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Comparing Coro/Coro/State.xs (file contents):
Revision 1.72 by root, Wed Feb 1 23:59:41 2006 UTC vs.
Revision 1.396 by root, Fri May 6 18:01:13 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
6#include "libcoro/coro.c"
7
1#define PERL_NO_GET_CONTEXT 8#define PERL_NO_GET_CONTEXT
2 9#define PERL_EXT
3#include "libcoro/coro.c"
4 10
5#include "EXTERN.h" 11#include "EXTERN.h"
6#include "perl.h" 12#include "perl.h"
7#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
8 15
9#include "patchlevel.h" 16#include "schmorp.h"
10 17
11#if PERL_VERSION < 6 18#include <stdio.h>
12# ifndef PL_ppaddr 19#include <errno.h>
13# define PL_ppaddr ppaddr 20#include <assert.h>
14# endif 21
15# ifndef call_sv
16# define call_sv perl_call_sv
17# endif
18# ifndef get_sv
19# define get_sv perl_get_sv
20# endif
21# ifndef get_cv
22# define get_cv perl_get_cv
23# endif
24# ifndef IS_PADGV
25# define IS_PADGV(v) 0
26# endif
27# ifndef IS_PADCONST 22#ifndef SVs_PADSTALE
28# define IS_PADCONST(v) 0 23# define SVs_PADSTALE 0
29# endif
30#endif 24#endif
31 25
32#include <errno.h> 26#if defined(_WIN32)
33#include <signal.h> 27# undef HAS_GETTIMEOFDAY
28# undef setjmp
29# undef longjmp
30# undef _exit
31# define setjmp _setjmp /* deep magic */
32#else
33# include <inttypes.h> /* most portable stdint.h */
34#endif
34 35
35#ifdef HAVE_MMAP 36#ifdef HAVE_MMAP
36# include <unistd.h> 37# include <unistd.h>
37# include <sys/mman.h> 38# include <sys/mman.h>
38# ifndef MAP_ANONYMOUS 39# ifndef MAP_ANONYMOUS
… …
40# define MAP_ANONYMOUS MAP_ANON 41# define MAP_ANONYMOUS MAP_ANON
41# else 42# else
42# undef HAVE_MMAP 43# undef HAVE_MMAP
43# endif 44# endif
44# endif 45# endif
46# include <limits.h>
47# ifndef PAGESIZE
48# define PAGESIZE pagesize
49# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
50static long pagesize;
51# else
52# define BOOT_PAGESIZE (void)0
53# endif
54#else
55# define PAGESIZE 0
56# define BOOT_PAGESIZE (void)0
45#endif 57#endif
46 58
47#define SUB_INIT "Coro::State::initialize" 59#if CORO_USE_VALGRIND
48#define UCORO_STATE "_coro_state" 60# include <valgrind/valgrind.h>
61#endif
49 62
50/* The next macro should declare a variable stacklevel that contains and approximation 63/* the maximum number of idle cctx that will be pooled */
51 * to the current C stack pointer. Its property is that it changes with each call 64static int cctx_max_idle = 4;
52 * and should be unique. */ 65
66#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
67# undef CORO_STACKGUARD
68#endif
69
70#ifndef CORO_STACKGUARD
71# define CORO_STACKGUARD 0
72#endif
73
74/* prefer perl internal functions over our own? */
75#ifndef CORO_PREFER_PERL_FUNCTIONS
76# define CORO_PREFER_PERL_FUNCTIONS 0
77#endif
78
79/* The next macros try to return the current stack pointer, in an as
80 * portable way as possible. */
81#if __GNUC__ >= 4
82# define dSTACKLEVEL int stacklevel_dummy
83# define STACKLEVEL __builtin_frame_address (0)
84#else
85# define dSTACKLEVEL volatile void *stacklevel
53#define dSTACKLEVEL void *stacklevel = &stacklevel 86# define STACKLEVEL ((void *)&stacklevel)
87#endif
54 88
55#define IN_DESTRUCT (PL_main_cv == Nullcv) 89#define IN_DESTRUCT PL_dirty
56 90
57#define labs(l) ((l) >= 0 ? (l) : -(l)) 91#if __GNUC__ >= 3
92# define attribute(x) __attribute__(x)
93# define expect(expr,value) __builtin_expect ((expr), (value))
94# define INLINE static inline
95#else
96# define attribute(x)
97# define expect(expr,value) (expr)
98# define INLINE static
99#endif
100
101#define expect_false(expr) expect ((expr) != 0, 0)
102#define expect_true(expr) expect ((expr) != 0, 1)
103
104#define NOINLINE attribute ((noinline))
58 105
59#include "CoroAPI.h" 106#include "CoroAPI.h"
107#define GCoroAPI (&coroapi) /* very sneaky */
60 108
61#ifdef USE_ITHREADS 109#ifdef USE_ITHREADS
62static perl_mutex coro_mutex; 110# if CORO_PTHREAD
63# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 111static void *coro_thx;
64# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 112# endif
65#else
66# define LOCK (void)0
67# define UNLOCK (void)0
68#endif 113#endif
69 114
115#ifdef __linux
116# include <time.h> /* for timespec */
117# include <syscall.h> /* for SYS_* */
118# ifdef SYS_clock_gettime
119# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
120# define CORO_CLOCK_MONOTONIC 1
121# define CORO_CLOCK_THREAD_CPUTIME_ID 3
122# endif
123#endif
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;
133static size_t cctx_stacksize = CORO_STACKSIZE;
70static struct CoroAPI coroapi; 134static struct CoroAPI coroapi;
71static AV *main_mainstack; /* used to differentiate between $main and others */ 135static AV *main_mainstack; /* used to differentiate between $main and others */
136static JMPENV *main_top_env;
72static HV *coro_state_stash; 137static HV *coro_state_stash, *coro_stash;
73static SV *ucoro_state_sv;
74static U32 ucoro_state_hash;
75static SV *coro_mortal; /* will be freed after next transfer */ 138static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
76 139
77/* this is actually not only the c stack but also c registers etc... */ 140static AV *av_destroy; /* destruction queue */
141static SV *sv_manager; /* the manager coro */
142static SV *sv_idle; /* $Coro::idle */
143
144static GV *irsgv; /* $/ */
145static GV *stdoutgv; /* *STDOUT */
146static SV *rv_diehook;
147static SV *rv_warnhook;
148static HV *hv_sig; /* %SIG */
149
150/* async_pool helper stuff */
151static SV *sv_pool_rss;
152static SV *sv_pool_size;
153static SV *sv_async_pool_idle; /* description string */
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;
166
167static struct coro_cctx *cctx_first;
168static int cctx_count, cctx_idle;
169
170enum {
171 CC_MAPPED = 0x01,
172 CC_NOREUSE = 0x02, /* throw this away after tracing */
173 CC_TRACE = 0x04,
174 CC_TRACE_SUB = 0x08, /* trace sub calls */
175 CC_TRACE_LINE = 0x10, /* trace each statement */
176 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
177};
178
179/* this is a structure representing a c-level coroutine */
78typedef struct { 180typedef struct coro_cctx
79 int refcnt; /* pointer reference counter */ 181{
80 int usecnt; /* shared by how many coroutines */ 182 struct coro_cctx *next;
81 int gencnt; /* generation counter */
82 183
184 /* the stack */
185 void *sptr;
186 size_t ssize;
187
188 /* cpu state */
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 */
191 JMPENV *top_env;
83 coro_context cctx; 192 coro_context cctx;
84 193
85 void *sptr; 194 U32 gen;
86 long ssize; /* positive == mmap, otherwise malloc */ 195#if CORO_USE_VALGRIND
87} coro_stack; 196 int valgrind_id;
197#endif
198 unsigned char flags;
199} coro_cctx;
88 200
201static coro_cctx *cctx_current; /* the currently running cctx */
202
203/*****************************************************************************/
204
205enum {
206 CF_RUNNING = 0x0001, /* coroutine is running */
207 CF_READY = 0x0002, /* coroutine is ready */
208 CF_NEW = 0x0004, /* has never been switched to */
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) */
212};
213
214/* the structure where most of the perl state is stored, overlaid on the cxstack */
215typedef struct
216{
217 SV *defsv;
218 AV *defav;
219 SV *errsv;
220 SV *irsgv;
221 HV *hinthv;
222#define VAR(name,type) type name;
223# include "state.h"
224#undef VAR
225} perl_slots;
226
227#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
228
229/* this is a structure representing a perl-level coroutine */
89struct coro { 230struct coro {
90 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 231 /* the C coroutine allocated to this perl coroutine, if any */
91 JMPENV start_env; 232 coro_cctx *cctx;
92 233
93 /* the optional C context */ 234 /* ready queue */
94 coro_stack *stack; 235 struct coro *next_ready;
95 void *cursp;
96 int gencnt;
97 236
98 /* optionally saved, might be zero */ 237 /* state data */
99 AV *defav; 238 struct CoroSLF slf_frame; /* saved slf frame */
100 SV *defsv;
101 SV *errsv;
102
103 /* saved global state not related to stacks */
104 U8 dowarn;
105 I32 in_eval;
106
107 /* the stacks and related info (callchain etc..) */
108 PERL_SI *curstackinfo;
109 AV *curstack;
110 AV *mainstack; 239 AV *mainstack;
111 SV **stack_sp; 240 perl_slots *slot; /* basically the saved sp */
112 OP *op;
113 SV **curpad;
114 AV *comppad;
115 CV *compcv;
116 SV **stack_base;
117 SV **stack_max;
118 SV **tmps_stack;
119 I32 tmps_floor;
120 I32 tmps_ix;
121 I32 tmps_max;
122 I32 *markstack;
123 I32 *markstack_ptr;
124 I32 *markstack_max;
125 I32 *scopestack;
126 I32 scopestack_ix;
127 I32 scopestack_max;
128 ANY *savestack;
129 I32 savestack_ix;
130 I32 savestack_max;
131 OP **retstack;
132 I32 retstack_ix;
133 I32 retstack_max;
134 PMOP *curpm;
135 COP *curcop;
136 JMPENV *top_env;
137 241
242 CV *startcv; /* the CV to execute */
138 /* data associated with this coroutine (initial args) */ 243 AV *args; /* data associated with this coroutine (initial args) */
139 AV *args; 244 int refcnt; /* coroutines are refcounted, yes */
245 int flags; /* CF_ flags */
246 HV *hv; /* the perl hash associated with this coro, if any */
247 void (*on_destroy)(pTHX_ struct coro *coro); /* for temporary use by xs in critical sections */
248
249 /* statistics */
250 int usecount; /* number of transfers to this coro */
251
252 /* coro process data */
253 int prio;
254 SV *except; /* exception to be thrown */
255 SV *rouse_cb;
256
257 /* async_pool */
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;
271
272 /* linked list */
273 struct coro *next, *prev;
140}; 274};
141 275
142typedef struct coro *Coro__State; 276typedef struct coro *Coro__State;
143typedef struct coro *Coro__State_or_hashref; 277typedef struct coro *Coro__State_or_hashref;
144 278
145/* mostly copied from op.c:cv_clone2 */ 279/* the following variables are effectively part of the perl context */
146STATIC AV * 280/* and get copied between struct coro and these variables */
147clone_padlist (pTHX_ AV *protopadlist) 281/* the main reason we don't support windows process emulation */
282static struct CoroSLF slf_frame; /* the current slf frame */
283
284/** Coro ********************************************************************/
285
286#define CORO_PRIO_MAX 3
287#define CORO_PRIO_HIGH 1
288#define CORO_PRIO_NORMAL 0
289#define CORO_PRIO_LOW -1
290#define CORO_PRIO_IDLE -3
291#define CORO_PRIO_MIN -4
292
293/* for Coro.pm */
294static SV *coro_current;
295static SV *coro_readyhook;
296static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
297static CV *cv_coro_run, *cv_coro_terminate;
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)
148{ 309{
149 AV *av; 310 dSP;
150 I32 ix; 311 PUSHMARK (SP - 4); /* fake argument list */
151 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 312 XPUSHs (coro_select_select);
152 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 313 PUTBACK;
153 SV **pname = AvARRAY (protopad_name); 314
154 SV **ppad = AvARRAY (protopad); 315 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
155 I32 fname = AvFILLp (protopad_name); 316 PL_op->op_flags |= OPf_STACKED;
156 I32 fpad = AvFILLp (protopad); 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
372
373/** lowlevel stuff **********************************************************/
374
375static SV *
376coro_get_sv (pTHX_ const char *name, int create)
377{
378#if PERL_VERSION_ATLEAST (5,10,0)
379 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
380 get_sv (name, create);
381#endif
382 return get_sv (name, create);
383}
384
385static AV *
386coro_get_av (pTHX_ const char *name, int create)
387{
388#if PERL_VERSION_ATLEAST (5,10,0)
389 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
390 get_av (name, create);
391#endif
392 return get_av (name, create);
393}
394
395static HV *
396coro_get_hv (pTHX_ const char *name, int create)
397{
398#if PERL_VERSION_ATLEAST (5,10,0)
399 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
400 get_hv (name, create);
401#endif
402 return get_hv (name, create);
403}
404
405INLINE void
406coro_times_update ()
407{
408#ifdef coro_clock_gettime
409 struct timespec ts;
410
411 ts.tv_sec = ts.tv_nsec = 0;
412 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
413 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
414
415 ts.tv_sec = ts.tv_nsec = 0;
416 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
417 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
418#else
419 dTHX;
420 UV tv[2];
421
422 u2time (aTHX_ tv);
423 time_real [0] = tv [0];
424 time_real [1] = tv [1] * 1000;
425#endif
426}
427
428INLINE void
429coro_times_add (struct coro *c)
430{
431 c->t_real [1] += time_real [1];
432 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
433 c->t_real [0] += time_real [0];
434
435 c->t_cpu [1] += time_cpu [1];
436 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
437 c->t_cpu [0] += time_cpu [0];
438}
439
440INLINE void
441coro_times_sub (struct coro *c)
442{
443 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
444 c->t_real [1] -= time_real [1];
445 c->t_real [0] -= time_real [0];
446
447 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
448 c->t_cpu [1] -= time_cpu [1];
449 c->t_cpu [0] -= time_cpu [0];
450}
451
452/*****************************************************************************/
453/* magic glue */
454
455#define CORO_MAGIC_type_cv 26
456#define CORO_MAGIC_type_state PERL_MAGIC_ext
457
458#define CORO_MAGIC_NN(sv, type) \
459 (expect_true (SvMAGIC (sv)->mg_type == type) \
460 ? SvMAGIC (sv) \
461 : mg_find (sv, type))
462
463#define CORO_MAGIC(sv, type) \
464 (expect_true (SvMAGIC (sv)) \
465 ? CORO_MAGIC_NN (sv, type) \
466 : 0)
467
468#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
469#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
470
471INLINE struct coro *
472SvSTATE_ (pTHX_ SV *coro)
473{
474 HV *stash;
475 MAGIC *mg;
476
477 if (SvROK (coro))
478 coro = SvRV (coro);
479
480 if (expect_false (SvTYPE (coro) != SVt_PVHV))
481 croak ("Coro::State object required");
482
483 stash = SvSTASH (coro);
484 if (expect_false (stash != coro_stash && stash != coro_state_stash))
485 {
486 /* very slow, but rare, check */
487 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
488 croak ("Coro::State object required");
489 }
490
491 mg = CORO_MAGIC_state (coro);
492 return (struct coro *)mg->mg_ptr;
493}
494
