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Comparing Coro/Coro/State.xs (file contents):
Revision 1.195 by root, Sat Oct 6 00:35:41 2007 UTC vs.
Revision 1.409 by root, Sun Jun 12 04:29:15 2011 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1
5
1#include "libcoro/coro.c" 6#include "libcoro/coro.c"
2 7
3#define PERL_NO_GET_CONTEXT 8#define PERL_NO_GET_CONTEXT
9#define PERL_EXT
4 10
5#include "EXTERN.h" 11#include "EXTERN.h"
6#include "perl.h" 12#include "perl.h"
7#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
8 15
9#include "patchlevel.h" 16#include "schmorp.h"
17#include "ecb.h"
10 18
19#include <stddef.h>
11#include <stdio.h> 20#include <stdio.h>
12#include <errno.h> 21#include <errno.h>
13#include <assert.h> 22#include <assert.h>
23
24#ifndef SVs_PADSTALE
25# define SVs_PADSTALE 0
26#endif
27
28#if defined(_WIN32)
29# undef HAS_GETTIMEOFDAY
30# undef setjmp
31# undef longjmp
32# undef _exit
33# define setjmp _setjmp /* deep magic */
34#else
35# include <inttypes.h> /* most portable stdint.h */
36#endif
14 37
15#ifdef HAVE_MMAP 38#ifdef HAVE_MMAP
16# include <unistd.h> 39# include <unistd.h>
17# include <sys/mman.h> 40# include <sys/mman.h>
18# ifndef MAP_ANONYMOUS 41# ifndef MAP_ANONYMOUS
… …
35# define BOOT_PAGESIZE (void)0 58# define BOOT_PAGESIZE (void)0
36#endif 59#endif
37 60
38#if CORO_USE_VALGRIND 61#if CORO_USE_VALGRIND
39# include <valgrind/valgrind.h> 62# include <valgrind/valgrind.h>
40# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
41#else
42# define REGISTER_STACK(cctx,start,end)
43#endif 63#endif
44 64
45/* the maximum number of idle cctx that will be pooled */ 65/* the maximum number of idle cctx that will be pooled */
46#define MAX_IDLE_CCTX 8 66static int cctx_max_idle = 4;
47
48#define PERL_VERSION_ATLEAST(a,b,c) \
49 (PERL_REVISION > (a) \
50 || (PERL_REVISION == (a) \
51 && (PERL_VERSION > (b) \
52 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
53
54#if !PERL_VERSION_ATLEAST (5,6,0)
55# ifndef PL_ppaddr
56# define PL_ppaddr ppaddr
57# endif
58# ifndef call_sv
59# define call_sv perl_call_sv
60# endif
61# ifndef get_sv
62# define get_sv perl_get_sv
63# endif
64# ifndef get_cv
65# define get_cv perl_get_cv
66# endif
67# ifndef IS_PADGV
68# define IS_PADGV(v) 0
69# endif
70# ifndef IS_PADCONST
71# define IS_PADCONST(v) 0
72# endif
73#endif
74
75/* 5.8.7 */
76#ifndef SvRV_set
77# define SvRV_set(s,v) SvRV(s) = (v)
78#endif
79
80/* 5.8.8 */
81#ifndef GV_NOTQUAL
82# define GV_NOTQUAL 0
83#endif
84#ifndef newSV
85# define newSV(l) NEWSV(0,l)
86#endif
87 67
88#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 68#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
89# undef CORO_STACKGUARD 69# undef CORO_STACKGUARD
90#endif 70#endif
91 71
… …
98# define CORO_PREFER_PERL_FUNCTIONS 0 78# define CORO_PREFER_PERL_FUNCTIONS 0
99#endif 79#endif
100 80
101/* The next macros try to return the current stack pointer, in an as 81/* The next macros try to return the current stack pointer, in an as
102 * portable way as possible. */ 82 * portable way as possible. */
103#define dSTACKLEVEL volatile char stacklevel
104#define STACKLEVEL ((void *)&stacklevel)
105
106#define IN_DESTRUCT (PL_main_cv == Nullcv)
107
108#if __GNUC__ >= 3 83#if __GNUC__ >= 4
109# define attribute(x) __attribute__(x) 84# define dSTACKLEVEL int stacklevel_dummy
110# define BARRIER __asm__ __volatile__ ("" : : : "memory") 85# define STACKLEVEL __builtin_frame_address (0)
111# define expect(expr,value) __builtin_expect ((expr),(value))
112#else 86#else
113# define attribute(x) 87# define dSTACKLEVEL volatile void *stacklevel
114# define BARRIER 88# define STACKLEVEL ((void *)&stacklevel)
115# define expect(expr,value) (expr)
116#endif 89#endif
117 90
118#define expect_false(expr) expect ((expr) != 0, 0) 91#define IN_DESTRUCT PL_dirty
119#define expect_true(expr) expect ((expr) != 0, 1)
120
121#define NOINLINE attribute ((noinline))
122 92
123#include "CoroAPI.h" 93#include "CoroAPI.h"
94#define GCoroAPI (&coroapi) /* very sneaky */
124 95
125#ifdef USE_ITHREADS 96#ifdef USE_ITHREADS
126static perl_mutex coro_mutex; 97# if CORO_PTHREAD
127# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 98static void *coro_thx;
128# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 99# endif
129#else
130# define LOCK (void)0
131# define UNLOCK (void)0
132#endif 100#endif
133 101
134/* helper storage struct for Coro::AIO */ 102/* used in state.h */
135struct io_state 103#define VAR(name,type) VARx(name, PL_ ## name, type)
136{
137 int errorno;
138 I32 laststype;
139 int laststatval;
140 Stat_t statcache;
141};
142 104
105#ifdef __linux
106# include <time.h> /* for timespec */
107# include <syscall.h> /* for SYS_* */
108# ifdef SYS_clock_gettime
109# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
110# define CORO_CLOCK_MONOTONIC 1
111# define CORO_CLOCK_THREAD_CPUTIME_ID 3
112# endif
113#endif
114
115static double (*nvtime)(); /* so why doesn't it take void? */
116static void (*u2time)(pTHX_ UV ret[2]);
117
118/* we hijack an hopefully unused CV flag for our purposes */
119#define CVf_SLF 0x4000
120static OP *pp_slf (pTHX);
121static void slf_destroy (pTHX_ struct coro *coro);
122
123static U32 cctx_gen;
143static size_t coro_stacksize = CORO_STACKSIZE; 124static size_t cctx_stacksize = CORO_STACKSIZE;
144static struct CoroAPI coroapi; 125static struct CoroAPI coroapi;
145static AV *main_mainstack; /* used to differentiate between $main and others */ 126static AV *main_mainstack; /* used to differentiate between $main and others */
146static JMPENV *main_top_env; 127static JMPENV *main_top_env;
147static HV *coro_state_stash, *coro_stash; 128static HV *coro_state_stash, *coro_stash;
148static SV *coro_mortal; /* will be freed after next transfer */ 129static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
130
131static AV *av_destroy; /* destruction queue */
132static SV *sv_manager; /* the manager coro */
133static SV *sv_idle; /* $Coro::idle */
149 134
150static GV *irsgv; /* $/ */ 135static GV *irsgv; /* $/ */
151static GV *stdoutgv; /* *STDOUT */ 136static GV *stdoutgv; /* *STDOUT */
137static SV *rv_diehook;
138static SV *rv_warnhook;
139static HV *hv_sig; /* %SIG */
152 140
153/* async_pool helper stuff */ 141/* async_pool helper stuff */
154static SV *sv_pool_rss; 142static SV *sv_pool_rss;
155static SV *sv_pool_size; 143static SV *sv_pool_size;
144static SV *sv_async_pool_idle; /* description string */
156static AV *av_async_pool; 145static AV *av_async_pool; /* idle pool */
146static SV *sv_Coro; /* class string */
147static CV *cv_pool_handler;
148
149/* Coro::AnyEvent */
150static SV *sv_activity;
151
152/* enable processtime/realtime profiling */
153static char enable_times;
154typedef U32 coro_ts[2];
155static coro_ts time_real, time_cpu;
156static char times_valid;
157 157
158static struct coro_cctx *cctx_first; 158static struct coro_cctx *cctx_first;
159static int cctx_count, cctx_idle; 159static int cctx_count, cctx_idle;
160 160
161enum { 161enum
162{
162 CC_MAPPED = 0x01, 163 CC_MAPPED = 0x01,
163 CC_NOREUSE = 0x02, /* throw this away after tracing */ 164 CC_NOREUSE = 0x02, /* throw this away after tracing */
164 CC_TRACE = 0x04, 165 CC_TRACE = 0x04,
165 CC_TRACE_SUB = 0x08, /* trace sub calls */ 166 CC_TRACE_SUB = 0x08, /* trace sub calls */
166 CC_TRACE_LINE = 0x10, /* trace each statement */ 167 CC_TRACE_LINE = 0x10, /* trace each statement */
167 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 168 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
168}; 169};
169 170
170/* this is a structure representing a c-level coroutine */ 171/* this is a structure representing a c-level coroutine */
171typedef struct coro_cctx { 172typedef struct coro_cctx
173{
172 struct coro_cctx *next; 174 struct coro_cctx *next;
173 175
174 /* the stack */ 176 /* the stack */
175 void *sptr; 177 void *sptr;
176 size_t ssize; 178 size_t ssize;
… …
179 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 181 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
180 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 182 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
181 JMPENV *top_env; 183 JMPENV *top_env;
182 coro_context cctx; 184 coro_context cctx;
183 185
186 U32 gen;
184#if CORO_USE_VALGRIND 187#if CORO_USE_VALGRIND
185 int valgrind_id; 188 int valgrind_id;
186#endif 189#endif
187 unsigned char flags; 190 unsigned char flags;
188} coro_cctx; 191} coro_cctx;
189 192
193static coro_cctx *cctx_current; /* the currently running cctx */
194
195/*****************************************************************************/
196
197static MGVTBL coro_state_vtbl;
198
190enum { 199enum
200{
191 CF_RUNNING = 0x0001, /* coroutine is running */ 201 CF_RUNNING = 0x0001, /* coroutine is running */
192 CF_READY = 0x0002, /* coroutine is ready */ 202 CF_READY = 0x0002, /* coroutine is ready */
193 CF_NEW = 0x0004, /* has never been switched to */ 203 CF_NEW = 0x0004, /* has never been switched to */
194 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 204 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
205 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
206 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
195}; 207};
196 208
209/* the structure where most of the perl state is stored, overlaid on the cxstack */
210typedef struct
211{
212#define VARx(name,expr,type) type name;
213# include "state.h"
214#undef VARx
215} perl_slots;
216
217// how many context stack entries do we need for perl_slots
218#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
219
197/* this is a structure representing a perl-level coroutine */ 220/* this is a structure representing a perl-level coroutine */
198struct coro { 221struct coro
222{
199 /* the c coroutine allocated to this perl coroutine, if any */ 223 /* the C coroutine allocated to this perl coroutine, if any */
200 coro_cctx *cctx; 224 coro_cctx *cctx;
201 225
226 /* ready queue */
227 struct coro *next_ready;
228
229 /* state data */
230 struct CoroSLF slf_frame; /* saved slf frame */
231 AV *mainstack;
232 perl_slots *slot; /* basically the saved sp */
233
234 CV *startcv; /* the CV to execute */
202 /* data associated with this coroutine (initial args) */ 235 AV *args; /* data associated with this coroutine (initial args) */
203 AV *args;
204 int refcnt;
205 int flags; /* CF_ flags */ 236 int flags; /* CF_ flags */
206 237 HV *hv; /* the perl hash associated with this coro, if any */
207 /* optionally saved, might be zero */
208 AV *defav; /* @_ */
209 SV *defsv; /* $_ */
210 SV *errsv; /* $@ */
211 SV *deffh; /* default filehandle */
212 SV *irssv; /* $/ */
213 SV *irssv_sv; /* real $/ cache */
214
215#define VAR(name,type) type name;
216# include "state.h"
217#undef VAR
218 238
219 /* statistics */ 239 /* statistics */
220 int usecount; /* number of transfers to this coro */ 240 int usecount; /* number of transfers to this coro */
221 241
222 /* coro process data */ 242 /* coro process data */
223 int prio; 243 int prio;
224 //SV *throw; 244 SV *except; /* exception to be thrown */
245 SV *rouse_cb; /* last rouse callback */
246 AV *on_destroy; /* callbacks or coros to notify on destroy */
247 AV *status; /* the exit status list */
225 248
226 /* async_pool */ 249 /* async_pool */
227 SV *saved_deffh; 250 SV *saved_deffh;
251 SV *invoke_cb;
252 AV *invoke_av;
253
254 /* on_enter/on_leave */
255 AV *on_enter;
256 AV *on_leave;
257
258 /* swap_sv */
259 AV *swap_sv;
260
261 /* times */
262 coro_ts t_cpu, t_real;
228 263
229 /* linked list */ 264 /* linked list */
230 struct coro *next, *prev; 265 struct coro *next, *prev;
231 HV *hv; /* the perl hash associated with this coro, if any */
232}; 266};
233 267
234typedef struct coro *Coro__State; 268typedef struct coro *Coro__State;
235typedef struct coro *Coro__State_or_hashref; 269typedef struct coro *Coro__State_or_hashref;
236 270
271/* the following variables are effectively part of the perl context */
272/* and get copied between struct coro and these variables */
273/* the main reason we don't support windows process emulation */
274static struct CoroSLF slf_frame; /* the current slf frame */
275
237/** Coro ********************************************************************/ 276/** Coro ********************************************************************/
238 277
239#define PRIO_MAX 3 278#define CORO_PRIO_MAX 3
240#define PRIO_HIGH 1 279#define CORO_PRIO_HIGH 1
241#define PRIO_NORMAL 0 280#define CORO_PRIO_NORMAL 0
242#define PRIO_LOW -1 281#define CORO_PRIO_LOW -1
243#define PRIO_IDLE -3 282#define CORO_PRIO_IDLE -3
244#define PRIO_MIN -4 283#define CORO_PRIO_MIN -4
245 284
246/* for Coro.pm */ 285/* for Coro.pm */
247static SV *coro_current; 286static SV *coro_current;
248static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 287static SV *coro_readyhook;
249static int coro_nready; 288static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
289static CV *cv_coro_run;
250static struct coro *coro_first; 290static struct coro *coro_first;
291#define coro_nready coroapi.nready
292
293/** JIT *********************************************************************/
294
295#if CORO_JIT
296 #ifndef CORO_JIT_TYPE
297 #if __x86_64 && (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris)
298 #define CORO_JIT_TYPE "amd64-unix"
299 typedef void (*load_save_perl_slots_type)(perl_slots *);
300 #elif __i386 && (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris)
301 #define CORO_JIT_TYPE "x86-unix"
302 typedef void (*load_save_perl_slots_type)(perl_slots *);
303 #else
304 x x x x
305 #undef CORO_JIT
306 #endif
307 #endif
308#endif
309
310#if CORO_JIT
311static load_save_perl_slots_type load_perl_slots, save_perl_slots;
312#endif
313
314/** Coro::Select ************************************************************/
315
316static OP *(*coro_old_pp_sselect) (pTHX);
317static SV *coro_select_select;
318
319/* horrible hack, but if it works... */
320static OP *
321coro_pp_sselect (pTHX)
322{
323 dSP;
324 PUSHMARK (SP - 4); /* fake argument list */
325 XPUSHs (coro_select_select);
326 PUTBACK;
327
328 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
329 PL_op->op_flags |= OPf_STACKED;
330 PL_op->op_private = 0;
331 return PL_ppaddr [OP_ENTERSUB](aTHX);
332}
333
334/** time stuff **************************************************************/
335
336#ifdef HAS_GETTIMEOFDAY
337
338ECB_INLINE void
339coro_u2time (pTHX_ UV ret[2])
340{
341 struct timeval tv;
342 gettimeofday (&tv, 0);
343
344 ret [0] = tv.tv_sec;
345 ret [1] = tv.tv_usec;
346}
347
348ECB_INLINE double
349coro_nvtime ()
350{
351 struct timeval tv;
352 gettimeofday (&tv, 0);
353
354 return tv.tv_sec + tv.tv_usec * 1e-6;
355}
356
357ECB_INLINE void
358time_init (pTHX)
359{
360 nvtime = coro_nvtime;
361 u2time = coro_u2time;
362}
363
364#else
365
366ECB_INLINE void
367time_init (pTHX)
368{
369 SV **svp;
370
371 require_pv ("Time/HiRes.pm");
372
373 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
374
375 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
376 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
377
378 nvtime = INT2PTR (double (*)(), SvIV (*svp));
379
380 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
381 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
382}
383
384#endif
251 385
252/** lowlevel stuff **********************************************************/ 386/** lowlevel stuff **********************************************************/
253 387
254static AV * 388static SV * ecb_noinline
389coro_get_sv (pTHX_ const char *name, int create)
390{
391#if PERL_VERSION_ATLEAST (5,10,0)
392 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
393 get_sv (name, create);
394#endif
395 return get_sv (name, create);
396}
397
398static AV * ecb_noinline
399coro_get_av (pTHX_ const char *name, int create)
400{
401#if PERL_VERSION_ATLEAST (5,10,0)
402 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
403 get_av (name, create);
404#endif
405 return get_av (name, create);
406}
407
408static HV * ecb_noinline
409coro_get_hv (pTHX_ const char *name, int create)
410{
411#if PERL_VERSION_ATLEAST (5,10,0)
412 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
413 get_hv (name, create);
414#endif
415 return get_hv (name, create);
416}
417
418ECB_INLINE void
419coro_times_update ()
420{
421#ifdef coro_clock_gettime
422 struct timespec ts;
423
424 ts.tv_sec = ts.tv_nsec = 0;
425 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
