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Comparing Coro/Coro/State.xs (file contents):
Revision 1.140 by root, Sat Jan 20 19:52:15 2007 UTC vs.
Revision 1.446 by root, Wed Sep 3 14:26:34 2014 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1 /* perl usually disables NDEBUG later */
5
1#include "libcoro/coro.c" 6#include "libcoro/coro.c"
7
8#define PERL_NO_GET_CONTEXT
9#define PERL_EXT
2 10
3#include "EXTERN.h" 11#include "EXTERN.h"
4#include "perl.h" 12#include "perl.h"
5#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
6 15
7#include "patchlevel.h" 16#include "schmorp.h"
8 17
18#define ECB_NO_THREADS 1
19#define ECB_NO_LIBM 1
20#include "ecb.h"
21
22#include <stddef.h>
9#include <stdio.h> 23#include <stdio.h>
10#include <errno.h> 24#include <errno.h>
11#include <assert.h> 25#include <assert.h>
12 26
13#ifdef HAVE_MMAP 27#ifndef SVs_PADSTALE
14# include <unistd.h> 28# define SVs_PADSTALE 0
15# include <sys/mman.h>
16# ifndef MAP_ANONYMOUS
17# ifdef MAP_ANON
18# define MAP_ANONYMOUS MAP_ANON
19# else
20# undef HAVE_MMAP
21# endif 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;
22# endif 39# endif
23# include <limits.h> 40# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
24# ifndef PAGESIZE 41# define PadlistMAX(pl) AvFILLp (pl)
25# define PAGESIZE pagesize 42# define PadlistNAMES(pl) (*PadlistARRAY (pl))
26# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 43# define PadARRAY AvARRAY
27static long pagesize; 44# define PadMAX AvFILLp
45# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
46#endif
47
48/* 5.19.something has replaced SVt_BIND by SVt_INVLIST */
49/* we just alias it to SVt_IV, as that is sufficient for swap_sv for now */
50#if PERL_VERSION_ATLEAST(5,19,0)
51# define SVt_BIND SVt_IV
52#endif
53
54#if defined(_WIN32)
55# undef HAS_GETTIMEOFDAY
56# undef setjmp
57# undef longjmp
58# undef _exit
59# define setjmp _setjmp /* deep magic */
28# else 60#else
29# define BOOT_PAGESIZE (void)0 61# include <inttypes.h> /* most portable stdint.h */
62#endif
63
64/* the maximum number of idle cctx that will be pooled */
65static int cctx_max_idle = 4;
66
67#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
68# define HAS_SCOPESTACK_NAME 1
69#endif
70
71/* prefer perl internal functions over our own? */
72#ifndef CORO_PREFER_PERL_FUNCTIONS
73# define CORO_PREFER_PERL_FUNCTIONS 0
74#endif
75
76/* The next macros try to return the current stack pointer, in an as
77 * portable way as possible. */
78#if __GNUC__ >= 4
79# define dSTACKLEVEL int stacklevel_dummy
80# define STACKLEVEL __builtin_frame_address (0)
81#else
82# define dSTACKLEVEL volatile void *stacklevel
83# define STACKLEVEL ((void *)&stacklevel)
84#endif
85
86#define IN_DESTRUCT PL_dirty
87
88#include "CoroAPI.h"
89#define GCoroAPI (&coroapi) /* very sneaky */
90
91#ifdef USE_ITHREADS
92# if CORO_PTHREAD
93static void *coro_thx;
30# endif 94# endif
31#else
32# define PAGESIZE 0
33# define BOOT_PAGESIZE (void)0
34#endif 95#endif
35 96
36#if USE_VALGRIND 97#ifdef __linux
37# include <valgrind/valgrind.h> 98# include <time.h> /* for timespec */
38#endif 99# include <syscall.h> /* for SYS_* */
39 100# ifdef SYS_clock_gettime
40/* the maximum number of idle cctx that will be pooled */ 101# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
41#define MAX_IDLE_CCTX 8 102# define CORO_CLOCK_MONOTONIC 1
42 103# define CORO_CLOCK_THREAD_CPUTIME_ID 3
43#define PERL_VERSION_ATLEAST(a,b,c) \
44 (PERL_REVISION > (a) \
45 || (PERL_REVISION == (a) \
46 && (PERL_VERSION > (b) \
47 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
48
49#if !PERL_VERSION_ATLEAST (5,6,0)
50# ifndef PL_ppaddr
51# define PL_ppaddr ppaddr
52# endif 104# endif
53# ifndef call_sv
54# define call_sv perl_call_sv
55# endif 105#endif
56# ifndef get_sv
57# define get_sv perl_get_sv
58# endif
59# ifndef get_cv
60# define get_cv perl_get_cv
61# endif
62# ifndef IS_PADGV
63# define IS_PADGV(v) 0
64# endif
65# ifndef IS_PADCONST
66# define IS_PADCONST(v) 0
67# endif
68#endif
69 106
70/* 5.8.7 */ 107static double (*nvtime)(); /* so why doesn't it take void? */
71#ifndef SvRV_set 108static void (*u2time)(pTHX_ UV ret[2]);
72# define SvRV_set(s,v) SvRV(s) = (v)
73#endif
74 109
75#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 110/* we hijack an hopefully unused CV flag for our purposes */
