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Comparing Coro/Coro/State.xs (file contents):
Revision 1.26 by root, Fri Aug 17 01:45:39 2001 UTC vs.
Revision 1.431 by root, Fri Feb 8 22:29:18 2013 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1 /* perl usually disables NDEBUG later */
5
6#include "libcoro/coro.c"
7
8#define PERL_NO_GET_CONTEXT
9#define PERL_EXT
10
1#include "EXTERN.h" 11#include "EXTERN.h"
2#include "perl.h" 12#include "perl.h"
3#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
4 15
5#include "libcoro/coro.c" 16#include "schmorp.h"
6 17
7#include <signal.h> 18#define ECB_NO_THREADS 1
19#include "ecb.h"
8 20
9#ifdef HAVE_MMAP 21#include <stddef.h>
10# include <unistd.h> 22#include <stdio.h>
11# include <sys/mman.h> 23#include <errno.h>
12# ifndef MAP_ANON 24#include <assert.h>
13# ifdef MAP_ANONYMOUS 25
14# define MAP_ANON MAP_ANONYMOUS 26#ifndef SVs_PADSTALE
27# define SVs_PADSTALE 0
28#endif
29
30#ifdef PadARRAY
31# define NEWPADAPI
32# define newPADLIST(var) (Newz (0, var, 1, PADLIST), Newx (PadlistARRAY (var), 2, PAD *))
15# else 33#else
16# undef HAVE_MMAP 34typedef AV PADNAMELIST;
35# if !PERL_VERSION_ATLEAST(5,8,0)
36typedef AV PADLIST;
37typedef AV PAD;
17# endif 38# endif
39# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
40# define PadlistMAX(pl) AvFILLp (pl)
41# define PadlistNAMES(pl) (*PadlistARRAY (pl))
42# define PadARRAY AvARRAY
43# define PadMAX AvFILLp
44# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
45#endif
46
47#if defined(_WIN32)
48# undef HAS_GETTIMEOFDAY
49# undef setjmp
50# undef longjmp
51# undef _exit
52# define setjmp _setjmp /* deep magic */
53#else
54# include <inttypes.h> /* most portable stdint.h */
55#endif
56
57/* the maximum number of idle cctx that will be pooled */
58static int cctx_max_idle = 4;
59
60#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
61# define HAS_SCOPESTACK_NAME 1
62#endif
63
64/* prefer perl internal functions over our own? */
65#ifndef CORO_PREFER_PERL_FUNCTIONS
66# define CORO_PREFER_PERL_FUNCTIONS 0
67#endif
68
69/* The next macros try to return the current stack pointer, in an as
70 * portable way as possible. */
71#if __GNUC__ >= 4
72# define dSTACKLEVEL int stacklevel_dummy
73# define STACKLEVEL __builtin_frame_address (0)
74#else
75# define dSTACKLEVEL volatile void *stacklevel
76# define STACKLEVEL ((void *)&stacklevel)
77#endif
78
79#define IN_DESTRUCT PL_dirty
80
81#include "CoroAPI.h"
82#define GCoroAPI (&coroapi) /* very sneaky */
83
84#ifdef USE_ITHREADS
85# if CORO_PTHREAD
86static void *coro_thx;
18# endif 87# endif
19#endif 88#endif
20 89
21#define MAY_FLUSH /* increases codesize */ 90#ifdef __linux
91# include <time.h> /* for timespec */
92# include <syscall.h> /* for SYS_* */
93# ifdef SYS_clock_gettime
94# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
95# define CORO_CLOCK_MONOTONIC 1
96# define CORO_CLOCK_THREAD_CPUTIME_ID 3
97# endif
98#endif
22 99
23#define SUB_INIT "Coro::State::initialize" 100static double (*nvtime)(); /* so why doesn't it take void? */
24#define UCORO_STATE "_coro_state" 101static void (*u2time)(pTHX_ UV ret[2]);
25 102
26/* The next macro should delcare a variable stacklevel that contains and approximation 103/* we hijack an hopefully unused CV flag for our purposes */
27 * to the current C stack pointer. Its property is that it changes with each call 104#define CVf_SLF 0x4000
28 * and should be unique. */ 105static OP *pp_slf (pTHX);
29#define dSTACKLEVEL void *stacklevel = &stacklevel 106static void slf_destroy (pTHX_ struct coro *coro);
30 107
31#define labs(l) ((l) >= 0 ? (l) : -(l)) 108static U32 cctx_gen;
32 109static size_t cctx_stacksize = CORO_STACKSIZE;
33#include "CoroAPI.h"
34
35static struct CoroAPI coroapi; 110static struct CoroAPI coroapi;
111static AV *main_mainstack; /* used to differentiate between $main and others */
112static JMPENV *main_top_env;
113static HV *coro_state_stash, *coro_stash;
114static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
36 115
37/* this is actually not only the c stack but also c registers etc... */ 116static AV *av_destroy; /* destruction queue */
117static SV *sv_manager; /* the manager coro */
118static SV *sv_idle; /* $Coro::idle */
119
120static GV *irsgv; /* $/ */
121static GV *stdoutgv; /* *STDOUT */
122static SV *rv_diehook;
123static SV *rv_warnhook;
124static HV *hv_sig; /* %SIG */
125
126/* async_pool helper stuff */
127static SV *sv_pool_rss;
128static SV *sv_pool_size;
129static SV *sv_async_pool_idle; /* description string */
130static AV *av_async_pool; /* idle pool */
131static SV *sv_Coro; /* class string */
132static CV *cv_pool_handler;
133
134/* Coro::AnyEvent */
135static SV *sv_activity;
136
137/* enable processtime/realtime profiling */
138static char enable_times;
139typedef U32 coro_ts[2];
140static coro_ts time_real, time_cpu;
141static char times_valid;
142
143static struct coro_cctx *cctx_first;
144static int cctx_count, cctx_idle;
145
146enum
147{
148 CC_MAPPED = 0x01,
149 CC_NOREUSE = 0x02, /* throw this away after tracing */
150 CC_TRACE = 0x04,
151 CC_TRACE_SUB = 0x08, /* trace sub calls */
152 CC_TRACE_LINE = 0x10, /* trace each statement */
153 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
154};
155
156/* this is a structure representing a c-level coroutine */
38typedef struct { 157typedef struct coro_cctx
39 int refcnt; /* pointer reference counter */ 158{
40 int usecnt; /* shared by how many coroutines */ 159 struct coro_cctx *next;
41 int gencnt; /* generation counter */
42 160
161 /* the stack */
162 struct coro_stack stack;
163
164 /* cpu state */
165 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
166#ifndef NDEBUG
167 JMPENV *idle_te; /* same as idle_sp, but for top_env */
168#endif
169 JMPENV *top_env;
43 coro_context cctx; 170 coro_context cctx;
44 171
45 void *sptr; 172 U32 gen;
46 long ssize; /* positive == mmap, otherwise malloc */ 173#if CORO_USE_VALGRIND
47} coro_stack; 174 int valgrind_id;
175#endif
176 unsigned char flags;
177} coro_cctx;
48 178
179static coro_cctx *cctx_current; /* the currently running cctx */
180
181/*****************************************************************************/
182
183static MGVTBL coro_state_vtbl;
184
185enum
186{
187 CF_RUNNING = 0x0001, /* coroutine is running */
188 CF_READY = 0x0002, /* coroutine is ready */
189 CF_NEW = 0x0004, /* has never been switched to */
190 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
191 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
192 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
193};
194
195/* the structure where most of the perl state is stored, overlaid on the cxstack */
196typedef struct
197{
198 #define VARx(name,expr,type) type name;
199 #include "state.h"
200} perl_slots;
201
202/* how many context stack entries do we need for perl_slots */
203#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
204
205/* this is a structure representing a perl-level coroutine */
49struct coro { 206struct coro
50 /* the optional C context */ 207{
51 coro_stack *stack; 208 /* the C coroutine allocated to this perl coroutine, if any */
52 void *cursp; 209 coro_cctx *cctx;
53 int gencnt;
54 210
55 /* optionally saved, might be zero */ 211 /* ready queue */
56 AV *defav; 212 struct coro *next_ready;
57 SV *defsv;
58 SV *errsv;
59
60 /* saved global state not related to stacks */
61 U8 dowarn;
62 I32 in_eval;
63 213
64 /* the stacks and related info (callchain etc..) */ 214 /* state data */
65 PERL_SI *curstackinfo; 215 struct CoroSLF slf_frame; /* saved slf frame */
66 AV *curstack;
67 AV *mainstack; 216 AV *mainstack;
68 SV **stack_sp; 217 perl_slots *slot; /* basically the saved sp */
69 OP *op;
70 SV **curpad;
71 SV **stack_base;
72 SV **stack_max;
73 SV **tmps_stack;
74 I32 tmps_floor;
75 I32 tmps_ix;
76 I32 tmps_max;
77 I32 *markstack;
78 I32 *markstack_ptr;
79 I32 *markstack_max;
80 I32 *scopestack;
81 I32 scopestack_ix;
82 I32 scopestack_max;
83 ANY *savestack;
84 I32 savestack_ix;
85 I32 savestack_max;
86 OP **retstack;
87 I32 retstack_ix;
88 I32 retstack_max;
89 COP *curcop;
90 JMPENV *top_env;
91 218
219 CV *startcv; /* the CV to execute */
92 /* data associated with this coroutine (initial args) */ 220 AV *args; /* data associated with this coroutine (initial args) */
93 AV *args; 221 int flags; /* CF_ flags */
222 HV *hv; /* the perl hash associated with this coro, if any */
223
224 /* statistics */
225 int usecount; /* number of transfers to this coro */
226
227 /* coro process data */
228 int prio;
229 SV *except; /* exception to be thrown */
230 SV *rouse_cb; /* last rouse callback */
231 AV *on_destroy; /* callbacks or coros to notify on destroy */
232 AV *status; /* the exit status list */
233
234 /* async_pool */
235 SV *saved_deffh;
236 SV *invoke_cb;
237 AV *invoke_av;
238
239 /* on_enter/on_leave */
240 AV *on_enter;
241 AV *on_leave;
242
243 /* swap_sv */
244 AV *swap_sv;
245
246 /* times */
247 coro_ts t_cpu, t_real;
248
249 /* linked list */
250 struct coro *next, *prev;
94}; 251};
95 252
96typedef struct coro *Coro__State; 253typedef struct coro *Coro__State;
97typedef struct coro *Coro__State_or_hashref; 254typedef struct coro *Coro__State_or_hashref;
98 255
99static AV *main_mainstack; /* used to differentiate between $main and others */ 256/* the following variables are effectively part of the perl context */
100static HV *coro_state_stash; 257/* and get copied between struct coro and these variables */
258/* the main reason we don't support windows process emulation */
259static struct CoroSLF slf_frame; /* the current slf frame */
260
261/** Coro ********************************************************************/
262
263#define CORO_PRIO_MAX 3
264#define CORO_PRIO_HIGH 1
265#define CORO_PRIO_NORMAL 0
266#define CORO_PRIO_LOW -1
267#define CORO_PRIO_IDLE -3
268#define CORO_PRIO_MIN -4
269
270/* for Coro.pm */
271static SV *coro_current;
272static SV *coro_readyhook;
273static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
274static CV *cv_coro_run;
275static struct coro *coro_first;
276#define coro_nready coroapi.nready
277
278/** JIT *********************************************************************/
279
280#if CORO_JIT
281 /* APPLE doesn't have mmap though */
282 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
283 #ifndef CORO_JIT_TYPE
284 #if ECB_AMD64 && CORO_JIT_UNIXY
285 #define CORO_JIT_TYPE "amd64-unix"
286 #elif __i386 && CORO_JIT_UNIXY
287 #define CORO_JIT_TYPE "x86-unix"
288 #endif
289 #endif
290#endif
291
292#if !defined(CORO_JIT_TYPE) || _POSIX_MEMORY_PROTECTION <= 0
293 #undef CORO_JIT
294#endif
295
296#if CORO_JIT
297 typedef void (*load_save_perl_slots_type)(perl_slots *);
298 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
299#endif
300
301/** Coro::Select ************************************************************/
302
303static OP *(*coro_old_pp_sselect) (pTHX);
101static SV *ucoro_state_sv; 304static SV *coro_select_select;
102static U32 ucoro_state_hash;
103static HV *padlist_cache;
104 305
105/* mostly copied from op.c:cv_clone2 */ 306/* horrible hack, but if it works... */
106STATIC AV * 307static OP *
107clone_padlist (AV *protopadlist) 308coro_pp_sselect (pTHX)
108{ 309{
109 AV *av; 310 dSP;
110 I32 ix; 311 PUSHMARK (SP - 4); /* fake argument list */
111 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 312 XPUSHs (coro_select_select);
112 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 313 PUTBACK;
113 SV **pname = AvARRAY (protopad_name); 314
114 SV **ppad = AvARRAY (protopad); 315 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
115 I32 fname = AvFILLp (protopad_name); 316 PL_op->op_flags |= OPf_STACKED;
116 I32 fpad = AvFILLp (protopad); 317 PL_op->op_private = 0;
117 AV *newpadlist, *newpad_name, *newpad; 318 return PL_ppaddr [OP_ENTERSUB](aTHX);
319}
320
321/** time stuff **************************************************************/
322
323#ifdef HAS_GETTIMEOFDAY
324
325ecb_inline 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
335ecb_inline double
336coro_nvtime (void)
337{
338 struct timeval tv;
339 gettimeofday (&tv, 0);
340
341 return tv.tv_sec + tv.tv_usec * 1e-6;
342}
343
344ecb_inline void
345time_init (pTHX)
346{
347 nvtime = coro_nvtime;
348 u2time = coro_u2time;
349}
350
351#else
352
353ecb_inline void
354time_init (pTHX)
355{
118 SV **npad; 356 SV **svp;
119 357
120 newpad_name = newAV (); 358 require_pv ("Time/HiRes.pm");
121 for (ix = fname; ix >= 0; ix--)
122 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
123 359
124 newpad = newAV (); 360 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
125 av_fill (newpad, AvFILLp (protopad));
126 npad = AvARRAY (newpad);
127 361
128 newpadlist = newAV (); 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 * ecb_noinline
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 * ecb_noinline
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 * ecb_noinline
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
405ecb_inline void
406coro_times_update (void)
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
428ecb_inline 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
440ecb_inline 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 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
460 ? SvMAGIC (sv) \
461 : mg_find (sv, type))
462
463#define CORO_MAGIC(sv, type) \
464 (ecb_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
471ecb_inline MAGIC *
472SvSTATEhv_p (pTHX_ SV *coro)
473{
474 MAGIC *mg;
475
476 if (ecb_expect_true (
477 SvTYPE (coro) == SVt_PVHV
478 && (mg = CORO_MAGIC_state (coro))
479 && mg->mg_virtual == &coro_state_vtbl
480 ))
481 return mg;
482
483 return 0;
484}
485
486ecb_inline struct coro *
487SvSTATE_ (pTHX_ SV *coro)
488{
489 MAGIC *mg;
490
491 if (SvROK (coro))
492 coro = SvRV (coro);
493
494 mg = SvSTATEhv_p (aTHX_ coro);
495 if (!mg)
496 croak ("Coro::State object required");
497
498 return (struct coro *)mg->mg_ptr;
499}
500
501#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
502
503/* faster than SvSTATE, but expects a coroutine hv */
504#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
505#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
506
507/*****************************************************************************/
508/* padlist management and caching */
509
510ecb_inline PADLIST *
511coro_derive_padlist (pTHX_ CV *cv)
512{
513 PADLIST *padlist = CvPADLIST (cv);
514 PADLIST *newpadlist;
515 PAD *newpad;
516 PADOFFSET const off = PadlistMAX (padlist) + 1;
517
518 newPADLIST(newpadlist);
519#if !PERL_VERSION_ATLEAST(5,15,3)
520 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
129 AvREAL_off (newpadlist); 521 AvREAL_off (newpadlist);
130 av_store (newpadlist, 0, (SV *) newpad_name); 522#endif
131 av_store (newpadlist, 1, (SV *) newpad); 523#if PERL_VERSION_ATLEAST (5,10,0)
524 Perl_pad_push (aTHX_ padlist, off);
525#else
526 Perl_pad_push (aTHX_ padlist, off, 1);
527#endif
528 newpad = PadlistARRAY (padlist)[off];
529 PadlistMAX (padlist) = off - 1;
132 530
133 av = newAV (); /* will be @_ */ 531 /* Already extended to 2 elements by newPADLIST. */