495#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
496
497/* faster than SvSTATE, but expects a coroutine hv */
498#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
499#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
500
501/*****************************************************************************/
502/* padlist management and caching */
503
504static AV *
505coro_derive_padlist (pTHX_ CV *cv)
506{
507 AV *padlist = CvPADLIST (cv);
157 AV *newpadlist, *newpad_name, *newpad; 508 AV *newpadlist, *newpad;
158 SV **npad;
159
160 newpad_name = newAV ();
161 for (ix = fname; ix >= 0; ix--)
162 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
163
164 newpad = newAV ();
165 av_fill (newpad, AvFILLp (protopad));
166 npad = AvARRAY (newpad);
167 509
168 newpadlist = newAV (); 510 newpadlist = newAV ();
169 AvREAL_off (newpadlist); 511 AvREAL_off (newpadlist);
170 av_store (newpadlist, 0, (SV *) newpad_name); 512#if PERL_VERSION_ATLEAST (5,10,0)
513 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
514#else
515 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
516#endif
517 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
518 --AvFILLp (padlist);
519
520 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
171 av_store (newpadlist, 1, (SV *) newpad); 521 av_store (newpadlist, 1, (SV *)newpad);
172 522
173 av = newAV (); /* will be @_ */ 523 return newpadlist;
174 av_extend (av, 0); 524}
175 av_store (newpad, 0, (SV *) av);
176 AvREIFY_on (av);
177 525
178 for (ix = fpad; ix > 0; ix--) 526static void
527free_padlist (pTHX_ AV *padlist)
528{
529 /* may be during global destruction */
530 if (!IN_DESTRUCT)
179 { 531 {
180 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 532 I32 i = AvFILLp (padlist);
181 533
182 if (namesv && namesv != &PL_sv_undef) 534 while (i > 0) /* special-case index 0 */
183 { 535 {
184 char *name = SvPVX (namesv); /* XXX */ 536 /* we try to be extra-careful here */
537 AV *av = (AV *)AvARRAY (padlist)[i--];
538 I32 j = AvFILLp (av);
185 539
186 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 540 while (j >= 0)
187 { /* lexical from outside? */ 541 SvREFCNT_dec (AvARRAY (av)[j--]);
188 npad[ix] = SvREFCNT_inc (ppad[ix]);
189 }
190 else
191 { /* our own lexical */
192 SV *sv;
193 if (*name == '&')
194 sv = SvREFCNT_inc (ppad[ix]);
195 else if (*name == '@')
196 sv = (SV *) newAV ();
197 else if (*name == '%')
198 sv = (SV *) newHV ();
199 else
200 sv = NEWSV (0, 0);
201 542
202#ifdef SvPADBUSY 543 AvFILLp (av) = -1;
203 if (!SvPADBUSY (sv)) 544 SvREFCNT_dec (av);
204#endif
205 SvPADMY_on (sv);
206
207 npad[ix] = sv;
208 }
209 } 545 }
210 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
211 {
212 npad[ix] = SvREFCNT_inc (ppad[ix]);
213 }
214 else
215 {
216 SV *sv = NEWSV (0, 0);
217 SvPADTMP_on (sv);
218 npad[ix] = sv;
219 }
220 }
221 546
222#if 0 /* return -ENOTUNDERSTOOD */ 547 SvREFCNT_dec (AvARRAY (padlist)[0]);
223 /* Now that vars are all in place, clone nested closures. */
224 548
225 for (ix = fpad; ix > 0; ix--) {
226 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
227 if (namesv
228 && namesv != &PL_sv_undef
229 && !(SvFLAGS(namesv) & SVf_FAKE)
230 && *SvPVX(namesv) == '&'
231 && CvCLONE(ppad[ix]))
232 {
233 CV *kid = cv_clone((CV*)ppad[ix]);
234 SvREFCNT_dec(ppad[ix]);
235 CvCLONE_on(kid);
236 SvPADMY_on(kid);
237 npad[ix] = (SV*)kid;
238 }
239 }
240#endif
241
242 return newpadlist;
243}
244
245STATIC void
246free_padlist (pTHX_ AV *padlist)
247{
248 /* may be during global destruction */
249 if (SvREFCNT (padlist))
250 {
251 I32 i = AvFILLp (padlist); 549 AvFILLp (padlist) = -1;
252 while (i >= 0)
253 {
254 SV **svp = av_fetch (padlist, i--, FALSE);
255 if (svp)
256 {
257 SV *sv;
258 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
259 SvREFCNT_dec (sv);
260
261 SvREFCNT_dec (*svp);
262 }
263 }
264
265 SvREFCNT_dec ((SV*)padlist); 550 SvREFCNT_dec ((SV*)padlist);
266 } 551 }
267} 552}
268 553
269STATIC int 554static int
270coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 555coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
271{ 556{
272 AV *padlist; 557 AV *padlist;
273 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;
274 563
275 /* casting is fun. */ 564 /* casting is fun. */
276 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 565 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
277 free_padlist (aTHX_ padlist); 566 free_padlist (aTHX_ padlist);
278 567
279 SvREFCNT_dec (av); 568 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
280}
281 569
282#define PERL_MAGIC_coro PERL_MAGIC_ext 570 return 0;
571}
283 572
284static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 573static MGVTBL coro_cv_vtbl = {
574 0, 0, 0, 0,
575 coro_cv_free
576};
285 577
286/* the next two functions merely cache the padlists */ 578/* the next two functions merely cache the padlists */
287STATIC void 579static void
288get_padlist (pTHX_ CV *cv) 580get_padlist (pTHX_ CV *cv)
289{ 581{
290 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 582 MAGIC *mg = CORO_MAGIC_cv (cv);
583 AV *av;
291 584
292 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 585 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
293 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 586 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
294 else 587 else
588 {
589#if CORO_PREFER_PERL_FUNCTIONS
590 /* this is probably cleaner? but also slower! */
591 /* in practise, it seems to be less stable */
592 CV *cp = Perl_cv_clone (aTHX_ cv);
593 CvPADLIST (cv) = CvPADLIST (cp);
594 CvPADLIST (cp) = 0;
595 SvREFCNT_dec (cp);
596#else
295 CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv)); 597 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
598#endif
599 }
296} 600}
297 601
298STATIC void 602static void
299put_padlist (pTHX_ CV *cv) 603put_padlist (pTHX_ CV *cv)
300{ 604{
301 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 605 MAGIC *mg = CORO_MAGIC_cv (cv);
606 AV *av;
302 607
303 if (!mg) 608 if (expect_false (!mg))
609 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
610
611 av = (AV *)mg->mg_obj;
612
613 if (expect_false (AvFILLp (av) >= AvMAX (av)))
614 av_extend (av, AvFILLp (av) + 1);
615
616 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
617}
618
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 */
304 { 648 {
305 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0); 649 /* swap sv_u */
306 mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 650 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
307 mg->mg_virtual = &vtbl_coro; 651
308 mg->mg_obj = (SV *)newAV (); 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);
309 } 663 }
310 664#endif
311 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 665 }
312} 666}
313 667
314#define SB do { 668#define SWAP_SVS(coro) \
315#define SE } while (0) 669 if (expect_false ((coro)->swap_sv)) \
670 swap_svs (aTHX_ (coro))
316 671
317#define LOAD(state) load_state(aTHX_ (state));
318#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
319
320#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
321
322static void 672static void
673on_enterleave_call (pTHX_ SV *cb);
674
675static void
323load_state(pTHX_ Coro__State c) 676load_perl (pTHX_ Coro__State c)
324{ 677{
325 PL_dowarn = c->dowarn; 678 perl_slots *slot = c->slot;
326 PL_in_eval = c->in_eval; 679 c->slot = 0;
327 680
328 PL_curstackinfo = c->curstackinfo;
329 PL_curstack = c->curstack;
330 PL_mainstack = c->mainstack; 681 PL_mainstack = c->mainstack;
331 PL_stack_sp = c->stack_sp;
332 PL_op = c->op;
333 PL_curpad = c->curpad;
334 PL_comppad = c->comppad;
335 PL_compcv = c->compcv;
336 PL_stack_base = c->stack_base;
337 PL_stack_max = c->stack_max;
338 PL_tmps_stack = c->tmps_stack;
339 PL_tmps_floor = c->tmps_floor;
340 PL_tmps_ix = c->tmps_ix;
341 PL_tmps_max = c->tmps_max;
342 PL_markstack = c->markstack;
343 PL_markstack_ptr = c->markstack_ptr;
344 PL_markstack_max = c->markstack_max;
345 PL_scopestack = c->scopestack;
346 PL_scopestack_ix = c->scopestack_ix;
347 PL_scopestack_max = c->scopestack_max;
348 PL_savestack = c->savestack;
349 PL_savestack_ix = c->savestack_ix;
350 PL_savestack_max = c->savestack_max;
351#if PERL_VERSION < 9
352 PL_retstack = c->retstack;
353 PL_retstack_ix = c->retstack_ix;
354 PL_retstack_max = c->retstack_max;
355#endif
356 PL_curpm = c->curpm;
357 PL_curcop = c->curcop;
358 PL_top_env = c->top_env;
359 682
360 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 683 GvSV (PL_defgv) = slot->defsv;
361 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 684 GvAV (PL_defgv) = slot->defav;
362 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 685 GvSV (PL_errgv) = slot->errsv;
686 GvSV (irsgv) = slot->irsgv;
687 GvHV (PL_hintgv) = slot->hinthv;
688
689 #define VAR(name,type) PL_ ## name = slot->name;
690 # include "state.h"
691 #undef VAR
363 692
364 { 693 {
365 dSP; 694 dSP;
695
366 CV *cv; 696 CV *cv;
367 697
368 /* now do the ugly restore mess */ 698 /* now do the ugly restore mess */
369 while ((cv = (CV *)POPs)) 699 while (expect_true (cv = (CV *)POPs))
370 { 700 {
371 AV *padlist = (AV *)POPs;
372
373 if (padlist)
374 {
375 put_padlist (aTHX_ cv); /* mark this padlist as available */ 701 put_padlist (aTHX_ cv); /* mark this padlist as available */
376 CvPADLIST(cv) = padlist; 702 CvDEPTH (cv) = PTR2IV (POPs);
377 } 703 CvPADLIST (cv) = (AV *)POPs;
378
379 ++CvDEPTH(cv);
380 } 704 }
381 705
382 PUTBACK; 706 PUTBACK;
383 } 707 }
384}
385 708
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);
729}
730
386static void 731static void
387save_state(pTHX_ Coro__State c, int flags) 732save_perl (pTHX_ Coro__State c)
388{ 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
389 { 755 {
390 dSP; 756 dSP;
391 I32 cxix = cxstack_ix; 757 I32 cxix = cxstack_ix;
392 PERL_CONTEXT *ccstk = cxstack; 758 PERL_CONTEXT *ccstk = cxstack;
393 PERL_SI *top_si = PL_curstackinfo; 759 PERL_SI *top_si = PL_curstackinfo;
… …
395 /* 761 /*
396 * the worst thing you can imagine happens first - we have to save 762 * the worst thing you can imagine happens first - we have to save
397 * (and reinitialize) all cv's in the whole callchain :( 763 * (and reinitialize) all cv's in the whole callchain :(
398 */ 764 */
399 765
400 PUSHs (Nullsv); 766 XPUSHs (Nullsv);
401 /* this loop was inspired by pp_caller */ 767 /* this loop was inspired by pp_caller */
402 for (;;) 768 for (;;)
403 { 769 {
404 while (cxix >= 0) 770 while (expect_true (cxix >= 0))
405 { 771 {
406 PERL_CONTEXT *cx = &ccstk[cxix--]; 772 PERL_CONTEXT *cx = &ccstk[cxix--];
407 773
408 if (CxTYPE(cx) == CXt_SUB) 774 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
409 { 775 {
410 CV *cv = cx->blk_sub.cv; 776 CV *cv = cx->blk_sub.cv;
777
411 if (CvDEPTH(cv)) 778 if (expect_true (CvDEPTH (cv)))
412 { 779 {
413 EXTEND (SP, CvDEPTH(cv)*2); 780 EXTEND (SP, 3);
414
415 while (--CvDEPTH(cv))
416 {
417 /* this tells the restore code to increment CvDEPTH */
418 PUSHs (Nullsv);
419 PUSHs ((SV *)cv);
420 }
421
422 PUSHs ((SV *)CvPADLIST(cv)); 781 PUSHs ((SV *)CvPADLIST (cv));
782 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
423 PUSHs ((SV *)cv); 783 PUSHs ((SV *)cv);
424 784
785 CvDEPTH (cv) = 0;
425 get_padlist (aTHX_ cv); /* this is a monster */ 786 get_padlist (aTHX_ cv);
426 } 787 }
427 } 788 }
428#ifdef CXt_FORMAT
429 else if (CxTYPE(cx) == CXt_FORMAT)
430 {
431 /* I never used formats, so how should I know how these are implemented? */
432 /* my bold guess is as a simple, plain sub... */
433 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
434 }
435#endif
436 } 789 }
437 790
438 if (top_si->si_type == PERLSI_MAIN) 791 if (expect_true (top_si->si_type == PERLSI_MAIN))
439 break; 792 break;
440 793
441 top_si = top_si->si_prev; 794 top_si = top_si->si_prev;
442 ccstk = top_si->si_cxstack; 795 ccstk = top_si->si_cxstack;
443 cxix = top_si->si_cxix; 796 cxix = top_si->si_cxix;
444 } 797 }
445 798
446 PUTBACK; 799 PUTBACK;
447 } 800 }
448 801
449 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 802 /* allocate some space on the context stack for our purposes */
450 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 803 /* we manually unroll here, as usually 2 slots is enough */
451 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 804 if (SLOT_COUNT >= 1) CXINC;
805 if (SLOT_COUNT >= 2) CXINC;
806 if (SLOT_COUNT >= 3) CXINC;
807 {
808 unsigned int i;
809 for (i = 3; i < SLOT_COUNT; ++i)
810 CXINC;
811 }
812 cxstack_ix -= SLOT_COUNT; /* undo allocation */
452 813
453 c->dowarn = PL_dowarn;
454 c->in_eval = PL_in_eval;
455
456 c->curstackinfo = PL_curstackinfo;
457 c->curstack = PL_curstack;
458 c->mainstack = PL_mainstack; 814 c->mainstack = PL_mainstack;
459 c->stack_sp = PL_stack_sp; 815
460 c->op = PL_op; 816 {
461 c->curpad = PL_curpad; 817 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
462 c->comppad = PL_comppad; 818
463 c->compcv = PL_compcv; 819 slot->defav = GvAV (PL_defgv);
464 c->stack_base = PL_stack_base; 820 slot->defsv = DEFSV;
465 c->stack_max = PL_stack_max; 821 slot->errsv = ERRSV;
466 c->tmps_stack = PL_tmps_stack; 822 slot->irsgv = GvSV (irsgv);
467 c->tmps_floor = PL_tmps_floor; 823 slot->hinthv = GvHV (PL_hintgv);
468 c->tmps_ix = PL_tmps_ix; 824
469 c->tmps_max = PL_tmps_max; 825 #define VAR(name,type) slot->name = PL_ ## name;
470 c->markstack = PL_markstack; 826 # include "state.h"
471 c->markstack_ptr = PL_markstack_ptr; 827 #undef VAR
472 c->markstack_max = PL_markstack_max; 828 }
473 c->scopestack = PL_scopestack;
474 c->scopestack_ix = PL_scopestack_ix;
475 c->scopestack_max = PL_scopestack_max;
476 c->savestack = PL_savestack;
477 c->savestack_ix = PL_savestack_ix;
478 c->savestack_max = PL_savestack_max;
479#if PERL_VERSION < 9
480 c->retstack = PL_retstack;
481 c->retstack_ix = PL_retstack_ix;
482 c->retstack_max = PL_retstack_max;
483#endif
484 c->curpm = PL_curpm;
485 c->curcop = PL_curcop;
486 c->top_env = PL_top_env;
487} 829}
488 830
489/* 831/*
490 * allocate various perl stacks. This is an exact copy 832 * allocate various perl stacks. This is almost an exact copy
491 * of perl.c:init_stacks, except that it uses less memory 833 * of perl.c:init_stacks, except that it uses less memory
492 * on the (sometimes correct) assumption that coroutines do 834 * on the (sometimes correct) assumption that coroutines do
493 * not usually need a lot of stackspace. 835 * not usually need a lot of stackspace.