426 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
427
428 ts.tv_sec = ts.tv_nsec = 0;
429 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
430 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
431#else
432 dTHX;
433 UV tv[2];
434
435 u2time (aTHX_ tv);
436 time_real [0] = tv [0];
437 time_real [1] = tv [1] * 1000;
438#endif
439}
440
441ECB_INLINE void
442coro_times_add (struct coro *c)
443{
444 c->t_real [1] += time_real [1];
445 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
446 c->t_real [0] += time_real [0];
447
448 c->t_cpu [1] += time_cpu [1];
449 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
450 c->t_cpu [0] += time_cpu [0];
451}
452
453ECB_INLINE void
454coro_times_sub (struct coro *c)
455{
456 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
457 c->t_real [1] -= time_real [1];
458 c->t_real [0] -= time_real [0];
459
460 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
461 c->t_cpu [1] -= time_cpu [1];
462 c->t_cpu [0] -= time_cpu [0];
463}
464
465/*****************************************************************************/
466/* magic glue */
467
468#define CORO_MAGIC_type_cv 26
469#define CORO_MAGIC_type_state PERL_MAGIC_ext
470
471#define CORO_MAGIC_NN(sv, type) \
472 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
473 ? SvMAGIC (sv) \
474 : mg_find (sv, type))
475
476#define CORO_MAGIC(sv, type) \
477 (ecb_expect_true (SvMAGIC (sv)) \
478 ? CORO_MAGIC_NN (sv, type) \
479 : 0)
480
481#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
482#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
483
484ECB_INLINE MAGIC *
485SvSTATEhv_p (pTHX_ SV *coro)
486{
487 MAGIC *mg;
488
489 if (ecb_expect_true (
490 SvTYPE (coro) == SVt_PVHV
491 && (mg = CORO_MAGIC_state (coro))
492 && mg->mg_virtual == &coro_state_vtbl
493 ))
494 return mg;
495
496 return 0;
497}
498
499ECB_INLINE struct coro *
500SvSTATE_ (pTHX_ SV *coro)
501{
502 MAGIC *mg;
503
504 if (SvROK (coro))
505 coro = SvRV (coro);
506
507 mg = SvSTATEhv_p (aTHX_ coro);
508 if (!mg)
509 croak ("Coro::State object required");
510
511 return (struct coro *)mg->mg_ptr;
512}
513
514#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
515
516/* faster than SvSTATE, but expects a coroutine hv */
517#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
518#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
519
520/*****************************************************************************/
521/* padlist management and caching */
522
523ECB_INLINE AV *
255coro_clone_padlist (pTHX_ CV *cv) 524coro_derive_padlist (pTHX_ CV *cv)
256{ 525{
257 AV *padlist = CvPADLIST (cv); 526 AV *padlist = CvPADLIST (cv);
258 AV *newpadlist, *newpad; 527 AV *newpadlist, *newpad;
259 528
260 newpadlist = newAV (); 529 newpadlist = newAV ();
261 AvREAL_off (newpadlist); 530 AvREAL_off (newpadlist);
262#if PERL_VERSION_ATLEAST (5,9,0) 531#if PERL_VERSION_ATLEAST (5,10,0)
263 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 532 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
264#else 533#else
265 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 534 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
266#endif 535#endif
267 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 536 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
268 --AvFILLp (padlist); 537 --AvFILLp (padlist);
269 538
270 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 539 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
271 av_store (newpadlist, 1, (SV *)newpad); 540 av_store (newpadlist, 1, (SV *)newpad);
272 541
273 return newpadlist; 542 return newpadlist;
274} 543}
275 544
276static void 545ECB_INLINE void
277free_padlist (pTHX_ AV *padlist) 546free_padlist (pTHX_ AV *padlist)
278{ 547{
279 /* may be during global destruction */ 548 /* may be during global destruction */
280 if (SvREFCNT (padlist)) 549 if (!IN_DESTRUCT)
281 { 550 {
282 I32 i = AvFILLp (padlist); 551 I32 i = AvFILLp (padlist);
283 while (i >= 0) 552
553 while (i > 0) /* special-case index 0 */
284 { 554 {
285 SV **svp = av_fetch (padlist, i--, FALSE); 555 /* we try to be extra-careful here */
286 if (svp) 556 AV *av = (AV *)AvARRAY (padlist)[i--];
287 { 557 I32 j = AvFILLp (av);
288 SV *sv; 558
289 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 559 while (j >= 0)
560 SvREFCNT_dec (AvARRAY (av)[j--]);
561
562 AvFILLp (av) = -1;
290 SvREFCNT_dec (sv); 563 SvREFCNT_dec (av);
291
292 SvREFCNT_dec (*svp);
293 }
294 } 564 }
295 565
566 SvREFCNT_dec (AvARRAY (padlist)[0]);
567
568 AvFILLp (padlist) = -1;
296 SvREFCNT_dec ((SV*)padlist); 569 SvREFCNT_dec ((SV*)padlist);
297 } 570 }
298} 571}
299 572
300static int 573static int
301coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 574coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
302{ 575{
303 AV *padlist; 576 AV *padlist;
304 AV *av = (AV *)mg->mg_obj; 577 AV *av = (AV *)mg->mg_obj;
578
579 /* perl manages to free our internal AV and _then_ call us */
580 if (IN_DESTRUCT)
581 return 0;
305 582
306 /* casting is fun. */ 583 /* casting is fun. */
307 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 584 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
308 free_padlist (aTHX_ padlist); 585 free_padlist (aTHX_ padlist);
309 586
310 SvREFCNT_dec (av); 587 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
311 588
312 return 0; 589 return 0;
313} 590}
314 591
315#define PERL_MAGIC_coro PERL_MAGIC_ext 592static MGVTBL coro_cv_vtbl = {
316 593 0, 0, 0, 0,
317static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 594 coro_cv_free
318 595};
319#define CORO_MAGIC(cv) \
320 SvMAGIC (cv) \
321 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
322 ? SvMAGIC (cv) \
323 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
324 : 0
325
326static struct coro *
327SvSTATE_ (pTHX_ SV *coro)
328{
329 HV *stash;
330 MAGIC *mg;
331
332 if (SvROK (coro))
333 coro = SvRV (coro);
334
335 if (expect_false (SvTYPE (coro) != SVt_PVHV))
336 croak ("Coro::State object required");
337
338 stash = SvSTASH (coro);
339 if (expect_false (stash != coro_stash && stash != coro_state_stash))
340 {
341 /* very slow, but rare, check */
342 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
343 croak ("Coro::State object required");
344 }
345
346 mg = CORO_MAGIC (coro);
347 return (struct coro *)mg->mg_ptr;
348}
349
350#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
351 596
352/* the next two functions merely cache the padlists */ 597/* the next two functions merely cache the padlists */
353static void 598ECB_INLINE void
354get_padlist (pTHX_ CV *cv) 599get_padlist (pTHX_ CV *cv)
355{ 600{
356 MAGIC *mg = CORO_MAGIC (cv); 601 MAGIC *mg = CORO_MAGIC_cv (cv);
357 AV *av; 602 AV *av;
358 603
359 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)) 604 if (ecb_expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
360 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 605 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
361 else 606 else
362 { 607 {
363#if CORO_PREFER_PERL_FUNCTIONS 608#if CORO_PREFER_PERL_FUNCTIONS
364 /* this is probably cleaner, but also slower? */ 609 /* this is probably cleaner? but also slower! */
610 /* in practise, it seems to be less stable */
365 CV *cp = Perl_cv_clone (cv); 611 CV *cp = Perl_cv_clone (aTHX_ cv);
366 CvPADLIST (cv) = CvPADLIST (cp); 612 CvPADLIST (cv) = CvPADLIST (cp);
367 CvPADLIST (cp) = 0; 613 CvPADLIST (cp) = 0;
368 SvREFCNT_dec (cp); 614 SvREFCNT_dec (cp);
369#else 615#else
370 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 616 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
371#endif 617#endif
372 } 618 }
373} 619}
374 620
375static void 621ECB_INLINE void
376put_padlist (pTHX_ CV *cv) 622put_padlist (pTHX_ CV *cv)
377{ 623{
378 MAGIC *mg = CORO_MAGIC (cv); 624 MAGIC *mg = CORO_MAGIC_cv (cv);
379 AV *av; 625 AV *av;
380 626
381 if (expect_false (!mg)) 627 if (ecb_expect_false (!mg))
382 { 628 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
383 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
384 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
385 mg->mg_virtual = &vtbl_coro;
386 mg->mg_obj = (SV *)newAV ();
387 }
388 629
389 av = (AV *)mg->mg_obj; 630 av = (AV *)mg->mg_obj;
390 631
391 if (expect_false (AvFILLp (av) >= AvMAX (av))) 632 if (ecb_expect_false (AvFILLp (av) >= AvMAX (av)))
392 av_extend (av, AvMAX (av) + 1); 633 av_extend (av, AvFILLp (av) + 1);
393 634
394 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 635 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
395} 636}
396 637
397/** load & save, init *******************************************************/ 638/** load & save, init *******************************************************/
398 639
640/* swap sv heads, at least logically */
641static void
642swap_svs (pTHX_ Coro__State c)
643{
644 int i;
645
646 for (i = 0; i <= AvFILLp (c->swap_sv); )
647 {
648 SV *a = AvARRAY (c->swap_sv)[i++];
649 SV *b = AvARRAY (c->swap_sv)[i++];
650
651 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
652 SV tmp;
653
654 /* swap sv_any */
655 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
656
657 /* swap sv_flags */
658 SvFLAGS (&tmp) = SvFLAGS (a);
659 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
660 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
661
662#if PERL_VERSION_ATLEAST (5,10,0)
663 /* perl 5.10 complicates this _quite_ a bit, but it also is
664 * much faster, so no quarrels here. alternatively, we could
665 * sv_upgrade to avoid this.
666 */
667 {
668 /* swap sv_u */
669 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
670
671 /* if SvANY points to the head, we need to adjust the pointers,
672 * as the pointer for a still points to b, and maybe vice versa.
673 */
674 #define svany_in_head(type) \
675 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
676
677 if (svany_in_head (SvTYPE (a)))
678 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
679
680 if (svany_in_head (SvTYPE (b)))
681 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
682 }
683#endif
684 }
685}
686
687#define SWAP_SVS(coro) \
688 if (ecb_expect_false ((coro)->swap_sv)) \
689 swap_svs (aTHX_ (coro))
690
691static void
692on_enterleave_call (pTHX_ SV *cb);
693
399static void 694static void
400load_perl (pTHX_ Coro__State c) 695load_perl (pTHX_ Coro__State c)
401{ 696{
402#define VAR(name,type) PL_ ## name = c->name; 697 perl_slots *slot = c->slot;
698 c->slot = 0;
699
700 PL_mainstack = c->mainstack;
701
702#if CORO_JIT
703 load_perl_slots (slot);
704#else
705 #define VARx(name,expr,type) expr = slot->name;
403# include "state.h" 706 # include "state.h"
404#undef VAR 707 #undef VARx
405 708#endif
406 GvSV (PL_defgv) = c->defsv;
407 GvAV (PL_defgv) = c->defav;
408 GvSV (PL_errgv) = c->errsv;
409 GvSV (irsgv) = c->irssv_sv;
410 709
411 { 710 {
412 dSP; 711 dSP;
712
413 CV *cv; 713 CV *cv;
414 714
415 /* now do the ugly restore mess */ 715 /* now do the ugly restore mess */
416 while (expect_true (cv = (CV *)POPs)) 716 while (ecb_expect_true (cv = (CV *)POPs))
417 { 717 {
418 put_padlist (aTHX_ cv); /* mark this padlist as available */ 718 put_padlist (aTHX_ cv); /* mark this padlist as available */
419 CvDEPTH (cv) = PTR2IV (POPs); 719 CvDEPTH (cv) = PTR2IV (POPs);
420 CvPADLIST (cv) = (AV *)POPs; 720 CvPADLIST (cv) = (AV *)POPs;
421 } 721 }
422 722
423 PUTBACK; 723 PUTBACK;
424 } 724 }
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);
425} 746}
426 747
427static void 748static void
428save_perl (pTHX_ Coro__State c) 749save_perl (pTHX_ Coro__State c)
429{ 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
430 { 772 {
431 dSP; 773 dSP;
432 I32 cxix = cxstack_ix; 774 I32 cxix = cxstack_ix;
433 PERL_CONTEXT *ccstk = cxstack; 775 PERL_CONTEXT *ccstk = cxstack;
434 PERL_SI *top_si = PL_curstackinfo; 776 PERL_SI *top_si = PL_curstackinfo;
… …
440 782
441 XPUSHs (Nullsv); 783 XPUSHs (Nullsv);
442 /* this loop was inspired by pp_caller */ 784 /* this loop was inspired by pp_caller */
443 for (;;) 785 for (;;)
444 { 786 {
445 while (expect_true (cxix >= 0)) 787 while (ecb_expect_true (cxix >= 0))
446 { 788 {
447 PERL_CONTEXT *cx = &ccstk[cxix--]; 789 PERL_CONTEXT *cx = &ccstk[cxix--];
448 790
449 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)) 791 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
450 { 792 {
451 CV *cv = cx->blk_sub.cv; 793 CV *cv = cx->blk_sub.cv;
452 794
453 if (expect_true (CvDEPTH (cv))) 795 if (ecb_expect_true (CvDEPTH (cv)))
454 { 796 {
455 EXTEND (SP, 3); 797 EXTEND (SP, 3);
456 PUSHs ((SV *)CvPADLIST (cv)); 798 PUSHs ((SV *)CvPADLIST (cv));
457 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 799 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
458 PUSHs ((SV *)cv); 800 PUSHs ((SV *)cv);
459 801
460 CvDEPTH (cv) = 0; 802 CvDEPTH (cv) = 0;
461 get_padlist (aTHX_ cv); 803 get_padlist (aTHX_ cv);
462 } 804 }
463 } 805 }
464 } 806 }
465 807
466 if (expect_true (top_si->si_type == PERLSI_MAIN)) 808 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
467 break; 809 break;
468 810
469 top_si = top_si->si_prev; 811 top_si = top_si->si_prev;
470 ccstk = top_si->si_cxstack; 812 ccstk = top_si->si_cxstack;
471 cxix = top_si->si_cxix; 813 cxix = top_si->si_cxix;
472 } 814 }
473 815
474 PUTBACK; 816 PUTBACK;
475 } 817 }
476 818
477 c->defav = GvAV (PL_defgv); 819 /* allocate some space on the context stack for our purposes */
478 c->defsv = DEFSV; 820 if (ecb_expect_false (cxstack_ix + SLOT_COUNT >= cxstack_max))
479 c->errsv = ERRSV; 821 {
480 c->irssv_sv = GvSV (irsgv); 822 unsigned int i;
481 823
482#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;
483# include "state.h" 839 # include "state.h"
484#undef VAR 840 #undef VARx
841#endif
842 }
485} 843}
486 844
487/* 845/*
488 * allocate various perl stacks. This is an exact copy 846 * allocate various perl stacks. This is almost an exact copy
489 * of perl.c:init_stacks, except that it uses less memory 847 * of perl.c:init_stacks, except that it uses less memory
490 * on the (sometimes correct) assumption that coroutines do 848 * on the (sometimes correct) assumption that coroutines do
491 * not usually need a lot of stackspace. 849 * not usually need a lot of stackspace.
492 */ 850 */
493#if CORO_PREFER_PERL_FUNCTIONS 851#if CORO_PREFER_PERL_FUNCTIONS
494# define coro_init_stacks init_stacks 852# define coro_init_stacks(thx) init_stacks ()
495#else 853#else
496static void 854static void
497coro_init_stacks (pTHX) 855coro_init_stacks (pTHX)
498{ 856{
499 PL_curstackinfo = new_stackinfo(64, 6); 857 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
500 PL_curstackinfo->si_type = PERLSI_MAIN; 858 PL_curstackinfo->si_type = PERLSI_MAIN;
501 PL_curstack = PL_curstackinfo->si_stack; 859 PL_curstack = PL_curstackinfo->si_stack;
502 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 860 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
503 861
504 PL_stack_base = AvARRAY(PL_curstack); 862 PL_stack_base = AvARRAY(PL_curstack);
505 PL_stack_sp = PL_stack_base; 863 PL_stack_sp = PL_stack_base;
506 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 864 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
507 865
508 New(50,PL_tmps_stack,64,SV*); 866 New(50,PL_tmps_stack,32,SV*);
509 PL_tmps_floor = -1; 867 PL_tmps_floor = -1;
510 PL_tmps_ix = -1; 868 PL_tmps_ix = -1;
511 PL_tmps_max = 64; 869 PL_tmps_max = 32;
512 870
513 New(54,PL_markstack,16,I32); 871 New(54,PL_markstack,16,I32);
514 PL_markstack_ptr = PL_markstack; 872 PL_markstack_ptr = PL_markstack;
515 PL_markstack_max = PL_markstack + 16; 873 PL_markstack_max = PL_markstack + 16;
516 874
517#ifdef SET_MARK_OFFSET 875#ifdef SET_MARK_OFFSET
518 SET_MARK_OFFSET; 876 SET_MARK_OFFSET;
519#endif 877#endif
520 878
521 New(54,PL_scopestack,16,I32); 879 New(54,PL_scopestack,8,I32);
522 PL_scopestack_ix = 0; 880 PL_scopestack_ix = 0;
523 PL_scopestack_max = 16; 881 PL_scopestack_max = 8;
524 882
525 New(54,PL_savestack,64,ANY); 883 New(54,PL_savestack,24,ANY);
526 PL_savestack_ix = 0; 884 PL_savestack_ix = 0;
527 PL_savestack_max = 64; 885 PL_savestack_max = 24;
528 886
529#if !PERL_VERSION_ATLEAST (5,9,0) 887#if !PERL_VERSION_ATLEAST (5,10,0)
530 New(54,PL_retstack,4,OP*); 888 New(54,PL_retstack,4,OP*);
531 PL_retstack_ix = 0; 889 PL_retstack_ix = 0;
532 PL_retstack_max = 4; 890 PL_retstack_max = 4;
533#endif 891#endif
534} 892}
… …
536 894
537/* 895/*
538 * destroy the stacks, the callchain etc... 896 * destroy the stacks, the callchain etc...