134 av_extend (av, 0); 532 PadlistMAX (newpadlist) = 1;
135 av_store (newpad, 0, (SV *) av); 533 PadlistNAMES (newpadlist) = (PADNAMELIST *)SvREFCNT_inc_NN (PadlistNAMES (padlist));
136 AvFLAGS (av) = AVf_REIFY; 534 PadlistARRAY (newpadlist)[1] = newpad;
137 535
138 for (ix = fpad; ix > 0; ix--) 536 return newpadlist;
537}
538
539ecb_inline void
540free_padlist (pTHX_ PADLIST *padlist)
541{
542 /* may be during global destruction */
543 if (!IN_DESTRUCT)
139 { 544 {
140 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 545 I32 i = PadlistMAX (padlist);
141 if (namesv && namesv != &PL_sv_undef) 546
547 while (i > 0) /* special-case index 0 */
142 { 548 {
143 char *name = SvPVX (namesv); /* XXX */ 549 /* we try to be extra-careful here */
144 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 550 PAD *pad = PadlistARRAY (padlist)[i--];
145 { /* lexical from outside? */ 551 I32 j = PadMAX (pad);
146 npad[ix] = SvREFCNT_inc (ppad[ix]); 552
147 } 553 while (j >= 0)
148 else 554 SvREFCNT_dec (PadARRAY (pad)[j--]);
149 { /* our own lexical */ 555
150 SV *sv; 556 PadMAX (pad) = -1;
151 if (*name == '&') 557 SvREFCNT_dec (pad);
152 sv = SvREFCNT_inc (ppad[ix]);
153 else if (*name == '@')
154 sv = (SV *) newAV ();
155 else if (*name == '%')
156 sv = (SV *) newHV ();
157 else
158 sv = NEWSV (0, 0);
159 if (!SvPADBUSY (sv))
160 SvPADMY_on (sv);
161 npad[ix] = sv;
162 }
163 } 558 }
164 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
165 {
166 npad[ix] = SvREFCNT_inc (ppad[ix]);
167 }
168 else
169 {
170 SV *sv = NEWSV (0, 0);
171 SvPADTMP_on (sv);
172 npad[ix] = sv;
173 }
174 }
175 559
176#if 0 /* return -ENOTUNDERSTOOD */ 560 SvREFCNT_dec (PadlistNAMES (padlist));
177 /* Now that vars are all in place, clone nested closures. */
178 561
179 for (ix = fpad; ix > 0; ix--) { 562#ifdef NEWPADAPI
180 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv; 563 Safefree (PadlistARRAY (padlist));
181 if (namesv 564 Safefree (padlist);
182 && namesv != &PL_sv_undef 565#else
183 && !(SvFLAGS(namesv) & SVf_FAKE) 566 AvFILLp (padlist) = -1;
184 && *SvPVX(namesv) == '&' 567 AvREAL_off (padlist);
185 && CvCLONE(ppad[ix])) 568 SvREFCNT_dec ((SV*)padlist);
186 {
187 CV *kid = cv_clone((CV*)ppad[ix]);
188 SvREFCNT_dec(ppad[ix]);
189 CvCLONE_on(kid);
190 SvPADMY_on(kid);
191 npad[ix] = (SV*)kid;
192 }
193 }
194#endif 569#endif
195 570 }
196 return newpadlist;
197} 571}
198 572
199#ifdef MAY_FLUSH 573static int
200STATIC AV * 574coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
201free_padlist (AV *padlist)
202{ 575{
203 /* may be during global destruction */ 576 PADLIST *padlist;
204 if (SvREFCNT(padlist)) 577 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
578 size_t len = *(size_t *)mg->mg_ptr;
579
580 /* perl manages to free our internal AV and _then_ call us */
581 if (IN_DESTRUCT)
582 return 0;
583
584 while (len--)
585 free_padlist (aTHX_ padlists[len]);
586
587 return 0;
588}
589
590static MGVTBL coro_cv_vtbl = {
591 0, 0, 0, 0,
592 coro_cv_free
593};
594
595/* the next two functions merely cache the padlists */
596ecb_inline void
597get_padlist (pTHX_ CV *cv)
598{
599 MAGIC *mg = CORO_MAGIC_cv (cv);
600 size_t *lenp;
601
602 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
603 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
604 else
205 { 605 {
206 I32 i = AvFILLp(padlist); 606#if CORO_PREFER_PERL_FUNCTIONS
207 while (i >= 0) 607 /* this is probably cleaner? but also slower! */
208 { 608 /* in practise, it seems to be less stable */
209 SV **svp = av_fetch(padlist, i--, FALSE); 609 CV *cp = Perl_cv_clone (aTHX_ cv);
210 SV *sv = svp ? *svp : Nullsv; 610 CvPADLIST (cv) = CvPADLIST (cp);
211 if (sv) 611 CvPADLIST (cp) = 0;
212 SvREFCNT_dec(sv); 612 SvREFCNT_dec (cp);
213 } 613#else
614 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
615#endif
616 }
617}
214 618
215 SvREFCNT_dec((SV*)padlist); 619ecb_inline void
620put_padlist (pTHX_ CV *cv)
621{
622 MAGIC *mg = CORO_MAGIC_cv (cv);
623
624 if (ecb_expect_false (!mg))
625 {
626 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
627 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
628 mg->mg_len = 1; /* so mg_free frees mg_ptr */
629 }
630 else
631 Renew (mg->mg_ptr,
632 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
633 char);
634
635 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
636}
637
638/** load & save, init *******************************************************/
639
640ecb_inline void
641swap_sv (SV *a, SV *b)
642{
643 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
644 SV tmp;
645
646 /* swap sv_any */
647 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
648
649 /* swap sv_flags */
650 SvFLAGS (&tmp) = SvFLAGS (a);
651 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
652 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
653
654#if PERL_VERSION_ATLEAST (5,10,0)
655 /* perl 5.10 and later complicates this _quite_ a bit, but it also
656 * is much faster, so no quarrels here. alternatively, we could
657 * sv_upgrade to avoid this.
658 */
659 {
660 /* swap sv_u */
661 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
662
663 /* if SvANY points to the head, we need to adjust the pointers,
664 * as the pointer for a still points to b, and maybe vice versa.
665 */
666 #define svany_in_head(type) \
667 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
668
669 if (svany_in_head (SvTYPE (a)))
670 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
671
672 if (svany_in_head (SvTYPE (b)))
673 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
216 } 674 }
217}
218#endif 675#endif
219
220/* the next two functions merely cache the padlists */
221STATIC void
222get_padlist (CV *cv)
223{
224 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
225
226 if (he && AvFILLp ((AV *)*he) >= 0)
227 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
228 else
229 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
230} 676}
231 677
232STATIC void 678/* swap sv heads, at least logically */
233put_padlist (CV *cv) 679static void
680swap_svs (pTHX_ Coro__State c)
234{ 681{
235 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1); 682 int i;
236 683
237 if (SvTYPE (*he) != SVt_PVAV) 684 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
238 { 685 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
239 SvREFCNT_dec (*he);
240 *he = (SV *)newAV ();
241 }
242
243 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
244} 686}
245 687
246#ifdef MAY_FLUSH 688#define SWAP_SVS(coro) \
247STATIC void 689 if (ecb_expect_false ((coro)->swap_sv)) \
248flush_padlist_cache () 690 swap_svs (aTHX_ (coro))
249{
250 HV *hv = padlist_cache;
251 padlist_cache = newHV ();
252 691
253 if (hv_iterinit (hv)) 692static void
254 { 693on_enterleave_call (pTHX_ SV *cb);
255 HE *he;
256 AV *padlist;
257 694
258 while (!!(he = hv_iternext (hv))) 695static void
259 { 696load_perl (pTHX_ Coro__State c)
260 AV *av = (AV *)HeVAL(he); 697{
698 perl_slots *slot = c->slot;
699 c->slot = 0;
261 700
262 /* casting is fun. */ 701 PL_mainstack = c->mainstack;
263 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
264 free_padlist (padlist);
265 }
266 }
267 702
268 SvREFCNT_dec (hv); 703#if CORO_JIT
269} 704 load_perl_slots (slot);
705#else
706 #define VARx(name,expr,type) expr = slot->name;
707 #include "state.h"
270#endif 708#endif
271
272#define SB do {
273#define SE } while (0)
274
275#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE
276#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE
277
278#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
279
280static void
281load_state(pTHX_ Coro__State c)
282{
283 PL_dowarn = c->dowarn;
284 PL_in_eval = c->in_eval;
285
286 PL_curstackinfo = c->curstackinfo;
287 PL_curstack = c->curstack;
288 PL_mainstack = c->mainstack;
289 PL_stack_sp = c->stack_sp;
290 PL_op = c->op;
291 PL_curpad = c->curpad;
292 PL_stack_base = c->stack_base;
293 PL_stack_max = c->stack_max;
294 PL_tmps_stack = c->tmps_stack;
295 PL_tmps_floor = c->tmps_floor;
296 PL_tmps_ix = c->tmps_ix;
297 PL_tmps_max = c->tmps_max;
298 PL_markstack = c->markstack;
299 PL_markstack_ptr = c->markstack_ptr;
300 PL_markstack_max = c->markstack_max;
301 PL_scopestack = c->scopestack;
302 PL_scopestack_ix = c->scopestack_ix;
303 PL_scopestack_max = c->scopestack_max;
304 PL_savestack = c->savestack;
305 PL_savestack_ix = c->savestack_ix;
306 PL_savestack_max = c->savestack_max;
307 PL_retstack = c->retstack;
308 PL_retstack_ix = c->retstack_ix;
309 PL_retstack_max = c->retstack_max;
310 PL_curcop = c->curcop;
311 PL_top_env = c->top_env;
312
313 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
314 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
315 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
316 709
317 { 710 {
318 dSP; 711 dSP;
712
319 CV *cv; 713 CV *cv;
320 714
321 /* now do the ugly restore mess */ 715 /* now do the ugly restore mess */
322 while ((cv = (CV *)POPs)) 716 while (ecb_expect_true (cv = (CV *)POPs))
323 { 717 {
324 AV *padlist = (AV *)POPs;
325
326 if (padlist)
327 {
328 put_padlist (cv); /* mark this padlist as available */ 718 put_padlist (aTHX_ cv); /* mark this padlist as available */
329 CvPADLIST(cv) = padlist; 719 CvDEPTH (cv) = PTR2IV (POPs);
330#ifdef USE_THREADS 720 CvPADLIST (cv) = (PADLIST *)POPs;
331 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
332#endif
333 }
334
335 ++CvDEPTH(cv);
336 } 721 }
337 722
338 PUTBACK; 723 PUTBACK;
339 } 724 }
340}
341 725
726 slf_frame = c->slf_frame;
727 CORO_THROW = c->except;
728
729 if (ecb_expect_false (enable_times))
730 {
731 if (ecb_expect_false (!times_valid))
732 coro_times_update ();
733
734 coro_times_sub (c);
735 }
736
737 if (ecb_expect_false (c->on_enter))
738 {
739 int i;
740
741 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
742 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
743 }
744
745 SWAP_SVS (c);
746}
747
342static void 748static void
343save_state(pTHX_ Coro__State c, int flags) 749save_perl (pTHX_ Coro__State c)
344{ 750{
751 SWAP_SVS (c);
752
753 if (ecb_expect_false (c->on_leave))
754 {
755 int i;
756
757 for (i = AvFILLp (c->on_leave); i >= 0; --i)
758 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
759 }
760
761 times_valid = 0;
762
763 if (ecb_expect_false (enable_times))
764 {
765 coro_times_update (); times_valid = 1;
766 coro_times_add (c);
767 }
768
769 c->except = CORO_THROW;
770 c->slf_frame = slf_frame;
771
345 { 772 {
346 dSP; 773 dSP;
347 I32 cxix = cxstack_ix; 774 I32 cxix = cxstack_ix;
348 PERL_CONTEXT *ccstk = cxstack; 775 PERL_CONTEXT *ccstk = cxstack;
349 PERL_SI *top_si = PL_curstackinfo; 776 PERL_SI *top_si = PL_curstackinfo;
… …
351 /* 778 /*
352 * the worst thing you can imagine happens first - we have to save 779 * the worst thing you can imagine happens first - we have to save
353 * (and reinitialize) all cv's in the whole callchain :( 780 * (and reinitialize) all cv's in the whole callchain :(
354 */ 781 */
355 782
356 PUSHs (Nullsv); 783 XPUSHs (Nullsv);
357 /* this loop was inspired by pp_caller */ 784 /* this loop was inspired by pp_caller */
358 for (;;) 785 for (;;)
359 { 786 {
360 do 787 while (ecb_expect_true (cxix >= 0))
361 { 788 {
362 PERL_CONTEXT *cx = &ccstk[cxix--]; 789 PERL_CONTEXT *cx = &ccstk[cxix--];
363 790
364 if (CxTYPE(cx) == CXt_SUB) 791 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
365 { 792 {
366 CV *cv = cx->blk_sub.cv; 793 CV *cv = cx->blk_sub.cv;
794
367 if (CvDEPTH(cv)) 795 if (ecb_expect_true (CvDEPTH (cv)))
368 { 796 {
369#ifdef USE_THREADS
370 /*XPUSHs ((SV *)CvOWNER(cv));*/
371 /*CvOWNER(cv) = 0;*/
372 /*error must unlock this cv etc.. etc...*/
373#endif
374 EXTEND (SP, CvDEPTH(cv)*2); 797 EXTEND (SP, 3);
375
376 while (--CvDEPTH(cv))
377 {
378 /* this tells the restore code to increment CvDEPTH */
379 PUSHs (Nullsv);
380 PUSHs ((SV *)cv);
381 }
382
383 PUSHs ((SV *)CvPADLIST(cv)); 798 PUSHs ((SV *)CvPADLIST (cv));
799 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
384 PUSHs ((SV *)cv); 800 PUSHs ((SV *)cv);
385 801
386 get_padlist (cv); /* this is a monster */ 802 CvDEPTH (cv) = 0;
803 get_padlist (aTHX_ cv);
387 } 804 }
388 } 805 }
389 else if (CxTYPE(cx) == CXt_FORMAT)
390 {
391 /* I never used formats, so how should I know how these are implemented? */
392 /* my bold guess is as a simple, plain sub... */
393 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
394 }
395 } 806 }
396 while (cxix >= 0);
397 807
398 if (top_si->si_type == PERLSI_MAIN) 808 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
399 break; 809 break;
400 810
401 top_si = top_si->si_prev; 811 top_si = top_si->si_prev;
402 ccstk = top_si->si_cxstack; 812 ccstk = top_si->si_cxstack;
403 cxix = top_si->si_cxix; 813 cxix = top_si->si_cxix;
404 } 814 }
405 815
406 PUTBACK; 816 PUTBACK;
407 } 817 }
408 818
409 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 819 /* allocate some space on the context stack for our purposes */
410 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 820 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
411 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 821 {
822 unsigned int i;
412 823
413 /* I have not the slightest idea of why av_reify is necessary */ 824 for (i = 0; i < SLOT_COUNT; ++i)
414 /* but if it's missing the defav contents magically get replaced sometimes */ 825 CXINC;
415 if (c->defav)
416 av_reify (c->defav);
417 826
418 c->dowarn = PL_dowarn; 827 cxstack_ix -= SLOT_COUNT; /* undo allocation */
419 c->in_eval = PL_in_eval; 828 }
420 829
421 c->curstackinfo = PL_curstackinfo;
422 c->curstack = PL_curstack;
423 c->mainstack = PL_mainstack; 830 c->mainstack = PL_mainstack;
424 c->stack_sp = PL_stack_sp; 831
425 c->op = PL_op; 832 {
426 c->curpad = PL_curpad; 833 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
427 c->stack_base = PL_stack_base; 834
428 c->stack_max = PL_stack_max; 835#if CORO_JIT
429 c->tmps_stack = PL_tmps_stack; 836 save_perl_slots (slot);
430 c->tmps_floor = PL_tmps_floor; 837#else
431 c->tmps_ix = PL_tmps_ix; 838 #define VARx(name,expr,type) slot->name = expr;
432 c->tmps_max = PL_tmps_max; 839 #include "state.h"
433 c->markstack = PL_markstack; 840#endif
434 c->markstack_ptr = PL_markstack_ptr; 841 }
435 c->markstack_max = PL_markstack_max;
436 c->scopestack = PL_scopestack;
437 c->scopestack_ix = PL_scopestack_ix;
438 c->scopestack_max = PL_scopestack_max;
439 c->savestack = PL_savestack;
440 c->savestack_ix = PL_savestack_ix;
441 c->savestack_max = PL_savestack_max;
442 c->retstack = PL_retstack;
443 c->retstack_ix = PL_retstack_ix;
444 c->retstack_max = PL_retstack_max;
445 c->curcop = PL_curcop;
446 c->top_env = PL_top_env;
447} 842}
448 843
449/* 844/*
450 * allocate various perl stacks. This is an exact copy 845 * allocate various perl stacks. This is almost an exact copy
451 * of perl.c:init_stacks, except that it uses less memory 846 * of perl.c:init_stacks, except that it uses less memory
452 * on the assumption that coroutines do not usually need 847 * on the (sometimes correct) assumption that coroutines do
453 * a lot of stackspace. 848 * not usually need a lot of stackspace.