494 */ 836 */
495STATIC void 837#if CORO_PREFER_PERL_FUNCTIONS
838# define coro_init_stacks(thx) init_stacks ()
839#else
840static void
496coro_init_stacks (pTHX) 841coro_init_stacks (pTHX)
497{ 842{
498 LOCK; 843 PL_curstackinfo = new_stackinfo(32, 8);
499
500 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
501 PL_curstackinfo->si_type = PERLSI_MAIN; 844 PL_curstackinfo->si_type = PERLSI_MAIN;
502 PL_curstack = PL_curstackinfo->si_stack; 845 PL_curstack = PL_curstackinfo->si_stack;
503 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 846 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
504 847
505 PL_stack_base = AvARRAY(PL_curstack); 848 PL_stack_base = AvARRAY(PL_curstack);
506 PL_stack_sp = PL_stack_base; 849 PL_stack_sp = PL_stack_base;
507 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 850 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
508 851
509 New(50,PL_tmps_stack,96,SV*); 852 New(50,PL_tmps_stack,32,SV*);
510 PL_tmps_floor = -1; 853 PL_tmps_floor = -1;
511 PL_tmps_ix = -1; 854 PL_tmps_ix = -1;
512 PL_tmps_max = 96; 855 PL_tmps_max = 32;
513 856
514 New(54,PL_markstack,16,I32); 857 New(54,PL_markstack,16,I32);
515 PL_markstack_ptr = PL_markstack; 858 PL_markstack_ptr = PL_markstack;
516 PL_markstack_max = PL_markstack + 16; 859 PL_markstack_max = PL_markstack + 16;
517 860
518#ifdef SET_MARK_OFFSET 861#ifdef SET_MARK_OFFSET
519 SET_MARK_OFFSET; 862 SET_MARK_OFFSET;
520#endif 863#endif
521 864
522 New(54,PL_scopestack,16,I32); 865 New(54,PL_scopestack,8,I32);
523 PL_scopestack_ix = 0; 866 PL_scopestack_ix = 0;
524 PL_scopestack_max = 16; 867 PL_scopestack_max = 8;
525 868
526 New(54,PL_savestack,96,ANY); 869 New(54,PL_savestack,24,ANY);
527 PL_savestack_ix = 0; 870 PL_savestack_ix = 0;
528 PL_savestack_max = 96; 871 PL_savestack_max = 24;
529 872
530#if PERL_VERSION < 9 873#if !PERL_VERSION_ATLEAST (5,10,0)
531 New(54,PL_retstack,8,OP*); 874 New(54,PL_retstack,4,OP*);
532 PL_retstack_ix = 0; 875 PL_retstack_ix = 0;
533 PL_retstack_max = 8; 876 PL_retstack_max = 4;
534#endif 877#endif
535
536 UNLOCK;
537} 878}
879#endif
538 880
539/* 881/*
540 * destroy the stacks, the callchain etc... 882 * destroy the stacks, the callchain etc...
541 */ 883 */
542STATIC void 884static void
543destroy_stacks(pTHX) 885coro_destruct_stacks (pTHX)
544{ 886{
545 if (!IN_DESTRUCT)
546 {
547 /* is this ugly, I ask? */
548 LEAVE_SCOPE (0);
549
550 /* sure it is, but more important: is it correct?? :/ */
551 FREETMPS;
552
553 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
554 }
555
556 while (PL_curstackinfo->si_next) 887 while (PL_curstackinfo->si_next)
557 PL_curstackinfo = PL_curstackinfo->si_next; 888 PL_curstackinfo = PL_curstackinfo->si_next;
558 889
559 while (PL_curstackinfo) 890 while (PL_curstackinfo)
560 { 891 {
561 PERL_SI *p = PL_curstackinfo->si_prev; 892 PERL_SI *p = PL_curstackinfo->si_prev;
562 893
563 { /*D*//*remove*/
564 dSP;
565 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
566 PUTBACK; /* possibly superfluous */
567 }
568
569 if (!IN_DESTRUCT) 894 if (!IN_DESTRUCT)
570 {
571 dounwind (-1);/*D*//*remove*/
572 SvREFCNT_dec (PL_curstackinfo->si_stack); 895 SvREFCNT_dec (PL_curstackinfo->si_stack);
573 }
574 896
575 Safefree (PL_curstackinfo->si_cxstack); 897 Safefree (PL_curstackinfo->si_cxstack);
576 Safefree (PL_curstackinfo); 898 Safefree (PL_curstackinfo);
577 PL_curstackinfo = p; 899 PL_curstackinfo = p;
578 } 900 }
579 901
580 Safefree (PL_tmps_stack); 902 Safefree (PL_tmps_stack);
581 Safefree (PL_markstack); 903 Safefree (PL_markstack);
582 Safefree (PL_scopestack); 904 Safefree (PL_scopestack);
583 Safefree (PL_savestack); 905 Safefree (PL_savestack);
584#if PERL_VERSION < 9 906#if !PERL_VERSION_ATLEAST (5,10,0)
585 Safefree (PL_retstack); 907 Safefree (PL_retstack);
586#endif 908#endif
587} 909}
588 910
589static void 911#define CORO_RSS \
590allocate_stack (Coro__State ctx, int alloc) 912 rss += sizeof (SYM (curstackinfo)); \
591{ 913 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
592 coro_stack *stack; 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);
593 919
594 New (0, stack, 1, coro_stack); 920static size_t
921coro_rss (pTHX_ struct coro *coro)
922{
923 size_t rss = sizeof (*coro);
595 924
596 stack->refcnt = 1; 925 if (coro->mainstack)
597 stack->usecnt = 1; 926 {
598 stack->gencnt = ctx->gencnt = 0; 927 if (coro->flags & CF_RUNNING)
599 928 {
600 if (alloc) 929 #define SYM(sym) PL_ ## sym
930 CORO_RSS;
931 #undef SYM
932 }
933 else
934 {
935 #define SYM(sym) coro->slot->sym
936 CORO_RSS;
937 #undef SYM
938 }
601 { 939 }
602#if HAVE_MMAP 940
603 stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */ 941 return rss;
604 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 942}
605 if (stack->sptr == (void *)-1) 943
944/** coroutine stack handling ************************************************/
945
946static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
947static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
948static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
949
950/* apparently < 5.8.8 */
951#ifndef MgPV_nolen_const
952#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
953 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
954 (const char*)(mg)->mg_ptr)
606#endif 955#endif
956
957/*
958 * This overrides the default magic get method of %SIG elements.
959 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
960 * and instead of trying to save and restore the hash elements, we just provide
961 * readback here.
962 */
963static int
964coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
965{
966 const char *s = MgPV_nolen_const (mg);
967
968 if (*s == '_')
969 {
970 SV **svp = 0;
971
972 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
973 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
974
975 if (svp)
607 { 976 {
608 /*FIXME*//*D*//* reasonable stack size! */ 977 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
609 stack->ssize = - (STACKSIZE * sizeof (long)); 978 return 0;
610 New (0, stack->sptr, STACKSIZE, long);
611 } 979 }
612 } 980 }
613 else
614 stack->sptr = 0;
615 981
616 ctx->stack = stack; 982 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
617} 983}
618 984
619static void 985static int
620deallocate_stack (Coro__State ctx) 986coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
621{ 987{
622 coro_stack *stack = ctx->stack; 988 const char *s = MgPV_nolen_const (mg);
623 989
624 ctx->stack = 0; 990 if (*s == '_')
625
626 if (stack)
627 { 991 {
628 if (!--stack->refcnt) 992 SV **svp = 0;
993
994 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
995 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
996
997 if (svp)
629 { 998 {
630#ifdef HAVE_MMAP 999 SV *old = *svp;
631 if (stack->ssize > 0 && stack->sptr) 1000 *svp = 0;
632 munmap (stack->sptr, stack->ssize); 1001 SvREFCNT_dec (old);
633 else 1002 return 0;
634#endif
635 Safefree (stack->sptr);
636
637 Safefree (stack);
638 } 1003 }
639 else if (ctx->gencnt == stack->gencnt) 1004 }
640 --stack->usecnt; 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 == '_')
641 } 1015 {
642} 1016 SV **svp = 0;
643 1017
1018 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1019 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1020
1021 if (svp)
1022 {
1023 SV *old = *svp;
1024 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1025 SvREFCNT_dec (old);
1026 return 0;
1027 }
1028 }
1029
1030 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1031}
1032
1033static void
1034prepare_nop (pTHX_ struct coro_transfer_args *ta)
1035{
1036 /* kind of mega-hacky, but works */
1037 ta->next = ta->prev = (struct coro *)ta;
1038}
1039
644static void 1040static int
645setup_coro (void *arg) 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 */
1055init_perl (pTHX_ struct coro *coro)
646{ 1056{
647 /* 1057 /*
648 * emulate part of the perl startup here. 1058 * emulate part of the perl startup here.
649 */ 1059 */
1060 coro_init_stacks (aTHX);
1061
1062 PL_runops = RUNOPS_DEFAULT;
1063 PL_curcop = &PL_compiling;
1064 PL_in_eval = EVAL_NULL;
1065 PL_comppad = 0;
1066 PL_comppad_name = 0;
1067 PL_comppad_name_fill = 0;
1068 PL_comppad_name_floor = 0;
1069 PL_curpm = 0;
1070 PL_curpad = 0;
1071 PL_localizing = 0;
1072 PL_restartop = 0;
1073#if PERL_VERSION_ATLEAST (5,10,0)
1074 PL_parser = 0;
1075#endif
1076 PL_hints = 0;
1077
1078 /* recreate the die/warn hooks */
1079 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
1080 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
1081
1082 GvSV (PL_defgv) = newSV (0);
1083 GvAV (PL_defgv) = coro->args; coro->args = 0;
1084 GvSV (PL_errgv) = newSV (0);
1085 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1086 GvHV (PL_hintgv) = 0;
1087 PL_rs = newSVsv (GvSV (irsgv));
1088 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1089
1090 {
1091 dSP;
1092 UNOP myop;
1093
1094 Zero (&myop, 1, UNOP);
1095 myop.op_next = Nullop;
1096 myop.op_type = OP_ENTERSUB;
1097 myop.op_flags = OPf_WANT_VOID;
1098
1099 PUSHMARK (SP);
1100 PUSHs ((SV *)coro->startcv);
1101 PUTBACK;
1102 PL_op = (OP *)&myop;
1103 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1104 }
1105
1106 /* this newly created coroutine might be run on an existing cctx which most
1107 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1108 */
1109 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1110 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
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
1132static void
1133coro_unwind_stacks (pTHX)
1134{
1135 if (!IN_DESTRUCT)
1136 {
1137 /* restore all saved variables and stuff */
1138 LEAVE_SCOPE (0);
1139 assert (PL_tmps_floor == -1);
1140
1141 /* free all temporaries */
1142 FREETMPS;
1143 assert (PL_tmps_ix == -1);
1144
1145 /* unwind all extra stacks */
1146 POPSTACK_TO (PL_mainstack);
1147
1148 /* unwind main stack */
1149 dounwind (-1);
1150 }
1151}
1152
1153static void
1154destroy_perl (pTHX_ struct coro *coro)
1155{
1156 SV *svf [9];
1157
1158 {
1159 struct coro *current = SvSTATE_current;
1160
1161 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1162
1163 save_perl (aTHX_ current);
1164 SvRV_set (coro_current, (SV *)coro->hv); /* this will cause acroak in transfer_check */
1165 load_perl (aTHX_ coro);
1166
1167 coro_unwind_stacks (aTHX);
1168 coro_destruct_stacks (aTHX);
1169
1170 /* restore swapped sv's */
1171 SWAP_SVS (coro);
1172
1173 // now save some sv's to be free'd later
1174 svf [0] = GvSV (PL_defgv);
1175 svf [1] = (SV *)GvAV (PL_defgv);
1176 svf [2] = GvSV (PL_errgv);
1177 svf [3] = (SV *)PL_defoutgv;
1178 svf [4] = PL_rs;
1179 svf [5] = GvSV (irsgv);
1180 svf [6] = (SV *)GvHV (PL_hintgv);
1181 svf [7] = PL_diehook;
1182 svf [8] = PL_warnhook;
1183 assert (9 == sizeof (svf) / sizeof (*svf));
1184
1185 SvRV_set (coro_current, (SV *)current->hv);
1186 load_perl (aTHX_ current);
1187 }
1188
1189 {
1190 unsigned int i;
1191
1192 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1193 SvREFCNT_dec (svf [i]);
1194
1195 SvREFCNT_dec (coro->saved_deffh);
1196 SvREFCNT_dec (coro->rouse_cb);
1197 SvREFCNT_dec (coro->invoke_cb);
1198 SvREFCNT_dec (coro->invoke_av);
1199 }
1200}
1201
1202INLINE void
1203free_coro_mortal (pTHX)
1204{
1205 if (expect_true (coro_mortal))
1206 {
1207 SvREFCNT_dec (coro_mortal);
1208 coro_mortal = 0;
1209 }
1210}
1211
1212static int
1213runops_trace (pTHX)
1214{
1215 COP *oldcop = 0;
1216 int oldcxix = -2;
1217
1218 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1219 {
1220 PERL_ASYNC_CHECK ();
1221
1222 if (cctx_current->flags & CC_TRACE_ALL)
1223 {
1224 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1225 {
1226 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1227 SV **bot, **top;
1228 AV *av = newAV (); /* return values */
1229 SV **cb;
1230 dSP;
1231
1232 GV *gv = CvGV (cx->blk_sub.cv);
1233 SV *fullname = sv_2mortal (newSV (0));
1234 if (isGV (gv))
1235 gv_efullname3 (fullname, gv, 0);
1236
1237 bot = PL_stack_base + cx->blk_oldsp + 1;
1238 top = cx->blk_gimme == G_ARRAY ? SP + 1
1239 : cx->blk_gimme == G_SCALAR ? bot + 1
1240 : bot;
1241
1242 av_extend (av, top - bot);
1243 while (bot < top)
1244 av_push (av, SvREFCNT_inc_NN (*bot++));
1245
1246 PL_runops = RUNOPS_DEFAULT;
1247 ENTER;
1248 SAVETMPS;
1249 EXTEND (SP, 3);
1250 PUSHMARK (SP);
1251 PUSHs (&PL_sv_no);
1252 PUSHs (fullname);
1253 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1254 PUTBACK;
1255 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1256 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1257 SPAGAIN;
1258 FREETMPS;
1259 LEAVE;
1260 PL_runops = runops_trace;
1261 }
1262
1263 if (oldcop != PL_curcop)
1264 {
1265 oldcop = PL_curcop;
1266
1267 if (PL_curcop != &PL_compiling)
1268 {
1269 SV **cb;
1270
1271 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1272 {
1273 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1274
1275 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1276 {
1277 dSP;
1278 GV *gv = CvGV (cx->blk_sub.cv);
1279 SV *fullname = sv_2mortal (newSV (0));
1280
1281 if (isGV (gv))
1282 gv_efullname3 (fullname, gv, 0);
1283
1284 PL_runops = RUNOPS_DEFAULT;
1285 ENTER;
1286 SAVETMPS;
1287 EXTEND (SP, 3);
1288 PUSHMARK (SP);
1289 PUSHs (&PL_sv_yes);
1290 PUSHs (fullname);
1291 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1292 PUTBACK;
1293 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1294 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1295 SPAGAIN;
1296 FREETMPS;
1297 LEAVE;
1298 PL_runops = runops_trace;
1299 }
1300
1301 oldcxix = cxstack_ix;
1302 }
1303
1304 if (cctx_current->flags & CC_TRACE_LINE)
1305 {
1306 dSP;
1307
1308 PL_runops = RUNOPS_DEFAULT;
1309 ENTER;
1310 SAVETMPS;
1311 EXTEND (SP, 3);
1312 PL_runops = RUNOPS_DEFAULT;
1313 PUSHMARK (SP);
1314 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1315 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1316 PUTBACK;
1317 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1318 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1319 SPAGAIN;
1320 FREETMPS;
1321 LEAVE;
1322 PL_runops = runops_trace;
1323 }
1324 }
1325 }
1326 }
1327 }
1328
1329 TAINT_NOT;
1330 return 0;
1331}
1332
1333static struct CoroSLF cctx_ssl_frame;
1334
1335static void
1336slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1337{
1338 ta->prev = 0;
1339}
1340
1341static int
1342slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1343{
1344 *frame = cctx_ssl_frame;
1345
1346 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1347}
1348
1349/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1350static void NOINLINE
1351cctx_prepare (pTHX)
1352{
1353 PL_top_env = &PL_start_env;
1354
1355 if (cctx_current->flags & CC_TRACE)
1356 PL_runops = runops_trace;
1357
1358 /* we already must be executing an SLF op, there is no other valid way
1359 * that can lead to creation of a new cctx */
1360 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1361 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1362
1363 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1364 cctx_ssl_frame = slf_frame;
1365
1366 slf_frame.prepare = slf_prepare_set_stacklevel;
1367 slf_frame.check = slf_check_set_stacklevel;
1368}
1369
1370/* the tail of transfer: execute stuff we can only do after a transfer */
1371INLINE void
1372transfer_tail (pTHX)
1373{
1374 free_coro_mortal (aTHX);
1375}
1376
1377/*
1378 * this is a _very_ stripped down perl interpreter ;)
1379 */
1380static void
1381cctx_run (void *arg)
1382{
1383#ifdef USE_ITHREADS
1384# if CORO_PTHREAD
1385 PERL_SET_CONTEXT (coro_thx);
1386# endif
1387#endif
1388 {
1389 dTHX;
1390
1391 /* normally we would need to skip the entersub here */
1392 /* not doing so will re-execute it, which is exactly what we want */
1393 /* PL_nop = PL_nop->op_next */
1394
1395 /* inject a fake subroutine call to cctx_init */
1396 cctx_prepare (aTHX);
1397
1398 /* cctx_run is the alternative tail of transfer() */
1399 transfer_tail (aTHX);
1400
1401 /* somebody or something will hit me for both perl_run and PL_restartop */
1402 PL_restartop = PL_op;
1403 perl_run (PL_curinterp);
1404 /*
1405 * Unfortunately, there is no way to get at the return values of the
1406 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1407 * runtime errors here, as this is just a random interpreter, not a thread.
