arg [i]);
2570 }
2571 else
2572 slf_argc = 0;
2573
2574 PL_op->op_ppaddr = pp_slf;
2575 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2576
2577 PL_op = (OP *)&slf_restore;
2578}
2579
2580/*****************************************************************************/
2581/* dynamic wind */
2582
2583static void
2584on_enterleave_call (pTHX_ SV *cb)
2585{
2586 dSP;
2587
2588 PUSHSTACK;
2589
2590 PUSHMARK (SP);
2591 PUTBACK;
2592 call_sv (cb, G_VOID | G_DISCARD);
2593 SPAGAIN;
2594
2595 POPSTACK;
2596}
2597
2598static SV *
2599coro_avp_pop_and_free (pTHX_ AV **avp)
2600{
2601 AV *av = *avp;
2602 SV *res = av_pop (av);
2603
2604 if (AvFILLp (av) < 0)
2605 {
2606 *avp = 0;
2607 SvREFCNT_dec (av);
2608 }
2609
2610 return res;
2611}
2612
2613static void
2614coro_pop_on_enter (pTHX_ void *coro)
2615{
2616 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2617 SvREFCNT_dec (cb);
2618}
2619
2620static void
2621coro_pop_on_leave (pTHX_ void *coro)
2622{
2623 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2624 on_enterleave_call (aTHX_ sv_2mortal (cb));
2625}
2626
2627/*****************************************************************************/
2628/* PerlIO::cede */
2629
2630typedef struct
2631{
2632 PerlIOBuf base;
2633 NV next, every;
2634} PerlIOCede;
2635
2636static IV
2637PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2638{
2639 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2640
2641 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2642 self->next = nvtime () + self->every;
2643
2644 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2645}
2646
2647static SV *
2648PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2649{
2650 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2651
2652 return newSVnv (self->every);
2653}
2654
2655static IV
2656PerlIOCede_flush (pTHX_ PerlIO *f)
2657{
2658 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2659 double now = nvtime ();
2660
2661 if (now >= self->next)
2662 {
2663 api_cede (aTHX);
2664 self->next = now + self->every;
2665 }
2666
2667 return PerlIOBuf_flush (aTHX_ f);
2668}
2669
2670static PerlIO_funcs PerlIO_cede =
2671{
2672 sizeof(PerlIO_funcs),
2673 "cede",
2674 sizeof(PerlIOCede),
2675 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2676 PerlIOCede_pushed,
2677 PerlIOBuf_popped,
2678 PerlIOBuf_open,
2679 PerlIOBase_binmode,
2680 PerlIOCede_getarg,
2681 PerlIOBase_fileno,
2682 PerlIOBuf_dup,
2683 PerlIOBuf_read,
2684 PerlIOBuf_unread,
2685 PerlIOBuf_write,
2686 PerlIOBuf_seek,
2687 PerlIOBuf_tell,
2688 PerlIOBuf_close,
2689 PerlIOCede_flush,
2690 PerlIOBuf_fill,
2691 PerlIOBase_eof,
2692 PerlIOBase_error,
2693 PerlIOBase_clearerr,
2694 PerlIOBase_setlinebuf,
2695 PerlIOBuf_get_base,
2696 PerlIOBuf_bufsiz,
2697 PerlIOBuf_get_ptr,
2698 PerlIOBuf_get_cnt,
2699 PerlIOBuf_set_ptrcnt,
2700};
2701
2702/*****************************************************************************/
2703/* Coro::Semaphore & Coro::Signal */
2704
2705static SV *
2706coro_waitarray_new (pTHX_ int count)
2707{
2708 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2709 AV *av = newAV ();
2710 SV **ary;
2711
2712 /* unfortunately, building manually saves memory */
2713 Newx (ary, 2, SV *);
2714 AvALLOC (av) = ary;
2715#if PERL_VERSION_ATLEAST (5,10,0)
2716 AvARRAY (av) = ary;
2717#else
2718 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2719 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2720 SvPVX ((SV *)av) = (char *)ary;
2721#endif
2722 AvMAX (av) = 1;
2723 AvFILLp (av) = 0;
2724 ary [0] = newSViv (count);
2725
2726 return newRV_noinc ((SV *)av);
2727}
2728
2729/* semaphore */
2730
2731static void
2732coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2733{
2734 SV *count_sv = AvARRAY (av)[0];
2735 IV count = SvIVX (count_sv);
2736
2737 count += adjust;
2738 SvIVX (count_sv) = count;
2739
2740 /* now wake up as many waiters as are expected to lock */
2741 while (count > 0 && AvFILLp (av) > 0)
2742 {
2743 SV *cb;
2744
2745 /* swap first two elements so we can shift a waiter */
2746 AvARRAY (av)[0] = AvARRAY (av)[1];
2747 AvARRAY (av)[1] = count_sv;
2748 cb = av_shift (av);
2749
2750 if (SvOBJECT (cb))
2751 {
2752 api_ready (aTHX_ cb);
2753 --count;
2754 }
2755 else if (SvTYPE (cb) == SVt_PVCV)
2756 {
2757 dSP;
2758 PUSHMARK (SP);
2759 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2760 PUTBACK;
2761 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2762 }
2763
2764 SvREFCNT_dec (cb);
2765 }
2766}
2767
2768static void
2769coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2770{
2771 /* call $sem->adjust (0) to possibly wake up some other waiters */
2772 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2773}
2774
2775static int
2776slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2777{
2778 AV *av = (AV *)frame->data;
2779 SV *count_sv = AvARRAY (av)[0];
2780
2781 /* if we are about to throw, don't actually acquire the lock, just throw */
2782 if (CORO_THROW)
2783 return 0;
2784 else if (SvIVX (count_sv) > 0)
2785 {
2786 SvSTATE_current->on_destroy = 0;
2787
2788 if (acquire)
2789 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2790 else
2791 coro_semaphore_adjust (aTHX_ av, 0);
2792
2793 return 0;
2794 }
2795 else
2796 {
2797 int i;
2798 /* if we were woken up but can't down, we look through the whole */
2799 /* waiters list and only add us if we aren't in there already */
2800 /* this avoids some degenerate memory usage cases */
2801
2802 for (i = 1; i <= AvFILLp (av); ++i)
2803 if (AvARRAY (av)[i] == SvRV (coro_current))
2804 return 1;
2805
2806 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2807 return 1;
2808 }
2809}
2810
2811static int
2812slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2813{
2814 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2815}
2816
2817static int