454 */ 849 */
455STATIC void 850#if CORO_PREFER_PERL_FUNCTIONS
851# define coro_init_stacks(thx) init_stacks ()
852#else
853static void
456coro_init_stacks (pTHX) 854coro_init_stacks (pTHX)
457{ 855{
458 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 856 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
459 PL_curstackinfo->si_type = PERLSI_MAIN; 857 PL_curstackinfo->si_type = PERLSI_MAIN;
460 PL_curstack = PL_curstackinfo->si_stack; 858 PL_curstack = PL_curstackinfo->si_stack;
461 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 859 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
462 860
463 PL_stack_base = AvARRAY(PL_curstack); 861 PL_stack_base = AvARRAY(PL_curstack);
464 PL_stack_sp = PL_stack_base; 862 PL_stack_sp = PL_stack_base;
465 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 863 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
466 864
467 New(50,PL_tmps_stack,96,SV*); 865 New(50,PL_tmps_stack,32,SV*);
468 PL_tmps_floor = -1; 866 PL_tmps_floor = -1;
469 PL_tmps_ix = -1; 867 PL_tmps_ix = -1;
470 PL_tmps_max = 96; 868 PL_tmps_max = 32;
471 869
472 New(54,PL_markstack,16,I32); 870 New(54,PL_markstack,16,I32);
473 PL_markstack_ptr = PL_markstack; 871 PL_markstack_ptr = PL_markstack;
474 PL_markstack_max = PL_markstack + 16; 872 PL_markstack_max = PL_markstack + 16;
475 873
874#ifdef SET_MARK_OFFSET
476 SET_MARK_OFFSET; 875 SET_MARK_OFFSET;
876#endif
477 877
478 New(54,PL_scopestack,16,I32); 878 New(54,PL_scopestack,8,I32);
479 PL_scopestack_ix = 0; 879 PL_scopestack_ix = 0;
480 PL_scopestack_max = 16; 880 PL_scopestack_max = 8;
881#if HAS_SCOPESTACK_NAME
882 New(54,PL_scopestack_name,8,const char*);
883#endif
481 884
482 New(54,PL_savestack,96,ANY); 885 New(54,PL_savestack,24,ANY);
483 PL_savestack_ix = 0; 886 PL_savestack_ix = 0;
484 PL_savestack_max = 96; 887 PL_savestack_max = 24;
485 888
889#if !PERL_VERSION_ATLEAST (5,10,0)
486 New(54,PL_retstack,8,OP*); 890 New(54,PL_retstack,4,OP*);
487 PL_retstack_ix = 0; 891 PL_retstack_ix = 0;
488 PL_retstack_max = 8; 892 PL_retstack_max = 4;
893#endif
489} 894}
895#endif
490 896
491/* 897/*
492 * destroy the stacks, the callchain etc... 898 * destroy the stacks, the callchain etc...
493 * still there is a memleak of 128 bytes...
494 */ 899 */
495STATIC void 900static void
496destroy_stacks(pTHX) 901coro_destruct_stacks (pTHX)
497{ 902{
498 /* is this ugly, I ask? */
499 while (PL_scopestack_ix)
500 LEAVE;
501
502 /* sure it is, but more important: is it correct?? :/ */
503 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
504 FREETMPS;
505
506 while (PL_curstackinfo->si_next) 903 while (PL_curstackinfo->si_next)
507 PL_curstackinfo = PL_curstackinfo->si_next; 904 PL_curstackinfo = PL_curstackinfo->si_next;
508 905
509 while (PL_curstackinfo) 906 while (PL_curstackinfo)
510 { 907 {
511 PERL_SI *p = PL_curstackinfo->si_prev; 908 PERL_SI *p = PL_curstackinfo->si_prev;
512 909
513 { 910 if (!IN_DESTRUCT)
514 dSP;
515 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516 PUTBACK; /* possibly superfluous */
517 }
518
519 if (PL_main_cv != Nullcv) /* don't during destruction. hack? */
520 dounwind(-1);
521
522 SvREFCNT_dec(PL_curstackinfo->si_stack); 911 SvREFCNT_dec (PL_curstackinfo->si_stack);
912
523 Safefree(PL_curstackinfo->si_cxstack); 913 Safefree (PL_curstackinfo->si_cxstack);
524 Safefree(PL_curstackinfo); 914 Safefree (PL_curstackinfo);
525 PL_curstackinfo = p; 915 PL_curstackinfo = p;
526 } 916 }
527 917
528 Safefree(PL_tmps_stack); 918 Safefree (PL_tmps_stack);
529 Safefree(PL_markstack); 919 Safefree (PL_markstack);
530 Safefree(PL_scopestack); 920 Safefree (PL_scopestack);
921#if HAS_SCOPESTACK_NAME
531 Safefree(PL_savestack); 922 Safefree (PL_scopestack_name);
532 Safefree(PL_retstack);
533}
534
535static void
536allocate_stack (Coro__State ctx, int alloc)
537{
538 coro_stack *stack;
539
540 New (0, stack, 1, coro_stack);
541
542 stack->refcnt = 1;
543 stack->usecnt = 1;
544 stack->gencnt = ctx->gencnt = 0;
545 if (alloc)
546 {
547#ifdef HAVE_MMAP
548 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
549 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
550 if (stack->sptr == (void *)-1)
551#endif 923#endif
924 Safefree (PL_savestack);
925#if !PERL_VERSION_ATLEAST (5,10,0)
926 Safefree (PL_retstack);
927#endif
928}
929
930#define CORO_RSS \
931 rss += sizeof (SYM (curstackinfo)); \
932 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
933 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
934 rss += SYM (tmps_max) * sizeof (SV *); \
935 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
936 rss += SYM (scopestack_max) * sizeof (I32); \
937 rss += SYM (savestack_max) * sizeof (ANY);
938
939static size_t
940coro_rss (pTHX_ struct coro *coro)
941{
942 size_t rss = sizeof (*coro);
943
944 if (coro->mainstack)
945 {
946 if (coro->flags & CF_RUNNING)
552 { 947 {
553 /*FIXME*//*D*//* reasonable stack size! */ 948 #define SYM(sym) PL_ ## sym
554 stack->ssize = -4096 * sizeof (long); 949 CORO_RSS;
555 New (0, stack->sptr, 4096, long); 950 #undef SYM
556 } 951 }
557 }
558 else 952 else
559 stack->sptr = 0;
560
561 ctx->stack = stack;
562}
563
564static void
565deallocate_stack (Coro__State ctx)
566{
567 coro_stack *stack = ctx->stack;
568
569 ctx->stack = 0;
570
571 if (stack)
572 {
573 if (!--stack->refcnt)
574 { 953 {
575#ifdef HAVE_MMAP 954 #define SYM(sym) coro->slot->sym
576 if (stack->ssize > 0 && stack->sptr) 955 CORO_RSS;
577 munmap (stack->sptr, stack->ssize); 956 #undef SYM
957 }
958 }
959
960 return rss;
961}
962
963/** coroutine stack handling ************************************************/
964
965static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
966static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
967static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
968
969/* apparently < 5.8.8 */
970#ifndef MgPV_nolen_const
971#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
972 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
973 (const char*)(mg)->mg_ptr)
974#endif
975
976/*
977 * This overrides the default magic get method of %SIG elements.
978 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
979 * and instead of trying to save and restore the hash elements (extremely slow),
980 * we just provide our own readback here.
981 */
982static int ecb_cold
983coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
984{
985 const char *s = MgPV_nolen_const (mg);
986
987 if (*s == '_')
988 {
989 SV **svp = 0;
990
991 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
992 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
993
994 if (svp)
995 {
996 SV *ssv;
997
998 if (!*svp)
999 ssv = &PL_sv_undef;
1000 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1001 ssv = sv_2mortal (newRV_inc (*svp));
578 else 1002 else
579#else 1003 ssv = *svp;
580 Safefree (stack->sptr); 1004
581#endif 1005 sv_setsv (sv, ssv);
582 Safefree (stack); 1006 return 0;
583 } 1007 }
584 else if (ctx->gencnt == stack->gencnt) 1008 }
585 --stack->usecnt; 1009
1010 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1011}
1012
1013static int ecb_cold
1014coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1015{
1016 const char *s = MgPV_nolen_const (mg);
1017
1018 if (*s == '_')
586 } 1019 {
587} 1020 SV **svp = 0;
588 1021
1022 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1023 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1024
1025 if (svp)
1026 {
1027 SV *old = *svp;
1028 *svp = 0;
1029 SvREFCNT_dec (old);
1030 return 0;
1031 }
1032 }
1033
1034 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1035}
1036
1037static int ecb_cold
1038coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1039{
1040 const char *s = MgPV_nolen_const (mg);
1041
1042 if (*s == '_')
1043 {
1044 SV **svp = 0;
1045
1046 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1047 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1048
1049 if (svp)
1050 {
1051 SV *old = *svp;
1052 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1053 SvREFCNT_dec (old);
1054 return 0;
1055 }
1056 }
1057
1058 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1059}
1060
1061static void
1062prepare_nop (pTHX_ struct coro_transfer_args *ta)
1063{
1064 /* kind of mega-hacky, but works */
1065 ta->next = ta->prev = (struct coro *)ta;
1066}
1067
589static void 1068static int
590setup_coro (void *arg) 1069slf_check_nop (pTHX_ struct CoroSLF *frame)
1070{
1071 return 0;
1072}
1073
1074static int
1075slf_check_repeat (pTHX_ struct CoroSLF *frame)
1076{
1077 return 1;
1078}
1079
1080static UNOP init_perl_op;
1081
1082ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1083init_perl (pTHX_ struct coro *coro)
591{ 1084{
592 /* 1085 /*
593 * emulate part of the perl startup here. 1086 * emulate part of the perl startup here.
594 */ 1087 */
1088 coro_init_stacks (aTHX);
1089
1090 PL_runops = RUNOPS_DEFAULT;
1091 PL_curcop = &PL_compiling;
1092 PL_in_eval = EVAL_NULL;
1093 PL_comppad = 0;
1094 PL_comppad_name = 0;
1095 PL_comppad_name_fill = 0;
1096 PL_comppad_name_floor = 0;
1097 PL_curpm = 0;
1098 PL_curpad = 0;
1099 PL_localizing = 0;
1100 PL_restartop = 0;
1101#if PERL_VERSION_ATLEAST (5,10,0)
1102 PL_parser = 0;
1103#endif
1104 PL_hints = 0;
1105
1106 /* recreate the die/warn hooks */
1107 PL_diehook = SvREFCNT_inc (rv_diehook);
1108 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1109
1110 GvSV (PL_defgv) = newSV (0);
1111 GvAV (PL_defgv) = coro->args; coro->args = 0;
1112 GvSV (PL_errgv) = newSV (0);
1113 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1114 GvHV (PL_hintgv) = 0;
1115 PL_rs = newSVsv (GvSV (irsgv));
1116 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1117
1118 {
1119 dSP;
1120 UNOP myop;
1121
1122 Zero (&myop, 1, UNOP);
1123 myop.op_next = Nullop;
1124 myop.op_type = OP_ENTERSUB;
1125 myop.op_flags = OPf_WANT_VOID;
1126
1127 PUSHMARK (SP);
1128 PUSHs ((SV *)coro->startcv);
1129 PUTBACK;
1130 PL_op = (OP *)&myop;
1131 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1132 }
1133
1134 /* this newly created coroutine might be run on an existing cctx which most
1135 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1136 */
1137 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1138 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1139 slf_frame.destroy = 0;
1140
1141 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1142 init_perl_op.op_next = PL_op;
1143 init_perl_op.op_type = OP_ENTERSUB;
1144 init_perl_op.op_ppaddr = pp_slf;
1145 /* no flags etc. required, as an init function won't be called */
1146
1147 PL_op = (OP *)&init_perl_op;
1148
1149 /* copy throw, in case it was set before init_perl */
1150 CORO_THROW = coro->except;
1151
1152 SWAP_SVS (coro);
1153
1154 if (ecb_expect_false (enable_times))
1155 {
1156 coro_times_update ();
1157 coro_times_sub (coro);
1158 }
1159}
1160
1161static void
1162coro_unwind_stacks (pTHX)
1163{
1164 if (!IN_DESTRUCT)
1165 {
1166 /* restore all saved variables and stuff */
1167 LEAVE_SCOPE (0);
1168 assert (PL_tmps_floor == -1);
1169
1170 /* free all temporaries */
1171 FREETMPS;
1172 assert (PL_tmps_ix == -1);
1173
1174 /* unwind all extra stacks */
1175 POPSTACK_TO (PL_mainstack);
1176
1177 /* unwind main stack */
1178 dounwind (-1);
1179 }
1180}
1181
1182static void
1183destroy_perl (pTHX_ struct coro *coro)
1184{
1185 SV *svf [9];
1186
1187 {
1188 SV *old_current = SvRV (coro_current);
1189 struct coro *current = SvSTATE (old_current);
1190
1191 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1192
1193 save_perl (aTHX_ current);
1194
1195 /* this will cause transfer_check to croak on block*/
1196 SvRV_set (coro_current, (SV *)coro->hv);
1197
1198 load_perl (aTHX_ coro);
1199
1200 coro_unwind_stacks (aTHX);
1201
1202 /* restore swapped sv's */
1203 SWAP_SVS (coro);
1204
1205 coro_destruct_stacks (aTHX);
1206
1207 /* now save some sv's to be free'd later */
1208 svf [0] = GvSV (PL_defgv);
1209 svf [1] = (SV *)GvAV (PL_defgv);
1210 svf [2] = GvSV (PL_errgv);
1211 svf [3] = (SV *)PL_defoutgv;
1212 svf [4] = PL_rs;
1213 svf [5] = GvSV (irsgv);
1214 svf [6] = (SV *)GvHV (PL_hintgv);
1215 svf [7] = PL_diehook;
1216 svf [8] = PL_warnhook;
1217 assert (9 == sizeof (svf) / sizeof (*svf));
1218
1219 SvRV_set (coro_current, old_current);
1220
1221 load_perl (aTHX_ current);
1222 }
1223
1224 {
1225 unsigned int i;
1226
1227 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1228 SvREFCNT_dec (svf [i]);
1229
1230 SvREFCNT_dec (coro->saved_deffh);
1231 SvREFCNT_dec (coro->rouse_cb);
1232 SvREFCNT_dec (coro->invoke_cb);
1233 SvREFCNT_dec (coro->invoke_av);
1234 }
1235}
1236
1237ecb_inline void
1238free_coro_mortal (pTHX)
1239{
1240 if (ecb_expect_true (coro_mortal))
1241 {
1242 SvREFCNT_dec ((SV *)coro_mortal);
1243 coro_mortal = 0;
1244 }
1245}
1246
1247static int
1248runops_trace (pTHX)
1249{
1250 COP *oldcop = 0;
1251 int oldcxix = -2;
1252
1253 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1254 {
1255 PERL_ASYNC_CHECK ();
1256
1257 if (cctx_current->flags & CC_TRACE_ALL)
1258 {
1259 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1260 {
1261 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1262 SV **bot, **top;
1263 AV *av = newAV (); /* return values */
1264 SV **cb;
1265 dSP;
1266
1267 GV *gv = CvGV (cx->blk_sub.cv);
1268 SV *fullname = sv_2mortal (newSV (0));
1269 if (isGV (gv))
1270 gv_efullname3 (fullname, gv, 0);
1271
1272 bot = PL_stack_base + cx->blk_oldsp + 1;
1273 top = cx->blk_gimme == G_ARRAY ? SP + 1
1274 : cx->blk_gimme == G_SCALAR ? bot + 1
1275 : bot;
1276
1277 av_extend (av, top - bot);
1278 while (bot < top)
1279 av_push (av, SvREFCNT_inc_NN (*bot++));
1280
1281 PL_runops = RUNOPS_DEFAULT;
1282 ENTER;
1283 SAVETMPS;
1284 EXTEND (SP, 3);
1285 PUSHMARK (SP);
1286 PUSHs (&PL_sv_no);
1287 PUSHs (fullname);
1288 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1289 PUTBACK;
1290 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1291 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1292 SPAGAIN;
1293 FREETMPS;
1294 LEAVE;
1295 PL_runops = runops_trace;
1296 }
1297
1298 if (oldcop != PL_curcop)
1299 {
1300 oldcop = PL_curcop;
1301
1302 if (PL_curcop != &PL_compiling)
1303 {
1304 SV **cb;
1305
1306 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1307 {
1308 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1309
1310 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1311 {
1312 dSP;
1313 GV *gv = CvGV (cx->blk_sub.cv);
1314 SV *fullname = sv_2mortal (newSV (0));
1315
1316 if (isGV (gv))
1317 gv_efullname3 (fullname, gv, 0);
1318
1319 PL_runops = RUNOPS_DEFAULT;
1320 ENTER;
1321 SAVETMPS;
1322 EXTEND (SP, 3);
1323 PUSHMARK (SP);
1324 PUSHs (&PL_sv_yes);
1325 PUSHs (fullname);
1326 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1327 PUTBACK;
1328 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1329 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1330 SPAGAIN;
1331 FREETMPS;
1332 LEAVE;
1333 PL_runops = runops_trace;
1334 }
1335
1336 oldcxix = cxstack_ix;
1337 }
1338
1339 if (cctx_current->flags & CC_TRACE_LINE)
1340 {
1341 dSP;
1342
1343 PL_runops = RUNOPS_DEFAULT;
1344 ENTER;
1345 SAVETMPS;
1346 EXTEND (SP, 3);
1347 PL_runops = RUNOPS_DEFAULT;
1348 PUSHMARK (SP);
1349 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1350 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1351 PUTBACK;
1352 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1353 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1354 SPAGAIN;
1355 FREETMPS;
1356 LEAVE;
1357 PL_runops = runops_trace;
1358 }
1359 }
1360 }
1361 }
1362 }
1363
1364 TAINT_NOT;
1365 return 0;
1366}
1367
1368static struct CoroSLF cctx_ssl_frame;
1369
1370static void
1371slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1372{
1373 ta->prev = 0;
1374}
1375
1376static int
1377slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1378{
1379 *frame = cctx_ssl_frame;
1380
1381 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1382}
1383
1384/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1385static void ecb_noinline
1386cctx_prepare (pTHX)
1387{
1388 PL_top_env = &PL_start_env;
1389
1390 if (cctx_current->flags & CC_TRACE)
1391 PL_runops = runops_trace;
1392
1393 /* we already must be executing an SLF op, there is no other valid way
1394 * that can lead to creation of a new cctx */
1395 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1396 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1397
1398 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1399 cctx_ssl_frame = slf_frame;
1400
1401 slf_frame.prepare = slf_prepare_set_stacklevel;
1402 slf_frame.check = slf_check_set_stacklevel;
1403}
1404
1405/* the tail of transfer: execute stuff we can only do after a transfer */
1406ecb_inline void
1407transfer_tail (pTHX)
1408{
1409 free_coro_mortal (aTHX);
1410}
1411
1412/* try to exit the same way perl's main function would do */
1413/* we do not bother resetting the environment or other things *7
1414/* that are not, uhm, essential */
1415/* this obviously also doesn't work when perl is embedded */
1416static void ecb_noinline ecb_cold
1417perlish_exit (pTHX)
1418{
1419 int exitstatus = perl_destruct (PL_curinterp);
1420 perl_free (PL_curinterp);
1421 exit (exitstatus);
1422}
1423
1424/*
1425 * this is a _very_ stripped down perl interpreter ;)
1426 */
1427static void
1428cctx_run (void *arg)
1429{
1430#ifdef USE_ITHREADS
1431# if CORO_PTHREAD
1432 PERL_SET_CONTEXT (coro_thx);
1433# endif
1434#endif
1435 {
1436 dTHX;
1437
1438 /* normally we would need to skip the entersub here */
1439 /* not doing so will re-execute it, which is exactly what we want */
1440 /* PL_nop = PL_nop->op_next */
1441
1442 /* inject a fake subroutine call to cctx_init */
1443 cctx_prepare (aTHX);
1444
1445 /* cctx_run is the alternative tail of transfer() */
1446 transfer_tail (aTHX);
1447
1448 /* somebody or something will hit me for both perl_run and PL_restartop */
1449 PL_restartop = PL_op;
1450 perl_run (PL_curinterp);
1451 /*
1452 * Unfortunately, there is no way to get at the return values of the
1453 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1454 * runtime errors here, as this is just a random interpreter, not a thread.