76# undef STACKGUARD 111#define CVf_SLF 0x4000
77#endif 112static OP *pp_slf (pTHX);
113static void slf_destroy (pTHX_ struct coro *coro);
78 114
79#ifndef STACKGUARD 115static U32 cctx_gen;
80# define STACKGUARD 0 116static size_t cctx_stacksize = CORO_STACKSIZE;
81#endif
82
83/* prefer perl internal functions over our own? */
84#ifndef PREFER_PERL_FUNCTIONS
85# define PREFER_PERL_FUNCTIONS 0
86#endif
87
88/* The next macro should declare a variable stacklevel that contains and approximation
89 * to the current C stack pointer. Its property is that it changes with each call
90 * and should be unique. */
91#define dSTACKLEVEL int stacklevel
92#define STACKLEVEL ((void *)&stacklevel)
93
94#define IN_DESTRUCT (PL_main_cv == Nullcv)
95
96#if __GNUC__ >= 3
97# define attribute(x) __attribute__(x)
98# define BARRIER __asm__ __volatile__ ("" : : : "memory")
99#else
100# define attribute(x)
101# define BARRIER
102#endif
103
104#define NOINLINE attribute ((noinline))
105
106#include "CoroAPI.h"
107
108#ifdef USE_ITHREADS
109static perl_mutex coro_mutex;
110# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
111# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
112#else
113# define LOCK (void)0
114# define UNLOCK (void)0
115#endif
116
117/* helper storage struct for Coro::AIO */
118struct io_state
119{
120 int errorno;
121 I32 laststype;
122 int laststatval;
123 Stat_t statcache;
124};
125
126static struct CoroAPI coroapi; 117static struct CoroAPI coroapi;
127static AV *main_mainstack; /* used to differentiate between $main and others */ 118static AV *main_mainstack; /* used to differentiate between $main and others */
119static JMPENV *main_top_env;
128static HV *coro_state_stash, *coro_stash; 120static HV *coro_state_stash, *coro_stash;
129static SV *coro_mortal; /* will be freed after next transfer */ 121static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
122
123static AV *av_destroy; /* destruction queue */
124static SV *sv_manager; /* the manager coro */
125static SV *sv_idle; /* $Coro::idle */
126
127static GV *irsgv; /* $/ */
128static GV *stdoutgv; /* *STDOUT */
129static SV *rv_diehook;
130static SV *rv_warnhook;
131static HV *hv_sig; /* %SIG */
132
133/* async_pool helper stuff */
134static SV *sv_pool_rss;
135static SV *sv_pool_size;
136static SV *sv_async_pool_idle; /* description string */
137static AV *av_async_pool; /* idle pool */
138static SV *sv_Coro; /* class string */
139static CV *cv_pool_handler;
140
141/* Coro::AnyEvent */
142static SV *sv_activity;
143
144/* enable processtime/realtime profiling */
145static char enable_times;
146typedef U32 coro_ts[2];
147static coro_ts time_real, time_cpu;
148static char times_valid;
130 149
131static struct coro_cctx *cctx_first; 150static struct coro_cctx *cctx_first;
132static int cctx_count, cctx_idle; 151static int cctx_count, cctx_idle;
133 152
153enum
154{
155 CC_MAPPED = 0x01,
156 CC_NOREUSE = 0x02, /* throw this away after tracing */
157 CC_TRACE = 0x04,
158 CC_TRACE_SUB = 0x08, /* trace sub calls */
159 CC_TRACE_LINE = 0x10, /* trace each statement */
160 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
161};
162
134/* this is a structure representing a c-level coroutine */ 163/* this is a structure representing a c-level coroutine */
135typedef struct coro_cctx { 164typedef struct coro_cctx
165{
136 struct coro_cctx *next; 166 struct coro_cctx *next;
137 167
138 /* the stack */ 168 /* the stack */
139 void *sptr; 169 struct coro_stack stack;
140 long ssize; /* positive == mmap, otherwise malloc */
141 170
142 /* cpu state */ 171 /* cpu state */
143 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 172 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
173#ifndef NDEBUG
144 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 174 JMPENV *idle_te; /* same as idle_sp, but for top_env */
175#endif
145 JMPENV *top_env; 176 JMPENV *top_env;
146 coro_context cctx; 177 coro_context cctx;
147 178
148 int inuse; 179 U32 gen;
149
150#if USE_VALGRIND 180#if CORO_USE_VALGRIND
151 int valgrind_id; 181 int valgrind_id;
152#endif 182#endif
183 unsigned char flags;
153} coro_cctx; 184} coro_cctx;
154 185
186static coro_cctx *cctx_current; /* the currently running cctx */
187