2818slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2819{
2820 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2821}
2822
2823static void
2824slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2825{
2826 AV *av = (AV *)SvRV (arg [0]);
2827
2828 if (SvIVX (AvARRAY (av)[0]) > 0)
2829 {
2830 frame->data = (void *)av;
2831 frame->prepare = prepare_nop;
2832 }
2833 else
2834 {
2835 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2836
2837 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2838 frame->prepare = prepare_schedule;
2839
2840 /* to avoid race conditions when a woken-up coro gets terminated */
2841 /* we arrange for a temporary on_destroy that calls adjust (0) */
2842 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2843 }
2844}
2845
2846static void
2847slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2848{
2849 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2850 frame->check = slf_check_semaphore_down;
2851}
2852
2853static void
2854slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2855{
2856 if (items >= 2)
2857 {
2858 /* callback form */
2859 AV *av = (AV *)SvRV (arg [0]);
2860 SV *cb_cv = s_get_cv_croak (arg [1]);
2861
2862 av_push (av, SvREFCNT_inc_NN (cb_cv));
2863
2864 if (SvIVX (AvARRAY (av)[0]) > 0)
2865 coro_semaphore_adjust (aTHX_ av, 0);
2866
2867 frame->prepare = prepare_nop;
2868 frame->check = slf_check_nop;
2869 }
2870 else
2871 {
2872 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2873 frame->check = slf_check_semaphore_wait;
2874 }
2875}
2876
2877/* signal */
2878
2879static void
2880coro_signal_wake (pTHX_ AV *av, int count)
2881{
2882 SvIVX (AvARRAY (av)[0]) = 0;
2883
2884 /* now signal count waiters */
2885 while (count > 0 && AvFILLp (av) > 0)
2886 {
2887 SV *cb;
2888
2889 /* swap first two elements so we can shift a waiter */
2890 cb = AvARRAY (av)[0];
2891 AvARRAY (av)[0] = AvARRAY (av)[1];
2892 AvARRAY (av)[1] = cb;
2893
2894 cb = av_shift (av);
2895
2896 if (SvTYPE (cb) == SVt_PVCV)
2897 {
2898 dSP;
2899 PUSHMARK (SP);
2900 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2901 PUTBACK;
2902 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2903 }
2904 else
2905 {
2906 api_ready (aTHX_ cb);
2907 sv_setiv (cb, 0); /* signal waiter */
2908 }
2909
2910 SvREFCNT_dec (cb);
2911
2912 --count;
2913 }
2914}
2915
2916static int
2917slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2918{
2919 /* if we are about to throw, also stop waiting */
2920 return SvROK ((SV *)frame->data) && !CORO_THROW;
2921}
2922
2923static void
2924slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2925{
2926 AV *av = (AV *)SvRV (arg [0]);
2927
2928 if (items >= 2)
2929 {
2930 SV *cb_cv = s_get_cv_croak (arg [1]);
2931 av_push (av, SvREFCNT_inc_NN (cb_cv));
2932
2933 if (SvIVX (AvARRAY (av)[0]))
2934 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
2935
2936 frame->prepare = prepare_nop;
2937 frame->check = slf_check_nop;
2938 }
2939 else if (SvIVX (AvARRAY (av)[0]))
2940 {
2941 SvIVX (AvARRAY (av)[0]) = 0;
2942 frame->prepare = prepare_nop;
2943 frame->check = slf_check_nop;
2944 }
2945 else
2946 {
2947 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2948
2949 av_push (av, waiter);
2950
2951 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2952 frame->prepare = prepare_schedule;
2953 frame->check = slf_check_signal_wait;
2954 }
2955}
2956
2957/*****************************************************************************/
2958/* Coro::AIO */
2959
2960#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2961
2962/* helper storage struct */
2963struct io_state
2964{
2965 int errorno;
2966 I32 laststype; /* U16 in 5.10.0 */
2967 int laststatval;
2968 Stat_t statcache;
2969};
2970
2971static void
2972coro_aio_callback (pTHX_ CV *cv)
2973{
2974 dXSARGS;
2975 AV *state = (AV *)S_GENSUB_ARG;
2976 SV *coro = av_pop (state);
2977 SV *data_sv = newSV (sizeof (struct io_state));
2978
2979 av_extend (state, items - 1);
2980
2981 sv_upgrade (data_sv, SVt_PV);
2982 SvCUR_set (data_sv, sizeof (struct io_state));
2983 SvPOK_only (data_sv);
2984
2985 {
2986 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2987
2988 data->errorno = errno;
2989 data->laststype = PL_laststype;
2990 data->laststatval = PL_laststatval;
2991 data->statcache = PL_statcache;
2992 }
2993
2994 /* now build the result vector out of all the parameters and the data_sv */
2995 {
2996 int i;
2997
2998 for (i = 0; i < items; ++i)
2999 av_push (state, SvREFCNT_inc_NN (ST (i)));
3000 }
3001
3002 av_push (state, data_sv);
3003
3004 api_ready (aTHX_ coro);
3005 SvREFCNT_dec (coro);
3006 SvREFCNT_dec ((AV *)state);
3007}
3008
3009static int
3010slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3011{
3012 AV *state = (AV *)frame->data;
3013
3014 /* if we are about to throw, return early */
3015 /* this does not cancel the aio request, but at least */
3016 /* it quickly returns */
3017 if (CORO_THROW)
3018 return 0;
3019
3020 /* one element that is an RV? repeat! */
3021 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3022 return 1;
3023
3024 /* restore status */
3025 {
3026 SV *data_sv = av_pop (state);
3027 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3028
3029 errno = data->errorno;
3030 PL_laststype = data->laststype;
3031 PL_laststatval = data->laststatval;
3032 PL_statcache = data->statcache;
3033
3034 SvREFCNT_dec (data_sv);
3035 }
3036
3037 /* push result values */
3038 {
3039 dSP;
3040 int i;
3041
3042 EXTEND (SP, AvFILLp (state) + 1);
3043 for (i = 0; i <= AvFILLp (state); ++i)
3044 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3045
3046 PUTBACK;
3047 }
3048
3049 return 0;
3050}
3051
3052static void
3053slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3054{
3055 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3056 SV *coro_hv = SvRV (coro_current);