539 */ 897 */
540static void 898static void
541coro_destroy_stacks (pTHX) 899coro_destruct_stacks (pTHX)
542{ 900{
543 while (PL_curstackinfo->si_next) 901 while (PL_curstackinfo->si_next)
544 PL_curstackinfo = PL_curstackinfo->si_next; 902 PL_curstackinfo = PL_curstackinfo->si_next;
545 903
546 while (PL_curstackinfo) 904 while (PL_curstackinfo)
… …
557 915
558 Safefree (PL_tmps_stack); 916 Safefree (PL_tmps_stack);
559 Safefree (PL_markstack); 917 Safefree (PL_markstack);
560 Safefree (PL_scopestack); 918 Safefree (PL_scopestack);
561 Safefree (PL_savestack); 919 Safefree (PL_savestack);
562#if !PERL_VERSION_ATLEAST (5,9,0) 920#if !PERL_VERSION_ATLEAST (5,10,0)
563 Safefree (PL_retstack); 921 Safefree (PL_retstack);
564#endif 922#endif
565} 923}
566 924
925#define CORO_RSS \
926 rss += sizeof (SYM (curstackinfo)); \
927 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
928 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
929 rss += SYM (tmps_max) * sizeof (SV *); \
930 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
931 rss += SYM (scopestack_max) * sizeof (I32); \
932 rss += SYM (savestack_max) * sizeof (ANY);
933
567static size_t 934static size_t
568coro_rss (pTHX_ struct coro *coro) 935coro_rss (pTHX_ struct coro *coro)
569{ 936{
570 size_t rss = sizeof (*coro); 937 size_t rss = sizeof (*coro);
571 938
572 if (coro->mainstack) 939 if (coro->mainstack)
573 { 940 {
574 if (coro->flags & CF_RUNNING) 941 if (coro->flags & CF_RUNNING)
575 { 942 {
576 #define VAR(name,type)coro->name = PL_ ## name; 943 #define SYM(sym) PL_ ## sym
577 # include "state.h" 944 CORO_RSS;
578 #undef VAR 945 #undef SYM
579 } 946 }
947 else
948 {
949 #define SYM(sym) coro->slot->sym
950 CORO_RSS;
951 #undef SYM
952 }
953 }
580 954
581 rss += sizeof (coro->curstackinfo); 955 return rss;
582 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *); 956}
583 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
584 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
585 rss += coro->tmps_max * sizeof (SV *);
586 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
587 rss += coro->scopestack_max * sizeof (I32);
588 rss += coro->savestack_max * sizeof (ANY);
589 957
590#if !PERL_VERSION_ATLEAST (5,9,0) 958/** coroutine stack handling ************************************************/
591 rss += coro->retstack_max * sizeof (OP *); 959
960static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
961static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
962static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
963
964/* apparently < 5.8.8 */
965#ifndef MgPV_nolen_const
966#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
967 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
968 (const char*)(mg)->mg_ptr)
592#endif 969#endif
970
971/*
972 * This overrides the default magic get method of %SIG elements.
973 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
974 * and instead of trying to save and restore the hash elements (extremely slow),
975 * we just provide our own readback here.
976 */
977static int ecb_cold
978coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
979{
980 const char *s = MgPV_nolen_const (mg);
981
982 if (*s == '_')
593 } 983 {
984 SV **svp = 0;
594 985
986 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
987 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
988
989 if (svp)
990 {
991 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
992 return 0;
993 }
994 }
995
996 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
997}
998
999static int ecb_cold
1000coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1001{
1002 const char *s = MgPV_nolen_const (mg);
1003
1004 if (*s == '_')
1005 {
1006 SV **svp = 0;
1007
1008 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1009 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1010
1011 if (svp)
1012 {
1013 SV *old = *svp;
1014 *svp = 0;
1015 SvREFCNT_dec (old);
1016 return 0;
1017 }
1018 }
1019
1020 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1021}
1022
1023static int ecb_cold
1024coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1025{
1026 const char *s = MgPV_nolen_const (mg);
1027
1028 if (*s == '_')
1029 {
1030 SV **svp = 0;
1031
1032 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1033 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1034
1035 if (svp)
1036 {
1037 SV *old = *svp;
1038 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1039 SvREFCNT_dec (old);
1040 return 0;
1041 }
1042 }
1043
1044 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1045}
1046
1047static void
1048prepare_nop (pTHX_ struct coro_transfer_args *ta)
1049{
1050 /* kind of mega-hacky, but works */
1051 ta->next = ta->prev = (struct coro *)ta;
1052}
1053
1054static int
1055slf_check_nop (pTHX_ struct CoroSLF *frame)
1056{
595 return rss; 1057 return 0;
596} 1058}
597 1059
598/** coroutine stack handling ************************************************/
599
600static void 1060static int
1061slf_check_repeat (pTHX_ struct CoroSLF *frame)
1062{
1063 return 1;
1064}
1065
1066static UNOP init_perl_op;
1067
1068ecb_noinline static void /* noinline to keep it out of the transfer fast path */
601coro_setup (pTHX_ struct coro *coro) 1069init_perl (pTHX_ struct coro *coro)
602{ 1070{
603 /* 1071 /*
604 * emulate part of the perl startup here. 1072 * emulate part of the perl startup here.
605 */ 1073 */
606 coro_init_stacks (aTHX); 1074 coro_init_stacks (aTHX);
607 1075
608 PL_runops = RUNOPS_DEFAULT; 1076 PL_runops = RUNOPS_DEFAULT;
609 PL_curcop = &PL_compiling; 1077 PL_curcop = &PL_compiling;
610 PL_in_eval = EVAL_NULL; 1078 PL_in_eval = EVAL_NULL;
611 PL_comppad = 0; 1079 PL_comppad = 0;
1080 PL_comppad_name = 0;
1081 PL_comppad_name_fill = 0;
1082 PL_comppad_name_floor = 0;
612 PL_curpm = 0; 1083 PL_curpm = 0;
613 PL_curpad = 1; 1084 PL_curpad = 0;
614 PL_localizing = 0; 1085 PL_localizing = 0;
615 PL_dirty = 0;
616 PL_restartop = 0; 1086 PL_restartop = 0;
1087#if PERL_VERSION_ATLEAST (5,10,0)
1088 PL_parser = 0;
1089#endif
1090 PL_hints = 0;
1091
1092 /* recreate the die/warn hooks */
1093 PL_diehook = SvREFCNT_inc (rv_diehook);
1094 PL_warnhook = SvREFCNT_inc (rv_warnhook);
617 1095
618 GvSV (PL_defgv) = newSV (0); 1096 GvSV (PL_defgv) = newSV (0);
619 GvAV (PL_defgv) = coro->args; coro->args = 0; 1097 GvAV (PL_defgv) = coro->args; coro->args = 0;
620 GvSV (PL_errgv) = newSV (0); 1098 GvSV (PL_errgv) = newSV (0);
621 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 1099 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1100 GvHV (PL_hintgv) = 0;
622 PL_rs = newSVsv (GvSV (irsgv)); 1101 PL_rs = newSVsv (GvSV (irsgv));
623 PL_defoutgv = SvREFCNT_inc (stdoutgv); 1102 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
624 1103
625 { 1104 {
626 dSP; 1105 dSP;
627 LOGOP myop; 1106 UNOP myop;
628 1107
629 Zero (&myop, 1, LOGOP); 1108 Zero (&myop, 1, UNOP);
630 myop.op_next = Nullop; 1109 myop.op_next = Nullop;
1110 myop.op_type = OP_ENTERSUB;
631 myop.op_flags = OPf_WANT_VOID; 1111 myop.op_flags = OPf_WANT_VOID;
632 1112
633 PUSHMARK (SP); 1113 PUSHMARK (SP);
634 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 1114 PUSHs ((SV *)coro->startcv);
635 PUTBACK; 1115 PUTBACK;
636 PL_op = (OP *)&myop; 1116 PL_op = (OP *)&myop;
637 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1117 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
638 SPAGAIN;
639 } 1118 }
640 1119
641 ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */ 1120 /* this newly created coroutine might be run on an existing cctx which most
642} 1121 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1122 */
1123 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1124 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1125 slf_frame.destroy = 0;
643 1126
1127 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1128 init_perl_op.op_next = PL_op;
1129 init_perl_op.op_type = OP_ENTERSUB;
1130 init_perl_op.op_ppaddr = pp_slf;
1131 /* no flags etc. required, as an init function won't be called */
1132
1133 PL_op = (OP *)&init_perl_op;
1134
1135 /* copy throw, in case it was set before init_perl */
1136 CORO_THROW = coro->except;
1137
1138 SWAP_SVS (coro);
1139
1140 if (ecb_expect_false (enable_times))
1141 {
1142 coro_times_update ();
1143 coro_times_sub (coro);
1144 }
1145}
1146
644static void 1147static void
645coro_destroy (pTHX_ struct coro *coro) 1148coro_unwind_stacks (pTHX)
646{ 1149{
647 if (!IN_DESTRUCT) 1150 if (!IN_DESTRUCT)
648 { 1151 {
649 /* restore all saved variables and stuff */ 1152 /* restore all saved variables and stuff */
650 LEAVE_SCOPE (0); 1153 LEAVE_SCOPE (0);
… …
658 POPSTACK_TO (PL_mainstack); 1161 POPSTACK_TO (PL_mainstack);
659 1162
660 /* unwind main stack */ 1163 /* unwind main stack */
661 dounwind (-1); 1164 dounwind (-1);
662 } 1165 }
1166}
663 1167
664 SvREFCNT_dec (GvSV (PL_defgv)); 1168static void
665 SvREFCNT_dec (GvAV (PL_defgv)); 1169destroy_perl (pTHX_ struct coro *coro)
666 SvREFCNT_dec (GvSV (PL_errgv)); 1170{
667 SvREFCNT_dec (PL_defoutgv); 1171 SV *svf [9];
668 SvREFCNT_dec (PL_rs);
669 SvREFCNT_dec (GvSV (irsgv));
670 1172
1173 {
1174 SV *old_current = SvRV (coro_current);
1175 struct coro *current = SvSTATE (old_current);
1176
1177 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1178
1179 save_perl (aTHX_ current);
1180
1181 /* this will cause transfer_check to croak on block*/
1182 SvRV_set (coro_current, (SV *)coro->hv);
1183
1184 load_perl (aTHX_ coro);
1185
1186 coro_unwind_stacks (aTHX);
1187
1188 /* restore swapped sv's */
1189 SWAP_SVS (coro);
1190
1191 coro_destruct_stacks (aTHX);
1192
1193 // now save some sv's to be free'd later
1194 svf [0] = GvSV (PL_defgv);
1195 svf [1] = (SV *)GvAV (PL_defgv);
1196 svf [2] = GvSV (PL_errgv);
1197 svf [3] = (SV *)PL_defoutgv;
1198 svf [4] = PL_rs;
1199 svf [5] = GvSV (irsgv);
1200 svf [6] = (SV *)GvHV (PL_hintgv);
1201 svf [7] = PL_diehook;
1202 svf [8] = PL_warnhook;
1203 assert (9 == sizeof (svf) / sizeof (*svf));
1204
1205 SvRV_set (coro_current, old_current);
1206
1207 load_perl (aTHX_ current);
1208 }
1209
1210 {
1211 unsigned int i;
1212
1213 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1214 SvREFCNT_dec (svf [i]);
1215
671 SvREFCNT_dec (coro->saved_deffh); 1216 SvREFCNT_dec (coro->saved_deffh);
672 //SvREFCNT_dec (coro->throw); 1217 SvREFCNT_dec (coro->rouse_cb);
673 1218 SvREFCNT_dec (coro->invoke_cb);
674 coro_destroy_stacks (aTHX); 1219 SvREFCNT_dec (coro->invoke_av);
1220 }
675} 1221}
676 1222
677static void 1223ECB_INLINE void
678free_coro_mortal (pTHX) 1224free_coro_mortal (pTHX)
679{ 1225{
680 if (expect_true (coro_mortal)) 1226 if (ecb_expect_true (coro_mortal))
681 { 1227 {
682 SvREFCNT_dec (coro_mortal); 1228 SvREFCNT_dec ((SV *)coro_mortal);
683 coro_mortal = 0; 1229 coro_mortal = 0;
684 } 1230 }
685} 1231}
686 1232
687static int 1233static int
688runops_trace (pTHX) 1234runops_trace (pTHX)
689{ 1235{
690 COP *oldcop = 0; 1236 COP *oldcop = 0;
691 int oldcxix = -2; 1237 int oldcxix = -2;
692 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
693 coro_cctx *cctx = coro->cctx;
694 1238
695 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1239 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
696 { 1240 {
697 PERL_ASYNC_CHECK (); 1241 PERL_ASYNC_CHECK ();
698 1242
699 if (cctx->flags & CC_TRACE_ALL) 1243 if (cctx_current->flags & CC_TRACE_ALL)
700 { 1244 {
701 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1245 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
702 { 1246 {
703 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1247 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
704 SV **bot, **top; 1248 SV **bot, **top;
705 AV *av = newAV (); /* return values */ 1249 AV *av = newAV (); /* return values */
706 SV **cb; 1250 SV **cb;
… …
716 : cx->blk_gimme == G_SCALAR ? bot + 1 1260 : cx->blk_gimme == G_SCALAR ? bot + 1
717 : bot; 1261 : bot;
718 1262
719 av_extend (av, top - bot); 1263 av_extend (av, top - bot);
720 while (bot < top) 1264 while (bot < top)
721 av_push (av, SvREFCNT_inc (*bot++)); 1265 av_push (av, SvREFCNT_inc_NN (*bot++));
722 1266
723 PL_runops = RUNOPS_DEFAULT; 1267 PL_runops = RUNOPS_DEFAULT;
724 ENTER; 1268 ENTER;
725 SAVETMPS; 1269 SAVETMPS;
726 EXTEND (SP, 3); 1270 EXTEND (SP, 3);
… …
743 1287
744 if (PL_curcop != &PL_compiling) 1288 if (PL_curcop != &PL_compiling)
745 { 1289 {
746 SV **cb; 1290 SV **cb;
747 1291
748 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1292 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
749 { 1293 {
750 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1294 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
751 1295
752 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1296 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
753 { 1297 {
754 runops_proc_t old_runops = PL_runops;
755 dSP; 1298 dSP;
756 GV *gv = CvGV (cx->blk_sub.cv); 1299 GV *gv = CvGV (cx->blk_sub.cv);
757 SV *fullname = sv_2mortal (newSV (0)); 1300 SV *fullname = sv_2mortal (newSV (0));
758 1301
759 if (isGV (gv)) 1302 if (isGV (gv))
… …
764 SAVETMPS; 1307 SAVETMPS;
765 EXTEND (SP, 3); 1308 EXTEND (SP, 3);
766 PUSHMARK (SP); 1309 PUSHMARK (SP);
767 PUSHs (&PL_sv_yes); 1310 PUSHs (&PL_sv_yes);
768 PUSHs (fullname); 1311 PUSHs (fullname);
769 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1312 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
770 PUTBACK; 1313 PUTBACK;
771 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1314 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
772 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1315 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
773 SPAGAIN; 1316 SPAGAIN;
774 FREETMPS; 1317 FREETMPS;
… …
777 } 1320 }
778 1321
779 oldcxix = cxstack_ix; 1322 oldcxix = cxstack_ix;
780 } 1323 }
781 1324
782 if (cctx->flags & CC_TRACE_LINE) 1325 if (cctx_current->flags & CC_TRACE_LINE)
783 { 1326 {
784 dSP; 1327 dSP;
785 1328
786 PL_runops = RUNOPS_DEFAULT; 1329 PL_runops = RUNOPS_DEFAULT;
787 ENTER; 1330 ENTER;
… …
806 1349
807 TAINT_NOT; 1350 TAINT_NOT;
808 return 0; 1351 return 0;
809} 1352}
810 1353
811/* inject a fake call to Coro::State::_cctx_init into the execution */ 1354static struct CoroSLF cctx_ssl_frame;
812/* _cctx_init should be careful, as it could be called at almost any time */
813/* during execution of a perl program */
814static void NOINLINE
815prepare_cctx (pTHX_ coro_cctx *cctx)
816{
817 dSP;
818 LOGOP myop;
819 1355
1356static void
1357slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1358{
1359 ta->prev = 0;
1360}
1361
1362static int
1363slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1364{
1365 *frame = cctx_ssl_frame;
1366
1367 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1368}
1369
1370/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1371static void ecb_noinline
1372cctx_prepare (pTHX)
1373{
820 PL_top_env = &PL_start_env; 1374 PL_top_env = &PL_start_env;
821 1375
822 if (cctx->flags & CC_TRACE) 1376 if (cctx_current->flags & CC_TRACE)
823 PL_runops = runops_trace; 1377 PL_runops = runops_trace;
824 1378
825 Zero (&myop, 1, LOGOP); 1379 /* we already must be executing an SLF op, there is no other valid way
826 myop.op_next = PL_op; 1380 * that can lead to creation of a new cctx */
827 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1381 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1382 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
828 1383
829 PUSHMARK (SP); 1384 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
830 EXTEND (SP, 2); 1385 cctx_ssl_frame = slf_frame;
831 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1386
832 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1387 slf_frame.prepare = slf_prepare_set_stacklevel;
833 PUTBACK; 1388 slf_frame.check = slf_check_set_stacklevel;
834 PL_op = (OP *)&myop; 1389}
835 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1390
836 SPAGAIN; 1391/* the tail of transfer: execute stuff we can only do after a transfer */
1392ECB_INLINE void
1393transfer_tail (pTHX)
1394{
1395 free_coro_mortal (aTHX);
837} 1396}
838 1397
839/* 1398/*
840 * this is a _very_ stripped down perl interpreter ;) 1399 * this is a _very_ stripped down perl interpreter ;)
841 */ 1400 */
842static void 1401static void
843coro_run (void *arg) 1402cctx_run (void *arg)
844{ 1403{
1404#ifdef USE_ITHREADS
1405# if CORO_PTHREAD
1406 PERL_SET_CONTEXT (coro_thx);
1407# endif
1408#endif
1409 {
845 dTHX; 1410 dTHX;
846 1411
847 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1412 /* normally we would need to skip the entersub here */
848 UNLOCK; 1413 /* not doing so will re-execute it, which is exactly what we want */
849
850 /* we now skip the entersub that lead to transfer() */
851 PL_op = PL_op->op_next; 1414 /* PL_nop = PL_nop->op_next */
852 1415
853 /* inject a fake subroutine call to cctx_init */ 1416 /* inject a fake subroutine call to cctx_init */
854 prepare_cctx (aTHX_ (coro_cctx *)arg); 1417 cctx_prepare (aTHX);
855 1418
1419 /* cctx_run is the alternative tail of transfer() */
1420 transfer_tail (aTHX);
1421
856 /* somebody or something will hit me for both perl_run and PL_restartop */ 1422 /* somebody or something will hit me for both perl_run and PL_restartop */
857 PL_restartop = PL_op; 1423 PL_restartop = PL_op;
858 perl_run (PL_curinterp); 1424 perl_run (PL_curinterp);
859
860 /* 1425 /*
1426 * Unfortunately, there is no way to get at the return values of the
1427 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1428 * runtime errors here, as this is just a random interpreter, not a thread.
1429 */
1430
1431 /*
861 * If perl-run returns we assume exit() was being called or the coro 1432 * If perl-run returns we assume exit() was being called or the coro
862 * fell off the end, which seems to be the only valid (non-bug) 1433 * fell off the end, which seems to be the only valid (non-bug)
863 * reason for perl_run to return. We try to exit by jumping to the 1434 * reason for perl_run to return. We try to exit by jumping to the
864 * bootstrap-time "top" top_env, as we cannot restore the "main" 1435 * bootstrap-time "top" top_env, as we cannot restore the "main"
865 * coroutine as Coro has no such concept 1436 * coroutine as Coro has no such concept.
