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Comparing Coro/Coro/State.xs (file contents):
Revision 1.129 by root, Fri Dec 22 04:34:04 2006 UTC vs.
Revision 1.432 by root, Wed May 8 00:44:44 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
1#include "libcoro/coro.c" 6#include "libcoro/coro.c"
7
8#define PERL_NO_GET_CONTEXT
9#define PERL_EXT
2 10
3#include "EXTERN.h" 11#include "EXTERN.h"
4#include "perl.h" 12#include "perl.h"
5#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
6 15
7#include "patchlevel.h" 16#include "schmorp.h"
8 17
18#define ECB_NO_THREADS 1
19#include "ecb.h"
20
21#include <stddef.h>
9#include <stdio.h> 22#include <stdio.h>
10#include <errno.h> 23#include <errno.h>
11#include <assert.h> 24#include <assert.h>
12 25
13#ifdef HAVE_MMAP 26#ifndef SVs_PADSTALE
14# include <unistd.h> 27# define SVs_PADSTALE 0
15# include <sys/mman.h>
16# ifndef MAP_ANONYMOUS
17# ifdef MAP_ANON
18# define MAP_ANONYMOUS MAP_ANON
19# else
20# undef HAVE_MMAP
21# endif 28#endif
29
30#ifdef PadARRAY
31# define NEWPADAPI
32# define newPADLIST(var) (Newz (0, var, 1, PADLIST), Newx (PadlistARRAY (var), 2, PAD *))
33#else
34typedef AV PADNAMELIST;
35# if !PERL_VERSION_ATLEAST(5,8,0)
36typedef AV PADLIST;
37typedef AV PAD;
22# endif 38# endif
23# include <limits.h> 39# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
24# ifndef PAGESIZE 40# define PadlistMAX(pl) AvFILLp (pl)
25# define PAGESIZE pagesize 41# define PadlistNAMES(pl) (*PadlistARRAY (pl))
26# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 42# define PadARRAY AvARRAY
27static long pagesize; 43# define PadMAX AvFILLp
28# else 44# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
29# define BOOT_PAGESIZE (void)0
30# endif 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 */
31#else 53#else
32# define PAGESIZE 0 54# include <inttypes.h> /* most portable stdint.h */
33# define BOOT_PAGESIZE (void)0
34#endif 55#endif
35 56
36#if USE_VALGRIND 57/* the maximum number of idle cctx that will be pooled */
37# include <valgrind/valgrind.h> 58static int cctx_max_idle = 4;
59
60#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
61# define HAS_SCOPESTACK_NAME 1
38#endif 62#endif
39 63
40/* the maximum number of idle cctx that will be pooled */ 64/* prefer perl internal functions over our own? */
41#define MAX_IDLE_CCTX 8 65#ifndef CORO_PREFER_PERL_FUNCTIONS
42 66# define CORO_PREFER_PERL_FUNCTIONS 0
43#define PERL_VERSION_ATLEAST(a,b,c) \
44 (PERL_REVISION > (a) \
45 || (PERL_REVISION == (a) \
46 && (PERL_VERSION > (b) \
47 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
48
49#if !PERL_VERSION_ATLEAST (5,6,0)
50# ifndef PL_ppaddr
51# define PL_ppaddr ppaddr
52# endif 67#endif
53# ifndef call_sv 68
54# define call_sv perl_call_sv 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)
55# endif 77#endif
56# ifndef get_sv 78
57# define get_sv perl_get_sv 79#define IN_DESTRUCT PL_dirty
58# endif 80
59# ifndef get_cv 81#include "CoroAPI.h"
60# define get_cv perl_get_cv 82#define GCoroAPI (&coroapi) /* very sneaky */
61# endif 83
62# ifndef IS_PADGV 84#ifdef USE_ITHREADS
63# define IS_PADGV(v) 0 85# if CORO_PTHREAD
64# endif 86static void *coro_thx;
65# ifndef IS_PADCONST
66# define IS_PADCONST(v) 0
67# endif 87# endif
68#endif 88#endif
69 89
70/* 5.8.7 */ 90#ifdef __linux
71#ifndef SvRV_set 91# include <time.h> /* for timespec */
72# define SvRV_set(s,v) SvRV(s) = (v) 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
73#endif 98#endif
74 99
75#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 100static double (*nvtime)(); /* so why doesn't it take void? */
76# undef STACKGUARD 101static void (*u2time)(pTHX_ UV ret[2]);
77#endif
78 102
79#ifndef STACKGUARD 103/* we hijack an hopefully unused CV flag for our purposes */
80# define STACKGUARD 0 104#define CVf_SLF 0x4000
81#endif 105static OP *pp_slf (pTHX);
106static void slf_destroy (pTHX_ struct coro *coro);
82 107
83/* prefer perl internal functions over our own? */ 108static U32 cctx_gen;
84#ifndef PREFER_PERL_FUNCTIONS 109static size_t cctx_stacksize = CORO_STACKSIZE;
85# define PREFER_PERL_FUNCTIONS 0
86#endif
87
88/* The next macro should declare a variable stacklevel that contains and approximation
89 * to the current C stack pointer. Its property is that it changes with each call
90 * and should be unique. */
91#define dSTACKLEVEL int stacklevel
92#define STACKLEVEL ((void *)&stacklevel)
93
94#define IN_DESTRUCT (PL_main_cv == Nullcv)
95
96#if __GNUC__ >= 3
97# define attribute(x) __attribute__(x)
98#else
99# define attribute(x)
100#endif
101
102#define NOINLINE attribute ((noinline))
103
104#include "CoroAPI.h"
105
106#ifdef USE_ITHREADS
107static perl_mutex coro_mutex;
108# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
109# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
110#else
111# define LOCK (void)0
112# define UNLOCK (void)0
113#endif
114
115struct io_state
116{
117 int errorno;
118 I32 laststype;
119 int laststatval;
120 Stat_t statcache;
121};
122
123static struct CoroAPI coroapi; 110static struct CoroAPI coroapi;
124static AV *main_mainstack; /* used to differentiate between $main and others */ 111static AV *main_mainstack; /* used to differentiate between $main and others */
112static JMPENV *main_top_env;
125static HV *coro_state_stash, *coro_stash; 113static HV *coro_state_stash, *coro_stash;
126static SV *coro_mortal; /* will be freed after next transfer */ 114static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
115
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;
127 142
128static struct coro_cctx *cctx_first; 143static struct coro_cctx *cctx_first;
129static int cctx_count, cctx_idle; 144static int cctx_count, cctx_idle;
130 145
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
131/* this is a structure representing a c-level coroutine */ 156/* this is a structure representing a c-level coroutine */
132typedef struct coro_cctx { 157typedef struct coro_cctx
158{
133 struct coro_cctx *next; 159 struct coro_cctx *next;
134 160
135 /* the stack */ 161 /* the stack */
136 void *sptr; 162 struct coro_stack stack;
137 long ssize; /* positive == mmap, otherwise malloc */
138 163
139 /* cpu state */ 164 /* cpu state */
140 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 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
141 JMPENV *top_env; 169 JMPENV *top_env;
142 coro_context cctx; 170 coro_context cctx;
143 171
144 int inuse; 172 U32 gen;
145
146#if USE_VALGRIND 173#if CORO_USE_VALGRIND
147 int valgrind_id; 174 int valgrind_id;
148#endif 175#endif
176 unsigned char flags;
149} coro_cctx; 177} coro_cctx;
150 178
179static coro_cctx *cctx_current; /* the currently running cctx */
180
181/*****************************************************************************/
182
183static MGVTBL coro_state_vtbl;
184
151enum { 185enum
186{
152 CF_RUNNING = 0x0001, /* coroutine is running */ 187 CF_RUNNING = 0x0001, /* coroutine is running */
153 CF_READY = 0x0002, /* coroutine is ready */ 188 CF_READY = 0x0002, /* coroutine is ready */
154 CF_NEW = 0x0004, /* ahs never been switched to */ 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) */
155}; 193};
156 194
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
157/* this is a structure representing a perl-level coroutine */ 205/* this is a structure representing a perl-level coroutine */
158struct coro { 206struct coro
207{
159 /* the c coroutine allocated to this perl coroutine, if any */ 208 /* the C coroutine allocated to this perl coroutine, if any */
160 coro_cctx *cctx; 209 coro_cctx *cctx;
161 210
211 /* ready queue */
212 struct coro *next_ready;
213
214 /* state data */
215 struct CoroSLF slf_frame; /* saved slf frame */
216 AV *mainstack;
217 perl_slots *slot; /* basically the saved sp */
218
219 CV *startcv; /* the CV to execute */
162 /* data associated with this coroutine (initial args) */ 220 AV *args; /* data associated with this coroutine (initial args) */
163 AV *args;
164 int refcnt;
165 int save; /* CORO_SAVE flags */
166 int flags; /* CF_ flags */ 221 int flags; /* CF_ flags */
222 HV *hv; /* the perl hash associated with this coro, if any */
167 223
168 /* optionally saved, might be zero */ 224 /* statistics */
169 AV *defav; /* @_ */ 225 int usecount; /* number of transfers to this coro */
170 SV *defsv; /* $_ */
171 SV *errsv; /* $@ */
172 SV *irssv; /* $/ */
173 SV *irssv_sv; /* real $/ cache */
174
175#define VAR(name,type) type name;
176# include "state.h"
177#undef VAR
178 226
179 /* coro process data */ 227 /* coro process data */
180 int prio; 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;
181}; 251};
182 252
183typedef struct coro *Coro__State; 253typedef struct coro *Coro__State;
184typedef struct coro *Coro__State_or_hashref; 254typedef struct coro *Coro__State_or_hashref;
185 255
256/* the following variables are effectively part of the perl context */
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);
304static SV *coro_select_select;
305
306/* horrible hack, but if it works... */
186static AV * 307static OP *
308coro_pp_sselect (pTHX)
309{
310 dSP;
311 PUSHMARK (SP - 4); /* fake argument list */
312 XPUSHs (coro_select_select);
313 PUTBACK;
314
315 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
316 PL_op->op_flags |= OPf_STACKED;
317 PL_op->op_private = 0;
318 return PL_ppaddr [OP_ENTERSUB](aTHX);
319}
320
321/** time stuff **************************************************************/
322
323#ifdef HAS_GETTIMEOFDAY
324
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{
356 SV **svp;
357
358 require_pv ("Time/HiRes.pm");
359
360 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
361
362 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
363 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
364
365 nvtime = INT2PTR (double (*)(), SvIV (*svp));
366
367 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
368 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
369}
370
371#endif
372
373/** lowlevel stuff **********************************************************/
374
375static SV * 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 *
187coro_clone_padlist (CV *cv) 511coro_derive_padlist (pTHX_ CV *cv)
188{ 512{
189 AV *padlist = CvPADLIST (cv); 513 PADLIST *padlist = CvPADLIST (cv);
190 AV *newpadlist, *newpad; 514 PADLIST *newpadlist;
515 PAD *newpad;
516 PADOFFSET const off = PadlistMAX (padlist) + 1;
191 517
192 newpadlist = newAV (); 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. */
193 AvREAL_off (newpadlist); 521 AvREAL_off (newpadlist);
522#endif
194#if PERL_VERSION_ATLEAST (5,9,0) 523#if PERL_VERSION_ATLEAST (5,10,0)
195 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 524 Perl_pad_push (aTHX_ padlist, off);
196#else 525#else
197 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 526 Perl_pad_push (aTHX_ padlist, off, 1);
198#endif 527#endif
199 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 528 newpad = PadlistARRAY (padlist)[off];
200 --AvFILLp (padlist); 529 PadlistMAX (padlist) = off - 1;
201 530
202 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 531 /* Already extended to 2 elements by newPADLIST. */
203 av_store (newpadlist, 1, (SV *)newpad); 532 PadlistMAX (newpadlist) = 1;
533 PadlistNAMES (newpadlist) = (PADNAMELIST *)SvREFCNT_inc_NN (PadlistNAMES (padlist));
534 PadlistARRAY (newpadlist)[1] = newpad;
204 535
205 return newpadlist; 536 return newpadlist;
206} 537}
207 538
208static void 539ecb_inline void
209free_padlist (AV *padlist) 540free_padlist (pTHX_ PADLIST *padlist)
210{ 541{
211 /* may be during global destruction */ 542 /* may be during global destruction */
212 if (SvREFCNT (padlist)) 543 if (!IN_DESTRUCT)
213 { 544 {
214 I32 i = AvFILLp (padlist); 545 I32 i = PadlistMAX (padlist);
215 while (i >= 0) 546
547 while (i > 0) /* special-case index 0 */
216 { 548 {
217 SV **svp = av_fetch (padlist, i--, FALSE); 549 /* we try to be extra-careful here */
218 if (svp) 550 PAD *pad = PadlistARRAY (padlist)[i--];
219 { 551 I32 j = PadMAX (pad);
220 SV *sv;
221 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
222 SvREFCNT_dec (sv);
223 552
553 while (j >= 0)
554 SvREFCNT_dec (PadARRAY (pad)[j--]);
555
556 PadMAX (pad) = -1;
224 SvREFCNT_dec (*svp); 557 SvREFCNT_dec (pad);
225 }
226 } 558 }
227 559
560 SvREFCNT_dec (PadlistNAMES (padlist));
561
562#ifdef NEWPADAPI
563 Safefree (PadlistARRAY (padlist));
564 Safefree (padlist);
565#else
566 AvFILLp (padlist) = -1;
567 AvREAL_off (padlist);
228 SvREFCNT_dec ((SV*)padlist); 568 SvREFCNT_dec ((SV*)padlist);
569#endif
229 } 570 }
230} 571}
231 572
232static int 573static int
233coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 574coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