3057 struct coro *coro = SvSTATE_hv (coro_hv);
3058
3059 /* put our coroutine id on the state arg */
3060 av_push (state, SvREFCNT_inc_NN (coro_hv));
3061
3062 /* first see whether we have a non-zero priority and set it as AIO prio */
3063 if (coro->prio)
3064 {
3065 dSP;
3066
3067 static SV *prio_cv;
3068 static SV *prio_sv;
3069
3070 if (expect_false (!prio_cv))
3071 {
3072 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3073 prio_sv = newSViv (0);
3074 }
3075
3076 PUSHMARK (SP);
3077 sv_setiv (prio_sv, coro->prio);
3078 XPUSHs (prio_sv);
3079
3080 PUTBACK;
3081 call_sv (prio_cv, G_VOID | G_DISCARD);
3082 }
3083
3084 /* now call the original request */
3085 {
3086 dSP;
3087 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3088 int i;
3089
3090 PUSHMARK (SP);
3091
3092 /* first push all args to the stack */
3093 EXTEND (SP, items + 1);
3094
3095 for (i = 0; i < items; ++i)
3096 PUSHs (arg [i]);
3097
3098 /* now push the callback closure */
3099 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3100
3101 /* now call the AIO function - we assume our request is uncancelable */
3102 PUTBACK;
3103 call_sv ((SV *)req, G_VOID | G_DISCARD);
3104 }
3105
3106 /* now that the request is going, we loop till we have a result */
3107 frame->data = (void *)state;
3108 frame->prepare = prepare_schedule;
3109 frame->check = slf_check_aio_req;
3110}
3111
3112static void
3113coro_aio_req_xs (pTHX_ CV *cv)
3114{
3115 dXSARGS;
3116
3117 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3118
3119 XSRETURN_EMPTY;
3120}
3121
3122/*****************************************************************************/
3123
3124#if CORO_CLONE
3125# include "clone.c"
3126#endif
3127
3128/*****************************************************************************/
3129
3130static SV *
3131coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3132{
3133 SV *coro_sv;
3134 struct coro *coro;
3135 MAGIC *mg;
3136 HV *hv;
3137 SV *cb;
3138 int i;
3139
3140 if (argc > 0)
3141 {
3142 cb = s_get_cv_croak (argv [0]);
3143
3144 if (!is_coro)
3145 {
3146 if (CvISXSUB (cb))
3147 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3148
3149 if (!CvROOT (cb))
3150 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3151 }
3152 }
3153
3154 Newz (0, coro, 1, struct coro);
3155 coro->args = newAV ();
3156 coro->flags = CF_NEW;
3157
3158 if (coro_first) coro_first->prev = coro;
3159 coro->next = coro_first;
3160 coro_first = coro;
3161
3162 coro->hv = hv = newHV ();
3163 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3164 mg->mg_flags |= MGf_DUP;
3165 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3166
3167 if (argc > 0)
3168 {
3169 av_extend (coro->args, argc + is_coro - 1);
3170
3171 if (is_coro)
3172 {
3173 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3174 cb = (SV *)cv_coro_run;
3175 }
3176
3177 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3178
3179 for (i = 1; i < argc; i++)
3180 av_push (coro->args, newSVsv (argv [i]));
3181 }
3182
3183 return coro_sv;
3184}
3185
1550MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 3186MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1551 3187
1552PROTOTYPES: DISABLE 3188PROTOTYPES: DISABLE
1553 3189
1554BOOT: 3190BOOT:
1555{ 3191{
1556#ifdef USE_ITHREADS 3192#ifdef USE_ITHREADS
1557 MUTEX_INIT (&coro_mutex); 3193# if CORO_PTHREAD
3194 coro_thx = PERL_GET_CONTEXT;
3195# endif
1558#endif 3196#endif
1559 BOOT_PAGESIZE; 3197 BOOT_PAGESIZE;
1560 3198
3199 cctx_current = cctx_new_empty ();
3200
1561 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 3201 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1562 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 3202 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1563 3203
1564 orig_sigelem_get = PL_vtbl_sigelem.svt_get; 3204 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1565 PL_vtbl_sigelem.svt_get = coro_sigelem_get; 3205 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1566 orig_sigelem_set = PL_vtbl_sigelem.svt_set; 3206 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1567 PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1568 3207
1569 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE); 3208 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1570 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV)); 3209 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1571 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV)); 3210 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1572 3211
… …
1581 main_top_env = PL_top_env; 3220 main_top_env = PL_top_env;
1582 3221
1583 while (main_top_env->je_prev) 3222 while (main_top_env->je_prev)
1584 main_top_env = main_top_env->je_prev; 3223 main_top_env = main_top_env->je_prev;
1585 3224
3225 {
3226 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3227
3228 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3229 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3230
3231 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3232 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3233 }
3234
1586 coroapi.ver = CORO_API_VERSION; 3235 coroapi.ver = CORO_API_VERSION;
1587 coroapi.rev = CORO_API_REVISION; 3236 coroapi.rev = CORO_API_REVISION;
3237
1588 coroapi.transfer = api_transfer; 3238 coroapi.transfer = api_transfer;
1589 3239
3240 coroapi.sv_state = SvSTATE_;
3241 coroapi.execute_slf = api_execute_slf;
3242 coroapi.prepare_nop = prepare_nop;
3243 coroapi.prepare_schedule = prepare_schedule;
3244 coroapi.prepare_cede = prepare_cede;
3245 coroapi.prepare_cede_notself = prepare_cede_notself;
3246
3247 time_init (aTHX);
3248
1590 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3249 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
1591} 3250}
1592 3251
1593SV * 3252SV *
1594new (char *klass, ...) 3253new (SV *klass, ...)
