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Comparing Coro/Coro/State.xs (file contents):
Revision 1.106 by root, Mon Nov 27 02:08:55 2006 UTC vs.
Revision 1.450 by root, Sun Jun 28 22:31:03 2015 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1 /* perl usually disables NDEBUG later */
5
1#include "libcoro/coro.c" 6#include "libcoro/coro.c"
7
8#define PERL_NO_GET_CONTEXT
9#define PERL_EXT
2 10
3#include "EXTERN.h" 11#include "EXTERN.h"
4#include "perl.h" 12#include "perl.h"
5#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
6 15
7#include "patchlevel.h" 16#include "schmorp.h"
8 17
9#if USE_VALGRIND 18#define ECB_NO_THREADS 1
10# include <valgrind/valgrind.h> 19#define ECB_NO_LIBM 1
11#endif 20#include "ecb.h"
12 21
13#define PERL_VERSION_ATLEAST(a,b,c) \ 22#include <stddef.h>
14 (PERL_REVISION > (a) \
15 || (PERL_REVISION == (a) \
16 && (PERL_VERSION > (b) \
17 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18
19#if !PERL_VERSION_ATLEAST (5,6,0)
20# ifndef PL_ppaddr
21# define PL_ppaddr ppaddr
22# endif
23# ifndef call_sv
24# define call_sv perl_call_sv
25# endif
26# ifndef get_sv
27# define get_sv perl_get_sv
28# endif
29# ifndef get_cv
30# define get_cv perl_get_cv
31# endif
32# ifndef IS_PADGV
33# define IS_PADGV(v) 0
34# endif
35# ifndef IS_PADCONST
36# define IS_PADCONST(v) 0
37# endif
38#endif
39
40#include <stdio.h> 23#include <stdio.h>
41#include <errno.h> 24#include <errno.h>
42
43#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
44# undef STACKGUARD
45#endif
46
47#ifndef STACKGUARD
48# define STACKGUARD 0
49#endif
50
51#ifdef HAVE_MMAP
52# include <unistd.h> 25#include <assert.h>
53# include <sys/mman.h> 26
54# ifndef MAP_ANONYMOUS 27#ifndef SVs_PADSTALE
55# ifdef MAP_ANON 28# define SVs_PADSTALE 0
56# define MAP_ANONYMOUS MAP_ANON
57# else
58# undef HAVE_MMAP
59# endif 29#endif
30
31#ifdef PadARRAY
32# define NEWPADAPI 1
33# define newPADLIST(var) (Newz (0, var, 1, PADLIST), Newx (PadlistARRAY (var), 2, PAD *))
34#else
35typedef AV PADNAMELIST;
36# if !PERL_VERSION_ATLEAST(5,8,0)
37typedef AV PADLIST;
38typedef AV PAD;
60# endif 39# endif
61# include <limits.h> 40# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
62# ifndef PAGESIZE 41# define PadlistMAX(pl) AvFILLp (pl)
63# define PAGESIZE pagesize 42# define PadlistNAMES(pl) (*PadlistARRAY (pl))
64# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 43# define PadARRAY AvARRAY
65static long pagesize; 44# define PadMAX AvFILLp
45# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
46#endif
47#ifndef PadnamelistREFCNT
48# define PadnamelistREFCNT(pnl) SvREFCNT (pnl)
49#endif
50#ifndef PadnamelistREFCNT_dec
51# define PadnamelistREFCNT_dec(pnl) SvREFCNT_dec (pnl)
52#endif
53
54/* 5.19.something has replaced SVt_BIND by SVt_INVLIST */
55/* we just alias it to SVt_IV, as that is sufficient for swap_sv for now */
56#if PERL_VERSION_ATLEAST(5,19,0)
57# define SVt_BIND SVt_IV
58#endif
59
60#if defined(_WIN32)
61# undef HAS_GETTIMEOFDAY
62# undef setjmp
63# undef longjmp
64# undef _exit
65# define setjmp _setjmp /* deep magic */
66# else 66#else
67# define BOOT_PAGESIZE (void)0 67# include <inttypes.h> /* most portable stdint.h */
68#endif
69
70/* the maximum number of idle cctx that will be pooled */
71static int cctx_max_idle = 4;
72
73#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
74# define HAS_SCOPESTACK_NAME 1
75#endif
76
77/* prefer perl internal functions over our own? */
78#ifndef CORO_PREFER_PERL_FUNCTIONS
79# define CORO_PREFER_PERL_FUNCTIONS 0
80#endif
81
82/* The next macros try to return the current stack pointer, in an as
83 * portable way as possible. */
84#if __GNUC__ >= 4
85# define dSTACKLEVEL int stacklevel_dummy
86# define STACKLEVEL __builtin_frame_address (0)
87#else
88# define dSTACKLEVEL volatile void *stacklevel
89# define STACKLEVEL ((void *)&stacklevel)
90#endif
91
92#define IN_DESTRUCT PL_dirty
93
94#include "CoroAPI.h"
95#define GCoroAPI (&coroapi) /* very sneaky */
96
97#ifdef USE_ITHREADS
98# if CORO_PTHREAD
99static void *coro_thx;
68# endif 100# endif
69#else 101#endif
70# define PAGESIZE 0 102
71# define BOOT_PAGESIZE (void)0 103#ifdef __linux
104# include <time.h> /* for timespec */
105# include <syscall.h> /* for SYS_* */
106# ifdef SYS_clock_gettime
107# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
108# define CORO_CLOCK_MONOTONIC 1
109# define CORO_CLOCK_THREAD_CPUTIME_ID 3
72#endif 110# endif
73
74/* The next macro should declare a variable stacklevel that contains and approximation
75 * to the current C stack pointer. Its property is that it changes with each call
76 * and should be unique. */
77#define dSTACKLEVEL int stacklevel
78#define STACKLEVEL ((void *)&stacklevel)
79
80#define IN_DESTRUCT (PL_main_cv == Nullcv)
81
82#if __GNUC__ >= 3
83# define attribute(x) __attribute__(x)
84#else
85# define attribute(x)
86#endif 111#endif
87 112
88#define NOINLINE attribute ((noinline)) 113static double (*nvtime)(); /* so why doesn't it take void? */
114static void (*u2time)(pTHX_ UV ret[2]);
89 115
90#include "CoroAPI.h" 116/* we hijack an hopefully unused CV flag for our purposes */
117#define CVf_SLF 0x4000
118static OP *pp_slf (pTHX);
119static void slf_destroy (pTHX_ struct coro *coro);
91 120
92#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */ 121static U32 cctx_gen;
93 122static size_t cctx_stacksize = CORO_STACKSIZE;
94#ifdef USE_ITHREADS
95static perl_mutex coro_mutex;
96# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
97# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98#else
99# define LOCK (void)0
100# define UNLOCK (void)0
101#endif
102
103static struct CoroAPI coroapi; 123static struct CoroAPI coroapi;
104static AV *main_mainstack; /* used to differentiate between $main and others */ 124static AV *main_mainstack; /* used to differentiate between $main and others */
125static JMPENV *main_top_env;
105static HV *coro_state_stash, *coro_stash; 126static HV *coro_state_stash, *coro_stash;
106static SV *coro_mortal; /* will be freed after next transfer */ 127static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
128
129static AV *av_destroy; /* destruction queue */
130static SV *sv_manager; /* the manager coro */
131static SV *sv_idle; /* $Coro::idle */
132
133static GV *irsgv; /* $/ */
134static GV *stdoutgv; /* *STDOUT */
135static SV *rv_diehook;
136static SV *rv_warnhook;
137static HV *hv_sig; /* %SIG */
138
139/* async_pool helper stuff */
140static SV *sv_pool_rss;
141static SV *sv_pool_size;
142static SV *sv_async_pool_idle; /* description string */
143static AV *av_async_pool; /* idle pool */
144static SV *sv_Coro; /* class string */
145static CV *cv_pool_handler;
146
147/* Coro::AnyEvent */
148static SV *sv_activity;
149
150/* enable processtime/realtime profiling */
151static char enable_times;
152typedef U32 coro_ts[2];
153static coro_ts time_real, time_cpu;
154static char times_valid;
155
156static struct coro_cctx *cctx_first;
157static int cctx_count, cctx_idle;
158
159enum
160{
161 CC_MAPPED = 0x01,
162 CC_NOREUSE = 0x02, /* throw this away after tracing */
163 CC_TRACE = 0x04,
164 CC_TRACE_SUB = 0x08, /* trace sub calls */
165 CC_TRACE_LINE = 0x10, /* trace each statement */
166 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
167};
107 168
108/* this is a structure representing a c-level coroutine */ 169/* this is a structure representing a c-level coroutine */
109typedef struct coro_cctx { 170typedef struct coro_cctx
171{
110 struct coro_cctx *next; 172 struct coro_cctx *next;
111 173
112 /* the stack */ 174 /* the stack */
113 void *sptr; 175 struct coro_stack stack;
114 long ssize; /* positive == mmap, otherwise malloc */
115 176
116 /* cpu state */ 177 /* cpu state */
117 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 178 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
179#ifndef NDEBUG
180 JMPENV *idle_te; /* same as idle_sp, but for top_env */
181#endif
118 JMPENV *top_env; 182 JMPENV *top_env;
119 coro_context cctx; 183 coro_context cctx;
120 184
185 U32 gen;
121#if USE_VALGRIND 186#if CORO_USE_VALGRIND
122 int valgrind_id; 187 int valgrind_id;
123#endif 188#endif
189 unsigned char flags;
124} coro_cctx; 190} coro_cctx;
125 191
192static coro_cctx *cctx_current; /* the currently running cctx */
193
194/*****************************************************************************/
195
196static MGVTBL coro_state_vtbl;
197
198enum
199{
200 CF_RUNNING = 0x0001, /* coroutine is running */
201 CF_READY = 0x0002, /* coroutine is ready */
202 CF_NEW = 0x0004, /* has never been switched to */
203 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
204 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
205 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
206};
207
208/* the structure where most of the perl state is stored, overlaid on the cxstack */
209typedef struct
210{
211 #define VARx(name,expr,type) type name;
212 #include "state.h"
213} perl_slots;
214
215/* how many context stack entries do we need for perl_slots */
216#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
217
126/* this is a structure representing a perl-level coroutine */ 218/* this is a structure representing a perl-level coroutine */
127struct coro { 219struct coro
220{
128 /* the c coroutine allocated to this perl coroutine, if any */ 221 /* the C coroutine allocated to this perl coroutine, if any */
129 coro_cctx *cctx; 222 coro_cctx *cctx;
130 223
131 /* data associated with this coroutine (initial args) */ 224 /* ready queue */
132 AV *args; 225 struct coro *next_ready;
133 int refcnt;
134 226
135 /* optionally saved, might be zero */ 227 /* state data */
136 AV *defav; 228 struct CoroSLF slf_frame; /* saved slf frame */
137 SV *defsv;
138 SV *errsv;
139
140 /* saved global state not related to stacks */
141 U8 dowarn;
142 I32 in_eval;
143
144 /* the stacks and related info (callchain etc..) */
145 PERL_SI *curstackinfo;
146 AV *curstack;
147 AV *mainstack; 229 AV *mainstack;
148 SV **stack_sp; 230 perl_slots *slot; /* basically the saved sp */
149 OP *op; 231
150 SV **curpad; 232 CV *startcv; /* the CV to execute */
151 AV *comppad; 233 AV *args; /* data associated with this coroutine (initial args) */
152 CV *compcv; 234 int flags; /* CF_ flags */
153 SV **stack_base; 235 HV *hv; /* the perl hash associated with this coro, if any */
154 SV **stack_max; 236
155 SV **tmps_stack; 237 /* statistics */
156 I32 tmps_floor; 238 int usecount; /* number of transfers to this coro */
157 I32 tmps_ix;
158 I32 tmps_max;
159 I32 *markstack;
160 I32 *markstack_ptr;
161 I32 *markstack_max;
162 I32 *scopestack;
163 I32 scopestack_ix;
164 I32 scopestack_max;
165 ANY *savestack;
166 I32 savestack_ix;
167 I32 savestack_max;
168 OP **retstack;
169 I32 retstack_ix;
170 I32 retstack_max;
171 PMOP *curpm;
172 COP *curcop;
173 239
174 /* coro process data */ 240 /* coro process data */
175 int prio; 241 int prio;
242 SV *except; /* exception to be thrown */
243 SV *rouse_cb; /* last rouse callback */
244 AV *on_destroy; /* callbacks or coros to notify on destroy */
245 AV *status; /* the exit status list */
246
247 /* async_pool */
248 SV *saved_deffh;
249 SV *invoke_cb;
250 AV *invoke_av;
251
252 /* on_enter/on_leave */
253 AV *on_enter; AV *on_enter_xs;
254 AV *on_leave; AV *on_leave_xs;
255
256 /* swap_sv */
257 AV *swap_sv;
258
259 /* times */
260 coro_ts t_cpu, t_real;
261
262 /* linked list */
263 struct coro *next, *prev;
176}; 264};
177 265
178typedef struct coro *Coro__State; 266typedef struct coro *Coro__State;
179typedef struct coro *Coro__State_or_hashref; 267typedef struct coro *Coro__State_or_hashref;
180 268
269/* the following variables are effectively part of the perl context */
270/* and get copied between struct coro and these variables */
271/* the main reason we don't support windows process emulation */
272static struct CoroSLF slf_frame; /* the current slf frame */
273
274/** Coro ********************************************************************/
275
276#define CORO_PRIO_MAX 3
277#define CORO_PRIO_HIGH 1
278#define CORO_PRIO_NORMAL 0
279#define CORO_PRIO_LOW -1
280#define CORO_PRIO_IDLE -3
281#define CORO_PRIO_MIN -4
282
283/* for Coro.pm */
284static SV *coro_current;
285static SV *coro_readyhook;
286static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
287static CV *cv_coro_run;
288static struct coro *coro_first;
289#define coro_nready coroapi.nready
290
291/** JIT *********************************************************************/
292
293#if CORO_JIT
294 /* APPLE doesn't have mmap though */
295 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
296 #ifndef CORO_JIT_TYPE
297 #if ECB_AMD64 && CORO_JIT_UNIXY
298 #define CORO_JIT_TYPE "amd64-unix"
299 #elif __i386 && CORO_JIT_UNIXY
300 #define CORO_JIT_TYPE "x86-unix"
301 #endif
302 #endif
303#endif
304
305#if !defined(CORO_JIT_TYPE) || _POSIX_MEMORY_PROTECTION <= 0
306 #undef CORO_JIT
307#endif
308
309#if CORO_JIT
310 typedef void (*load_save_perl_slots_type)(perl_slots *);
311 static 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... */
181static AV * 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 (void)
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
385
386/** lowlevel stuff **********************************************************/
387
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 (void)
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_sv)
501{
502 MAGIC *mg;
503
504 if (SvROK (coro_sv))
505 coro_sv = SvRV (coro_sv);
506
507 mg = SvSTATEhv_p (aTHX_ coro_sv);
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 PADLIST *
182coro_clone_padlist (CV *cv) 524coro_derive_padlist (pTHX_ CV *cv)
183{ 525{
184 AV *padlist = CvPADLIST (cv); 526 PADLIST *padlist = CvPADLIST (cv);
185 AV *newpadlist, *newpad; 527 PADLIST *newpadlist;
528 PADNAMELIST *padnames;
529 PAD *newpad;
530 PADOFFSET off = PadlistMAX (padlist) + 1;
186 531
187 newpadlist = newAV (); 532#if NEWPADAPI
533
534 /* if we had the original CvDEPTH, we might be able to steal the CvDEPTH+1 entry instead */
535 /* 20131102194744.GA6705@schmorp.de, 20131102195825.2013.qmail@lists-nntp.develooper.com */
536 while (!PadlistARRAY (padlist)[off - 1])
537 --off;
538
539 Perl_pad_push (aTHX_ padlist, off);
540
541 newpad = PadlistARRAY (padlist)[off];
542 PadlistARRAY (padlist)[off] = 0;
543
544#else
545
546#if PERL_VERSION_ATLEAST (5,10,0)
547 Perl_pad_push (aTHX_ padlist, off);
548#else
549 Perl_pad_push (aTHX_ padlist, off, 1);
550#endif
551
552 newpad = PadlistARRAY (padlist)[off];
553 PadlistMAX (padlist) = off - 1;
554
555#endif
556
557 newPADLIST (newpadlist);
558#if !PERL_VERSION_ATLEAST(5,15,3)
559 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
188 AvREAL_off (newpadlist); 560 AvREAL_off (newpadlist);
189#if PERL_VERSION_ATLEAST (5,9,0)
190 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
191#else
192 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
193#endif 561#endif
194 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
195 --AvFILLp (padlist);
196 562
197 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 563 /* Already extended to 2 elements by newPADLIST. */
198 av_store (newpadlist, 1, (SV *)newpad); 564 PadlistMAX (newpadlist) = 1;
565
566 padnames = PadlistNAMES (padlist);
567 ++PadnamelistREFCNT (padnames);
568 PadlistNAMES (newpadlist) = padnames;
569
570 PadlistARRAY (newpadlist)[1] = newpad;
199 571
200 return newpadlist; 572 return newpadlist;
201} 573}
202 574
203static void 575ecb_inline void
204free_padlist (AV *padlist) 576free_padlist (pTHX_ PADLIST *padlist)
205{ 577{
206 /* may be during global destruction */ 578 /* may be during global destruction */
207 if (SvREFCNT (padlist)) 579 if (!IN_DESTRUCT)
208 { 580 {
209 I32 i = AvFILLp (padlist); 581 I32 i = PadlistMAX (padlist);
210 while (i >= 0) 582
583 while (i > 0) /* special-case index 0 */
211 { 584 {
212 SV **svp = av_fetch (padlist, i--, FALSE); 585 /* we try to be extra-careful here */
586 PAD *pad = PadlistARRAY (padlist)[i--];
587
213 if (svp) 588 if (pad)
214 { 589 {
215 SV *sv; 590 I32 j = PadMAX (pad);
216 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 591
592 while (j >= 0)
217 SvREFCNT_dec (sv); 593 SvREFCNT_dec (PadARRAY (pad)[j--]);
218 594
595 PadMAX (pad) = -1;
219 SvREFCNT_dec (*svp); 596 SvREFCNT_dec (pad);
220 } 597 }
221 } 598 }
222 599
600 PadnamelistREFCNT_dec (PadlistNAMES (padlist));
601
602#if NEWPADAPI
603 Safefree (PadlistARRAY (padlist));
604 Safefree (padlist);
605#else
606 AvFILLp (padlist) = -1;
607 AvREAL_off (padlist);
223 SvREFCNT_dec ((SV*)padlist); 608 SvREFCNT_dec ((SV*)padlist);
609#endif
224 } 610 }
225} 611}
226 612
227static int 613static int
228coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 614coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
229{ 615{
230 AV *padlist; 616 PADLIST *padlist;
231 AV *av = (AV *)mg->mg_obj; 617 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
618 size_t len = *(size_t *)mg->mg_ptr;
232 619
233 /* casting is fun. */ 620 /* perl manages to free our internal AV and _then_ call us */
234 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 621 if (IN_DESTRUCT)
622 return 0;
623
624 while (len--)
235 free_padlist (padlist); 625 free_padlist (aTHX_ padlists[len]);
236
237 SvREFCNT_dec (av);
238 626
239 return 0; 627 return 0;
240} 628}
241 629
242#define PERL_MAGIC_coro PERL_MAGIC_ext 630static MGVTBL coro_cv_vtbl = {
243 631 0, 0, 0, 0,
244static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 632 coro_cv_free
633};
245 634
246/* the next two functions merely cache the padlists */ 635/* the next two functions merely cache the padlists */
247static void 636ecb_inline void
248get_padlist (CV *cv) 637get_padlist (pTHX_ CV *cv)
249{ 638{
250 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 639 MAGIC *mg = CORO_MAGIC_cv (cv);
640 size_t *lenp;
251 641
252 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 642 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
253 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 643 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
254 else 644 else
255 { 645 {
256#if 0 646#if CORO_PREFER_PERL_FUNCTIONS
257 /* this is probably cleaner, but also slower? */ 647 /* this is probably cleaner? but also slower! */
648 /* in practise, it seems to be less stable */
258 CV *cp = Perl_cv_clone (cv); 649 CV *cp = Perl_cv_clone (aTHX_ cv);
259 CvPADLIST (cv) = CvPADLIST (cp); 650 CvPADLIST (cv) = CvPADLIST (cp);
260 CvPADLIST (cp) = 0; 651 CvPADLIST (cp) = 0;
261 SvREFCNT_dec (cp); 652 SvREFCNT_dec (cp);
262#else 653#else
263 CvPADLIST (cv) = coro_clone_padlist (cv); 654 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
264#endif 655#endif
265 } 656 }
266} 657}
267 658
268static void 659ecb_inline void
269put_padlist (CV *cv) 660put_padlist (pTHX_ CV *cv)
270{ 661{
271 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 662 MAGIC *mg = CORO_MAGIC_cv (cv);
272 663
273 if (!mg) 664 if (ecb_expect_false (!mg))
274 {
275 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
276 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
277 mg->mg_virtual = &vtbl_coro;
278 mg->mg_obj = (SV *)newAV ();
279 } 665 {
666 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
667 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
668 mg->mg_len = 1; /* so mg_free frees mg_ptr */
669 }
670 else
671 Renew (mg->mg_ptr,
672 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
673 char);
280 674
281 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 675 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
282} 676}
283 677
284#define SB do { 678/** load & save, init *******************************************************/
285#define SE } while (0)
286 679
287#define LOAD(state) load_state((state)); 680ecb_inline void
288#define SAVE(state,flags) save_state((state),(flags)); 681swap_sv (SV *a, SV *b)
682{
683 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
684 SV tmp;
289 685
290#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 686 /* swap sv_any */
687 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
291 688
689 /* swap sv_flags */
690 SvFLAGS (&tmp) = SvFLAGS (a);
691 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
692 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
693
694#if PERL_VERSION_ATLEAST (5,10,0)
695 /* perl 5.10 and later complicates this _quite_ a bit, but it also
696 * is much faster, so no quarrels here. alternatively, we could
697 * sv_upgrade to avoid this.