1408 */
1409
1410 /*
1411 * If perl-run returns we assume exit() was being called or the coro
1412 * fell off the end, which seems to be the only valid (non-bug)
1413 * reason for perl_run to return. We try to exit by jumping to the
1414 * bootstrap-time "top" top_env, as we cannot restore the "main"
1415 * coroutine as Coro has no such concept.
1416 * This actually isn't valid with the pthread backend, but OSes requiring
1417 * that backend are too broken to do it in a standards-compliant way.
1418 */
1419 PL_top_env = main_top_env;
1420 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1421 }
1422}
1423
1424static coro_cctx *
1425cctx_new ()
1426{
1427 coro_cctx *cctx;
1428
1429 ++cctx_count;
1430 New (0, cctx, 1, coro_cctx);
1431
1432 cctx->gen = cctx_gen;
1433 cctx->flags = 0;
1434 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1435
1436 return cctx;
1437}
1438
1439/* create a new cctx only suitable as source */
1440static coro_cctx *
1441cctx_new_empty ()
1442{
1443 coro_cctx *cctx = cctx_new ();
1444
1445 cctx->sptr = 0;
1446 coro_create (&cctx->cctx, 0, 0, 0, 0);
1447
1448 return cctx;
1449}
1450
1451/* create a new cctx suitable as destination/running a perl interpreter */
1452static coro_cctx *
1453cctx_new_run ()
1454{
1455 coro_cctx *cctx = cctx_new ();
1456 void *stack_start;
1457 size_t stack_size;
1458
1459#if HAVE_MMAP
1460 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1461 /* mmap supposedly does allocate-on-write for us */
1462 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1463
1464 if (cctx->sptr != (void *)-1)
1465 {
1466 #if CORO_STACKGUARD
1467 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1468 #endif
1469 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1470 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1471 cctx->flags |= CC_MAPPED;
1472 }
1473 else
1474#endif
1475 {
1476 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1477 New (0, cctx->sptr, cctx_stacksize, long);
1478
1479 if (!cctx->sptr)
1480 {
1481 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1482 _exit (EXIT_FAILURE);
1483 }
1484
1485 stack_start = cctx->sptr;
1486 stack_size = cctx->ssize;
1487 }
1488
1489 #if CORO_USE_VALGRIND
1490 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1491 #endif
1492
1493 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1494
1495 return cctx;
1496}
1497
1498static void
1499cctx_destroy (coro_cctx *cctx)
1500{
1501 if (!cctx)
1502 return;
1503
1504 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1505
1506 --cctx_count;
1507 coro_destroy (&cctx->cctx);
1508
1509 /* coro_transfer creates new, empty cctx's */
1510 if (cctx->sptr)
1511 {
1512 #if CORO_USE_VALGRIND
1513 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1514 #endif
1515
1516#if HAVE_MMAP
1517 if (cctx->flags & CC_MAPPED)
1518 munmap (cctx->sptr, cctx->ssize);
1519 else
1520#endif
1521 Safefree (cctx->sptr);
1522 }
1523
1524 Safefree (cctx);
1525}
1526
1527/* wether this cctx should be destructed */
1528#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1529
1530static coro_cctx *
1531cctx_get (pTHX)
1532{
1533 while (expect_true (cctx_first))
1534 {
1535 coro_cctx *cctx = cctx_first;
1536 cctx_first = cctx->next;
1537 --cctx_idle;
1538
1539 if (expect_true (!CCTX_EXPIRED (cctx)))
1540 return cctx;
1541
1542 cctx_destroy (cctx);
1543 }
1544
1545 return cctx_new_run ();
1546}
1547
1548static void
1549cctx_put (coro_cctx *cctx)
1550{
1551 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1552
1553 /* free another cctx if overlimit */
1554 if (expect_false (cctx_idle >= cctx_max_idle))
1555 {
1556 coro_cctx *first = cctx_first;
1557 cctx_first = first->next;
1558 --cctx_idle;
1559
1560 cctx_destroy (first);
1561 }
1562
1563 ++cctx_idle;
1564 cctx->next = cctx_first;
1565 cctx_first = cctx;
1566}
1567
1568/** coroutine switching *****************************************************/
1569
1570static void
1571transfer_check (pTHX_ struct coro *prev, struct coro *next)
1572{
1573 /* TODO: throwing up here is considered harmful */
1574
1575 if (expect_true (prev != next))
1576 {
1577 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1578 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1579
1580 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1581 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1582
1583#if !PERL_VERSION_ATLEAST (5,10,0)
1584 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1585 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1586#endif
1587 }
1588}
1589
1590/* always use the TRANSFER macro */
1591static void NOINLINE /* noinline so we have a fixed stackframe */
1592transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1593{
1594 dSTACKLEVEL;
1595
1596 /* sometimes transfer is only called to set idle_sp */
1597 if (expect_false (!prev))
1598 {
1599 cctx_current->idle_sp = STACKLEVEL;
1600 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1601 }
1602 else if (expect_true (prev != next))
1603 {
1604 coro_cctx *cctx_prev;
1605
1606 if (expect_false (prev->flags & CF_NEW))
1607 {
1608 /* create a new empty/source context */
1609 prev->flags &= ~CF_NEW;
1610 prev->flags |= CF_RUNNING;
1611 }
1612
1613 prev->flags &= ~CF_RUNNING;
1614 next->flags |= CF_RUNNING;
1615
1616 /* first get rid of the old state */
1617 save_perl (aTHX_ prev);
1618
1619 if (expect_false (next->flags & CF_NEW))
1620 {
1621 /* need to start coroutine */
1622 next->flags &= ~CF_NEW;
1623 /* setup coroutine call */
1624 init_perl (aTHX_ next);
1625 }
1626 else
1627 load_perl (aTHX_ next);
1628
1629 /* possibly untie and reuse the cctx */
1630 if (expect_true (
1631 cctx_current->idle_sp == STACKLEVEL
1632 && !(cctx_current->flags & CC_TRACE)
1633 && !force_cctx
1634 ))
1635 {
1636 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1637 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1638
1639 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1640 /* without this the next cctx_get might destroy the running cctx while still in use */
1641 if (expect_false (CCTX_EXPIRED (cctx_current)))
1642 if (expect_true (!next->cctx))
1643 next->cctx = cctx_get (aTHX);
1644
1645 cctx_put (cctx_current);
1646 }
1647 else
1648 prev->cctx = cctx_current;
1649
1650 ++next->usecount;
1651
1652 cctx_prev = cctx_current;
1653 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1654
1655 next->cctx = 0;
1656
1657 if (expect_false (cctx_prev != cctx_current))
1658 {
1659 cctx_prev->top_env = PL_top_env;
1660 PL_top_env = cctx_current->top_env;
1661 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1662 }
1663
1664 transfer_tail (aTHX);
1665 }
1666}
1667
1668#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1669#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1670
1671/** high level stuff ********************************************************/
1672
1673static void
1674coro_state_destroy (pTHX_ struct coro *coro)
1675{
1676 if (coro->flags & CF_DESTROYED)
1677 return;
1678
1679 /* this callback is reserved for slf functions needing to do cleanup */
1680 if (coro->on_destroy && !PL_dirty)
1681 coro->on_destroy (aTHX_ coro);
1682
1683 /*
1684 * The on_destroy above most likely is from an SLF call.
1685 * Since by definition the SLF call will not finish when we destroy
1686 * the coro, we will have to force-finish it here, otherwise
1687 * cleanup functions cannot call SLF functions.
1688 */
1689 coro->slf_frame.prepare = 0;
1690
1691 coro->flags |= CF_DESTROYED;
1692
1693 if (coro->flags & CF_READY)
1694 {
1695 /* reduce nready, as destroying a ready coro effectively unreadies it */
1696 /* alternative: look through all ready queues and remove the coro */
1697 --coro_nready;
1698 }
1699 else
1700 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1701
1702 if (coro->mainstack
1703 && coro->mainstack != main_mainstack
1704 && coro->slot
1705 && !PL_dirty)
1706 destroy_perl (aTHX_ coro);
1707
1708 if (coro->next) coro->next->prev = coro->prev;
1709 if (coro->prev) coro->prev->next = coro->next;
1710 if (coro == coro_first) coro_first = coro->next;
1711
1712 cctx_destroy (coro->cctx);
1713 SvREFCNT_dec (coro->startcv);
1714 SvREFCNT_dec (coro->args);
1715 SvREFCNT_dec (coro->swap_sv);
1716 SvREFCNT_dec (CORO_THROW);
1717}
1718
1719static int
1720coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1721{
1722 struct coro *coro = (struct coro *)mg->mg_ptr;
1723 mg->mg_ptr = 0;
1724
1725 coro->hv = 0;
1726
1727 if (--coro->refcnt < 0)
1728 {
1729 coro_state_destroy (aTHX_ coro);
1730 Safefree (coro);
1731 }
1732
1733 return 0;
1734}
1735
1736static int
1737coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1738{
1739 struct coro *coro = (struct coro *)mg->mg_ptr;
1740
1741 ++coro->refcnt;
1742
1743 return 0;
1744}
1745
1746static MGVTBL coro_state_vtbl = {
1747 0, 0, 0, 0,
1748 coro_state_free,
1749 0,
1750#ifdef MGf_DUP
1751 coro_state_dup,
1752#else
1753# define MGf_DUP 0
1754#endif
1755};
1756
1757static void
1758prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1759{
1760 ta->prev = SvSTATE (prev_sv);
1761 ta->next = SvSTATE (next_sv);
1762 TRANSFER_CHECK (*ta);
1763}
1764
1765static void
1766api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1767{
1768 struct coro_transfer_args ta;
1769
1770 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1771 TRANSFER (ta, 1);
1772}
1773
1774/** Coro ********************************************************************/
1775
1776INLINE void
1777coro_enq (pTHX_ struct coro *coro)
1778{
1779 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1780
1781 SvREFCNT_inc_NN (coro->hv);
1782
1783 coro->next_ready = 0;
1784 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1785 ready [1] = coro;
1786}
1787
1788INLINE struct coro *
1789coro_deq (pTHX)
1790{
1791 int prio;
1792
1793 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1794 {
1795 struct coro **ready = coro_ready [prio];
1796
1797 if (ready [0])
1798 {
1799 struct coro *coro = ready [0];
1800 ready [0] = coro->next_ready;
1801 return coro;
1802 }
1803 }
1804
1805 return 0;
1806}
1807
1808static void
1809invoke_sv_ready_hook_helper (void)
1810{
650 dTHX; 1811 dTHX;
651 dSP; 1812 dSP;
652 Coro__State ctx = (Coro__State)arg;
653 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
654 1813
655 coro_init_stacks (aTHX); 1814 ENTER;
656 /*PL_curcop = 0;*/ 1815 SAVETMPS;
657 /*PL_in_eval = PL_in_eval;*/ /* inherit */
658 SvREFCNT_dec (GvAV (PL_defgv));
659 GvAV (PL_defgv) = ctx->args; ctx->args = 0;
660 1816
661 SPAGAIN;
662
663 if (ctx->stack)
664 {
665 ctx->cursp = 0;
666
667 PUSHMARK(SP); 1817 PUSHMARK (SP);
668 PUTBACK; 1818 PUTBACK;
669 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 1819 call_sv (coro_readyhook, G_VOID | G_DISCARD);
670 1820
671 if (SvTRUE (ERRSV)) 1821 FREETMPS;
672 croak (NULL); 1822 LEAVE;
673 else 1823}
674 croak ("FATAL: CCTXT coroutine returned!"); 1824
1825static int
1826api_ready (pTHX_ SV *coro_sv)
1827{
1828 struct coro *coro = SvSTATE (coro_sv);
1829
1830 if (coro->flags & CF_READY)
1831 return 0;
1832
1833 coro->flags |= CF_READY;
1834
1835 coro_enq (aTHX_ coro);
1836
1837 if (!coro_nready++)
1838 if (coroapi.readyhook)
1839 coroapi.readyhook ();
1840
1841 return 1;
1842}
1843
1844static int
1845api_is_ready (pTHX_ SV *coro_sv)
1846{
1847 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1848}
1849
1850/* expects to own a reference to next->hv */
1851INLINE void
1852prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1853{
1854 SV *prev_sv = SvRV (coro_current);
1855
1856 ta->prev = SvSTATE_hv (prev_sv);
1857 ta->next = next;
1858
1859 TRANSFER_CHECK (*ta);
1860
1861 SvRV_set (coro_current, (SV *)next->hv);
1862
1863 free_coro_mortal (aTHX);
1864 coro_mortal = prev_sv;
1865}
1866
1867static void
1868prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1869{
1870 for (;;)
675 } 1871 {
676 else 1872 struct coro *next = coro_deq (aTHX);
677 {
678 UNOP myop;
679 1873
680 PL_op = (OP *)&myop; 1874 if (expect_true (next))
681
682 Zero(&myop, 1, UNOP);
683 myop.op_next = Nullop;
684 myop.op_flags = OPf_WANT_VOID;
685
686 PUSHMARK(SP);
687 XPUSHs (sub_init);
688 /*
689 * the next line is slightly wrong, as PL_op->op_next
690 * is actually being executed so we skip the first op.
691 * that doesn't matter, though, since it is only
692 * pp_nextstate and we never return...