1455 */
1456
1457 /*
1458 * If perl-run returns we assume exit() was being called or the coro
1459 * fell off the end, which seems to be the only valid (non-bug)
1460 * reason for perl_run to return. We try to mimic whatever perl is normally
1461 * doing in that case. YMMV.
1462 */
1463 perlish_exit (aTHX);
1464 }
1465}
1466
1467static coro_cctx *
1468cctx_new (void)
1469{
1470 coro_cctx *cctx;
1471
1472 ++cctx_count;
1473 New (0, cctx, 1, coro_cctx);
1474
1475 cctx->gen = cctx_gen;
1476 cctx->flags = 0;
1477 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1478
1479 return cctx;
1480}
1481
1482/* create a new cctx only suitable as source */
1483static coro_cctx *
1484cctx_new_empty (void)
1485{
1486 coro_cctx *cctx = cctx_new ();
1487
1488 cctx->stack.sptr = 0;
1489 coro_create (&cctx->cctx, 0, 0, 0, 0);
1490
1491 return cctx;
1492}
1493
1494/* create a new cctx suitable as destination/running a perl interpreter */
1495static coro_cctx *
1496cctx_new_run (void)
1497{
1498 coro_cctx *cctx = cctx_new ();
1499
1500 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
1501 {
1502 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1503 _exit (EXIT_FAILURE);
1504 }
1505
1506 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
1507
1508 return cctx;
1509}
1510
1511static void
1512cctx_destroy (coro_cctx *cctx)
1513{
1514 if (!cctx)
1515 return;
1516
1517 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1518
1519 --cctx_count;
1520 coro_destroy (&cctx->cctx);
1521
1522 coro_stack_free (&cctx->stack);
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 (ecb_expect_true (cctx_first))
1534 {
1535 coro_cctx *cctx = cctx_first;
1536 cctx_first = cctx->next;
1537 --cctx_idle;
1538
1539 if (ecb_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->stack.sptr));
1552
1553 /* free another cctx if overlimit */
1554 if (ecb_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 (ecb_expect_true (prev != next))
1576 {
1577 if (ecb_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 (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | 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 (ecb_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 ecb_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 (ecb_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 (ecb_expect_true (prev != next))
1603 {
1604 coro_cctx *cctx_prev;
1605
1606 if (ecb_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 (ecb_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 (ecb_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 (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1642 if (ecb_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 = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1654
1655 next->cctx = 0;
1656
1657 if (ecb_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
1673/* this function is actually Coro, not Coro::State, but we call it from here */
1674/* because it is convenient - but it hasn't been declared yet for that reason */
1675static void
1676coro_call_on_destroy (pTHX_ struct coro *coro);
1677
1678static void
1679coro_state_destroy (pTHX_ struct coro *coro)
1680{
1681 if (coro->flags & CF_ZOMBIE)
1682 return;
1683
1684 slf_destroy (aTHX_ coro);
1685
1686 coro->flags |= CF_ZOMBIE;
1687
1688 if (coro->flags & CF_READY)
1689 {
1690 /* reduce nready, as destroying a ready coro effectively unreadies it */
1691 /* alternative: look through all ready queues and remove the coro */
1692 --coro_nready;
1693 }
1694 else
1695 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1696
1697 if (coro->next) coro->next->prev = coro->prev;
1698 if (coro->prev) coro->prev->next = coro->next;
1699 if (coro == coro_first) coro_first = coro->next;
1700
1701 if (coro->mainstack
1702 && coro->mainstack != main_mainstack
1703 && coro->slot
1704 && !PL_dirty)
1705 destroy_perl (aTHX_ coro);
1706
1707 cctx_destroy (coro->cctx);
1708 SvREFCNT_dec (coro->startcv);
1709 SvREFCNT_dec (coro->args);
1710 SvREFCNT_dec (coro->swap_sv);
1711 SvREFCNT_dec (CORO_THROW);
1712
1713 coro_call_on_destroy (aTHX_ coro);
1714
1715 /* more destruction mayhem in coro_state_free */
1716}
1717
1718static int
1719coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1720{
1721 struct coro *coro = (struct coro *)mg->mg_ptr;
1722 mg->mg_ptr = 0;
1723
1724 coro_state_destroy (aTHX_ coro);
1725 SvREFCNT_dec (coro->on_destroy);
1726 SvREFCNT_dec (coro->status);
1727
1728 Safefree (coro);
1729
1730 return 0;
1731}
1732
1733static int ecb_cold
1734coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1735{
1736 /* called when perl clones the current process the slow way (windows process emulation) */
1737 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1738 mg->mg_ptr = 0;
1739 mg->mg_virtual = 0;
1740
1741 return 0;
1742}
1743
1744static MGVTBL coro_state_vtbl = {
1745 0, 0, 0, 0,
1746 coro_state_free,
1747 0,
1748#ifdef MGf_DUP
1749 coro_state_dup,
1750#else
1751# define MGf_DUP 0
1752#endif
1753};
1754
1755static void
1756prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1757{
1758 ta->prev = SvSTATE (prev_sv);
1759 ta->next = SvSTATE (next_sv);
1760 TRANSFER_CHECK (*ta);
1761}
1762
1763static void
1764api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1765{
1766 struct coro_transfer_args ta;
1767
1768 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1769 TRANSFER (ta, 1);
1770}
1771
1772/** Coro ********************************************************************/
1773
1774ecb_inline void
1775coro_enq (pTHX_ struct coro *coro)
1776{
1777 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1778
1779 SvREFCNT_inc_NN (coro->hv);
1780
1781 coro->next_ready = 0;
1782 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1783 ready [1] = coro;
1784}
1785
1786ecb_inline struct coro *
1787coro_deq (pTHX)
1788{
1789 int prio;
1790
1791 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1792 {
1793 struct coro **ready = coro_ready [prio];
1794
1795 if (ready [0])
1796 {
1797 struct coro *coro = ready [0];
1798 ready [0] = coro->next_ready;
1799 return coro;
1800 }
1801 }
1802
1803 return 0;
1804}
1805
1806static void
1807invoke_sv_ready_hook_helper (void)
1808{
1809 dTHX;
595 dSP; 1810 dSP;
596 Coro__State ctx = (Coro__State)arg;
597 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
598 1811
599 coro_init_stacks (aTHX); 1812 ENTER;
600 /*PL_curcop = 0;*/ 1813 SAVETMPS;
601 /*PL_in_eval = PL_in_eval;*/ /* inherit */
602 SvREFCNT_dec (GvAV (PL_defgv));
603 GvAV (PL_defgv) = ctx->args;
604 1814
605 SPAGAIN;
606
607 if (ctx->stack)
608 {
609 ctx->cursp = 0;
610
611 PUSHMARK(SP); 1815 PUSHMARK (SP);
612 PUTBACK; 1816 PUTBACK;
613 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 1817 call_sv (coro_readyhook, G_VOID | G_DISCARD);
614 1818
615 if (SvTRUE (ERRSV)) 1819 FREETMPS;
616 croak (NULL); 1820 LEAVE;
617 else 1821}
618 croak ("FATAL: CCTXT coroutine returned!"); 1822
1823static int
1824api_ready (pTHX_ SV *coro_sv)
1825{
1826 struct coro *coro = SvSTATE (coro_sv);
1827
1828 if (coro->flags & CF_READY)
1829 return 0;
1830
1831 coro->flags |= CF_READY;
1832
1833 coro_enq (aTHX_ coro);
1834
1835 if (!coro_nready++)
1836 if (coroapi.readyhook)
1837 coroapi.readyhook ();
1838
1839 return 1;
1840}
1841
1842static int
1843api_is_ready (pTHX_ SV *coro_sv)
1844{
1845 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1846}
1847
1848/* expects to own a reference to next->hv */
1849ecb_inline void
1850prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1851{
1852 SV *prev_sv = SvRV (coro_current);
1853
1854 ta->prev = SvSTATE_hv (prev_sv);
1855 ta->next = next;
1856
1857 TRANSFER_CHECK (*ta);
1858
1859 SvRV_set (coro_current, (SV *)next->hv);
1860
1861 free_coro_mortal (aTHX);
1862 coro_mortal = prev_sv;
1863}
1864
1865static void
1866prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1867{
1868 for (;;)
619 } 1869 {
620 else 1870 struct coro *next = coro_deq (aTHX);
621 {
622 UNOP myop;
623 1871
624 PL_op = (OP *)&myop; 1872 if (ecb_expect_true (next))
625
626 Zero(&myop, 1, UNOP);
627 myop.op_next = Nullop;
628 myop.op_flags = OPf_WANT_VOID;
629
630 PUSHMARK(SP);
631 XPUSHs (sub_init);
632 /*
633 * the next line is slightly wrong, as PL_op->op_next
634 * is actually being executed so we skip the first op.
635 * that doesn't matter, though, since it is only
636 * pp_nextstate and we never return...