234{ 575{
235 AV *padlist; 576 PADLIST *padlist;
236 AV *av = (AV *)mg->mg_obj; 577 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
578 size_t len = *(size_t *)mg->mg_ptr;
237 579
238 /* casting is fun. */ 580 /* perl manages to free our internal AV and _then_ call us */
239 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 581 if (IN_DESTRUCT)
582 return 0;
583
584 while (len--)
240 free_padlist (padlist); 585 free_padlist (aTHX_ padlists[len]);
241
242 SvREFCNT_dec (av);
243 586
244 return 0; 587 return 0;
245} 588}
246 589
247#define PERL_MAGIC_coro PERL_MAGIC_ext 590static MGVTBL coro_cv_vtbl = {
248 591 0, 0, 0, 0,
249static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 592 coro_cv_free
250 593};
251#define CORO_MAGIC(cv) \
252 SvMAGIC (cv) \
253 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
254 ? SvMAGIC (cv) \
255 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
256 : 0
257 594
258/* the next two functions merely cache the padlists */ 595/* the next two functions merely cache the padlists */
259static void 596ecb_inline void
260get_padlist (CV *cv) 597get_padlist (pTHX_ CV *cv)
261{ 598{
262 MAGIC *mg = CORO_MAGIC (cv); 599 MAGIC *mg = CORO_MAGIC_cv (cv);
263 AV *av; 600 size_t *lenp;
264 601
265 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 602 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
266 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 603 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
267 else 604 else
268 { 605 {
269#if PREFER_PERL_FUNCTIONS 606#if CORO_PREFER_PERL_FUNCTIONS
270 /* this is probably cleaner, but also slower? */ 607 /* this is probably cleaner? but also slower! */
608 /* in practise, it seems to be less stable */
271 CV *cp = Perl_cv_clone (cv); 609 CV *cp = Perl_cv_clone (aTHX_ cv);
272 CvPADLIST (cv) = CvPADLIST (cp); 610 CvPADLIST (cv) = CvPADLIST (cp);
273 CvPADLIST (cp) = 0; 611 CvPADLIST (cp) = 0;
274 SvREFCNT_dec (cp); 612 SvREFCNT_dec (cp);
275#else 613#else
276 CvPADLIST (cv) = coro_clone_padlist (cv); 614 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
277#endif 615#endif
278 } 616 }
279} 617}
280 618
281static void 619ecb_inline void
282put_padlist (CV *cv) 620put_padlist (pTHX_ CV *cv)
283{ 621{
284 MAGIC *mg = CORO_MAGIC (cv); 622 MAGIC *mg = CORO_MAGIC_cv (cv);
285 AV *av;
286 623
287 if (!mg) 624 if (ecb_expect_false (!mg))
288 {
289 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
290 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
291 mg->mg_virtual = &vtbl_coro;
292 mg->mg_obj = (SV *)newAV ();
293 } 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);
294 634
295 av = (AV *)mg->mg_obj; 635 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
296
297 if (AvFILLp (av) >= AvMAX (av))
298 av_extend (av, AvMAX (av) + 1);
299
300 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
301} 636}
302 637
303#define SB do { 638/** load & save, init *******************************************************/
304#define SE } while (0)
305 639
306#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE 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;
307 645
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);
674 }
675#endif
676}
677
678/* swap sv heads, at least logically */
308static void 679static void
680swap_svs (pTHX_ Coro__State c)
681{
682 int i;
683
684 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
685 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
686}
687
688#define SWAP_SVS(coro) \
689 if (ecb_expect_false ((coro)->swap_sv)) \
690 swap_svs (aTHX_ (coro))
691
692static void
693on_enterleave_call (pTHX_ SV *cb);
694
695static void
309load_perl (Coro__State c) 696load_perl (pTHX_ Coro__State c)
310{ 697{
311#define VAR(name,type) PL_ ## name = c->name; 698 perl_slots *slot = c->slot;
699 c->slot = 0;
700
701 PL_mainstack = c->mainstack;
702
703#if CORO_JIT
704 load_perl_slots (slot);
705#else
706 #define VARx(name,expr,type) expr = slot->name;
312# include "state.h" 707 #include "state.h"
313#undef VAR 708#endif
314
315 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
316 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
317 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
318 if (c->irssv)
319 {
320 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
321 SvREFCNT_dec (c->irssv);
322 else
323 {
324 REPLACE_SV (PL_rs, c->irssv);
325 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
326 sv_setsv (c->irssv_sv, PL_rs);
327 }
328 }
329 709
330 { 710 {
331 dSP; 711 dSP;
712
332 CV *cv; 713 CV *cv;
333 714
334 /* now do the ugly restore mess */ 715 /* now do the ugly restore mess */
335 while ((cv = (CV *)POPs)) 716 while (ecb_expect_true (cv = (CV *)POPs))
336 { 717 {
337 put_padlist (cv); /* mark this padlist as available */ 718 put_padlist (aTHX_ cv); /* mark this padlist as available */
338 CvDEPTH (cv) = PTR2IV (POPs); 719 CvDEPTH (cv) = PTR2IV (POPs);
339 CvPADLIST (cv) = (AV *)POPs; 720 CvPADLIST (cv) = (PADLIST *)POPs;
340 } 721 }
341 722
342 PUTBACK; 723 PUTBACK;
343 } 724 }
344}
345 725
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
346static void 748static void
347save_perl (Coro__State c) 749save_perl (pTHX_ Coro__State c)
348{ 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
349 { 772 {
350 dSP; 773 dSP;
351 I32 cxix = cxstack_ix; 774 I32 cxix = cxstack_ix;
352 PERL_CONTEXT *ccstk = cxstack; 775 PERL_CONTEXT *ccstk = cxstack;
353 PERL_SI *top_si = PL_curstackinfo; 776 PERL_SI *top_si = PL_curstackinfo;
… …
355 /* 778 /*
356 * 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
357 * (and reinitialize) all cv's in the whole callchain :( 780 * (and reinitialize) all cv's in the whole callchain :(
358 */ 781 */
359 782
360 EXTEND (SP, 3 + 1);
361 PUSHs (Nullsv); 783 XPUSHs (Nullsv);
362 /* this loop was inspired by pp_caller */ 784 /* this loop was inspired by pp_caller */
363 for (;;) 785 for (;;)
364 { 786 {
365 while (cxix >= 0) 787 while (ecb_expect_true (cxix >= 0))
366 { 788 {
367 PERL_CONTEXT *cx = &ccstk[cxix--]; 789 PERL_CONTEXT *cx = &ccstk[cxix--];
368 790
369 if (CxTYPE (cx) == CXt_SUB) 791 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
370 { 792 {
371 CV *cv = cx->blk_sub.cv; 793 CV *cv = cx->blk_sub.cv;
372 794
373 if (CvDEPTH (cv)) 795 if (ecb_expect_true (CvDEPTH (cv)))
374 { 796 {
375 EXTEND (SP, 3); 797 EXTEND (SP, 3);
376 PUSHs ((SV *)CvPADLIST (cv)); 798 PUSHs ((SV *)CvPADLIST (cv));
377 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 799 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
378 PUSHs ((SV *)cv); 800 PUSHs ((SV *)cv);
379 801
380 CvDEPTH (cv) = 0; 802 CvDEPTH (cv) = 0;
381 get_padlist (cv); 803 get_padlist (aTHX_ cv);
382 } 804 }
383 } 805 }
384 } 806 }
385 807
386 if (top_si->si_type == PERLSI_MAIN) 808 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
387 break; 809 break;
388 810
389 top_si = top_si->si_prev; 811 top_si = top_si->si_prev;
390 ccstk = top_si->si_cxstack; 812 ccstk = top_si->si_cxstack;
391 cxix = top_si->si_cxix; 813 cxix = top_si->si_cxix;
392 } 814 }
393 815
394 PUTBACK; 816 PUTBACK;
395 } 817 }
396 818
397 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 819 /* allocate some space on the context stack for our purposes */
398 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 820 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
399 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 821 {
400 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; 822 unsigned int i;
401 823
402#define VAR(name,type)c->name = PL_ ## name; 824 for (i = 0; i < SLOT_COUNT; ++i)
825 CXINC;
826
827 cxstack_ix -= SLOT_COUNT; /* undo allocation */
828 }
829
830 c->mainstack = PL_mainstack;
831
832 {
833 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
834
835#if CORO_JIT
836 save_perl_slots (slot);
837#else
838 #define VARx(name,expr,type) slot->name = expr;
403# include "state.h" 839 #include "state.h"
404#undef VAR 840#endif
841 }
405} 842}
406 843
407/* 844/*
408 * allocate various perl stacks. This is an exact copy 845 * allocate various perl stacks. This is almost an exact copy
409 * of perl.c:init_stacks, except that it uses less memory 846 * of perl.c:init_stacks, except that it uses less memory
410 * on the (sometimes correct) assumption that coroutines do 847 * on the (sometimes correct) assumption that coroutines do
411 * not usually need a lot of stackspace. 848 * not usually need a lot of stackspace.
412 */ 849 */
413#if PREFER_PERL_FUNCTIONS 850#if CORO_PREFER_PERL_FUNCTIONS
414# define coro_init_stacks init_stacks 851# define coro_init_stacks(thx) init_stacks ()
415#else 852#else
416static void 853static void
417coro_init_stacks () 854coro_init_stacks (pTHX)
418{ 855{
419 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 856 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
420 PL_curstackinfo->si_type = PERLSI_MAIN; 857 PL_curstackinfo->si_type = PERLSI_MAIN;
421 PL_curstack = PL_curstackinfo->si_stack; 858 PL_curstack = PL_curstackinfo->si_stack;
422 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 859 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
423 860
424 PL_stack_base = AvARRAY(PL_curstack); 861 PL_stack_base = AvARRAY(PL_curstack);
425 PL_stack_sp = PL_stack_base; 862 PL_stack_sp = PL_stack_base;
426 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 863 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
427 864
428 New(50,PL_tmps_stack,128,SV*); 865 New(50,PL_tmps_stack,32,SV*);
429 PL_tmps_floor = -1; 866 PL_tmps_floor = -1;
430 PL_tmps_ix = -1; 867 PL_tmps_ix = -1;
431 PL_tmps_max = 128; 868 PL_tmps_max = 32;
432 869
433 New(54,PL_markstack,32,I32); 870 New(54,PL_markstack,16,I32);
434 PL_markstack_ptr = PL_markstack; 871 PL_markstack_ptr = PL_markstack;
435 PL_markstack_max = PL_markstack + 32; 872 PL_markstack_max = PL_markstack + 16;
436 873
437#ifdef SET_MARK_OFFSET 874#ifdef SET_MARK_OFFSET
438 SET_MARK_OFFSET; 875 SET_MARK_OFFSET;
439#endif 876#endif
440 877
441 New(54,PL_scopestack,32,I32); 878 New(54,PL_scopestack,8,I32);
442 PL_scopestack_ix = 0; 879 PL_scopestack_ix = 0;
443 PL_scopestack_max = 32; 880 PL_scopestack_max = 8;
881#if HAS_SCOPESTACK_NAME
882 New(54,PL_scopestack_name,8,const char*);
883#endif
444 884
445 New(54,PL_savestack,64,ANY); 885 New(54,PL_savestack,24,ANY);
446 PL_savestack_ix = 0; 886 PL_savestack_ix = 0;
447 PL_savestack_max = 64; 887 PL_savestack_max = 24;
448 888
449#if !PERL_VERSION_ATLEAST (5,9,0) 889#if !PERL_VERSION_ATLEAST (5,10,0)
450 New(54,PL_retstack,16,OP*); 890 New(54,PL_retstack,4,OP*);
451 PL_retstack_ix = 0; 891 PL_retstack_ix = 0;
452 PL_retstack_max = 16; 892 PL_retstack_max = 4;
453#endif 893#endif
454} 894}
455#endif 895#endif
456 896
457/* 897/*
458 * destroy the stacks, the callchain etc... 898 * destroy the stacks, the callchain etc...
459 */ 899 */
460static void 900static void
461coro_destroy_stacks () 901coro_destruct_stacks (pTHX)
462{ 902{
463 if (!IN_DESTRUCT)
464 {
465 /* restore all saved variables and stuff */
466 LEAVE_SCOPE (0);
467 assert (PL_tmps_floor == -1);
468
469 /* free all temporaries */
470 FREETMPS;
471 assert (PL_tmps_ix == -1);
472
473 POPSTACK_TO (PL_mainstack);
474 }
475
476 while (PL_curstackinfo->si_next) 903 while (PL_curstackinfo->si_next)
477 PL_curstackinfo = PL_curstackinfo->si_next; 904 PL_curstackinfo = PL_curstackinfo->si_next;
478 905
479 while (PL_curstackinfo) 906 while (PL_curstackinfo)
480 { 907 {
… …
489 } 916 }
490 917
491 Safefree (PL_tmps_stack); 918 Safefree (PL_tmps_stack);
492 Safefree (PL_markstack); 919 Safefree (PL_markstack);
493 Safefree (PL_scopestack); 920 Safefree (PL_scopestack);
921#if HAS_SCOPESTACK_NAME
922 Safefree (PL_scopestack_name);
923#endif
494 Safefree (PL_savestack); 924 Safefree (PL_savestack);
495#if !PERL_VERSION_ATLEAST (5,9,0) 925#if !PERL_VERSION_ATLEAST (5,10,0)
496 Safefree (PL_retstack); 926 Safefree (PL_retstack);
497#endif 927#endif
498} 928}
499 929
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)
947 {
948 #define SYM(sym) PL_ ## sym
949 CORO_RSS;
950 #undef SYM
951 }
952 else
953 {
954 #define SYM(sym) coro->slot->sym
955 CORO_RSS;
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));
1002 else
1003 ssv = *svp;
1004
1005 sv_setsv (sv, ssv);
1006 return 0;
1007 }
1008 }
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 == '_')
1019 {
1020 SV **svp = 0;
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
500static void 1068static int
501setup_coro (struct coro *coro) 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)
502{ 1084{
503 /* 1085 /*
504 * emulate part of the perl startup here. 1086 * emulate part of the perl startup here.