1437 * This actually isn't valid with the pthread backend, but OSes requiring
1438 * that backend are too broken to do it in a standards-compliant way.
866 */ 1439 */
867 PL_top_env = main_top_env; 1440 PL_top_env = main_top_env;
868 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1441 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1442 }
869} 1443}
870 1444
871static coro_cctx * 1445static coro_cctx *
872cctx_new () 1446cctx_new ()
873{ 1447{
874 coro_cctx *cctx; 1448 coro_cctx *cctx;
1449
1450 ++cctx_count;
1451 New (0, cctx, 1, coro_cctx);
1452
1453 cctx->gen = cctx_gen;
1454 cctx->flags = 0;
1455 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1456
1457 return cctx;
1458}
1459
1460/* create a new cctx only suitable as source */
1461static coro_cctx *
1462cctx_new_empty ()
1463{
1464 coro_cctx *cctx = cctx_new ();
1465
1466 cctx->sptr = 0;
1467 coro_create (&cctx->cctx, 0, 0, 0, 0);
1468
1469 return cctx;
1470}
1471
1472/* create a new cctx suitable as destination/running a perl interpreter */
1473static coro_cctx *
1474cctx_new_run ()
1475{
1476 coro_cctx *cctx = cctx_new ();
875 void *stack_start; 1477 void *stack_start;
876 size_t stack_size; 1478 size_t stack_size;
877 1479
878 ++cctx_count;
879
880 Newz (0, cctx, 1, coro_cctx);
881
882#if HAVE_MMAP 1480#if HAVE_MMAP
883
884 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1481 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
885 /* mmap supposedly does allocate-on-write for us */ 1482 /* mmap supposedly does allocate-on-write for us */
886 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1483 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
887 1484
888 if (cctx->sptr != (void *)-1) 1485 if (cctx->sptr != (void *)-1)
889 { 1486 {
890# if CORO_STACKGUARD 1487 #if CORO_STACKGUARD
891 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1488 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
892# endif 1489 #endif
893 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1490 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
894 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1491 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
895 cctx->flags |= CC_MAPPED; 1492 cctx->flags |= CC_MAPPED;
896 } 1493 }
897 else 1494 else
898#endif 1495#endif
899 { 1496 {
900 cctx->ssize = coro_stacksize * (long)sizeof (long); 1497 cctx->ssize = cctx_stacksize * (long)sizeof (long);
901 New (0, cctx->sptr, coro_stacksize, long); 1498 New (0, cctx->sptr, cctx_stacksize, long);
902 1499
903 if (!cctx->sptr) 1500 if (!cctx->sptr)
904 { 1501 {
905 perror ("FATAL: unable to allocate stack for coroutine"); 1502 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
906 _exit (EXIT_FAILURE); 1503 _exit (EXIT_FAILURE);
907 } 1504 }
908 1505
909 stack_start = cctx->sptr; 1506 stack_start = cctx->sptr;
910 stack_size = cctx->ssize; 1507 stack_size = cctx->ssize;
911 } 1508 }
912 1509
913 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1510 #if CORO_USE_VALGRIND
1511 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1512 #endif
1513
914 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1514 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
915 1515
916 return cctx; 1516 return cctx;
917} 1517}
918 1518
919static void 1519static void
920cctx_destroy (coro_cctx *cctx) 1520cctx_destroy (coro_cctx *cctx)
921{ 1521{
922 if (!cctx) 1522 if (!cctx)
923 return; 1523 return;
924 1524
1525 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1526
925 --cctx_count; 1527 --cctx_count;
1528 coro_destroy (&cctx->cctx);
926 1529
1530 /* coro_transfer creates new, empty cctx's */
1531 if (cctx->sptr)
1532 {
927#if CORO_USE_VALGRIND 1533 #if CORO_USE_VALGRIND
928 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1534 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1535 #endif
1536
1537#if HAVE_MMAP
1538 if (cctx->flags & CC_MAPPED)
1539 munmap (cctx->sptr, cctx->ssize);
1540 else
929#endif 1541#endif
930
931#if HAVE_MMAP
932 if (cctx->flags & CC_MAPPED)
933 munmap (cctx->sptr, cctx->ssize);
934 else
935#endif
936 Safefree (cctx->sptr); 1542 Safefree (cctx->sptr);
1543 }
937 1544
938 Safefree (cctx); 1545 Safefree (cctx);
939} 1546}
940 1547
941/* wether this cctx should be destructed */ 1548/* wether this cctx should be destructed */
942#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1549#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
943 1550
944static coro_cctx * 1551static coro_cctx *
945cctx_get (pTHX) 1552cctx_get (pTHX)
946{ 1553{
947 while (expect_true (cctx_first)) 1554 while (ecb_expect_true (cctx_first))
948 { 1555 {
949 coro_cctx *cctx = cctx_first; 1556 coro_cctx *cctx = cctx_first;
950 cctx_first = cctx->next; 1557 cctx_first = cctx->next;
951 --cctx_idle; 1558 --cctx_idle;
952 1559
953 if (expect_true (!CCTX_EXPIRED (cctx))) 1560 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
954 return cctx; 1561 return cctx;
955 1562
956 cctx_destroy (cctx); 1563 cctx_destroy (cctx);
957 } 1564 }
958 1565
959 return cctx_new (); 1566 return cctx_new_run ();
960} 1567}
961 1568
962static void 1569static void
963cctx_put (coro_cctx *cctx) 1570cctx_put (coro_cctx *cctx)
964{ 1571{
1572 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1573
965 /* free another cctx if overlimit */ 1574 /* free another cctx if overlimit */
966 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1575 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
967 { 1576 {
968 coro_cctx *first = cctx_first; 1577 coro_cctx *first = cctx_first;
969 cctx_first = first->next; 1578 cctx_first = first->next;
970 --cctx_idle; 1579 --cctx_idle;
971 1580
… …
980/** coroutine switching *****************************************************/ 1589/** coroutine switching *****************************************************/
981 1590
982static void 1591static void
983transfer_check (pTHX_ struct coro *prev, struct coro *next) 1592transfer_check (pTHX_ struct coro *prev, struct coro *next)
984{ 1593{
1594 /* TODO: throwing up here is considered harmful */
1595
985 if (expect_true (prev != next)) 1596 if (ecb_expect_true (prev != next))
986 { 1597 {
987 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1598 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
988 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1599 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
989 1600
990 if (expect_false (next->flags & CF_RUNNING)) 1601 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
991 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
992
993 if (expect_false (next->flags & CF_DESTROYED))
994 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1602 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
995 1603
1604#if !PERL_VERSION_ATLEAST (5,10,0)
996 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1605 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
997 croak ("Coro::State::transfer called while parsing, but this is not supported"); 1606 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1607#endif
998 } 1608 }
999} 1609}
1000 1610
1001/* always use the TRANSFER macro */ 1611/* always use the TRANSFER macro */
1002static void NOINLINE 1612static void ecb_noinline /* noinline so we have a fixed stackframe */
1003transfer (pTHX_ struct coro *prev, struct coro *next) 1613transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1004{ 1614{
1005 dSTACKLEVEL; 1615 dSTACKLEVEL;
1006 1616
1007 /* sometimes transfer is only called to set idle_sp */ 1617 /* sometimes transfer is only called to set idle_sp */
1008 if (expect_false (!next)) 1618 if (ecb_expect_false (!prev))
1009 { 1619 {
1010 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1620 cctx_current->idle_sp = STACKLEVEL;
1011 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1621 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1012 } 1622 }
1013 else if (expect_true (prev != next)) 1623 else if (ecb_expect_true (prev != next))
1014 { 1624 {
1015 coro_cctx *prev__cctx; 1625 coro_cctx *cctx_prev;
1016 1626
1017 if (expect_false (prev->flags & CF_NEW)) 1627 if (ecb_expect_false (prev->flags & CF_NEW))
1018 { 1628 {
1019 /* create a new empty context */ 1629 /* create a new empty/source context */
1020 Newz (0, prev->cctx, 1, coro_cctx);
1021 prev->flags &= ~CF_NEW; 1630 prev->flags &= ~CF_NEW;
1022 prev->flags |= CF_RUNNING; 1631 prev->flags |= CF_RUNNING;
1023 } 1632 }
1024 1633
1025 prev->flags &= ~CF_RUNNING; 1634 prev->flags &= ~CF_RUNNING;
1026 next->flags |= CF_RUNNING; 1635 next->flags |= CF_RUNNING;
1027 1636
1028 LOCK; 1637 /* first get rid of the old state */
1638 save_perl (aTHX_ prev);
1029 1639
1030 if (expect_false (next->flags & CF_NEW)) 1640 if (ecb_expect_false (next->flags & CF_NEW))
1031 { 1641 {
1032 /* need to start coroutine */ 1642 /* need to start coroutine */
1033 next->flags &= ~CF_NEW; 1643 next->flags &= ~CF_NEW;
1034 /* first get rid of the old state */
1035 save_perl (aTHX_ prev);
1036 /* setup coroutine call */ 1644 /* setup coroutine call */
1037 coro_setup (aTHX_ next); 1645 init_perl (aTHX_ next);
1038 } 1646 }
1039 else 1647 else
1648 load_perl (aTHX_ next);
1649
1650 /* possibly untie and reuse the cctx */
1651 if (ecb_expect_true (
1652 cctx_current->idle_sp == STACKLEVEL
1653 && !(cctx_current->flags & CC_TRACE)
1654 && !force_cctx
1655 ))
1040 { 1656 {
1041 /* coroutine already started */ 1657 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1042 save_perl (aTHX_ prev); 1658 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1043 load_perl (aTHX_ next); 1659
1660 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1661 /* without this the next cctx_get might destroy the running cctx while still in use */
1662 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1663 if (ecb_expect_true (!next->cctx))
1664 next->cctx = cctx_get (aTHX);
1665
1666 cctx_put (cctx_current);
1044 } 1667 }
1668 else
1669 prev->cctx = cctx_current;
1045 1670
1046 prev__cctx = prev->cctx; 1671 ++next->usecount;
1047 1672
1048 /* possibly "free" the cctx */ 1673 cctx_prev = cctx_current;
1049 if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))) 1674 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1675
1676 next->cctx = 0;
1677
1678 if (ecb_expect_false (cctx_prev != cctx_current))
1050 { 1679 {
1051 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1680 cctx_prev->top_env = PL_top_env;
1052 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1681 PL_top_env = cctx_current->top_env;
1053 1682 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1054 prev->cctx = 0;
1055
1056 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1057 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1058 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1059 next->cctx = cctx_get (aTHX);
1060
1061 cctx_put (prev__cctx);
1062 } 1683 }
1063 1684
1064 ++next->usecount; 1685 transfer_tail (aTHX);
1065
1066 if (expect_true (!next->cctx))
1067 next->cctx = cctx_get (aTHX);
1068
1069 if (expect_false (prev__cctx != next->cctx))
1070 {
1071 prev__cctx->top_env = PL_top_env;
1072 PL_top_env = next->cctx->top_env;
1073 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1074 }
1075
1076 free_coro_mortal (aTHX);
1077 UNLOCK;
1078 } 1686 }
1079} 1687}
1080 1688
1081struct transfer_args
1082{
1083 struct coro *prev, *next;
1084};
1085
1086#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1689#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1087#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1690#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1088 1691
1089/** high level stuff ********************************************************/ 1692/** high level stuff ********************************************************/
1090 1693
1694/* this function is actually Coro, not Coro::State, but we call it from here */
1695/* because it is convenient - but it hasn't been declared yet for that reason */
1091static int 1696static void
1697coro_call_on_destroy (pTHX_ struct coro *coro);
1698
1699static void
1092coro_state_destroy (pTHX_ struct coro *coro) 1700coro_state_destroy (pTHX_ struct coro *coro)
1093{ 1701{
1094 if (coro->flags & CF_DESTROYED) 1702 if (coro->flags & CF_ZOMBIE)
1095 return 0; 1703 return;
1096 1704
1705 slf_destroy (aTHX_ coro);
1706
1097 coro->flags |= CF_DESTROYED; 1707 coro->flags |= CF_ZOMBIE;
1098 1708
1099 if (coro->flags & CF_READY) 1709 if (coro->flags & CF_READY)
1100 { 1710 {
1101 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1711 /* reduce nready, as destroying a ready coro effectively unreadies it */
1102 /* alternative: look through all ready queues and remove the coro */ 1712 /* alternative: look through all ready queues and remove the coro */
1103 LOCK;
1104 --coro_nready; 1713 --coro_nready;
1105 UNLOCK;
1106 } 1714 }
1107 else 1715 else
1108 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1716 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1109
1110 if (coro->mainstack && coro->mainstack != main_mainstack)
1111 {
1112 struct coro temp;
1113
1114 if (coro->flags & CF_RUNNING)
1115 croak ("FATAL: tried to destroy currently running coroutine");
1116
1117 save_perl (aTHX_ &temp);
1118 load_perl (aTHX_ coro);
1119
1120 coro_destroy (aTHX_ coro);
1121
1122 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
1123
1124 coro->mainstack = 0;
1125 }
1126
1127 cctx_destroy (coro->cctx);
1128 SvREFCNT_dec (coro->args);
1129 1717
1130 if (coro->next) coro->next->prev = coro->prev; 1718 if (coro->next) coro->next->prev = coro->prev;
1131 if (coro->prev) coro->prev->next = coro->next; 1719 if (coro->prev) coro->prev->next = coro->next;
1132 if (coro == coro_first) coro_first = coro->next; 1720 if (coro == coro_first) coro_first = coro->next;
1133 1721
1134 return 1; 1722 if (coro->mainstack
1723 && coro->mainstack != main_mainstack
1724 && coro->slot
1725 && !PL_dirty)
1726 destroy_perl (aTHX_ coro);
1727
1728 cctx_destroy (coro->cctx);
1729 SvREFCNT_dec (coro->startcv);
1730 SvREFCNT_dec (coro->args);
1731 SvREFCNT_dec (coro->swap_sv);
1732 SvREFCNT_dec (CORO_THROW);
1733
1734 coro_call_on_destroy (aTHX_ coro);
1735
1736 /* more destruction mayhem in coro_state_free */
1135} 1737}
1136 1738
1137static int 1739static int
1138coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1740coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1139{ 1741{
1140 struct coro *coro = (struct coro *)mg->mg_ptr; 1742 struct coro *coro = (struct coro *)mg->mg_ptr;
1141 mg->mg_ptr = 0; 1743 mg->mg_ptr = 0;
1142 1744
1143 coro->hv = 0;
1144
1145 if (--coro->refcnt < 0)
1146 {
1147 coro_state_destroy (aTHX_ coro); 1745 coro_state_destroy (aTHX_ coro);
1746 SvREFCNT_dec (coro->on_destroy);
1747 SvREFCNT_dec (coro->status);
1748
1148 Safefree (coro); 1749 Safefree (coro);
1149 }
1150 1750
1151 return 0; 1751 return 0;
1152} 1752}
1153 1753
1154static int 1754static int ecb_cold
1155coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1755coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1156{ 1756{
1157 struct coro *coro = (struct coro *)mg->mg_ptr; 1757 /* called when perl clones the current process the slow way (windows process emulation) */
1158 1758 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1159 ++coro->refcnt; 1759 mg->mg_ptr = 0;
1760 mg->mg_virtual = 0;
1160 1761
1161 return 0; 1762 return 0;
1162} 1763}
1163 1764
1164static MGVTBL coro_state_vtbl = { 1765static MGVTBL coro_state_vtbl = {
… …
1171# define MGf_DUP 0 1772# define MGf_DUP 0
1172#endif 1773#endif
1173}; 1774};
1174 1775
1175static void 1776static void
1176prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1777prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1177{ 1778{
1178 ta->prev = SvSTATE (prev_sv); 1779 ta->prev = SvSTATE (prev_sv);
1179 ta->next = SvSTATE (next_sv); 1780 ta->next = SvSTATE (next_sv);
1180 TRANSFER_CHECK (*ta); 1781 TRANSFER_CHECK (*ta);
1181} 1782}
1182 1783
1183static void 1784static void
1184api_transfer (SV *prev_sv, SV *next_sv) 1785api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1786{
1787 struct coro_transfer_args ta;
1788
1789 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1790 TRANSFER (ta, 1);
1791}
1792
1793/** Coro ********************************************************************/
1794
1795ECB_INLINE void
1796coro_enq (pTHX_ struct coro *coro)
1797{
1798 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1799
1800 SvREFCNT_inc_NN (coro->hv);
1801
1802 coro->next_ready = 0;
1803 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1804 ready [1] = coro;
1805}
1806
1807ECB_INLINE struct coro *
1808coro_deq (pTHX)
1809{
1810 int prio;
1811
1812 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1813 {
1814 struct coro **ready = coro_ready [prio];
1815
1816 if (ready [0])
1817 {
1818 struct coro *coro = ready [0];
1819 ready [0] = coro->next_ready;
1820 return coro;
1821 }
1822 }
1823
1824 return 0;
1825}
1826
1827static void
1828invoke_sv_ready_hook_helper (void)
1185{ 1829{
1186 dTHX; 1830 dTHX;
1187 struct transfer_args ta; 1831 dSP;
1188 1832
1189 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1833 ENTER;
1190 TRANSFER (ta); 1834 SAVETMPS;
1191}
1192 1835
1193/** Coro ********************************************************************/ 1836 PUSHMARK (SP);
1837 PUTBACK;
1838 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1194 1839
1195static void 1840 FREETMPS;
1196coro_enq (pTHX_ SV *coro_sv) 1841 LEAVE;
1197{
1198 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1199}
1200
1201static SV *
1202coro_deq (pTHX_ int min_prio)
1203{
1204 int prio = PRIO_MAX - PRIO_MIN;
1205
1206 min_prio -= PRIO_MIN;
1207 if (min_prio < 0)
1208 min_prio = 0;
1209
1210 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1211 if (AvFILLp (coro_ready [prio]) >= 0)
1212 return av_shift (coro_ready [prio]);
1213
1214 return 0;
1215} 1842}
1216 1843
1217static int 1844static int
1218api_ready (SV *coro_sv) 1845api_ready (pTHX_ SV *coro_sv)
1219{ 1846{
1220 dTHX;
1221 struct coro *coro;
1222
1223 if (SvROK (coro_sv))
1224 coro_sv = SvRV (coro_sv);
1225
1226 coro = SvSTATE (coro_sv); 1847 struct coro *coro = SvSTATE (coro_sv);
1227 1848
1228 if (coro->flags & CF_READY) 1849 if (coro->flags & CF_READY)
1229 return 0; 1850 return 0;
1230 1851
1231 coro->flags |= CF_READY; 1852 coro->flags |= CF_READY;
1232 1853
1233 LOCK; 1854 coro_enq (aTHX_ coro);
1234 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1855
1235 ++coro_nready; 1856 if (!coro_nready++)
1236 UNLOCK; 1857 if (coroapi.readyhook)
1858 coroapi.readyhook ();
1237 1859
1238 return 1; 1860 return 1;
1239} 1861}
1240 1862
1241static int 1863static int
1242api_is_ready (SV *coro_sv) 1864api_is_ready (pTHX_ SV *coro_sv)
1243{ 1865{
1244 dTHX;
1245 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1866 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1246} 1867}
1247 1868
1248static void 1869/* expects to own a reference to next->hv */
1870ECB_INLINE void
1249prepare_schedule (pTHX_ struct transfer_args *ta) 1871prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1250{ 1872{
1251 SV *prev_sv, *next_sv;
1252
1253 for (;;)
1254 {
1255 LOCK;
1256 next_sv = coro_deq (aTHX_ PRIO_MIN);
1257
1258 /* nothing to schedule: call the idle handler */
1259 if (expect_false (!next_sv))
1260 {
1261 dSP;
1262 UNLOCK;
1263
1264 ENTER;
1265 SAVETMPS;
1266
1267 PUSHMARK (SP);
1268 PUTBACK;
1269 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1270
1271 FREETMPS;
1272 LEAVE;
1273 continue;
1274 }
1275
1276 ta->next = SvSTATE (next_sv);