637 * ah yes, and I don't care anyways ;)
638 */
639 PUTBACK;
640 PL_op = pp_entersub();
641 SPAGAIN;
642
643 ENTER; /* necessary e.g. for dounwind */
644 }
645}
646
647static void
648continue_coro (void *arg)
649{
650 /*
651 * this is a _very_ stripped down perl interpreter ;)
652 */
653 Coro__State ctx = (Coro__State)arg;
654
655 /*FIXME*//* must set up top_env here */
656 ctx->cursp = 0;
657 PL_op = PL_op->op_next;
658 CALLRUNOPS(aTHX);
659
660 abort ();
661}
662
663STATIC void
664transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
665{
666 dSP;
667 dSTACKLEVEL;
668
669 if (prev != next)
670 {
671 if (next->mainstack)
672 { 1873 {
673 SAVE (prev, flags); 1874 /* cannot transfer to destroyed coros, skip and look for next */
674 LOAD (next); 1875 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
675 1876 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
676 /* mark this state as in-use */ 1877 else
677 next->mainstack = 0;
678 next->tmps_ix = -2;
679
680 /* stacklevel changed? if yes, grab the stack for us! */
681 if (flags & TRANSFER_SAVE_CCTXT)
682 { 1878 {
683 if (!prev->stack) 1879 next->flags &= ~CF_READY;
684 allocate_stack (prev, 0); 1880 --coro_nready;
685 else if (prev->cursp != stacklevel 1881
686 && prev->stack->usecnt > 1) 1882 prepare_schedule_to (aTHX_ ta, next);
687 { 1883 break;
688 prev->gencnt = ++prev->stack->gencnt;
689 prev->stack->usecnt = 1;
690 }
691
692 /* has our stack been invalidated? */
693 if (next->stack && next->stack->gencnt != next->gencnt)
694 {
695 deallocate_stack (next);
696 allocate_stack (next, 1);
697 coro_create (&(next->stack->cctx),
698 continue_coro, (void *)next,
699 next->stack->sptr, labs (next->stack->ssize));
700 }
701
702 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
703 } 1884 }
704
705 } 1885 }
706 else if (next->tmps_ix == -2)
707 croak ("tried to transfer to running coroutine");
708 else 1886 else
709 { 1887 {
710 SAVE (prev, -1); /* first get rid of the old state */ 1888 /* nothing to schedule: call the idle handler */
711 1889 if (SvROK (sv_idle)
712 if (flags & TRANSFER_SAVE_CCTXT) 1890 && SvOBJECT (SvRV (sv_idle)))
713 { 1891 {
714 if (!prev->stack) 1892 if (SvRV (sv_idle) == SvRV (coro_current))
715 allocate_stack (prev, 0); 1893 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
716 1894
717 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK) 1895 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
718 { 1896 api_ready (aTHX_ SvRV (sv_idle));
719 setup_coro (next); 1897 --coro_nready;
720
721 prev->stack->refcnt++;
722 prev->stack->usecnt++;
723 next->stack = prev->stack;
724 next->gencnt = prev->gencnt;
725 }
726 else
727 {
728 allocate_stack (next, 1);
729 coro_create (&(next->stack->cctx),
730 setup_coro, (void *)next,
731 next->stack->sptr, labs (next->stack->ssize));
732 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
733 }
734 } 1898 }
735 else 1899 else
736 setup_coro (next); 1900 {
1901 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1902 dSP;
1903
1904 ENTER;
1905 SAVETMPS;
1906
1907 PUSHMARK (SP);
1908 PUTBACK;
1909 call_sv (sv_idle, G_VOID | G_DISCARD);
1910
1911 FREETMPS;
1912 LEAVE;
1913 }
737 } 1914 }
738 } 1915 }
739
740 next->cursp = stacklevel;
741} 1916}
742 1917
743static struct coro * 1918ecb_inline void
744sv_to_coro (SV *arg, const char *funcname, const char *varname) 1919prepare_cede (pTHX_ struct coro_transfer_args *ta)
745{ 1920{
746 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV) 1921 api_ready (aTHX_ coro_current);
747 { 1922 prepare_schedule (aTHX_ ta);
748 HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash); 1923}
749 1924
750 if (!he) 1925ecb_inline void
751 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname); 1926prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1927{
1928 SV *prev = SvRV (coro_current);
752 1929
753 arg = HeVAL(he); 1930 if (coro_nready)
754 } 1931 {
1932 prepare_schedule (aTHX_ ta);
1933 api_ready (aTHX_ prev);
755 1934 }
756 /* must also be changed inside Coro::Cont::yield */
757 if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)
758 return (struct coro *) SvIV((SV*)SvRV(arg));
759 else 1935 else
760 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname); 1936 prepare_nop (aTHX_ ta);
761} 1937}
762 1938
1939static void
1940api_schedule (pTHX)
1941{
1942 struct coro_transfer_args ta;
1943
1944 prepare_schedule (aTHX_ &ta);
1945 TRANSFER (ta, 1);
1946}
1947
1948static void
1949api_schedule_to (pTHX_ SV *coro_sv)
1950{
1951 struct coro_transfer_args ta;
1952 struct coro *next = SvSTATE (coro_sv);
1953
1954 SvREFCNT_inc_NN (coro_sv);
1955 prepare_schedule_to (aTHX_ &ta, next);
1956}
1957
763static void 1958static int
764api_transfer(pTHX_ SV *prev, SV *next, int flags) 1959api_cede (pTHX)
765{ 1960{
766 transfer(aTHX_ sv_to_coro (prev, "Coro::transfer", "prev"), 1961 struct coro_transfer_args ta;
767 sv_to_coro (next, "Coro::transfer", "next"),
768 flags);
769}
770 1962
771/** Coro ********************************************************************/ 1963 prepare_cede (aTHX_ &ta);
772 1964
773#define PRIO_MAX 3 1965 if (ecb_expect_true (ta.prev != ta.next))
774#define PRIO_HIGH 1 1966 {
775#define PRIO_NORMAL 0 1967 TRANSFER (ta, 1);
776#define PRIO_LOW -1 1968 return 1;
777#define PRIO_IDLE -3
778#define PRIO_MIN -4
779
780/* for Coro.pm */
781static GV *coro_current, *coro_idle;
782static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
783static int coro_nready;
784
785static void
786coro_enq (SV *sv)
787{
788 if (SvROK (sv))
789 { 1969 }
790 SV *hv = SvRV (sv); 1970 else
791 if (SvTYPE (hv) == SVt_PVHV) 1971 return 0;
1972}
1973
1974static int
1975api_cede_notself (pTHX)
1976{
1977 if (coro_nready)
1978 {
1979 struct coro_transfer_args ta;
1980
1981 prepare_cede_notself (aTHX_ &ta);
1982 TRANSFER (ta, 1);
1983 return 1;
1984 }
1985 else
1986 return 0;
1987}
1988
1989static void
1990api_trace (pTHX_ SV *coro_sv, int flags)
1991{
1992 struct coro *coro = SvSTATE (coro_sv);
1993
1994 if (coro->flags & CF_RUNNING)
1995 croak ("cannot enable tracing on a running coroutine, caught");
1996
1997 if (flags & CC_TRACE)
1998 {
1999 if (!coro->cctx)
2000 coro->cctx = cctx_new_run ();
2001 else if (!(coro->cctx->flags & CC_TRACE))
2002 croak ("cannot enable tracing on coroutine with custom stack, caught");
2003
2004 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2005 }
2006 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2007 {
2008 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2009
2010 if (coro->flags & CF_RUNNING)
2011 PL_runops = RUNOPS_DEFAULT;
2012 else
2013 coro->slot->runops = RUNOPS_DEFAULT;
2014 }
2015}
2016
2017static void
2018coro_push_av (pTHX_ AV *av, I32 gimme_v)
2019{
2020 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2021 {
2022 dSP;
2023
2024 if (gimme_v == G_SCALAR)
2025 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2026 else
792 { 2027 {
793 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0); 2028 int i;
794 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 2029 EXTEND (SP, AvFILLp (av) + 1);
795 2030
796 prio = prio > PRIO_MAX ? PRIO_MAX 2031 for (i = 0; i <= AvFILLp (av); ++i)
797 : prio < PRIO_MIN ? PRIO_MIN 2032 PUSHs (AvARRAY (av)[i]);
798 : prio; 2033 }
799 2034
800 av_push (coro_ready [prio - PRIO_MIN], sv); 2035 PUTBACK;
801 coro_nready++; 2036 }
2037}
802 2038
2039static void
2040coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2041{
2042 if (!coro->on_destroy)
2043 coro->on_destroy = newAV ();
2044
2045 av_push (coro->on_destroy, cb);
2046}
2047
2048static void
2049slf_destroy_join (pTHX_ struct CoroSLF *frame)
2050{
2051 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2052}
2053
2054static int
2055slf_check_join (pTHX_ struct CoroSLF *frame)
2056{
2057 struct coro *coro = (struct coro *)frame->data;
2058
2059 if (!coro->status)
2060 return 1;
2061
2062 frame->destroy = 0;
2063
2064 coro_push_av (aTHX_ coro->status, GIMME_V);
2065
2066 SvREFCNT_dec ((SV *)coro->hv);
2067
2068 return 0;
2069}
2070
2071static void
2072slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2073{
2074 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2075
2076 if (items > 1)
2077 croak ("join called with too many arguments");
2078
2079 if (coro->status)
2080 frame->prepare = prepare_nop;
2081 else
2082 {
2083 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2084 frame->prepare = prepare_schedule;
2085 }
2086
2087 frame->check = slf_check_join;
2088 frame->destroy = slf_destroy_join;
2089 frame->data = (void *)coro;
2090 SvREFCNT_inc (coro->hv);
2091}
2092
2093static void
2094coro_call_on_destroy (pTHX_ struct coro *coro)
2095{
2096 AV *od = coro->on_destroy;
2097
2098 if (!od)
2099 return;
2100
2101 while (AvFILLp (od) >= 0)
2102 {
2103 SV *cb = sv_2mortal (av_pop (od));
2104
2105 /* coro hv's (and only hv's at the moment) are supported as well */
2106 if (SvSTATEhv_p (aTHX_ cb))
2107 api_ready (aTHX_ cb);
2108 else
2109 {
2110 dSP; /* don't disturb outer sp */
2111 PUSHMARK (SP);
2112
2113 if (coro->status)
2114 {
2115 PUTBACK;
2116 coro_push_av (aTHX_ coro->status, G_ARRAY);
2117 SPAGAIN;
2118 }
2119
2120 PUTBACK;
2121 call_sv (cb, G_VOID | G_DISCARD);
2122 }
2123 }
2124}
2125
2126static void
2127coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2128{
2129 AV *av;
2130
2131 if (coro->status)
2132 {
2133 av = coro->status;
2134 av_clear (av);
2135 }
2136 else
2137 av = coro->status = newAV ();
2138
2139 /* items are actually not so common, so optimise for this case */
2140 if (items)
2141 {
2142 int i;
2143
2144 av_extend (av, items - 1);
2145
2146 for (i = 0; i < items; ++i)
2147 av_push (av, SvREFCNT_inc_NN (arg [i]));
2148 }
2149}
2150
2151static void
2152slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2153{
2154 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2155 api_ready (aTHX_ sv_manager);
2156
2157 frame->prepare = prepare_schedule;
2158 frame->check = slf_check_repeat;
2159
2160 /* as a minor optimisation, we could unwind all stacks here */
2161 /* but that puts extra pressure on pp_slf, and is not worth much */
2162 /*coro_unwind_stacks (aTHX);*/
2163}
2164
2165static void
2166slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2167{
2168 HV *coro_hv = (HV *)SvRV (coro_current);
2169
2170 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2171 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2172}
2173
2174static void
2175slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2176{
2177 HV *coro_hv;
2178 struct coro *coro;
2179
2180 if (items <= 0)
2181 croak ("Coro::cancel called without coro object,");
2182
2183 coro = SvSTATE (arg [0]);
2184 coro_hv = coro->hv;
2185
2186 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2187
2188 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2189 {
2190 /* coro currently busy cancelling something, so just notify it */
2191 coro->slf_frame.data = (void *)coro;
2192
2193 frame->prepare = prepare_nop;
2194 frame->check = slf_check_nop;
2195 }
2196 else if (coro_hv == (HV *)SvRV (coro_current))
2197 {
2198 /* cancelling the current coro is allowed, and equals terminate */
2199 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2200 }
2201 else
2202 {
2203 struct coro *self = SvSTATE_current;
2204
2205 /* otherwise we cancel directly, purely for speed reasons
2206 * unfortunately, this requires some magic trickery, as
2207 * somebody else could cancel us, so we have to fight the cancellation.
2208 * this is ugly, and hopefully fully worth the extra speed.
2209 * besides, I can't get the slow-but-safe version working...
2210 */
2211 slf_frame.data = 0;
2212 self->flags |= CF_NOCANCEL;
2213 coro_state_destroy (aTHX_ coro);
2214 self->flags &= ~CF_NOCANCEL;
2215
2216 if (slf_frame.data)
2217 {
2218 /* while we were busy we have been cancelled, so terminate */
2219 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2220 }
2221 else
2222 {
2223 frame->prepare = prepare_nop;
2224 frame->check = slf_check_nop;
2225 }
2226 }
2227}
2228
2229static int
2230slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2231{
2232 frame->prepare = 0;
2233 coro_unwind_stacks (aTHX);
2234
2235 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2236
2237 return 1;
2238}
2239
2240static int
2241safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2242{
2243 if (coro->cctx)
2244 croak ("coro inside C callback, unable to cancel at this time, caught");
2245
2246 if (coro->flags & CF_NEW)
2247 {
2248 coro_set_status (aTHX_ coro, arg, items);
2249 coro_state_destroy (aTHX_ coro);
2250 }
2251 else
2252 {
2253 if (!coro->slf_frame.prepare)
2254 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2255
2256 slf_destroy (aTHX_ coro);
2257
2258 coro_set_status (aTHX_ coro, arg, items);
2259 coro->slf_frame.prepare = prepare_nop;
2260 coro->slf_frame.check = slf_check_safe_cancel;
2261
2262 api_ready (aTHX_ (SV *)coro->hv);
2263 }
2264
2265 return 1;
2266}
2267
2268/*****************************************************************************/
2269/* async pool handler */
2270
2271static int
2272slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2273{
2274 HV *hv = (HV *)SvRV (coro_current);
2275 struct coro *coro = (struct coro *)frame->data;
2276
2277 if (!coro->invoke_cb)
2278 return 1; /* loop till we have invoke */
2279 else
2280 {
2281 hv_store (hv, "desc", sizeof ("desc") - 1,
2282 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2283
2284 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2285
2286 {
2287 dSP;
2288 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2289 PUTBACK;
2290 }
2291
2292 SvREFCNT_dec (GvAV (PL_defgv));
2293 GvAV (PL_defgv) = coro->invoke_av;
2294 coro->invoke_av = 0;
2295
2296 return 0;
2297 }
2298}
2299
2300static void
2301slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2302{
2303 HV *hv = (HV *)SvRV (coro_current);
2304 struct coro *coro = SvSTATE_hv ((SV *)hv);
2305
2306 if (ecb_expect_true (coro->saved_deffh))
2307 {
2308 /* subsequent iteration */
2309 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2310 coro->saved_deffh = 0;
2311
2312 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2313 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2314 {
2315 slf_init_terminate_cancel_common (aTHX_ frame, hv);
803 return; 2316 return;
804 } 2317 }
2318 else
2319 {
2320 av_clear (GvAV (PL_defgv));
2321 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2322
2323 coro->prio = 0;
2324
2325 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2326 api_trace (aTHX_ coro_current, 0);
2327
2328 frame->prepare = prepare_schedule;
2329 av_push (av_async_pool, SvREFCNT_inc (hv));
2330 }
2331 }
2332 else
805 } 2333 {
2334 /* first iteration, simply fall through */
2335 frame->prepare = prepare_nop;
2336 }
806 2337
807 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 2338 frame->check = slf_check_pool_handler;
2339 frame->data = (void *)coro;
2340}
2341
2342/*****************************************************************************/
2343/* rouse callback */
2344
2345#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2346
2347static void
2348coro_rouse_callback (pTHX_ CV *cv)
2349{
2350 dXSARGS;
2351 SV *data = (SV *)S_GENSUB_ARG;
2352
2353 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2354 {
2355 /* first call, set args */
2356 SV *coro = SvRV (data);
2357 AV *av = newAV ();
2358
2359 SvRV_set (data, (SV *)av);
2360
2361 /* better take a full copy of the arguments */
2362 while (items--)
2363 av_store (av, items, newSVsv (ST (items)));
2364
2365 api_ready (aTHX_ coro);
2366 SvREFCNT_dec (coro);
2367 }
2368
2369 XSRETURN_EMPTY;
2370}
2371
2372static int
2373slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2374{
2375 SV *data = (SV *)frame->data;
2376
2377 if (CORO_THROW)
2378 return 0;
2379
2380 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2381 return 1;
2382
2383 /* now push all results on the stack */
2384 {
2385 dSP;
2386 AV *av = (AV *)SvRV (data);
2387 int i;
2388
2389 EXTEND (SP, AvFILLp (av) + 1);
2390 for (i = 0; i <= AvFILLp (av); ++i)
2391 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2392
2393 /* we have stolen the elements, so set length to zero and free */
2394 AvFILLp (av) = -1;
2395 av_undef (av);
2396
2397 PUTBACK;
2398 }
2399
2400 return 0;
2401}
2402
2403static void
2404slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2405{
2406 SV *cb;
2407
2408 if (items)
2409 cb = arg [0];
2410 else
2411 {
2412 struct coro *coro = SvSTATE_current;
2413
2414 if (!coro->rouse_cb)
2415 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2416
2417 cb = sv_2mortal (coro->rouse_cb);
2418 coro->rouse_cb = 0;
2419 }
2420
2421 if (!SvROK (cb)
2422 || SvTYPE (SvRV (cb)) != SVt_PVCV
2423 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2424 croak ("Coro::rouse_wait called with illegal callback argument,");
2425
2426 {
2427 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2428 SV *data = (SV *)S_GENSUB_ARG;
2429
2430 frame->data = (void *)data;
2431 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2432 frame->check = slf_check_rouse_wait;
2433 }
808} 2434}
809 2435
810static SV * 2436static SV *
811coro_deq (int min_prio) 2437coro_new_rouse_cb (pTHX)
812{ 2438{
813 int prio = PRIO_MAX - PRIO_MIN; 2439 HV *hv = (HV *)SvRV (coro_current);
2440 struct coro *coro = SvSTATE_hv (hv);
2441 SV *data = newRV_inc ((SV *)hv);
2442 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
814 2443
815 min_prio -= PRIO_MIN; 2444 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
816 if (min_prio < 0) 2445 SvREFCNT_dec (data); /* magicext increases the refcount */
817 min_prio = 0;
818 2446
819 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2447 SvREFCNT_dec (coro->rouse_cb);
820 if (av_len (coro_ready[prio]) >= 0) 2448 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2449
2450 return cb;
2451}
2452
2453/*****************************************************************************/
2454/* schedule-like-function opcode (SLF) */
2455
2456static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2457static const CV *slf_cv;
2458static SV **slf_argv;
2459static int slf_argc, slf_arga; /* count, allocated */
2460static I32 slf_ax; /* top of stack, for restore */
2461
2462/* this restores the stack in the case we patched the entersub, to */
2463/* recreate the stack frame as perl will on following calls */
2464/* since entersub cleared the stack */
2465static OP *
2466pp_restore (pTHX)
2467{
2468 int i;
2469 SV **SP = PL_stack_base + slf_ax;
2470
2471 PUSHMARK (SP);
2472
2473 EXTEND (SP, slf_argc + 1);
2474
2475 for (i = 0; i < slf_argc; ++i)
2476 PUSHs (sv_2mortal (slf_argv [i]));
2477
2478 PUSHs ((SV *)CvGV (slf_cv));
2479
2480 RETURNOP (slf_restore.op_first);
2481}
2482
2483static void
2484slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2485{
2486 SV **arg = (SV **)slf_frame.data;
2487
2488 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2489}
2490
2491static void
2492slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2493{
2494 if (items != 2)
2495 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2496
2497 frame->prepare = slf_prepare_transfer;
2498 frame->check = slf_check_nop;
2499 frame->data = (void *)arg; /* let's hope it will stay valid */
2500}
2501
2502static void
2503slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2504{
2505 frame->prepare = prepare_schedule;
2506 frame->check = slf_check_nop;
2507}
2508
2509static void
2510slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2511{
2512 struct coro *next = (struct coro *)slf_frame.data;
2513
2514 SvREFCNT_inc_NN (next->hv);
2515 prepare_schedule_to (aTHX_ ta, next);
2516}
2517
2518static void
2519slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2520{
2521 if (!items)
2522 croak ("Coro::schedule_to expects a coroutine argument, caught");
2523
2524 frame->data = (void *)SvSTATE (arg [0]);
2525 frame->prepare = slf_prepare_schedule_to;
2526 frame->check = slf_check_nop;
2527}
2528
2529static void
2530slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2531{
2532 api_ready (aTHX_ SvRV (coro_current));
2533
2534 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2535}
2536
2537static void
2538slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2539{
2540 frame->prepare = prepare_cede;
2541 frame->check = slf_check_nop;
2542}
2543
2544static void
2545slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2546{
2547 frame->prepare = prepare_cede_notself;
2548 frame->check = slf_check_nop;
2549}
2550
2551/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2552static void
2553slf_destroy (pTHX_ struct coro *coro)
2554{
2555 /* this callback is reserved for slf functions needing to do cleanup */
2556 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2557 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2558
2559 /*
2560 * The on_destroy above most likely is from an SLF call.