505 */ 1087 */
506
507 coro_init_stacks (); 1088 coro_init_stacks (aTHX);
508 1089
1090 PL_runops = RUNOPS_DEFAULT;
509 PL_curcop = &PL_compiling; 1091 PL_curcop = &PL_compiling;
510 PL_in_eval = EVAL_NULL; 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;
511 PL_curpm = 0; 1097 PL_curpm = 0;
1098 PL_curpad = 0;
512 PL_localizing = 0; 1099 PL_localizing = 0;
513 PL_dirty = 0;
514 PL_restartop = 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);
515 1117
516 { 1118 {
517 dSP; 1119 dSP;
518 LOGOP myop; 1120 UNOP myop;
519 1121
520 SvREFCNT_dec (GvAV (PL_defgv));
521 GvAV (PL_defgv) = coro->args; coro->args = 0;
522
523 Zero (&myop, 1, LOGOP); 1122 Zero (&myop, 1, UNOP);
524 myop.op_next = Nullop; 1123 myop.op_next = Nullop;
1124 myop.op_type = OP_ENTERSUB;
525 myop.op_flags = OPf_WANT_VOID; 1125 myop.op_flags = OPf_WANT_VOID;
526 1126
527 PUSHMARK (SP); 1127 PUSHMARK (SP);
528 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE)); 1128 PUSHs ((SV *)coro->startcv);
529 PUTBACK; 1129 PUTBACK;
530 PL_op = (OP *)&myop; 1130 PL_op = (OP *)&myop;
531 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1131 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
532 SPAGAIN;
533 } 1132 }
534 1133
535 ENTER; /* necessary e.g. for dounwind */ 1134 /* this newly created coroutine might be run on an existing cctx which most
536} 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;
537 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
538static void 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
539free_coro_mortal () 1238free_coro_mortal (pTHX)
540{ 1239{
541 if (coro_mortal) 1240 if (ecb_expect_true (coro_mortal))
542 { 1241 {
543 SvREFCNT_dec (coro_mortal); 1242 SvREFCNT_dec ((SV *)coro_mortal);
544 coro_mortal = 0; 1243 coro_mortal = 0;
545 } 1244 }
546} 1245}
547 1246
548/* inject a fake call to Coro::State::_cctx_init into the execution */
549static void NOINLINE
550prepare_cctx (coro_cctx *cctx)
551{
552 dSP;
553 LOGOP myop;
554
555 Zero (&myop, 1, LOGOP);
556 myop.op_next = PL_op;
557 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
558
559 PUSHMARK (SP);
560 EXTEND (SP, 2);
561 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
562 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
563 PUTBACK;
564 PL_op = (OP *)&myop;
565 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
566 SPAGAIN;
567}
568
569static void 1247static int
570coro_run (void *arg) 1248runops_trace (pTHX)
571{ 1249{
572 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1250 COP *oldcop = 0;
573 UNLOCK; 1251 int oldcxix = -2;
574 1252
575 /* 1253 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
576 * this is a _very_ stripped down perl interpreter ;) 1254 {
577 */ 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{
578 PL_top_env = &PL_start_env; 1388 PL_top_env = &PL_start_env;
579 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
580 /* inject call to cctx_init */ 1442 /* inject a fake subroutine call to cctx_init */
581 prepare_cctx ((coro_cctx *)arg); 1443 cctx_prepare (aTHX);
582 1444
1445 /* cctx_run is the alternative tail of transfer() */
1446 transfer_tail (aTHX);
1447
583 /* somebody will hit me for both perl_run and PL_restartop */ 1448 /* somebody or something will hit me for both perl_run and PL_restartop */
584 PL_restartop = PL_op; 1449 PL_restartop = PL_op;
585 perl_run (PL_curinterp); 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 */
586 1456
587 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1457 /*
588 abort (); 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 }
589} 1465}
590 1466
591static coro_cctx * 1467static coro_cctx *
592cctx_new () 1468cctx_new (void)
593{ 1469{
594 coro_cctx *cctx; 1470 coro_cctx *cctx;
595 1471
596 ++cctx_count; 1472 ++cctx_count;
597
598 Newz (0, cctx, 1, coro_cctx); 1473 New (0, cctx, 1, coro_cctx);
599 1474
600#if HAVE_MMAP 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 */
601 1478
602 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1479 return cctx;
603 /* mmap supposedly does allocate-on-write for us */ 1480}
604 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
605 1481
606 if (cctx->sptr == (void *)-1) 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))
607 { 1501 {
608 perror ("FATAL: unable to mmap stack for coroutine"); 1502 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
609 _exit (EXIT_FAILURE); 1503 _exit (EXIT_FAILURE);
610 } 1504 }
611 1505
612# if STACKGUARD
613 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
614# endif
615
616#else
617
618 cctx->ssize = STACKSIZE * (long)sizeof (long);
619 New (0, cctx->sptr, STACKSIZE, long);
620
621 if (!cctx->sptr)
622 {
623 perror ("FATAL: unable to malloc stack for coroutine");
624 _exit (EXIT_FAILURE);
625 }
626
627#endif
628
629#if USE_VALGRIND
630 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
631 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
632 cctx->ssize + (char *)cctx->sptr
633 );
634#endif
635
636 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize); 1506 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
637 1507
638 return cctx; 1508 return cctx;
639} 1509}
640 1510
641static void 1511static void
642cctx_destroy (coro_cctx *cctx) 1512cctx_destroy (coro_cctx *cctx)
643{ 1513{
644 if (!cctx) 1514 if (!cctx)
645 return; 1515 return;
646 1516
1517 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1518
647 --cctx_count; 1519 --cctx_count;
1520 coro_destroy (&cctx->cctx);
648 1521
649#if USE_VALGRIND 1522 coro_stack_free (&cctx->stack);
650 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
651#endif
652
653#if HAVE_MMAP
654 munmap (cctx->sptr, cctx->ssize);
655#else
656 Safefree (cctx->sptr);
657#endif
658 1523
659 Safefree (cctx); 1524 Safefree (cctx);
660} 1525}
661 1526
1527/* wether this cctx should be destructed */
1528#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1529
662static coro_cctx * 1530static coro_cctx *
663cctx_get () 1531cctx_get (pTHX)
664{ 1532{
665 coro_cctx *cctx; 1533 while (ecb_expect_true (cctx_first))
666
667 if (cctx_first)
668 { 1534 {
669 cctx = cctx_first; 1535 coro_cctx *cctx = cctx_first;
670 cctx_first = cctx->next; 1536 cctx_first = cctx->next;
671 --cctx_idle; 1537 --cctx_idle;
672 } 1538
673 else 1539 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
674 { 1540 return cctx;
675 cctx = cctx_new (); 1541
676 PL_op = PL_op->op_next; 1542 cctx_destroy (cctx);
677 } 1543 }
678 1544
679 return cctx; 1545 return cctx_new_run ();
680} 1546}
681 1547
682static void 1548static void
683cctx_put (coro_cctx *cctx) 1549cctx_put (coro_cctx *cctx)
684{ 1550{
1551 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1552
685 /* free another cctx if overlimit */ 1553 /* free another cctx if overlimit */
686 if (cctx_idle >= MAX_IDLE_CCTX) 1554 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
687 { 1555 {
688 coro_cctx *first = cctx_first; 1556 coro_cctx *first = cctx_first;
689 cctx_first = first->next; 1557 cctx_first = first->next;
690 --cctx_idle; 1558 --cctx_idle;
691 1559
692 assert (!first->inuse);
693 cctx_destroy (first); 1560 cctx_destroy (first);
694 } 1561 }
695 1562
696 ++cctx_idle; 1563 ++cctx_idle;
697 cctx->next = cctx_first; 1564 cctx->next = cctx_first;
698 cctx_first = cctx; 1565 cctx_first = cctx;
699} 1566}
700 1567
701/* never call directly, always through the coro_state_transfer global variable */ 1568/** coroutine switching *****************************************************/
702static void NOINLINE 1569
1570static void
703transfer (struct coro *prev, struct coro *next) 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)
704{ 1593{
705 dSTACKLEVEL; 1594 dSTACKLEVEL;
706 1595
707 /* sometimes transfer is only called to set idle_sp */ 1596 /* sometimes transfer is only called to set idle_sp */
708 if (!next) 1597 if (ecb_expect_false (!prev))
709 { 1598 {
710 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1599 cctx_current->idle_sp = STACKLEVEL;
711 assert (((coro_cctx *)prev)->top_env = PL_top_env); /* just for the side effetc when assert is enabled */ 1600 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
712 }
713 else if (prev != next)
714 { 1601 }
1602 else if (ecb_expect_true (prev != next))
1603 {
715 coro_cctx *prev__cctx; 1604 coro_cctx *cctx_prev;
716 1605
717 if (prev->flags & CF_NEW) 1606 if (ecb_expect_false (prev->flags & CF_NEW))
718 { 1607 {
719 /* create a new empty context */ 1608 /* create a new empty/source context */
720 Newz (0, prev->cctx, 1, coro_cctx);
721 prev->cctx->inuse = 1;
722 prev->flags &= ~CF_NEW; 1609 prev->flags &= ~CF_NEW;
723 prev->flags |= CF_RUNNING; 1610 prev->flags |= CF_RUNNING;
724 } 1611 }
725 1612
726 /*TODO: must not croak here */
727 if (!prev->flags & CF_RUNNING)
728 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
729
730 if (next->flags & CF_RUNNING)
731 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
732
733 prev->flags &= ~CF_RUNNING; 1613 prev->flags &= ~CF_RUNNING;
734 next->flags |= CF_RUNNING; 1614 next->flags |= CF_RUNNING;
735 1615
736 LOCK; 1616 /* first get rid of the old state */
1617 save_perl (aTHX_ prev);
737 1618
738 if (next->flags & CF_NEW) 1619 if (ecb_expect_false (next->flags & CF_NEW))
739 { 1620 {
740 /* need to start coroutine */ 1621 /* need to start coroutine */
741 next->flags &= ~CF_NEW; 1622 next->flags &= ~CF_NEW;
742 /* first get rid of the old state */
743 save_perl (prev);
744 /* setup coroutine call */ 1623 /* setup coroutine call */
745 setup_coro (next); 1624 init_perl (aTHX_ next);
746 /* need a new stack */
747 assert (!next->cctx);
748 } 1625 }
749 else 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 ))
750 { 1635 {
751 /* coroutine already started */ 1636 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
752 save_perl (prev); 1637 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
753 load_perl (next); 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);
754 } 1646 }
1647 else
1648 prev->cctx = cctx_current;
755 1649
756 prev__cctx = prev->cctx; 1650 ++next->usecount;
757 1651
758 /* possibly "free" the cctx */ 1652 cctx_prev = cctx_current;
759 if (prev__cctx->idle_sp == STACKLEVEL) 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))
760 { 1658 {
761 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1659 cctx_prev->top_env = PL_top_env;
762 assert (PL_top_env == prev__cctx->top_env); 1660 PL_top_env = cctx_current->top_env;
763 1661 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
764 prev->cctx = 0;
765
766 cctx_put (prev__cctx);
767 prev__cctx->inuse = 0;
768 } 1662 }
769 1663
770 if (!next->cctx) 1664 transfer_tail (aTHX);
771 {
772 next->cctx = cctx_get ();
773 assert (!next->cctx->inuse);
774 next->cctx->inuse = 1;
775 }
776
777 if (prev__cctx != next->cctx)
778 {
779 prev__cctx->top_env = PL_top_env;
780 PL_top_env = next->cctx->top_env;
781 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
782 }
783
784 free_coro_mortal ();
785
786 UNLOCK;
787 } 1665 }
788} 1666}
789 1667
790struct transfer_args 1668#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
791{
792 struct coro *prev, *next;
793};
794
795#define TRANSFER(ta) transfer ((ta).prev, (ta).next) 1669#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
796 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 */
797static void 1675static void
1676coro_call_on_destroy (pTHX_ struct coro *coro);
1677
1678static void
798coro_state_destroy (struct coro *coro) 1679coro_state_destroy (pTHX_ struct coro *coro)