1277
1278 /* cannot transfer to destroyed coros, skip and look for next */
1279 if (expect_false (ta->next->flags & CF_DESTROYED))
1280 {
1281 UNLOCK;
1282 SvREFCNT_dec (next_sv);
1283 /* coro_nready is already taken care of by destroy */
1284 continue;
1285 }
1286
1287 --coro_nready;
1288 UNLOCK;
1289 break;
1290 }
1291
1292 /* free this only after the transfer */
1293 prev_sv = SvRV (coro_current); 1873 SV *prev_sv = SvRV (coro_current);
1874
1294 ta->prev = SvSTATE (prev_sv); 1875 ta->prev = SvSTATE_hv (prev_sv);
1876 ta->next = next;
1877
1295 TRANSFER_CHECK (*ta); 1878 TRANSFER_CHECK (*ta);
1296 assert (ta->next->flags & CF_READY); 1879
1297 ta->next->flags &= ~CF_READY;
1298 SvRV_set (coro_current, next_sv); 1880 SvRV_set (coro_current, (SV *)next->hv);
1299 1881
1300 LOCK;
1301 free_coro_mortal (aTHX); 1882 free_coro_mortal (aTHX);
1302 coro_mortal = prev_sv; 1883 coro_mortal = prev_sv;
1303 UNLOCK;
1304} 1884}
1305 1885
1306static void 1886static void
1887prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1888{
1889 for (;;)
1890 {
1891 struct coro *next = coro_deq (aTHX);
1892
1893 if (ecb_expect_true (next))
1894 {
1895 /* cannot transfer to destroyed coros, skip and look for next */
1896 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1897 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1898 else
1899 {
1900 next->flags &= ~CF_READY;
1901 --coro_nready;
1902
1903 prepare_schedule_to (aTHX_ ta, next);
1904 break;
1905 }
1906 }
1907 else
1908 {
1909 /* nothing to schedule: call the idle handler */
1910 if (SvROK (sv_idle)
1911 && SvOBJECT (SvRV (sv_idle)))
1912 {
1913 if (SvRV (sv_idle) == SvRV (coro_current))
1914 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1915
1916 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1917 api_ready (aTHX_ SvRV (sv_idle));
1918 --coro_nready;
1919 }
1920 else
1921 {
1922 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1923 dSP;
1924
1925 ENTER;
1926 SAVETMPS;
1927
1928 PUSHMARK (SP);
1929 PUTBACK;
1930 call_sv (sv_idle, G_VOID | G_DISCARD);
1931
1932 FREETMPS;
1933 LEAVE;
1934 }
1935 }
1936 }
1937}
1938
1939ECB_INLINE void
1307prepare_cede (pTHX_ struct transfer_args *ta) 1940prepare_cede (pTHX_ struct coro_transfer_args *ta)
1308{ 1941{
1309 api_ready (coro_current); 1942 api_ready (aTHX_ coro_current);
1310 prepare_schedule (aTHX_ ta); 1943 prepare_schedule (aTHX_ ta);
1311} 1944}
1312 1945
1946ECB_INLINE void
1947prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1948{
1949 SV *prev = SvRV (coro_current);
1950
1951 if (coro_nready)
1952 {
1953 prepare_schedule (aTHX_ ta);
1954 api_ready (aTHX_ prev);
1955 }
1956 else
1957 prepare_nop (aTHX_ ta);
1958}
1959
1960static void
1961api_schedule (pTHX)
1962{
1963 struct coro_transfer_args ta;
1964
1965 prepare_schedule (aTHX_ &ta);
1966 TRANSFER (ta, 1);
1967}
1968
1969static void
1970api_schedule_to (pTHX_ SV *coro_sv)
1971{
1972 struct coro_transfer_args ta;
1973 struct coro *next = SvSTATE (coro_sv);
1974
1975 SvREFCNT_inc_NN (coro_sv);
1976 prepare_schedule_to (aTHX_ &ta, next);
1977}
1978
1313static int 1979static int
1314prepare_cede_notself (pTHX_ struct transfer_args *ta) 1980api_cede (pTHX)
1315{ 1981{
1316 if (coro_nready) 1982 struct coro_transfer_args ta;
1317 { 1983
1318 SV *prev = SvRV (coro_current);
1319 prepare_schedule (aTHX_ ta); 1984 prepare_cede (aTHX_ &ta);
1320 api_ready (prev); 1985
1986 if (ecb_expect_true (ta.prev != ta.next))
1987 {
1988 TRANSFER (ta, 1);
1321 return 1; 1989 return 1;
1322 } 1990 }
1323 else 1991 else
1324 return 0; 1992 return 0;
1325} 1993}
1326 1994
1327static void
1328api_schedule (void)
1329{
1330 dTHX;
1331 struct transfer_args ta;
1332
1333 prepare_schedule (aTHX_ &ta);
1334 TRANSFER (ta);
1335}
1336
1337static int 1995static int
1338api_cede (void) 1996api_cede_notself (pTHX)
1339{ 1997{
1340 dTHX; 1998 if (coro_nready)
1999 {
1341 struct transfer_args ta; 2000 struct coro_transfer_args ta;
1342 2001
1343 prepare_cede (aTHX_ &ta); 2002 prepare_cede_notself (aTHX_ &ta);
1344
1345 if (expect_true (ta.prev != ta.next))
1346 {
1347 TRANSFER (ta); 2003 TRANSFER (ta, 1);
1348 return 1; 2004 return 1;
1349 } 2005 }
1350 else 2006 else
1351 return 0; 2007 return 0;
1352} 2008}
1353 2009
1354static int 2010static void
1355api_cede_notself (void)
1356{
1357 dTHX;
1358 struct transfer_args ta;
1359
1360 if (prepare_cede_notself (aTHX_ &ta))
1361 {
1362 TRANSFER (ta);
1363 return 1;
1364 }
1365 else
1366 return 0;
1367}
1368
1369static void
1370api_trace (SV *coro_sv, int flags) 2011api_trace (pTHX_ SV *coro_sv, int flags)
1371{ 2012{
1372 dTHX;
1373 struct coro *coro = SvSTATE (coro_sv); 2013 struct coro *coro = SvSTATE (coro_sv);
1374 2014
2015 if (coro->flags & CF_RUNNING)
2016 croak ("cannot enable tracing on a running coroutine, caught");
2017
1375 if (flags & CC_TRACE) 2018 if (flags & CC_TRACE)
1376 { 2019 {
1377 if (!coro->cctx) 2020 if (!coro->cctx)
1378 coro->cctx = cctx_new (); 2021 coro->cctx = cctx_new_run ();
1379 else if (!(coro->cctx->flags & CC_TRACE)) 2022 else if (!(coro->cctx->flags & CC_TRACE))
1380 croak ("cannot enable tracing on coroutine with custom stack"); 2023 croak ("cannot enable tracing on coroutine with custom stack, caught");
1381 2024
1382 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 2025 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1383 } 2026 }
1384 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 2027 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1385 { 2028 {
1386 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL); 2029 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1387 2030
1388 if (coro->flags & CF_RUNNING) 2031 if (coro->flags & CF_RUNNING)
1389 PL_runops = RUNOPS_DEFAULT; 2032 PL_runops = RUNOPS_DEFAULT;
1390 else 2033 else
1391 coro->runops = RUNOPS_DEFAULT; 2034 coro->slot->runops = RUNOPS_DEFAULT;
2035 }
2036}
2037
2038static void
2039coro_push_av (pTHX_ AV *av, I32 gimme_v)
2040{
2041 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2042 {
2043 dSP;
2044
2045 if (gimme_v == G_SCALAR)
2046 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2047 else
2048 {
2049 int i;
2050 EXTEND (SP, AvFILLp (av) + 1);
2051
2052 for (i = 0; i <= AvFILLp (av); ++i)
2053 PUSHs (AvARRAY (av)[i]);
2054 }
2055
2056 PUTBACK;
2057 }
2058}
2059
2060static void
2061coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2062{
2063 if (!coro->on_destroy)
2064 coro->on_destroy = newAV ();
2065
2066 av_push (coro->on_destroy, cb);
2067}
2068
2069static void
2070slf_destroy_join (pTHX_ struct CoroSLF *frame)
2071{
2072 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2073}
2074
2075static int
2076slf_check_join (pTHX_ struct CoroSLF *frame)
2077{
2078 struct coro *coro = (struct coro *)frame->data;
2079
2080 if (!coro->status)
2081 return 1;
2082
2083 frame->destroy = 0;
2084
2085 coro_push_av (aTHX_ coro->status, GIMME_V);
2086
2087 SvREFCNT_dec ((SV *)coro->hv);
2088
2089 return 0;
2090}
2091
2092static void
2093slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2094{
2095 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2096
2097 if (items > 1)
2098 croak ("join called with too many arguments");
2099
2100 if (coro->status)
2101 frame->prepare = prepare_nop;
2102 else
2103 {
2104 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2105 frame->prepare = prepare_schedule;
2106 }
2107
2108 frame->check = slf_check_join;
2109 frame->destroy = slf_destroy_join;
2110 frame->data = (void *)coro;
2111 SvREFCNT_inc (coro->hv);
2112}
2113
2114static void
2115coro_call_on_destroy (pTHX_ struct coro *coro)
2116{
2117 AV *od = coro->on_destroy;
2118
2119 if (!od)
2120 return;
2121
2122 while (AvFILLp (od) >= 0)
2123 {
2124 SV *cb = sv_2mortal (av_pop (od));
2125
2126 /* coro hv's (and only hv's at the moment) are supported as well */
2127 if (SvSTATEhv_p (aTHX_ cb))
2128 api_ready (aTHX_ cb);
2129 else
2130 {
2131 dSP; /* don't disturb outer sp */
2132 PUSHMARK (SP);
2133
2134 if (coro->status)
2135 {
2136 PUTBACK;
2137 coro_push_av (aTHX_ coro->status, G_ARRAY);
2138 SPAGAIN;
2139 }
2140
2141 PUTBACK;
2142 call_sv (cb, G_VOID | G_DISCARD);
2143 }
2144 }
2145}
2146
2147static void
2148coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2149{
2150 AV *av;
2151
2152 if (coro->status)
2153 {
2154 av = coro->status;
2155 av_clear (av);
2156 }
2157 else
2158 av = coro->status = newAV ();
2159
2160 /* items are actually not so common, so optimise for this case */
2161 if (items)
2162 {
2163 int i;
2164
2165 av_extend (av, items - 1);
2166
2167 for (i = 0; i < items; ++i)
2168 av_push (av, SvREFCNT_inc_NN (arg [i]));
2169 }
2170}
2171
2172static void
2173slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2174{
2175 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2176 api_ready (aTHX_ sv_manager);
2177
2178 frame->prepare = prepare_schedule;
2179 frame->check = slf_check_repeat;
2180
2181 /* as a minor optimisation, we could unwind all stacks here */
2182 /* but that puts extra pressure on pp_slf, and is not worth much */
2183 /*coro_unwind_stacks (aTHX);*/
2184}
2185
2186static void
2187slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2188{
2189 HV *coro_hv = (HV *)SvRV (coro_current);
2190
2191 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2192 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2193}
2194
2195static void
2196slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2197{
2198 HV *coro_hv;
2199 struct coro *coro;
2200
2201 if (items <= 0)
2202 croak ("Coro::cancel called without coro object,");
2203
2204 coro = SvSTATE (arg [0]);
2205 coro_hv = coro->hv;
2206
2207 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2208
2209 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2210 {
2211 /* coro currently busy cancelling something, so just notify it */
2212 coro->slf_frame.data = (void *)coro;
2213
2214 frame->prepare = prepare_nop;
2215 frame->check = slf_check_nop;
2216 }
2217 else if (coro_hv == (HV *)SvRV (coro_current))
2218 {
2219 /* cancelling the current coro is allowed, and equals terminate */
2220 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2221 }
2222 else
2223 {
2224 struct coro *self = SvSTATE_current;
2225
2226 /* otherwise we cancel directly, purely for speed reasons
2227 * unfortunately, this requires some magic trickery, as
2228 * somebody else could cancel us, so we have to fight the cancellation.
2229 * this is ugly, and hopefully fully worth the extra speed.
2230 * besides, I can't get the slow-but-safe version working...
2231 */
2232 slf_frame.data = 0;
2233 self->flags |= CF_NOCANCEL;
2234 coro_state_destroy (aTHX_ coro);
2235 self->flags &= ~CF_NOCANCEL;
2236
2237 if (slf_frame.data)
2238 {
2239 /* while we were busy we have been cancelled, so terminate */
2240 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2241 }
2242 else
2243 {
2244 frame->prepare = prepare_nop;
2245 frame->check = slf_check_nop;
2246 }
2247 }
2248}
2249
2250static int
2251slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2252{
2253 frame->prepare = 0;
2254 coro_unwind_stacks (aTHX);
2255
2256 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2257
2258 return 1;
2259}
2260
2261static int
2262safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2263{
2264 if (coro->cctx)
2265 croak ("coro inside C callback, unable to cancel at this time, caught");
2266
2267 if (coro->flags & CF_NEW)
2268 {
2269 coro_set_status (aTHX_ coro, arg, items);
2270 coro_state_destroy (aTHX_ coro);
2271 }
2272 else
2273 {
2274 if (!coro->slf_frame.prepare)
2275 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2276
2277 slf_destroy (aTHX_ coro);
2278
2279 coro_set_status (aTHX_ coro, arg, items);
2280 coro->slf_frame.prepare = prepare_nop;
2281 coro->slf_frame.check = slf_check_safe_cancel;
2282
2283 api_ready (aTHX_ (SV *)coro->hv);
2284 }
2285
2286 return 1;
2287}
2288
2289/*****************************************************************************/
2290/* async pool handler */
2291
2292static int
2293slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2294{
2295 HV *hv = (HV *)SvRV (coro_current);
2296 struct coro *coro = (struct coro *)frame->data;
2297
2298 if (!coro->invoke_cb)
2299 return 1; /* loop till we have invoke */
2300 else
2301 {
2302 hv_store (hv, "desc", sizeof ("desc") - 1,
2303 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2304
2305 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2306
2307 {
2308 dSP;
2309 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2310 PUTBACK;
1392 } 2311 }
2312
2313 SvREFCNT_dec (GvAV (PL_defgv));
2314 GvAV (PL_defgv) = coro->invoke_av;
2315 coro->invoke_av = 0;
2316
2317 return 0;
2318 }
1393} 2319}
2320
2321static void
2322slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2323{
2324 HV *hv = (HV *)SvRV (coro_current);
2325 struct coro *coro = SvSTATE_hv ((SV *)hv);
2326
2327 if (ecb_expect_true (coro->saved_deffh))
2328 {
2329 /* subsequent iteration */
2330 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2331 coro->saved_deffh = 0;
2332
2333 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2334 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2335 {
2336 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2337 return;
2338 }
2339 else
2340 {
2341 av_clear (GvAV (PL_defgv));
2342 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2343
2344 coro->prio = 0;
2345
2346 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2347 api_trace (aTHX_ coro_current, 0);
2348
2349 frame->prepare = prepare_schedule;
2350 av_push (av_async_pool, SvREFCNT_inc (hv));
2351 }
2352 }
2353 else
2354 {
2355 /* first iteration, simply fall through */
2356 frame->prepare = prepare_nop;
2357 }
2358
2359 frame->check = slf_check_pool_handler;
2360 frame->data = (void *)coro;
2361}
2362
2363/*****************************************************************************/
2364/* rouse callback */
2365
2366#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2367
2368static void
2369coro_rouse_callback (pTHX_ CV *cv)
2370{
2371 dXSARGS;
2372 SV *data = (SV *)S_GENSUB_ARG;
2373
2374 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2375 {
2376 /* first call, set args */
2377 SV *coro = SvRV (data);
2378 AV *av = newAV ();
2379
2380 SvRV_set (data, (SV *)av);
2381
2382 /* better take a full copy of the arguments */
2383 while (items--)
2384 av_store (av, items, newSVsv (ST (items)));
2385
2386 api_ready (aTHX_ coro);
2387 SvREFCNT_dec (coro);
2388 }
2389
2390 XSRETURN_EMPTY;
2391}
2392
2393static int
2394slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2395{
2396 SV *data = (SV *)frame->data;
2397
2398 if (CORO_THROW)
2399 return 0;
2400
2401 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2402 return 1;
2403
2404 /* now push all results on the stack */
2405 {
2406 dSP;
2407 AV *av = (AV *)SvRV (data);
2408 int i;
2409
2410 EXTEND (SP, AvFILLp (av) + 1);
2411 for (i = 0; i <= AvFILLp (av); ++i)
2412 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2413
2414 /* we have stolen the elements, so set length to zero and free */
2415 AvFILLp (av) = -1;
2416 av_undef (av);
2417
2418 PUTBACK;
2419 }
2420
2421 return 0;
2422}
2423
2424static void
2425slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2426{
2427 SV *cb;
2428
2429 if (items)
2430 cb = arg [0];
2431 else
2432 {
2433 struct coro *coro = SvSTATE_current;
2434
2435 if (!coro->rouse_cb)
2436 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2437
2438 cb = sv_2mortal (coro->rouse_cb);
2439 coro->rouse_cb = 0;
2440 }
2441
2442 if (!SvROK (cb)
2443 || SvTYPE (SvRV (cb)) != SVt_PVCV
2444 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2445 croak ("Coro::rouse_wait called with illegal callback argument,");
2446
2447 {
2448 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2449 SV *data = (SV *)S_GENSUB_ARG;
2450
2451 frame->data = (void *)data;
2452 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2453 frame->check = slf_check_rouse_wait;
2454 }
2455}
2456
2457static SV *
2458coro_new_rouse_cb (pTHX)
2459{
2460 HV *hv = (HV *)SvRV (coro_current);
2461 struct coro *coro = SvSTATE_hv (hv);
2462 SV *data = newRV_inc ((SV *)hv);
2463 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2464
2465 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2466 SvREFCNT_dec (data); /* magicext increases the refcount */
2467
2468 SvREFCNT_dec (coro->rouse_cb);
2469 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2470
2471 return cb;
2472}
2473
2474/*****************************************************************************/
2475/* schedule-like-function opcode (SLF) */
2476
2477static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2478static const CV *slf_cv;
2479static SV **slf_argv;
2480static int slf_argc, slf_arga; /* count, allocated */
2481static I32 slf_ax; /* top of stack, for restore */
2482
2483/* this restores the stack in the case we patched the entersub, to */
2484/* recreate the stack frame as perl will on following calls */
2485/* since entersub cleared the stack */
2486static OP *
2487pp_restore (pTHX)
2488{
2489 int i;
2490 SV **SP = PL_stack_base + slf_ax;
2491
2492 PUSHMARK (SP);
2493
2494 EXTEND (SP, slf_argc + 1);
2495
2496 for (i = 0; i < slf_argc; ++i)
2497 PUSHs (sv_2mortal (slf_argv [i]));
2498
2499 PUSHs ((SV *)CvGV (slf_cv));
2500
2501 RETURNOP (slf_restore.op_first);
2502}
2503
2504static void
2505slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2506{
2507 SV **arg = (SV **)slf_frame.data;
2508
2509 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2510}
2511
2512static void
2513slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2514{
2515 if (items != 2)
2516 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2517
2518 frame->prepare = slf_prepare_transfer;
2519 frame->check = slf_check_nop;
2520 frame->data = (void *)arg; /* let's hope it will stay valid */
2521}
2522
2523static void
2524slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2525{
2526 frame->prepare = prepare_schedule;
2527 frame->check = slf_check_nop;
2528}
2529
2530static void
2531slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2532{
2533 struct coro *next = (struct coro *)slf_frame.data;
2534
2535 SvREFCNT_inc_NN (next->hv);
2536 prepare_schedule_to (aTHX_ ta, next);
2537}
2538
2539static void
2540slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2541{
2542 if (!items)
2543 croak ("Coro::schedule_to expects a coroutine argument, caught");
2544
2545 frame->data = (void *)SvSTATE (arg [0]);
2546 frame->prepare = slf_prepare_schedule_to;
2547 frame->check = slf_check_nop;
2548}
2549
2550static void
2551slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2552{
2553 api_ready (aTHX_ SvRV (coro_current));
2554
2555 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2556}
2557
2558static void
2559slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2560{
2561 frame->prepare = prepare_cede;
2562 frame->check = slf_check_nop;
2563}
2564
2565static void
2566slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2567{
2568 frame->prepare = prepare_cede_notself;
2569 frame->check = slf_check_nop;
2570}
2571
2572/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2573static void
2574slf_destroy (pTHX_ struct coro *coro)
2575{
2576 /* this callback is reserved for slf functions needing to do cleanup */
2577 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2578 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2579
2580 /*
2581 * The on_destroy above most likely is from an SLF call.