693 * ah yes, and I don't care anyways ;)
694 */
695 PUTBACK;
696 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
697 SPAGAIN;
698
699 ENTER; /* necessary e.g. for dounwind */
700 }
701}
702
703static void
704continue_coro (void *arg)
705{
706 /*
707 * this is a _very_ stripped down perl interpreter ;)
708 */
709 dTHX;
710 Coro__State ctx = (Coro__State)arg;
711 JMPENV coro_start_env;
712
713 PL_top_env = &ctx->start_env;
714
715 ctx->cursp = 0;
716 PL_op = PL_op->op_next;
717 CALLRUNOPS(aTHX);
718
719 abort ();
720}
721
722STATIC void
723transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
724{
725 dSTACKLEVEL;
726
727 if (prev != next)
728 {
729 if (next->mainstack)
730 { 1875 {
731 LOCK; 1876 /* cannot transfer to destroyed coros, skip and look for next */
732 SAVE (prev, flags); 1877 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
733 LOAD (next); 1878 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
734 UNLOCK; 1879 else
735
736 /* mark this state as in-use */
737 next->mainstack = 0;
738 next->tmps_ix = -2;
739
740 /* stacklevel changed? if yes, grab the stack for us! */
741 if (flags & TRANSFER_SAVE_CCTXT)
742 { 1880 {
743 if (!prev->stack) 1881 next->flags &= ~CF_READY;
744 allocate_stack (prev, 0); 1882 --coro_nready;
745 else if (prev->cursp != stacklevel 1883
746 && prev->stack->usecnt > 1) 1884 prepare_schedule_to (aTHX_ ta, next);
747 { 1885 break;
748 prev->gencnt = ++prev->stack->gencnt;
749 prev->stack->usecnt = 1;
750 }
751
752 /* has our stack been invalidated? */
753 if (next->stack && next->stack->gencnt != next->gencnt)
754 {
755 deallocate_stack (next);
756 allocate_stack (next, 1);
757 coro_create (&(next->stack->cctx),
758 continue_coro, (void *)next,
759 next->stack->sptr, labs (next->stack->ssize));
760 }
761
762 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
763 prev->cursp = stacklevel;
764 /* don't add any code here */
765 } 1886 }
766 else
767 next->cursp = stacklevel;
768 } 1887 }
769 else if (next->tmps_ix == -2)
770 croak ("tried to transfer to running coroutine");
771 else 1888 else
772 { 1889 {
773 LOCK; 1890 /* nothing to schedule: call the idle handler */
774 SAVE (prev, -1); /* first get rid of the old state */ 1891 if (SvROK (sv_idle)
775 UNLOCK; 1892 && SvOBJECT (SvRV (sv_idle)))
776
777 if (flags & TRANSFER_SAVE_CCTXT)
778 { 1893 {
779 if (!prev->stack) 1894 if (SvRV (sv_idle) == SvRV (coro_current))
780 allocate_stack (prev, 0); 1895 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
781 1896
782 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK) 1897 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
783 { 1898 api_ready (aTHX_ SvRV (sv_idle));
784 PL_top_env = &next->start_env; 1899 --coro_nready;
785
786 setup_coro (next);
787 next->cursp = stacklevel;
788
789 prev->stack->refcnt++;
790 prev->stack->usecnt++;
791 next->stack = prev->stack;
792 next->gencnt = prev->gencnt;
793 }
794 else
795 {
796 assert (!next->stack);
797 allocate_stack (next, 1);
798 coro_create (&(next->stack->cctx),
799 setup_coro, (void *)next,
800 next->stack->sptr, labs (next->stack->ssize));
801 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
802 prev->cursp = stacklevel;
803 /* don't add any code here */
804 }
805 } 1900 }
806 else 1901 else
807 { 1902 {
808 setup_coro (next); 1903 /* TODO: deprecated, remove, cannot work reliably *//*D*/
809 next->cursp = stacklevel; 1904 dSP;
1905
1906 ENTER;
1907 SAVETMPS;
1908
1909 PUSHMARK (SP);
1910 PUTBACK;
1911 call_sv (sv_idle, G_VOID | G_DISCARD);
1912
1913 FREETMPS;
1914 LEAVE;
810 } 1915 }
811 } 1916 }
812 } 1917 }
1918}
813 1919
814 LOCK; 1920INLINE void
1921prepare_cede (pTHX_ struct coro_transfer_args *ta)
1922{
1923 api_ready (aTHX_ coro_current);
1924 prepare_schedule (aTHX_ ta);
1925}
1926
1927INLINE void
1928prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1929{
1930 SV *prev = SvRV (coro_current);
1931
815 if (coro_mortal) 1932 if (coro_nready)
816 {
817 SvREFCNT_dec (coro_mortal);
818 coro_mortal = 0;
819 } 1933 {
820 UNLOCK; 1934 prepare_schedule (aTHX_ ta);
821} 1935 api_ready (aTHX_ prev);
822
823#define SV_CORO(sv,func) \
824 do { \
825 if (SvROK (sv)) \
826 sv = SvRV (sv); \
827 \
828 if (SvTYPE (sv) == SVt_PVHV) \
829 { \
830 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
831 \
832 if (!he) \
833 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
834 \
835 (sv) = SvRV (HeVAL(he)); \
836 } \
837 \
838 /* must also be changed inside Coro::Cont::yield */ \
839 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
840 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
841 \
842 } while(0)
843
844#define SvSTATE(sv) (struct coro *)SvIV (sv)
845
846static void
847api_transfer(pTHX_ SV *prev, SV *next, int flags)
848{
849 SV_CORO (prev, "Coro::transfer");
850 SV_CORO (next, "Coro::transfer");
851
852 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
853}
854
855/** Coro ********************************************************************/
856
857#define PRIO_MAX 3
858#define PRIO_HIGH 1
859#define PRIO_NORMAL 0
860#define PRIO_LOW -1
861#define PRIO_IDLE -3
862#define PRIO_MIN -4
863
864/* for Coro.pm */
865static GV *coro_current, *coro_idle;
866static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
867static int coro_nready;
868
869static void
870coro_enq (pTHX_ SV *sv)
871{
872 if (SvTYPE (sv) == SVt_PVHV)
873 { 1936 }
874 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0); 1937 else
875 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 1938 prepare_nop (aTHX_ ta);
1939}
876 1940
877 prio = prio > PRIO_MAX ? PRIO_MAX 1941static void
878 : prio < PRIO_MIN ? PRIO_MIN 1942api_schedule (pTHX)
879 : prio; 1943{
1944 struct coro_transfer_args ta;
880 1945
881 av_push (coro_ready [prio - PRIO_MIN], sv); 1946 prepare_schedule (aTHX_ &ta);
882 coro_nready++; 1947 TRANSFER (ta, 1);
1948}
883 1949
1950static void
1951api_schedule_to (pTHX_ SV *coro_sv)
1952{
1953 struct coro_transfer_args ta;
1954 struct coro *next = SvSTATE (coro_sv);
1955
1956 SvREFCNT_inc_NN (coro_sv);
1957 prepare_schedule_to (aTHX_ &ta, next);
1958}
1959
1960static int
1961api_cede (pTHX)
1962{
1963 struct coro_transfer_args ta;
1964
1965 prepare_cede (aTHX_ &ta);
1966
1967 if (expect_true (ta.prev != ta.next))
1968 {
1969 TRANSFER (ta, 1);
884 return; 1970 return 1;
1971 }
1972 else
1973 return 0;
1974}
1975
1976static int
1977api_cede_notself (pTHX)
1978{
1979 if (coro_nready)
1980 {
1981 struct coro_transfer_args ta;
1982
1983 prepare_cede_notself (aTHX_ &ta);
1984 TRANSFER (ta, 1);
1985 return 1;
1986 }
1987 else
1988 return 0;
1989}
1990
1991static void
1992api_trace (pTHX_ SV *coro_sv, int flags)
1993{
1994 struct coro *coro = SvSTATE (coro_sv);
1995
1996 if (coro->flags & CF_RUNNING)
1997 croak ("cannot enable tracing on a running coroutine, caught");
1998
1999 if (flags & CC_TRACE)
2000 {
2001 if (!coro->cctx)
2002 coro->cctx = cctx_new_run ();
2003 else if (!(coro->cctx->flags & CC_TRACE))
2004 croak ("cannot enable tracing on coroutine with custom stack, caught");
2005
2006 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2007 }
2008 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2009 {
2010 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2011
2012 if (coro->flags & CF_RUNNING)
2013 PL_runops = RUNOPS_DEFAULT;
2014 else
2015 coro->slot->runops = RUNOPS_DEFAULT;
2016 }
2017}
2018
2019static void
2020coro_call_on_destroy (pTHX_ struct coro *coro)
2021{
2022 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
2023
2024 if (on_destroyp)
2025 {
2026 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
2027 AV *on_destroy = sv_2mortal (SvREFCNT_inc ((AV *)SvRV (*on_destroyp)));
2028 AV *status = statusp ? sv_2mortal (SvREFCNT_inc ((AV *)SvRV (*statusp))) : 0;
2029
2030 while (AvFILLp (on_destroy) >= 0)
2031 {
2032 dSP; /* don't disturb outer sp */
2033 SV *cb = av_pop (on_destroy);
2034
2035 PUSHMARK (SP);
2036
2037 if (statusp)
2038 {
2039 int i;
2040 EXTEND (SP, AvFILLp (status) + 1);
2041
2042 for (i = 0; i <= AvFILLp (status); ++i)
2043 PUSHs (AvARRAY (status)[i]);
2044 }
2045
2046 PUTBACK;
2047 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
2048 }
2049 }
2050}
2051
2052static void
2053coro_set_status (HV *coro_hv, SV **arg, int items)
2054{
2055 AV *av = newAV ();
2056
2057 /* items are actually not so common, so optimise for this case */
2058 if (items)
2059 {
2060 int i;
2061
2062 av_extend (av, items - 1);
2063
2064 for (i = 0; i < items; ++i)
2065 av_push (av, SvREFCNT_inc_NN (arg [i]));
2066 }
2067
2068 hv_store (coro_hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
2069}
2070
2071static void
2072slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2073{
2074 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2075 api_ready (aTHX_ sv_manager);
2076
2077 frame->prepare = prepare_schedule;
2078 frame->check = slf_check_repeat;
2079
2080 /* as a minor optimisation, we could unwind all stacks here */
2081 /* but that puts extra pressure on pp_slf, and is not worth much */
2082 /*coro_unwind_stacks (aTHX);*/
2083}
2084
2085static void
2086slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2087{
2088 HV *coro_hv = (HV *)SvRV (coro_current);
2089
2090 coro_set_status (coro_hv, arg, items);
2091 slf_init_terminate_cancel_common (frame, coro_hv);
2092}
2093
2094static void
2095slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2096{
2097 HV *coro_hv;
2098 struct coro *coro;
2099
2100 if (items <= 0)
2101 croak ("Coro::cancel called without coro object,");
2102
2103 coro = SvSTATE (arg [0]);
2104 coro_hv = coro->hv;
2105
2106 coro_set_status (coro_hv, arg + 1, items - 1);
2107
2108 if (expect_false (coro->flags & CF_NOCANCEL))
2109 {
2110 /* coro currently busy cancelling something, so just notify it */
2111 coro->slf_frame.data = (void *)coro;
2112
2113 frame->prepare = prepare_nop;
2114 frame->check = slf_check_nop;
2115 }
2116 else if (coro_hv == (HV *)SvRV (coro_current))
2117 {
2118 /* cancelling the current coro is allowed, and equals terminate */
2119 slf_init_terminate_cancel_common (frame, coro_hv);
2120 }
2121 else
2122 {
2123 struct coro *self = SvSTATE_current;
2124
2125 /* otherwise we cancel directly, purely for speed reasons
2126 * unfortunately, this requires some magic trickery, as
2127 * somebody else could cancel us, so we have to fight the cancellation.
2128 * this is ugly, and hopefully fully worth the extra speed.
2129 * besides, I can't get the slow-but-safe version working...
2130 */
2131 slf_frame.data = 0;
2132 self->flags |= CF_NOCANCEL;
2133
2134 coro_state_destroy (aTHX_ coro);
2135 coro_call_on_destroy (aTHX_ coro);
2136
2137 self->flags &= ~CF_NOCANCEL;
2138
2139 if (slf_frame.data)
2140 {
2141 /* while we were busy we have been cancelled, so terminate */
2142 slf_init_terminate_cancel_common (frame, self->hv);
2143 }
2144 else
2145 {
2146 frame->prepare = prepare_nop;
2147 frame->check = slf_check_nop;
2148 }
2149 }
2150}
2151
2152/*****************************************************************************/
2153/* async pool handler */
2154
2155static int
2156slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2157{
2158 HV *hv = (HV *)SvRV (coro_current);
2159 struct coro *coro = (struct coro *)frame->data;
2160
2161 if (!coro->invoke_cb)
2162 return 1; /* loop till we have invoke */
2163 else
2164 {
2165 hv_store (hv, "desc", sizeof ("desc") - 1,
2166 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2167
2168 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2169
2170 {
2171 dSP;
2172 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2173 PUTBACK;
885 } 2174 }
886 2175
887 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 2176 SvREFCNT_dec (GvAV (PL_defgv));
2177 GvAV (PL_defgv) = coro->invoke_av;
2178 coro->invoke_av = 0;
2179
2180 return 0;
2181 }
2182}
2183
2184static void
2185slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2186{
2187 HV *hv = (HV *)SvRV (coro_current);
2188 struct coro *coro = SvSTATE_hv ((SV *)hv);
2189
2190 if (expect_true (coro->saved_deffh))
2191 {
2192 /* subsequent iteration */
2193 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2194 coro->saved_deffh = 0;
2195
2196 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2197 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2198 {
2199 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
2200 coro->invoke_av = newAV ();
2201
2202 frame->prepare = prepare_nop;
2203 }
2204 else
2205 {
2206 av_clear (GvAV (PL_defgv));
2207 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2208
2209 coro->prio = 0;
2210
2211 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2212 api_trace (aTHX_ coro_current, 0);
2213
2214 frame->prepare = prepare_schedule;
2215 av_push (av_async_pool, SvREFCNT_inc (hv));
2216 }
2217 }
2218 else
2219 {
2220 /* first iteration, simply fall through */
2221 frame->prepare = prepare_nop;
2222 }
2223
2224 frame->check = slf_check_pool_handler;
2225 frame->data = (void *)coro;
2226}
2227
2228/*****************************************************************************/
2229/* rouse callback */
2230
2231#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2232
2233static void
2234coro_rouse_callback (pTHX_ CV *cv)
2235{
2236 dXSARGS;
2237 SV *data = (SV *)S_GENSUB_ARG;
2238
2239 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2240 {
2241 /* first call, set args */
2242 SV *coro = SvRV (data);
2243 AV *av = newAV ();
2244
2245 SvRV_set (data, (SV *)av);
2246
2247 /* better take a full copy of the arguments */
2248 while (items--)
2249 av_store (av, items, newSVsv (ST (items)));
2250
2251 api_ready (aTHX_ coro);
2252 SvREFCNT_dec (coro);
2253 }
2254
2255 XSRETURN_EMPTY;
2256}
2257
2258static int
2259slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2260{
2261 SV *data = (SV *)frame->data;
2262
2263 if (CORO_THROW)
2264 return 0;
2265
2266 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2267 return 1;
2268
2269 /* now push all results on the stack */
2270 {
2271 dSP;
2272 AV *av = (AV *)SvRV (data);
2273 int i;
2274
2275 EXTEND (SP, AvFILLp (av) + 1);
2276 for (i = 0; i <= AvFILLp (av); ++i)
2277 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2278
2279 /* we have stolen the elements, so set length to zero and free */
2280 AvFILLp (av) = -1;
2281 av_undef (av);
2282
2283 PUTBACK;
2284 }
2285
2286 return 0;
2287}
2288
2289static void
2290slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2291{
2292 SV *cb;
2293
2294 if (items)
2295 cb = arg [0];
2296 else
2297 {
2298 struct coro *coro = SvSTATE_current;
2299
2300 if (!coro->rouse_cb)
2301 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2302
2303 cb = sv_2mortal (coro->rouse_cb);
2304 coro->rouse_cb = 0;
2305 }
2306
2307 if (!SvROK (cb)
2308 || SvTYPE (SvRV (cb)) != SVt_PVCV
2309 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2310 croak ("Coro::rouse_wait called with illegal callback argument,");
2311
2312 {
2313 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2314 SV *data = (SV *)S_GENSUB_ARG;
2315
2316 frame->data = (void *)data;
2317 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2318 frame->check = slf_check_rouse_wait;
2319 }
888} 2320}
889 2321
890static SV * 2322static SV *
891coro_deq (pTHX_ int min_prio) 2323coro_new_rouse_cb (pTHX)
892{ 2324{
893 int prio = PRIO_MAX - PRIO_MIN; 2325 HV *hv = (HV *)SvRV (coro_current);
2326 struct coro *coro = SvSTATE_hv (hv);
2327 SV *data = newRV_inc ((SV *)hv);
2328 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
894 2329
895 min_prio -= PRIO_MIN; 2330 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
896 if (min_prio < 0) 2331 SvREFCNT_dec (data); /* magicext increases the refcount */
897 min_prio = 0;
898 2332
899 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2333 SvREFCNT_dec (coro->rouse_cb);
900 if (av_len (coro_ready[prio]) >= 0) 2334 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2335
2336 return cb;
2337}
2338
2339/*****************************************************************************/
2340/* schedule-like-function opcode (SLF) */
2341
2342static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2343static const CV *slf_cv;
2344static SV **slf_argv;
2345static int slf_argc, slf_arga; /* count, allocated */
2346static I32 slf_ax; /* top of stack, for restore */
2347
2348/* this restores the stack in the case we patched the entersub, to */
2349/* recreate the stack frame as perl will on following calls */
2350/* since entersub cleared the stack */
2351static OP *
2352pp_restore (pTHX)
2353{
2354 int i;
2355 SV **SP = PL_stack_base + slf_ax;
2356
2357 PUSHMARK (SP);
2358
2359 EXTEND (SP, slf_argc + 1);
2360
2361 for (i = 0; i < slf_argc; ++i)
2362 PUSHs (sv_2mortal (slf_argv [i]));
2363
2364 PUSHs ((SV *)CvGV (slf_cv));
2365
2366 RETURNOP (slf_restore.op_first);
2367}
2368
2369static void
2370slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2371{
2372 SV **arg = (SV **)slf_frame.data;
2373
2374 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2375}
2376
2377static void
2378slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2379{
2380 if (items != 2)
2381 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2382
2383 frame->prepare = slf_prepare_transfer;
2384 frame->check = slf_check_nop;
2385 frame->data = (void *)arg; /* let's hope it will stay valid */
2386}
2387
2388static void
2389slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2390{
2391 frame->prepare = prepare_schedule;
2392 frame->check = slf_check_nop;
2393}
2394
2395static void
2396slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2397{
2398 struct coro *next = (struct coro *)slf_frame.data;
2399
2400 SvREFCNT_inc_NN (next->hv);
2401 prepare_schedule_to (aTHX_ ta, next);
2402}
2403
2404static void
2405slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2406{
2407 if (!items)
2408 croak ("Coro::schedule_to expects a coroutine argument, caught");
2409
2410 frame->data = (void *)SvSTATE (arg [0]);
2411 frame->prepare = slf_prepare_schedule_to;
2412 frame->check = slf_check_nop;
2413}
2414
2415static void
2416slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2417{
2418 api_ready (aTHX_ SvRV (coro_current));
2419
2420 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2421}
2422
2423static void
2424slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2425{
2426 frame->prepare = prepare_cede;
2427 frame->check = slf_check_nop;
2428}
2429
2430static void
2431slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2432{
2433 frame->prepare = prepare_cede_notself;
2434 frame->check = slf_check_nop;
2435}
2436
2437/*
2438 * these not obviously related functions are all rolled into one
2439 * function to increase chances that they all will call transfer with the same
2440 * stack offset
2441 * SLF stands for "schedule-like-function".