2561 * Since by definition the SLF call will not finish when we destroy
2562 * the coro, we will have to force-finish it here, otherwise
2563 * cleanup functions cannot call SLF functions.
2564 */
2565 coro->slf_frame.prepare = 0;
2566}
2567
2568/*
2569 * these not obviously related functions are all rolled into one
2570 * function to increase chances that they all will call transfer with the same
2571 * stack offset
2572 * SLF stands for "schedule-like-function".
2573 */
2574static OP *
2575pp_slf (pTHX)
2576{
2577 I32 checkmark; /* mark SP to see how many elements check has pushed */
2578
2579 /* set up the slf frame, unless it has already been set-up */
2580 /* the latter happens when a new coro has been started */
2581 /* or when a new cctx was attached to an existing coroutine */
2582 if (ecb_expect_true (!slf_frame.prepare))
2583 {
2584 /* first iteration */
2585 dSP;
2586 SV **arg = PL_stack_base + TOPMARK + 1;
2587 int items = SP - arg; /* args without function object */
2588 SV *gv = *sp;
2589
2590 /* do a quick consistency check on the "function" object, and if it isn't */
2591 /* for us, divert to the real entersub */
2592 if (SvTYPE (gv) != SVt_PVGV
2593 || !GvCV (gv)
2594 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2595 return PL_ppaddr[OP_ENTERSUB](aTHX);
2596
2597 if (!(PL_op->op_flags & OPf_STACKED))
821 { 2598 {
822 coro_nready--; 2599 /* ampersand-form of call, use @_ instead of stack */
823 return av_shift (coro_ready[prio]); 2600 AV *av = GvAV (PL_defgv);
2601 arg = AvARRAY (av);
2602 items = AvFILLp (av) + 1;
824 } 2603 }
2604
2605 /* now call the init function, which needs to set up slf_frame */
2606 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2607 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2608
2609 /* pop args */
2610 SP = PL_stack_base + POPMARK;
2611
2612 PUTBACK;
2613 }
2614
2615 /* now that we have a slf_frame, interpret it! */
2616 /* we use a callback system not to make the code needlessly */
2617 /* complicated, but so we can run multiple perl coros from one cctx */
2618
2619 do
2620 {
2621 struct coro_transfer_args ta;
2622
2623 slf_frame.prepare (aTHX_ &ta);
2624 TRANSFER (ta, 0);
2625
2626 checkmark = PL_stack_sp - PL_stack_base;
2627 }
2628 while (slf_frame.check (aTHX_ &slf_frame));
2629
2630 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2631
2632 /* exception handling */
2633 if (ecb_expect_false (CORO_THROW))
2634 {
2635 SV *exception = sv_2mortal (CORO_THROW);
2636
2637 CORO_THROW = 0;
2638 sv_setsv (ERRSV, exception);
2639 croak (0);
2640 }
2641
2642 /* return value handling - mostly like entersub */
2643 /* make sure we put something on the stack in scalar context */
2644 if (GIMME_V == G_SCALAR
2645 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2646 {
2647 dSP;
2648 SV **bot = PL_stack_base + checkmark;
2649
2650 if (sp == bot) /* too few, push undef */
2651 bot [1] = &PL_sv_undef;
2652 else /* too many, take last one */
2653 bot [1] = *sp;
2654
2655 SP = bot + 1;
2656
2657 PUTBACK;
2658 }
2659
2660 return NORMAL;
2661}
2662
2663static void
2664api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2665{
2666 int i;
2667 SV **arg = PL_stack_base + ax;
2668 int items = PL_stack_sp - arg + 1;
2669
2670 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2671
2672 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2673 && PL_op->op_ppaddr != pp_slf)
2674 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2675
2676 CvFLAGS (cv) |= CVf_SLF;
2677 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2678 slf_cv = cv;
2679
2680 /* we patch the op, and then re-run the whole call */
2681 /* we have to put the same argument on the stack for this to work */
2682 /* and this will be done by pp_restore */
2683 slf_restore.op_next = (OP *)&slf_restore;
2684 slf_restore.op_type = OP_CUSTOM;
2685 slf_restore.op_ppaddr = pp_restore;
2686 slf_restore.op_first = PL_op;
2687
2688 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2689
2690 if (PL_op->op_flags & OPf_STACKED)
2691 {
2692 if (items > slf_arga)
2693 {
2694 slf_arga = items;
2695 Safefree (slf_argv);
2696 New (0, slf_argv, slf_arga, SV *);
2697 }
2698
2699 slf_argc = items;
2700
2701 for (i = 0; i < items; ++i)
2702 slf_argv [i] = SvREFCNT_inc (arg [i]);
2703 }
2704 else
2705 slf_argc = 0;
2706
2707 PL_op->op_ppaddr = pp_slf;
2708 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2709
2710 PL_op = (OP *)&slf_restore;
2711}
2712
2713/*****************************************************************************/
2714/* dynamic wind */
2715
2716static void
2717on_enterleave_call (pTHX_ SV *cb)
2718{
2719 dSP;
2720
2721 PUSHSTACK;
2722
2723 PUSHMARK (SP);
2724 PUTBACK;
2725 call_sv (cb, G_VOID | G_DISCARD);
2726 SPAGAIN;
2727
2728 POPSTACK;
2729}
2730
2731static SV *
2732coro_avp_pop_and_free (pTHX_ AV **avp)
2733{
2734 AV *av = *avp;
2735 SV *res = av_pop (av);
2736
2737 if (AvFILLp (av) < 0)
2738 {
2739 *avp = 0;
2740 SvREFCNT_dec (av);
2741 }
2742
2743 return res;
2744}
2745
2746static void
2747coro_pop_on_enter (pTHX_ void *coro)
2748{
2749 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2750 SvREFCNT_dec (cb);
2751}
2752
2753static void
2754coro_pop_on_leave (pTHX_ void *coro)
2755{
2756 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2757 on_enterleave_call (aTHX_ sv_2mortal (cb));
2758}
2759
2760/*****************************************************************************/
2761/* PerlIO::cede */
2762
2763typedef struct
2764{
2765 PerlIOBuf base;
2766 NV next, every;
2767} PerlIOCede;
2768
2769static IV ecb_cold
2770PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2771{
2772 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2773
2774 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2775 self->next = nvtime () + self->every;
2776
2777 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2778}
2779
2780static SV * ecb_cold
2781PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2782{
2783 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2784
2785 return newSVnv (self->every);
2786}
2787
2788static IV
2789PerlIOCede_flush (pTHX_ PerlIO *f)
2790{
2791 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2792 double now = nvtime ();
2793
2794 if (now >= self->next)
2795 {
2796 api_cede (aTHX);
2797 self->next = now + self->every;
2798 }
2799
2800 return PerlIOBuf_flush (aTHX_ f);
2801}
2802
2803static PerlIO_funcs PerlIO_cede =
2804{
2805 sizeof(PerlIO_funcs),
2806 "cede",
2807 sizeof(PerlIOCede),
2808 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2809 PerlIOCede_pushed,
2810 PerlIOBuf_popped,
2811 PerlIOBuf_open,
2812 PerlIOBase_binmode,
2813 PerlIOCede_getarg,
2814 PerlIOBase_fileno,
2815 PerlIOBuf_dup,
2816 PerlIOBuf_read,
2817 PerlIOBuf_unread,
2818 PerlIOBuf_write,
2819 PerlIOBuf_seek,
2820 PerlIOBuf_tell,
2821 PerlIOBuf_close,
2822 PerlIOCede_flush,
2823 PerlIOBuf_fill,
2824 PerlIOBase_eof,
2825 PerlIOBase_error,
2826 PerlIOBase_clearerr,
2827 PerlIOBase_setlinebuf,
2828 PerlIOBuf_get_base,
2829 PerlIOBuf_bufsiz,
2830 PerlIOBuf_get_ptr,
2831 PerlIOBuf_get_cnt,
2832 PerlIOBuf_set_ptrcnt,
2833};
2834
2835/*****************************************************************************/
2836/* Coro::Semaphore & Coro::Signal */
2837
2838static SV *
2839coro_waitarray_new (pTHX_ int count)
2840{
2841 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2842 AV *av = newAV ();
2843 SV **ary;
2844
2845 /* unfortunately, building manually saves memory */
2846 Newx (ary, 2, SV *);
2847 AvALLOC (av) = ary;
2848#if PERL_VERSION_ATLEAST (5,10,0)
2849 AvARRAY (av) = ary;
2850#else
2851 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2852 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2853 SvPVX ((SV *)av) = (char *)ary;
2854#endif
2855 AvMAX (av) = 1;
2856 AvFILLp (av) = 0;
2857 ary [0] = newSViv (count);
2858
2859 return newRV_noinc ((SV *)av);
2860}
2861
2862/* semaphore */
2863
2864static void
2865coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2866{
2867 SV *count_sv = AvARRAY (av)[0];
2868 IV count = SvIVX (count_sv);
2869
2870 count += adjust;
2871 SvIVX (count_sv) = count;
2872
2873 /* now wake up as many waiters as are expected to lock */
2874 while (count > 0 && AvFILLp (av) > 0)
2875 {
2876 SV *cb;
2877
2878 /* swap first two elements so we can shift a waiter */
2879 AvARRAY (av)[0] = AvARRAY (av)[1];
2880 AvARRAY (av)[1] = count_sv;
2881 cb = av_shift (av);
2882
2883 if (SvOBJECT (cb))
2884 {
2885 api_ready (aTHX_ cb);
2886 --count;
2887 }
2888 else if (SvTYPE (cb) == SVt_PVCV)
2889 {
2890 dSP;
2891 PUSHMARK (SP);
2892 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2893 PUTBACK;
2894 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2895 }
2896
2897 SvREFCNT_dec (cb);
2898 }
2899}
2900
2901static void
2902coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2903{
2904 /* call $sem->adjust (0) to possibly wake up some other waiters */
2905 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2906}
2907
2908static int
2909slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2910{
2911 AV *av = (AV *)frame->data;
2912 SV *count_sv = AvARRAY (av)[0];
2913 SV *coro_hv = SvRV (coro_current);
2914
2915 /* if we are about to throw, don't actually acquire the lock, just throw */
2916 if (CORO_THROW)
2917 return 0;
2918 else if (SvIVX (count_sv) > 0)
2919 {
2920 frame->destroy = 0;
2921
2922 if (acquire)
2923 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2924 else
2925 coro_semaphore_adjust (aTHX_ av, 0);
2926
2927 return 0;
2928 }
2929 else
2930 {
2931 int i;
2932 /* if we were woken up but can't down, we look through the whole */
2933 /* waiters list and only add us if we aren't in there already */
2934 /* this avoids some degenerate memory usage cases */
2935 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
2936 if (AvARRAY (av)[i] == coro_hv)
2937 return 1;
2938
2939 av_push (av, SvREFCNT_inc (coro_hv));
2940 return 1;
2941 }
2942}
2943
2944static int
2945slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2946{
2947 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2948}
2949
2950static int
2951slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2952{
2953 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2954}
2955
2956static void
2957slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2958{
2959 AV *av = (AV *)SvRV (arg [0]);
2960
2961 if (SvIVX (AvARRAY (av)[0]) > 0)
2962 {
2963 frame->data = (void *)av;
2964 frame->prepare = prepare_nop;
2965 }
2966 else
2967 {
2968 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2969
2970 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2971 frame->prepare = prepare_schedule;
2972 /* to avoid race conditions when a woken-up coro gets terminated */
2973 /* we arrange for a temporary on_destroy that calls adjust (0) */
2974 frame->destroy = coro_semaphore_destroy;
2975 }
2976}
2977
2978static void
2979slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2980{
2981 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2982 frame->check = slf_check_semaphore_down;
2983}
2984
2985static void
2986slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2987{
2988 if (items >= 2)
2989 {
2990 /* callback form */
2991 AV *av = (AV *)SvRV (arg [0]);
2992 SV *cb_cv = s_get_cv_croak (arg [1]);
2993
2994 av_push (av, SvREFCNT_inc_NN (cb_cv));
2995
2996 if (SvIVX (AvARRAY (av)[0]) > 0)
2997 coro_semaphore_adjust (aTHX_ av, 0);
2998
2999 frame->prepare = prepare_nop;
3000 frame->check = slf_check_nop;
3001 }
3002 else
3003 {
3004 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3005 frame->check = slf_check_semaphore_wait;
3006 }
3007}
3008
3009/* signal */
3010
3011static void
3012coro_signal_wake (pTHX_ AV *av, int count)
3013{
3014 SvIVX (AvARRAY (av)[0]) = 0;
3015
3016 /* now signal count waiters */
3017 while (count > 0 && AvFILLp (av) > 0)
3018 {
3019 SV *cb;
3020
3021 /* swap first two elements so we can shift a waiter */
3022 cb = AvARRAY (av)[0];
3023 AvARRAY (av)[0] = AvARRAY (av)[1];
3024 AvARRAY (av)[1] = cb;
3025
3026 cb = av_shift (av);
3027
3028 if (SvTYPE (cb) == SVt_PVCV)
3029 {
3030 dSP;
3031 PUSHMARK (SP);
3032 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3033 PUTBACK;
3034 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3035 }
3036 else
3037 {
3038 api_ready (aTHX_ cb);
3039 sv_setiv (cb, 0); /* signal waiter */
3040 }
3041
3042 SvREFCNT_dec (cb);
3043
3044 --count;
3045 }
3046}
3047
3048static int
3049slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3050{
3051 /* if we are about to throw, also stop waiting */
3052 return SvROK ((SV *)frame->data) && !CORO_THROW;
3053}
3054
3055static void
3056slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3057{
3058 AV *av = (AV *)SvRV (arg [0]);
3059
3060 if (items >= 2)
3061 {
3062 SV *cb_cv = s_get_cv_croak (arg [1]);
3063 av_push (av, SvREFCNT_inc_NN (cb_cv));
3064
3065 if (SvIVX (AvARRAY (av)[0]))
3066 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3067
3068 frame->prepare = prepare_nop;
3069 frame->check = slf_check_nop;
3070 }
3071 else if (SvIVX (AvARRAY (av)[0]))
3072 {
3073 SvIVX (AvARRAY (av)[0]) = 0;
3074 frame->prepare = prepare_nop;
3075 frame->check = slf_check_nop;
3076 }
3077 else
3078 {
3079 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3080
3081 av_push (av, waiter);
3082
3083 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3084 frame->prepare = prepare_schedule;
3085 frame->check = slf_check_signal_wait;
3086 }
3087}
3088
3089/*****************************************************************************/
3090/* Coro::AIO */
3091
3092#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3093
3094/* helper storage struct */
3095struct io_state
3096{
3097 int errorno;
3098 I32 laststype; /* U16 in 5.10.0 */
3099 int laststatval;
3100 Stat_t statcache;
3101};
3102
3103static void
3104coro_aio_callback (pTHX_ CV *cv)
3105{
3106 dXSARGS;
3107 AV *state = (AV *)S_GENSUB_ARG;
3108 SV *coro = av_pop (state);
3109 SV *data_sv = newSV (sizeof (struct io_state));
3110
3111 av_extend (state, items - 1);
3112
3113 sv_upgrade (data_sv, SVt_PV);
3114 SvCUR_set (data_sv, sizeof (struct io_state));
3115 SvPOK_only (data_sv);
3116
3117 {
3118 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3119
3120 data->errorno = errno;
3121 data->laststype = PL_laststype;
3122 data->laststatval = PL_laststatval;
3123 data->statcache = PL_statcache;
3124 }
3125
3126 /* now build the result vector out of all the parameters and the data_sv */
3127 {
3128 int i;
3129
3130 for (i = 0; i < items; ++i)
3131 av_push (state, SvREFCNT_inc_NN (ST (i)));
3132 }
3133
3134 av_push (state, data_sv);
3135
3136 api_ready (aTHX_ coro);
3137 SvREFCNT_dec (coro);
3138 SvREFCNT_dec ((AV *)state);
3139}
3140
3141static int
3142slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3143{
3144 AV *state = (AV *)frame->data;
3145
3146 /* if we are about to throw, return early */
3147 /* this does not cancel the aio request, but at least */
3148 /* it quickly returns */
3149 if (CORO_THROW)
3150 return 0;
3151
3152 /* one element that is an RV? repeat! */
3153 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3154 return 1;
3155
3156 /* restore status */
3157 {
3158 SV *data_sv = av_pop (state);
3159 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3160
3161 errno = data->errorno;
3162 PL_laststype = data->laststype;
3163 PL_laststatval = data->laststatval;
3164 PL_statcache = data->statcache;
3165
3166 SvREFCNT_dec (data_sv);
3167 }
3168
3169 /* push result values */
3170 {
3171 dSP;
3172 int i;
3173
3174 EXTEND (SP, AvFILLp (state) + 1);
3175 for (i = 0; i <= AvFILLp (state); ++i)
3176 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3177
3178 PUTBACK;
3179 }
825 3180
826 return 0; 3181 return 0;
827} 3182}
828 3183
829static void 3184static void
830api_ready (SV *coro) 3185slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
831{ 3186{
832 coro_enq (SvREFCNT_inc (coro)); 3187 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
833} 3188 SV *coro_hv = SvRV (coro_current);
3189 struct coro *coro = SvSTATE_hv (coro_hv);
834 3190
835static void 3191 /* put our coroutine id on the state arg */
836api_schedule (int cede) 3192 av_push (state, SvREFCNT_inc_NN (coro_hv));
837{
838 SV *prev, *next;
839 3193
840 prev = GvSV (coro_current); 3194 /* first see whether we have a non-zero priority and set it as AIO prio */
3195 if (coro->prio)
3196 {
3197 dSP;
841 3198