698 */
699 {
700 /* swap sv_u */
701 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
702
703 /* if SvANY points to the head, we need to adjust the pointers,
704 * as the pointer for a still points to b, and maybe vice versa.
705 */
706 #define svany_in_head(type) \
707 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
708
709 if (svany_in_head (SvTYPE (a)))
710 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
711
712 if (svany_in_head (SvTYPE (b)))
713 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
714 }
715#endif
716}
717
718/* swap sv heads, at least logically */
292static void 719static void
720swap_svs (pTHX_ Coro__State c)
721{
722 int i;
723
724 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
725 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
726}
727
728#define SWAP_SVS(coro) \
729 if (ecb_expect_false ((coro)->swap_sv)) \
730 swap_svs (aTHX_ (coro))
731
732static void
733on_enterleave_call (pTHX_ SV *cb);
734
735static void
293load_state(Coro__State c) 736load_perl (pTHX_ Coro__State c)
294{ 737{
295 PL_dowarn = c->dowarn; 738 perl_slots *slot = c->slot;
296 PL_in_eval = c->in_eval; 739 c->slot = 0;
297 740
298 PL_curstackinfo = c->curstackinfo;
299 PL_curstack = c->curstack;
300 PL_mainstack = c->mainstack; 741 PL_mainstack = c->mainstack;
301 PL_stack_sp = c->stack_sp;
302 PL_op = c->op;
303 PL_curpad = c->curpad;
304 PL_comppad = c->comppad;
305 PL_compcv = c->compcv;
306 PL_stack_base = c->stack_base;
307 PL_stack_max = c->stack_max;
308 PL_tmps_stack = c->tmps_stack;
309 PL_tmps_floor = c->tmps_floor;
310 PL_tmps_ix = c->tmps_ix;
311 PL_tmps_max = c->tmps_max;
312 PL_markstack = c->markstack;
313 PL_markstack_ptr = c->markstack_ptr;
314 PL_markstack_max = c->markstack_max;
315 PL_scopestack = c->scopestack;
316 PL_scopestack_ix = c->scopestack_ix;
317 PL_scopestack_max = c->scopestack_max;
318 PL_savestack = c->savestack;
319 PL_savestack_ix = c->savestack_ix;
320 PL_savestack_max = c->savestack_max;
321#if !PERL_VERSION_ATLEAST (5,9,0)
322 PL_retstack = c->retstack;
323 PL_retstack_ix = c->retstack_ix;
324 PL_retstack_max = c->retstack_max;
325#endif
326 PL_curpm = c->curpm;
327 PL_curcop = c->curcop;
328 742
329 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 743#if CORO_JIT
330 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 744 load_perl_slots (slot);
331 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 745#else
746 #define VARx(name,expr,type) expr = slot->name;
747 #include "state.h"
748#endif
332 749
333 { 750 {
334 dSP; 751 dSP;
752
335 CV *cv; 753 CV *cv;
336 754
337 /* now do the ugly restore mess */ 755 /* now do the ugly restore mess */
338 while ((cv = (CV *)POPs)) 756 while (ecb_expect_true (cv = (CV *)POPs))
339 { 757 {
340 AV *padlist = (AV *)POPs;
341
342 if (padlist)
343 {
344 put_padlist (cv); /* mark this padlist as available */ 758 put_padlist (aTHX_ cv); /* mark this padlist as available */
345 CvPADLIST(cv) = padlist; 759 CvDEPTH (cv) = PTR2IV (POPs);
346 } 760 CvPADLIST (cv) = (PADLIST *)POPs;
347
348 ++CvDEPTH(cv);
349 } 761 }
350 762
351 PUTBACK; 763 PUTBACK;
352 } 764 }
353}
354 765
766 slf_frame = c->slf_frame;
767 CORO_THROW = c->except;
768
769 if (ecb_expect_false (enable_times))
770 {
771 if (ecb_expect_false (!times_valid))
772 coro_times_update ();
773
774 coro_times_sub (c);
775 }
776
777 if (ecb_expect_false (c->on_enter))
778 {
779 int i;
780
781 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
782 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
783 }
784
785 if (ecb_expect_false (c->on_enter_xs))
786 {
787 int i;
788
789 for (i = 0; i <= AvFILLp (c->on_enter_xs); i += 2)
790 ((coro_enterleave_hook)AvARRAY (c->on_enter_xs)[i]) (aTHX_ AvARRAY (c->on_enter_xs)[i + 1]);
791 }
792
793 SWAP_SVS (c);
794}
795
355static void 796static void
356save_state(Coro__State c, int flags) 797save_perl (pTHX_ Coro__State c)
357{ 798{
799 SWAP_SVS (c);
800
801 if (ecb_expect_false (c->on_leave_xs))
802 {
803 int i;
804
805 for (i = AvFILLp (c->on_leave_xs) - 1; i >= 0; i -= 2)
806 ((coro_enterleave_hook)AvARRAY (c->on_leave_xs)[i]) (aTHX_ AvARRAY (c->on_leave_xs)[i + 1]);
807 }
808
809 if (ecb_expect_false (c->on_leave))
810 {
811 int i;
812
813 for (i = AvFILLp (c->on_leave); i >= 0; --i)
814 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
815 }
816
817 times_valid = 0;
818
819 if (ecb_expect_false (enable_times))
820 {
821 coro_times_update (); times_valid = 1;
822 coro_times_add (c);
823 }
824
825 c->except = CORO_THROW;
826 c->slf_frame = slf_frame;
827
358 { 828 {
359 dSP; 829 dSP;
360 I32 cxix = cxstack_ix; 830 I32 cxix = cxstack_ix;
361 PERL_CONTEXT *ccstk = cxstack; 831 PERL_CONTEXT *ccstk = cxstack;
362 PERL_SI *top_si = PL_curstackinfo; 832 PERL_SI *top_si = PL_curstackinfo;
… …
364 /* 834 /*
365 * the worst thing you can imagine happens first - we have to save 835 * the worst thing you can imagine happens first - we have to save
366 * (and reinitialize) all cv's in the whole callchain :( 836 * (and reinitialize) all cv's in the whole callchain :(
367 */ 837 */
368 838
369 PUSHs (Nullsv); 839 XPUSHs (Nullsv);
370 /* this loop was inspired by pp_caller */ 840 /* this loop was inspired by pp_caller */
371 for (;;) 841 for (;;)
372 { 842 {
373 while (cxix >= 0) 843 while (ecb_expect_true (cxix >= 0))
374 { 844 {
375 PERL_CONTEXT *cx = &ccstk[cxix--]; 845 PERL_CONTEXT *cx = &ccstk[cxix--];
376 846
377 if (CxTYPE(cx) == CXt_SUB) 847 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
378 { 848 {
379 CV *cv = cx->blk_sub.cv; 849 CV *cv = cx->blk_sub.cv;
850
380 if (CvDEPTH(cv)) 851 if (ecb_expect_true (CvDEPTH (cv)))
381 { 852 {
382 EXTEND (SP, CvDEPTH(cv)*2); 853 EXTEND (SP, 3);
383
384 while (--CvDEPTH(cv))
385 {
386 /* this tells the restore code to increment CvDEPTH */
387 PUSHs (Nullsv);
388 PUSHs ((SV *)cv);
389 }
390
391 PUSHs ((SV *)CvPADLIST(cv)); 854 PUSHs ((SV *)CvPADLIST (cv));
855 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
392 PUSHs ((SV *)cv); 856 PUSHs ((SV *)cv);
393 857
858 CvDEPTH (cv) = 0;
394 get_padlist (cv); 859 get_padlist (aTHX_ cv);
395 } 860 }
396 } 861 }
397#ifdef CXt_FORMAT
398 else if (CxTYPE(cx) == CXt_FORMAT)
399 {
400 /* I never used formats, so how should I know how these are implemented? */
401 /* my bold guess is as a simple, plain sub... */
402 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
403 }
404#endif
405 } 862 }
406 863
407 if (top_si->si_type == PERLSI_MAIN) 864 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
408 break; 865 break;
409 866
410 top_si = top_si->si_prev; 867 top_si = top_si->si_prev;
411 ccstk = top_si->si_cxstack; 868 ccstk = top_si->si_cxstack;
412 cxix = top_si->si_cxix; 869 cxix = top_si->si_cxix;
413 } 870 }
414 871
415 PUTBACK; 872 PUTBACK;
416 } 873 }
417 874
418 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 875 /* allocate some space on the context stack for our purposes */
419 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 876 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
420 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 877 {
878 unsigned int i;
421 879
422 c->dowarn = PL_dowarn; 880 for (i = 0; i < SLOT_COUNT; ++i)
423 c->in_eval = PL_in_eval; 881 CXINC;
424 882
425 c->curstackinfo = PL_curstackinfo; 883 cxstack_ix -= SLOT_COUNT; /* undo allocation */
426 c->curstack = PL_curstack; 884 }
885
427 c->mainstack = PL_mainstack; 886 c->mainstack = PL_mainstack;
428 c->stack_sp = PL_stack_sp; 887
429 c->op = PL_op; 888 {
430 c->curpad = PL_curpad; 889 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
431 c->comppad = PL_comppad; 890
432 c->compcv = PL_compcv; 891#if CORO_JIT
433 c->stack_base = PL_stack_base; 892 save_perl_slots (slot);
434 c->stack_max = PL_stack_max; 893#else
435 c->tmps_stack = PL_tmps_stack; 894 #define VARx(name,expr,type) slot->name = expr;
436 c->tmps_floor = PL_tmps_floor; 895 #include "state.h"
437 c->tmps_ix = PL_tmps_ix;
438 c->tmps_max = PL_tmps_max;
439 c->markstack = PL_markstack;
440 c->markstack_ptr = PL_markstack_ptr;
441 c->markstack_max = PL_markstack_max;
442 c->scopestack = PL_scopestack;
443 c->scopestack_ix = PL_scopestack_ix;
444 c->scopestack_max = PL_scopestack_max;
445 c->savestack = PL_savestack;
446 c->savestack_ix = PL_savestack_ix;
447 c->savestack_max = PL_savestack_max;
448#if !PERL_VERSION_ATLEAST (5,9,0)
449 c->retstack = PL_retstack;
450 c->retstack_ix = PL_retstack_ix;
451 c->retstack_max = PL_retstack_max;
452#endif 896#endif
453 c->curpm = PL_curpm; 897 }
454 c->curcop = PL_curcop;
455} 898}
456 899
457/* 900/*
458 * allocate various perl stacks. This is an exact copy 901 * allocate various perl stacks. This is almost an exact copy
459 * of perl.c:init_stacks, except that it uses less memory 902 * of perl.c:init_stacks, except that it uses less memory
460 * on the (sometimes correct) assumption that coroutines do 903 * on the (sometimes correct) assumption that coroutines do
461 * not usually need a lot of stackspace. 904 * not usually need a lot of stackspace.
462 */ 905 */
906#if CORO_PREFER_PERL_FUNCTIONS
907# define coro_init_stacks(thx) init_stacks ()
908#else
463static void 909static void
464coro_init_stacks () 910coro_init_stacks (pTHX)
465{ 911{
466 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 912 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
467 PL_curstackinfo->si_type = PERLSI_MAIN; 913 PL_curstackinfo->si_type = PERLSI_MAIN;
468 PL_curstack = PL_curstackinfo->si_stack; 914 PL_curstack = PL_curstackinfo->si_stack;
469 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 915 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
470 916
471 PL_stack_base = AvARRAY(PL_curstack); 917 PL_stack_base = AvARRAY(PL_curstack);
472 PL_stack_sp = PL_stack_base; 918 PL_stack_sp = PL_stack_base;
473 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 919 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
474 920
475 New(50,PL_tmps_stack,96,SV*); 921 New(50,PL_tmps_stack,32,SV*);
476 PL_tmps_floor = -1; 922 PL_tmps_floor = -1;
477 PL_tmps_ix = -1; 923 PL_tmps_ix = -1;
478 PL_tmps_max = 96; 924 PL_tmps_max = 32;
479 925
480 New(54,PL_markstack,16,I32); 926 New(54,PL_markstack,16,I32);
481 PL_markstack_ptr = PL_markstack; 927 PL_markstack_ptr = PL_markstack;
482 PL_markstack_max = PL_markstack + 16; 928 PL_markstack_max = PL_markstack + 16;
483 929
484#ifdef SET_MARK_OFFSET 930#ifdef SET_MARK_OFFSET
485 SET_MARK_OFFSET; 931 SET_MARK_OFFSET;
486#endif 932#endif
487 933
488 New(54,PL_scopestack,16,I32); 934 New(54,PL_scopestack,8,I32);
489 PL_scopestack_ix = 0; 935 PL_scopestack_ix = 0;
490 PL_scopestack_max = 16; 936 PL_scopestack_max = 8;
937#if HAS_SCOPESTACK_NAME
938 New(54,PL_scopestack_name,8,const char*);
939#endif
491 940
492 New(54,PL_savestack,96,ANY); 941 New(54,PL_savestack,24,ANY);
493 PL_savestack_ix = 0; 942 PL_savestack_ix = 0;
494 PL_savestack_max = 96; 943 PL_savestack_max = 24;
495 944
496#if !PERL_VERSION_ATLEAST (5,9,0) 945#if !PERL_VERSION_ATLEAST (5,10,0)
497 New(54,PL_retstack,8,OP*); 946 New(54,PL_retstack,4,OP*);
498 PL_retstack_ix = 0; 947 PL_retstack_ix = 0;
499 PL_retstack_max = 8; 948 PL_retstack_max = 4;
500#endif 949#endif
501} 950}
951#endif
502 952
503/* 953/*
504 * destroy the stacks, the callchain etc... 954 * destroy the stacks, the callchain etc...