188/*****************************************************************************/
189
190static MGVTBL coro_state_vtbl;
191
155enum { 192enum
193{
156 CF_RUNNING = 0x0001, /* coroutine is running */ 194 CF_RUNNING = 0x0001, /* coroutine is running */
157 CF_READY = 0x0002, /* coroutine is ready */ 195 CF_READY = 0x0002, /* coroutine is ready */
158 CF_NEW = 0x0004, /* has never been switched to */ 196 CF_NEW = 0x0004, /* has never been switched to */
159 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 197 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
198 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
199 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
160}; 200};
161 201
202/* the structure where most of the perl state is stored, overlaid on the cxstack */
203typedef struct
204{
205 #define VARx(name,expr,type) type name;
206 #include "state.h"
207} perl_slots;
208
209/* how many context stack entries do we need for perl_slots */
210#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
211
162/* this is a structure representing a perl-level coroutine */ 212/* this is a structure representing a perl-level coroutine */
163struct coro { 213struct coro
214{
164 /* the c coroutine allocated to this perl coroutine, if any */ 215 /* the C coroutine allocated to this perl coroutine, if any */
165 coro_cctx *cctx; 216 coro_cctx *cctx;
166 217
218 /* ready queue */
219 struct coro *next_ready;
220
221 /* state data */
222 struct CoroSLF slf_frame; /* saved slf frame */
223 AV *mainstack;
224 perl_slots *slot; /* basically the saved sp */
225
226 CV *startcv; /* the CV to execute */
167 /* data associated with this coroutine (initial args) */ 227 AV *args; /* data associated with this coroutine (initial args) */
168 AV *args;
169 int refcnt;
170 int save; /* CORO_SAVE flags */
171 int flags; /* CF_ flags */ 228 int flags; /* CF_ flags */
229 HV *hv; /* the perl hash associated with this coro, if any */
172 230
173 /* optionally saved, might be zero */ 231 /* statistics */
174 AV *defav; /* @_ */ 232 int usecount; /* number of transfers to this coro */
175 SV *defsv; /* $_ */
176 SV *errsv; /* $@ */
177 SV *irssv; /* $/ */
178 SV *irssv_sv; /* real $/ cache */
179
180#define VAR(name,type) type name;
181# include "state.h"
182#undef VAR
183 233
184 /* coro process data */ 234 /* coro process data */
185 int prio; 235 int prio;
236 SV *except; /* exception to be thrown */
237 SV *rouse_cb; /* last rouse callback */
238 AV *on_destroy; /* callbacks or coros to notify on destroy */
239 AV *status; /* the exit status list */
240
241 /* async_pool */
242 SV *saved_deffh;
243 SV *invoke_cb;
244 AV *invoke_av;
245
246 /* on_enter/on_leave */
247 AV *on_enter;
248 AV *on_leave;
249
250 /* swap_sv */
251 AV *swap_sv;
252
253 /* times */
254 coro_ts t_cpu, t_real;
255
256 /* linked list */
257 struct coro *next, *prev;
186}; 258};
187 259
188typedef struct coro *Coro__State; 260typedef struct coro *Coro__State;
189typedef struct coro *Coro__State_or_hashref; 261typedef struct coro *Coro__State_or_hashref;
190 262
263/* the following variables are effectively part of the perl context */
264/* and get copied between struct coro and these variables */
265/* the main reason we don't support windows process emulation */
266static struct CoroSLF slf_frame; /* the current slf frame */
267
191/** Coro ********************************************************************/ 268/** Coro ********************************************************************/
192 269
193#define PRIO_MAX 3 270#define CORO_PRIO_MAX 3
194#define PRIO_HIGH 1 271#define CORO_PRIO_HIGH 1
195#define PRIO_NORMAL 0 272#define CORO_PRIO_NORMAL 0
196#define PRIO_LOW -1 273#define CORO_PRIO_LOW -1
197#define PRIO_IDLE -3 274#define CORO_PRIO_IDLE -3
198#define PRIO_MIN -4 275#define CORO_PRIO_MIN -4
199 276
200/* for Coro.pm */ 277/* for Coro.pm */
201static SV *coro_current; 278static SV *coro_current;
202static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 279static SV *coro_readyhook;
203static int coro_nready; 280static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
281static CV *cv_coro_run;
282static struct coro *coro_first;
283#define coro_nready coroapi.nready
284
285/** JIT *********************************************************************/
286
287#if CORO_JIT