799{ 1680{
800 if (coro->refcnt--) 1681 if (coro->flags & CF_ZOMBIE)
801 return; 1682 return;
802 1683
803 if (coro->mainstack && coro->mainstack != main_mainstack) 1684 slf_destroy (aTHX_ coro);
804 {
805 struct coro temp;
806 Zero (&temp, 1, struct coro);
807 temp.save = CORO_SAVE_ALL;
808 1685
1686 coro->flags |= CF_ZOMBIE;
1687
809 if (coro->flags & CF_RUNNING) 1688 if (coro->flags & CF_READY)
810 croak ("FATAL: tried to destroy currently running coroutine");
811
812 save_perl (&temp);
813 load_perl (coro);
814
815 coro_destroy_stacks ();
816
817 load_perl (&temp); /* this will get rid of defsv etc.. */
818
819 coro->mainstack = 0;
820 } 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);
821 1706
822 cctx_destroy (coro->cctx); 1707 cctx_destroy (coro->cctx);
1708 SvREFCNT_dec (coro->startcv);
823 SvREFCNT_dec (coro->args); 1709 SvREFCNT_dec (coro->args);
824 Safefree (coro); 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 */
825} 1716}
826 1717
827static int 1718static int
828coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1719coro_state_free (pTHX_ SV *sv, MAGIC *mg)
829{ 1720{
830 struct coro *coro = (struct coro *)mg->mg_ptr; 1721 struct coro *coro = (struct coro *)mg->mg_ptr;
831 mg->mg_ptr = 0; 1722 mg->mg_ptr = 0;
832 1723
833 coro_state_destroy (coro); 1724 coro_state_destroy (aTHX_ coro);
1725 SvREFCNT_dec (coro->on_destroy);
1726 SvREFCNT_dec (coro->status);
1727
1728 Safefree (coro);
834 1729
835 return 0; 1730 return 0;
836} 1731}
837 1732
838static int 1733static int ecb_cold
839coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1734coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
840{ 1735{
841 struct coro *coro = (struct coro *)mg->mg_ptr; 1736 /* called when perl clones the current process the slow way (windows process emulation) */
842 1737 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
843 ++coro->refcnt; 1738 mg->mg_ptr = 0;
1739 mg->mg_virtual = 0;
844 1740
845 return 0; 1741 return 0;
846} 1742}
847 1743
848static MGVTBL coro_state_vtbl = { 1744static MGVTBL coro_state_vtbl = {
849 0, 0, 0, 0, 1745 0, 0, 0, 0,
850 coro_state_clear, 1746 coro_state_free,
851 0, 1747 0,
852#ifdef MGf_DUP 1748#ifdef MGf_DUP
853 coro_state_dup, 1749 coro_state_dup,
854#else 1750#else
855# define MGf_DUP 0 1751# define MGf_DUP 0
856#endif 1752#endif
857}; 1753};
858 1754
859static struct coro *
860SvSTATE (SV *coro)
861{
862 HV *stash;
863 MAGIC *mg;
864
865 if (SvROK (coro))
866 coro = SvRV (coro);
867
868 stash = SvSTASH (coro);
869 if (stash != coro_stash && stash != coro_state_stash)
870 {
871 /* very slow, but rare, check */
872 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
873 croak ("Coro::State object required");
874 }
875
876 mg = SvMAGIC (coro);
877 assert (mg->mg_type == PERL_MAGIC_ext);
878 return (struct coro *)mg->mg_ptr;
879}
880
881static void 1755static void
882prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1756prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
883{ 1757{
884 ta->prev = SvSTATE (prev_sv); 1758 ta->prev = SvSTATE (prev_sv);
885 ta->next = SvSTATE (next_sv); 1759 ta->next = SvSTATE (next_sv);
1760 TRANSFER_CHECK (*ta);
886} 1761}
887 1762
888static void 1763static void
889api_transfer (SV *prev_sv, SV *next_sv) 1764api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
890{ 1765{
891 struct transfer_args ta; 1766 struct coro_transfer_args ta;
892 1767
893 prepare_transfer (&ta, prev_sv, next_sv); 1768 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
894 TRANSFER (ta); 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;
1810 dSP;
1811
1812 ENTER;
1813 SAVETMPS;
1814
1815 PUSHMARK (SP);
1816 PUTBACK;
1817 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1818
1819 FREETMPS;
1820 LEAVE;
895} 1821}
896 1822
897static int 1823static int
898api_save (SV *coro_sv, int new_save) 1824api_ready (pTHX_ SV *coro_sv)
899{ 1825{
900 struct coro *coro = SvSTATE (coro_sv); 1826 struct coro *coro = SvSTATE (coro_sv);
901 int old_save = coro->save;
902
903 if (new_save >= 0)
904 coro->save = new_save;
905
906 return old_save;
907}
908
909/** Coro ********************************************************************/
910
911#define PRIO_MAX 3
912#define PRIO_HIGH 1
913#define PRIO_NORMAL 0
914#define PRIO_LOW -1
915#define PRIO_IDLE -3
916#define PRIO_MIN -4
917
918/* for Coro.pm */
919static SV *coro_current;
920static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
921static int coro_nready;
922
923static void
924coro_enq (SV *coro_sv)
925{
926 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
927 coro_nready++;
928}
929
930static SV *
931coro_deq (int min_prio)
932{
933 int prio = PRIO_MAX - PRIO_MIN;
934
935 min_prio -= PRIO_MIN;
936 if (min_prio < 0)
937 min_prio = 0;
938
939 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
940 if (AvFILLp (coro_ready [prio]) >= 0)
941 {
942 coro_nready--;
943 return av_shift (coro_ready [prio]);
944 }
945
946 return 0;
947}
948
949static int
950api_ready (SV *coro_sv)
951{
952 struct coro *coro;
953
954 if (SvROK (coro_sv))
955 coro_sv = SvRV (coro_sv);
956
957 coro = SvSTATE (coro_sv);
958 1827
959 if (coro->flags & CF_READY) 1828 if (coro->flags & CF_READY)
960 return 0; 1829 return 0;
961 1830
962 coro->flags |= CF_READY; 1831 coro->flags |= CF_READY;
963 1832
964 LOCK; 1833 coro_enq (aTHX_ coro);
965 coro_enq (SvREFCNT_inc (coro_sv)); 1834
966 UNLOCK; 1835 if (!coro_nready++)
1836 if (coroapi.readyhook)
1837 coroapi.readyhook ();
967 1838
968 return 1; 1839 return 1;
969} 1840}
970 1841
971static int 1842static int
972api_is_ready (SV *coro_sv) 1843api_is_ready (pTHX_ SV *coro_sv)
973{ 1844{
974 return !!SvSTATE (coro_sv)->flags & CF_READY; 1845 return !!(SvSTATE (coro_sv)->flags & CF_READY);
975} 1846}
976 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
977static void 1865static void
978prepare_schedule (struct transfer_args *ta) 1866prepare_schedule (pTHX_ struct coro_transfer_args *ta)
979{ 1867{
980 SV *prev, *next;
981
982 for (;;) 1868 for (;;)
983 { 1869 {
984 LOCK; 1870 struct coro *next = coro_deq (aTHX);
985 next = coro_deq (PRIO_MIN);
986 UNLOCK;
987 1871
988 if (next) 1872 if (ecb_expect_true (next))
1873 {
1874 /* cannot transfer to destroyed coros, skip and look for next */
1875 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1876 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1877 else
1878 {
1879 next->flags &= ~CF_READY;
1880 --coro_nready;
1881
1882 prepare_schedule_to (aTHX_ ta, next);
989 break; 1883 break;
1884 }
1885 }
1886 else
1887 {
1888 /* nothing to schedule: call the idle handler */
1889 if (SvROK (sv_idle)
1890 && SvOBJECT (SvRV (sv_idle)))
1891 {
1892 if (SvRV (sv_idle) == SvRV (coro_current))
1893 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1894
1895 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1896 api_ready (aTHX_ SvRV (sv_idle));
1897 --coro_nready;
1898 }
1899 else
1900 {
1901 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1902 dSP;
1903
1904 ENTER;
1905 SAVETMPS;
1906
1907 PUSHMARK (SP);
1908 PUTBACK;
1909 call_sv (sv_idle, G_VOID | G_DISCARD);
1910
1911 FREETMPS;
1912 LEAVE;
1913 }
1914 }
1915 }
1916}
1917
1918ecb_inline void
1919prepare_cede (pTHX_ struct coro_transfer_args *ta)
1920{
1921 api_ready (aTHX_ coro_current);
1922 prepare_schedule (aTHX_ ta);
1923}
1924
1925ecb_inline void
1926prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1927{
1928 SV *prev = SvRV (coro_current);
1929
1930 if (coro_nready)
1931 {
1932 prepare_schedule (aTHX_ ta);
1933 api_ready (aTHX_ prev);
1934 }
1935 else
1936 prepare_nop (aTHX_ ta);
1937}
1938
1939static void
1940api_schedule (pTHX)
1941{
1942 struct coro_transfer_args ta;
1943
1944 prepare_schedule (aTHX_ &ta);
1945 TRANSFER (ta, 1);
1946}
1947
1948static void
1949api_schedule_to (pTHX_ SV *coro_sv)
1950{
1951 struct coro_transfer_args ta;
1952 struct coro *next = SvSTATE (coro_sv);
1953
1954 SvREFCNT_inc_NN (coro_sv);
1955 prepare_schedule_to (aTHX_ &ta, next);
1956}
1957
1958static int
1959api_cede (pTHX)
1960{
1961 struct coro_transfer_args ta;
1962
1963 prepare_cede (aTHX_ &ta);
1964
1965 if (ecb_expect_true (ta.prev != ta.next))
1966 {
1967 TRANSFER (ta, 1);
1968 return 1;
1969 }
1970 else
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
2027 {
2028 int i;
2029 EXTEND (SP, AvFILLp (av) + 1);
2030
2031 for (i = 0; i <= AvFILLp (av); ++i)
2032 PUSHs (AvARRAY (av)[i]);
2033 }
2034
2035 PUTBACK;
2036 }
2037}
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 coro->on_destroy = 0;
2102 sv_2mortal ((SV *)od);
2103
2104 while (AvFILLp (od) >= 0)
2105 {
2106 SV *cb = sv_2mortal (av_pop (od));
2107
2108 /* coro hv's (and only hv's at the moment) are supported as well */
2109 if (SvSTATEhv_p (aTHX_ cb))
2110 api_ready (aTHX_ cb);
2111 else
2112 {
2113 dSP; /* don't disturb outer sp */
2114 PUSHMARK (SP);
2115
2116 if (coro->status)
2117 {
2118 PUTBACK;
2119 coro_push_av (aTHX_ coro->status, G_ARRAY);
2120 SPAGAIN;
2121 }
2122
2123 PUTBACK;
2124 call_sv (cb, G_VOID | G_DISCARD);
2125 }
2126 }
2127}
2128
2129static void
2130coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2131{
2132 AV *av;
2133
2134 if (coro->status)
2135 {
2136 av = coro->status;
2137 av_clear (av);
2138 }
2139 else
2140 av = coro->status = newAV ();
2141
2142 /* items are actually not so common, so optimise for this case */
2143 if (items)
2144 {
2145 int i;
2146
2147 av_extend (av, items - 1);
2148
2149 for (i = 0; i < items; ++i)
2150 av_push (av, SvREFCNT_inc_NN (arg [i]));
2151 }
2152}
2153
2154static void
2155slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2156{
2157 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2158 api_ready (aTHX_ sv_manager);
2159
2160 frame->prepare = prepare_schedule;
2161 frame->check = slf_check_repeat;
2162
2163 /* as a minor optimisation, we could unwind all stacks here */
2164 /* but that puts extra pressure on pp_slf, and is not worth much */
2165 /*coro_unwind_stacks (aTHX);*/
2166}
2167
2168static void
2169slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2170{
2171 HV *coro_hv = (HV *)SvRV (coro_current);
2172
2173 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2174 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2175}
2176
2177static void
2178slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2179{
2180 HV *coro_hv;
2181 struct coro *coro;
2182
2183 if (items <= 0)
2184 croak ("Coro::cancel called without coro object,");
2185
2186 coro = SvSTATE (arg [0]);
2187 coro_hv = coro->hv;
2188
2189 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2190
2191 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2192 {
2193 /* coro currently busy cancelling something, so just notify it */
2194 coro->slf_frame.data = (void *)coro;
2195
2196 frame->prepare = prepare_nop;
2197 frame->check = slf_check_nop;
2198 }
2199 else if (coro_hv == (HV *)SvRV (coro_current))
2200 {
2201 /* cancelling the current coro is allowed, and equals terminate */
2202 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2203 }
2204 else
2205 {
2206 struct coro *self = SvSTATE_current;
2207
2208 /* otherwise we cancel directly, purely for speed reasons
2209 * unfortunately, this requires some magic trickery, as
2210 * somebody else could cancel us, so we have to fight the cancellation.
2211 * this is ugly, and hopefully fully worth the extra speed.
2212 * besides, I can't get the slow-but-safe version working...