505 */ 955 */
506static void 956static void
507coro_destroy_stacks () 957coro_destruct_stacks (pTHX)
508{ 958{
509 if (!IN_DESTRUCT)
510 {
511 /* is this ugly, I ask? */
512 LEAVE_SCOPE (0);
513
514 /* sure it is, but more important: is it correct?? :/ */
515 FREETMPS;
516
517 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
518 }
519
520 while (PL_curstackinfo->si_next) 959 while (PL_curstackinfo->si_next)
521 PL_curstackinfo = PL_curstackinfo->si_next; 960 PL_curstackinfo = PL_curstackinfo->si_next;
522 961
523 while (PL_curstackinfo) 962 while (PL_curstackinfo)
524 { 963 {
525 PERL_SI *p = PL_curstackinfo->si_prev; 964 PERL_SI *p = PL_curstackinfo->si_prev;
526 965
527 { /*D*//*remove*/
528 dSP;
529 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
530 PUTBACK; /* possibly superfluous */
531 }
532
533 if (!IN_DESTRUCT) 966 if (!IN_DESTRUCT)
534 {
535 dounwind (-1);/*D*//*remove*/
536 SvREFCNT_dec (PL_curstackinfo->si_stack); 967 SvREFCNT_dec (PL_curstackinfo->si_stack);
537 }
538 968
539 Safefree (PL_curstackinfo->si_cxstack); 969 Safefree (PL_curstackinfo->si_cxstack);
540 Safefree (PL_curstackinfo); 970 Safefree (PL_curstackinfo);
541 PL_curstackinfo = p; 971 PL_curstackinfo = p;
542 } 972 }
543 973
544 Safefree (PL_tmps_stack); 974 Safefree (PL_tmps_stack);
545 Safefree (PL_markstack); 975 Safefree (PL_markstack);
546 Safefree (PL_scopestack); 976 Safefree (PL_scopestack);
977#if HAS_SCOPESTACK_NAME
978 Safefree (PL_scopestack_name);
979#endif
547 Safefree (PL_savestack); 980 Safefree (PL_savestack);
548#if !PERL_VERSION_ATLEAST (5,9,0) 981#if !PERL_VERSION_ATLEAST (5,10,0)
549 Safefree (PL_retstack); 982 Safefree (PL_retstack);
550#endif 983#endif
551} 984}
552 985
986#define CORO_RSS \
987 rss += sizeof (SYM (curstackinfo)); \
988 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
989 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
990 rss += SYM (tmps_max) * sizeof (SV *); \
991 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
992 rss += SYM (scopestack_max) * sizeof (I32); \
993 rss += SYM (savestack_max) * sizeof (ANY);
994
995static size_t
996coro_rss (pTHX_ struct coro *coro)
997{
998 size_t rss = sizeof (*coro);
999
1000 if (coro->mainstack)
1001 {
1002 if (coro->flags & CF_RUNNING)
1003 {
1004 #define SYM(sym) PL_ ## sym
1005 CORO_RSS;
1006 #undef SYM
1007 }
1008 else
1009 {
1010 #define SYM(sym) coro->slot->sym
1011 CORO_RSS;
1012 #undef SYM
1013 }
1014 }
1015
1016 return rss;
1017}
1018
1019/** coroutine stack handling ************************************************/
1020
1021static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
1022static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
1023static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
1024
1025/* apparently < 5.8.8 */
1026#ifndef MgPV_nolen_const
1027#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
1028 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
1029 (const char*)(mg)->mg_ptr)
1030#endif
1031
1032/*
1033 * This overrides the default magic get method of %SIG elements.
1034 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
1035 * and instead of trying to save and restore the hash elements (extremely slow),
1036 * we just provide our own readback here.
1037 */
1038static int ecb_cold
1039coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
1040{
1041 const char *s = MgPV_nolen_const (mg);
1042
1043 if (*s == '_')
1044 {
1045 SV **svp = 0;
1046
1047 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1048 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1049
1050 if (svp)
1051 {
1052 SV *ssv;
1053
1054 if (!*svp)
1055 ssv = &PL_sv_undef;
1056 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1057 ssv = sv_2mortal (newRV_inc (*svp));
1058 else
1059 ssv = *svp;
1060
1061 sv_setsv (sv, ssv);
1062 return 0;
1063 }
1064 }
1065
1066 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1067}
1068
1069static int ecb_cold
1070coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1071{
1072 const char *s = MgPV_nolen_const (mg);
1073
1074 if (*s == '_')
1075 {
1076 SV **svp = 0;
1077
1078 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1079 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1080
1081 if (svp)
1082 {
1083 SV *old = *svp;
1084 *svp = 0;
1085 SvREFCNT_dec (old);
1086 return 0;
1087 }
1088 }
1089
1090 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1091}
1092
1093static int ecb_cold
1094coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1095{
1096 const char *s = MgPV_nolen_const (mg);
1097
1098 if (*s == '_')
1099 {
1100 SV **svp = 0;
1101
1102 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1103 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1104
1105 if (svp)
1106 {
1107 SV *old = *svp;
1108 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1109 SvREFCNT_dec (old);
1110 return 0;
1111 }
1112 }
1113
1114 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1115}
1116
1117static void
1118prepare_nop (pTHX_ struct coro_transfer_args *ta)
1119{
1120 /* kind of mega-hacky, but works */
1121 ta->next = ta->prev = (struct coro *)ta;
1122}
1123
553static void 1124static int
554setup_coro (struct coro *coro) 1125slf_check_nop (pTHX_ struct CoroSLF *frame)
1126{
1127 return 0;
1128}
1129
1130static int
1131slf_check_repeat (pTHX_ struct CoroSLF *frame)
1132{
1133 return 1;
1134}
1135
1136static UNOP init_perl_op;
1137
1138ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1139init_perl (pTHX_ struct coro *coro)
555{ 1140{
556 /* 1141 /*
557 * emulate part of the perl startup here. 1142 * emulate part of the perl startup here.
558 */ 1143 */
559
560 coro_init_stacks (); 1144 coro_init_stacks (aTHX);
561 1145
1146 PL_runops = RUNOPS_DEFAULT;
1147 PL_curcop = &PL_compiling;
1148 PL_in_eval = EVAL_NULL;
562 PL_curcop = 0; 1149 PL_comppad = 0;
563 PL_in_eval = 0; 1150 PL_comppad_name = 0;
1151 PL_comppad_name_fill = 0;
1152 PL_comppad_name_floor = 0;
564 PL_curpm = 0; 1153 PL_curpm = 0;
1154 PL_curpad = 0;
1155 PL_localizing = 0;
1156 PL_restartop = 0;
1157#if PERL_VERSION_ATLEAST (5,10,0)
1158 PL_parser = 0;
1159#endif
1160 PL_hints = 0;
1161
1162 /* recreate the die/warn hooks */
1163 PL_diehook = SvREFCNT_inc (rv_diehook);
1164 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1165
1166 GvSV (PL_defgv) = newSV (0);
1167 GvAV (PL_defgv) = coro->args; coro->args = 0;
1168 GvSV (PL_errgv) = newSV (0);
1169 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1170 GvHV (PL_hintgv) = newHV ();
1171#if PERL_VERSION_ATLEAST (5,10,0)
1172 hv_magic (GvHV (PL_hintgv), 0, PERL_MAGIC_hints);
1173#endif
1174 PL_rs = newSVsv (GvSV (irsgv));
1175 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
565 1176
566 { 1177 {
567 dSP; 1178 dSP;
568 LOGOP myop; 1179 UNOP myop;
569 1180
570 /* I have no idea why this is needed, but it is */ 1181 Zero (&myop, 1, UNOP);
1182 myop.op_next = Nullop;
1183 myop.op_type = OP_ENTERSUB;
1184 myop.op_flags = OPf_WANT_VOID;
1185
571 PUSHMARK (SP); 1186 PUSHMARK (SP);
572 1187 PUSHs ((SV *)coro->startcv);
573 SvREFCNT_dec (GvAV (PL_defgv)); 1188 PUTBACK;
574 GvAV (PL_defgv) = coro->args; coro->args = 0;
575
576 Zero (&myop, 1, LOGOP);
577 myop.op_next = Nullop;
578 myop.op_flags = OPf_WANT_VOID;
579
580 PL_op = (OP *)&myop; 1189 PL_op = (OP *)&myop;
581
582 PUSHMARK (SP);
583 XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
584 PUTBACK;
585 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1190 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
586 SPAGAIN;
587
588 ENTER; /* necessary e.g. for dounwind */
589 } 1191 }
590}
591 1192
1193 /* this newly created coroutine might be run on an existing cctx which most
1194 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1195 */
1196 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1197 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1198 slf_frame.destroy = 0;
1199
1200 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1201 init_perl_op.op_next = PL_op;
1202 init_perl_op.op_type = OP_ENTERSUB;
1203 init_perl_op.op_ppaddr = pp_slf;
1204 /* no flags etc. required, as an init function won't be called */
1205
1206 PL_op = (OP *)&init_perl_op;
1207
1208 /* copy throw, in case it was set before init_perl */
1209 CORO_THROW = coro->except;
1210
1211 SWAP_SVS (coro);
1212
1213 if (ecb_expect_false (enable_times))
1214 {
1215 coro_times_update ();
1216 coro_times_sub (coro);
1217 }
1218}
1219
592static void 1220static void
1221coro_unwind_stacks (pTHX)
1222{
1223 if (!IN_DESTRUCT)
1224 {
1225 /* restore all saved variables and stuff */
1226 LEAVE_SCOPE (0);
1227 assert (PL_tmps_floor == -1);
1228
1229 /* free all temporaries */
1230 FREETMPS;
1231 assert (PL_tmps_ix == -1);
1232
1233 /* unwind all extra stacks */
1234 POPSTACK_TO (PL_mainstack);
1235
1236 /* unwind main stack */
1237 dounwind (-1);
1238 }
1239}
1240
1241static void
1242destroy_perl (pTHX_ struct coro *coro)
1243{
1244 SV *svf [9];
1245
1246 {
1247 SV *old_current = SvRV (coro_current);
1248 struct coro *current = SvSTATE (old_current);
1249
1250 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1251
1252 save_perl (aTHX_ current);
1253
1254 /* this will cause transfer_check to croak on block*/
1255 SvRV_set (coro_current, (SV *)coro->hv);
1256
1257 load_perl (aTHX_ coro);
1258
1259 coro_unwind_stacks (aTHX);
1260
1261 /* restore swapped sv's */
1262 SWAP_SVS (coro);
1263
1264 coro_destruct_stacks (aTHX);
1265
1266 /* now save some sv's to be free'd later */
1267 svf [0] = GvSV (PL_defgv);
1268 svf [1] = (SV *)GvAV (PL_defgv);
1269 svf [2] = GvSV (PL_errgv);
1270 svf [3] = (SV *)PL_defoutgv;
1271 svf [4] = PL_rs;
1272 svf [5] = GvSV (irsgv);
1273 svf [6] = (SV *)GvHV (PL_hintgv);
1274 svf [7] = PL_diehook;
1275 svf [8] = PL_warnhook;
1276 assert (9 == sizeof (svf) / sizeof (*svf));
1277
1278 SvRV_set (coro_current, old_current);
1279
1280 load_perl (aTHX_ current);
1281 }
1282
1283 {
1284 unsigned int i;
1285
1286 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1287 SvREFCNT_dec (svf [i]);
1288
1289 SvREFCNT_dec (coro->saved_deffh);
1290 SvREFCNT_dec (coro->rouse_cb);
1291 SvREFCNT_dec (coro->invoke_cb);
1292 SvREFCNT_dec (coro->invoke_av);
1293 SvREFCNT_dec (coro->on_enter_xs);
1294 SvREFCNT_dec (coro->on_leave_xs);
1295 }
1296}
1297
1298ecb_inline void
593free_coro_mortal () 1299free_coro_mortal (pTHX)
594{ 1300{
595 if (coro_mortal) 1301 if (ecb_expect_true (coro_mortal))
596 { 1302 {
597 SvREFCNT_dec (coro_mortal); 1303 SvREFCNT_dec ((SV *)coro_mortal);
598 coro_mortal = 0; 1304 coro_mortal = 0;
599 } 1305 }
600} 1306}
601 1307
602static void NOINLINE
603prepare_cctx (coro_cctx *cctx)
604{
605 dSP;
606 LOGOP myop;
607
608 Zero (&myop, 1, LOGOP);
609 myop.op_next = PL_op;
610 myop.op_flags = OPf_WANT_VOID;
611
612 sv_setiv (get_sv ("Coro::State::cctx", FALSE), PTR2IV (cctx));
613
614 PUSHMARK (SP);
615 XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
616 PUTBACK;
617 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
618 SPAGAIN;
619}
620
621static void 1308static int
622coro_run (void *arg) 1309runops_trace (pTHX)
623{ 1310{
624 /* coro_run is the alternative epilogue of transfer() */ 1311 COP *oldcop = 0;
625 UNLOCK; 1312 int oldcxix = -2;
626 1313
627 /* 1314 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
628 * this is a _very_ stripped down perl interpreter ;) 1315 {
629 */ 1316 PERL_ASYNC_CHECK ();
1317
1318 if (cctx_current->flags & CC_TRACE_ALL)
1319 {
1320 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1321 {
1322 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1323 SV **bot, **top;
1324 AV *av = newAV (); /* return values */
1325 SV **cb;
1326 dSP;
1327
1328 GV *gv = CvGV (cx->blk_sub.cv);
1329 SV *fullname = sv_2mortal (newSV (0));
1330 if (isGV (gv))
1331 gv_efullname3 (fullname, gv, 0);
1332
1333 bot = PL_stack_base + cx->blk_oldsp + 1;
1334 top = cx->blk_gimme == G_ARRAY ? SP + 1
1335 : cx->blk_gimme == G_SCALAR ? bot + 1
1336 : bot;
1337
1338 av_extend (av, top - bot);
1339 while (bot < top)
1340 av_push (av, SvREFCNT_inc_NN (*bot++));
1341
1342 PL_runops = RUNOPS_DEFAULT;
1343 ENTER;
1344 SAVETMPS;
1345 EXTEND (SP, 3);
1346 PUSHMARK (SP);
1347 PUSHs (&PL_sv_no);
1348 PUSHs (fullname);
1349 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1350 PUTBACK;
1351 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1352 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1353 SPAGAIN;
1354 FREETMPS;
1355 LEAVE;
1356 PL_runops = runops_trace;
1357 }
1358
1359 if (oldcop != PL_curcop)
1360 {
1361 oldcop = PL_curcop;
1362
1363 if (PL_curcop != &PL_compiling)
1364 {
1365 SV **cb;
1366
1367 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB && cxstack_ix >= 0)
1368 {
1369 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1370
1371 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1372 {
1373 dSP;
1374 GV *gv = CvGV (cx->blk_sub.cv);
1375 SV *fullname = sv_2mortal (newSV (0));
1376
1377 if (isGV (gv))
1378 gv_efullname3 (fullname, gv, 0);
1379
1380 PL_runops = RUNOPS_DEFAULT;
1381 ENTER;
1382 SAVETMPS;
1383 EXTEND (SP, 3);
1384 PUSHMARK (SP);
1385 PUSHs (&PL_sv_yes);
1386 PUSHs (fullname);
1387 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1388 PUTBACK;
1389 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1390 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1391 SPAGAIN;
1392 FREETMPS;
1393 LEAVE;
1394 PL_runops = runops_trace;
1395 }
1396
1397 oldcxix = cxstack_ix;
1398 }
1399
1400 if (cctx_current->flags & CC_TRACE_LINE)
1401 {
1402 dSP;
1403
1404 PL_runops = RUNOPS_DEFAULT;
1405 ENTER;
1406 SAVETMPS;
1407 EXTEND (SP, 3);
1408 PL_runops = RUNOPS_DEFAULT;
1409 PUSHMARK (SP);
1410 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1411 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1412 PUTBACK;
1413 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1414 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1415 SPAGAIN;
1416 FREETMPS;
1417 LEAVE;
1418 PL_runops = runops_trace;
1419 }
1420 }
1421 }
1422 }
1423 }
1424
1425 TAINT_NOT;
1426 return 0;
1427}
1428
1429static struct CoroSLF cctx_ssl_frame;
1430
1431static void
1432slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1433{
1434 ta->prev = 0;
1435}
1436
1437static int
1438slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1439{
1440 *frame = cctx_ssl_frame;
1441
1442 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1443}
1444
1445/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1446static void ecb_noinline
1447cctx_prepare (pTHX)
1448{
630 PL_top_env = &PL_start_env; 1449 PL_top_env = &PL_start_env;
1450
1451 if (cctx_current->flags & CC_TRACE)
1452 PL_runops = runops_trace;
1453
1454 /* we already must be executing an SLF op, there is no other valid way
1455 * that can lead to creation of a new cctx */
1456 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1457 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1458
1459 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1460 cctx_ssl_frame = slf_frame;
1461
1462 slf_frame.prepare = slf_prepare_set_stacklevel;
1463 slf_frame.check = slf_check_set_stacklevel;
1464}
1465
1466/* the tail of transfer: execute stuff we can only do after a transfer */
1467ecb_inline void
1468transfer_tail (pTHX)
1469{
1470 free_coro_mortal (aTHX);
1471}
1472
1473/* try to exit the same way perl's main function would do */
1474/* we do not bother resetting the environment or other things *7
1475/* that are not, uhm, essential */
1476/* this obviously also doesn't work when perl is embedded */
1477static void ecb_noinline ecb_cold
1478perlish_exit (pTHX)
1479{
1480 int exitstatus = perl_destruct (PL_curinterp);
1481 perl_free (PL_curinterp);
1482 exit (exitstatus);
1483}
1484
1485/*
1486 * this is a _very_ stripped down perl interpreter ;)
1487 */
1488static void
1489cctx_run (void *arg)
1490{
1491#ifdef USE_ITHREADS
1492# if CORO_PTHREAD
1493 PERL_SET_CONTEXT (coro_thx);
1494# endif
1495#endif
1496 {
1497 dTHX;
1498
1499 /* normally we would need to skip the entersub here */
1500 /* not doing so will re-execute it, which is exactly what we want */
1501 /* PL_nop = PL_nop->op_next */
1502
631 /* inject call to cctx_init */ 1503 /* inject a fake subroutine call to cctx_init */
632 prepare_cctx ((coro_cctx *)arg); 1504 cctx_prepare (aTHX);
633 1505
1506 /* cctx_run is the alternative tail of transfer() */
1507 transfer_tail (aTHX);
1508
634 /* somebody will hit me for both perl_run and PL_restartop */ 1509 /* somebody or something will hit me for both perl_run and PL_restartop */
1510 PL_restartop = PL_op;
635 perl_run (PL_curinterp); 1511 perl_run (PL_curinterp);
1512 /*
1513 * Unfortunately, there is no way to get at the return values of the
1514 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1515 * runtime errors here, as this is just a random interpreter, not a thread.