288 /* APPLE doesn't have mmap though */
289 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
290 #ifndef CORO_JIT_TYPE
291 #if ECB_AMD64 && CORO_JIT_UNIXY
292 #define CORO_JIT_TYPE "amd64-unix"
293 #elif __i386 && CORO_JIT_UNIXY
294 #define CORO_JIT_TYPE "x86-unix"
295 #endif
296 #endif
297#endif
298
299#if !defined(CORO_JIT_TYPE) || _POSIX_MEMORY_PROTECTION <= 0
300 #undef CORO_JIT
301#endif
302
303#if CORO_JIT
304 typedef void (*load_save_perl_slots_type)(perl_slots *);
305 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
306#endif
307
308/** Coro::Select ************************************************************/
309
310static OP *(*coro_old_pp_sselect) (pTHX);
311static SV *coro_select_select;
312
313/* horrible hack, but if it works... */
314static OP *
315coro_pp_sselect (pTHX)
316{
317 dSP;
318 PUSHMARK (SP - 4); /* fake argument list */
319 XPUSHs (coro_select_select);
320 PUTBACK;
321
322 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
323 PL_op->op_flags |= OPf_STACKED;
324 PL_op->op_private = 0;
325 return PL_ppaddr [OP_ENTERSUB](aTHX);
326}
327
328/** time stuff **************************************************************/
329
330#ifdef HAS_GETTIMEOFDAY
331
332ecb_inline void
333coro_u2time (pTHX_ UV ret[2])
334{
335 struct timeval tv;
336 gettimeofday (&tv, 0);
337
338 ret [0] = tv.tv_sec;
339 ret [1] = tv.tv_usec;
340}
341
342ecb_inline double
343coro_nvtime (void)
344{
345 struct timeval tv;
346 gettimeofday (&tv, 0);
347
348 return tv.tv_sec + tv.tv_usec * 1e-6;
349}
350
351ecb_inline void
352time_init (pTHX)
353{
354 nvtime = coro_nvtime;
355 u2time = coro_u2time;
356}
357
358#else
359
360ecb_inline void
361time_init (pTHX)
362{
363 SV **svp;
364
365 require_pv ("Time/HiRes.pm");
366
367 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
368
369 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
370 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
371
372 nvtime = INT2PTR (double (*)(), SvIV (*svp));
373
374 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
375 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
376}
377
378#endif
204 379
205/** lowlevel stuff **********************************************************/ 380/** lowlevel stuff **********************************************************/
206 381
207static AV * 382static SV * ecb_noinline
383coro_get_sv (pTHX_ const char *name, int create)
384{
385#if PERL_VERSION_ATLEAST (5,10,0)
386 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
387 get_sv (name, create);
388#endif
389 return get_sv (name, create);
390}
391
392static AV * ecb_noinline
393coro_get_av (pTHX_ const char *name, int create)
394{
395#if PERL_VERSION_ATLEAST (5,10,0)
396 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
397 get_av (name, create);
398#endif
399 return get_av (name, create);
400}
401
402static HV * ecb_noinline
403coro_get_hv (pTHX_ const char *name, int create)
404{
405#if PERL_VERSION_ATLEAST (5,10,0)
406 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
407 get_hv (name, create);
408#endif
409 return get_hv (name, create);
410}
411
412ecb_inline void
413coro_times_update (void)
414{
415#ifdef coro_clock_gettime
416 struct timespec ts;
417
418 ts.tv_sec = ts.tv_nsec = 0;
419 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
420 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
421
422 ts.tv_sec = ts.tv_nsec = 0;
423 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
424 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
425#else
426 dTHX;
427 UV tv[2];
428
429 u2time (aTHX_ tv);
430 time_real [0] = tv [0];
431 time_real [1] = tv [1] * 1000;
432#endif
433}
434
435ecb_inline void
436coro_times_add (struct coro *c)
437{
438 c->t_real [1] += time_real [1];
439 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
440 c->t_real [0] += time_real [0];
441
442 c->t_cpu [1] += time_cpu [1];
443 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
444 c->t_cpu [0] += time_cpu [0];
445}
446
447ecb_inline void
448coro_times_sub (struct coro *c)
449{
450 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
451 c->t_real [1] -= time_real [1];
452 c->t_real [0] -= time_real [0];
453
454 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
455 c->t_cpu [1] -= time_cpu [1];
456 c->t_cpu [0] -= time_cpu [0];
457}
458