842 if (cede) 3199 static SV *prio_cv;
843 coro_enq (SvREFCNT_inc (prev)); 3200 static SV *prio_sv;
844 3201
845 next = coro_deq (PRIO_MIN); 3202 if (ecb_expect_false (!prio_cv))
3203 {
3204 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3205 prio_sv = newSViv (0);
3206 }
846 3207
847 if (!next) 3208 PUSHMARK (SP);
848 next = SvREFCNT_inc (GvSV (coro_idle)); 3209 sv_setiv (prio_sv, coro->prio);
3210 XPUSHs (prio_sv);
849 3211
850 GvSV (coro_current) = SvREFCNT_inc (next); 3212 PUTBACK;
851 transfer (sv_to_coro (prev, "Coro::schedule", "current coroutine"), 3213 call_sv (prio_cv, G_VOID | G_DISCARD);
852 sv_to_coro (next, "Coro::schedule", "next coroutine"), 3214 }
853 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
854 SvREFCNT_dec (next);
855 SvREFCNT_dec (prev);
856}
857 3215
3216 /* now call the original request */
3217 {
3218 dSP;
3219 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3220 int i;
3221
3222 PUSHMARK (SP);
3223
3224 /* first push all args to the stack */
3225 EXTEND (SP, items + 1);
3226
3227 for (i = 0; i < items; ++i)
3228 PUSHs (arg [i]);
3229
3230 /* now push the callback closure */
3231 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3232
3233 /* now call the AIO function - we assume our request is uncancelable */
3234 PUTBACK;
3235 call_sv ((SV *)req, G_VOID | G_DISCARD);
3236 }
3237
3238 /* now that the request is going, we loop till we have a result */
3239 frame->data = (void *)state;
3240 frame->prepare = prepare_schedule;
3241 frame->check = slf_check_aio_req;
3242}
3243
3244static void
3245coro_aio_req_xs (pTHX_ CV *cv)
3246{
3247 dXSARGS;
3248
3249 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3250
3251 XSRETURN_EMPTY;
3252}
3253
3254/*****************************************************************************/
3255
3256#if CORO_CLONE
3257# include "clone.c"
3258#endif
3259
3260/*****************************************************************************/
3261
3262static SV *
3263coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3264{
3265 SV *coro_sv;
3266 struct coro *coro;
3267 MAGIC *mg;
3268 HV *hv;
3269 SV *cb;
3270 int i;
3271
3272 if (argc > 0)
3273 {
3274 cb = s_get_cv_croak (argv [0]);
3275
3276 if (!is_coro)
3277 {
3278 if (CvISXSUB (cb))
3279 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3280
3281 if (!CvROOT (cb))
3282 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3283 }
3284 }
3285
3286 Newz (0, coro, 1, struct coro);
3287 coro->args = newAV ();
3288 coro->flags = CF_NEW;
3289
3290 if (coro_first) coro_first->prev = coro;
3291 coro->next = coro_first;
3292 coro_first = coro;
3293
3294 coro->hv = hv = newHV ();
3295 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3296 mg->mg_flags |= MGf_DUP;
3297 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3298
3299 if (argc > 0)
3300 {
3301 av_extend (coro->args, argc + is_coro - 1);
3302
3303 if (is_coro)
3304 {
3305 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3306 cb = (SV *)cv_coro_run;
3307 }
3308
3309 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3310
3311 for (i = 1; i < argc; i++)
3312 av_push (coro->args, newSVsv (argv [i]));
3313 }
3314
3315 return coro_sv;
3316}
3317
3318#ifndef __cplusplus
3319ecb_cold XS(boot_Coro__State);
3320#endif
3321
3322#if CORO_JIT
3323
3324static void ecb_noinline ecb_cold
3325pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3326{
3327 dSP;
3328 AV *av = newAV ();
3329
3330 av_store (av, 3, newSVuv (d));
3331 av_store (av, 2, newSVuv (c));
3332 av_store (av, 1, newSVuv (b));
3333 av_store (av, 0, newSVuv (a));
3334
3335 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3336
3337 PUTBACK;
3338}
3339
3340static void ecb_noinline ecb_cold
3341jit_init (pTHX)
3342{
3343 dSP;
3344 SV *load, *save;
3345 char *map_base;
3346 char *load_ptr, *save_ptr;
3347 STRLEN load_len, save_len, map_len;
3348 int count;
3349
3350 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3351
3352 PUSHMARK (SP);
3353 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3354 #include "state.h"
3355 count = call_pv ("Coro::State::_jit", G_ARRAY);
3356 SPAGAIN;
3357
3358 save = POPs; save_ptr = SvPVbyte (save, save_len);
3359 load = POPs; load_ptr = SvPVbyte (load, load_len);
3360
3361 map_len = load_len + save_len + 16;
3362
3363 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3364
3365 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3366
3367 load_perl_slots = (load_save_perl_slots_type)map_base;
3368 memcpy (map_base, load_ptr, load_len);
3369
3370 map_base += (load_len + 15) & ~15;
3371
3372 save_perl_slots = (load_save_perl_slots_type)map_base;
3373 memcpy (map_base, save_ptr, save_len);
3374
3375 /* we are good citizens and try to make the page read-only, so the evil evil */
3376 /* hackers might have it a bit more difficult */
3377 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3378
3379 PUTBACK;
3380 eval_pv ("undef &Coro::State::_jit", 1);
3381}
3382
3383#endif
3384
858MODULE = Coro::State PACKAGE = Coro::State 3385MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
859 3386
860PROTOTYPES: ENABLE 3387PROTOTYPES: DISABLE
861 3388
862BOOT: 3389BOOT:
863{ /* {} necessary for stoopid perl-5.6.x */ 3390{
864 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 3391#ifdef USE_ITHREADS
865 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 3392# if CORO_PTHREAD
3393 coro_thx = PERL_GET_CONTEXT;
3394# endif
3395#endif
3396 /* perl defines these to check for existance first, but why it doesn't */
3397 /* just create them one at init time is not clear to me, except for */
3398 /* programs trying to delete them, but... */
3399 /* anyway, we declare this as invalid and make sure they are initialised here */
3400 DEFSV;
3401 ERRSV;
3402
3403 cctx_current = cctx_new_empty ();
3404
3405 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3406 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3407
3408 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3409 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3410 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3411
3412 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3413 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3414 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3415
866 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3416 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
867 3417
868 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3418 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
869 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3419 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
870 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3420 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
871 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 3421 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
872
873 if (!padlist_cache)
874 padlist_cache = newHV ();
875 3422
876 main_mainstack = PL_mainstack; 3423 main_mainstack = PL_mainstack;
3424 main_top_env = PL_top_env;
877 3425
3426 while (main_top_env->je_prev)
3427 main_top_env = main_top_env->je_prev;
3428
3429 {
3430 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3431
3432 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3433 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3434
3435 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3436 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3437 }
3438
878 coroapi.ver = CORO_API_VERSION; 3439 coroapi.ver = CORO_API_VERSION;
3440 coroapi.rev = CORO_API_REVISION;
3441
879 coroapi.transfer = api_transfer; 3442 coroapi.transfer = api_transfer;
880}
881 3443
882Coro::State 3444 coroapi.sv_state = SvSTATE_;
883_newprocess(args) 3445 coroapi.execute_slf = api_execute_slf;
884 SV * args 3446 coroapi.prepare_nop = prepare_nop;
3447 coroapi.prepare_schedule = prepare_schedule;
3448 coroapi.prepare_cede = prepare_cede;
3449 coroapi.prepare_cede_notself = prepare_cede_notself;
3450
3451 time_init (aTHX);
3452
3453 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3454#if CORO_JIT
3455 PUTBACK;
3456 jit_init (aTHX);
3457 SPAGAIN;
3458#endif
3459}
3460
3461SV *
3462new (SV *klass, ...)
3463 ALIAS:
3464 Coro::new = 1
3465 CODE:
3466 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
3467 OUTPUT:
3468 RETVAL
3469
3470void
3471transfer (...)
3472 PROTOTYPE: $$
3473 CODE:
3474 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3475
3476SV *
3477clone (Coro::State coro)
3478 CODE:
3479{
3480#if CORO_CLONE
3481 struct coro *ncoro = coro_clone (aTHX_ coro);
3482 MAGIC *mg;
3483 /* TODO: too much duplication */
3484 ncoro->hv = newHV ();
3485 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3486 mg->mg_flags |= MGf_DUP;
3487 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3488#else
3489 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3490#endif
3491}
3492 OUTPUT:
3493 RETVAL
3494
3495int
3496cctx_stacksize (int new_stacksize = 0)
3497 PROTOTYPE: ;$
3498 CODE:
3499 RETVAL = cctx_stacksize;
3500 if (new_stacksize)
3501 {
3502 cctx_stacksize = new_stacksize;
3503 ++cctx_gen;
3504 }
3505 OUTPUT:
3506 RETVAL
3507
3508int
3509cctx_max_idle (int max_idle = 0)
3510 PROTOTYPE: ;$
3511 CODE:
3512 RETVAL = cctx_max_idle;
3513 if (max_idle > 1)
3514 cctx_max_idle = max_idle;
3515 OUTPUT:
3516 RETVAL
3517
3518int
3519cctx_count ()
3520 PROTOTYPE:
3521 CODE:
3522 RETVAL = cctx_count;
3523 OUTPUT:
3524 RETVAL
3525
3526int
3527cctx_idle ()
3528 PROTOTYPE:
3529 CODE:
3530 RETVAL = cctx_idle;
3531 OUTPUT:
3532 RETVAL
3533
3534void
3535list ()
3536 PROTOTYPE:
3537 PPCODE:
3538{
3539 struct coro *coro;
3540 for (coro = coro_first; coro; coro = coro->next)
3541 if (coro->hv)
3542 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3543}
3544
3545void
3546call (Coro::State coro, SV *coderef)
3547 ALIAS:
3548 eval = 1
3549 CODE:
3550{
3551 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3552 {
3553 struct coro *current = SvSTATE_current;
3554 struct CoroSLF slf_save;
3555
3556 if (current != coro)
3557 {
3558 PUTBACK;
3559 save_perl (aTHX_ current);
3560 load_perl (aTHX_ coro);
3561 /* the coro is most likely in an active SLF call.
3562 * while not strictly required (the code we execute is
3563 * not allowed to call any SLF functions), it's cleaner
3564 * to reinitialise the slf_frame and restore it later.
3565 * This might one day allow us to actually do SLF calls
3566 * from code executed here.
3567 */
3568 slf_save = slf_frame;
3569 slf_frame.prepare = 0;
3570 SPAGAIN;
3571 }
3572
3573 PUSHSTACK;
3574
3575 PUSHMARK (SP);
3576 PUTBACK;
3577
3578 if (ix)
3579 eval_sv (coderef, 0);
3580 else
3581 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3582
3583 POPSTACK;
3584 SPAGAIN;
3585
3586 if (current != coro)
3587 {
3588 PUTBACK;
3589 slf_frame = slf_save;
3590 save_perl (aTHX_ coro);
3591 load_perl (aTHX_ current);
3592 SPAGAIN;
3593 }
3594 }
3595}
3596
3597SV *
3598is_ready (Coro::State coro)
885 PROTOTYPE: $ 3599 PROTOTYPE: $
3600 ALIAS:
3601 is_ready = CF_READY
3602 is_running = CF_RUNNING
3603 is_new = CF_NEW
3604 is_destroyed = CF_ZOMBIE
3605 is_zombie = CF_ZOMBIE
3606 is_suspended = CF_SUSPENDED
3607 CODE:
3608 RETVAL = boolSV (coro->flags & ix);
3609 OUTPUT:
3610 RETVAL
3611
3612void
3613throw (SV *self, SV *exception = &PL_sv_undef)
3614 PROTOTYPE: $;$
886 CODE: 3615 CODE:
887 Coro__State coro; 3616{
3617 struct coro *coro = SvSTATE (self);
3618 struct coro *current = SvSTATE_current;
3619 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3620 SvREFCNT_dec (*exceptionp);
3621 SvGETMAGIC (exception);
3622 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
888 3623
889 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 3624 api_ready (aTHX_ self);
890 croak ("Coro::State::_newprocess expects an arrayref"); 3625}
3626
3627void
3628api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3629 PROTOTYPE: $;$
3630 C_ARGS: aTHX_ coro, flags
3631
3632SV *
3633has_cctx (Coro::State coro)
3634 PROTOTYPE: $
3635 CODE:
3636 /* maybe manage the running flag differently */
3637 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3638 OUTPUT:
3639 RETVAL
3640
3641int
3642is_traced (Coro::State coro)
3643 PROTOTYPE: $
3644 CODE:
3645 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3646 OUTPUT:
3647 RETVAL
3648
3649UV
3650rss (Coro::State coro)
3651 PROTOTYPE: $
3652 ALIAS:
3653 usecount = 1
3654 CODE:
3655 switch (ix)
3656 {
3657 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3658 case 1: RETVAL = coro->usecount; break;
891 3659 }
892 New (0, coro, 1, struct coro); 3660 OUTPUT:
893
894 coro->args = (AV *)SvREFCNT_inc (SvRV (args));
895 coro->mainstack = 0; /* actual work is done inside transfer */
896 coro->stack = 0;
897
898 RETVAL = coro; 3661 RETVAL
3662
3663void
3664force_cctx ()
3665 PROTOTYPE:
3666 CODE:
3667 cctx_current->idle_sp = 0;
3668
3669void
3670swap_defsv (Coro::State self)
3671 PROTOTYPE: $
3672 ALIAS:
3673 swap_defav = 1
3674 CODE:
3675 if (!self->slot)
3676 croak ("cannot swap state with coroutine that has no saved state,");
3677 else
3678 {
3679 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3680 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3681
3682 SV *tmp = *src; *src = *dst; *dst = tmp;
3683 }
3684
3685void
3686cancel (Coro::State self)
3687 CODE:
3688 coro_state_destroy (aTHX_ self);
3689
3690SV *
3691enable_times (int enabled = enable_times)
3692 CODE:
3693{
3694 RETVAL = boolSV (enable_times);
3695
3696 if (enabled != enable_times)
3697 {
3698 enable_times = enabled;
3699
3700 coro_times_update ();
3701 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3702 }
3703}
899 OUTPUT: 3704 OUTPUT:
900 RETVAL 3705 RETVAL
901 3706
902void 3707void
903transfer(prev, next, flags) 3708times (Coro::State self)
904 Coro::State_or_hashref prev 3709 PPCODE:
905 Coro::State_or_hashref next 3710{
906 int flags 3711 struct coro *current = SvSTATE (coro_current);
907 PROTOTYPE: @ 3712
3713 if (ecb_expect_false (current == self))
3714 {
3715 coro_times_update ();
3716 coro_times_add (SvSTATE (coro_current));
3717 }
3718
3719 EXTEND (SP, 2);
3720 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3721 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3722
3723 if (ecb_expect_false (current == self))
3724 coro_times_sub (SvSTATE (coro_current));
3725}
3726
3727void
3728swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3729 CODE:
3730{
3731 struct coro *current = SvSTATE_current;
3732
3733 if (current == coro)
3734 SWAP_SVS (current);
3735
3736 if (!coro->swap_sv)
3737 coro->swap_sv = newAV ();
3738
3739 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3740 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3741
3742 if (current == coro)
3743 SWAP_SVS (current);
3744}
3745
3746
3747MODULE = Coro::State PACKAGE = Coro
3748
3749BOOT:
3750{
3751 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3752 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3753 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3754 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3755 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3756 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3757 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3758 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3759
3760 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3761 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3762 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3763 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3764
3765 coro_stash = gv_stashpv ("Coro", TRUE);
3766
3767 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
3768 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
3769 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
3770 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
3771 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
3772 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
3773
3774 {
3775 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
3776
3777 coroapi.schedule = api_schedule;
3778 coroapi.schedule_to = api_schedule_to;
3779 coroapi.cede = api_cede;
3780 coroapi.cede_notself = api_cede_notself;
3781 coroapi.ready = api_ready;
3782 coroapi.is_ready = api_is_ready;
3783 coroapi.nready = coro_nready;
3784 coroapi.current = coro_current;
3785
3786 /*GCoroAPI = &coroapi;*/
3787 sv_setiv (sv, (IV)&coroapi);
3788 SvREADONLY_on (sv);
3789 }
3790}
3791
3792SV *
3793async (...)