2582 * Since by definition the SLF call will not finish when we destroy
2583 * the coro, we will have to force-finish it here, otherwise
2584 * cleanup functions cannot call SLF functions.
2585 */
2586 coro->slf_frame.prepare = 0;
2587}
2588
2589/*
2590 * these not obviously related functions are all rolled into one
2591 * function to increase chances that they all will call transfer with the same
2592 * stack offset
2593 * SLF stands for "schedule-like-function".
2594 */
2595static OP *
2596pp_slf (pTHX)
2597{
2598 I32 checkmark; /* mark SP to see how many elements check has pushed */
2599
2600 /* set up the slf frame, unless it has already been set-up */
2601 /* the latter happens when a new coro has been started */
2602 /* or when a new cctx was attached to an existing coroutine */
2603 if (ecb_expect_true (!slf_frame.prepare))
2604 {
2605 /* first iteration */
2606 dSP;
2607 SV **arg = PL_stack_base + TOPMARK + 1;
2608 int items = SP - arg; /* args without function object */
2609 SV *gv = *sp;
2610
2611 /* do a quick consistency check on the "function" object, and if it isn't */
2612 /* for us, divert to the real entersub */
2613 if (SvTYPE (gv) != SVt_PVGV
2614 || !GvCV (gv)
2615 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2616 return PL_ppaddr[OP_ENTERSUB](aTHX);
2617
2618 if (!(PL_op->op_flags & OPf_STACKED))
2619 {
2620 /* ampersand-form of call, use @_ instead of stack */
2621 AV *av = GvAV (PL_defgv);
2622 arg = AvARRAY (av);
2623 items = AvFILLp (av) + 1;
2624 }
2625
2626 /* now call the init function, which needs to set up slf_frame */
2627 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2628 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2629
2630 /* pop args */
2631 SP = PL_stack_base + POPMARK;
2632
2633 PUTBACK;
2634 }
2635
2636 /* now that we have a slf_frame, interpret it! */
2637 /* we use a callback system not to make the code needlessly */
2638 /* complicated, but so we can run multiple perl coros from one cctx */
2639
2640 do
2641 {
2642 struct coro_transfer_args ta;
2643
2644 slf_frame.prepare (aTHX_ &ta);
2645 TRANSFER (ta, 0);
2646
2647 checkmark = PL_stack_sp - PL_stack_base;
2648 }
2649 while (slf_frame.check (aTHX_ &slf_frame));
2650
2651 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2652
2653 /* exception handling */
2654 if (ecb_expect_false (CORO_THROW))
2655 {
2656 SV *exception = sv_2mortal (CORO_THROW);
2657
2658 CORO_THROW = 0;
2659 sv_setsv (ERRSV, exception);
2660 croak (0);
2661 }
2662
2663 /* return value handling - mostly like entersub */
2664 /* make sure we put something on the stack in scalar context */
2665 if (GIMME_V == G_SCALAR
2666 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2667 {
2668 dSP;
2669 SV **bot = PL_stack_base + checkmark;
2670
2671 if (sp == bot) /* too few, push undef */
2672 bot [1] = &PL_sv_undef;
2673 else /* too many, take last one */
2674 bot [1] = *sp;
2675
2676 SP = bot + 1;
2677
2678 PUTBACK;
2679 }
2680
2681 return NORMAL;
2682}
2683
2684static void
2685api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2686{
2687 int i;
2688 SV **arg = PL_stack_base + ax;
2689 int items = PL_stack_sp - arg + 1;
2690
2691 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2692
2693 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2694 && PL_op->op_ppaddr != pp_slf)
2695 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2696
2697 CvFLAGS (cv) |= CVf_SLF;
2698 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2699 slf_cv = cv;
2700
2701 /* we patch the op, and then re-run the whole call */
2702 /* we have to put the same argument on the stack for this to work */
2703 /* and this will be done by pp_restore */
2704 slf_restore.op_next = (OP *)&slf_restore;
2705 slf_restore.op_type = OP_CUSTOM;
2706 slf_restore.op_ppaddr = pp_restore;
2707 slf_restore.op_first = PL_op;
2708
2709 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2710
2711 if (PL_op->op_flags & OPf_STACKED)
2712 {
2713 if (items > slf_arga)
2714 {
2715 slf_arga = items;
2716 Safefree (slf_argv);
2717 New (0, slf_argv, slf_arga, SV *);
2718 }
2719
2720 slf_argc = items;
2721
2722 for (i = 0; i < items; ++i)
2723 slf_argv [i] = SvREFCNT_inc (arg [i]);
2724 }
2725 else
2726 slf_argc = 0;
2727
2728 PL_op->op_ppaddr = pp_slf;
2729 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2730
2731 PL_op = (OP *)&slf_restore;
2732}
2733
2734/*****************************************************************************/
2735/* dynamic wind */
2736
2737static void
2738on_enterleave_call (pTHX_ SV *cb)
2739{
2740 dSP;
2741
2742 PUSHSTACK;
2743
2744 PUSHMARK (SP);
2745 PUTBACK;
2746 call_sv (cb, G_VOID | G_DISCARD);
2747 SPAGAIN;
2748
2749 POPSTACK;
2750}
2751
2752static SV *
2753coro_avp_pop_and_free (pTHX_ AV **avp)
2754{
2755 AV *av = *avp;
2756 SV *res = av_pop (av);
2757
2758 if (AvFILLp (av) < 0)
2759 {
2760 *avp = 0;
2761 SvREFCNT_dec (av);
2762 }
2763
2764 return res;
2765}
2766
2767static void
2768coro_pop_on_enter (pTHX_ void *coro)
2769{
2770 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2771 SvREFCNT_dec (cb);
2772}
2773
2774static void
2775coro_pop_on_leave (pTHX_ void *coro)
2776{
2777 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2778 on_enterleave_call (aTHX_ sv_2mortal (cb));
2779}
2780
2781/*****************************************************************************/
2782/* PerlIO::cede */
2783
2784typedef struct
2785{
2786 PerlIOBuf base;
2787 NV next, every;
2788} PerlIOCede;
2789
2790static IV ecb_cold
2791PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2792{
2793 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2794
2795 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2796 self->next = nvtime () + self->every;
2797
2798 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2799}
2800
2801static SV * ecb_cold
2802PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2803{
2804 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2805
2806 return newSVnv (self->every);
2807}
2808
2809static IV
2810PerlIOCede_flush (pTHX_ PerlIO *f)
2811{
2812 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2813 double now = nvtime ();
2814
2815 if (now >= self->next)
2816 {
2817 api_cede (aTHX);
2818 self->next = now + self->every;
2819 }
2820
2821 return PerlIOBuf_flush (aTHX_ f);
2822}
2823
2824static PerlIO_funcs PerlIO_cede =
2825{
2826 sizeof(PerlIO_funcs),
2827 "cede",
2828 sizeof(PerlIOCede),
2829 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2830 PerlIOCede_pushed,
2831 PerlIOBuf_popped,
2832 PerlIOBuf_open,
2833 PerlIOBase_binmode,
2834 PerlIOCede_getarg,
2835 PerlIOBase_fileno,
2836 PerlIOBuf_dup,
2837 PerlIOBuf_read,
2838 PerlIOBuf_unread,
2839 PerlIOBuf_write,
2840 PerlIOBuf_seek,
2841 PerlIOBuf_tell,
2842 PerlIOBuf_close,
2843 PerlIOCede_flush,
2844 PerlIOBuf_fill,
2845 PerlIOBase_eof,
2846 PerlIOBase_error,
2847 PerlIOBase_clearerr,
2848 PerlIOBase_setlinebuf,
2849 PerlIOBuf_get_base,
2850 PerlIOBuf_bufsiz,
2851 PerlIOBuf_get_ptr,
2852 PerlIOBuf_get_cnt,
2853 PerlIOBuf_set_ptrcnt,
2854};
2855
2856/*****************************************************************************/
2857/* Coro::Semaphore & Coro::Signal */
2858
2859static SV *
2860coro_waitarray_new (pTHX_ int count)
2861{
2862 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2863 AV *av = newAV ();
2864 SV **ary;
2865
2866 /* unfortunately, building manually saves memory */
2867 Newx (ary, 2, SV *);
2868 AvALLOC (av) = ary;
2869#if PERL_VERSION_ATLEAST (5,10,0)
2870 AvARRAY (av) = ary;
2871#else
2872 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2873 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2874 SvPVX ((SV *)av) = (char *)ary;
2875#endif
2876 AvMAX (av) = 1;
2877 AvFILLp (av) = 0;
2878 ary [0] = newSViv (count);
2879
2880 return newRV_noinc ((SV *)av);
2881}
2882
2883/* semaphore */
2884
2885static void
2886coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2887{
2888 SV *count_sv = AvARRAY (av)[0];
2889 IV count = SvIVX (count_sv);
2890
2891 count += adjust;
2892 SvIVX (count_sv) = count;
2893
2894 /* now wake up as many waiters as are expected to lock */
2895 while (count > 0 && AvFILLp (av) > 0)
2896 {
2897 SV *cb;
2898
2899 /* swap first two elements so we can shift a waiter */
2900 AvARRAY (av)[0] = AvARRAY (av)[1];
2901 AvARRAY (av)[1] = count_sv;
2902 cb = av_shift (av);
2903
2904 if (SvOBJECT (cb))
2905 {
2906 api_ready (aTHX_ cb);
2907 --count;
2908 }
2909 else if (SvTYPE (cb) == SVt_PVCV)
2910 {
2911 dSP;
2912 PUSHMARK (SP);
2913 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2914 PUTBACK;
2915 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2916 }
2917
2918 SvREFCNT_dec (cb);
2919 }
2920}
2921
2922static void
2923coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2924{
2925 /* call $sem->adjust (0) to possibly wake up some other waiters */
2926 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2927}
2928
2929static int
2930slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2931{
2932 AV *av = (AV *)frame->data;
2933 SV *count_sv = AvARRAY (av)[0];
2934 SV *coro_hv = SvRV (coro_current);
2935
2936 /* if we are about to throw, don't actually acquire the lock, just throw */
2937 if (CORO_THROW)
2938 return 0;
2939 else if (SvIVX (count_sv) > 0)
2940 {
2941 frame->destroy = 0;
2942
2943 if (acquire)
2944 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2945 else
2946 coro_semaphore_adjust (aTHX_ av, 0);
2947
2948 return 0;
2949 }
2950 else
2951 {
2952 int i;
2953 /* if we were woken up but can't down, we look through the whole */
2954 /* waiters list and only add us if we aren't in there already */
2955 /* this avoids some degenerate memory usage cases */
2956 for (i = AvFILLp (av); i > 0; --i) // i > 0 is not an off-by-one bug
2957 if (AvARRAY (av)[i] == coro_hv)
2958 return 1;
2959
2960 av_push (av, SvREFCNT_inc (coro_hv));
2961 return 1;
2962 }
2963}
2964
2965static int
2966slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2967{
2968 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2969}
2970
2971static int
2972slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2973{
2974 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2975}
2976
2977static void
2978slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2979{
2980 AV *av = (AV *)SvRV (arg [0]);
2981
2982 if (SvIVX (AvARRAY (av)[0]) > 0)
2983 {
2984 frame->data = (void *)av;
2985 frame->prepare = prepare_nop;
2986 }
2987 else
2988 {
2989 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2990
2991 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2992 frame->prepare = prepare_schedule;
2993 /* to avoid race conditions when a woken-up coro gets terminated */
2994 /* we arrange for a temporary on_destroy that calls adjust (0) */
2995 frame->destroy = coro_semaphore_destroy;
2996 }
2997}
2998
2999static void
3000slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3001{
3002 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3003 frame->check = slf_check_semaphore_down;
3004}
3005
3006static void
3007slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3008{
3009 if (items >= 2)
3010 {
3011 /* callback form */
3012 AV *av = (AV *)SvRV (arg [0]);
3013 SV *cb_cv = s_get_cv_croak (arg [1]);
3014
3015 av_push (av, SvREFCNT_inc_NN (cb_cv));
3016
3017 if (SvIVX (AvARRAY (av)[0]) > 0)
3018 coro_semaphore_adjust (aTHX_ av, 0);
3019
3020 frame->prepare = prepare_nop;
3021 frame->check = slf_check_nop;
3022 }
3023 else
3024 {
3025 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3026 frame->check = slf_check_semaphore_wait;
3027 }
3028}
3029
3030/* signal */
3031
3032static void
3033coro_signal_wake (pTHX_ AV *av, int count)
3034{
3035 SvIVX (AvARRAY (av)[0]) = 0;
3036
3037 /* now signal count waiters */
3038 while (count > 0 && AvFILLp (av) > 0)
3039 {
3040 SV *cb;
3041
3042 /* swap first two elements so we can shift a waiter */
3043 cb = AvARRAY (av)[0];
3044 AvARRAY (av)[0] = AvARRAY (av)[1];
3045 AvARRAY (av)[1] = cb;
3046
3047 cb = av_shift (av);
3048
3049 if (SvTYPE (cb) == SVt_PVCV)
3050 {
3051 dSP;
3052 PUSHMARK (SP);
3053 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3054 PUTBACK;
3055 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3056 }
3057 else
3058 {
3059 api_ready (aTHX_ cb);
3060 sv_setiv (cb, 0); /* signal waiter */
3061 }
3062
3063 SvREFCNT_dec (cb);
3064
3065 --count;
3066 }
3067}
3068
3069static int
3070slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3071{
3072 /* if we are about to throw, also stop waiting */
3073 return SvROK ((SV *)frame->data) && !CORO_THROW;
3074}
3075
3076static void
3077slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3078{
3079 AV *av = (AV *)SvRV (arg [0]);
3080
3081 if (items >= 2)
3082 {
3083 SV *cb_cv = s_get_cv_croak (arg [1]);
3084 av_push (av, SvREFCNT_inc_NN (cb_cv));
3085
3086 if (SvIVX (AvARRAY (av)[0]))
3087 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3088
3089 frame->prepare = prepare_nop;
3090 frame->check = slf_check_nop;
3091 }
3092 else if (SvIVX (AvARRAY (av)[0]))
3093 {
3094 SvIVX (AvARRAY (av)[0]) = 0;
3095 frame->prepare = prepare_nop;
3096 frame->check = slf_check_nop;
3097 }
3098 else
3099 {
3100 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3101
3102 av_push (av, waiter);
3103
3104 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3105 frame->prepare = prepare_schedule;
3106 frame->check = slf_check_signal_wait;
3107 }
3108}
3109
3110/*****************************************************************************/
3111/* Coro::AIO */
3112
3113#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3114
3115/* helper storage struct */
3116struct io_state
3117{
3118 int errorno;
3119 I32 laststype; /* U16 in 5.10.0 */
3120 int laststatval;
3121 Stat_t statcache;
3122};
3123
3124static void
3125coro_aio_callback (pTHX_ CV *cv)
3126{
3127 dXSARGS;
3128 AV *state = (AV *)S_GENSUB_ARG;
3129 SV *coro = av_pop (state);
3130 SV *data_sv = newSV (sizeof (struct io_state));
3131
3132 av_extend (state, items - 1);
3133
3134 sv_upgrade (data_sv, SVt_PV);
3135 SvCUR_set (data_sv, sizeof (struct io_state));
3136 SvPOK_only (data_sv);
3137
3138 {
3139 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3140
3141 data->errorno = errno;
3142 data->laststype = PL_laststype;