3254 ALIAS:
3255 Coro::new = 1
1595 CODE: 3256 CODE:
1596{ 3257 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1597 struct coro *coro;
1598 MAGIC *mg;
1599 HV *hv;
1600 int i;
1601
1602 Newz (0, coro, 1, struct coro);
1603 coro->args = newAV ();
1604 coro->flags = CF_NEW;
1605
1606 if (coro_first) coro_first->prev = coro;
1607 coro->next = coro_first;
1608 coro_first = coro;
1609
1610 coro->hv = hv = newHV ();
1611 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1612 mg->mg_flags |= MGf_DUP;
1613 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1614
1615 av_extend (coro->args, items - 1);
1616 for (i = 1; i < items; i++)
1617 av_push (coro->args, newSVsv (ST (i)));
1618}
1619 OUTPUT:
1620 RETVAL
1621
1622# these not obviously related functions are all rolled into the same xs
1623# function to increase chances that they all will call transfer with the same
1624# stack offset
1625void
1626_set_stacklevel (...)
1627 ALIAS:
1628 Coro::State::transfer = 1
1629 Coro::schedule = 2
1630 Coro::cede = 3
1631 Coro::cede_notself = 4
1632 CODE:
1633{
1634 struct transfer_args ta;
1635
1636 PUTBACK;
1637 switch (ix)
1638 {
1639 case 0:
1640 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1641 ta.next = 0;
1642 break;
1643
1644 case 1:
1645 if (items != 2)
1646 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1647
1648 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1649 break;
1650
1651 case 2:
1652 prepare_schedule (aTHX_ &ta);
1653 break;
1654
1655 case 3:
1656 prepare_cede (aTHX_ &ta);
1657 break;
1658
1659 case 4:
1660 if (!prepare_cede_notself (aTHX_ &ta))
1661 XSRETURN_EMPTY;
1662
1663 break;
1664 }
1665 SPAGAIN;
1666
1667 BARRIER;
1668 PUTBACK;
1669 TRANSFER (ta, 0);
1670 SPAGAIN; /* might be the sp of a different coroutine now */
1671 /* be extra careful not to ever do anything after TRANSFER */
1672}
1673
1674bool
1675_destroy (SV *coro_sv)
1676 CODE:
1677 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1678 OUTPUT: 3258 OUTPUT:
1679 RETVAL 3259 RETVAL
1680 3260
1681void 3261void
3262transfer (...)
3263 PROTOTYPE: $$
3264 CODE:
3265 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3266
3267void
1682_exit (code) 3268_exit (int code)
1683 int code
1684 PROTOTYPE: $ 3269 PROTOTYPE: $
1685 CODE: 3270 CODE:
1686 _exit (code); 3271 _exit (code);
1687 3272
3273SV *
3274clone (Coro::State coro)
3275 CODE:
3276{
3277#if CORO_CLONE
3278 struct coro *ncoro = coro_clone (aTHX_ coro);
3279 MAGIC *mg;
3280 /* TODO: too much duplication */
3281 ncoro->hv = newHV ();
3282 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3283 mg->mg_flags |= MGf_DUP;
3284 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3285#else
3286 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3287#endif
3288}
3289 OUTPUT:
3290 RETVAL
3291
1688int 3292int
1689cctx_stacksize (int new_stacksize = 0) 3293cctx_stacksize (int new_stacksize = 0)
3294 PROTOTYPE: ;$
1690 CODE: 3295 CODE:
1691 RETVAL = coro_stacksize; 3296 RETVAL = cctx_stacksize;
1692 if (new_stacksize) 3297 if (new_stacksize)
3298 {
1693 coro_stacksize = new_stacksize; 3299 cctx_stacksize = new_stacksize;
3300 ++cctx_gen;
3301 }
1694 OUTPUT: 3302 OUTPUT:
1695 RETVAL 3303 RETVAL
1696 3304
1697int 3305int
3306cctx_max_idle (int max_idle = 0)
3307 PROTOTYPE: ;$
3308 CODE:
3309 RETVAL = cctx_max_idle;
3310 if (max_idle > 1)
3311 cctx_max_idle = max_idle;
3312 OUTPUT:
3313 RETVAL
3314
3315int
1698cctx_count () 3316cctx_count ()
3317 PROTOTYPE:
1699 CODE: 3318 CODE:
1700 RETVAL = cctx_count; 3319 RETVAL = cctx_count;
1701 OUTPUT: 3320 OUTPUT:
1702 RETVAL 3321 RETVAL
1703 3322
1704int 3323int
1705cctx_idle () 3324cctx_idle ()
3325 PROTOTYPE:
1706 CODE: 3326 CODE:
1707 RETVAL = cctx_idle; 3327 RETVAL = cctx_idle;
1708 OUTPUT: 3328 OUTPUT:
1709 RETVAL 3329 RETVAL
1710 3330
1711void 3331void
1712list () 3332list ()
3333 PROTOTYPE:
1713 PPCODE: 3334 PPCODE:
1714{ 3335{
1715 struct coro *coro; 3336 struct coro *coro;
1716 for (coro = coro_first; coro; coro = coro->next) 3337 for (coro = coro_first; coro; coro = coro->next)
1717 if (coro->hv) 3338 if (coro->hv)
… …
1722call (Coro::State coro, SV *coderef) 3343call (Coro::State coro, SV *coderef)
1723 ALIAS: 3344 ALIAS:
1724 eval = 1 3345 eval = 1
1725 CODE: 3346 CODE:
1726{ 3347{
1727 if (coro->mainstack) 3348 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1728 { 3349 {
1729 struct coro temp; 3350 struct coro *current = SvSTATE_current;
3351 struct CoroSLF slf_save;
1730 3352
1731 if (!(coro->flags & CF_RUNNING)) 3353 if (current != coro)
1732 { 3354 {
1733 PUTBACK; 3355 PUTBACK;
1734 save_perl (aTHX_ &temp); 3356 save_perl (aTHX_ current);
1735 load_perl (aTHX_ coro); 3357 load_perl (aTHX_ coro);
3358 /* the coro is most likely in an active SLF call.