2213 */
2214 slf_frame.data = 0;
2215 self->flags |= CF_NOCANCEL;
2216 coro_state_destroy (aTHX_ coro);
2217 self->flags &= ~CF_NOCANCEL;
2218
2219 if (slf_frame.data)
2220 {
2221 /* while we were busy we have been cancelled, so terminate */
2222 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2223 }
2224 else
2225 {
2226 frame->prepare = prepare_nop;
2227 frame->check = slf_check_nop;
2228 }
2229 }
2230}
2231
2232static int
2233slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2234{
2235 frame->prepare = 0;
2236 coro_unwind_stacks (aTHX);
2237
2238 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2239
2240 return 1;
2241}
2242
2243static int
2244safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2245{
2246 if (coro->cctx)
2247 croak ("coro inside C callback, unable to cancel at this time, caught");
2248
2249 if (coro->flags & CF_NEW)
2250 {
2251 coro_set_status (aTHX_ coro, arg, items);
2252 coro_state_destroy (aTHX_ coro);
2253 }
2254 else
2255 {
2256 if (!coro->slf_frame.prepare)
2257 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2258
2259 slf_destroy (aTHX_ coro);
2260
2261 coro_set_status (aTHX_ coro, arg, items);
2262 coro->slf_frame.prepare = prepare_nop;
2263 coro->slf_frame.check = slf_check_safe_cancel;
2264
2265 api_ready (aTHX_ (SV *)coro->hv);
2266 }
2267
2268 return 1;
2269}
2270
2271/*****************************************************************************/
2272/* async pool handler */
2273
2274static int
2275slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2276{
2277 HV *hv = (HV *)SvRV (coro_current);
2278 struct coro *coro = (struct coro *)frame->data;
2279
2280 if (!coro->invoke_cb)
2281 return 1; /* loop till we have invoke */
2282 else
2283 {
2284 hv_store (hv, "desc", sizeof ("desc") - 1,
2285 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2286
2287 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
990 2288
991 { 2289 {
992 dSP; 2290 dSP;
993 2291 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
994 ENTER;
995 SAVETMPS;
996
997 PUSHMARK (SP);
998 PUTBACK; 2292 PUTBACK;
999 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1000
1001 FREETMPS;
1002 LEAVE;
1003 } 2293 }
2294
2295 SvREFCNT_dec (GvAV (PL_defgv));
2296 GvAV (PL_defgv) = coro->invoke_av;
2297 coro->invoke_av = 0;
2298
2299 return 0;
2300 }
2301}
2302
2303static void
2304slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2305{
2306 HV *hv = (HV *)SvRV (coro_current);
2307 struct coro *coro = SvSTATE_hv ((SV *)hv);
2308
2309 if (ecb_expect_true (coro->saved_deffh))
1004 } 2310 {
2311 /* subsequent iteration */
2312 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2313 coro->saved_deffh = 0;
1005 2314
2315 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2316 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2317 {
2318 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2319 return;
2320 }
2321 else
2322 {
2323 av_clear (GvAV (PL_defgv));
2324 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2325
2326 coro->prio = 0;
2327
2328 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2329 api_trace (aTHX_ coro_current, 0);
2330
2331 frame->prepare = prepare_schedule;
2332 av_push (av_async_pool, SvREFCNT_inc (hv));
2333 }
2334 }
2335 else
2336 {
2337 /* first iteration, simply fall through */
2338 frame->prepare = prepare_nop;
2339 }
2340
2341 frame->check = slf_check_pool_handler;
2342 frame->data = (void *)coro;
2343}
2344
2345/*****************************************************************************/
2346/* rouse callback */
2347
2348#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2349
2350static void
2351coro_rouse_callback (pTHX_ CV *cv)
2352{
2353 dXSARGS;
2354 SV *data = (SV *)S_GENSUB_ARG;
2355
2356 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2357 {
2358 /* first call, set args */
2359 SV *coro = SvRV (data);
2360 AV *av = newAV ();
2361
2362 SvRV_set (data, (SV *)av);
2363
2364 /* better take a full copy of the arguments */
2365 while (items--)
2366 av_store (av, items, newSVsv (ST (items)));
2367
2368 api_ready (aTHX_ coro);
2369 SvREFCNT_dec (coro);
2370 }
2371
2372 XSRETURN_EMPTY;
2373}
2374
2375static int
2376slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2377{
2378 SV *data = (SV *)frame->data;
2379
2380 if (CORO_THROW)
2381 return 0;
2382
2383 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2384 return 1;
2385
2386 /* now push all results on the stack */
2387 {
2388 dSP;
2389 AV *av = (AV *)SvRV (data);
2390 int i;
2391
2392 EXTEND (SP, AvFILLp (av) + 1);
2393 for (i = 0; i <= AvFILLp (av); ++i)
2394 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2395
2396 /* we have stolen the elements, so set length to zero and free */
2397 AvFILLp (av) = -1;
2398 av_undef (av);
2399
2400 PUTBACK;
2401 }
2402
2403 return 0;
2404}
2405
2406static void
2407slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2408{
2409 SV *cb;
2410
2411 if (items)
2412 cb = arg [0];
2413 else
2414 {
2415 struct coro *coro = SvSTATE_current;
2416
2417 if (!coro->rouse_cb)
2418 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2419
2420 cb = sv_2mortal (coro->rouse_cb);
2421 coro->rouse_cb = 0;
2422 }
2423
2424 if (!SvROK (cb)
2425 || SvTYPE (SvRV (cb)) != SVt_PVCV
2426 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2427 croak ("Coro::rouse_wait called with illegal callback argument,");
2428
2429 {
2430 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2431 SV *data = (SV *)S_GENSUB_ARG;
2432
2433 frame->data = (void *)data;
2434 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2435 frame->check = slf_check_rouse_wait;
2436 }
2437}
2438
2439static SV *
2440coro_new_rouse_cb (pTHX)
2441{
1006 prev = SvRV (coro_current); 2442 HV *hv = (HV *)SvRV (coro_current);
1007 SvRV_set (coro_current, next); 2443 struct coro *coro = SvSTATE_hv (hv);
2444 SV *data = newRV_inc ((SV *)hv);
2445 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
1008 2446
1009 /* free this only after the transfer */ 2447 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
1010 LOCK; 2448 SvREFCNT_dec (data); /* magicext increases the refcount */
1011 free_coro_mortal ();
1012 UNLOCK;
1013 coro_mortal = prev;
1014 2449
1015 assert (!SvROK(prev));//D 2450 SvREFCNT_dec (coro->rouse_cb);
1016 assert (!SvROK(next));//D 2451 coro->rouse_cb = SvREFCNT_inc_NN (cb);
1017 2452
1018 ta->prev = SvSTATE (prev); 2453 return cb;
1019 ta->next = SvSTATE (next);
1020
1021 assert (ta->next->flags & CF_READY);
1022 ta->next->flags &= ~CF_READY;
1023} 2454}
1024 2455
2456/*****************************************************************************/
2457/* schedule-like-function opcode (SLF) */
2458
2459static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2460static const CV *slf_cv;
2461static SV **slf_argv;
2462static int slf_argc, slf_arga; /* count, allocated */
2463static I32 slf_ax; /* top of stack, for restore */
2464
2465/* this restores the stack in the case we patched the entersub, to */
2466/* recreate the stack frame as perl will on following calls */
2467/* since entersub cleared the stack */
2468static OP *
2469pp_restore (pTHX)
2470{
2471 int i;
2472 SV **SP = PL_stack_base + slf_ax;
2473
2474 PUSHMARK (SP);
2475
2476 EXTEND (SP, slf_argc + 1);
2477
2478 for (i = 0; i < slf_argc; ++i)
2479 PUSHs (sv_2mortal (slf_argv [i]));
2480
2481 PUSHs ((SV *)CvGV (slf_cv));
2482
2483 RETURNOP (slf_restore.op_first);
2484}
2485
1025static void 2486static void
2487slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2488{
2489 SV **arg = (SV **)slf_frame.data;
2490
2491 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2492}
2493
2494static void
2495slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2496{
2497 if (items != 2)
2498 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2499
2500 frame->prepare = slf_prepare_transfer;
2501 frame->check = slf_check_nop;
2502 frame->data = (void *)arg; /* let's hope it will stay valid */
2503}
2504
2505static void
2506slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2507{
2508 frame->prepare = prepare_schedule;
2509 frame->check = slf_check_nop;
2510}
2511
2512static void
1026prepare_cede (struct transfer_args *ta) 2513slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
1027{ 2514{
2515 struct coro *next = (struct coro *)slf_frame.data;
2516
2517 SvREFCNT_inc_NN (next->hv);
2518 prepare_schedule_to (aTHX_ ta, next);
2519}
2520
2521static void
2522slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2523{
2524 if (!items)
2525 croak ("Coro::schedule_to expects a coroutine argument, caught");
2526
2527 frame->data = (void *)SvSTATE (arg [0]);
2528 frame->prepare = slf_prepare_schedule_to;
2529 frame->check = slf_check_nop;
2530}
2531
2532static void
2533slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2534{
1028 api_ready (coro_current); 2535 api_ready (aTHX_ SvRV (coro_current));
1029 2536
1030 prepare_schedule (ta); 2537 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
1031} 2538}
1032 2539
1033static void 2540static void
1034api_schedule (void) 2541slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1035{ 2542{
2543 frame->prepare = prepare_cede;
2544 frame->check = slf_check_nop;
2545}
2546
2547static void
2548slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2549{
2550 frame->prepare = prepare_cede_notself;
2551 frame->check = slf_check_nop;
2552}
2553
2554/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2555static void
2556slf_destroy (pTHX_ struct coro *coro)
2557{
2558 /* this callback is reserved for slf functions needing to do cleanup */
2559 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2560 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2561
2562 /*
2563 * The on_destroy above most likely is from an SLF call.
2564 * Since by definition the SLF call will not finish when we destroy
2565 * the coro, we will have to force-finish it here, otherwise
2566 * cleanup functions cannot call SLF functions.
2567 */
2568 coro->slf_frame.prepare = 0;
2569}
2570
2571/*
2572 * these not obviously related functions are all rolled into one
2573 * function to increase chances that they all will call transfer with the same
2574 * stack offset
2575 * SLF stands for "schedule-like-function".
2576 */
2577static OP *
2578pp_slf (pTHX)
2579{
2580 I32 checkmark; /* mark SP to see how many elements check has pushed */
2581
2582 /* set up the slf frame, unless it has already been set-up */
2583 /* the latter happens when a new coro has been started */
2584 /* or when a new cctx was attached to an existing coroutine */
2585 if (ecb_expect_true (!slf_frame.prepare))
2586 {
2587 /* first iteration */
2588 dSP;
2589 SV **arg = PL_stack_base + TOPMARK + 1;
2590 int items = SP - arg; /* args without function object */
2591 SV *gv = *sp;
2592
2593 /* do a quick consistency check on the "function" object, and if it isn't */
2594 /* for us, divert to the real entersub */
2595 if (SvTYPE (gv) != SVt_PVGV
2596 || !GvCV (gv)
2597 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2598 return PL_ppaddr[OP_ENTERSUB](aTHX);
2599
2600 if (!(PL_op->op_flags & OPf_STACKED))
2601 {
2602 /* ampersand-form of call, use @_ instead of stack */
2603 AV *av = GvAV (PL_defgv);
2604 arg = AvARRAY (av);
2605 items = AvFILLp (av) + 1;
2606 }
2607
2608 /* now call the init function, which needs to set up slf_frame */
2609 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2610 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2611
2612 /* pop args */
2613 SP = PL_stack_base + POPMARK;
2614
2615 PUTBACK;
2616 }
2617
2618 /* now that we have a slf_frame, interpret it! */
2619 /* we use a callback system not to make the code needlessly */
2620 /* complicated, but so we can run multiple perl coros from one cctx */
2621
2622 do
2623 {
1036 struct transfer_args ta; 2624 struct coro_transfer_args ta;
1037 2625
1038 prepare_schedule (&ta); 2626 slf_frame.prepare (aTHX_ &ta);
1039 TRANSFER (ta); 2627 TRANSFER (ta, 0);
1040}
1041 2628
2629 checkmark = PL_stack_sp - PL_stack_base;
2630 }
2631 while (slf_frame.check (aTHX_ &slf_frame));
2632
2633 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2634
2635 /* exception handling */
2636 if (ecb_expect_false (CORO_THROW))
2637 {
2638 SV *exception = sv_2mortal (CORO_THROW);
2639
2640 CORO_THROW = 0;
2641 sv_setsv (ERRSV, exception);
2642 croak (0);
2643 }
2644
2645 /* return value handling - mostly like entersub */
2646 /* make sure we put something on the stack in scalar context */
2647 if (GIMME_V == G_SCALAR
2648 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2649 {
2650 dSP;
2651 SV **bot = PL_stack_base + checkmark;
2652
2653 if (sp == bot) /* too few, push undef */
2654 bot [1] = &PL_sv_undef;
2655 else /* too many, take last one */
2656 bot [1] = *sp;
2657
2658 SP = bot + 1;
2659
2660 PUTBACK;
2661 }
2662
2663 return NORMAL;
2664}
2665
2666static void
2667api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2668{
2669 int i;
2670 SV **arg = PL_stack_base + ax;
2671 int items = PL_stack_sp - arg + 1;
2672
2673 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2674
2675 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2676 && PL_op->op_ppaddr != pp_slf)
2677 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2678
2679 CvFLAGS (cv) |= CVf_SLF;
2680 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2681 slf_cv = cv;
2682
2683 /* we patch the op, and then re-run the whole call */
2684 /* we have to put the same argument on the stack for this to work */
2685 /* and this will be done by pp_restore */
2686 slf_restore.op_next = (OP *)&slf_restore;
2687 slf_restore.op_type = OP_CUSTOM;
2688 slf_restore.op_ppaddr = pp_restore;
2689 slf_restore.op_first = PL_op;
2690
2691 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2692
2693 if (PL_op->op_flags & OPf_STACKED)
2694 {
2695 if (items > slf_arga)
2696 {
2697 slf_arga = items;
2698 Safefree (slf_argv);
2699 New (0, slf_argv, slf_arga, SV *);
2700 }
2701
2702 slf_argc = items;
2703
2704 for (i = 0; i < items; ++i)
2705 slf_argv [i] = SvREFCNT_inc (arg [i]);
2706 }
2707 else
2708 slf_argc = 0;
2709
2710 PL_op->op_ppaddr = pp_slf;
2711 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2712
2713 PL_op = (OP *)&slf_restore;
2714}
2715
2716/*****************************************************************************/
2717/* dynamic wind */
2718
2719static void
2720on_enterleave_call (pTHX_ SV *cb)
2721{
2722 dSP;
2723
2724 PUSHSTACK;
2725
2726 PUSHMARK (SP);
2727 PUTBACK;
2728 call_sv (cb, G_VOID | G_DISCARD);
2729 SPAGAIN;
2730
2731 POPSTACK;
2732}
2733
2734static SV *
2735coro_avp_pop_and_free (pTHX_ AV **avp)
2736{
2737 AV *av = *avp;
2738 SV *res = av_pop (av);
2739
2740 if (AvFILLp (av) < 0)
2741 {
2742 *avp = 0;
2743 SvREFCNT_dec (av);
2744 }
2745
2746 return res;
2747}
2748
2749static void
2750coro_pop_on_enter (pTHX_ void *coro)
2751{
2752 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2753 SvREFCNT_dec (cb);
2754}
2755
2756static void
2757coro_pop_on_leave (pTHX_ void *coro)
2758{
2759 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2760 on_enterleave_call (aTHX_ sv_2mortal (cb));
2761}
2762
2763/*****************************************************************************/
2764/* PerlIO::cede */
2765
2766typedef struct
2767{
2768 PerlIOBuf base;
2769 NV next, every;
2770} PerlIOCede;
2771
2772static IV ecb_cold
2773PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2774{
2775 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2776
2777 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2778 self->next = nvtime () + self->every;
2779
2780 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2781}
2782
2783static SV * ecb_cold
2784PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2785{
2786 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2787
2788 return newSVnv (self->every);
2789}
2790
2791static IV
2792PerlIOCede_flush (pTHX_ PerlIO *f)
2793{
2794 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2795 double now = nvtime ();
2796
2797 if (now >= self->next)
2798 {
2799 api_cede (aTHX);
2800 self->next = now + self->every;
2801 }
2802
2803 return PerlIOBuf_flush (aTHX_ f);
2804}
2805
2806static PerlIO_funcs PerlIO_cede =
2807{
2808 sizeof(PerlIO_funcs),
2809 "cede",
2810 sizeof(PerlIOCede),
2811 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2812 PerlIOCede_pushed,
2813 PerlIOBuf_popped,
2814 PerlIOBuf_open,
2815 PerlIOBase_binmode,
2816 PerlIOCede_getarg,
2817 PerlIOBase_fileno,
2818 PerlIOBuf_dup,
2819 PerlIOBuf_read,
2820 PerlIOBuf_unread,
2821 PerlIOBuf_write,
2822 PerlIOBuf_seek,
2823 PerlIOBuf_tell,
2824 PerlIOBuf_close,
2825 PerlIOCede_flush,
2826 PerlIOBuf_fill,
2827 PerlIOBase_eof,
2828 PerlIOBase_error,
2829 PerlIOBase_clearerr,
2830 PerlIOBase_setlinebuf,
2831 PerlIOBuf_get_base,
2832 PerlIOBuf_bufsiz,
2833 PerlIOBuf_get_ptr,
2834 PerlIOBuf_get_cnt,
2835 PerlIOBuf_set_ptrcnt,
2836};
2837