1516 */
636 1517
637 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1518 /*
638 abort (); 1519 * If perl-run returns we assume exit() was being called or the coro
1520 * fell off the end, which seems to be the only valid (non-bug)
1521 * reason for perl_run to return. We try to mimic whatever perl is normally
1522 * doing in that case. YMMV.
1523 */
1524 perlish_exit (aTHX);
1525 }
639} 1526}
640 1527
641static coro_cctx * 1528static coro_cctx *
642cctx_new () 1529cctx_new (void)
643{ 1530{
644 coro_cctx *cctx; 1531 coro_cctx *cctx;
645 1532
1533 ++cctx_count;
646 New (0, cctx, 1, coro_cctx); 1534 New (0, cctx, 1, coro_cctx);
647 1535
648#if HAVE_MMAP 1536 cctx->gen = cctx_gen;
1537 cctx->flags = 0;
1538 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
649 1539
650 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1540 return cctx;
651 /* mmap suppsedly does allocate-on-write for us */ 1541}
652 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
653 1542
654 if (cctx->sptr == (void *)-1) 1543/* create a new cctx only suitable as source */
1544static coro_cctx *
1545cctx_new_empty (void)
1546{
1547 coro_cctx *cctx = cctx_new ();
1548
1549 cctx->stack.sptr = 0;
1550 coro_create (&cctx->cctx, 0, 0, 0, 0);
1551
1552 return cctx;
1553}
1554
1555/* create a new cctx suitable as destination/running a perl interpreter */
1556static coro_cctx *
1557cctx_new_run (void)
1558{
1559 coro_cctx *cctx = cctx_new ();
1560
1561 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
655 { 1562 {
656 perror ("FATAL: unable to mmap stack for coroutine"); 1563 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
657 _exit (EXIT_FAILURE); 1564 _exit (EXIT_FAILURE);
658 } 1565 }
659 1566
660# if STACKGUARD
661 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
662# endif
663
664#else
665
666 cctx->ssize = STACKSIZE * (long)sizeof (long);
667 New (0, cctx->sptr, STACKSIZE, long);
668
669 if (!cctx->sptr)
670 {
671 perror ("FATAL: unable to malloc stack for coroutine");
672 _exit (EXIT_FAILURE);
673 }
674
675#endif
676
677#if USE_VALGRIND
678 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
679 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
680 cctx->ssize + (char *)cctx->sptr
681 );
682#endif
683
684 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize); 1567 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
685 1568
686 return cctx; 1569 return cctx;
687} 1570}
688 1571
689static void 1572static void
690cctx_free (coro_cctx *cctx) 1573cctx_destroy (coro_cctx *cctx)
691{ 1574{
692 if (!cctx) 1575 if (!cctx)
693 return; 1576 return;
694 1577
695#if USE_VALGRIND 1578 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
696 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
697#endif
698 1579
699#if HAVE_MMAP 1580 --cctx_count;
700 munmap (cctx->sptr, cctx->ssize); 1581 coro_destroy (&cctx->cctx);
701#else 1582
702 Safefree (cctx->sptr); 1583 coro_stack_free (&cctx->stack);
703#endif
704 1584
705 Safefree (cctx); 1585 Safefree (cctx);
706} 1586}
707 1587
708static coro_cctx *cctx_first; 1588/* wether this cctx should be destructed */
709static int cctx_count, cctx_idle; 1589#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
710 1590
711static coro_cctx * 1591static coro_cctx *
712cctx_get () 1592cctx_get (pTHX)
713{ 1593{
714 coro_cctx *cctx; 1594 while (ecb_expect_true (cctx_first))
715
716 if (cctx_first)
717 { 1595 {
1596 coro_cctx *cctx = cctx_first;
1597 cctx_first = cctx->next;
718 --cctx_idle; 1598 --cctx_idle;
719 cctx = cctx_first; 1599
720 cctx_first = cctx->next; 1600 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
721 } 1601 return cctx;
722 else 1602
723 { 1603 cctx_destroy (cctx);
724 ++cctx_count;
725 cctx = cctx_new ();
726 PL_op = PL_op->op_next;
727 } 1604 }
728 1605
729 return cctx; 1606 return cctx_new_run ();
730} 1607}
731 1608
732static void 1609static void
733cctx_put (coro_cctx *cctx) 1610cctx_put (coro_cctx *cctx)
734{ 1611{
1612 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1613
1614 /* free another cctx if overlimit */
1615 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1616 {
1617 coro_cctx *first = cctx_first;
1618 cctx_first = first->next;
1619 --cctx_idle;
1620
1621 cctx_destroy (first);
1622 }
1623
735 ++cctx_idle; 1624 ++cctx_idle;
736 cctx->next = cctx_first; 1625 cctx->next = cctx_first;
737 cctx_first = cctx; 1626 cctx_first = cctx;
738} 1627}
739 1628
740/* never call directly, always through the coro_state_transfer global variable */ 1629/** coroutine switching *****************************************************/
741static void NOINLINE 1630
1631static void
1632transfer_check (pTHX_ struct coro *prev, struct coro *next)
1633{
1634 /* TODO: throwing up here is considered harmful */
1635
1636 if (ecb_expect_true (prev != next))
1637 {
1638 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1639 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1640
1641 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1642 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1643
1644#if !PERL_VERSION_ATLEAST (5,10,0)
1645 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1646 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1647#endif
1648 }
1649}
1650
1651/* always use the TRANSFER macro */
1652static void ecb_noinline /* noinline so we have a fixed stackframe */
742transfer (struct coro *prev, struct coro *next, int flags) 1653transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
743{ 1654{
744 dSTACKLEVEL; 1655 dSTACKLEVEL;
745 1656
746 /* sometimes transfer is only called to set idle_sp */ 1657 /* sometimes transfer is only called to set idle_sp */
747 if (flags == TRANSFER_SET_STACKLEVEL) 1658 if (ecb_expect_false (!prev))
1659 {
748 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1660 cctx_current->idle_sp = STACKLEVEL;
749 else if (prev != next) 1661 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
750 { 1662 }
1663 else if (ecb_expect_true (prev != next))
1664 {
751 coro_cctx *prev__cctx; 1665 coro_cctx *cctx_prev;
752 1666
753 LOCK; 1667 if (ecb_expect_false (prev->flags & CF_NEW))
754
755 if (next->mainstack)
756 { 1668 {
757 /* coroutine already started */ 1669 /* create a new empty/source context */
758 SAVE (prev, flags); 1670 prev->flags &= ~CF_NEW;
759 LOAD (next); 1671 prev->flags |= CF_RUNNING;
1672 }
1673
1674 prev->flags &= ~CF_RUNNING;
1675 next->flags |= CF_RUNNING;
1676
1677 /* first get rid of the old state */
1678 save_perl (aTHX_ prev);
1679
1680 if (ecb_expect_false (next->flags & CF_NEW))
1681 {
1682 /* need to start coroutine */
1683 next->flags &= ~CF_NEW;
1684 /* setup coroutine call */
1685 init_perl (aTHX_ next);
760 } 1686 }
761 else 1687 else
1688 load_perl (aTHX_ next);
1689
1690 /* possibly untie and reuse the cctx */
1691 if (ecb_expect_true (
1692 cctx_current->idle_sp == STACKLEVEL
1693 && !(cctx_current->flags & CC_TRACE)
1694 && !force_cctx
1695 ))
762 { 1696 {
763 /* need to start coroutine */ 1697 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
764 /* first get rid of the old state */ 1698 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
765 SAVE (prev, -1); 1699
766 /* setup coroutine call */ 1700 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
767 setup_coro (next); 1701 /* without this the next cctx_get might destroy the running cctx while still in use */
768 /* need a stack */ 1702 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
769 next->cctx = 0; 1703 if (ecb_expect_true (!next->cctx))
1704 next->cctx = cctx_get (aTHX);
1705
1706 cctx_put (cctx_current);
770 } 1707 }
1708 else
1709 prev->cctx = cctx_current;
771 1710
772 if (!prev->cctx) 1711 ++next->usecount;
773 /* create a new empty context */
774 Newz (0, prev->cctx, 1, coro_cctx);
775 1712
776 prev__cctx = prev->cctx; 1713 cctx_prev = cctx_current;
1714 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
777 1715
778 /* possibly "free" the cctx */ 1716 next->cctx = 0;
779 if (prev__cctx->idle_sp == STACKLEVEL) 1717
1718 if (ecb_expect_false (cctx_prev != cctx_current))
780 { 1719 {
781 cctx_put (prev__cctx); 1720 cctx_prev->top_env = PL_top_env;
782 prev->cctx = 0; 1721 PL_top_env = cctx_current->top_env;
1722 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
783 } 1723 }
784 1724
785 if (!next->cctx) 1725 transfer_tail (aTHX);
786 next->cctx = cctx_get ();
787
788 if (prev__cctx != next->cctx)
789 {
790 prev__cctx->top_env = PL_top_env;
791 PL_top_env = next->cctx->top_env;
792 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
793 }
794
795 free_coro_mortal ();
796
797 UNLOCK;
798 } 1726 }
799} 1727}
800 1728
801struct transfer_args 1729#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
802{
803 struct coro *prev, *next;
804 int flags;
805};
806
807#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags) 1730#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
808 1731
1732/** high level stuff ********************************************************/
1733
1734/* this function is actually Coro, not Coro::State, but we call it from here */
1735/* because it is convenient - but it hasn't been declared yet for that reason */
809static void 1736static void
1737coro_call_on_destroy (pTHX_ struct coro *coro);
1738
1739static void
810coro_state_destroy (struct coro *coro) 1740coro_state_destroy (pTHX_ struct coro *coro)
811{ 1741{
812 if (coro->refcnt--) 1742 if (coro->flags & CF_ZOMBIE)
813 return; 1743 return;
814 1744
815 if (coro->mainstack && coro->mainstack != main_mainstack) 1745 slf_destroy (aTHX_ coro);
816 {
817 struct coro temp;
818 1746
819 SAVE ((&temp), TRANSFER_SAVE_ALL); 1747 coro->flags |= CF_ZOMBIE;
820 LOAD (coro);
821 1748
822 coro_destroy_stacks (); 1749 if (coro->flags & CF_READY)
823
824 LOAD ((&temp)); /* this will get rid of defsv etc.. */
825
826 coro->mainstack = 0;
827 } 1750 {
1751 /* reduce nready, as destroying a ready coro effectively unreadies it */
1752 /* alternative: look through all ready queues and remove the coro */
1753 --coro_nready;
1754 }
1755 else
1756 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
828 1757
1758 if (coro->next) coro->next->prev = coro->prev;
1759 if (coro->prev) coro->prev->next = coro->next;
1760 if (coro == coro_first) coro_first = coro->next;
1761
1762 if (coro->mainstack
1763 && coro->mainstack != main_mainstack
1764 && coro->slot
1765 && !PL_dirty)
1766 destroy_perl (aTHX_ coro);
1767
829 cctx_free (coro->cctx); 1768 cctx_destroy (coro->cctx);
1769 SvREFCNT_dec (coro->startcv);
830 SvREFCNT_dec (coro->args); 1770 SvREFCNT_dec (coro->args);
831 Safefree (coro); 1771 SvREFCNT_dec (coro->swap_sv);
1772 SvREFCNT_dec (CORO_THROW);
1773
1774 coro_call_on_destroy (aTHX_ coro);
1775
1776 /* more destruction mayhem in coro_state_free */
832} 1777}
833 1778
834static int 1779static int
835coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1780coro_state_free (pTHX_ SV *sv, MAGIC *mg)
836{ 1781{
837 struct coro *coro = (struct coro *)mg->mg_ptr; 1782 struct coro *coro = (struct coro *)mg->mg_ptr;
838 mg->mg_ptr = 0; 1783 mg->mg_ptr = 0;
839 1784
840 coro_state_destroy (coro); 1785 coro_state_destroy (aTHX_ coro);
1786 SvREFCNT_dec (coro->on_destroy);
1787 SvREFCNT_dec (coro->status);
1788
1789 Safefree (coro);
841 1790
842 return 0; 1791 return 0;
843} 1792}
844 1793
845static int 1794static int ecb_cold
846coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1795coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
847{ 1796{
848 struct coro *coro = (struct coro *)mg->mg_ptr; 1797 /* called when perl clones the current process the slow way (windows process emulation) */
849 1798 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
850 ++coro->refcnt; 1799 mg->mg_ptr = 0;
1800 mg->mg_virtual = 0;
851 1801
852 return 0; 1802 return 0;
853} 1803}
854 1804
855static MGVTBL coro_state_vtbl = { 1805static MGVTBL coro_state_vtbl = {
856 0, 0, 0, 0, 1806 0, 0, 0, 0,
857 coro_state_clear, 1807 coro_state_free,
858 0, 1808 0,
859#ifdef MGf_DUP 1809#ifdef MGf_DUP
860 coro_state_dup, 1810 coro_state_dup,
861#else 1811#else
862# define MGf_DUP 0 1812# define MGf_DUP 0
863#endif 1813#endif
864}; 1814};
865 1815
866static struct coro *
867SvSTATE (SV *coro)
868{
869 HV *stash;
870 MAGIC *mg;
871
872 if (SvROK (coro))
873 coro = SvRV (coro);
874
875 stash = SvSTASH (coro);
876 if (stash != coro_stash && stash != coro_state_stash)
877 {
878 /* very slow, but rare, check */
879 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
880 croak ("Coro::State object required");
881 }
882
883 mg = SvMAGIC (coro);
884 assert (mg->mg_type == PERL_MAGIC_ext);
885 return (struct coro *)mg->mg_ptr;
886}
887
888static void 1816static void
889prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1817prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
890{ 1818{
891 ta->prev = SvSTATE (prev); 1819 ta->prev = SvSTATE (prev_sv);
892 ta->next = SvSTATE (next); 1820 ta->next = SvSTATE (next_sv);
893 ta->flags = flags; 1821 TRANSFER_CHECK (*ta);
894} 1822}
895 1823
896static void 1824static void
897api_transfer (SV *prev, SV *next, int flags) 1825api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1826{
1827 struct coro_transfer_args ta;
1828
1829 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1830 TRANSFER (ta, 1);
1831}
1832
1833/** Coro ********************************************************************/
1834
1835ecb_inline void
1836coro_enq (pTHX_ struct coro *coro)
1837{
1838 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1839
1840 SvREFCNT_inc_NN (coro->hv);
1841
1842 coro->next_ready = 0;
1843 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1844 ready [1] = coro;
1845}
1846
1847ecb_inline struct coro *
1848coro_deq (pTHX)
1849{
1850 int prio;
1851
1852 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1853 {
1854 struct coro **ready = coro_ready [prio];
1855
1856 if (ready [0])
1857 {
1858 struct coro *coro = ready [0];
1859 ready [0] = coro->next_ready;
1860 return coro;
1861 }
1862 }
1863
1864 return 0;
1865}
1866
1867static void
1868invoke_sv_ready_hook_helper (void)
898{ 1869{
899 dTHX; 1870 dTHX;
1871 dSP;
1872
1873 ENTER;
1874 SAVETMPS;
1875
1876 PUSHMARK (SP);
1877 PUTBACK;
1878 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1879
1880 FREETMPS;
1881 LEAVE;
1882}
1883
1884static int
1885api_ready (pTHX_ SV *coro_sv)
1886{
1887 struct coro *coro = SvSTATE (coro_sv);
1888
1889 if (coro->flags & CF_READY)
1890 return 0;
1891
1892 coro->flags |= CF_READY;
1893
1894 coro_enq (aTHX_ coro);
1895
1896 if (!coro_nready++)
1897 if (coroapi.readyhook)
1898 coroapi.readyhook ();
1899
1900 return 1;
1901}
1902
1903static int
1904api_is_ready (pTHX_ SV *coro_sv)
1905{
1906 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1907}
1908
1909/* expects to own a reference to next->hv */
1910ecb_inline void
1911prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1912{
1913 SV *prev_sv = SvRV (coro_current);
1914
1915 ta->prev = SvSTATE_hv (prev_sv);
1916 ta->next = next;
1917
1918 TRANSFER_CHECK (*ta);
1919
1920 SvRV_set (coro_current, (SV *)next->hv);
1921
1922 free_coro_mortal (aTHX);
1923 coro_mortal = prev_sv;
1924}
1925
1926static void
1927prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1928{
1929 for (;;)
1930 {
1931 struct coro *next = coro_deq (aTHX);
1932
1933 if (ecb_expect_true (next))
1934 {
1935 /* cannot transfer to destroyed coros, skip and look for next */
1936 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1937 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1938 else
1939 {
1940 next->flags &= ~CF_READY;
1941 --coro_nready;
1942
1943 prepare_schedule_to (aTHX_ ta, next);
1944 break;
1945 }
1946 }
1947 else
1948 {
1949 /* nothing to schedule: call the idle handler */
1950 if (SvROK (sv_idle)
1951 && SvOBJECT (SvRV (sv_idle)))
1952 {
1953 if (SvRV (sv_idle) == SvRV (coro_current))
1954 {
1955 require_pv ("Carp");
1956
1957 {
1958 dSP;
1959
1960 ENTER;
1961 SAVETMPS;
1962
1963 PUSHMARK (SP);
1964 XPUSHs (sv_2mortal (newSVpv ("FATAL: $Coro::idle blocked itself - did you try to block inside an event loop callback? Caught", 0)));
1965 PUTBACK;
1966 call_pv ("Carp::confess", G_VOID | G_DISCARD);
1967
1968 FREETMPS;
1969 LEAVE;
1970 }
1971 }
1972
1973 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1974 api_ready (aTHX_ SvRV (sv_idle));
1975 --coro_nready;
1976 }
1977 else
1978 {
1979 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1980 dSP;
1981
1982 ENTER;
1983 SAVETMPS;
1984
1985 PUSHMARK (SP);
1986 PUTBACK;
1987 call_sv (sv_idle, G_VOID | G_DISCARD);
1988
1989 FREETMPS;
1990 LEAVE;
1991 }
1992 }
1993 }
1994}
1995
1996ecb_inline void
1997prepare_cede (pTHX_ struct coro_transfer_args *ta)
1998{
1999 api_ready (aTHX_ coro_current);
2000 prepare_schedule (aTHX_ ta);
2001}
2002
2003ecb_inline void
2004prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
2005{
2006 SV *prev = SvRV (coro_current);
2007
2008 if (coro_nready)
2009 {
2010 prepare_schedule (aTHX_ ta);
2011 api_ready (aTHX_ prev);
2012 }
2013 else
2014 prepare_nop (aTHX_ ta);
2015}
2016
2017static void
2018api_schedule (pTHX)
2019{
900 struct transfer_args ta; 2020 struct coro_transfer_args ta;
901 2021
902 prepare_transfer (&ta, prev, next, flags); 2022 prepare_schedule (aTHX_ &ta);
903 TRANSFER (ta); 2023 TRANSFER (ta, 1);
904} 2024}