3359 * while not strictly required (the code we execute is
3360 * not allowed to call any SLF functions), it's cleaner
3361 * to reinitialise the slf_frame and restore it later.
3362 * This might one day allow us to actually do SLF calls
3363 * from code executed here.
3364 */
3365 slf_save = slf_frame;
3366 slf_frame.prepare = 0;
3367 SPAGAIN;
1736 } 3368 }
1737 3369
1738 {
1739 dSP;
1740 ENTER;
1741 SAVETMPS;
1742 PUTBACK;
1743 PUSHSTACK; 3370 PUSHSTACK;
3371
1744 PUSHMARK (SP); 3372 PUSHMARK (SP);
3373 PUTBACK;
1745 3374
1746 if (ix) 3375 if (ix)
1747 eval_sv (coderef, 0); 3376 eval_sv (coderef, 0);
1748 else 3377 else
1749 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3378 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1750 3379
1751 POPSTACK; 3380 POPSTACK;
1752 SPAGAIN; 3381 SPAGAIN;
1753 FREETMPS;
1754 LEAVE;
1755 PUTBACK;
1756 }
1757 3382
1758 if (!(coro->flags & CF_RUNNING)) 3383 if (current != coro)
1759 { 3384 {
3385 PUTBACK;
3386 slf_frame = slf_save;
1760 save_perl (aTHX_ coro); 3387 save_perl (aTHX_ coro);
1761 load_perl (aTHX_ &temp); 3388 load_perl (aTHX_ current);
1762 SPAGAIN; 3389 SPAGAIN;
1763 } 3390 }
1764 } 3391 }
1765} 3392}
1766 3393
… …
1770 ALIAS: 3397 ALIAS:
1771 is_ready = CF_READY 3398 is_ready = CF_READY
1772 is_running = CF_RUNNING 3399 is_running = CF_RUNNING
1773 is_new = CF_NEW 3400 is_new = CF_NEW
1774 is_destroyed = CF_DESTROYED 3401 is_destroyed = CF_DESTROYED
3402 is_suspended = CF_SUSPENDED
1775 CODE: 3403 CODE:
1776 RETVAL = boolSV (coro->flags & ix); 3404 RETVAL = boolSV (coro->flags & ix);
1777 OUTPUT: 3405 OUTPUT:
1778 RETVAL 3406 RETVAL
1779 3407
1780void 3408void
3409throw (Coro::State self, SV *exception = &PL_sv_undef)
3410 PROTOTYPE: $;$
3411 CODE:
3412{
3413 struct coro *current = SvSTATE_current;
3414 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
3415 SvREFCNT_dec (*exceptionp);
3416 SvGETMAGIC (exception);
3417 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3418}
3419
3420void
1781api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3421api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3422 PROTOTYPE: $;$
3423 C_ARGS: aTHX_ coro, flags
1782 3424
1783SV * 3425SV *
1784has_stack (Coro::State coro) 3426has_cctx (Coro::State coro)
1785 PROTOTYPE: $ 3427 PROTOTYPE: $
1786 CODE: 3428 CODE:
1787 RETVAL = boolSV (!!coro->cctx); 3429 /* maybe manage the running flag differently */
3430 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1788 OUTPUT: 3431 OUTPUT:
1789 RETVAL 3432 RETVAL
1790 3433
1791int 3434int
1792is_traced (Coro::State coro) 3435is_traced (Coro::State coro)
… …
1794 CODE: 3437 CODE:
1795 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3438 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1796 OUTPUT: 3439 OUTPUT:
1797 RETVAL 3440 RETVAL
1798 3441
1799IV 3442UV
1800rss (Coro::State coro) 3443rss (Coro::State coro)
1801 PROTOTYPE: $ 3444 PROTOTYPE: $
1802 ALIAS: 3445 ALIAS:
1803 usecount = 1 3446 usecount = 1
1804 CODE: 3447 CODE:
… …
1810 OUTPUT: 3453 OUTPUT:
1811 RETVAL 3454 RETVAL
1812 3455
1813void 3456void
1814force_cctx () 3457force_cctx ()
3458 PROTOTYPE:
1815 CODE: 3459 CODE:
3460 cctx_current->idle_sp = 0;
3461
3462void
3463swap_defsv (Coro::State self)
3464 PROTOTYPE: $
3465 ALIAS:
3466 swap_defav = 1
3467 CODE:
3468 if (!self->slot)
3469 croak ("cannot swap state with coroutine that has no saved state,");
3470 else
3471 {
3472 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3473 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3474
3475 SV *tmp = *src; *src = *dst; *dst = tmp;
3476 }
3477
3478void
3479cancel (Coro::State self)
3480 CODE:
3481 coro_state_destroy (aTHX_ self);
3482
3483SV *
3484enable_times (int enabled = enable_times)
3485 CODE:
3486{
3487 RETVAL = boolSV (enable_times);
3488
3489 if (enabled != enable_times)
3490 {
3491 enable_times = enabled;
3492
3493 coro_times_update ();
3494 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3495 }
3496}
3497 OUTPUT:
3498 RETVAL
3499
3500void
3501times (Coro::State self)
3502 PPCODE:
3503{
1816 struct coro *coro = SvSTATE (coro_current); 3504 struct coro *current = SvSTATE (coro_current);
1817 coro->cctx->idle_sp = 0; 3505
3506 if (expect_false (current == self))
3507 {
3508 coro_times_update ();
3509 coro_times_add (SvSTATE (coro_current));
3510 }
3511
3512 EXTEND (SP, 2);
3513 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3514 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3515
3516 if (expect_false (current == self))
3517 coro_times_sub (SvSTATE (coro_current));
3518}
3519
3520void
3521swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3522 CODE:
3523{
3524 struct coro *current = SvSTATE_current;
3525
3526 if (current == coro)
3527 SWAP_SVS (current);
3528
3529 if (!coro->swap_sv)
3530 coro->swap_sv = newAV ();
3531
3532 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3533 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3534
3535 if (current == coro)
3536 SWAP_SVS (current);
3537}
3538
1818 3539
1819MODULE = Coro::State PACKAGE = Coro 3540MODULE = Coro::State PACKAGE = Coro
1820 3541
1821BOOT: 3542BOOT:
1822{ 3543{
1823 int i;
1824