3143 data->laststatval = PL_laststatval;
3144 data->statcache = PL_statcache;
3145 }
3146
3147 /* now build the result vector out of all the parameters and the data_sv */
3148 {
3149 int i;
3150
3151 for (i = 0; i < items; ++i)
3152 av_push (state, SvREFCNT_inc_NN (ST (i)));
3153 }
3154
3155 av_push (state, data_sv);
3156
3157 api_ready (aTHX_ coro);
3158 SvREFCNT_dec (coro);
3159 SvREFCNT_dec ((AV *)state);
3160}
3161
3162static int
3163slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3164{
3165 AV *state = (AV *)frame->data;
3166
3167 /* if we are about to throw, return early */
3168 /* this does not cancel the aio request, but at least */
3169 /* it quickly returns */
3170 if (CORO_THROW)
3171 return 0;
3172
3173 /* one element that is an RV? repeat! */
3174 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3175 return 1;
3176
3177 /* restore status */
3178 {
3179 SV *data_sv = av_pop (state);
3180 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3181
3182 errno = data->errorno;
3183 PL_laststype = data->laststype;
3184 PL_laststatval = data->laststatval;
3185 PL_statcache = data->statcache;
3186
3187 SvREFCNT_dec (data_sv);
3188 }
3189
3190 /* push result values */
3191 {
3192 dSP;
3193 int i;
3194
3195 EXTEND (SP, AvFILLp (state) + 1);
3196 for (i = 0; i <= AvFILLp (state); ++i)
3197 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3198
3199 PUTBACK;
3200 }
3201
3202 return 0;
3203}
3204
3205static void
3206slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3207{
3208 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3209 SV *coro_hv = SvRV (coro_current);
3210 struct coro *coro = SvSTATE_hv (coro_hv);
3211
3212 /* put our coroutine id on the state arg */
3213 av_push (state, SvREFCNT_inc_NN (coro_hv));
3214
3215 /* first see whether we have a non-zero priority and set it as AIO prio */
3216 if (coro->prio)
3217 {
3218 dSP;
3219
3220 static SV *prio_cv;
3221 static SV *prio_sv;
3222
3223 if (ecb_expect_false (!prio_cv))
3224 {
3225 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3226 prio_sv = newSViv (0);
3227 }
3228
3229 PUSHMARK (SP);
3230 sv_setiv (prio_sv, coro->prio);
3231 XPUSHs (prio_sv);
3232
3233 PUTBACK;
3234 call_sv (prio_cv, G_VOID | G_DISCARD);
3235 }
3236
3237 /* now call the original request */
3238 {
3239 dSP;
3240 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3241 int i;
3242
3243 PUSHMARK (SP);
3244
3245 /* first push all args to the stack */
3246 EXTEND (SP, items + 1);
3247
3248 for (i = 0; i < items; ++i)
3249 PUSHs (arg [i]);
3250
3251 /* now push the callback closure */
3252 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3253
3254 /* now call the AIO function - we assume our request is uncancelable */
3255 PUTBACK;
3256 call_sv ((SV *)req, G_VOID | G_DISCARD);
3257 }
3258
3259 /* now that the request is going, we loop till we have a result */
3260 frame->data = (void *)state;
3261 frame->prepare = prepare_schedule;
3262 frame->check = slf_check_aio_req;
3263}
3264
3265static void
3266coro_aio_req_xs (pTHX_ CV *cv)
3267{
3268 dXSARGS;
3269
3270 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3271
3272 XSRETURN_EMPTY;
3273}
3274
3275/*****************************************************************************/
3276
3277#if CORO_CLONE
3278# include "clone.c"
3279#endif
3280
3281/*****************************************************************************/
3282
3283static SV *
3284coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3285{
3286 SV *coro_sv;
3287 struct coro *coro;
3288 MAGIC *mg;
3289 HV *hv;
3290 SV *cb;
3291 int i;
3292
3293 if (argc > 0)
3294 {
3295 cb = s_get_cv_croak (argv [0]);
3296
3297 if (!is_coro)
3298 {
3299 if (CvISXSUB (cb))
3300 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3301
3302 if (!CvROOT (cb))
3303 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3304 }
3305 }
3306
3307 Newz (0, coro, 1, struct coro);
3308 coro->args = newAV ();
3309 coro->flags = CF_NEW;
3310
3311 if (coro_first) coro_first->prev = coro;
3312 coro->next = coro_first;
3313 coro_first = coro;
3314
3315 coro->hv = hv = newHV ();
3316 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3317 mg->mg_flags |= MGf_DUP;
3318 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3319
3320 if (argc > 0)
3321 {
3322 av_extend (coro->args, argc + is_coro - 1);
3323
3324 if (is_coro)
3325 {
3326 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3327 cb = (SV *)cv_coro_run;
3328 }
3329
3330 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3331
3332 for (i = 1; i < argc; i++)
3333 av_push (coro->args, newSVsv (argv [i]));
3334 }
3335
3336 return coro_sv;
3337}
3338
3339#ifndef __cplusplus
3340ecb_cold XS(boot_Coro__State);
3341#endif
3342
3343#if CORO_JIT
3344
3345static void ecb_noinline ecb_cold
3346pushav_3uv (pTHX_ UV a, UV b, UV c)
3347{
3348 dSP;
3349 AV *av = newAV ();
3350
3351 av_store (av, 2, newSVuv (c));
3352 av_store (av, 1, newSVuv (b));
3353 av_store (av, 0, newSVuv (a));
3354
3355 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3356
3357 PUTBACK;
3358}
3359
3360static void ecb_noinline ecb_cold
3361jit_init (pTHX)
3362{
3363 dSP;
3364 SV *load, *save;
3365 char *map_base;
3366 char *load_ptr, *save_ptr;
3367 STRLEN load_len, save_len;
3368 int count;
3369
3370 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3371
3372 PUSHMARK (SP);
3373#define VARx(name,expr,type) pushav_3uv (aTHX_ (UV)&(expr), offsetof (perl_slots, name), sizeof (type));
3374# include "state.h"
3375#undef VARx
3376 count = call_pv ("Coro::State::_jit", G_ARRAY);
3377 SPAGAIN;
3378
3379 save = POPs; save_ptr = SvPVbyte (save, save_len);
3380 load = POPs; load_ptr = SvPVbyte (load, load_len);
3381
3382 map_base = mmap (0, load_len + save_len + 16, PROT_EXEC | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3383
3384 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3385
3386 load_perl_slots = (load_save_perl_slots_type)map_base;
3387 memcpy (map_base, load_ptr, load_len);
3388
3389 map_base += (load_len + 15) & ~15;
3390
3391 save_perl_slots = (load_save_perl_slots_type)map_base;
3392 memcpy (map_base, save_ptr, save_len);
3393
3394 PUTBACK;
3395 eval_pv ("undef &Coro::State::_jit", 1);
3396}
3397
3398#endif
1394 3399
1395MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 3400MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1396 3401
1397PROTOTYPES: DISABLE 3402PROTOTYPES: DISABLE
1398 3403
1399BOOT: 3404BOOT:
1400{ 3405{
1401#ifdef USE_ITHREADS 3406#ifdef USE_ITHREADS
1402 MUTEX_INIT (&coro_mutex); 3407# if CORO_PTHREAD
3408 coro_thx = PERL_GET_CONTEXT;
3409# endif
1403#endif 3410#endif
1404 BOOT_PAGESIZE; 3411 BOOT_PAGESIZE;
1405 3412
3413 /* perl defines these to check for existance first, but why it doesn't */
3414 /* just create them one at init time is not clear to me, except for */
3415 /* programs trying to delete them, but... */
3416 /* anyway, we declare this as invalid and make sure they are initialised here */
3417 DEFSV;
3418 ERRSV;
3419
3420 cctx_current = cctx_new_empty ();
3421
1406 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 3422 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1407 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 3423 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3424
3425 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3426 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3427 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3428
3429 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3430 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3431 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1408 3432
1409 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3433 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1410 3434
1411 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE)); 3435 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1412 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB)); 3436 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
… …
1417 main_top_env = PL_top_env; 3441 main_top_env = PL_top_env;
1418 3442
1419 while (main_top_env->je_prev) 3443 while (main_top_env->je_prev)
1420 main_top_env = main_top_env->je_prev; 3444 main_top_env = main_top_env->je_prev;
1421 3445
3446 {
3447 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3448
3449 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3450 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3451
3452 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3453 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3454 }
3455
1422 coroapi.ver = CORO_API_VERSION; 3456 coroapi.ver = CORO_API_VERSION;
3457 coroapi.rev = CORO_API_REVISION;
3458
1423 coroapi.transfer = api_transfer; 3459 coroapi.transfer = api_transfer;
1424 3460
3461 coroapi.sv_state = SvSTATE_;
3462 coroapi.execute_slf = api_execute_slf;
3463 coroapi.prepare_nop = prepare_nop;
3464 coroapi.prepare_schedule = prepare_schedule;
3465 coroapi.prepare_cede = prepare_cede;
3466 coroapi.prepare_cede_notself = prepare_cede_notself;
3467
3468 time_init (aTHX);
3469
1425 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3470 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3471#if CORO_JIT
3472 PUTBACK;
3473 jit_init (aTHX);
3474 SPAGAIN;
3475#endif
1426} 3476}
1427 3477
1428SV * 3478SV *
1429new (char *klass, ...) 3479new (SV *klass, ...)
3480 ALIAS:
3481 Coro::new = 1
1430 CODE: 3482 CODE:
1431{ 3483 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1432 struct coro *coro;
1433 HV *hv;
1434 int i;
1435
1436 Newz (0, coro, 1, struct coro);
1437 coro->args = newAV ();
1438 coro->flags = CF_NEW;
1439
1440 if (coro_first) coro_first->prev = coro;
1441 coro->next = coro_first;
1442 coro_first = coro;
1443
1444 coro->hv = hv = newHV ();
1445 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1446 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1447
1448 av_extend (coro->args, items - 1);
1449 for (i = 1; i < items; i++)
1450 av_push (coro->args, newSVsv (ST (i)));
1451}
1452 OUTPUT:
1453 RETVAL
1454
1455# these not obviously related functions are all rolled into the same xs
1456# function to increase chances that they all will call transfer with the same
1457# stack offset
1458void
1459_set_stacklevel (...)
1460 ALIAS:
1461 Coro::State::transfer = 1
1462 Coro::schedule = 2
1463 Coro::cede = 3
1464 Coro::cede_notself = 4
1465 CODE:
1466{
1467 struct transfer_args ta;
1468
1469 switch (ix)
1470 {
1471 case 0:
1472 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1473 ta.next = 0;
1474 break;
1475
1476 case 1:
1477 if (items != 2)
1478 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1479
1480 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1481 break;
1482
1483 case 2:
1484 prepare_schedule (aTHX_ &ta);
1485 break;
1486
1487 case 3:
1488 prepare_cede (aTHX_ &ta);
1489 break;
1490
1491 case 4:
1492 if (!prepare_cede_notself (aTHX_ &ta))
1493 XSRETURN_EMPTY;
1494
1495 break;
1496 }
1497
1498 BARRIER;
1499 TRANSFER (ta);
1500
1501 if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
1502 XSRETURN_YES;
1503}
1504
1505bool
1506_destroy (SV *coro_sv)
1507 CODE:
1508 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1509 OUTPUT: 3484 OUTPUT:
1510 RETVAL 3485 RETVAL
1511 3486
1512void 3487void
3488transfer (...)
3489 PROTOTYPE: $$
3490 CODE:
3491 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3492
3493void
1513_exit (code) 3494_exit (int code)
1514 int code
1515 PROTOTYPE: $ 3495 PROTOTYPE: $
1516 CODE: 3496 CODE:
1517 _exit (code); 3497 _exit (code);
1518 3498
3499SV *
3500clone (Coro::State coro)
3501 CODE:
3502{
3503#if CORO_CLONE
3504 struct coro *ncoro = coro_clone (aTHX_ coro);
3505 MAGIC *mg;
3506 /* TODO: too much duplication */
3507 ncoro->hv = newHV ();
3508 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3509 mg->mg_flags |= MGf_DUP;
3510 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3511#else
3512 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3513#endif
3514}
3515 OUTPUT:
3516 RETVAL
3517
1519int 3518int
1520cctx_stacksize (int new_stacksize = 0) 3519cctx_stacksize (int new_stacksize = 0)
3520 PROTOTYPE: ;$
1521 CODE: 3521 CODE:
1522 RETVAL = coro_stacksize; 3522 RETVAL = cctx_stacksize;
1523 if (new_stacksize) 3523 if (new_stacksize)
3524 {
1524 coro_stacksize = new_stacksize; 3525 cctx_stacksize = new_stacksize;
3526 ++cctx_gen;
3527 }
1525 OUTPUT: 3528 OUTPUT:
1526 RETVAL 3529 RETVAL
1527 3530
1528int 3531int
3532cctx_max_idle (int max_idle = 0)
3533 PROTOTYPE: ;$
3534 CODE:
3535 RETVAL = cctx_max_idle;
3536 if (max_idle > 1)
3537 cctx_max_idle = max_idle;
3538 OUTPUT:
3539 RETVAL
3540
3541int
1529cctx_count () 3542cctx_count ()
3543 PROTOTYPE:
1530 CODE: 3544 CODE:
1531 RETVAL = cctx_count; 3545 RETVAL = cctx_count;
1532 OUTPUT: 3546 OUTPUT:
1533 RETVAL 3547 RETVAL
1534 3548
1535int 3549int
1536cctx_idle () 3550cctx_idle ()
3551 PROTOTYPE:
1537 CODE: 3552 CODE:
1538 RETVAL = cctx_idle; 3553 RETVAL = cctx_idle;
1539 OUTPUT: 3554 OUTPUT:
1540 RETVAL 3555 RETVAL
1541 3556
1542void 3557void
1543list () 3558list ()
3559 PROTOTYPE:
1544 PPCODE: 3560 PPCODE:
1545{ 3561{
1546 struct coro *coro; 3562 struct coro *coro;
1547 for (coro = coro_first; coro; coro = coro->next) 3563 for (coro = coro_first; coro; coro = coro->next)
1548 if (coro->hv) 3564 if (coro->hv)
… …
1553call (Coro::State coro, SV *coderef) 3569call (Coro::State coro, SV *coderef)
1554 ALIAS: 3570 ALIAS:
1555 eval = 1 3571 eval = 1
1556 CODE: 3572 CODE:
1557{ 3573{
1558 if (coro->mainstack) 3574 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1559 { 3575 {
1560 struct coro temp; 3576 struct coro *current = SvSTATE_current;
1561 Zero (&temp, 1, struct coro); 3577 struct CoroSLF slf_save;
1562 3578
1563 if (!(coro->flags & CF_RUNNING)) 3579 if (current != coro)
1564 { 3580 {
3581 PUTBACK;
1565 save_perl (aTHX_ &temp); 3582 save_perl (aTHX_ current);
1566 load_perl (aTHX_ coro); 3583 load_perl (aTHX_ coro);
3584 /* the coro is most likely in an active SLF call.
3585 * while not strictly required (the code we execute is
3586 * not allowed to call any SLF functions), it's cleaner
3587 * to reinitialise the slf_frame and restore it later.
3588 * This might one day allow us to actually do SLF calls
3589 * from code executed here.