2442 */
2443static OP *
2444pp_slf (pTHX)
2445{
2446 I32 checkmark; /* mark SP to see how many elements check has pushed */
2447
2448 /* set up the slf frame, unless it has already been set-up */
2449 /* the latter happens when a new coro has been started */
2450 /* or when a new cctx was attached to an existing coroutine */
2451 if (expect_true (!slf_frame.prepare))
2452 {
2453 /* first iteration */
2454 dSP;
2455 SV **arg = PL_stack_base + TOPMARK + 1;
2456 int items = SP - arg; /* args without function object */
2457 SV *gv = *sp;
2458
2459 /* do a quick consistency check on the "function" object, and if it isn't */
2460 /* for us, divert to the real entersub */
2461 if (SvTYPE (gv) != SVt_PVGV
2462 || !GvCV (gv)
2463 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2464 return PL_ppaddr[OP_ENTERSUB](aTHX);
2465
2466 if (!(PL_op->op_flags & OPf_STACKED))
901 { 2467 {
902 coro_nready--; 2468 /* ampersand-form of call, use @_ instead of stack */
903 return av_shift (coro_ready[prio]); 2469 AV *av = GvAV (PL_defgv);
2470 arg = AvARRAY (av);
2471 items = AvFILLp (av) + 1;
904 } 2472 }
2473
2474 /* now call the init function, which needs to set up slf_frame */
2475 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2476 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2477
2478 /* pop args */
2479 SP = PL_stack_base + POPMARK;
2480
2481 PUTBACK;
2482 }
2483
2484 /* now that we have a slf_frame, interpret it! */
2485 /* we use a callback system not to make the code needlessly */
2486 /* complicated, but so we can run multiple perl coros from one cctx */
2487
2488 do
2489 {
2490 struct coro_transfer_args ta;
2491
2492 slf_frame.prepare (aTHX_ &ta);
2493 TRANSFER (ta, 0);
2494
2495 checkmark = PL_stack_sp - PL_stack_base;
2496 }
2497 while (slf_frame.check (aTHX_ &slf_frame));
2498
2499 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2500
2501 /* exception handling */
2502 if (expect_false (CORO_THROW))
2503 {
2504 SV *exception = sv_2mortal (CORO_THROW);
2505
2506 CORO_THROW = 0;
2507 sv_setsv (ERRSV, exception);
2508 croak (0);
2509 }
2510
2511 /* return value handling - mostly like entersub */
2512 /* make sure we put something on the stack in scalar context */
2513 if (GIMME_V == G_SCALAR)
2514 {
2515 dSP;
2516 SV **bot = PL_stack_base + checkmark;
2517
2518 if (sp == bot) /* too few, push undef */
2519 bot [1] = &PL_sv_undef;
2520 else if (sp != bot + 1) /* too many, take last one */
2521 bot [1] = *sp;
2522
2523 SP = bot + 1;
2524
2525 PUTBACK;
2526 }
2527
2528 return NORMAL;
2529}
2530
2531static void
2532api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2533{
2534 int i;
2535 SV **arg = PL_stack_base + ax;
2536 int items = PL_stack_sp - arg + 1;
2537
2538 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2539
2540 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2541 && PL_op->op_ppaddr != pp_slf)
2542 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2543
2544 CvFLAGS (cv) |= CVf_SLF;
2545 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2546 slf_cv = cv;
2547
2548 /* we patch the op, and then re-run the whole call */
2549 /* we have to put the same argument on the stack for this to work */
2550 /* and this will be done by pp_restore */
2551 slf_restore.op_next = (OP *)&slf_restore;
2552 slf_restore.op_type = OP_CUSTOM;
2553 slf_restore.op_ppaddr = pp_restore;
2554 slf_restore.op_first = PL_op;
2555
2556 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2557
2558 if (PL_op->op_flags & OPf_STACKED)
2559 {
2560 if (items > slf_arga)
2561 {
2562 slf_arga = items;
2563 Safefree (slf_argv);
2564 New (0, slf_argv, slf_arga, SV *);
2565 }
2566
2567 slf_argc = items;
2568
2569 for (i = 0; i < items; ++i)
2570 slf_argv [i] = SvREFCNT_inc (arg [i]);
2571 }
2572 else
2573 slf_argc = 0;
2574
2575 PL_op->op_ppaddr = pp_slf;
2576 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2577
2578 PL_op = (OP *)&slf_restore;
2579}
2580
2581/*****************************************************************************/
2582/* dynamic wind */
2583
2584static void
2585on_enterleave_call (pTHX_ SV *cb)
2586{
2587 dSP;
2588
2589 PUSHSTACK;
2590
2591 PUSHMARK (SP);
2592 PUTBACK;
2593 call_sv (cb, G_VOID | G_DISCARD);
2594 SPAGAIN;
2595
2596 POPSTACK;
2597}
2598
2599static SV *
2600coro_avp_pop_and_free (pTHX_ AV **avp)
2601{
2602 AV *av = *avp;
2603 SV *res = av_pop (av);
2604
2605 if (AvFILLp (av) < 0)
2606 {
2607 *avp = 0;
2608 SvREFCNT_dec (av);
2609 }
2610
2611 return res;
2612}
2613
2614static void
2615coro_pop_on_enter (pTHX_ void *coro)
2616{
2617 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2618 SvREFCNT_dec (cb);
2619}
2620
2621static void
2622coro_pop_on_leave (pTHX_ void *coro)
2623{
2624 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2625 on_enterleave_call (aTHX_ sv_2mortal (cb));
2626}
2627
2628/*****************************************************************************/
2629/* PerlIO::cede */
2630
2631typedef struct
2632{
2633 PerlIOBuf base;
2634 NV next, every;
2635} PerlIOCede;
2636
2637static IV
2638PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2639{
2640 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2641
2642 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2643 self->next = nvtime () + self->every;
2644
2645 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2646}
2647
2648static SV *
2649PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2650{
2651 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2652
2653 return newSVnv (self->every);
2654}
2655
2656static IV
2657PerlIOCede_flush (pTHX_ PerlIO *f)
2658{
2659 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2660 double now = nvtime ();
2661
2662 if (now >= self->next)
2663 {
2664 api_cede (aTHX);
2665 self->next = now + self->every;
2666 }
2667
2668 return PerlIOBuf_flush (aTHX_ f);
2669}
2670
2671static PerlIO_funcs PerlIO_cede =
2672{
2673 sizeof(PerlIO_funcs),
2674 "cede",
2675 sizeof(PerlIOCede),
2676 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2677 PerlIOCede_pushed,
2678 PerlIOBuf_popped,
2679 PerlIOBuf_open,
2680 PerlIOBase_binmode,
2681 PerlIOCede_getarg,
2682 PerlIOBase_fileno,
2683 PerlIOBuf_dup,
2684 PerlIOBuf_read,
2685 PerlIOBuf_unread,
2686 PerlIOBuf_write,
2687 PerlIOBuf_seek,
2688 PerlIOBuf_tell,
2689 PerlIOBuf_close,
2690 PerlIOCede_flush,
2691 PerlIOBuf_fill,
2692 PerlIOBase_eof,
2693 PerlIOBase_error,
2694 PerlIOBase_clearerr,
2695 PerlIOBase_setlinebuf,
2696 PerlIOBuf_get_base,
2697 PerlIOBuf_bufsiz,
2698 PerlIOBuf_get_ptr,
2699 PerlIOBuf_get_cnt,
2700 PerlIOBuf_set_ptrcnt,
2701};
2702
2703/*****************************************************************************/
2704/* Coro::Semaphore & Coro::Signal */
2705
2706static SV *
2707coro_waitarray_new (pTHX_ int count)
2708{
2709 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2710 AV *av = newAV ();
2711 SV **ary;
2712
2713 /* unfortunately, building manually saves memory */
2714 Newx (ary, 2, SV *);
2715 AvALLOC (av) = ary;
2716#if PERL_VERSION_ATLEAST (5,10,0)
2717 AvARRAY (av) = ary;
2718#else
2719 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2720 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2721 SvPVX ((SV *)av) = (char *)ary;
2722#endif
2723 AvMAX (av) = 1;
2724 AvFILLp (av) = 0;
2725 ary [0] = newSViv (count);
2726
2727 return newRV_noinc ((SV *)av);
2728}
2729
2730/* semaphore */
2731
2732static void
2733coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2734{
2735 SV *count_sv = AvARRAY (av)[0];
2736 IV count = SvIVX (count_sv);
2737
2738 count += adjust;
2739 SvIVX (count_sv) = count;
2740
2741 /* now wake up as many waiters as are expected to lock */
2742 while (count > 0 && AvFILLp (av) > 0)
2743 {
2744 SV *cb;
2745
2746 /* swap first two elements so we can shift a waiter */
2747 AvARRAY (av)[0] = AvARRAY (av)[1];
2748 AvARRAY (av)[1] = count_sv;
2749 cb = av_shift (av);
2750
2751 if (SvOBJECT (cb))
2752 {
2753 api_ready (aTHX_ cb);
2754 --count;
2755 }
2756 else if (SvTYPE (cb) == SVt_PVCV)
2757 {
2758 dSP;
2759 PUSHMARK (SP);
2760 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2761 PUTBACK;
2762 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2763 }
2764
2765 SvREFCNT_dec (cb);
2766 }
2767}
2768
2769static void
2770coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2771{
2772 /* call $sem->adjust (0) to possibly wake up some other waiters */
2773 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2774}
2775
2776static int
2777slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2778{
2779 AV *av = (AV *)frame->data;
2780 SV *count_sv = AvARRAY (av)[0];
2781
2782 /* if we are about to throw, don't actually acquire the lock, just throw */
2783 if (CORO_THROW)
2784 return 0;
2785 else if (SvIVX (count_sv) > 0)
2786 {
2787 SvSTATE_current->on_destroy = 0;
2788
2789 if (acquire)
2790 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2791 else
2792 coro_semaphore_adjust (aTHX_ av, 0);
2793
2794 return 0;
2795 }
2796 else
2797 {
2798 int i;
2799 /* if we were woken up but can't down, we look through the whole */
2800 /* waiters list and only add us if we aren't in there already */
2801 /* this avoids some degenerate memory usage cases */
2802
2803 for (i = 1; i <= AvFILLp (av); ++i)
2804 if (AvARRAY (av)[i] == SvRV (coro_current))
2805 return 1;
2806
2807 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2808 return 1;
2809 }
2810}
2811
2812static int
2813slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2814{
2815 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2816}
2817
2818static int
2819slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2820{
2821 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2822}
2823
2824static void
2825slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2826{
2827 AV *av = (AV *)SvRV (arg [0]);
2828
2829 if (SvIVX (AvARRAY (av)[0]) > 0)
2830 {
2831 frame->data = (void *)av;
2832 frame->prepare = prepare_nop;
2833 }
2834 else
2835 {
2836 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2837
2838 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2839 frame->prepare = prepare_schedule;
2840
2841 /* to avoid race conditions when a woken-up coro gets terminated */
2842 /* we arrange for a temporary on_destroy that calls adjust (0) */
2843 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2844 }
2845}
2846
2847static void
2848slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2849{
2850 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2851 frame->check = slf_check_semaphore_down;
2852}
2853
2854static void
2855slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2856{
2857 if (items >= 2)
2858 {
2859 /* callback form */
2860 AV *av = (AV *)SvRV (arg [0]);
2861 SV *cb_cv = s_get_cv_croak (arg [1]);
2862
2863 av_push (av, SvREFCNT_inc_NN (cb_cv));
2864
2865 if (SvIVX (AvARRAY (av)[0]) > 0)
2866 coro_semaphore_adjust (aTHX_ av, 0);
2867
2868 frame->prepare = prepare_nop;
2869 frame->check = slf_check_nop;
2870 }
2871 else
2872 {
2873 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2874 frame->check = slf_check_semaphore_wait;
2875 }
2876}
2877
2878/* signal */
2879
2880static void
2881coro_signal_wake (pTHX_ AV *av, int count)
2882{
2883 SvIVX (AvARRAY (av)[0]) = 0;
2884
2885 /* now signal count waiters */
2886 while (count > 0 && AvFILLp (av) > 0)
2887 {
2888 SV *cb;
2889
2890 /* swap first two elements so we can shift a waiter */
2891 cb = AvARRAY (av)[0];
2892 AvARRAY (av)[0] = AvARRAY (av)[1];
2893 AvARRAY (av)[1] = cb;
2894
2895 cb = av_shift (av);
2896
2897 if (SvTYPE (cb) == SVt_PVCV)
2898 {
2899 dSP;
2900 PUSHMARK (SP);
2901 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2902 PUTBACK;
2903 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2904 }
2905 else
2906 {
2907 api_ready (aTHX_ cb);
2908 sv_setiv (cb, 0); /* signal waiter */
2909 }
2910
2911 SvREFCNT_dec (cb);
2912
2913 --count;
2914 }
2915}
2916
2917static int
2918slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2919{
2920 /* if we are about to throw, also stop waiting */
2921 return SvROK ((SV *)frame->data) && !CORO_THROW;
2922}
2923
2924static void
2925slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2926{
2927 AV *av = (AV *)SvRV (arg [0]);
2928
2929 if (items >= 2)
2930 {
2931 SV *cb_cv = s_get_cv_croak (arg [1]);
2932 av_push (av, SvREFCNT_inc_NN (cb_cv));
2933
2934 if (SvIVX (AvARRAY (av)[0]))
2935 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
2936
2937 frame->prepare = prepare_nop;
2938 frame->check = slf_check_nop;
2939 }
2940 else if (SvIVX (AvARRAY (av)[0]))
2941 {
2942 SvIVX (AvARRAY (av)[0]) = 0;
2943 frame->prepare = prepare_nop;
2944 frame->check = slf_check_nop;
2945 }
2946 else
2947 {
2948 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2949
2950 av_push (av, waiter);
2951
2952 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2953 frame->prepare = prepare_schedule;
2954 frame->check = slf_check_signal_wait;
2955 }
2956}
2957
2958/*****************************************************************************/
2959/* Coro::AIO */
2960
2961#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2962