2838/*****************************************************************************/
2839/* Coro::Semaphore & Coro::Signal */
2840
2841static SV *
2842coro_waitarray_new (pTHX_ int count)
2843{
2844 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2845 AV *av = newAV ();
2846 SV **ary;
2847
2848 /* unfortunately, building manually saves memory */
2849 Newx (ary, 2, SV *);
2850 AvALLOC (av) = ary;
2851#if PERL_VERSION_ATLEAST (5,10,0)
2852 AvARRAY (av) = ary;
2853#else
2854 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2855 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2856 SvPVX ((SV *)av) = (char *)ary;
2857#endif
2858 AvMAX (av) = 1;
2859 AvFILLp (av) = 0;
2860 ary [0] = newSViv (count);
2861
2862 return newRV_noinc ((SV *)av);
2863}
2864
2865/* semaphore */
2866
2867static void
2868coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2869{
2870 SV *count_sv = AvARRAY (av)[0];
2871 IV count = SvIVX (count_sv);
2872
2873 count += adjust;
2874 SvIVX (count_sv) = count;
2875
2876 /* now wake up as many waiters as are expected to lock */
2877 while (count > 0 && AvFILLp (av) > 0)
2878 {
2879 SV *cb;
2880
2881 /* swap first two elements so we can shift a waiter */
2882 AvARRAY (av)[0] = AvARRAY (av)[1];
2883 AvARRAY (av)[1] = count_sv;
2884 cb = av_shift (av);
2885
2886 if (SvOBJECT (cb))
2887 {
2888 api_ready (aTHX_ cb);
2889 --count;
2890 }
2891 else if (SvTYPE (cb) == SVt_PVCV)
2892 {
2893 dSP;
2894 PUSHMARK (SP);
2895 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2896 PUTBACK;
2897 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2898 }
2899
2900 SvREFCNT_dec (cb);
2901 }
2902}
2903
2904static void
2905coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2906{
2907 /* call $sem->adjust (0) to possibly wake up some other waiters */
2908 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2909}
2910
1042static void 2911static int
1043api_cede (void) 2912slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
1044{ 2913{
1045 struct transfer_args ta; 2914 AV *av = (AV *)frame->data;
2915 SV *count_sv = AvARRAY (av)[0];
2916 SV *coro_hv = SvRV (coro_current);
1046 2917
1047 prepare_cede (&ta); 2918 /* if we are about to throw, don't actually acquire the lock, just throw */
1048 TRANSFER (ta); 2919 if (CORO_THROW)
1049} 2920 return 0;
2921 else if (SvIVX (count_sv) > 0)
2922 {
2923 frame->destroy = 0;
1050 2924
2925 if (acquire)
2926 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2927 else
2928 coro_semaphore_adjust (aTHX_ av, 0);
2929
2930 return 0;
2931 }
2932 else
2933 {
2934 int i;
2935 /* if we were woken up but can't down, we look through the whole */
2936 /* waiters list and only add us if we aren't in there already */
2937 /* this avoids some degenerate memory usage cases */
2938 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
2939 if (AvARRAY (av)[i] == coro_hv)
2940 return 1;
2941
2942 av_push (av, SvREFCNT_inc (coro_hv));
2943 return 1;
2944 }
2945}
2946
2947static int
2948slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2949{
2950 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2951}
2952
2953static int
2954slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2955{
2956 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2957}
2958
2959static void
2960slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2961{
2962 AV *av = (AV *)SvRV (arg [0]);
2963
2964 if (SvIVX (AvARRAY (av)[0]) > 0)
2965 {
2966 frame->data = (void *)av;
2967 frame->prepare = prepare_nop;
2968 }
2969 else
2970 {
2971 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2972
2973 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2974 frame->prepare = prepare_schedule;
2975 /* to avoid race conditions when a woken-up coro gets terminated */
2976 /* we arrange for a temporary on_destroy that calls adjust (0) */
2977 frame->destroy = coro_semaphore_destroy;
2978 }
2979}
2980
2981static void
2982slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2983{
2984 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2985 frame->check = slf_check_semaphore_down;
2986}
2987
2988static void
2989slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2990{
2991 if (items >= 2)
2992 {
2993 /* callback form */
2994 AV *av = (AV *)SvRV (arg [0]);
2995 SV *cb_cv = s_get_cv_croak (arg [1]);
2996
2997 av_push (av, SvREFCNT_inc_NN (cb_cv));
2998
2999 if (SvIVX (AvARRAY (av)[0]) > 0)
3000 coro_semaphore_adjust (aTHX_ av, 0);
3001
3002 frame->prepare = prepare_nop;
3003 frame->check = slf_check_nop;
3004 }
3005 else
3006 {
3007 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3008 frame->check = slf_check_semaphore_wait;
3009 }
3010}
3011
3012/* signal */
3013
3014static void
3015coro_signal_wake (pTHX_ AV *av, int count)
3016{
3017 SvIVX (AvARRAY (av)[0]) = 0;
3018
3019 /* now signal count waiters */
3020 while (count > 0 && AvFILLp (av) > 0)
3021 {
3022 SV *cb;
3023
3024 /* swap first two elements so we can shift a waiter */
3025 cb = AvARRAY (av)[0];
3026 AvARRAY (av)[0] = AvARRAY (av)[1];
3027 AvARRAY (av)[1] = cb;
3028
3029 cb = av_shift (av);
3030
3031 if (SvTYPE (cb) == SVt_PVCV)
3032 {
3033 dSP;
3034 PUSHMARK (SP);
3035 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3036 PUTBACK;
3037 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3038 }
3039 else
3040 {
3041 api_ready (aTHX_ cb);
3042 sv_setiv (cb, 0); /* signal waiter */
3043 }
3044
3045 SvREFCNT_dec (cb);
3046
3047 --count;
3048 }
3049}
3050
3051static int
3052slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3053{
3054 /* if we are about to throw, also stop waiting */
3055 return SvROK ((SV *)frame->data) && !CORO_THROW;
3056}
3057
3058static void
3059slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3060{
3061 AV *av = (AV *)SvRV (arg [0]);
3062
3063 if (items >= 2)
3064 {
3065 SV *cb_cv = s_get_cv_croak (arg [1]);
3066 av_push (av, SvREFCNT_inc_NN (cb_cv));
3067
3068 if (SvIVX (AvARRAY (av)[0]))
3069 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3070
3071 frame->prepare = prepare_nop;
3072 frame->check = slf_check_nop;
3073 }
3074 else if (SvIVX (AvARRAY (av)[0]))
3075 {
3076 SvIVX (AvARRAY (av)[0]) = 0;
3077 frame->prepare = prepare_nop;
3078 frame->check = slf_check_nop;
3079 }
3080 else
3081 {
3082 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3083
3084 av_push (av, waiter);
3085
3086 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3087 frame->prepare = prepare_schedule;
3088 frame->check = slf_check_signal_wait;
3089 }
3090}
3091
3092/*****************************************************************************/
3093/* Coro::AIO */
3094
3095#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3096
3097/* helper storage struct */
3098struct io_state
3099{
3100 int errorno;
3101 I32 laststype; /* U16 in 5.10.0 */
3102 int laststatval;
3103 Stat_t statcache;
3104};
3105
3106static void
3107coro_aio_callback (pTHX_ CV *cv)
3108{
3109 dXSARGS;
3110 AV *state = (AV *)S_GENSUB_ARG;
3111 SV *coro = av_pop (state);
3112 SV *data_sv = newSV (sizeof (struct io_state));
3113
3114 av_extend (state, items - 1);
3115
3116 sv_upgrade (data_sv, SVt_PV);
3117 SvCUR_set (data_sv, sizeof (struct io_state));
3118 SvPOK_only (data_sv);
3119
3120 {
3121 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3122
3123 data->errorno = errno;
3124 data->laststype = PL_laststype;
3125 data->laststatval = PL_laststatval;
3126 data->statcache = PL_statcache;
3127 }
3128
3129 /* now build the result vector out of all the parameters and the data_sv */
3130 {
3131 int i;
3132
3133 for (i = 0; i < items; ++i)
3134 av_push (state, SvREFCNT_inc_NN (ST (i)));
3135 }
3136
3137 av_push (state, data_sv);
3138
3139 api_ready (aTHX_ coro);
3140 SvREFCNT_dec (coro);
3141 SvREFCNT_dec ((AV *)state);
3142}
3143
3144static int
3145slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3146{
3147 AV *state = (AV *)frame->data;
3148
3149 /* if we are about to throw, return early */
3150 /* this does not cancel the aio request, but at least */
3151 /* it quickly returns */
3152 if (CORO_THROW)
3153 return 0;
3154
3155 /* one element that is an RV? repeat! */
3156 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3157 return 1;
3158
3159 /* restore status */
3160 {
3161 SV *data_sv = av_pop (state);
3162 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3163
3164 errno = data->errorno;
3165 PL_laststype = data->laststype;
3166 PL_laststatval = data->laststatval;
3167 PL_statcache = data->statcache;
3168
3169 SvREFCNT_dec (data_sv);
3170 }
3171
3172 /* push result values */
3173 {
3174 dSP;
3175 int i;
3176
3177 EXTEND (SP, AvFILLp (state) + 1);
3178 for (i = 0; i <= AvFILLp (state); ++i)
3179 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3180
3181 PUTBACK;
3182 }
3183
3184 return 0;
3185}
3186
3187static void
3188slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3189{
3190 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3191 SV *coro_hv = SvRV (coro_current);
3192 struct coro *coro = SvSTATE_hv (coro_hv);
3193
3194 /* put our coroutine id on the state arg */
3195 av_push (state, SvREFCNT_inc_NN (coro_hv));
3196
3197 /* first see whether we have a non-zero priority and set it as AIO prio */
3198 if (coro->prio)
3199 {
3200 dSP;
3201
3202 static SV *prio_cv;
3203 static SV *prio_sv;
3204
3205 if (ecb_expect_false (!prio_cv))
3206 {
3207 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3208 prio_sv = newSViv (0);
3209 }
3210
3211 PUSHMARK (SP);
3212 sv_setiv (prio_sv, coro->prio);
3213 XPUSHs (prio_sv);
3214
3215 PUTBACK;
3216 call_sv (prio_cv, G_VOID | G_DISCARD);
3217 }
3218
3219 /* now call the original request */
3220 {
3221 dSP;
3222 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3223 int i;
3224
3225 PUSHMARK (SP);
3226
3227 /* first push all args to the stack */
3228 EXTEND (SP, items + 1);
3229
3230 for (i = 0; i < items; ++i)
3231 PUSHs (arg [i]);
3232
3233 /* now push the callback closure */
3234 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3235
3236 /* now call the AIO function - we assume our request is uncancelable */
3237 PUTBACK;
3238 call_sv ((SV *)req, G_VOID | G_DISCARD);
3239 }
3240
3241 /* now that the request is going, we loop till we have a result */
3242 frame->data = (void *)state;
3243 frame->prepare = prepare_schedule;
3244 frame->check = slf_check_aio_req;
3245}
3246
3247static void
3248coro_aio_req_xs (pTHX_ CV *cv)
3249{
3250 dXSARGS;
3251
3252 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3253
3254 XSRETURN_EMPTY;
3255}
3256
3257/*****************************************************************************/
3258
3259#if CORO_CLONE
3260# include "clone.c"
3261#endif
3262
3263/*****************************************************************************/
3264
3265static SV *
3266coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3267{
3268 SV *coro_sv;
3269 struct coro *coro;
3270 MAGIC *mg;
3271 HV *hv;
3272 SV *cb;
3273 int i;
3274
3275 if (argc > 0)
3276 {
3277 cb = s_get_cv_croak (argv [0]);
3278
3279 if (!is_coro)
3280 {
3281 if (CvISXSUB (cb))
3282 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3283
3284 if (!CvROOT (cb))
3285 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3286 }
3287 }
3288
3289 Newz (0, coro, 1, struct coro);
3290 coro->args = newAV ();
3291 coro->flags = CF_NEW;
3292
3293 if (coro_first) coro_first->prev = coro;
3294 coro->next = coro_first;
3295 coro_first = coro;
3296
3297 coro->hv = hv = newHV ();
3298 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3299 mg->mg_flags |= MGf_DUP;
3300 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3301
3302 if (argc > 0)
3303 {
3304 av_extend (coro->args, argc + is_coro - 1);
3305
3306 if (is_coro)
3307 {
3308 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3309 cb = (SV *)cv_coro_run;
3310 }
3311
3312 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3313
3314 for (i = 1; i < argc; i++)
3315 av_push (coro->args, newSVsv (argv [i]));
3316 }
3317
3318 return coro_sv;
3319}
3320
3321#ifndef __cplusplus
3322ecb_cold XS(boot_Coro__State);
3323#endif
3324
3325#if CORO_JIT
3326
3327static void ecb_noinline ecb_cold
3328pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3329{
3330 dSP;
3331 AV *av = newAV ();
3332
3333 av_store (av, 3, newSVuv (d));
3334 av_store (av, 2, newSVuv (c));
3335 av_store (av, 1, newSVuv (b));
3336 av_store (av, 0, newSVuv (a));
3337
3338 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3339
3340 PUTBACK;
3341}
3342
3343static void ecb_noinline ecb_cold
3344jit_init (pTHX)
3345{
3346 dSP;
3347 SV *load, *save;
3348 char *map_base;
3349 char *load_ptr, *save_ptr;
3350 STRLEN load_len, save_len, map_len;
3351 int count;
3352
3353 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3354
3355 PUSHMARK (SP);
3356 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3357 #include "state.h"
3358 count = call_pv ("Coro::State::_jit", G_ARRAY);
3359 SPAGAIN;
3360
3361 save = POPs; save_ptr = SvPVbyte (save, save_len);
3362 load = POPs; load_ptr = SvPVbyte (load, load_len);
3363
3364 map_len = load_len + save_len + 16;
3365
3366 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3367
3368 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3369
3370 load_perl_slots = (load_save_perl_slots_type)map_base;
3371 memcpy (map_base, load_ptr, load_len);
3372
3373 map_base += (load_len + 15) & ~15;
3374
3375 save_perl_slots = (load_save_perl_slots_type)map_base;
3376 memcpy (map_base, save_ptr, save_len);
3377
3378 /* we are good citizens and try to make the page read-only, so the evil evil */
3379 /* hackers might have it a bit more difficult */
3380 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3381
3382 PUTBACK;
3383 eval_pv ("undef &Coro::State::_jit", 1);
3384}
3385
3386#endif
3387
1051MODULE = Coro::State PACKAGE = Coro::State 3388MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1052 3389
1053PROTOTYPES: DISABLE 3390PROTOTYPES: DISABLE
1054 3391
1055BOOT: 3392BOOT:
1056{ 3393{
1057#ifdef USE_ITHREADS 3394#ifdef USE_ITHREADS
1058 MUTEX_INIT (&coro_mutex); 3395# if CORO_PTHREAD
3396 coro_thx = PERL_GET_CONTEXT;
3397# endif
1059#endif 3398#endif
1060 BOOT_PAGESIZE; 3399 /* perl defines these to check for existance first, but why it doesn't */
3400 /* just create them one at init time is not clear to me, except for */
3401 /* programs trying to delete them, but... */
3402 /* anyway, we declare this as invalid and make sure they are initialised here */
3403 DEFSV;
3404 ERRSV;
3405
3406 cctx_current = cctx_new_empty ();
3407
3408 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3409 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3410
3411 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3412 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3413 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3414
3415 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3416 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3417 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1061 3418
1062 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3419 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1063 3420
3421 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
3422 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1064 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 3423 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1065 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1066 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1067 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1068 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 3424 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1069 3425
1070 main_mainstack = PL_mainstack; 3426 main_mainstack = PL_mainstack;
3427 main_top_env = PL_top_env;
1071 3428
3429 while (main_top_env->je_prev)
3430 main_top_env = main_top_env->je_prev;
3431
3432 {
3433 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3434
3435 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3436 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3437
3438 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3439 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3440 }
3441
1072 coroapi.ver = CORO_API_VERSION; 3442 coroapi.ver = CORO_API_VERSION;
3443 coroapi.rev = CORO_API_REVISION;
3444
1073 coroapi.transfer = api_transfer; 3445 coroapi.transfer = api_transfer;
1074 3446
3447 coroapi.sv_state = SvSTATE_;
3448 coroapi.execute_slf = api_execute_slf;
3449 coroapi.prepare_nop = prepare_nop;
3450 coroapi.prepare_schedule = prepare_schedule;
3451 coroapi.prepare_cede = prepare_cede;
3452 coroapi.prepare_cede_notself = prepare_cede_notself;
3453
3454 time_init (aTHX);
3455
1075 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3456 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3457#if CORO_JIT
3458 PUTBACK;
3459 jit_init (aTHX);
3460 SPAGAIN;
3461#endif
1076} 3462}
1077 3463
1078SV * 3464SV *
1079new (char *klass, ...) 3465new (SV *klass, ...)