1825 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE); 3544 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1826 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); 3545 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3546 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3547 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3548 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1827 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE); 3549 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3550 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3551 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3552 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1828 3553
1829 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE); 3554 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1830 SvREADONLY_on (coro_current); 3555 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
1831 3556 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3557 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3558
1832 coro_stash = gv_stashpv ("Coro", TRUE); 3559 coro_stash = gv_stashpv ("Coro", TRUE);
1833 3560
1834 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3561 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1835 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3562 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1836 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3563 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1837 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3564 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1838 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3565 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1839 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3566 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1840
1841 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1842 coro_ready[i] = newAV ();
1843 3567
1844 { 3568 {
1845 SV *sv = perl_get_sv ("Coro::API", TRUE); 3569 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1846 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1847 3570
1848 coroapi.schedule = api_schedule; 3571 coroapi.schedule = api_schedule;
3572 coroapi.schedule_to = api_schedule_to;
1849 coroapi.cede = api_cede; 3573 coroapi.cede = api_cede;
1850 coroapi.cede_notself = api_cede_notself; 3574 coroapi.cede_notself = api_cede_notself;
1851 coroapi.ready = api_ready; 3575 coroapi.ready = api_ready;
1852 coroapi.is_ready = api_is_ready; 3576 coroapi.is_ready = api_is_ready;
1853 coroapi.nready = &coro_nready; 3577 coroapi.nready = coro_nready;
1854 coroapi.current = coro_current; 3578 coroapi.current = coro_current;
1855 3579
1856 GCoroAPI = &coroapi; 3580 /*GCoroAPI = &coroapi;*/
1857 sv_setiv (sv, (IV)&coroapi); 3581 sv_setiv (sv, (IV)&coroapi);
1858 SvREADONLY_on (sv); 3582 SvREADONLY_on (sv);
1859 } 3583 }
1860} 3584}
3585
3586SV *
3587async (...)
3588 PROTOTYPE: &@
3589 CODE:
3590 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3591 api_ready (aTHX_ RETVAL);
3592 OUTPUT:
3593 RETVAL
3594
3595void
3596_destroy (Coro::State coro)
3597 CODE:
3598 /* used by the manager thread */
3599 coro_state_destroy (aTHX_ coro);
3600 coro_call_on_destroy (aTHX_ coro);
3601
3602void
3603terminate (...)
3604 CODE:
3605 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3606
3607void
3608cancel (...)
3609 CODE:
3610 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3611
3612void
3613schedule (...)
3614 CODE:
3615 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3616
3617void
3618schedule_to (...)
3619 CODE:
3620 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3621
3622void
3623cede_to (...)
3624 CODE:
3625 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3626
3627void
3628cede (...)
3629 CODE:
3630 CORO_EXECUTE_SLF_XS (slf_init_cede);
3631
3632void
3633cede_notself (...)
3634 CODE:
3635 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1861 3636
1862void 3637void
1863_set_current (SV *current) 3638_set_current (SV *current)
1864 PROTOTYPE: $ 3639 PROTOTYPE: $
1865 CODE: 3640 CODE:
1866 SvREFCNT_dec (SvRV (coro_current)); 3641 SvREFCNT_dec (SvRV (coro_current));
1867 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3642 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3643
3644void
3645_set_readyhook (SV *hook)
3646 PROTOTYPE: $
3647 CODE:
3648 SvREFCNT_dec (coro_readyhook);
3649 SvGETMAGIC (hook);
3650 if (SvOK (hook))
3651 {
3652 coro_readyhook = newSVsv (hook);
3653 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3654 }
3655 else
3656 {
3657 coro_readyhook = 0;
3658 CORO_READYHOOK = 0;
3659 }
1868 3660
1869int 3661int
1870prio (Coro::State coro, int newprio = 0) 3662prio (Coro::State coro, int newprio = 0)
3663 PROTOTYPE: $;$
1871 ALIAS: 3664 ALIAS:
1872 nice = 1 3665 nice = 1
1873 CODE: 3666 CODE:
1874{ 3667{
1875 RETVAL = coro->prio; 3668 RETVAL = coro->prio;
… …
1877 if (items > 1) 3670 if (items > 1)
1878 { 3671 {
1879 if (ix) 3672 if (ix)
1880 newprio = coro->prio - newprio; 3673 newprio = coro->prio - newprio;
1881 3674
1882 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3675 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1883 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3676 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1884 3677
1885 coro->prio = newprio; 3678 coro->prio = newprio;
1886 } 3679 }
1887} 3680}
1888 OUTPUT: 3681 OUTPUT:
… …
1890 3683
1891SV * 3684SV *
1892ready (SV *self) 3685ready (SV *self)
1893 PROTOTYPE: $ 3686 PROTOTYPE: $
1894 CODE: 3687 CODE:
1895 RETVAL = boolSV (api_ready (self)); 3688 RETVAL = boolSV (api_ready (aTHX_ self));
1896 OUTPUT: 3689 OUTPUT:
1897 RETVAL 3690 RETVAL
1898 3691
1899int 3692int
1900nready (...) 3693nready (...)