459/*****************************************************************************/
460/* magic glue */
461
462#define CORO_MAGIC_type_cv 26
463#define CORO_MAGIC_type_state PERL_MAGIC_ext
464
465#define CORO_MAGIC_NN(sv, type) \
466 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
467 ? SvMAGIC (sv) \
468 : mg_find (sv, type))
469
470#define CORO_MAGIC(sv, type) \
471 (ecb_expect_true (SvMAGIC (sv)) \
472 ? CORO_MAGIC_NN (sv, type) \
473 : 0)
474
475#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
476#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
477
478ecb_inline MAGIC *
479SvSTATEhv_p (pTHX_ SV *coro)
480{
481 MAGIC *mg;
482
483 if (ecb_expect_true (
484 SvTYPE (coro) == SVt_PVHV
485 && (mg = CORO_MAGIC_state (coro))
486 && mg->mg_virtual == &coro_state_vtbl
487 ))
488 return mg;
489
490 return 0;
491}
492
493ecb_inline struct coro *
494SvSTATE_ (pTHX_ SV *coro)
495{
496 MAGIC *mg;
497
498 if (SvROK (coro))
499 coro = SvRV (coro);
500
501 mg = SvSTATEhv_p (aTHX_ coro);
502 if (!mg)
503 croak ("Coro::State object required");
504
505 return (struct coro *)mg->mg_ptr;
506}
507
508#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
509
510/* faster than SvSTATE, but expects a coroutine hv */
511#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
512#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
513
514/*****************************************************************************/
515/* padlist management and caching */
516
517ecb_inline PADLIST *
208coro_clone_padlist (CV *cv) 518coro_derive_padlist (pTHX_ CV *cv)
209{ 519{
210 AV *padlist = CvPADLIST (cv); 520 PADLIST *padlist = CvPADLIST (cv);
211 AV *newpadlist, *newpad; 521 PADLIST *newpadlist;
522 PAD *newpad;
523 PADOFFSET off = PadlistMAX (padlist) + 1;
212 524
213 newpadlist = newAV (); 525#if NEWPADAPI
526
527 /* if we had the original CvDEPTH, we might be able to steal the CvDEPTH+1 entry instead */
528 /* 20131102194744.GA6705@schmorp.de, 20131102195825.2013.qmail@lists-nntp.develooper.com */
529 while (!PadlistARRAY (padlist)[off - 1])
530 --off;
531
532 Perl_pad_push (aTHX_ padlist, off);
533
534 newpad = PadlistARRAY (padlist)[off];
535 PadlistARRAY (padlist)[off] = 0;
536
537#else
538
539#if PERL_VERSION_ATLEAST (5,10,0)
540 Perl_pad_push (aTHX_ padlist, off);
541#else
542 Perl_pad_push (aTHX_ padlist, off, 1);
543#endif
544
545 newpad = PadlistARRAY (padlist)[off];
546 PadlistMAX (padlist) = off - 1;
547
548#endif
549
550 newPADLIST (newpadlist);
551#if !PERL_VERSION_ATLEAST(5,15,3)
552 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
214 AvREAL_off (newpadlist); 553 AvREAL_off (newpadlist);
215#if PERL_VERSION_ATLEAST (5,9,0)
216 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
217#else
218 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
219#endif 554#endif
220 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
221 --AvFILLp (padlist);
222 555
223 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 556 /* Already extended to 2 elements by newPADLIST. */
224 av_store (newpadlist, 1, (SV *)newpad); 557 PadlistMAX (newpadlist) = 1;
558 PadlistNAMES (newpadlist) = (PADNAMELIST *)SvREFCNT_inc_NN (PadlistNAMES (padlist));
559 PadlistARRAY (newpadlist)[1] = newpad;
225 560
226 return newpadlist; 561 return newpadlist;
227} 562}
228 563
229static void 564ecb_inline void
230free_padlist (AV *padlist) 565free_padlist (pTHX_ PADLIST *padlist)
231{ 566{
232 /* may be during global destruction */ 567 /* may be during global destruction */
233 if (SvREFCNT (padlist)) 568 if (!IN_DESTRUCT)
234 { 569 {
235 I32 i = AvFILLp (padlist); 570 I32 i = PadlistMAX (padlist);
236 while (i >= 0) 571
572 while (i > 0) /* special-case index 0 */
237 { 573 {
238 SV **svp = av_fetch (padlist, i--, FALSE); 574 /* we try to be extra-careful here */
575 PAD *pad = PadlistARRAY (padlist)[i--];
576
239 if (svp) 577 if (pad)
240 { 578 {
241 SV *sv; 579 I32 j = PadMAX (pad);
242 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 580
581 while (j >= 0)
243 SvREFCNT_dec (sv); 582 SvREFCNT_dec (PadARRAY (pad)[j--]);
244 583
584 PadMAX (pad) = -1;
245 SvREFCNT_dec (*svp); 585 SvREFCNT_dec (pad);
246 } 586 }
247 } 587 }
248 588
589 SvREFCNT_dec (PadlistNAMES (padlist));
590
591#if NEWPADAPI
592 Safefree (PadlistARRAY (padlist));
593 Safefree (padlist);