905 2025
906/** Coro ********************************************************************/ 2026static void
2027api_schedule_to (pTHX_ SV *coro_sv)
2028{
2029 struct coro_transfer_args ta;
2030 struct coro *next = SvSTATE (coro_sv);
907 2031
908#define PRIO_MAX 3 2032 SvREFCNT_inc_NN (coro_sv);
909#define PRIO_HIGH 1 2033 prepare_schedule_to (aTHX_ &ta, next);
910#define PRIO_NORMAL 0 2034}
911#define PRIO_LOW -1
912#define PRIO_IDLE -3
913#define PRIO_MIN -4
914 2035
915/* for Coro.pm */
916static GV *coro_current, *coro_idle;
917static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
918static int coro_nready;
919
920static void 2036static int
921coro_enq (SV *sv) 2037api_cede (pTHX)
922{ 2038{
923 int prio; 2039 struct coro_transfer_args ta;
924 2040
925 if (SvTYPE (sv) != SVt_PVHV) 2041 prepare_cede (aTHX_ &ta);
926 croak ("Coro::ready tried to enqueue something that is not a coroutine");
927 2042
928 prio = SvSTATE (sv)->prio; 2043 if (ecb_expect_true (ta.prev != ta.next))
2044 {
2045 TRANSFER (ta, 1);
2046 return 1;
2047 }
2048 else
2049 return 0;
2050}
929 2051
930 av_push (coro_ready [prio - PRIO_MIN], sv); 2052static int
2053api_cede_notself (pTHX)
2054{
931 coro_nready++; 2055 if (coro_nready)
932} 2056 {
2057 struct coro_transfer_args ta;
933 2058
934static SV * 2059 prepare_cede_notself (aTHX_ &ta);
935coro_deq (int min_prio) 2060 TRANSFER (ta, 1);
936{ 2061 return 1;
937 int prio = PRIO_MAX - PRIO_MIN; 2062 }
2063 else
2064 return 0;
2065}
938 2066
939 min_prio -= PRIO_MIN; 2067static void
940 if (min_prio < 0) 2068api_trace (pTHX_ SV *coro_sv, int flags)
941 min_prio = 0; 2069{
2070 struct coro *coro = SvSTATE (coro_sv);
942 2071
943 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2072 if (coro->flags & CF_RUNNING)
944 if (AvFILLp (coro_ready [prio]) >= 0) 2073 croak ("cannot enable tracing on a running coroutine, caught");
2074
2075 if (flags & CC_TRACE)
2076 {
2077 if (!coro->cctx)
2078 coro->cctx = cctx_new_run ();
2079 else if (!(coro->cctx->flags & CC_TRACE))
2080 croak ("cannot enable tracing on coroutine with custom stack, caught");
2081
2082 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2083 }
2084 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2085 {
2086 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2087
2088 if (coro->flags & CF_RUNNING)
2089 PL_runops = RUNOPS_DEFAULT;
2090 else
2091 coro->slot->runops = RUNOPS_DEFAULT;
2092 }
2093}
2094
2095static void
2096coro_push_av (pTHX_ AV *av, I32 gimme_v)
2097{
2098 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2099 {
2100 dSP;
2101
2102 if (gimme_v == G_SCALAR)
2103 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2104 else
945 { 2105 {
946 coro_nready--; 2106 int i;
947 return av_shift (coro_ready [prio]); 2107 EXTEND (SP, AvFILLp (av) + 1);
2108
2109 for (i = 0; i <= AvFILLp (av); ++i)
2110 PUSHs (AvARRAY (av)[i]);
948 } 2111 }
2112
2113 PUTBACK;
2114 }
2115}
2116
2117static void
2118coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2119{
2120 if (!coro->on_destroy)
2121 coro->on_destroy = newAV ();
2122
2123 av_push (coro->on_destroy, cb);
2124}
2125
2126static void
2127slf_destroy_join (pTHX_ struct CoroSLF *frame)
2128{
2129 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2130}
2131
2132static int
2133slf_check_join (pTHX_ struct CoroSLF *frame)
2134{
2135 struct coro *coro = (struct coro *)frame->data;
2136
2137 if (!coro->status)
2138 return 1;
2139
2140 frame->destroy = 0;
2141
2142 coro_push_av (aTHX_ coro->status, GIMME_V);
2143
2144 SvREFCNT_dec ((SV *)coro->hv);
949 2145
950 return 0; 2146 return 0;
951} 2147}
952 2148
953static void 2149static void
954api_ready (SV *coro) 2150slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
955{ 2151{
956 dTHX; 2152 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
957 2153
958 if (SvROK (coro)) 2154 if (items > 1)
959 coro = SvRV (coro); 2155 croak ("join called with too many arguments");
960 2156
961 LOCK; 2157 if (coro->status)
962 coro_enq (SvREFCNT_inc (coro)); 2158 frame->prepare = prepare_nop;
963 UNLOCK; 2159 else
964} 2160 {
965 2161 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
966static void 2162 frame->prepare = prepare_schedule;
967prepare_schedule (struct transfer_args *ta)
968{
969 SV *current, *prev, *next;
970
971 current = GvSV (coro_current);
972
973 for (;;)
974 { 2163 }
975 LOCK;
976 next = coro_deq (PRIO_MIN);
977 UNLOCK;
978 2164
2165 frame->check = slf_check_join;
2166 frame->destroy = slf_destroy_join;
2167 frame->data = (void *)coro;
2168 SvREFCNT_inc (coro->hv);
2169}
2170
2171static void
2172coro_call_on_destroy (pTHX_ struct coro *coro)
2173{
2174 AV *od = coro->on_destroy;
2175
2176 if (!od)
2177 return;
2178
2179 coro->on_destroy = 0;
2180 sv_2mortal ((SV *)od);
2181
2182 while (AvFILLp (od) >= 0)
2183 {
2184 SV *cb = sv_2mortal (av_pop (od));
2185
2186 /* coro hv's (and only hv's at the moment) are supported as well */
2187 if (SvSTATEhv_p (aTHX_ cb))
2188 api_ready (aTHX_ cb);
2189 else
2190 {
2191 dSP; /* don't disturb outer sp */
2192 PUSHMARK (SP);
2193
2194 if (coro->status)
2195 {
2196 PUTBACK;
2197 coro_push_av (aTHX_ coro->status, G_ARRAY);
2198 SPAGAIN;
2199 }
2200
2201 PUTBACK;
2202 call_sv (cb, G_VOID | G_DISCARD);
2203 }
2204 }
2205}
2206
2207static void
2208coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2209{
2210 AV *av;
2211
2212 if (coro->status)
2213 {
2214 av = coro->status;
2215 av_clear (av);
2216 }
2217 else
2218 av = coro->status = newAV ();
2219
2220 /* items are actually not so common, so optimise for this case */
2221 if (items)
2222 {
2223 int i;
2224
2225 av_extend (av, items - 1);
2226
2227 for (i = 0; i < items; ++i)
2228 av_push (av, SvREFCNT_inc_NN (arg [i]));
2229 }
2230}
2231
2232static void
2233slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2234{
2235 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2236 api_ready (aTHX_ sv_manager);
2237
2238 frame->prepare = prepare_schedule;
2239 frame->check = slf_check_repeat;
2240
2241 /* as a minor optimisation, we could unwind all stacks here */
2242 /* but that puts extra pressure on pp_slf, and is not worth much */
2243 /*coro_unwind_stacks (aTHX);*/
2244}
2245
2246static void
2247slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2248{
2249 HV *coro_hv = (HV *)SvRV (coro_current);
2250
2251 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2252 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2253}
2254
2255static void
2256slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2257{
2258 HV *coro_hv;
2259 struct coro *coro;
2260
2261 if (items <= 0)
2262 croak ("Coro::cancel called without coro object,");
2263
2264 coro = SvSTATE (arg [0]);
2265 coro_hv = coro->hv;
2266
2267 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2268
2269 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2270 {
2271 /* coro currently busy cancelling something, so just notify it */
2272 coro->slf_frame.data = (void *)coro;
2273
2274 frame->prepare = prepare_nop;
2275 frame->check = slf_check_nop;
2276 }
2277 else if (coro_hv == (HV *)SvRV (coro_current))
2278 {
2279 /* cancelling the current coro is allowed, and equals terminate */
2280 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2281 }
2282 else
2283 {
2284 struct coro *self = SvSTATE_current;
2285
979 if (next) 2286 if (!self)
980 break; 2287 croak ("Coro::cancel called outside of thread content,");
2288
2289 /* otherwise we cancel directly, purely for speed reasons
2290 * unfortunately, this requires some magic trickery, as
2291 * somebody else could cancel us, so we have to fight the cancellation.
2292 * this is ugly, and hopefully fully worth the extra speed.
2293 * besides, I can't get the slow-but-safe version working...
2294 */
2295 slf_frame.data = 0;
2296 self->flags |= CF_NOCANCEL;
2297 coro_state_destroy (aTHX_ coro);
2298 self->flags &= ~CF_NOCANCEL;
2299
2300 if (slf_frame.data)
2301 {
2302 /* while we were busy we have been cancelled, so terminate */
2303 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2304 }
2305 else
2306 {
2307 frame->prepare = prepare_nop;
2308 frame->check = slf_check_nop;
2309 }
2310 }
2311}
2312
2313static int
2314slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2315{
2316 frame->prepare = 0;
2317 coro_unwind_stacks (aTHX);
2318
2319 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2320
2321 return 1;
2322}
2323
2324static int
2325safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2326{
2327 if (coro->cctx)
2328 croak ("coro inside C callback, unable to cancel at this time, caught");
2329
2330 if (coro->flags & CF_NEW)
2331 {
2332 coro_set_status (aTHX_ coro, arg, items);
2333 coro_state_destroy (aTHX_ coro);
2334 }
2335 else
2336 {
2337 if (!coro->slf_frame.prepare)
2338 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2339
2340 slf_destroy (aTHX_ coro);
2341
2342 coro_set_status (aTHX_ coro, arg, items);
2343 coro->slf_frame.prepare = prepare_nop;
2344 coro->slf_frame.check = slf_check_safe_cancel;
2345
2346 api_ready (aTHX_ (SV *)coro->hv);
2347 }
2348
2349 return 1;
2350}
2351
2352/*****************************************************************************/
2353/* async pool handler */
2354
2355static int
2356slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2357{
2358 HV *hv = (HV *)SvRV (coro_current);
2359 struct coro *coro = (struct coro *)frame->data;
2360
2361 if (!coro->invoke_cb)
2362 return 1; /* loop till we have invoke */
2363 else
2364 {
2365 hv_store (hv, "desc", sizeof ("desc") - 1,
2366 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2367
2368 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
981 2369
982 { 2370 {
983 dSP; 2371 dSP;
984 2372 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
985 ENTER;
986 SAVETMPS;
987
988 PUSHMARK (SP);
989 PUTBACK; 2373 PUTBACK;
990 call_sv (GvSV (coro_idle), G_DISCARD);
991
992 FREETMPS;
993 LEAVE;
994 } 2374 }
2375
2376 SvREFCNT_dec (GvAV (PL_defgv));
2377 GvAV (PL_defgv) = coro->invoke_av;
2378 coro->invoke_av = 0;
2379
2380 return 0;
2381 }
2382}
2383
2384static void
2385slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2386{
2387 HV *hv = (HV *)SvRV (coro_current);
2388 struct coro *coro = SvSTATE_hv ((SV *)hv);
2389
2390 if (ecb_expect_true (coro->saved_deffh))
995 } 2391 {
2392 /* subsequent iteration */
2393 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2394 coro->saved_deffh = 0;
996 2395
997 prev = SvRV (current); 2396 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
998 SvRV (current) = next; 2397 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2398 {
2399 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2400 return;
2401 }
2402 else
2403 {
2404 av_clear (GvAV (PL_defgv));
2405 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
999 2406
1000 /* free this only after the transfer */ 2407 coro->prio = 0;
1001 LOCK;
1002 free_coro_mortal ();
1003 UNLOCK;
1004 coro_mortal = prev;
1005 2408
1006 ta->prev = SvSTATE (prev); 2409 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1007 ta->next = SvSTATE (next); 2410 api_trace (aTHX_ coro_current, 0);
1008 ta->flags = TRANSFER_SAVE_ALL;
1009}
1010 2411
2412 frame->prepare = prepare_schedule;
2413 av_push (av_async_pool, SvREFCNT_inc (hv));
2414 }
2415 }
2416 else
2417 {
2418 /* first iteration, simply fall through */
2419 frame->prepare = prepare_nop;
2420 }
2421
2422 frame->check = slf_check_pool_handler;
2423 frame->data = (void *)coro;
2424}
2425
2426/*****************************************************************************/
2427/* rouse callback */
2428
2429#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2430
2431static void
2432coro_rouse_callback (pTHX_ CV *cv)
2433{
2434 dXSARGS;
2435 SV *data = (SV *)S_GENSUB_ARG;
2436
2437 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2438 {
2439 /* first call, set args */
2440 SV *coro = SvRV (data);
2441 AV *av = newAV ();
2442
2443 SvRV_set (data, (SV *)av);
2444
2445 /* better take a full copy of the arguments */
2446 while (items--)
2447 av_store (av, items, newSVsv (ST (items)));
2448
2449 api_ready (aTHX_ coro);
2450 SvREFCNT_dec (coro);
2451 }
2452
2453 XSRETURN_EMPTY;
2454}
2455
1011static void 2456static int
2457slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2458{
2459 SV *data = (SV *)frame->data;
2460
2461 if (CORO_THROW)
2462 return 0;
2463
2464 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2465 return 1;
2466
2467 /* now push all results on the stack */
2468 {
2469 dSP;
2470 AV *av = (AV *)SvRV (data);
2471 int i;
2472
2473 EXTEND (SP, AvFILLp (av) + 1);
2474 for (i = 0; i <= AvFILLp (av); ++i)
2475 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2476
2477 /* we have stolen the elements, so set length to zero and free */
2478 AvFILLp (av) = -1;
2479 av_undef (av);
2480
2481 PUTBACK;
2482 }
2483
2484 return 0;
2485}
2486
2487static void
2488slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2489{
2490 SV *cb;
2491
2492 if (items)
2493 cb = arg [0];
2494 else
2495 {
2496 struct coro *coro = SvSTATE_current;
2497
2498 if (!coro->rouse_cb)
2499 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2500
2501 cb = sv_2mortal (coro->rouse_cb);
2502 coro->rouse_cb = 0;
2503 }
2504
2505 if (!SvROK (cb)
2506 || SvTYPE (SvRV (cb)) != SVt_PVCV
2507 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2508 croak ("Coro::rouse_wait called with illegal callback argument,");
2509
2510 {
2511 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2512 SV *data = (SV *)S_GENSUB_ARG;
2513
2514 frame->data = (void *)data;
2515 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2516 frame->check = slf_check_rouse_wait;
2517 }
2518}
2519
2520static SV *
2521coro_new_rouse_cb (pTHX)
2522{
2523 HV *hv = (HV *)SvRV (coro_current);
2524 struct coro *coro = SvSTATE_hv (hv);
2525 SV *data = newRV_inc ((SV *)hv);
2526 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2527
2528 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2529 SvREFCNT_dec (data); /* magicext increases the refcount */
2530
2531 SvREFCNT_dec (coro->rouse_cb);
2532 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2533
2534 return cb;
2535}
2536
2537/*****************************************************************************/
2538/* schedule-like-function opcode (SLF) */
2539
2540static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2541static const CV *slf_cv;
2542static SV **slf_argv;
2543static int slf_argc, slf_arga; /* count, allocated */
2544static I32 slf_ax; /* top of stack, for restore */
2545
2546/* this restores the stack in the case we patched the entersub, to */
2547/* recreate the stack frame as perl will on following calls */
2548/* since entersub cleared the stack */
2549static OP *
2550pp_restore (pTHX)
2551{
2552 int i;
2553 SV **SP = PL_stack_base + slf_ax;
2554
2555 PUSHMARK (SP);
2556
2557 EXTEND (SP, slf_argc + 1);
2558
2559 for (i = 0; i < slf_argc; ++i)
2560 PUSHs (sv_2mortal (slf_argv [i]));
2561
2562 PUSHs ((SV *)CvGV (slf_cv));
2563
2564 RETURNOP (slf_restore.op_first);
2565}
2566
2567static void
2568slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2569{
2570 SV **arg = (SV **)slf_frame.data;
2571
2572 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2573}
2574
2575static void
2576slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2577{
2578 if (items != 2)
2579 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2580
2581 frame->prepare = slf_prepare_transfer;
2582 frame->check = slf_check_nop;
2583 frame->data = (void *)arg; /* let's hope it will stay valid */
2584}
2585
2586static void
2587slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2588{
2589 frame->prepare = prepare_schedule;
2590 frame->check = slf_check_nop;
2591}
2592
2593static void
1012prepare_cede (struct transfer_args *ta) 2594slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
1013{ 2595{
1014 LOCK; 2596 struct coro *next = (struct coro *)slf_frame.data;
1015 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
1016 UNLOCK;
1017 2597
2598 SvREFCNT_inc_NN (next->hv);
1018 prepare_schedule (ta); 2599 prepare_schedule_to (aTHX_ ta, next);
1019} 2600}
1020 2601
1021static void 2602static void
1022api_schedule (void) 2603slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1023{ 2604{
1024 dTHX; 2605 if (!items)
2606 croak ("Coro::schedule_to expects a coroutine argument, caught");
2607
2608 frame->data = (void *)SvSTATE (arg [0]);
2609 frame->prepare = slf_prepare_schedule_to;
2610 frame->check = slf_check_nop;
2611}
2612
2613static void
2614slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2615{
2616 api_ready (aTHX_ SvRV (coro_current));
2617
2618 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2619}
2620
2621static void
2622slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2623{
2624 frame->prepare = prepare_cede;
2625 frame->check = slf_check_nop;
2626}
2627
2628static void
2629slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2630{
2631 frame->prepare = prepare_cede_notself;
2632 frame->check = slf_check_nop;
2633}
2634
2635/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2636static void
2637slf_destroy (pTHX_ struct coro *coro)
2638{
2639 struct CoroSLF frame = coro->slf_frame;
2640
2641 /*
2642 * The on_destroy below most likely is from an SLF call.