2963/* helper storage struct */
2964struct io_state
2965{
2966 int errorno;
2967 I32 laststype; /* U16 in 5.10.0 */
2968 int laststatval;
2969 Stat_t statcache;
2970};
2971
2972static void
2973coro_aio_callback (pTHX_ CV *cv)
2974{
2975 dXSARGS;
2976 AV *state = (AV *)S_GENSUB_ARG;
2977 SV *coro = av_pop (state);
2978 SV *data_sv = newSV (sizeof (struct io_state));
2979
2980 av_extend (state, items - 1);
2981
2982 sv_upgrade (data_sv, SVt_PV);
2983 SvCUR_set (data_sv, sizeof (struct io_state));
2984 SvPOK_only (data_sv);
2985
2986 {
2987 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2988
2989 data->errorno = errno;
2990 data->laststype = PL_laststype;
2991 data->laststatval = PL_laststatval;
2992 data->statcache = PL_statcache;
2993 }
2994
2995 /* now build the result vector out of all the parameters and the data_sv */
2996 {
2997 int i;
2998
2999 for (i = 0; i < items; ++i)
3000 av_push (state, SvREFCNT_inc_NN (ST (i)));
3001 }
3002
3003 av_push (state, data_sv);
3004
3005 api_ready (aTHX_ coro);
3006 SvREFCNT_dec (coro);
3007 SvREFCNT_dec ((AV *)state);
3008}
3009
3010static int
3011slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3012{
3013 AV *state = (AV *)frame->data;
3014
3015 /* if we are about to throw, return early */
3016 /* this does not cancel the aio request, but at least */
3017 /* it quickly returns */
3018 if (CORO_THROW)
3019 return 0;
3020
3021 /* one element that is an RV? repeat! */
3022 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3023 return 1;
3024
3025 /* restore status */
3026 {
3027 SV *data_sv = av_pop (state);
3028 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3029
3030 errno = data->errorno;
3031 PL_laststype = data->laststype;
3032 PL_laststatval = data->laststatval;
3033 PL_statcache = data->statcache;
3034
3035 SvREFCNT_dec (data_sv);
3036 }
3037
3038 /* push result values */
3039 {
3040 dSP;
3041 int i;
3042
3043 EXTEND (SP, AvFILLp (state) + 1);
3044 for (i = 0; i <= AvFILLp (state); ++i)
3045 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3046
3047 PUTBACK;
3048 }
905 3049
906 return 0; 3050 return 0;
907} 3051}
908 3052
909static void 3053static void
910api_ready (SV *coro) 3054slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
911{ 3055{
912 dTHX; 3056 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
913
914 if (SvROK (coro))
915 coro = SvRV (coro);
916
917 LOCK;
918 coro_enq (aTHX_ SvREFCNT_inc (coro));
919 UNLOCK;
920}
921
922static void
923api_schedule (void)
924{
925 dTHX;
926
927 SV *prev, *next;
928
929 LOCK;
930
931 prev = SvRV (GvSV (coro_current)); 3057 SV *coro_hv = SvRV (coro_current);
932 next = coro_deq (aTHX_ PRIO_MIN); 3058 struct coro *coro = SvSTATE_hv (coro_hv);
933 3059
934 if (!next) 3060 /* put our coroutine id on the state arg */
935 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 3061 av_push (state, SvREFCNT_inc_NN (coro_hv));
936 3062
937 /* free this only after the transfer */ 3063 /* first see whether we have a non-zero priority and set it as AIO prio */
938 coro_mortal = prev; 3064 if (coro->prio)
939 SV_CORO (prev, "Coro::schedule"); 3065 {
3066 dSP;
940 3067
941 SvRV (GvSV (coro_current)) = next; 3068 static SV *prio_cv;
3069 static SV *prio_sv;
942 3070
943 SV_CORO (next, "Coro::schedule"); 3071 if (expect_false (!prio_cv))
3072 {
3073 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3074 prio_sv = newSViv (0);
3075 }
944 3076
945 UNLOCK; 3077 PUSHMARK (SP);
3078 sv_setiv (prio_sv, coro->prio);
3079 XPUSHs (prio_sv);
946 3080
947 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 3081 PUTBACK;
948 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 3082 call_sv (prio_cv, G_VOID | G_DISCARD);
949} 3083 }
950 3084
951static void 3085 /* now call the original request */
952api_cede (void) 3086 {
953{ 3087 dSP;
954 dTHX; 3088 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3089 int i;
955 3090
956 LOCK; 3091 PUSHMARK (SP);
957 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
958 UNLOCK;
959 3092
960 api_schedule (); 3093 /* first push all args to the stack */
961} 3094 EXTEND (SP, items + 1);
962 3095
3096 for (i = 0; i < items; ++i)
3097 PUSHs (arg [i]);
3098
3099 /* now push the callback closure */
3100 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3101
3102 /* now call the AIO function - we assume our request is uncancelable */
3103 PUTBACK;
3104 call_sv ((SV *)req, G_VOID | G_DISCARD);
3105 }
3106
3107 /* now that the request is going, we loop till we have a result */
3108 frame->data = (void *)state;
3109 frame->prepare = prepare_schedule;
3110 frame->check = slf_check_aio_req;
3111}
3112
3113static void
3114coro_aio_req_xs (pTHX_ CV *cv)
3115{
3116 dXSARGS;
3117
3118 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3119
3120 XSRETURN_EMPTY;
3121}
3122
3123/*****************************************************************************/
3124
3125#if CORO_CLONE
3126# include "clone.c"
3127#endif
3128
3129/*****************************************************************************/
3130
3131static SV *
3132coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3133{
3134 SV *coro_sv;
3135 struct coro *coro;
3136 MAGIC *mg;
3137 HV *hv;
3138 SV *cb;
3139 int i;
3140
3141 if (argc > 0)
3142 {
3143 cb = s_get_cv_croak (argv [0]);
3144
3145 if (!is_coro)
3146 {
3147 if (CvISXSUB (cb))
3148 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3149
3150 if (!CvROOT (cb))
3151 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3152 }
3153 }
3154
3155 Newz (0, coro, 1, struct coro);
3156 coro->args = newAV ();
3157 coro->flags = CF_NEW;
3158
3159 if (coro_first) coro_first->prev = coro;
3160 coro->next = coro_first;
3161 coro_first = coro;
3162
3163 coro->hv = hv = newHV ();
3164 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3165 mg->mg_flags |= MGf_DUP;
3166 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3167
3168 if (argc > 0)
3169 {
3170 av_extend (coro->args, argc + is_coro - 1);
3171
3172 if (is_coro)
3173 {
3174 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3175 cb = (SV *)cv_coro_run;
3176 }
3177
3178 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3179
3180 for (i = 1; i < argc; i++)
3181 av_push (coro->args, newSVsv (argv [i]));
3182 }
3183
3184 return coro_sv;
3185}
3186
963MODULE = Coro::State PACKAGE = Coro::State 3187MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
964 3188
965PROTOTYPES: ENABLE 3189PROTOTYPES: DISABLE
966 3190
967BOOT: 3191BOOT:
968{ /* {} necessary for stoopid perl-5.6.x */ 3192{
969#ifdef USE_ITHREADS 3193#ifdef USE_ITHREADS
970 MUTEX_INIT (&coro_mutex); 3194# if CORO_PTHREAD
3195 coro_thx = PERL_GET_CONTEXT;
3196# endif
971#endif 3197#endif
3198 BOOT_PAGESIZE;
972 3199
973 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 3200 cctx_current = cctx_new_empty ();
974 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 3201
3202 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3203 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3204
3205 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3206 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3207 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3208
3209 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3210 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3211 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3212
975 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3213 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
976 3214
977 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3215 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
978 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3216 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
979 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3217 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
980 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 3218 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
981 3219
982 main_mainstack = PL_mainstack; 3220 main_mainstack = PL_mainstack;
3221 main_top_env = PL_top_env;
983 3222
3223 while (main_top_env->je_prev)
3224 main_top_env = main_top_env->je_prev;
3225
3226 {
3227 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3228
3229 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3230 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3231
3232 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3233 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3234 }
3235
984 coroapi.ver = CORO_API_VERSION; 3236 coroapi.ver = CORO_API_VERSION;
3237 coroapi.rev = CORO_API_REVISION;
3238
985 coroapi.transfer = api_transfer; 3239 coroapi.transfer = api_transfer;
986}
987 3240
988Coro::State 3241 coroapi.sv_state = SvSTATE_;
989_newprocess(args) 3242 coroapi.execute_slf = api_execute_slf;
990 SV * args 3243 coroapi.prepare_nop = prepare_nop;
991 PROTOTYPE: $ 3244 coroapi.prepare_schedule = prepare_schedule;
3245 coroapi.prepare_cede = prepare_cede;
3246 coroapi.prepare_cede_notself = prepare_cede_notself;
3247
3248 time_init (aTHX);
3249
3250 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3251}
3252
3253SV *
3254new (SV *klass, ...)
3255 ALIAS:
3256 Coro::new = 1
992 CODE: 3257 CODE:
993 Coro__State coro; 3258 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
994 3259 OUTPUT:
995 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
996 croak ("Coro::State::_newprocess expects an arrayref");
997
998 Newz (0, coro, 1, struct coro);
999
1000 coro->args = (AV *)SvREFCNT_inc (SvRV (args));
1001 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1002 /*coro->stack = 0;*/
1003
1004 /* same as JMPENV_BOOTSTRAP */
1005 /* we might be able to recycle start_env, but safe is safe */
1006 /*Zero(&coro->start_env, 1, JMPENV);*/
1007 coro->start_env.je_ret = -1;
1008 coro->start_env.je_mustcatch = TRUE;
1009
1010 RETVAL = coro;
1011 OUTPUT:
1012 RETVAL 3260 RETVAL
1013 3261
1014void 3262void
1015transfer(prev, next, flags) 3263transfer (...)
1016 SV *prev
1017 SV *next
1018 int flags
1019 PROTOTYPE: @ 3264 PROTOTYPE: $$
1020 CODE: 3265 CODE:
1021 PUTBACK; 3266 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1022 SV_CORO (next, "Coro::transfer");
1023 SV_CORO (prev, "Coro::transfer");
1024 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
1025 SPAGAIN;
1026 3267
1027void 3268void
1028DESTROY(coro)
1029 Coro::State coro
1030 CODE:
1031
1032 if (coro->mainstack && coro->mainstack != main_mainstack)
1033 {
1034 struct coro temp;
1035
1036 PUTBACK;
1037 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1038 LOAD (aTHX_ coro);
1039 SPAGAIN;
1040
1041 destroy_stacks (aTHX);
1042
1043 LOAD ((&temp)); /* this will get rid of defsv etc.. */
1044 SPAGAIN;
1045
1046 coro->mainstack = 0;
1047 }
1048
1049 deallocate_stack (coro);
1050 SvREFCNT_dec (coro->args);
1051 Safefree (coro);
1052
1053void
1054_exit(code) 3269_exit (int code)
1055 int code
1056 PROTOTYPE: $ 3270 PROTOTYPE: $
1057 CODE: 3271 CODE:
1058 _exit (code); 3272 _exit (code);
1059 3273
1060MODULE = Coro::State PACKAGE = Coro::Cont 3274SV *
3275clone (Coro::State coro)
3276 CODE:
3277{
3278#if CORO_CLONE
3279 struct coro *ncoro = coro_clone (aTHX_ coro);
3280 MAGIC *mg;
3281 /* TODO: too much duplication */
3282 ncoro->hv = newHV ();
3283 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3284 mg->mg_flags |= MGf_DUP;
3285 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3286#else
3287 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3288#endif
3289}
3290 OUTPUT:
3291 RETVAL
1061 3292
1062# this is slightly dirty (should expose a c-level api) 3293int
3294cctx_stacksize (int new_stacksize = 0)
3295 PROTOTYPE: ;$
3296 CODE:
3297 RETVAL = cctx_stacksize;
3298 if (new_stacksize)
3299 {
3300 cctx_stacksize = new_stacksize;
3301 ++cctx_gen;
3302 }
3303 OUTPUT:
3304 RETVAL
3305
3306int
3307cctx_max_idle (int max_idle = 0)
3308 PROTOTYPE: ;$
3309 CODE:
3310 RETVAL = cctx_max_idle;
3311 if (max_idle > 1)
3312 cctx_max_idle = max_idle;
3313 OUTPUT:
3314 RETVAL
3315
3316int
3317cctx_count ()
3318 PROTOTYPE:
3319 CODE:
3320 RETVAL = cctx_count;
3321 OUTPUT:
3322 RETVAL
3323
3324int
3325cctx_idle ()
3326 PROTOTYPE:
3327 CODE:
3328 RETVAL = cctx_idle;
3329 OUTPUT:
3330 RETVAL
1063 3331
1064void 3332void
1065yield(...) 3333list ()
1066 PROTOTYPE: @ 3334 PROTOTYPE:
3335 PPCODE:
3336{
3337 struct coro *coro;
3338 for (coro = coro_first; coro; coro = coro->next)
3339 if (coro->hv)
3340 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3341}
3342
3343void
3344call (Coro::State coro, SV *coderef)
3345 ALIAS:
3346 eval = 1
3347 CODE:
3348{
3349 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3350 {
3351 struct coro *current = SvSTATE_current;
3352 struct CoroSLF slf_save;
3353
3354 if (current != coro)
3355 {
3356 PUTBACK;
3357 save_perl (aTHX_ current);
3358 load_perl (aTHX_ coro);
3359 /* the coro is most likely in an active SLF call.
3360 * while not strictly required (the code we execute is
3361 * not allowed to call any SLF functions), it's cleaner
3362 * to reinitialise the slf_frame and restore it later.
3363 * This might one day allow us to actually do SLF calls
3364 * from code executed here.