594#else
595 AvFILLp (padlist) = -1;
596 AvREAL_off (padlist);
249 SvREFCNT_dec ((SV*)padlist); 597 SvREFCNT_dec ((SV*)padlist);
598#endif
250 } 599 }
251} 600}
252 601
253static int 602static int
254coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 603coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
255{ 604{
256 AV *padlist; 605 PADLIST *padlist;
257 AV *av = (AV *)mg->mg_obj; 606 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
607 size_t len = *(size_t *)mg->mg_ptr;
258 608
259 /* casting is fun. */ 609 /* perl manages to free our internal AV and _then_ call us */
260 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 610 if (IN_DESTRUCT)
611 return 0;
612
613 while (len--)
261 free_padlist (padlist); 614 free_padlist (aTHX_ padlists[len]);
262
263 SvREFCNT_dec (av);
264 615
265 return 0; 616 return 0;
266} 617}
267 618
268#define PERL_MAGIC_coro PERL_MAGIC_ext 619static MGVTBL coro_cv_vtbl = {
269 620 0, 0, 0, 0,
270static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 621 coro_cv_free
271 622};
272#define CORO_MAGIC(cv) \
273 SvMAGIC (cv) \
274 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
275 ? SvMAGIC (cv) \
276 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
277 : 0
278 623
279/* the next two functions merely cache the padlists */ 624/* the next two functions merely cache the padlists */
280static void 625ecb_inline void
281get_padlist (CV *cv) 626get_padlist (pTHX_ CV *cv)
282{ 627{
283 MAGIC *mg = CORO_MAGIC (cv); 628 MAGIC *mg = CORO_MAGIC_cv (cv);
284 AV *av; 629 size_t *lenp;
285 630
286 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 631 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
287 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 632 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
288 else 633 else
289 { 634 {
290#if PREFER_PERL_FUNCTIONS 635#if CORO_PREFER_PERL_FUNCTIONS
291 /* this is probably cleaner, but also slower? */ 636 /* this is probably cleaner? but also slower! */
637 /* in practise, it seems to be less stable */
292 CV *cp = Perl_cv_clone (cv); 638 CV *cp = Perl_cv_clone (aTHX_ cv);
293 CvPADLIST (cv) = CvPADLIST (cp); 639 CvPADLIST (cv) = CvPADLIST (cp);
294 CvPADLIST (cp) = 0; 640 CvPADLIST (cp) = 0;
295 SvREFCNT_dec (cp); 641 SvREFCNT_dec (cp);
296#else 642#else
297 CvPADLIST (cv) = coro_clone_padlist (cv); 643 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
298#endif 644#endif
299 } 645 }
300} 646}
301 647
302static void 648ecb_inline void
303put_padlist (CV *cv) 649put_padlist (pTHX_ CV *cv)
304{ 650{
305 MAGIC *mg = CORO_MAGIC (cv); 651 MAGIC *mg = CORO_MAGIC_cv (cv);
306 AV *av;
307 652
308 if (!mg) 653 if (ecb_expect_false (!mg))
309 {
310 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
311 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
312 mg->mg_virtual = &vtbl_coro;
313 mg->mg_obj = (SV *)newAV ();
314 } 654 {
655 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
656 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
657 mg->mg_len = 1; /* so mg_free frees mg_ptr */
658 }
659 else
660 Renew (mg->mg_ptr,
661 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
662 char);
315 663
316 av = (AV *)mg->mg_obj; 664 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
317
318 if (AvFILLp (av) >= AvMAX (av))
319 av_extend (av, AvMAX (av) + 1);
320
321 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
322} 665}
323 666
324/** load & save, init *******************************************************/ 667/** load & save, init *******************************************************/
325 668
326#define SB do { 669ecb_inline void
327#define SE } while (0) 670swap_sv (SV *a, SV *b)
671{
672 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
673 SV tmp;
328 674
329#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE 675 /* swap sv_any */
676 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
330 677
678 /* swap sv_flags */
679 SvFLAGS (&tmp) = SvFLAGS (a);
680 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
681 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
682
683#if PERL_VERSION_ATLEAST (5,10,0)
684 /* perl 5.10 and later complicates this _quite_ a bit, but it also
685 * is much faster, so no quarrels here. alternatively, we could
686 * sv_upgrade to avoid this.