… …
1903 RETVAL = coro_nready; 3696 RETVAL = coro_nready;
1904 OUTPUT: 3697 OUTPUT:
1905 RETVAL 3698 RETVAL
1906 3699
1907void 3700void
1908throw (Coro::State self, SV *throw = &PL_sv_undef) 3701suspend (Coro::State self)
1909 PROTOTYPE: $;$ 3702 PROTOTYPE: $
3703 CODE:
3704 self->flags |= CF_SUSPENDED;
3705
3706void
3707resume (Coro::State self)
3708 PROTOTYPE: $
3709 CODE:
3710 self->flags &= ~CF_SUSPENDED;
3711
3712void
3713_pool_handler (...)
3714 CODE:
3715 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3716
3717void
3718async_pool (SV *cv, ...)
3719 PROTOTYPE: &@
3720 PPCODE:
3721{
3722 HV *hv = (HV *)av_pop (av_async_pool);
3723 AV *av = newAV ();
3724 SV *cb = ST (0);
3725 int i;
3726
3727 av_extend (av, items - 2);
3728 for (i = 1; i < items; ++i)
3729 av_push (av, SvREFCNT_inc_NN (ST (i)));
3730
3731 if ((SV *)hv == &PL_sv_undef)
3732 {
3733 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3734 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3735 SvREFCNT_dec (sv);
3736 }
3737
3738 {
3739 struct coro *coro = SvSTATE_hv (hv);
3740
3741 assert (!coro->invoke_cb);
3742 assert (!coro->invoke_av);
3743 coro->invoke_cb = SvREFCNT_inc (cb);
3744 coro->invoke_av = av;
3745 }
3746
3747 api_ready (aTHX_ (SV *)hv);
3748
3749 if (GIMME_V != G_VOID)
3750 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3751 else
3752 SvREFCNT_dec (hv);
3753}
3754
3755SV *
3756rouse_cb ()
3757 PROTOTYPE:
3758 CODE:
3759 RETVAL = coro_new_rouse_cb (aTHX);
3760 OUTPUT:
3761 RETVAL
3762
3763void
3764rouse_wait (...)
3765 PROTOTYPE: ;$
3766 PPCODE:
3767 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3768
3769void
3770on_enter (SV *block)
3771 ALIAS:
3772 on_leave = 1
3773 PROTOTYPE: &
3774 CODE:
3775{
3776 struct coro *coro = SvSTATE_current;
3777 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3778
3779 block = s_get_cv_croak (block);
3780
3781 if (!*avp)
3782 *avp = newAV ();
3783
3784 av_push (*avp, SvREFCNT_inc (block));
3785
3786 if (!ix)
3787 on_enterleave_call (aTHX_ block);
3788
3789 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3790 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3791 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3792}
3793
3794
3795MODULE = Coro::State PACKAGE = PerlIO::cede
3796
3797BOOT:
3798 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3799
3800
3801MODULE = Coro::State PACKAGE = Coro::Semaphore
3802
3803SV *
3804new (SV *klass, SV *count = 0)
3805 CODE:
3806{
3807 int semcnt = 1;
3808
3809 if (count)
3810 {
3811 SvGETMAGIC (count);
3812
3813 if (SvOK (count))
3814 semcnt = SvIV (count);
3815 }
3816
3817 RETVAL = sv_bless (
3818 coro_waitarray_new (aTHX_ semcnt),
3819 GvSTASH (CvGV (cv))
3820 );
3821}
3822 OUTPUT:
3823 RETVAL
3824
3825# helper for Coro::Channel and others
3826SV *
3827_alloc (int count)
3828 CODE:
3829 RETVAL = coro_waitarray_new (aTHX_ count);
3830 OUTPUT:
3831 RETVAL
3832
3833SV *
3834count (SV *self)
3835 CODE:
3836 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3837 OUTPUT:
3838 RETVAL
3839
3840void
3841up (SV *self, int adjust = 1)
3842 ALIAS:
3843 adjust = 1
1910 CODE: 3844 CODE:
1911 SvREFCNT_dec (self->throw); 3845 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
1912 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1913 3846
1914void 3847void
1915swap_defsv (Coro::State self) 3848down (...)
1916 PROTOTYPE: $
1917 ALIAS:
1918 swap_defav = 1
1919 CODE: 3849 CODE:
1920 if (!self->slot) 3850 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
1921 croak ("cannot swap state with coroutine that has no saved state"); 3851
3852void
3853wait (...)