3794 PROTOTYPE: &@
908 CODE: 3795 CODE:
909 PUTBACK; 3796 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
910 transfer (aTHX_ prev, next, flags); 3797 api_ready (aTHX_ RETVAL);
911 SPAGAIN; 3798 OUTPUT:
3799 RETVAL
912 3800
913void 3801void
914DESTROY(coro) 3802_destroy (Coro::State coro)
915 Coro::State coro 3803 CODE:
916 CODE: 3804 /* used by the manager thread */
917 3805 coro_state_destroy (aTHX_ coro);
918 if (coro->mainstack && coro->mainstack != main_mainstack)
919 {
920 struct coro temp;
921
922 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
923 LOAD(aTHX_ coro);
924
925 destroy_stacks (aTHX);
926
927 LOAD((&temp)); /* this will get rid of defsv etc.. */
928
929 coro->mainstack = 0;
930 }
931
932 deallocate_stack (coro);
933
934 Safefree (coro);
935 3806
936void 3807void
937flush() 3808on_destroy (Coro::State coro, SV *cb)
938 CODE: 3809 CODE:
939#ifdef MAY_FLUSH 3810 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
940 flush_padlist_cache ();
941#endif
942 3811
943void 3812void
944_exit(code) 3813join (...)
945 int code 3814 CODE:
3815 CORO_EXECUTE_SLF_XS (slf_init_join);
3816
3817void
3818terminate (...)
3819 CODE:
3820 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3821
3822void
3823cancel (...)
3824 CODE:
3825 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3826
3827int
3828safe_cancel (Coro::State self, ...)
3829 C_ARGS: aTHX_ self, &ST (1), items - 1
3830
3831void
3832schedule (...)
3833 CODE:
3834 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3835
3836void
3837schedule_to (...)
3838 CODE:
3839 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3840
3841void
3842cede_to (...)
3843 CODE:
3844 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3845
3846void
3847cede (...)
3848 CODE:
3849 CORO_EXECUTE_SLF_XS (slf_init_cede);
3850
3851void
3852cede_notself (...)
3853 CODE:
3854 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3855
3856void
3857_set_current (SV *current)
946 PROTOTYPE: $ 3858 PROTOTYPE: $
947 CODE: 3859 CODE:
948#if defined(__GLIBC__) || _POSIX_C_SOURCE 3860 SvREFCNT_dec (SvRV (coro_current));
949 _exit (code); 3861 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
950#else
951 signal (SIGTERM, SIG_DFL);
952 raise (SIGTERM);
953 exit (code);
954#endif
955
956MODULE = Coro::State PACKAGE = Coro::Cont
957
958# this is slightly dirty (should expose a c-level api)
959 3862
960void 3863void
961yield(...) 3864_set_readyhook (SV *hook)
962 PROTOTYPE: @ 3865 PROTOTYPE: $
963 CODE: 3866 CODE:
964 static SV *returnstk;
965 SV *sv;
966 AV *defav = GvAV (PL_defgv);
967 struct coro *prev, *next;
968
969 if (!returnstk)
970 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
971
972 /* set up @_ -- ugly */
973 av_clear (defav);
974 av_fill (defav, items - 1);
975 while (items--)
976 av_store (defav, items, SvREFCNT_inc (ST(items)));
977
978 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
979 sv = av_pop ((AV *)SvRV (returnstk));
980 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
981 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
982 SvREFCNT_dec (sv); 3867 SvREFCNT_dec (coro_readyhook);
983 3868 SvGETMAGIC (hook);
984 transfer(aTHX_ prev, next, 0); 3869 if (SvOK (hook))
985 3870 {
986MODULE = Coro::State PACKAGE = Coro
987
988# this is slightly dirty (should expose a c-level api)
989
990BOOT:
991{
992 int i;
993 HV *stash = gv_stashpv ("Coro", TRUE);
994
995 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
996 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
997 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
998 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
999 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1000 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1001
1002 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1003 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1004
1005 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1006 coro_ready[i] = newAV (); 3871 coro_readyhook = newSVsv (hook);
1007 3872 CORO_READYHOOK = invoke_sv_ready_hook_helper;
1008 {
1009 SV *sv = perl_get_sv("Coro::API", 1);
1010
1011 coroapi.schedule = api_schedule;
1012 coroapi.ready = api_ready;
1013 coroapi.nready = &coro_nready;
1014 coroapi.current = coro_current;
1015
1016 GCoroAPI = &coroapi;
1017 sv_setiv(sv, (IV)&coroapi);
1018 SvREADONLY_on(sv);
1019 } 3873 }
1020} 3874 else
3875 {
3876 coro_readyhook = 0;
3877 CORO_READYHOOK = 0;
3878 }
1021 3879
1022void 3880int
3881prio (Coro::State coro, int newprio = 0)
3882 PROTOTYPE: $;$
3883 ALIAS:
3884 nice = 1
3885 CODE:
3886{
3887 RETVAL = coro->prio;
3888
3889 if (items > 1)
3890 {
3891 if (ix)
3892 newprio = coro->prio - newprio;
3893
3894 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
3895 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
3896
3897 coro->prio = newprio;
3898 }
3899}
3900 OUTPUT:
3901 RETVAL
3902
3903SV *
1023ready(self) 3904ready (SV *self)
1024 SV * self 3905 PROTOTYPE: $
1025 CODE: 3906 CODE:
1026 api_ready (self); 3907 RETVAL = boolSV (api_ready (aTHX_ self));
3908 OUTPUT:
3909 RETVAL
1027 3910
1028int 3911int
1029nready(...) 3912nready (...)
1030 PROTOTYPE: 3913 PROTOTYPE:
1031 CODE: 3914 CODE:
1032 RETVAL = coro_nready; 3915 RETVAL = coro_nready;
1033 OUTPUT: 3916 OUTPUT:
1034 RETVAL 3917 RETVAL
1035 3918
1036void 3919void
1037schedule(...) 3920suspend (Coro::State self)
1038 PROTOTYPE: 3921 PROTOTYPE: $
1039 ALIAS:
1040 cede = 1
1041 CODE: 3922 CODE:
1042 api_schedule (ix); 3923 self->flags |= CF_SUSPENDED;
1043 3924
3925void
3926resume (Coro::State self)
3927 PROTOTYPE: $
3928 CODE:
3929 self->flags &= ~CF_SUSPENDED;
3930
3931void
3932_pool_handler (...)
3933 CODE:
3934 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3935
3936void
3937async_pool (SV *cv, ...)
3938 PROTOTYPE: &@
3939 PPCODE:
3940{
3941 HV *hv = (HV *)av_pop (av_async_pool);
3942 AV *av = newAV ();
3943 SV *cb = ST (0);
3944 int i;
3945
3946 av_extend (av, items - 2);
3947 for (i = 1; i < items; ++i)
3948 av_push (av, SvREFCNT_inc_NN (ST (i)));
3949
3950 if ((SV *)hv == &PL_sv_undef)
3951 {
3952 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3953 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3954 SvREFCNT_dec (sv);
3955 }
3956
3957 {
3958 struct coro *coro = SvSTATE_hv (hv);
3959
3960 assert (!coro->invoke_cb);
3961 assert (!coro->invoke_av);
3962 coro->invoke_cb = SvREFCNT_inc (cb);
3963 coro->invoke_av = av;
3964 }
3965
3966 api_ready (aTHX_ (SV *)hv);
3967
3968 if (GIMME_V != G_VOID)
3969 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3970 else
3971 SvREFCNT_dec (hv);
3972}
3973
3974SV *
3975rouse_cb ()
3976 PROTOTYPE:
3977 CODE:
3978 RETVAL = coro_new_rouse_cb (aTHX);
3979 OUTPUT:
3980 RETVAL
3981
3982void
3983rouse_wait (...)
3984 PROTOTYPE: ;$
3985 PPCODE:
3986 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3987
3988void
3989on_enter (SV *block)
3990 ALIAS:
3991 on_leave = 1
3992 PROTOTYPE: &
3993 CODE:
3994{
3995 struct coro *coro = SvSTATE_current;
3996 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3997
3998 block = s_get_cv_croak (block);
3999
4000 if (!*avp)
4001 *avp = newAV ();
4002
4003 av_push (*avp, SvREFCNT_inc (block));
4004
4005 if (!ix)
4006 on_enterleave_call (aTHX_ block);
4007
4008 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4009 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4010 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4011}
4012
4013
4014MODULE = Coro::State PACKAGE = PerlIO::cede
4015
4016BOOT:
4017 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4018
4019
4020MODULE = Coro::State PACKAGE = Coro::Semaphore
4021
4022SV *
4023new (SV *klass, SV *count = 0)
4024 CODE:
4025{
4026 int semcnt = 1;
4027
4028 if (count)
4029 {
4030 SvGETMAGIC (count);
4031
4032 if (SvOK (count))
4033 semcnt = SvIV (count);
4034 }
4035
4036 RETVAL = sv_bless (
4037 coro_waitarray_new (aTHX_ semcnt),
4038 GvSTASH (CvGV (cv))
4039 );
4040}
4041 OUTPUT:
4042 RETVAL
4043
4044# helper for Coro::Channel and others
4045SV *
4046_alloc (int count)
4047 CODE:
4048 RETVAL = coro_waitarray_new (aTHX_ count);
4049 OUTPUT:
4050 RETVAL
4051
4052SV *
4053count (SV *self)
4054 CODE:
4055 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4056 OUTPUT:
4057 RETVAL
4058
4059void
4060up (SV *self, int adjust = 1)
4061 ALIAS:
4062 adjust = 1
4063 CODE:
4064 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4065
4066void
4067down (...)
4068 CODE:
4069 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4070
4071void
4072wait (...)
4073 CODE:
4074 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4075
4076void
4077try (SV *self)
4078 PPCODE:
4079{
4080 AV *av = (AV *)SvRV (self);
4081 SV *count_sv = AvARRAY (av)[0];
4082 IV count = SvIVX (count_sv);
4083
4084 if (count > 0)
4085 {
4086 --count;
4087 SvIVX (count_sv) = count;
4088 XSRETURN_YES;
4089 }
4090 else
4091 XSRETURN_NO;
4092}
4093
4094void
4095waiters (SV *self)
4096 PPCODE:
4097{
4098 AV *av = (AV *)SvRV (self);
4099 int wcount = AvFILLp (av) + 1 - 1;
4100
4101 if (GIMME_V == G_SCALAR)
4102 XPUSHs (sv_2mortal (newSViv (wcount)));
4103 else
4104 {
4105 int i;
4106 EXTEND (SP, wcount);
4107 for (i = 1; i <= wcount; ++i)
4108 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4109 }
4110}
4111
4112MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4113
4114void
4115_may_delete (SV *sem, int count, unsigned int extra_refs)
4116 PPCODE:
4117{
4118 AV *av = (AV *)SvRV (sem);
4119
4120 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4121 && AvFILLp (av) == 0 /* no waiters, just count */
4122 && SvIV (AvARRAY (av)[0]) == count)
4123 XSRETURN_YES;
4124
4125 XSRETURN_NO;
4126}
4127
4128MODULE = Coro::State PACKAGE = Coro::Signal
4129
4130SV *
4131new (SV *klass)
4132 CODE:
4133 RETVAL = sv_bless (
4134 coro_waitarray_new (aTHX_ 0),
4135 GvSTASH (CvGV (cv))
4136 );
4137 OUTPUT:
4138 RETVAL
4139
4140void
4141wait (...)
4142 CODE:
4143 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4144
4145void
4146broadcast (SV *self)
4147 CODE:
4148{
4149 AV *av = (AV *)SvRV (self);
4150 coro_signal_wake (aTHX_ av, AvFILLp (av));
4151}
4152
4153void
4154send (SV *self)
4155 CODE:
4156{
4157 AV *av = (AV *)SvRV (self);
4158
4159 if (AvFILLp (av))
4160 coro_signal_wake (aTHX_ av, 1);
4161 else
4162 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4163}
4164
4165IV
4166awaited (SV *self)
4167 CODE:
4168 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4169 OUTPUT:
4170 RETVAL
4171
4172
4173MODULE = Coro::State PACKAGE = Coro::AnyEvent
4174
4175BOOT:
4176 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4177
4178void
4179_schedule (...)
4180 CODE:
4181{
4182 static int incede;
4183
4184 api_cede_notself (aTHX);
4185
4186 ++incede;
4187 while (coro_nready >= incede && api_cede (aTHX))
4188 ;
4189
4190 sv_setsv (sv_activity, &PL_sv_undef);
4191 if (coro_nready >= incede)
4192 {
4193 PUSHMARK (SP);
4194 PUTBACK;
4195 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4196 }
4197
4198 --incede;
4199}
4200
4201
4202MODULE = Coro::State PACKAGE = Coro::AIO
4203
4204void
4205_register (char *target, char *proto, SV *req)
4206 CODE:
4207{
4208 SV *req_cv = s_get_cv_croak (req);
4209 /* newXSproto doesn't return the CV on 5.8 */
4210 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4211 sv_setpv ((SV *)slf_cv, proto);
4212 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4213}
4214
4215MODULE = Coro::State PACKAGE = Coro::Select
4216
4217void
4218patch_pp_sselect ()
4219 CODE:
4220 if (!coro_old_pp_sselect)
4221 {
4222 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4223 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4224 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4225 }
4226
4227void
4228unpatch_pp_sselect ()
4229 CODE:
4230 if (coro_old_pp_sselect)
4231 {
4232 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4233 coro_old_pp_sselect = 0;
4234 }
4235
4236MODULE = Coro::State PACKAGE = Coro::Util
4237
4238void
4239_exit (int code)
4240 CODE:
4241 _exit (code);
4242
4243NV
4244time ()
4245 CODE:
4246 RETVAL = nvtime (aTHX);
4247 OUTPUT:
4248 RETVAL
4249
4250NV
4251gettimeofday ()
4252 PPCODE:
4253{
4254 UV tv [2];
4255 u2time (aTHX_ tv);
4256 EXTEND (SP, 2);
4257 PUSHs (sv_2mortal (newSVuv (tv [0])));
4258 PUSHs (sv_2mortal (newSVuv (tv [1])));
4259}
4260

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