2643 * Since by definition the SLF call will not finish when we destroy
2644 * the coro, we will have to force-finish it here, otherwise
2645 * cleanup functions cannot call SLF functions.
2646 */
2647 coro->slf_frame.prepare = 0;
2648
2649 /* this callback is reserved for slf functions needing to do cleanup */
2650 if (frame.destroy && frame.prepare && !PL_dirty)
2651 frame.destroy (aTHX_ &frame);
2652}
2653
2654/*
2655 * these not obviously related functions are all rolled into one
2656 * function to increase chances that they all will call transfer with the same
2657 * stack offset
2658 * SLF stands for "schedule-like-function".
2659 */
2660static OP *
2661pp_slf (pTHX)
2662{
2663 I32 checkmark; /* mark SP to see how many elements check has pushed */
2664
2665 /* set up the slf frame, unless it has already been set-up */
2666 /* the latter happens when a new coro has been started */
2667 /* or when a new cctx was attached to an existing coroutine */
2668 if (ecb_expect_true (!slf_frame.prepare))
2669 {
2670 /* first iteration */
2671 dSP;
2672 SV **arg = PL_stack_base + TOPMARK + 1;
2673 int items = SP - arg; /* args without function object */
2674 SV *gv = *sp;
2675
2676 /* do a quick consistency check on the "function" object, and if it isn't */
2677 /* for us, divert to the real entersub */
2678 if (SvTYPE (gv) != SVt_PVGV
2679 || !GvCV (gv)
2680 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2681 return PL_ppaddr[OP_ENTERSUB](aTHX);
2682
2683 if (!(PL_op->op_flags & OPf_STACKED))
2684 {
2685 /* ampersand-form of call, use @_ instead of stack */
2686 AV *av = GvAV (PL_defgv);
2687 arg = AvARRAY (av);
2688 items = AvFILLp (av) + 1;
2689 }
2690
2691 /* now call the init function, which needs to set up slf_frame */
2692 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2693 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2694
2695 /* pop args */
2696 SP = PL_stack_base + POPMARK;
2697
2698 PUTBACK;
2699 }
2700
2701 /* now that we have a slf_frame, interpret it! */
2702 /* we use a callback system not to make the code needlessly */
2703 /* complicated, but so we can run multiple perl coros from one cctx */
2704
2705 do
2706 {
1025 struct transfer_args ta; 2707 struct coro_transfer_args ta;
1026 2708
1027 prepare_schedule (&ta); 2709 slf_frame.prepare (aTHX_ &ta);
1028 TRANSFER (ta); 2710 TRANSFER (ta, 0);
1029}
1030 2711
2712 checkmark = PL_stack_sp - PL_stack_base;
2713 }
2714 while (slf_frame.check (aTHX_ &slf_frame));
2715
2716 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2717
2718 /* exception handling */
2719 if (ecb_expect_false (CORO_THROW))
2720 {
2721 SV *exception = sv_2mortal (CORO_THROW);
2722
2723 CORO_THROW = 0;
2724 sv_setsv (ERRSV, exception);
2725 croak (0);
2726 }
2727
2728 /* return value handling - mostly like entersub */
2729 /* make sure we put something on the stack in scalar context */
2730 if (GIMME_V == G_SCALAR
2731 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2732 {
2733 dSP;
2734 SV **bot = PL_stack_base + checkmark;
2735
2736 if (sp == bot) /* too few, push undef */
2737 bot [1] = &PL_sv_undef;
2738 else /* too many, take last one */
2739 bot [1] = *sp;
2740
2741 SP = bot + 1;
2742
2743 PUTBACK;
2744 }
2745
2746 return NORMAL;
2747}
2748
2749static void
2750api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2751{
2752 int i;
2753 SV **arg = PL_stack_base + ax;
2754 int items = PL_stack_sp - arg + 1;
2755
2756 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2757
2758 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2759 && PL_op->op_ppaddr != pp_slf)
2760 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2761
2762 CvFLAGS (cv) |= CVf_SLF;
2763 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2764 slf_cv = cv;
2765
2766 /* we patch the op, and then re-run the whole call */
2767 /* we have to put the same argument on the stack for this to work */
2768 /* and this will be done by pp_restore */
2769 slf_restore.op_next = (OP *)&slf_restore;
2770 slf_restore.op_type = OP_CUSTOM;
2771 slf_restore.op_ppaddr = pp_restore;
2772 slf_restore.op_first = PL_op;
2773
2774 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2775
2776 if (PL_op->op_flags & OPf_STACKED)
2777 {
2778 if (items > slf_arga)
2779 {
2780 slf_arga = items;
2781 Safefree (slf_argv);
2782 New (0, slf_argv, slf_arga, SV *);
2783 }
2784
2785 slf_argc = items;
2786
2787 for (i = 0; i < items; ++i)
2788 slf_argv [i] = SvREFCNT_inc (arg [i]);
2789 }
2790 else
2791 slf_argc = 0;
2792
2793 PL_op->op_ppaddr = pp_slf;
2794 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2795
2796 PL_op = (OP *)&slf_restore;
2797}
2798
2799/*****************************************************************************/
2800/* dynamic wind */
2801
2802static void
2803on_enterleave_call (pTHX_ SV *cb)
2804{
2805 dSP;
2806
2807 PUSHSTACK;
2808
2809 PUSHMARK (SP);
2810 PUTBACK;
2811 call_sv (cb, G_VOID | G_DISCARD);
2812 SPAGAIN;
2813
2814 POPSTACK;
2815}
2816
2817static SV *
2818coro_avp_pop_and_free (pTHX_ AV **avp)
2819{
2820 AV *av = *avp;
2821 SV *res = av_pop (av);
2822
2823 if (AvFILLp (av) < 0)
2824 {
2825 *avp = 0;
2826 SvREFCNT_dec (av);
2827 }
2828
2829 return res;
2830}
2831
2832static void
2833coro_pop_on_enter (pTHX_ void *coro)
2834{
2835 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2836 SvREFCNT_dec (cb);
2837}
2838
2839static void
2840coro_pop_on_leave (pTHX_ void *coro)
2841{
2842 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2843 on_enterleave_call (aTHX_ sv_2mortal (cb));
2844}
2845
2846static void
2847enterleave_hook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, void *arg)
2848{
2849 if (!hook)
2850 return;
2851
2852 if (!*avp)
2853 {
2854 *avp = newAV ();
2855 AvREAL_off (*avp);
2856 }
2857
2858 av_push (*avp, (SV *)hook);
2859 av_push (*avp, (SV *)arg);
2860}
2861
2862static void
2863enterleave_unhook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, int execute)
2864{
2865 AV *av = *avp;
2866 int i;
2867
2868 if (!av)
2869 return;
2870
2871 for (i = AvFILLp (av) - 1; i >= 0; i -= 2)
2872 if (AvARRAY (av)[i] == (SV *)hook)
2873 {
2874 if (execute)
2875 hook ((void *)AvARRAY (av)[i + 1]);
2876
2877 memmove (AvARRAY (av) + i, AvARRAY (av) + i + 2, AvFILLp (av) - i - 1);
2878 av_pop (av);
2879 av_pop (av);
2880 break;
2881 }
2882
2883 if (AvFILLp (av) >= 0)
2884 {
2885 *avp = 0;
2886 SvREFCNT_dec_NN (av);
2887 }
2888}
2889
2890static void
2891api_enterleave_hook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2892{
2893 struct coro *coro = SvSTATE (coro_sv);
2894
2895 if (SvSTATE_current == coro)
2896 if (enter)
2897 enter (aTHX enter_arg);
2898
2899 enterleave_hook_xs (aTHX_ coro, &coro->on_enter_xs, enter, enter_arg);
2900 enterleave_hook_xs (aTHX_ coro, &coro->on_leave_xs, leave, leave_arg);
2901}
2902
2903static void
2904api_enterleave_unhook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, coro_enterleave_hook leave)
2905{
2906 struct coro *coro = SvSTATE (coro_sv);
2907
2908 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2909 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, SvSTATE_current == coro);
2910}
2911
2912static void
2913savedestructor_unhook_enter (pTHX_ coro_enterleave_hook enter)
2914{
2915 struct coro *coro = SvSTATE_current;
2916
2917 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2918}
2919
2920static void
2921savedestructor_unhook_leave (pTHX_ coro_enterleave_hook leave)
2922{
2923 struct coro *coro = SvSTATE_current;
2924
2925 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, 1);
2926}
2927
2928static void
2929api_enterleave_scope_hook (pTHX_ coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2930{
2931 api_enterleave_hook (aTHX_ coro_current, enter, enter_arg, leave, leave_arg);
2932
2933 /* this ought to be much cheaper than malloc + a single destructor call */
2934 if (enter) SAVEDESTRUCTOR_X (savedestructor_unhook_enter, enter);
2935 if (leave) SAVEDESTRUCTOR_X (savedestructor_unhook_leave, leave);
2936}
2937
2938/*****************************************************************************/
2939/* PerlIO::cede */
2940
2941typedef struct
2942{
2943 PerlIOBuf base;
2944 NV next, every;
2945} PerlIOCede;
2946
2947static IV ecb_cold
2948PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2949{
2950 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2951
2952 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2953 self->next = nvtime () + self->every;
2954
2955 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2956}
2957
2958static SV * ecb_cold
2959PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2960{
2961 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2962
2963 return newSVnv (self->every);
2964}
2965
2966static IV
2967PerlIOCede_flush (pTHX_ PerlIO *f)
2968{
2969 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2970 double now = nvtime ();
2971
2972 if (now >= self->next)
2973 {
2974 api_cede (aTHX);
2975 self->next = now + self->every;
2976 }
2977
2978 return PerlIOBuf_flush (aTHX_ f);
2979}
2980
2981static PerlIO_funcs PerlIO_cede =
2982{
2983 sizeof(PerlIO_funcs),
2984 "cede",
2985 sizeof(PerlIOCede),
2986 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2987 PerlIOCede_pushed,
2988 PerlIOBuf_popped,
2989 PerlIOBuf_open,
2990 PerlIOBase_binmode,
2991 PerlIOCede_getarg,
2992 PerlIOBase_fileno,
2993 PerlIOBuf_dup,
2994 PerlIOBuf_read,
2995 PerlIOBuf_unread,
2996 PerlIOBuf_write,
2997 PerlIOBuf_seek,
2998 PerlIOBuf_tell,
2999 PerlIOBuf_close,
3000 PerlIOCede_flush,
3001 PerlIOBuf_fill,
3002 PerlIOBase_eof,
3003 PerlIOBase_error,
3004 PerlIOBase_clearerr,
3005 PerlIOBase_setlinebuf,
3006 PerlIOBuf_get_base,
3007 PerlIOBuf_bufsiz,
3008 PerlIOBuf_get_ptr,
3009 PerlIOBuf_get_cnt,
3010 PerlIOBuf_set_ptrcnt,
3011};
3012
3013/*****************************************************************************/
3014/* Coro::Semaphore & Coro::Signal */
3015
3016static SV *
3017coro_waitarray_new (pTHX_ int count)
3018{
3019 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
3020 AV *av = newAV ();
3021 SV **ary;
3022
3023 /* unfortunately, building manually saves memory */
3024 Newx (ary, 2, SV *);
3025 AvALLOC (av) = ary;
3026#if PERL_VERSION_ATLEAST (5,10,0)
3027 AvARRAY (av) = ary;
3028#else
3029 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
3030 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
3031 SvPVX ((SV *)av) = (char *)ary;
3032#endif
3033 AvMAX (av) = 1;
3034 AvFILLp (av) = 0;
3035 ary [0] = newSViv (count);
3036
3037 return newRV_noinc ((SV *)av);
3038}
3039
3040/* semaphore */
3041
3042static void
3043coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
3044{
3045 SV *count_sv = AvARRAY (av)[0];
3046 IV count = SvIVX (count_sv);
3047
3048 count += adjust;
3049 SvIVX (count_sv) = count;
3050
3051 /* now wake up as many waiters as are expected to lock */
3052 while (count > 0 && AvFILLp (av) > 0)
3053 {
3054 SV *cb;
3055
3056 /* swap first two elements so we can shift a waiter */
3057 AvARRAY (av)[0] = AvARRAY (av)[1];
3058 AvARRAY (av)[1] = count_sv;
3059 cb = av_shift (av);
3060
3061 if (SvOBJECT (cb))
3062 {
3063 api_ready (aTHX_ cb);
3064 --count;
3065 }
3066 else if (SvTYPE (cb) == SVt_PVCV)
3067 {
3068 dSP;
3069 PUSHMARK (SP);
3070 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3071 PUTBACK;
3072 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3073 }
3074
3075 SvREFCNT_dec_NN (cb);
3076 }
3077}
3078
3079static void
3080coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
3081{
3082 /* call $sem->adjust (0) to possibly wake up some other waiters */
3083 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
3084}
3085
1031static void 3086static int
1032api_cede (void) 3087slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
1033{ 3088{
1034 dTHX; 3089 AV *av = (AV *)frame->data;
1035 struct transfer_args ta; 3090 SV *count_sv = AvARRAY (av)[0];
3091 SV *coro_hv = SvRV (coro_current);
1036 3092
1037 prepare_cede (&ta); 3093 frame->destroy = 0;
1038 TRANSFER (ta);
1039}
1040 3094
3095 /* if we are about to throw, don't actually acquire the lock, just throw */
3096 if (ecb_expect_false (CORO_THROW))
3097 {
3098 /* we still might be responsible for the semaphore, so wake up others */
3099 coro_semaphore_adjust (aTHX_ av, 0);
3100
3101 return 0;
3102 }
3103 else if (SvIVX (count_sv) > 0)
3104 {
3105 if (acquire)
3106 SvIVX (count_sv) = SvIVX (count_sv) - 1;
3107 else
3108 coro_semaphore_adjust (aTHX_ av, 0);
3109
3110 return 0;
3111 }
3112 else
3113 {
3114 int i;
3115 /* if we were woken up but can't down, we look through the whole */
3116 /* waiters list and only add us if we aren't in there already */
3117 /* this avoids some degenerate memory usage cases */
3118 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
3119 if (AvARRAY (av)[i] == coro_hv)
3120 return 1;
3121
3122 av_push (av, SvREFCNT_inc (coro_hv));
3123 return 1;
3124 }
3125}
3126
3127static int
3128slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
3129{
3130 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
3131}
3132
3133static int
3134slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
3135{
3136 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3137}
3138
3139static void
3140slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3141{
3142 AV *av = (AV *)SvRV (arg [0]);
3143
3144 if (SvIVX (AvARRAY (av)[0]) > 0)
3145 {
3146 frame->data = (void *)av;
3147 frame->prepare = prepare_nop;
3148 }
3149 else
3150 {
3151 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3152
3153 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3154 frame->prepare = prepare_schedule;
3155 /* to avoid race conditions when a woken-up coro gets terminated */
3156 /* we arrange for a temporary on_destroy that calls adjust (0) */
3157 frame->destroy = coro_semaphore_destroy;
3158 }
3159}
3160
3161static void
3162slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3163{
3164 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3165 frame->check = slf_check_semaphore_down;
3166}
3167
3168static void
3169slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3170{
3171 if (items >= 2)
3172 {
3173 /* callback form */
3174 AV *av = (AV *)SvRV (arg [0]);
3175 SV *cb_cv = s_get_cv_croak (arg [1]);
3176
3177 av_push (av, SvREFCNT_inc_NN (cb_cv));
3178
3179 if (SvIVX (AvARRAY (av)[0]) > 0)
3180 coro_semaphore_adjust (aTHX_ av, 0);
3181
3182 frame->prepare = prepare_nop;
3183 frame->check = slf_check_nop;
3184 }
3185 else
3186 {
3187 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3188 frame->check = slf_check_semaphore_wait;
3189 }
3190}
3191
3192/* signal */
3193
3194static void
3195coro_signal_wake (pTHX_ AV *av, int count)
3196{
3197 SvIVX (AvARRAY (av)[0]) = 0;
3198
3199 /* now signal count waiters */
3200 while (count > 0 && AvFILLp (av) > 0)
3201 {
3202 SV *cb;
3203
3204 /* swap first two elements so we can shift a waiter */
3205 cb = AvARRAY (av)[0];
3206 AvARRAY (av)[0] = AvARRAY (av)[1];
3207 AvARRAY (av)[1] = cb;
3208
3209 cb = av_shift (av);
3210
3211 if (SvTYPE (cb) == SVt_PVCV)
3212 {
3213 dSP;
3214 PUSHMARK (SP);
3215 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3216 PUTBACK;
3217 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3218 }
3219 else
3220 {
3221 api_ready (aTHX_ cb);
3222 sv_setiv (cb, 0); /* signal waiter */
3223 }
3224
3225 SvREFCNT_dec_NN (cb);
3226
3227 --count;
3228 }
3229}
3230
3231static int
3232slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3233{
3234 /* if we are about to throw, also stop waiting */
3235 return SvROK ((SV *)frame->data) && !CORO_THROW;
3236}
3237
3238static void
3239slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3240{
3241 AV *av = (AV *)SvRV (arg [0]);
3242
3243 if (items >= 2)
3244 {