3466 ALIAS:
3467 Coro::new = 1
1080 CODE: 3468 CODE:
1081{ 3469 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1082 struct coro *coro;
1083 HV *hv;
1084 int i;
1085
1086 Newz (0, coro, 1, struct coro);
1087 coro->args = newAV ();
1088 coro->save = CORO_SAVE_ALL;
1089 coro->flags = CF_NEW;
1090
1091 hv = newHV ();
1092 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1093 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1094
1095 for (i = 1; i < items; i++)
1096 av_push (coro->args, newSVsv (ST (i)));
1097}
1098 OUTPUT:
1099 RETVAL
1100
1101int
1102save (SV *coro, int new_save = -1)
1103 CODE:
1104 RETVAL = api_save (coro, new_save);
1105 OUTPUT: 3470 OUTPUT:
1106 RETVAL 3471 RETVAL
1107 3472
1108void 3473void
1109_set_stacklevel (...) 3474transfer (...)
1110 ALIAS: 3475 PROTOTYPE: $$
1111 Coro::State::transfer = 1 3476 CODE:
1112 Coro::schedule = 2 3477 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1113 Coro::cede = 3
1114 CODE:
1115{
1116 struct transfer_args ta;
1117 3478
1118 switch (ix) 3479SV *
3480clone (Coro::State coro)
3481 CODE:
3482{
3483#if CORO_CLONE
3484 struct coro *ncoro = coro_clone (aTHX_ coro);
3485 MAGIC *mg;
3486 /* TODO: too much duplication */
3487 ncoro->hv = newHV ();
3488 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3489 mg->mg_flags |= MGf_DUP;
3490 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3491#else
3492 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3493#endif
3494}
3495 OUTPUT:
3496 RETVAL
3497
3498int
3499cctx_stacksize (int new_stacksize = 0)
3500 PROTOTYPE: ;$
3501 CODE:
3502 RETVAL = cctx_stacksize;
3503 if (new_stacksize)
1119 { 3504 {
1120 case 0: 3505 cctx_stacksize = new_stacksize;
1121 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 3506 ++cctx_gen;
1122 ta.next = 0;
1123 break;
1124
1125 case 1:
1126 if (items != 2)
1127 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1128
1129 prepare_transfer (&ta, ST (0), ST (1));
1130 break;
1131
1132 case 2:
1133 prepare_schedule (&ta);
1134 break;
1135
1136 case 3:
1137 prepare_cede (&ta);
1138 break;
1139 } 3507 }
3508 OUTPUT:
3509 RETVAL
1140 3510
1141 TRANSFER (ta); 3511int
1142} 3512cctx_max_idle (int max_idle = 0)
1143 3513 PROTOTYPE: ;$
1144void
1145_clone_state_from (SV *dst, SV *src)
1146 CODE: 3514 CODE:
1147{ 3515 RETVAL = cctx_max_idle;
1148 struct coro *coro_src = SvSTATE (src); 3516 if (max_idle > 1)
1149 3517 cctx_max_idle = max_idle;
1150 sv_unmagic (SvRV (dst), PERL_MAGIC_ext); 3518 OUTPUT:
1151 3519 RETVAL
1152 ++coro_src->refcnt;
1153 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1154}
1155
1156void
1157_exit (code)
1158 int code
1159 PROTOTYPE: $
1160 CODE:
1161 _exit (code);
1162 3520
1163int 3521int
1164cctx_count () 3522cctx_count ()
3523 PROTOTYPE:
1165 CODE: 3524 CODE:
1166 RETVAL = cctx_count; 3525 RETVAL = cctx_count;
1167 OUTPUT: 3526 OUTPUT:
1168 RETVAL 3527 RETVAL
1169 3528
1170int 3529int
1171cctx_idle () 3530cctx_idle ()
3531 PROTOTYPE:
1172 CODE: 3532 CODE:
1173 RETVAL = cctx_idle; 3533 RETVAL = cctx_idle;
1174 OUTPUT: 3534 OUTPUT:
1175 RETVAL 3535 RETVAL
1176 3536
3537void
3538list ()
3539 PROTOTYPE:
3540 PPCODE:
3541{
3542 struct coro *coro;
3543 for (coro = coro_first; coro; coro = coro->next)
3544 if (coro->hv)
3545 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3546}
3547
3548void
3549call (Coro::State coro, SV *coderef)
3550 ALIAS:
3551 eval = 1
3552 CODE:
3553{
3554 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3555 {
3556 struct coro *current = SvSTATE_current;
3557 struct CoroSLF slf_save;
3558
3559 if (current != coro)
3560 {
3561 PUTBACK;
3562 save_perl (aTHX_ current);
3563 load_perl (aTHX_ coro);
3564 /* the coro is most likely in an active SLF call.
3565 * while not strictly required (the code we execute is
3566 * not allowed to call any SLF functions), it's cleaner
3567 * to reinitialise the slf_frame and restore it later.
3568 * This might one day allow us to actually do SLF calls
3569 * from code executed here.
3570 */
3571 slf_save = slf_frame;
3572 slf_frame.prepare = 0;
3573 SPAGAIN;
3574 }
3575
3576 PUSHSTACK;
3577
3578 PUSHMARK (SP);
3579 PUTBACK;
3580
3581 if (ix)
3582 eval_sv (coderef, 0);
3583 else
3584 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3585
3586 POPSTACK;
3587 SPAGAIN;
3588
3589 if (current != coro)
3590 {
3591 PUTBACK;
3592 slf_frame = slf_save;
3593 save_perl (aTHX_ coro);
3594 load_perl (aTHX_ current);
3595 SPAGAIN;
3596 }
3597 }
3598}
3599
3600SV *
3601is_ready (Coro::State coro)
3602 PROTOTYPE: $
3603 ALIAS:
3604 is_ready = CF_READY
3605 is_running = CF_RUNNING
3606 is_new = CF_NEW
3607 is_destroyed = CF_ZOMBIE
3608 is_zombie = CF_ZOMBIE
3609 is_suspended = CF_SUSPENDED
3610 CODE:
3611 RETVAL = boolSV (coro->flags & ix);
3612 OUTPUT:
3613 RETVAL
3614
3615void
3616throw (SV *self, SV *exception = &PL_sv_undef)
3617 PROTOTYPE: $;$
3618 CODE:
3619{
3620 struct coro *coro = SvSTATE (self);
3621 struct coro *current = SvSTATE_current;
3622 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3623 SvREFCNT_dec (*exceptionp);
3624 SvGETMAGIC (exception);
3625 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3626
3627 api_ready (aTHX_ self);
3628}
3629
3630void
3631api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3632 PROTOTYPE: $;$
3633 C_ARGS: aTHX_ coro, flags
3634
3635SV *
3636has_cctx (Coro::State coro)
3637 PROTOTYPE: $
3638 CODE:
3639 /* maybe manage the running flag differently */
3640 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3641 OUTPUT:
3642 RETVAL
3643
3644int
3645is_traced (Coro::State coro)
3646 PROTOTYPE: $
3647 CODE:
3648 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3649 OUTPUT:
3650 RETVAL
3651
3652UV
3653rss (Coro::State coro)
3654 PROTOTYPE: $
3655 ALIAS:
3656 usecount = 1
3657 CODE:
3658 switch (ix)
3659 {
3660 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3661 case 1: RETVAL = coro->usecount; break;
3662 }
3663 OUTPUT:
3664 RETVAL
3665
3666void
3667force_cctx ()
3668 PROTOTYPE:
3669 CODE:
3670 cctx_current->idle_sp = 0;
3671
3672void
3673swap_defsv (Coro::State self)
3674 PROTOTYPE: $
3675 ALIAS:
3676 swap_defav = 1
3677 CODE:
3678 if (!self->slot)
3679 croak ("cannot swap state with coroutine that has no saved state,");
3680 else
3681 {
3682 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3683 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3684
3685 SV *tmp = *src; *src = *dst; *dst = tmp;
3686 }
3687
3688void
3689cancel (Coro::State self)
3690 CODE:
3691 coro_state_destroy (aTHX_ self);
3692
3693SV *
3694enable_times (int enabled = enable_times)
3695 CODE:
3696{
3697 RETVAL = boolSV (enable_times);
3698
3699 if (enabled != enable_times)
3700 {
3701 enable_times = enabled;
3702
3703 coro_times_update ();
3704 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3705 }
3706}
3707 OUTPUT:
3708 RETVAL
3709
3710void
3711times (Coro::State self)
3712 PPCODE:
3713{
3714 struct coro *current = SvSTATE (coro_current);
3715
3716 if (ecb_expect_false (current == self))
3717 {
3718 coro_times_update ();
3719 coro_times_add (SvSTATE (coro_current));
3720 }
3721
3722 EXTEND (SP, 2);
3723 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3724 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3725
3726 if (ecb_expect_false (current == self))
3727 coro_times_sub (SvSTATE (coro_current));
3728}
3729
3730void
3731swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3732 CODE:
3733{
3734 struct coro *current = SvSTATE_current;
3735
3736 if (current == coro)
3737 SWAP_SVS (current);
3738
3739 if (!coro->swap_sv)
3740 coro->swap_sv = newAV ();
3741
3742 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3743 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3744
3745 if (current == coro)
3746 SWAP_SVS (current);
3747}
3748
3749
1177MODULE = Coro::State PACKAGE = Coro 3750MODULE = Coro::State PACKAGE = Coro
1178 3751
1179BOOT: 3752BOOT:
1180{ 3753{
1181 int i; 3754 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3755 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3756 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3757 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3758 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3759 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3760 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3761 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1182 3762
3763 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3764 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3765 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3766 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3767
1183 coro_stash = gv_stashpv ("Coro", TRUE); 3768 coro_stash = gv_stashpv ("Coro", TRUE);
1184 3769
1185 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3770 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1186 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3771 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1187 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3772 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1188 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3773 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1189 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3774 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1190 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3775 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1191
1192 coro_current = get_sv ("Coro::current", FALSE);
1193 SvREADONLY_on (coro_current);
1194
1195 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1196 coro_ready[i] = newAV ();
1197 3776
1198 { 3777 {
1199 SV *sv = perl_get_sv("Coro::API", 1); 3778 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1200 3779
1201 coroapi.schedule = api_schedule; 3780 coroapi.schedule = api_schedule;
1202 coroapi.save = api_save; 3781 coroapi.schedule_to = api_schedule_to;
1203 coroapi.cede = api_cede; 3782 coroapi.cede = api_cede;
3783 coroapi.cede_notself = api_cede_notself;
1204 coroapi.ready = api_ready; 3784 coroapi.ready = api_ready;
1205 coroapi.is_ready = api_is_ready; 3785 coroapi.is_ready = api_is_ready;
1206 coroapi.nready = &coro_nready; 3786 coroapi.nready = coro_nready;
1207 coroapi.current = coro_current; 3787 coroapi.current = coro_current;
1208 3788
1209 GCoroAPI = &coroapi; 3789 /*GCoroAPI = &coroapi;*/
1210 sv_setiv (sv, (IV)&coroapi); 3790 sv_setiv (sv, (IV)&coroapi);
1211 SvREADONLY_on (sv); 3791 SvREADONLY_on (sv);
1212 } 3792 }
1213} 3793}
3794
3795SV *
3796async (...)