3590 */
3591 slf_save = slf_frame;
3592 slf_frame.prepare = 0;
3593 SPAGAIN;
1567 } 3594 }
1568 3595
1569 { 3596 PUSHSTACK;
1570 dSP; 3597
1571 ENTER;
1572 SAVETMPS;
1573 PUSHMARK (SP); 3598 PUSHMARK (SP);
1574 PUTBACK; 3599 PUTBACK;
3600
1575 if (ix) 3601 if (ix)
1576 eval_sv (coderef, 0); 3602 eval_sv (coderef, 0);
1577 else 3603 else
1578 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3604 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3605
3606 POPSTACK;
1579 SPAGAIN; 3607 SPAGAIN;
1580 FREETMPS;
1581 LEAVE;
1582 PUTBACK;
1583 }
1584 3608
1585 if (!(coro->flags & CF_RUNNING)) 3609 if (current != coro)
1586 { 3610 {
3611 PUTBACK;
3612 slf_frame = slf_save;
1587 save_perl (aTHX_ coro); 3613 save_perl (aTHX_ coro);
1588 load_perl (aTHX_ &temp); 3614 load_perl (aTHX_ current);
3615 SPAGAIN;
1589 } 3616 }
1590 } 3617 }
1591} 3618}
1592 3619
1593SV * 3620SV *
… …
1595 PROTOTYPE: $ 3622 PROTOTYPE: $
1596 ALIAS: 3623 ALIAS:
1597 is_ready = CF_READY 3624 is_ready = CF_READY
1598 is_running = CF_RUNNING 3625 is_running = CF_RUNNING
1599 is_new = CF_NEW 3626 is_new = CF_NEW
1600 is_destroyed = CF_DESTROYED 3627 is_destroyed = CF_ZOMBIE
3628 is_zombie = CF_ZOMBIE
3629 is_suspended = CF_SUSPENDED
1601 CODE: 3630 CODE:
1602 RETVAL = boolSV (coro->flags & ix); 3631 RETVAL = boolSV (coro->flags & ix);
1603 OUTPUT: 3632 OUTPUT:
1604 RETVAL 3633 RETVAL
1605 3634
1606void 3635void
3636throw (Coro::State self, SV *exception = &PL_sv_undef)
3637 PROTOTYPE: $;$
3638 CODE:
3639{
3640 struct coro *current = SvSTATE_current;
3641 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
3642 SvREFCNT_dec (*exceptionp);
3643 SvGETMAGIC (exception);
3644 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3645}
3646
3647void
1607api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3648api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3649 PROTOTYPE: $;$
3650 C_ARGS: aTHX_ coro, flags
1608 3651
1609SV * 3652SV *
1610has_stack (Coro::State coro) 3653has_cctx (Coro::State coro)
1611 PROTOTYPE: $ 3654 PROTOTYPE: $
1612 CODE: 3655 CODE:
1613 RETVAL = boolSV (!!coro->cctx); 3656 /* maybe manage the running flag differently */
3657 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1614 OUTPUT: 3658 OUTPUT:
1615 RETVAL 3659 RETVAL
1616 3660
1617int 3661int
1618is_traced (Coro::State coro) 3662is_traced (Coro::State coro)
… …
1620 CODE: 3664 CODE:
1621 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3665 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1622 OUTPUT: 3666 OUTPUT:
1623 RETVAL 3667 RETVAL
1624 3668
1625IV 3669UV
1626rss (Coro::State coro) 3670rss (Coro::State coro)
1627 PROTOTYPE: $ 3671 PROTOTYPE: $
1628 ALIAS: 3672 ALIAS:
1629 usecount = 1 3673 usecount = 1
1630 CODE: 3674 CODE:
… …
1634 case 1: RETVAL = coro->usecount; break; 3678 case 1: RETVAL = coro->usecount; break;
1635 } 3679 }
1636 OUTPUT: 3680 OUTPUT:
1637 RETVAL 3681 RETVAL
1638 3682
3683void
3684force_cctx ()
3685 PROTOTYPE:
3686 CODE:
3687 cctx_current->idle_sp = 0;
3688
3689void
3690swap_defsv (Coro::State self)
3691 PROTOTYPE: $
3692 ALIAS:
3693 swap_defav = 1
3694 CODE:
3695 if (!self->slot)
3696 croak ("cannot swap state with coroutine that has no saved state,");
3697 else
3698 {
3699 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3700 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3701
3702 SV *tmp = *src; *src = *dst; *dst = tmp;
3703 }
3704
3705void
3706cancel (Coro::State self)
3707 CODE:
3708 coro_state_destroy (aTHX_ self);
3709
3710SV *
3711enable_times (int enabled = enable_times)
3712 CODE:
3713{
3714 RETVAL = boolSV (enable_times);
3715
3716 if (enabled != enable_times)
3717 {
3718 enable_times = enabled;
3719
3720 coro_times_update ();
3721 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3722 }
3723}
3724 OUTPUT:
3725 RETVAL
3726
3727void
3728times (Coro::State self)
3729 PPCODE:
3730{
3731 struct coro *current = SvSTATE (coro_current);
3732
3733 if (ecb_expect_false (current == self))
3734 {
3735 coro_times_update ();
3736 coro_times_add (SvSTATE (coro_current));
3737 }
3738
3739 EXTEND (SP, 2);
3740 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3741 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3742
3743 if (ecb_expect_false (current == self))
3744 coro_times_sub (SvSTATE (coro_current));
3745}
3746
3747void
3748swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3749 CODE:
3750{
3751 struct coro *current = SvSTATE_current;
3752
3753 if (current == coro)
3754 SWAP_SVS (current);
3755
3756 if (!coro->swap_sv)
3757 coro->swap_sv = newAV ();
3758
3759 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3760 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3761
3762 if (current == coro)
3763 SWAP_SVS (current);
3764}
3765
1639 3766
1640MODULE = Coro::State PACKAGE = Coro 3767MODULE = Coro::State PACKAGE = Coro
1641 3768
1642BOOT: 3769BOOT:
1643{ 3770{
1644 int i;
1645
1646 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE); 3771 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1647 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE); 3772 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3773 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3774 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1648 av_async_pool = get_av ("Coro::async_pool", TRUE); 3775 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3776 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3777 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3778 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1649 3779
1650 coro_current = get_sv ("Coro::current", FALSE); 3780 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1651 SvREADONLY_on (coro_current); 3781 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
1652 3782 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3783 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3784
1653 coro_stash = gv_stashpv ("Coro", TRUE); 3785 coro_stash = gv_stashpv ("Coro", TRUE);
1654 3786
1655 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3787 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1656 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3788 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1657 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3789 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1658 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3790 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1659 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3791 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1660 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3792 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1661
1662 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1663 coro_ready[i] = newAV ();
1664 3793
1665 { 3794 {
1666 SV *sv = perl_get_sv("Coro::API", 1); 3795 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1667 3796
1668 coroapi.schedule = api_schedule; 3797 coroapi.schedule = api_schedule;
3798 coroapi.schedule_to = api_schedule_to;
1669 coroapi.cede = api_cede; 3799 coroapi.cede = api_cede;
1670 coroapi.cede_notself = api_cede_notself; 3800 coroapi.cede_notself = api_cede_notself;
1671 coroapi.ready = api_ready; 3801 coroapi.ready = api_ready;
1672 coroapi.is_ready = api_is_ready; 3802 coroapi.is_ready = api_is_ready;
1673 coroapi.nready = &coro_nready; 3803 coroapi.nready = coro_nready;
1674 coroapi.current = coro_current; 3804 coroapi.current = coro_current;
1675 3805
1676 GCoroAPI = &coroapi; 3806 /*GCoroAPI = &coroapi;*/
1677 sv_setiv (sv, (IV)&coroapi); 3807 sv_setiv (sv, (IV)&coroapi);
1678 SvREADONLY_on (sv); 3808 SvREADONLY_on (sv);
1679 } 3809 }
1680} 3810}
3811
3812SV *
3813async (...)
3814 PROTOTYPE: &@
3815 CODE:
3816 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3817 api_ready (aTHX_ RETVAL);
3818 OUTPUT:
3819 RETVAL
3820
3821void
3822_destroy (Coro::State coro)
3823 CODE:
3824 /* used by the manager thread */
3825 coro_state_destroy (aTHX_ coro);
3826
3827void
3828on_destroy (Coro::State coro, SV *cb)
3829 CODE:
3830 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3831
3832void
3833join (...)
3834 CODE:
3835 CORO_EXECUTE_SLF_XS (slf_init_join);
3836
3837void
3838terminate (...)
3839 CODE:
3840 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3841
3842void
3843cancel (...)
3844 CODE:
3845 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3846
3847int
3848safe_cancel (Coro::State self, ...)
3849 C_ARGS: aTHX_ self, &ST (1), items - 1
3850
3851void
3852schedule (...)
3853 CODE:
3854 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3855
3856void
3857schedule_to (...)
3858 CODE:
3859 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3860
3861void
3862cede_to (...)
3863 CODE:
3864 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3865
3866void
3867cede (...)
3868 CODE:
3869 CORO_EXECUTE_SLF_XS (slf_init_cede);
3870
3871void
3872cede_notself (...)
3873 CODE:
3874 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1681 3875
1682void 3876void
1683_set_current (SV *current) 3877_set_current (SV *current)
1684 PROTOTYPE: $ 3878 PROTOTYPE: $
1685 CODE: 3879 CODE:
1686 SvREFCNT_dec (SvRV (coro_current)); 3880 SvREFCNT_dec (SvRV (coro_current));
1687 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3881 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3882
3883void
3884_set_readyhook (SV *hook)
3885 PROTOTYPE: $
3886 CODE:
3887 SvREFCNT_dec (coro_readyhook);
3888 SvGETMAGIC (hook);
3889 if (SvOK (hook))
3890 {
3891 coro_readyhook = newSVsv (hook);
3892 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3893 }
3894 else
3895 {
3896 coro_readyhook = 0;
3897 CORO_READYHOOK = 0;
3898 }
1688 3899
1689int 3900int
1690prio (Coro::State coro, int newprio = 0) 3901prio (Coro::State coro, int newprio = 0)
3902 PROTOTYPE: $;$
1691 ALIAS: 3903 ALIAS:
1692 nice = 1 3904 nice = 1
1693 CODE: 3905 CODE:
1694{ 3906{
1695 RETVAL = coro->prio; 3907 RETVAL = coro->prio;
… …
1697 if (items > 1) 3909 if (items > 1)
1698 { 3910 {
1699 if (ix) 3911 if (ix)
1700 newprio = coro->prio - newprio; 3912 newprio = coro->prio - newprio;
1701 3913
1702 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3914 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1703 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3915 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1704 3916
1705 coro->prio = newprio; 3917 coro->prio = newprio;
1706 } 3918 }
1707} 3919}
1708 OUTPUT: 3920 OUTPUT:
… …
1710 3922
1711SV * 3923SV *
1712ready (SV *self) 3924ready (SV *self)
1713 PROTOTYPE: $ 3925 PROTOTYPE: $
1714 CODE: 3926 CODE:
1715 RETVAL = boolSV (api_ready (self)); 3927 RETVAL = boolSV (api_ready (aTHX_ self));
1716 OUTPUT: 3928 OUTPUT:
1717 RETVAL 3929 RETVAL
1718 3930
1719int 3931int
1720nready (...) 3932nready (...)
… …
1722 CODE: 3934 CODE:
1723 RETVAL = coro_nready; 3935 RETVAL = coro_nready;
1724 OUTPUT: 3936 OUTPUT:
1725 RETVAL 3937 RETVAL
1726 3938
1727# for async_pool speedup
1728void 3939void
1729_pool_1 (SV *cb) 3940suspend (Coro::State self)
3941 PROTOTYPE: $
1730 CODE: 3942 CODE:
1731{ 3943 self->flags |= CF_SUSPENDED;
1732 struct coro *coro = SvSTATE (coro_current);
1733 HV *hv = (HV *)SvRV (coro_current);
1734 AV *defav = GvAV (PL_defgv);
1735 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1736 AV *invoke_av;
1737 int i, len;
1738 3944
1739 if (!invoke) 3945void
1740 croak ("\3terminate\2\n"); 3946resume (Coro::State self)
3947 PROTOTYPE: $
3948 CODE:
3949 self->flags &= ~CF_SUSPENDED;
1741 3950
1742 SvREFCNT_dec (coro->saved_deffh); 3951void
1743 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv); 3952_pool_handler (...)
3953 CODE:
3954 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1744 3955
1745 hv_store (hv, "desc", sizeof ("desc") - 1, 3956void
1746 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 3957async_pool (SV *cv, ...)
3958 PROTOTYPE: &@
3959 PPCODE:
3960{
3961 HV *hv = (HV *)av_pop (av_async_pool);
3962 AV *av = newAV ();
3963 SV *cb = ST (0);
3964 int i;
1747 3965
1748 invoke_av = (AV *)SvRV (invoke); 3966 av_extend (av, items - 2);
1749 len = av_len (invoke_av); 3967 for (i = 1; i < items; ++i)
3968 av_push (av, SvREFCNT_inc_NN (ST (i)));
1750 3969
1751 sv_setsv (cb, AvARRAY (invoke_av)[0]); 3970 if ((SV *)hv == &PL_sv_undef)
1752
1753 if (len > 0)
1754 { 3971 {
1755 av_fill (defav, len - 1); 3972 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
1756 for (i = 0; i < len; ++i) 3973 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
1757 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 3974 SvREFCNT_dec (sv);
1758 } 3975 }
1759 3976
3977 {
3978 struct coro *coro = SvSTATE_hv (hv);
3979
3980 assert (!coro->invoke_cb);
3981 assert (!coro->invoke_av);
3982 coro->invoke_cb = SvREFCNT_inc (cb);
3983 coro->invoke_av = av;
3984 }
3985
3986 api_ready (aTHX_ (SV *)hv);
3987
3988 if (GIMME_V != G_VOID)
3989 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3990 else
1760 SvREFCNT_dec (invoke); 3991 SvREFCNT_dec (hv);
1761} 3992}
1762 3993
1763void 3994SV *
1764_pool_2 (SV *cb) 3995rouse_cb ()
3996 PROTOTYPE:
1765 CODE: 3997 CODE:
1766{ 3998 RETVAL = coro_new_rouse_cb (aTHX);
1767 struct coro *coro = SvSTATE (coro_current);
1768
1769 sv_setsv (cb, &PL_sv_undef);
1770
1771 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1772 coro->saved_deffh = 0;
1773
1774 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1775 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1776 croak ("\3terminate\2\n");
1777
1778 av_clear (GvAV (PL_defgv));
1779 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1780 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1781
1782 coro->prio = 0;
1783
1784 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1785 api_trace (coro_current, 0);
1786
1787 av_push (av_async_pool, newSVsv (coro_current));
1788}
1789
1790
1791MODULE = Coro::State PACKAGE = Coro::AIO
1792
1793SV *
1794_get_state ()
1795 CODE:
1796{
1797 struct io_state *data;
1798
1799 RETVAL = newSV (sizeof (struct io_state));
1800 data = (struct io_state *)SvPVX (RETVAL);
1801 SvCUR_set (RETVAL, sizeof (struct io_state));
1802 SvPOK_only (RETVAL);
1803
1804 data->errorno = errno;
1805 data->laststype = PL_laststype;
1806 data->laststatval = PL_laststatval;
1807 data->statcache = PL_statcache;
1808}
1809 OUTPUT: 3999 OUTPUT:
1810 RETVAL 4000 RETVAL
1811 4001
1812void 4002void
1813_set_state (char *data_) 4003rouse_wait (...)
4004 PROTOTYPE: ;$
4005 PPCODE:
4006 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4007
4008void
4009on_enter (SV *block)
4010 ALIAS:
4011 on_leave = 1
1814 PROTOTYPE: $ 4012 PROTOTYPE: &
1815 CODE: 4013 CODE:
1816{ 4014{
1817 struct io_state *data = (void *)data_; 4015 struct coro *coro = SvSTATE_current;
4016 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1818 4017
1819 errno = data->errorno; 4018 block = s_get_cv_croak (block);
1820 PL_laststype = data->laststype;
1821 PL_laststatval = data->laststatval;
1822 PL_statcache = data->statcache;
1823}
1824 4019
4020 if (!*avp)
4021 *avp = newAV ();
4022
4023 av_push (*avp, SvREFCNT_inc (block));
4024
4025 if (!ix)
4026 on_enterleave_call (aTHX_ block);
4027
4028 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4029 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4030 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4031}
4032
4033
4034MODULE = Coro::State PACKAGE = PerlIO::cede
4035
4036BOOT:
4037 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4038
4039
4040MODULE = Coro::State PACKAGE = Coro::Semaphore
4041
4042SV *
4043new (SV *klass, SV *count = 0)
4044 CODE:
4045{
4046 int semcnt = 1;
4047
4048 if (count)
4049 {
4050 SvGETMAGIC (count);
4051
4052 if (SvOK (count))
4053 semcnt = SvIV (count);
4054 }
4055
4056 RETVAL = sv_bless (
4057 coro_waitarray_new (aTHX_ semcnt),
4058 GvSTASH (CvGV (cv))
4059 );
4060}
4061 OUTPUT:
4062 RETVAL
4063
4064# helper for Coro::Channel and others
4065SV *
4066_alloc (int count)
4067 CODE:
4068 RETVAL = coro_waitarray_new (aTHX_ count);
4069 OUTPUT:
4070 RETVAL
4071
4072SV *
4073count (SV *self)
4074 CODE:
4075 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4076 OUTPUT:
4077 RETVAL
4078
4079void
4080up (SV *self, int adjust = 1)
4081 ALIAS:
4082 adjust = 1
4083 CODE:
4084 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4085
4086void
4087down (...)
4088 CODE:
4089 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4090
4091void
4092wait (...)
4093 CODE:
4094 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4095
4096void
4097try (SV *self)
4098 PPCODE:
4099{
4100 AV *av = (AV *)SvRV (self);
4101 SV *count_sv = AvARRAY (av)[0];
4102 IV count = SvIVX (count_sv);
4103
4104 if (count > 0)
4105 {
4106 --count;
4107 SvIVX (count_sv) = count;
4108 XSRETURN_YES;
4109 }
4110 else
4111 XSRETURN_NO;
4112}
4113
4114void
4115waiters (SV *self)
4116 PPCODE:
4117{
4118 AV *av = (AV *)SvRV (self);
4119 int wcount = AvFILLp (av) + 1 - 1;
4120
4121 if (GIMME_V == G_SCALAR)
4122 XPUSHs (sv_2mortal (newSViv (wcount)));
4123 else
4124 {
4125 int i;
4126 EXTEND (SP, wcount);
4127 for (i = 1; i <= wcount; ++i)
4128 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4129 }
4130}
4131
4132MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4133
4134void
4135_may_delete (SV *sem, int count, int extra_refs)
4136 PPCODE:
4137{
4138 AV *av = (AV *)SvRV (sem);
4139
4140 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4141 && AvFILLp (av) == 0 /* no waiters, just count */
4142 && SvIV (AvARRAY (av)[0]) == count)
4143 XSRETURN_YES;
4144
4145 XSRETURN_NO;
4146}
4147
4148MODULE = Coro::State PACKAGE = Coro::Signal
4149
4150SV *
4151new (SV *klass)
4152 CODE:
4153 RETVAL = sv_bless (
4154 coro_waitarray_new (aTHX_ 0),
4155 GvSTASH (CvGV (cv))
4156 );
4157 OUTPUT:
4158 RETVAL
4159
4160void
4161wait (...)
4162 CODE:
4163 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4164
4165void
4166broadcast (SV *self)
4167 CODE:
4168{
4169 AV *av = (AV *)SvRV (self);
4170 coro_signal_wake (aTHX_ av, AvFILLp (av));
4171}
4172
4173void
4174send (SV *self)
4175 CODE:
4176{
4177 AV *av = (AV *)SvRV (self);
4178
4179 if (AvFILLp (av))
4180 coro_signal_wake (aTHX_ av, 1);
4181 else
4182 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4183}
4184
4185IV
4186awaited (SV *self)
4187 CODE:
4188 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4189 OUTPUT:
4190 RETVAL
4191
4192
4193MODULE = Coro::State PACKAGE = Coro::AnyEvent
4194
4195BOOT:
4196 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4197
4198void
4199_schedule (...)
4200 CODE:
4201{
4202 static int incede;
4203
4204 api_cede_notself (aTHX);
4205
4206 ++incede;
4207 while (coro_nready >= incede && api_cede (aTHX))
4208 ;
4209
4210 sv_setsv (sv_activity, &PL_sv_undef);
4211 if (coro_nready >= incede)
4212 {
4213 PUSHMARK (SP);
4214 PUTBACK;
4215 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4216 }
4217
4218 --incede;
4219}
4220
4221
4222MODULE = Coro::State PACKAGE = Coro::AIO
4223
4224void
4225_register (char *target, char *proto, SV *req)
4226 CODE:
4227{
4228 SV *req_cv = s_get_cv_croak (req);
4229 /* newXSproto doesn't return the CV on 5.8 */
4230 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4231 sv_setpv ((SV *)slf_cv, proto);
4232 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4233}
4234
4235MODULE = Coro::State PACKAGE = Coro::Select
4236
4237void
4238patch_pp_sselect ()
4239 CODE:
4240 if (!coro_old_pp_sselect)
4241 {
4242 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4243 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4244 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4245 }
4246
4247void
4248unpatch_pp_sselect ()
4249 CODE:
4250 if (coro_old_pp_sselect)
4251 {
4252 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4253 coro_old_pp_sselect = 0;
4254 }
4255

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