3245 SV *cb_cv = s_get_cv_croak (arg [1]);
3246 av_push (av, SvREFCNT_inc_NN (cb_cv));
3247
3248 if (SvIVX (AvARRAY (av)[0]))
3249 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3250
3251 frame->prepare = prepare_nop;
3252 frame->check = slf_check_nop;
3253 }
3254 else if (SvIVX (AvARRAY (av)[0]))
3255 {
3256 SvIVX (AvARRAY (av)[0]) = 0;
3257 frame->prepare = prepare_nop;
3258 frame->check = slf_check_nop;
3259 }
3260 else
3261 {
3262 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3263
3264 av_push (av, waiter);
3265
3266 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3267 frame->prepare = prepare_schedule;
3268 frame->check = slf_check_signal_wait;
3269 }
3270}
3271
3272/*****************************************************************************/
3273/* Coro::AIO */
3274
3275#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3276
3277/* helper storage struct */
3278struct io_state
3279{
3280 int errorno;
3281 I32 laststype; /* U16 in 5.10.0 */
3282 int laststatval;
3283 Stat_t statcache;
3284};
3285
3286static void
3287coro_aio_callback (pTHX_ CV *cv)
3288{
3289 dXSARGS;
3290 AV *state = (AV *)S_GENSUB_ARG;
3291 SV *coro = av_pop (state);
3292 SV *data_sv = newSV (sizeof (struct io_state));
3293
3294 av_extend (state, items - 1);
3295
3296 sv_upgrade (data_sv, SVt_PV);
3297 SvCUR_set (data_sv, sizeof (struct io_state));
3298 SvPOK_only (data_sv);
3299
3300 {
3301 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3302
3303 data->errorno = errno;
3304 data->laststype = PL_laststype;
3305 data->laststatval = PL_laststatval;
3306 data->statcache = PL_statcache;
3307 }
3308
3309 /* now build the result vector out of all the parameters and the data_sv */
3310 {
3311 int i;
3312
3313 for (i = 0; i < items; ++i)
3314 av_push (state, SvREFCNT_inc_NN (ST (i)));
3315 }
3316
3317 av_push (state, data_sv);
3318
3319 api_ready (aTHX_ coro);
3320 SvREFCNT_dec_NN (coro);
3321 SvREFCNT_dec_NN ((AV *)state);
3322}
3323
3324static int
3325slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3326{
3327 AV *state = (AV *)frame->data;
3328
3329 /* if we are about to throw, return early */
3330 /* this does not cancel the aio request, but at least */
3331 /* it quickly returns */
3332 if (CORO_THROW)
3333 return 0;
3334
3335 /* one element that is an RV? repeat! */
3336 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
3337 return 1;
3338
3339 /* restore status */
3340 {
3341 SV *data_sv = av_pop (state);
3342 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3343
3344 errno = data->errorno;
3345 PL_laststype = data->laststype;
3346 PL_laststatval = data->laststatval;
3347 PL_statcache = data->statcache;
3348
3349 SvREFCNT_dec_NN (data_sv);
3350 }
3351
3352 /* push result values */
3353 {
3354 dSP;
3355 int i;
3356
3357 EXTEND (SP, AvFILLp (state) + 1);
3358 for (i = 0; i <= AvFILLp (state); ++i)
3359 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3360
3361 PUTBACK;
3362 }
3363
3364 return 0;
3365}
3366
3367static void
3368slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3369{
3370 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3371 SV *coro_hv = SvRV (coro_current);
3372 struct coro *coro = SvSTATE_hv (coro_hv);
3373
3374 /* put our coroutine id on the state arg */
3375 av_push (state, SvREFCNT_inc_NN (coro_hv));
3376
3377 /* first see whether we have a non-zero priority and set it as AIO prio */
3378 if (coro->prio)
3379 {
3380 dSP;
3381
3382 static SV *prio_cv;
3383 static SV *prio_sv;
3384
3385 if (ecb_expect_false (!prio_cv))
3386 {
3387 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3388 prio_sv = newSViv (0);
3389 }
3390
3391 PUSHMARK (SP);
3392 sv_setiv (prio_sv, coro->prio);
3393 XPUSHs (prio_sv);
3394
3395 PUTBACK;
3396 call_sv (prio_cv, G_VOID | G_DISCARD);
3397 }
3398
3399 /* now call the original request */
3400 {
3401 dSP;
3402 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3403 int i;
3404
3405 PUSHMARK (SP);
3406
3407 /* first push all args to the stack */
3408 EXTEND (SP, items + 1);
3409
3410 for (i = 0; i < items; ++i)
3411 PUSHs (arg [i]);
3412
3413 /* now push the callback closure */
3414 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3415
3416 /* now call the AIO function - we assume our request is uncancelable */
3417 PUTBACK;
3418 call_sv ((SV *)req, G_VOID | G_DISCARD);
3419 }
3420
3421 /* now that the request is going, we loop till we have a result */
3422 frame->data = (void *)state;
3423 frame->prepare = prepare_schedule;
3424 frame->check = slf_check_aio_req;
3425}
3426
3427static void
3428coro_aio_req_xs (pTHX_ CV *cv)
3429{
3430 dXSARGS;
3431
3432 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3433
3434 XSRETURN_EMPTY;
3435}
3436
3437/*****************************************************************************/
3438
3439#if CORO_CLONE
3440# include "clone.c"
3441#endif
3442
3443/*****************************************************************************/
3444
3445static SV *
3446coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3447{
3448 SV *coro_sv;
3449 struct coro *coro;
3450 MAGIC *mg;
3451 HV *hv;
3452 SV *cb;
3453 int i;
3454
3455 if (argc > 0)
3456 {
3457 cb = s_get_cv_croak (argv [0]);
3458
3459 if (!is_coro)
3460 {
3461 if (CvISXSUB (cb))
3462 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3463
3464 if (!CvROOT (cb))
3465 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3466 }
3467 }
3468
3469 Newz (0, coro, 1, struct coro);
3470 coro->args = newAV ();
3471 coro->flags = CF_NEW;
3472
3473 if (coro_first) coro_first->prev = coro;
3474 coro->next = coro_first;
3475 coro_first = coro;
3476
3477 coro->hv = hv = newHV ();
3478 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3479 mg->mg_flags |= MGf_DUP;
3480 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3481
3482 if (argc > 0)
3483 {
3484 av_extend (coro->args, argc + is_coro - 1);
3485
3486 if (is_coro)
3487 {
3488 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3489 cb = (SV *)cv_coro_run;
3490 }
3491
3492 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3493
3494 for (i = 1; i < argc; i++)
3495 av_push (coro->args, newSVsv (argv [i]));
3496 }
3497
3498 return coro_sv;
3499}
3500
3501#ifndef __cplusplus
3502ecb_cold XS(boot_Coro__State);
3503#endif
3504
3505#if CORO_JIT
3506
3507static void ecb_noinline ecb_cold
3508pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3509{
3510 dSP;
3511 AV *av = newAV ();
3512
3513 av_store (av, 3, newSVuv (d));
3514 av_store (av, 2, newSVuv (c));
3515 av_store (av, 1, newSVuv (b));
3516 av_store (av, 0, newSVuv (a));
3517
3518 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3519
3520 PUTBACK;
3521}
3522
3523static void ecb_noinline ecb_cold
3524jit_init (pTHX)
3525{
3526 dSP;
3527 SV *load, *save;
3528 char *map_base;
3529 char *load_ptr, *save_ptr;
3530 STRLEN load_len, save_len, map_len;
3531 int count;
3532
3533 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3534
3535 PUSHMARK (SP);
3536 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3537 #include "state.h"
3538 count = call_pv ("Coro::State::_jit", G_ARRAY);
3539 SPAGAIN;
3540
3541 save = POPs; save_ptr = SvPVbyte (save, save_len);
3542 load = POPs; load_ptr = SvPVbyte (load, load_len);
3543
3544 map_len = load_len + save_len + 16;
3545
3546 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3547
3548 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3549
3550 load_perl_slots = (load_save_perl_slots_type)map_base;
3551 memcpy (map_base, load_ptr, load_len);
3552
3553 map_base += (load_len + 15) & ~15;
3554
3555 save_perl_slots = (load_save_perl_slots_type)map_base;
3556 memcpy (map_base, save_ptr, save_len);
3557
3558 /* we are good citizens and try to make the page read-only, so the evil evil */
3559 /* hackers might have it a bit more difficult */
3560 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3561
3562 PUTBACK;
3563 eval_pv ("undef &Coro::State::_jit", 1);
3564}
3565
3566#endif
3567
1041MODULE = Coro::State PACKAGE = Coro::State 3568MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1042 3569
1043PROTOTYPES: DISABLE 3570PROTOTYPES: DISABLE
1044 3571
1045BOOT: 3572BOOT:
1046{ 3573{
3574#define VARx(name,expr,type) if (sizeof (type) < sizeof (expr)) croak ("FATAL: Coro thread context slot '" # name "' too small for this version of perl.");
3575#include "state.h"
1047#ifdef USE_ITHREADS 3576#ifdef USE_ITHREADS
1048 MUTEX_INIT (&coro_mutex); 3577# if CORO_PTHREAD
3578 coro_thx = PERL_GET_CONTEXT;
1049#endif 3579# endif
1050 BOOT_PAGESIZE; 3580#endif
3581 /* perl defines these to check for existance first, but why it doesn't */
3582 /* just create them one at init time is not clear to me, except for */
3583 /* programs trying to delete them, but... */
3584 /* anyway, we declare this as invalid and make sure they are initialised here */
3585 DEFSV;
3586 ERRSV;
3587
3588 cctx_current = cctx_new_empty ();
3589
3590 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3591 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3592
3593 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3594 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3595 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3596
3597 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3598 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3599 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1051 3600
1052 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3601 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1053 3602
1054 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3603 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1055 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3604 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1056 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3605 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
3606 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1057 3607
1058 main_mainstack = PL_mainstack; 3608 main_mainstack = PL_mainstack;
3609 main_top_env = PL_top_env;
1059 3610
3611 while (main_top_env->je_prev)
3612 main_top_env = main_top_env->je_prev;
3613
3614 {
3615 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3616
3617 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3618 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3619
3620 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3621 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3622 }
3623
1060 coroapi.ver = CORO_API_VERSION; 3624 coroapi.ver = CORO_API_VERSION;
3625 coroapi.rev = CORO_API_REVISION;
3626
1061 coroapi.transfer = api_transfer; 3627 coroapi.transfer = api_transfer;
1062 3628
3629 coroapi.sv_state = SvSTATE_;
3630 coroapi.execute_slf = api_execute_slf;
3631 coroapi.prepare_nop = prepare_nop;
3632 coroapi.prepare_schedule = prepare_schedule;
3633 coroapi.prepare_cede = prepare_cede;
3634 coroapi.prepare_cede_notself = prepare_cede_notself;
3635
3636 time_init (aTHX);
3637
1063 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3638 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3639#if CORO_JIT
3640 PUTBACK;
3641 jit_init (aTHX);
3642 SPAGAIN;
3643#endif
1064} 3644}
1065 3645
1066SV * 3646SV *
1067new (char *klass, ...) 3647new (SV *klass, ...)
3648 ALIAS:
3649 Coro::new = 1
1068 CODE: 3650 CODE:
1069{ 3651 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1070 struct coro *coro; 3652 OUTPUT:
1071 HV *hv;
1072 int i;
1073
1074 Newz (0, coro, 1, struct coro);
1075 coro->args = newAV ();
1076
1077 hv = newHV ();
1078 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1079 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1080
1081 for (i = 1; i < items; i++)
1082 av_push (coro->args, newSVsv (ST (i)));
1083}
1084 OUTPUT:
1085 RETVAL 3653 RETVAL
1086 3654
1087void 3655void
1088_set_stacklevel (...) 3656transfer (...)
1089 ALIAS: 3657 PROTOTYPE: $$
1090 Coro::State::transfer = 1 3658 CODE:
1091 Coro::schedule = 2 3659 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1092 Coro::cede = 3
1093 Coro::Cont::yield = 4
1094 CODE:
1095{
1096 struct transfer_args ta;
1097 3660
1098 switch (ix) 3661SV *
3662clone (Coro::State coro)
3663 CODE:
3664{
3665#if CORO_CLONE
3666 struct coro *ncoro = coro_clone (aTHX_ coro);
3667 MAGIC *mg;
3668 /* TODO: too much duplication */
3669 ncoro->hv = newHV ();
3670 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3671 mg->mg_flags |= MGf_DUP;
3672 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3673#else
3674 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3675#endif
3676}
3677 OUTPUT:
3678 RETVAL
3679
3680int
3681cctx_stacksize (int new_stacksize = 0)
3682 PROTOTYPE: ;$
3683 CODE:
3684 RETVAL = cctx_stacksize;
3685 if (new_stacksize)
1099 { 3686 {
1100 case 0: 3687 cctx_stacksize = new_stacksize;
1101 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 3688 ++cctx_gen;
1102 ta.next = 0;
1103 ta.flags = TRANSFER_SET_STACKLEVEL;
1104 break;
1105
1106 case 1:
1107 if (items != 3)
1108 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1109
1110 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1111 break;
1112
1113 case 2:
1114 prepare_schedule (&ta);
1115 break;
1116
1117 case 3:
1118 prepare_cede (&ta);
1119 break;
1120
1121 case 4:
1122 {
1123 SV *yieldstack;
1124 SV *sv;
1125 AV *defav = GvAV (PL_defgv);
1126
1127 yieldstack = *hv_fetch (
1128 (HV *)SvRV (GvSV (coro_current)),
1129 "yieldstack", sizeof ("yieldstack") - 1,
1130 0
1131 );
1132
1133 /* set up @_ -- ugly */
1134 av_clear (defav);
1135 av_fill (defav, items - 1);
1136 while (items--)
1137 av_store (defav, items, SvREFCNT_inc (ST(items)));
1138
1139 sv = av_pop ((AV *)SvRV (yieldstack));
1140 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1141 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1142 ta.flags = 0;
1143 SvREFCNT_dec (sv);
1144 }
1145 break;
1146
1147 } 3689 }
3690 OUTPUT:
3691 RETVAL
1148 3692
1149 TRANSFER (ta); 3693int
1150} 3694cctx_max_idle (int max_idle = 0)
1151 3695 PROTOTYPE: ;$
1152void
1153_clone_state_from (SV *dst, SV *src)
1154 CODE: 3696 CODE:
1155{ 3697 RETVAL = cctx_max_idle;
1156 struct coro *coro_src = SvSTATE (src); 3698 if (max_idle > 1)
1157 3699 cctx_max_idle = max_idle;
1158 sv_unmagic (SvRV (dst), PERL_MAGIC_ext); 3700 OUTPUT:
1159 3701 RETVAL
1160 ++coro_src->refcnt;
1161 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1162}
1163
1164void
1165_exit (code)
1166 int code
1167 PROTOTYPE: $
1168 CODE:
1169 _exit (code);
1170 3702
1171int 3703int
1172cctx_count () 3704cctx_count ()
3705 PROTOTYPE:
1173 CODE: 3706 CODE:
1174 RETVAL = cctx_count; 3707 RETVAL = cctx_count;
1175 OUTPUT: 3708 OUTPUT:
1176 RETVAL 3709 RETVAL
1177 3710
1178int 3711int
1179cctx_idle () 3712cctx_idle ()
3713 PROTOTYPE:
1180 CODE: 3714 CODE:
1181 RETVAL = cctx_idle; 3715 RETVAL = cctx_idle;
1182 OUTPUT: 3716 OUTPUT:
1183 RETVAL 3717 RETVAL
1184 3718
3719void
3720list ()
3721 PROTOTYPE:
3722 PPCODE:
3723{
3724 struct coro *coro;
3725 for (coro = coro_first; coro; coro = coro->next)
3726 if (coro->hv)
3727 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3728}
3729
3730void
3731call (Coro::State coro, SV *coderef)
3732 ALIAS:
3733 eval = 1
3734 CODE:
3735{
3736 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3737 {
3738 struct coro *current = SvSTATE_current;
3739 struct CoroSLF slf_save;
3740
3741 if (current != coro)
3742 {
3743 PUTBACK;
3744 save_perl (aTHX_ current);
3745 load_perl (aTHX_ coro);
3746 /* the coro is most likely in an active SLF call.
3747 * while not strictly required (the code we execute is
3748 * not allowed to call any SLF functions), it's cleaner
3749 * to reinitialise the slf_frame and restore it later.
3750 * This might one day allow us to actually do SLF calls
3751 * from code executed here.