3365 */
3366 slf_save = slf_frame;
3367 slf_frame.prepare = 0;
3368 SPAGAIN;
3369 }
3370
3371 PUSHSTACK;
3372
3373 PUSHMARK (SP);
3374 PUTBACK;
3375
3376 if (ix)
3377 eval_sv (coderef, 0);
3378 else
3379 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3380
3381 POPSTACK;
3382 SPAGAIN;
3383
3384 if (current != coro)
3385 {
3386 PUTBACK;
3387 slf_frame = slf_save;
3388 save_perl (aTHX_ coro);
3389 load_perl (aTHX_ current);
3390 SPAGAIN;
3391 }
3392 }
3393}
3394
3395SV *
3396is_ready (Coro::State coro)
3397 PROTOTYPE: $
3398 ALIAS:
3399 is_ready = CF_READY
3400 is_running = CF_RUNNING
3401 is_new = CF_NEW
3402 is_destroyed = CF_DESTROYED
3403 is_suspended = CF_SUSPENDED
3404 CODE:
3405 RETVAL = boolSV (coro->flags & ix);
3406 OUTPUT:
3407 RETVAL
3408
3409void
3410throw (Coro::State self, SV *exception = &PL_sv_undef)
3411 PROTOTYPE: $;$
1067 CODE: 3412 CODE:
1068 SV *yieldstack; 3413{
1069 SV *sv; 3414 struct coro *current = SvSTATE_current;
1070 AV *defav = GvAV (PL_defgv); 3415 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
1071 struct coro *prev, *next;
1072
1073 yieldstack = *hv_fetch (
1074 (HV *)SvRV (GvSV (coro_current)),
1075 "yieldstack", sizeof ("yieldstack") - 1,
1076 0
1077 );
1078
1079 /* set up @_ -- ugly */
1080 av_clear (defav);
1081 av_fill (defav, items - 1);
1082 while (items--)
1083 av_store (defav, items, SvREFCNT_inc (ST(items)));
1084
1085 sv = av_pop ((AV *)SvRV (yieldstack));
1086 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1087 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1088 SvREFCNT_dec (sv); 3416 SvREFCNT_dec (*exceptionp);
1089 3417 SvGETMAGIC (exception);
1090 transfer (aTHX_ prev, next, 0); 3418 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
1091
1092MODULE = Coro::State PACKAGE = Coro
1093
1094# this is slightly dirty (should expose a c-level api)
1095
1096BOOT:
1097{
1098 int i;
1099 HV *stash = gv_stashpv ("Coro", TRUE);
1100
1101 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1102 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1103 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1104 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1105 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1106 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1107
1108 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1109 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1110
1111 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1112 coro_ready[i] = newAV ();
1113
1114 {
1115 SV *sv = perl_get_sv("Coro::API", 1);
1116
1117 coroapi.schedule = api_schedule;
1118 coroapi.cede = api_cede;
1119 coroapi.ready = api_ready;
1120 coroapi.nready = &coro_nready;
1121 coroapi.current = coro_current;
1122
1123 GCoroAPI = &coroapi;
1124 sv_setiv(sv, (IV)&coroapi);
1125 SvREADONLY_on(sv);
1126 }
1127} 3419}
1128
1129#if !PERL_MICRO
1130 3420
1131void 3421void
1132ready(self) 3422api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1133 SV * self 3423 PROTOTYPE: $;$
3424 C_ARGS: aTHX_ coro, flags
3425
3426SV *
3427has_cctx (Coro::State coro)
1134 PROTOTYPE: $ 3428 PROTOTYPE: $
1135 CODE: 3429 CODE:
1136 api_ready (self); 3430 /* maybe manage the running flag differently */
1137 3431 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1138#endif 3432 OUTPUT:
3433 RETVAL
1139 3434
1140int 3435int
3436is_traced (Coro::State coro)
3437 PROTOTYPE: $
3438 CODE:
3439 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3440 OUTPUT:
3441 RETVAL
3442
3443UV
3444rss (Coro::State coro)
3445 PROTOTYPE: $
3446 ALIAS:
3447 usecount = 1
3448 CODE:
3449 switch (ix)
3450 {
3451 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3452 case 1: RETVAL = coro->usecount; break;
3453 }
3454 OUTPUT:
3455 RETVAL
3456
3457void
3458force_cctx ()
3459 PROTOTYPE:
3460 CODE:
3461 cctx_current->idle_sp = 0;
3462
3463void
3464swap_defsv (Coro::State self)
3465 PROTOTYPE: $
3466 ALIAS:
3467 swap_defav = 1
3468 CODE:
3469 if (!self->slot)
3470 croak ("cannot swap state with coroutine that has no saved state,");
3471 else
3472 {
3473 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3474 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3475
3476 SV *tmp = *src; *src = *dst; *dst = tmp;
3477 }
3478
3479void
3480cancel (Coro::State self)
3481 CODE:
3482 coro_state_destroy (aTHX_ self);
3483
3484SV *
3485enable_times (int enabled = enable_times)
3486 CODE:
3487{
3488 RETVAL = boolSV (enable_times);
3489
3490 if (enabled != enable_times)
3491 {
3492 enable_times = enabled;
3493
3494 coro_times_update ();
3495 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3496 }
3497}
3498 OUTPUT:
3499 RETVAL
3500
3501void
3502times (Coro::State self)
3503 PPCODE:
3504{
3505 struct coro *current = SvSTATE (coro_current);
3506
3507 if (expect_false (current == self))
3508 {
3509 coro_times_update ();
3510 coro_times_add (SvSTATE (coro_current));
3511 }
3512
3513 EXTEND (SP, 2);
3514 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3515 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3516
3517 if (expect_false (current == self))
3518 coro_times_sub (SvSTATE (coro_current));
3519}
3520
3521void
3522swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3523 CODE:
3524{
3525 struct coro *current = SvSTATE_current;
3526
3527 if (current == coro)
3528 SWAP_SVS (current);
3529
3530 if (!coro->swap_sv)
3531 coro->swap_sv = newAV ();
3532
3533 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3534 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3535
3536 if (current == coro)
3537 SWAP_SVS (current);
3538}
3539
3540
3541MODULE = Coro::State PACKAGE = Coro
3542
3543BOOT:
3544{
3545 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3546 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3547 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3548 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3549 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3550 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3551 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3552 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3553 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3554
3555 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3556 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3557 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3558 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3559
3560 coro_stash = gv_stashpv ("Coro", TRUE);
3561
3562 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
3563 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
3564 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
3565 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
3566 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
3567 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
3568
3569 {
3570 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
3571
3572 coroapi.schedule = api_schedule;
3573 coroapi.schedule_to = api_schedule_to;
3574 coroapi.cede = api_cede;
3575 coroapi.cede_notself = api_cede_notself;
3576 coroapi.ready = api_ready;
3577 coroapi.is_ready = api_is_ready;
3578 coroapi.nready = coro_nready;
3579 coroapi.current = coro_current;
3580
3581 /*GCoroAPI = &coroapi;*/
3582 sv_setiv (sv, (IV)&coroapi);
3583 SvREADONLY_on (sv);
3584 }
3585}
3586
3587SV *
3588async (...)
3589 PROTOTYPE: &@
3590 CODE:
3591 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3592 api_ready (aTHX_ RETVAL);
3593 OUTPUT:
3594 RETVAL
3595
3596void
3597_destroy (Coro::State coro)
3598 CODE:
3599 /* used by the manager thread */
3600 coro_state_destroy (aTHX_ coro);
3601 coro_call_on_destroy (aTHX_ coro);
3602
3603void
3604terminate (...)
3605 CODE:
3606 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3607
3608void
3609cancel (...)
3610 CODE:
3611 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3612
3613void
3614schedule (...)
3615 CODE:
3616 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3617
3618void
3619schedule_to (...)
3620 CODE:
3621 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3622
3623void
3624cede_to (...)
3625 CODE:
3626 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3627
3628void
3629cede (...)
3630 CODE:
3631 CORO_EXECUTE_SLF_XS (slf_init_cede);
3632
3633void
3634cede_notself (...)
3635 CODE:
3636 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3637
3638void
3639_set_current (SV *current)
3640 PROTOTYPE: $
3641 CODE:
3642 SvREFCNT_dec (SvRV (coro_current));
3643 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3644
3645void
3646_set_readyhook (SV *hook)
3647 PROTOTYPE: $
3648 CODE:
3649 SvREFCNT_dec (coro_readyhook);
3650 SvGETMAGIC (hook);
3651 if (SvOK (hook))
3652 {
3653 coro_readyhook = newSVsv (hook);
3654 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3655 }
3656 else
3657 {
3658 coro_readyhook = 0;
3659 CORO_READYHOOK = 0;
3660 }
3661
3662int
3663prio (Coro::State coro, int newprio = 0)
3664 PROTOTYPE: $;$
3665 ALIAS:
3666 nice = 1
3667 CODE:
3668{
3669 RETVAL = coro->prio;
3670
3671 if (items > 1)
3672 {
3673 if (ix)
3674 newprio = coro->prio - newprio;
3675
3676 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
3677 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
3678
3679 coro->prio = newprio;
3680 }
3681}
3682 OUTPUT:
3683 RETVAL
3684
3685SV *
3686ready (SV *self)
3687 PROTOTYPE: $
3688 CODE:
3689 RETVAL = boolSV (api_ready (aTHX_ self));
3690 OUTPUT:
3691 RETVAL
3692
3693int
1141nready(...) 3694nready (...)
1142 PROTOTYPE: 3695 PROTOTYPE:
1143 CODE: 3696 CODE:
1144 RETVAL = coro_nready; 3697 RETVAL = coro_nready;
1145 OUTPUT: 3698 OUTPUT:
1146 RETVAL 3699 RETVAL
1147 3700
1148void 3701void
1149schedule(...) 3702suspend (Coro::State self)
1150 PROTOTYPE: 3703 PROTOTYPE: $
1151 CODE: 3704 CODE:
1152 api_schedule (); 3705 self->flags |= CF_SUSPENDED;
1153 3706
1154void 3707void
1155cede(...) 3708resume (Coro::State self)
1156 PROTOTYPE: 3709 PROTOTYPE: $
1157 CODE: 3710 CODE:
1158 api_cede (); 3711 self->flags &= ~CF_SUSPENDED;
1159 3712
1160# and these are hacks 3713void
3714_pool_handler (...)
3715 CODE:
3716 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3717
3718void
3719async_pool (SV *cv, ...)
3720 PROTOTYPE: &@
3721 PPCODE:
3722{
3723 HV *hv = (HV *)av_pop (av_async_pool);
3724 AV *av = newAV ();
3725 SV *cb = ST (0);
3726 int i;
3727
3728 av_extend (av, items - 2);
3729 for (i = 1; i < items; ++i)
3730 av_push (av, SvREFCNT_inc_NN (ST (i)));
3731
3732 if ((SV *)hv == &PL_sv_undef)
3733 {
3734 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3735 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3736 SvREFCNT_dec (sv);
3737 }
3738
3739 {
3740 struct coro *coro = SvSTATE_hv (hv);
3741
3742 assert (!coro->invoke_cb);
3743 assert (!coro->invoke_av);
3744 coro->invoke_cb = SvREFCNT_inc (cb);
3745 coro->invoke_av = av;
3746 }
3747
3748 api_ready (aTHX_ (SV *)hv);
3749
3750 if (GIMME_V != G_VOID)
3751 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3752 else
3753 SvREFCNT_dec (hv);
3754}
3755
1161SV * 3756SV *
1162_aio_get_state () 3757rouse_cb ()
3758 PROTOTYPE:
1163 CODE: 3759 CODE:
1164{ 3760 RETVAL = coro_new_rouse_cb (aTHX);
1165 struct {
1166 int errorno;
1167 int laststype;
1168 int laststatval;
1169 Stat_t statcache;
1170 } data;
1171
1172 data.errorno = errno;
1173 data.laststype = PL_laststype;
1174 data.laststatval = PL_laststatval;
1175 data.statcache = PL_statcache;
1176
1177 RETVAL = newSVpvn ((char *)&data, sizeof data);
1178}
1179 OUTPUT: 3761 OUTPUT:
1180 RETVAL 3762 RETVAL
1181 3763
1182void 3764void
1183_aio_set_state (char *data_) 3765rouse_wait (...)
3766 PROTOTYPE: ;$
3767 PPCODE:
3768 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3769
3770void
3771on_enter (SV *block)
3772 ALIAS:
3773 on_leave = 1
1184 PROTOTYPE: $ 3774 PROTOTYPE: &
1185 CODE: 3775 CODE:
1186{ 3776{
1187 struct { 3777 struct coro *coro = SvSTATE_current;
3778 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3779
3780 block = s_get_cv_croak (block);
3781
3782 if (!*avp)
3783 *avp = newAV ();
3784
3785 av_push (*avp, SvREFCNT_inc (block));
3786
3787 if (!ix)
3788 on_enterleave_call (aTHX_ block);
3789
3790 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3791 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3792 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3793}
3794
3795
3796MODULE = Coro::State PACKAGE = PerlIO::cede
3797
3798BOOT:
3799 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3800
3801
3802MODULE = Coro::State PACKAGE = Coro::Semaphore
3803
3804SV *
3805new (SV *klass, SV *count = 0)
3806 CODE:
3807{
3808 int semcnt = 1;
3809
3810 if (count)
3811 {
3812 SvGETMAGIC (count);
3813
3814 if (SvOK (count))
3815 semcnt = SvIV (count);
3816 }
3817
3818 RETVAL = sv_bless (
3819 coro_waitarray_new (aTHX_ semcnt),
3820 GvSTASH (CvGV (cv))
3821 );
3822}
3823 OUTPUT:
3824 RETVAL
3825
3826# helper for Coro::Channel and others
3827SV *
3828_alloc (int count)
3829 CODE:
3830 RETVAL = coro_waitarray_new (aTHX_ count);
3831 OUTPUT:
3832 RETVAL
3833
3834SV *
3835count (SV *self)
3836 CODE:
3837 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3838 OUTPUT:
3839 RETVAL
3840
3841void
3842up (SV *self, int adjust = 1)
3843 ALIAS:
3844 adjust = 1
3845 CODE:
3846 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3847
3848void
3849down (...)
3850 CODE:
3851 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3852
3853void
3854wait (...)
3855 CODE:
3856 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3857
3858void
3859try (SV *self)
3860 PPCODE:
3861{
3862 AV *av = (AV *)SvRV (self);
3863 SV *count_sv = AvARRAY (av)[0];
3864 IV count = SvIVX (count_sv);
3865
3866 if (count > 0)
3867 {
3868 --count;
3869 SvIVX (count_sv) = count;
3870 XSRETURN_YES;
3871 }
3872 else
3873 XSRETURN_NO;
3874}
3875
3876void
3877waiters (SV *self)
3878 PPCODE:
3879{
3880 AV *av = (AV *)SvRV (self);
3881 int wcount = AvFILLp (av) + 1 - 1;
3882
3883 if (GIMME_V == G_SCALAR)
3884 XPUSHs (sv_2mortal (newSViv (wcount)));
3885 else
3886 {
1188 int errorno; 3887 int i;
1189 int laststype; 3888 EXTEND (SP, wcount);
1190 int laststatval; 3889 for (i = 1; i <= wcount; ++i)
1191 Stat_t statcache; 3890 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1192 } *data = (void *)data_; 3891 }
1193
1194 errno = data->errorno;
1195 PL_laststype = data->laststype;
1196 PL_laststatval = data->laststatval;
1197 PL_statcache = data->statcache;
1198} 3892}
3893
3894MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3895
3896void
3897_may_delete (SV *sem, int count, int extra_refs)
3898 PPCODE:
3899{
3900 AV *av = (AV *)SvRV (sem);
3901
3902 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3903 && AvFILLp (av) == 0 /* no waiters, just count */
3904 && SvIV (AvARRAY (av)[0]) == count)
3905 XSRETURN_YES;
3906
3907 XSRETURN_NO;
3908}
3909
3910MODULE = Coro::State PACKAGE = Coro::Signal
3911
3912SV *
3913new (SV *klass)
3914 CODE:
3915 RETVAL = sv_bless (
3916 coro_waitarray_new (aTHX_ 0),
3917 GvSTASH (CvGV (cv))
3918 );
3919 OUTPUT:
3920 RETVAL
3921
3922void
3923wait (...)
3924 CODE:
3925 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3926
3927void
3928broadcast (SV *self)
3929 CODE:
3930{
3931 AV *av = (AV *)SvRV (self);
3932 coro_signal_wake (aTHX_ av, AvFILLp (av));
3933}
3934
3935void
3936send (SV *self)
3937 CODE:
3938{
3939 AV *av = (AV *)SvRV (self);
3940
3941 if (AvFILLp (av))
3942 coro_signal_wake (aTHX_ av, 1);
3943 else
3944 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3945}
3946
3947IV
3948awaited (SV *self)
3949 CODE:
3950 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3951 OUTPUT:
3952 RETVAL
3953
3954
3955MODULE = Coro::State PACKAGE = Coro::AnyEvent
3956
3957BOOT:
3958 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3959
3960void
3961_schedule (...)
3962 CODE:
3963{
3964 static int incede;
3965
3966 api_cede_notself (aTHX);
3967
3968 ++incede;
3969 while (coro_nready >= incede && api_cede (aTHX))
3970 ;
3971
3972 sv_setsv (sv_activity, &PL_sv_undef);
3973 if (coro_nready >= incede)
3974 {
3975 PUSHMARK (SP);
3976 PUTBACK;
3977 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3978 }
3979
3980 --incede;
3981}
3982
3983
3984MODULE = Coro::State PACKAGE = Coro::AIO
3985
3986void
3987_register (char *target, char *proto, SV *req)
3988 CODE:
3989{
3990 SV *req_cv = s_get_cv_croak (req);
3991 /* newXSproto doesn't return the CV on 5.8 */
3992 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3993 sv_setpv ((SV *)slf_cv, proto);
3994 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3995}
3996
3997MODULE = Coro::State PACKAGE = Coro::Select
3998
3999void
4000patch_pp_sselect ()
4001 CODE:
4002 if (!coro_old_pp_sselect)
4003 {
4004 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4005 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4006 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4007 }
4008
4009void
4010unpatch_pp_sselect ()
4011 CODE:
4012 if (coro_old_pp_sselect)
4013 {
4014 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4015 coro_old_pp_sselect = 0;
4016 }
4017

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