687 */
688 {
689 /* swap sv_u */
690 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
691
692 /* if SvANY points to the head, we need to adjust the pointers,
693 * as the pointer for a still points to b, and maybe vice versa.
694 */
695 #define svany_in_head(type) \
696 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
697
698 if (svany_in_head (SvTYPE (a)))
699 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
700
701 if (svany_in_head (SvTYPE (b)))
702 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
703 }
704#endif
705}
706
707/* swap sv heads, at least logically */
331static void 708static void
709swap_svs (pTHX_ Coro__State c)
710{
711 int i;
712
713 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
714 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
715}
716
717#define SWAP_SVS(coro) \
718 if (ecb_expect_false ((coro)->swap_sv)) \
719 swap_svs (aTHX_ (coro))
720
721static void
722on_enterleave_call (pTHX_ SV *cb);
723
724static void
332load_perl (Coro__State c) 725load_perl (pTHX_ Coro__State c)
333{ 726{
334#define VAR(name,type) PL_ ## name = c->name; 727 perl_slots *slot = c->slot;
728 c->slot = 0;
729
730 PL_mainstack = c->mainstack;
731
732#if CORO_JIT
733 load_perl_slots (slot);
734#else
735 #define VARx(name,expr,type) expr = slot->name;
335# include "state.h" 736 #include "state.h"
336#undef VAR 737#endif
337
338 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
339 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
340 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
341 if (c->irssv)
342 {
343 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
344 SvREFCNT_dec (c->irssv);
345 else
346 {
347 REPLACE_SV (PL_rs, c->irssv);
348 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
349 sv_setsv (c->irssv_sv, PL_rs);
350 }
351 }
352 738
353 { 739 {
354 dSP; 740 dSP;
741
355 CV *cv; 742 CV *cv;
356 743
357 /* now do the ugly restore mess */ 744 /* now do the ugly restore mess */
358 while ((cv = (CV *)POPs)) 745 while (ecb_expect_true (cv = (CV *)POPs))
359 { 746 {
360 put_padlist (cv); /* mark this padlist as available */ 747 put_padlist (aTHX_ cv); /* mark this padlist as available */
361 CvDEPTH (cv) = PTR2IV (POPs); 748 CvDEPTH (cv) = PTR2IV (POPs);
362 CvPADLIST (cv) = (AV *)POPs; 749 CvPADLIST (cv) = (PADLIST *)POPs;
363 } 750 }
364 751
365 PUTBACK; 752 PUTBACK;
366 } 753 }
367}
368 754
755 slf_frame = c->slf_frame;
756 CORO_THROW = c->except;
757
758 if (ecb_expect_false (enable_times))
759 {
760 if (ecb_expect_false (!times_valid))
761 coro_times_update ();
762
763 coro_times_sub (c);
764 }
765
766 if (ecb_expect_false (c->on_enter))
767 {
768 int i;
769
770 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
771 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
772 }
773
774 SWAP_SVS (c);
775}
776
369static void 777static void
370save_perl (Coro__State c) 778save_perl (pTHX_ Coro__State c)
371{ 779{
780 SWAP_SVS (c);
781
782 if (ecb_expect_false (c->on_leave))
783 {
784 int i;
785
786 for (i = AvFILLp (c->on_leave); i >= 0; --i)
787 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
788 }
789
790 times_valid = 0;
791
792 if (ecb_expect_false (enable_times))
793 {
794 coro_times_update (); times_valid = 1;
795 coro_times_add (c);
796 }
797
798 c->except = CORO_THROW;
799 c->slf_frame = slf_frame;
800
372 { 801 {
373 dSP; 802 dSP;
374 I32 cxix = cxstack_ix; 803 I32 cxix = cxstack_ix;
375 PERL_CONTEXT *ccstk = cxstack; 804 PERL_CONTEXT *ccstk = cxstack;
376 PERL_SI *top_si = PL_curstackinfo; 805 PERL_SI *top_si = PL_curstackinfo;
… …
378 /* 807 /*