3797 PROTOTYPE: &@
3798 CODE:
3799 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3800 api_ready (aTHX_ RETVAL);
3801 OUTPUT:
3802 RETVAL
3803
3804void
3805_destroy (Coro::State coro)
3806 CODE:
3807 /* used by the manager thread */
3808 coro_state_destroy (aTHX_ coro);
3809
3810void
3811on_destroy (Coro::State coro, SV *cb)
3812 CODE:
3813 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3814
3815void
3816join (...)
3817 CODE:
3818 CORO_EXECUTE_SLF_XS (slf_init_join);
3819
3820void
3821terminate (...)
3822 CODE:
3823 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3824
3825void
3826cancel (...)
3827 CODE:
3828 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3829
3830int
3831safe_cancel (Coro::State self, ...)
3832 C_ARGS: aTHX_ self, &ST (1), items - 1
3833
3834void
3835schedule (...)
3836 CODE:
3837 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3838
3839void
3840schedule_to (...)
3841 CODE:
3842 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3843
3844void
3845cede_to (...)
3846 CODE:
3847 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3848
3849void
3850cede (...)
3851 CODE:
3852 CORO_EXECUTE_SLF_XS (slf_init_cede);
3853
3854void
3855cede_notself (...)
3856 CODE:
3857 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1214 3858
1215void 3859void
1216_set_current (SV *current) 3860_set_current (SV *current)
1217 PROTOTYPE: $ 3861 PROTOTYPE: $
1218 CODE: 3862 CODE:
1219 SvREFCNT_dec (SvRV (coro_current)); 3863 SvREFCNT_dec (SvRV (coro_current));
1220 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3864 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3865
3866void
3867_set_readyhook (SV *hook)
3868 PROTOTYPE: $
3869 CODE:
3870 SvREFCNT_dec (coro_readyhook);
3871 SvGETMAGIC (hook);
3872 if (SvOK (hook))
3873 {
3874 coro_readyhook = newSVsv (hook);
3875 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3876 }
3877 else
3878 {
3879 coro_readyhook = 0;
3880 CORO_READYHOOK = 0;
3881 }
1221 3882
1222int 3883int
1223prio (Coro::State coro, int newprio = 0) 3884prio (Coro::State coro, int newprio = 0)
3885 PROTOTYPE: $;$
1224 ALIAS: 3886 ALIAS:
1225 nice = 1 3887 nice = 1
1226 CODE: 3888 CODE:
1227{ 3889{
1228 RETVAL = coro->prio; 3890 RETVAL = coro->prio;
… …
1230 if (items > 1) 3892 if (items > 1)
1231 { 3893 {
1232 if (ix) 3894 if (ix)
1233 newprio = coro->prio - newprio; 3895 newprio = coro->prio - newprio;
1234 3896
1235 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3897 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1236 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3898 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1237 3899
1238 coro->prio = newprio; 3900 coro->prio = newprio;
1239 } 3901 }
1240} 3902}
3903 OUTPUT:
3904 RETVAL
1241 3905
1242SV * 3906SV *
1243ready (SV *self) 3907ready (SV *self)
1244 PROTOTYPE: $ 3908 PROTOTYPE: $
1245 CODE: 3909 CODE:
1246 RETVAL = boolSV (api_ready (self)); 3910 RETVAL = boolSV (api_ready (aTHX_ self));
1247 OUTPUT:
1248 RETVAL
1249
1250SV *
1251is_ready (SV *self)
1252 PROTOTYPE: $
1253 CODE:
1254 RETVAL = boolSV (api_is_ready (self));
1255 OUTPUT: 3911 OUTPUT:
1256 RETVAL 3912 RETVAL
1257 3913
1258int 3914int
1259nready (...) 3915nready (...)
… …
1261 CODE: 3917 CODE:
1262 RETVAL = coro_nready; 3918 RETVAL = coro_nready;
1263 OUTPUT: 3919 OUTPUT:
1264 RETVAL 3920 RETVAL
1265 3921
1266MODULE = Coro::State PACKAGE = Coro::AIO 3922void
3923suspend (Coro::State self)
3924 PROTOTYPE: $
3925 CODE:
3926 self->flags |= CF_SUSPENDED;
3927
3928void
3929resume (Coro::State self)
3930 PROTOTYPE: $
3931 CODE:
3932 self->flags &= ~CF_SUSPENDED;
3933
3934void
3935_pool_handler (...)
3936 CODE:
3937 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3938
3939void
3940async_pool (SV *cv, ...)
3941 PROTOTYPE: &@
3942 PPCODE:
3943{
3944 HV *hv = (HV *)av_pop (av_async_pool);
3945 AV *av = newAV ();
3946 SV *cb = ST (0);
3947 int i;
3948
3949 av_extend (av, items - 2);
3950 for (i = 1; i < items; ++i)
3951 av_push (av, SvREFCNT_inc_NN (ST (i)));
3952
3953 if ((SV *)hv == &PL_sv_undef)
3954 {
3955 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3956 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3957 SvREFCNT_dec (sv);
3958 }
3959
3960 {
3961 struct coro *coro = SvSTATE_hv (hv);
3962
3963 assert (!coro->invoke_cb);
3964 assert (!coro->invoke_av);
3965 coro->invoke_cb = SvREFCNT_inc (cb);
3966 coro->invoke_av = av;
3967 }
3968
3969 api_ready (aTHX_ (SV *)hv);
3970
3971 if (GIMME_V != G_VOID)
3972 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3973 else
3974 SvREFCNT_dec (hv);
3975}
1267 3976
1268SV * 3977SV *
1269_get_state () 3978rouse_cb ()
3979 PROTOTYPE:
1270 CODE: 3980 CODE:
1271{ 3981 RETVAL = coro_new_rouse_cb (aTHX);
1272 struct io_state *data;
1273
1274 RETVAL = newSV (sizeof (struct io_state));
1275 data = (struct io_state *)SvPVX (RETVAL);
1276 SvCUR_set (RETVAL, sizeof (struct io_state));
1277 SvPOK_only (RETVAL);
1278
1279 data->errorno = errno;
1280 data->laststype = PL_laststype;
1281 data->laststatval = PL_laststatval;
1282 data->statcache = PL_statcache;
1283}
1284 OUTPUT: 3982 OUTPUT:
1285 RETVAL 3983 RETVAL
1286 3984
1287void 3985void
1288_set_state (char *data_) 3986rouse_wait (...)
3987 PROTOTYPE: ;$
3988 PPCODE:
3989 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3990
3991void
3992on_enter (SV *block)
3993 ALIAS:
3994 on_leave = 1
1289 PROTOTYPE: $ 3995 PROTOTYPE: &
1290 CODE: 3996 CODE:
1291{ 3997{
1292 struct io_state *data = (void *)data_; 3998 struct coro *coro = SvSTATE_current;
3999 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1293 4000
1294 errno = data->errorno; 4001 block = s_get_cv_croak (block);
1295 PL_laststype = data->laststype;
1296 PL_laststatval = data->laststatval;
1297 PL_statcache = data->statcache;
1298}
1299 4002
4003 if (!*avp)
4004 *avp = newAV ();
4005
4006 av_push (*avp, SvREFCNT_inc (block));
4007
4008 if (!ix)
4009 on_enterleave_call (aTHX_ block);
4010
4011 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4012 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4013 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4014}
4015
4016
4017MODULE = Coro::State PACKAGE = PerlIO::cede
4018
4019BOOT:
4020 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4021
4022
4023MODULE = Coro::State PACKAGE = Coro::Semaphore
4024
4025SV *
4026new (SV *klass, SV *count = 0)
4027 CODE:
4028{
4029 int semcnt = 1;
4030
4031 if (count)
4032 {
4033 SvGETMAGIC (count);
4034
4035 if (SvOK (count))
4036 semcnt = SvIV (count);
4037 }
4038
4039 RETVAL = sv_bless (
4040 coro_waitarray_new (aTHX_ semcnt),
4041 GvSTASH (CvGV (cv))
4042 );
4043}
4044 OUTPUT:
4045 RETVAL
4046
4047# helper for Coro::Channel and others
4048SV *
4049_alloc (int count)
4050 CODE:
4051 RETVAL = coro_waitarray_new (aTHX_ count);
4052 OUTPUT:
4053 RETVAL
4054
4055SV *
4056count (SV *self)
4057 CODE:
4058 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4059 OUTPUT:
4060 RETVAL
4061
4062void
4063up (SV *self, int adjust = 1)
4064 ALIAS:
4065 adjust = 1
4066 CODE:
4067 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4068
4069void
4070down (...)
4071 CODE:
4072 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4073
4074void
4075wait (...)
4076 CODE:
4077 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4078
4079void
4080try (SV *self)
4081 PPCODE:
4082{
4083 AV *av = (AV *)SvRV (self);
4084 SV *count_sv = AvARRAY (av)[0];
4085 IV count = SvIVX (count_sv);
4086
4087 if (count > 0)
4088 {
4089 --count;
4090 SvIVX (count_sv) = count;
4091 XSRETURN_YES;
4092 }
4093 else
4094 XSRETURN_NO;
4095}
4096
4097void
4098waiters (SV *self)
4099 PPCODE:
4100{
4101 AV *av = (AV *)SvRV (self);
4102 int wcount = AvFILLp (av) + 1 - 1;
4103
4104 if (GIMME_V == G_SCALAR)
4105 XPUSHs (sv_2mortal (newSViv (wcount)));
4106 else
4107 {
4108 int i;
4109 EXTEND (SP, wcount);
4110 for (i = 1; i <= wcount; ++i)
4111 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4112 }
4113}
4114
4115MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4116
4117void
4118_may_delete (SV *sem, int count, unsigned int extra_refs)
4119 PPCODE:
4120{
4121 AV *av = (AV *)SvRV (sem);
4122
4123 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4124 && AvFILLp (av) == 0 /* no waiters, just count */
4125 && SvIV (AvARRAY (av)[0]) == count)
4126 XSRETURN_YES;
4127
4128 XSRETURN_NO;
4129}
4130
4131MODULE = Coro::State PACKAGE = Coro::Signal
4132
4133SV *
4134new (SV *klass)
4135 CODE:
4136 RETVAL = sv_bless (
4137 coro_waitarray_new (aTHX_ 0),
4138 GvSTASH (CvGV (cv))
4139 );
4140 OUTPUT:
4141 RETVAL
4142
4143void
4144wait (...)
4145 CODE:
4146 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4147
4148void
4149broadcast (SV *self)
4150 CODE:
4151{
4152 AV *av = (AV *)SvRV (self);
4153 coro_signal_wake (aTHX_ av, AvFILLp (av));
4154}
4155
4156void
4157send (SV *self)
4158 CODE:
4159{
4160 AV *av = (AV *)SvRV (self);
4161
4162 if (AvFILLp (av))
4163 coro_signal_wake (aTHX_ av, 1);
4164 else
4165 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4166}
4167
4168IV
4169awaited (SV *self)
4170 CODE:
4171 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4172 OUTPUT:
4173 RETVAL
4174
4175
4176MODULE = Coro::State PACKAGE = Coro::AnyEvent
4177
4178BOOT:
4179 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4180
4181void
4182_schedule (...)
4183 CODE:
4184{
4185 static int incede;
4186
4187 api_cede_notself (aTHX);
4188
4189 ++incede;
4190 while (coro_nready >= incede && api_cede (aTHX))
4191 ;
4192
4193 sv_setsv (sv_activity, &PL_sv_undef);
4194 if (coro_nready >= incede)
4195 {
4196 PUSHMARK (SP);
4197 PUTBACK;
4198 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4199 }
4200
4201 --incede;
4202}
4203
4204
4205MODULE = Coro::State PACKAGE = Coro::AIO
4206
4207void
4208_register (char *target, char *proto, SV *req)
4209 CODE:
4210{
4211 SV *req_cv = s_get_cv_croak (req);
4212 /* newXSproto doesn't return the CV on 5.8 */
4213 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4214 sv_setpv ((SV *)slf_cv, proto);
4215 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4216}
4217
4218MODULE = Coro::State PACKAGE = Coro::Select
4219
4220void
4221patch_pp_sselect ()
4222 CODE:
4223 if (!coro_old_pp_sselect)
4224 {
4225 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4226 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4227 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4228 }
4229
4230void
4231unpatch_pp_sselect ()
4232 CODE:
4233 if (coro_old_pp_sselect)
4234 {
4235 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4236 coro_old_pp_sselect = 0;
4237 }
4238
4239MODULE = Coro::State PACKAGE = Coro::Util
4240
4241void
4242_exit (int code)
4243 CODE:
4244 _exit (code);
4245
4246NV
4247time ()
4248 CODE:
4249 RETVAL = nvtime (aTHX);
4250 OUTPUT:
4251 RETVAL
4252
4253NV
4254gettimeofday ()
4255 PPCODE:
4256{
4257 UV tv [2];
4258 u2time (aTHX_ tv);
4259 EXTEND (SP, 2);
4260 PUSHs (sv_2mortal (newSVuv (tv [0])));
4261 PUSHs (sv_2mortal (newSVuv (tv [1])));
4262}
4263

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