3854 CODE:
3855 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3856
3857void
3858try (SV *self)
3859 PPCODE:
3860{
3861 AV *av = (AV *)SvRV (self);
3862 SV *count_sv = AvARRAY (av)[0];
3863 IV count = SvIVX (count_sv);
3864
3865 if (count > 0)
3866 {
3867 --count;
3868 SvIVX (count_sv) = count;
3869 XSRETURN_YES;
3870 }
3871 else
3872 XSRETURN_NO;
3873}
3874
3875void
3876waiters (SV *self)
3877 PPCODE:
3878{
3879 AV *av = (AV *)SvRV (self);
3880 int wcount = AvFILLp (av) + 1 - 1;
3881
3882 if (GIMME_V == G_SCALAR)
3883 XPUSHs (sv_2mortal (newSViv (wcount)));
1922 else 3884 else
1923 { 3885 {
1924 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv); 3886 int i;
1925 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv; 3887 EXTEND (SP, wcount);
1926 3888 for (i = 1; i <= wcount; ++i)
1927 SV *tmp = *src; *src = *dst; *dst = tmp; 3889 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1928 } 3890 }
3891}
1929 3892
1930# for async_pool speedup 3893MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3894
1931void 3895void
1932_pool_1 (SV *cb) 3896_may_delete (SV *sem, int count, int extra_refs)
3897 PPCODE:
3898{
3899 AV *av = (AV *)SvRV (sem);
3900
3901 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3902 && AvFILLp (av) == 0 /* no waiters, just count */
3903 && SvIV (AvARRAY (av)[0]) == count)
3904 XSRETURN_YES;
3905
3906 XSRETURN_NO;
3907}
3908
3909MODULE = Coro::State PACKAGE = Coro::Signal
3910
3911SV *
3912new (SV *klass)
1933 CODE: 3913 CODE:
1934{ 3914 RETVAL = sv_bless (
1935 struct coro *coro = SvSTATE (coro_current); 3915 coro_waitarray_new (aTHX_ 0),
1936 HV *hv = (HV *)SvRV (coro_current); 3916 GvSTASH (CvGV (cv))
1937 AV *defav = GvAV (PL_defgv); 3917 );
1938 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0); 3918 OUTPUT:
1939 AV *invoke_av; 3919 RETVAL
1940 int i, len;
1941
1942 if (!invoke)
1943 {
1944 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
1945 croak ("\3async_pool terminate\2\n");
1946 }
1947
1948 SvREFCNT_dec (coro->saved_deffh);
1949 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
1950
1951 hv_store (hv, "desc", sizeof ("desc") - 1,
1952 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1953
1954 invoke_av = (AV *)SvRV (invoke);
1955 len = av_len (invoke_av);
1956
1957 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1958
1959 if (len > 0)
1960 {
1961 av_fill (defav, len - 1);
1962 for (i = 0; i < len; ++i)
1963 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
1964 }
1965
1966 SvREFCNT_dec (invoke);
1967}
1968 3920
1969void 3921void
1970_pool_2 (SV *cb) 3922wait (...)
3923 CODE:
3924 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3925
3926void
3927broadcast (SV *self)
3928 CODE:
3929{
3930 AV *av = (AV *)SvRV (self);
3931 coro_signal_wake (aTHX_ av, AvFILLp (av));
3932}
3933
3934void
3935send (SV *self)
3936 CODE:
3937{
3938 AV *av = (AV *)SvRV (self);
3939
3940 if (AvFILLp (av))
3941 coro_signal_wake (aTHX_ av, 1);
3942 else
3943 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3944}
3945
3946IV
3947awaited (SV *self)
1971 CODE: 3948 CODE:
1972{ 3949 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
1973 struct coro *coro = SvSTATE (coro_current);
1974
1975 sv_setsv (cb, &PL_sv_undef);
1976
1977 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1978 coro->saved_deffh = 0;
1979
1980 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1981 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1982 {
1983 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
1984 croak ("\3async_pool terminate\2\n");
1985 }
1986
1987 av_clear (GvAV (PL_defgv));
1988 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1989 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1990
1991 coro->prio = 0;
1992
1993 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1994 api_trace (coro_current, 0);
1995
1996 av_push (av_async_pool, newSVsv (coro_current));
1997}
1998
1999
2000MODULE = Coro::State PACKAGE = Coro::AIO
2001
2002SV *
2003_get_state ()
2004 CODE:
2005{
2006 struct io_state *data;
2007
2008 RETVAL = newSV (sizeof (struct io_state));
2009 data = (struct io_state *)SvPVX (RETVAL);
2010 SvCUR_set (RETVAL, sizeof (struct io_state));
2011 SvPOK_only (RETVAL);
2012
2013 data->errorno = errno;
2014 data->laststype = PL_laststype;
2015 data->laststatval = PL_laststatval;
2016 data->statcache = PL_statcache;
2017}
2018 OUTPUT: 3950 OUTPUT:
2019 RETVAL 3951 RETVAL
2020 3952
3953
3954MODULE = Coro::State PACKAGE = Coro::AnyEvent
3955
3956BOOT:
3957 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3958
2021void 3959void
2022_set_state (char *data_) 3960_schedule (...)
2023 PROTOTYPE: $
2024 CODE: 3961 CODE:
2025{ 3962{
2026 struct io_state *data = (void *)data_; 3963 static int incede;
2027 3964
2028 errno = data->errorno; 3965 api_cede_notself (aTHX);
2029 PL_laststype = data->laststype;
2030 PL_laststatval = data->laststatval;
2031 PL_statcache = data->statcache;
2032}
2033 3966
3967 ++incede;
3968 while (coro_nready >= incede && api_cede (aTHX))
3969 ;
3970
3971 sv_setsv (sv_activity, &PL_sv_undef);
3972 if (coro_nready >= incede)
3973 {
3974 PUSHMARK (SP);
3975 PUTBACK;
3976 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3977 }
3978
3979 --incede;
3980}
3981
3982
3983MODULE = Coro::State PACKAGE = Coro::AIO
3984
3985void
3986_register (char *target, char *proto, SV *req)
3987 CODE:
3988{
3989 SV *req_cv = s_get_cv_croak (req);
3990 /* newXSproto doesn't return the CV on 5.8 */
3991 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3992 sv_setpv ((SV *)slf_cv, proto);
3993 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3994}
3995
3996MODULE = Coro::State PACKAGE = Coro::Select
3997
3998void
3999patch_pp_sselect ()
4000 CODE:
4001 if (!coro_old_pp_sselect)
4002 {
4003 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4004 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4005 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4006 }
4007
4008void
4009unpatch_pp_sselect ()
4010 CODE:
4011 if (coro_old_pp_sselect)
4012 {
4013 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4014 coro_old_pp_sselect = 0;
4015 }
4016

Diff Legend

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