3752 */
3753 slf_save = slf_frame;
3754 slf_frame.prepare = 0;
3755 SPAGAIN;
3756 }
3757
3758 PUSHSTACK;
3759
3760 PUSHMARK (SP);
3761 PUTBACK;
3762
3763 if (ix)
3764 eval_sv (coderef, 0);
3765 else
3766 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3767
3768 POPSTACK;
3769 SPAGAIN;
3770
3771 if (current != coro)
3772 {
3773 PUTBACK;
3774 slf_frame = slf_save;
3775 save_perl (aTHX_ coro);
3776 load_perl (aTHX_ current);
3777 SPAGAIN;
3778 }
3779 }
3780}
3781
3782SV *
3783is_ready (Coro::State coro)
3784 PROTOTYPE: $
3785 ALIAS:
3786 is_ready = CF_READY
3787 is_running = CF_RUNNING
3788 is_new = CF_NEW
3789 is_destroyed = CF_ZOMBIE
3790 is_zombie = CF_ZOMBIE
3791 is_suspended = CF_SUSPENDED
3792 CODE:
3793 RETVAL = boolSV (coro->flags & ix);
3794 OUTPUT:
3795 RETVAL
3796
3797void
3798throw (SV *self, SV *exception = &PL_sv_undef)
3799 PROTOTYPE: $;$
3800 CODE:
3801{
3802 struct coro *coro = SvSTATE (self);
3803 struct coro *current = SvSTATE_current;
3804 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3805 SvREFCNT_dec (*exceptionp);
3806 SvGETMAGIC (exception);
3807 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3808
3809 api_ready (aTHX_ self);
3810}
3811
3812void
3813api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3814 PROTOTYPE: $;$
3815 C_ARGS: aTHX_ coro, flags
3816
3817SV *
3818has_cctx (Coro::State coro)
3819 PROTOTYPE: $
3820 CODE:
3821 /* maybe manage the running flag differently */
3822 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3823 OUTPUT:
3824 RETVAL
3825
3826int
3827is_traced (Coro::State coro)
3828 PROTOTYPE: $
3829 CODE:
3830 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3831 OUTPUT:
3832 RETVAL
3833
3834UV
3835rss (Coro::State coro)
3836 PROTOTYPE: $
3837 ALIAS:
3838 usecount = 1
3839 CODE:
3840 switch (ix)
3841 {
3842 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3843 case 1: RETVAL = coro->usecount; break;
3844 }
3845 OUTPUT:
3846 RETVAL
3847
3848void
3849force_cctx ()
3850 PROTOTYPE:
3851 CODE:
3852 cctx_current->idle_sp = 0;
3853
3854void
3855swap_defsv (Coro::State self)
3856 PROTOTYPE: $
3857 ALIAS:
3858 swap_defav = 1
3859 CODE:
3860 if (!self->slot)
3861 croak ("cannot swap state with coroutine that has no saved state,");
3862 else
3863 {
3864 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3865 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3866
3867 SV *tmp = *src; *src = *dst; *dst = tmp;
3868 }
3869
3870void
3871cancel (Coro::State self)
3872 CODE:
3873 coro_state_destroy (aTHX_ self);
3874
3875SV *
3876enable_times (int enabled = enable_times)
3877 CODE:
3878{
3879 RETVAL = boolSV (enable_times);
3880
3881 if (enabled != enable_times)
3882 {
3883 enable_times = enabled;
3884
3885 coro_times_update ();
3886 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3887 }
3888}
3889 OUTPUT:
3890 RETVAL
3891
3892void
3893times (Coro::State self)
3894 PPCODE:
3895{
3896 struct coro *current = SvSTATE (coro_current);
3897
3898 if (ecb_expect_false (current == self))
3899 {
3900 coro_times_update ();
3901 coro_times_add (SvSTATE (coro_current));
3902 }
3903
3904 EXTEND (SP, 2);
3905 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3906 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3907
3908 if (ecb_expect_false (current == self))
3909 coro_times_sub (SvSTATE (coro_current));
3910}
3911
3912void
3913swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3914 CODE:
3915{
3916 struct coro *current = SvSTATE_current;
3917
3918 if (current == coro)
3919 SWAP_SVS (current);
3920
3921 if (!coro->swap_sv)
3922 coro->swap_sv = newAV ();
3923
3924 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3925 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3926
3927 if (current == coro)
3928 SWAP_SVS (current);
3929}
3930
3931
1185MODULE = Coro::State PACKAGE = Coro 3932MODULE = Coro::State PACKAGE = Coro
1186 3933
1187BOOT: 3934BOOT:
1188{ 3935{
1189 int i; 3936 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3937 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3938 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3939 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3940 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3941 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3942 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3943 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1190 3944
3945 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3946 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3947 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3948 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3949
1191 coro_stash = gv_stashpv ("Coro", TRUE); 3950 coro_stash = gv_stashpv ("Coro", TRUE);
1192 3951
1193 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3952 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1194 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3953 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1195 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3954 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1196 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3955 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1197 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3956 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1198 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3957 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1199
1200 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1201 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1202
1203 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1204 coro_ready[i] = newAV ();
1205 3958
1206 { 3959 {
1207 SV *sv = perl_get_sv("Coro::API", 1); 3960 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1208 3961
1209 coroapi.schedule = api_schedule; 3962 coroapi.schedule = api_schedule;
3963 coroapi.schedule_to = api_schedule_to;
1210 coroapi.cede = api_cede; 3964 coroapi.cede = api_cede;
3965 coroapi.cede_notself = api_cede_notself;
1211 coroapi.ready = api_ready; 3966 coroapi.ready = api_ready;
3967 coroapi.is_ready = api_is_ready;
1212 coroapi.nready = &coro_nready; 3968 coroapi.nready = coro_nready;
1213 coroapi.current = coro_current; 3969 coroapi.current = coro_current;
1214 3970
3971 coroapi.enterleave_hook = api_enterleave_hook;
3972 coroapi.enterleave_unhook = api_enterleave_unhook;
3973 coroapi.enterleave_scope_hook = api_enterleave_scope_hook;
3974
1215 GCoroAPI = &coroapi; 3975 /*GCoroAPI = &coroapi;*/
1216 sv_setiv (sv, (IV)&coroapi); 3976 sv_setiv (sv, (IV)&coroapi);
1217 SvREADONLY_on (sv); 3977 SvREADONLY_on (sv);
1218 } 3978 }
1219} 3979}
1220 3980
3981SV *
3982async (...)
3983 PROTOTYPE: &@
3984 CODE:
3985 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3986 api_ready (aTHX_ RETVAL);
3987 OUTPUT:
3988 RETVAL
3989
3990void
3991_destroy (Coro::State coro)
3992 CODE:
3993 /* used by the manager thread */
3994 coro_state_destroy (aTHX_ coro);
3995
3996void
3997on_destroy (Coro::State coro, SV *cb)
3998 CODE:
3999 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
4000
4001void
4002join (...)
4003 CODE:
4004 CORO_EXECUTE_SLF_XS (slf_init_join);
4005
4006void
4007terminate (...)
4008 CODE:
4009 CORO_EXECUTE_SLF_XS (slf_init_terminate);
4010
4011void
4012cancel (...)
4013 CODE:
4014 CORO_EXECUTE_SLF_XS (slf_init_cancel);
4015
4016int
4017safe_cancel (Coro::State self, ...)
4018 C_ARGS: aTHX_ self, &ST (1), items - 1
4019
4020void
4021schedule (...)
4022 CODE:
4023 CORO_EXECUTE_SLF_XS (slf_init_schedule);
4024
4025void
4026schedule_to (...)
4027 CODE:
4028 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
4029
4030void
4031cede_to (...)
4032 CODE:
4033 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
4034
4035void
4036cede (...)
4037 CODE:
4038 CORO_EXECUTE_SLF_XS (slf_init_cede);
4039
4040void
4041cede_notself (...)
4042 CODE:
4043 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
4044
4045void
4046_set_current (SV *current)
4047 PROTOTYPE: $
4048 CODE:
4049 SvREFCNT_dec_NN (SvRV (coro_current));
4050 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
4051
4052void
4053_set_readyhook (SV *hook)
4054 PROTOTYPE: $
4055 CODE:
4056 SvREFCNT_dec (coro_readyhook);
4057 SvGETMAGIC (hook);
4058 if (SvOK (hook))
4059 {
4060 coro_readyhook = newSVsv (hook);
4061 CORO_READYHOOK = invoke_sv_ready_hook_helper;
4062 }
4063 else
4064 {
4065 coro_readyhook = 0;
4066 CORO_READYHOOK = 0;
4067 }
4068
1221int 4069int
1222prio (Coro::State coro, int newprio = 0) 4070prio (Coro::State coro, int newprio = 0)
4071 PROTOTYPE: $;$
1223 ALIAS: 4072 ALIAS:
1224 nice = 1 4073 nice = 1
1225 CODE: 4074 CODE:
1226{ 4075{
1227 RETVAL = coro->prio; 4076 RETVAL = coro->prio;
1228 4077
1229 if (items > 1) 4078 if (items > 1)
1230 { 4079 {
1231 if (ix) 4080 if (ix)
1232 newprio += coro->prio; 4081 newprio = coro->prio - newprio;
1233 4082
1234 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 4083 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1235 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 4084 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1236 4085
1237 coro->prio = newprio; 4086 coro->prio = newprio;
1238 } 4087 }
1239} 4088}
4089 OUTPUT:
4090 RETVAL
1240 4091
1241void 4092SV *
1242ready (SV *self) 4093ready (SV *self)
1243 PROTOTYPE: $ 4094 PROTOTYPE: $
1244 CODE: 4095 CODE:
1245 api_ready (self); 4096 RETVAL = boolSV (api_ready (aTHX_ self));
4097 OUTPUT:
4098 RETVAL
1246 4099
1247int 4100int
1248nready (...) 4101nready (...)
1249 PROTOTYPE: 4102 PROTOTYPE:
1250 CODE: 4103 CODE:
1251 RETVAL = coro_nready; 4104 RETVAL = coro_nready;
1252 OUTPUT: 4105 OUTPUT:
1253 RETVAL 4106 RETVAL
1254 4107
1255MODULE = Coro::State PACKAGE = Coro::AIO 4108void
4109suspend (Coro::State self)
4110 PROTOTYPE: $
4111 CODE:
4112 self->flags |= CF_SUSPENDED;
4113
4114void
4115resume (Coro::State self)
4116 PROTOTYPE: $
4117 CODE:
4118 self->flags &= ~CF_SUSPENDED;
4119
4120void
4121_pool_handler (...)
4122 CODE:
4123 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
4124
4125void
4126async_pool (SV *cv, ...)
4127 PROTOTYPE: &@
4128 PPCODE:
4129{
4130 HV *hv = (HV *)av_pop (av_async_pool);
4131 AV *av = newAV ();
4132 SV *cb = ST (0);
4133 int i;
4134
4135 av_extend (av, items - 2);
4136 for (i = 1; i < items; ++i)
4137 av_push (av, SvREFCNT_inc_NN (ST (i)));
4138
4139 if ((SV *)hv == &PL_sv_undef)
4140 {
4141 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
4142 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
4143 SvREFCNT_dec_NN (sv);
4144 }
4145
4146 {
4147 struct coro *coro = SvSTATE_hv (hv);
4148
4149 assert (!coro->invoke_cb);
4150 assert (!coro->invoke_av);
4151 coro->invoke_cb = SvREFCNT_inc (cb);
4152 coro->invoke_av = av;
4153 }
4154
4155 api_ready (aTHX_ (SV *)hv);
4156
4157 if (GIMME_V != G_VOID)
4158 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4159 else
4160 SvREFCNT_dec_NN (hv);
4161}
1256 4162
1257SV * 4163SV *
1258_get_state () 4164rouse_cb ()
4165 PROTOTYPE:
1259 CODE: 4166 CODE:
1260{ 4167 RETVAL = coro_new_rouse_cb (aTHX);
1261 struct {
1262 int errorno;
1263 int laststype;
1264 int laststatval;
1265 Stat_t statcache;
1266 } data;
1267
1268 data.errorno = errno;
1269 data.laststype = PL_laststype;
1270 data.laststatval = PL_laststatval;
1271 data.statcache = PL_statcache;
1272
1273 RETVAL = newSVpvn ((char *)&data, sizeof data);
1274}
1275 OUTPUT: 4168 OUTPUT:
1276 RETVAL 4169 RETVAL
1277 4170
1278void 4171void
1279_set_state (char *data_) 4172rouse_wait (...)
4173 PROTOTYPE: ;$
4174 PPCODE:
4175 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4176
4177void
4178on_enter (SV *block)
4179 ALIAS:
4180 on_leave = 1
1280 PROTOTYPE: $ 4181 PROTOTYPE: &
1281 CODE: 4182 CODE:
1282{ 4183{
1283 struct { 4184 struct coro *coro = SvSTATE_current;
4185 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
4186
4187 block = s_get_cv_croak (block);
4188
4189 if (!*avp)
4190 *avp = newAV ();
4191
4192 av_push (*avp, SvREFCNT_inc (block));
4193
4194 if (!ix)
4195 on_enterleave_call (aTHX_ block);
4196
4197 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4198 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4199 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4200}
4201
4202
4203MODULE = Coro::State PACKAGE = PerlIO::cede
4204
4205BOOT:
4206 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4207
4208
4209MODULE = Coro::State PACKAGE = Coro::Semaphore
4210
4211SV *
4212new (SV *klass, SV *count = 0)
4213 CODE:
4214{
4215 int semcnt = 1;
4216
4217 if (count)
4218 {
4219 SvGETMAGIC (count);
4220
4221 if (SvOK (count))
4222 semcnt = SvIV (count);
4223 }
4224
4225 RETVAL = sv_bless (
4226 coro_waitarray_new (aTHX_ semcnt),
4227 GvSTASH (CvGV (cv))
4228 );
4229}
4230 OUTPUT:
4231 RETVAL
4232
4233# helper for Coro::Channel and others
4234SV *
4235_alloc (int count)
4236 CODE:
4237 RETVAL = coro_waitarray_new (aTHX_ count);
4238 OUTPUT:
4239 RETVAL
4240
4241SV *
4242count (SV *self)
4243 CODE:
4244 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4245 OUTPUT:
4246 RETVAL
4247
4248void
4249up (SV *self, int adjust = 1)
4250 ALIAS:
4251 adjust = 1
4252 CODE:
4253 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4254
4255void
4256down (...)
4257 CODE:
4258 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4259
4260void
4261wait (...)
4262 CODE:
4263 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4264
4265void
4266try (SV *self)
4267 PPCODE:
4268{
4269 AV *av = (AV *)SvRV (self);
4270 SV *count_sv = AvARRAY (av)[0];
4271 IV count = SvIVX (count_sv);
4272
4273 if (count > 0)
4274 {
4275 --count;
4276 SvIVX (count_sv) = count;
4277 XSRETURN_YES;
4278 }
4279 else
4280 XSRETURN_NO;
4281}
4282
4283void
4284waiters (SV *self)
4285 PPCODE:
4286{
4287 AV *av = (AV *)SvRV (self);
4288 int wcount = AvFILLp (av) + 1 - 1;
4289
4290 if (GIMME_V == G_SCALAR)
4291 XPUSHs (sv_2mortal (newSViv (wcount)));
4292 else
4293 {
1284 int errorno; 4294 int i;
1285 int laststype; 4295 EXTEND (SP, wcount);
1286 int laststatval; 4296 for (i = 1; i <= wcount; ++i)
1287 Stat_t statcache; 4297 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1288 } *data = (void *)data_; 4298 }
1289
1290 errno = data->errorno;
1291 PL_laststype = data->laststype;
1292 PL_laststatval = data->laststatval;
1293 PL_statcache = data->statcache;
1294} 4299}
4300
4301MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4302
4303void
4304_may_delete (SV *sem, int count, unsigned int extra_refs)
4305 PPCODE:
4306{
4307 AV *av = (AV *)SvRV (sem);
4308
4309 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4310 && AvFILLp (av) == 0 /* no waiters, just count */
4311 && SvIV (AvARRAY (av)[0]) == count)
4312 XSRETURN_YES;
4313
4314 XSRETURN_NO;
4315}
4316
4317MODULE = Coro::State PACKAGE = Coro::Signal
4318
4319SV *
4320new (SV *klass)
4321 CODE:
4322 RETVAL = sv_bless (
4323 coro_waitarray_new (aTHX_ 0),
4324 GvSTASH (CvGV (cv))
4325 );
4326 OUTPUT:
4327 RETVAL
4328
4329void
4330wait (...)
4331 CODE:
4332 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4333
4334void
4335broadcast (SV *self)
4336 CODE:
4337{
4338 AV *av = (AV *)SvRV (self);
4339 coro_signal_wake (aTHX_ av, AvFILLp (av));
4340}
4341
4342void
4343send (SV *self)
4344 CODE:
4345{
4346 AV *av = (AV *)SvRV (self);
4347
4348 if (AvFILLp (av))
4349 coro_signal_wake (aTHX_ av, 1);
4350 else
4351 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4352}
4353
4354IV
4355awaited (SV *self)
4356 CODE:
4357 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4358 OUTPUT:
4359 RETVAL
4360
4361
4362MODULE = Coro::State PACKAGE = Coro::AnyEvent
4363
4364BOOT:
4365 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4366
4367void
4368_schedule (...)
4369 CODE:
4370{
4371 static int incede;
4372
4373 api_cede_notself (aTHX);
4374
4375 ++incede;
4376 while (coro_nready >= incede && api_cede (aTHX))
4377 ;
4378
4379 sv_setsv (sv_activity, &PL_sv_undef);
4380 if (coro_nready >= incede)
4381 {
4382 PUSHMARK (SP);
4383 PUTBACK;
4384 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4385 }
4386
4387 --incede;
4388}
4389
4390
4391MODULE = Coro::State PACKAGE = Coro::AIO
4392
4393void
4394_register (char *target, char *proto, SV *req)
4395 CODE:
4396{
4397 SV *req_cv = s_get_cv_croak (req);
4398 /* newXSproto doesn't return the CV on 5.8 */
4399 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4400 sv_setpv ((SV *)slf_cv, proto);
4401 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4402}
4403
4404MODULE = Coro::State PACKAGE = Coro::Select
4405
4406void
4407patch_pp_sselect ()
4408 CODE:
4409 if (!coro_old_pp_sselect)
4410 {
4411 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4412 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4413 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4414 }
4415
4416void
4417unpatch_pp_sselect ()
4418 CODE:
4419 if (coro_old_pp_sselect)
4420 {
4421 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4422 coro_old_pp_sselect = 0;
4423 }
4424
4425MODULE = Coro::State PACKAGE = Coro::Util
4426
4427void
4428_exit (int code)
4429 CODE:
4430 _exit (code);
4431
4432NV
4433time ()
4434 CODE:
4435 RETVAL = nvtime (aTHX);
4436 OUTPUT:
4437 RETVAL
4438
4439NV
4440gettimeofday ()
4441 PPCODE:
4442{
4443 UV tv [2];
4444 u2time (aTHX_ tv);
4445 EXTEND (SP, 2);
4446 PUSHs (sv_2mortal (newSVuv (tv [0])));
4447 PUSHs (sv_2mortal (newSVuv (tv [1])));
4448}
4449

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