379 * the worst thing you can imagine happens first - we have to save 808 * the worst thing you can imagine happens first - we have to save
380 * (and reinitialize) all cv's in the whole callchain :( 809 * (and reinitialize) all cv's in the whole callchain :(
381 */ 810 */
382 811
383 EXTEND (SP, 3 + 1);
384 PUSHs (Nullsv); 812 XPUSHs (Nullsv);
385 /* this loop was inspired by pp_caller */ 813 /* this loop was inspired by pp_caller */
386 for (;;) 814 for (;;)
387 { 815 {
388 while (cxix >= 0) 816 while (ecb_expect_true (cxix >= 0))
389 { 817 {
390 PERL_CONTEXT *cx = &ccstk[cxix--]; 818 PERL_CONTEXT *cx = &ccstk[cxix--];
391 819
392 if (CxTYPE (cx) == CXt_SUB) 820 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
393 { 821 {
394 CV *cv = cx->blk_sub.cv; 822 CV *cv = cx->blk_sub.cv;
395 823
396 if (CvDEPTH (cv)) 824 if (ecb_expect_true (CvDEPTH (cv)))
397 { 825 {
398 EXTEND (SP, 3); 826 EXTEND (SP, 3);
399 PUSHs ((SV *)CvPADLIST (cv)); 827 PUSHs ((SV *)CvPADLIST (cv));
400 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 828 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
401 PUSHs ((SV *)cv); 829 PUSHs ((SV *)cv);
402 830
403 CvDEPTH (cv) = 0; 831 CvDEPTH (cv) = 0;
404 get_padlist (cv); 832 get_padlist (aTHX_ cv);
405 } 833 }
406 } 834 }
407 } 835 }
408 836
409 if (top_si->si_type == PERLSI_MAIN) 837 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
410 break; 838 break;
411 839
412 top_si = top_si->si_prev; 840 top_si = top_si->si_prev;
413 ccstk = top_si->si_cxstack; 841 ccstk = top_si->si_cxstack;
414 cxix = top_si->si_cxix; 842 cxix = top_si->si_cxix;
415 } 843 }
416 844
417 PUTBACK; 845 PUTBACK;
418 } 846 }
419 847
420 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 848 /* allocate some space on the context stack for our purposes */
421 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 849 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
422 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 850 {
423 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; 851 unsigned int i;
424 852
425#define VAR(name,type)c->name = PL_ ## name; 853 for (i = 0; i < SLOT_COUNT; ++i)
854 CXINC;
855
856 cxstack_ix -= SLOT_COUNT; /* undo allocation */
857 }
858
859 c->mainstack = PL_mainstack;
860
861 {
862 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
863
864#if CORO_JIT
865 save_perl_slots (slot);
866#else
867 #define VARx(name,expr,type) slot->name = expr;
426# include "state.h" 868 #include "state.h"
427#undef VAR 869#endif
870 }
428} 871}
429 872
430/* 873/*
431 * allocate various perl stacks. This is an exact copy 874 * allocate various perl stacks. This is almost an exact copy
432 * of perl.c:init_stacks, except that it uses less memory 875 * of perl.c:init_stacks, except that it uses less memory
433 * on the (sometimes correct) assumption that coroutines do 876 * on the (sometimes correct) assumption that coroutines do
434 * not usually need a lot of stackspace. 877 * not usually need a lot of stackspace.
435 */ 878 */
436#if PREFER_PERL_FUNCTIONS 879#if CORO_PREFER_PERL_FUNCTIONS
437# define coro_init_stacks init_stacks 880# define coro_init_stacks(thx) init_stacks ()
438#else 881#else
439static void 882static void
440coro_init_stacks () 883coro_init_stacks (pTHX)
441{ 884{
442 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 885 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
443 PL_curstackinfo->si_type = PERLSI_MAIN; 886 PL_curstackinfo->si_type = PERLSI_MAIN;
444 PL_curstack = PL_curstackinfo->si_stack; 887 PL_curstack = PL_curstackinfo->si_stack;
445 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 888 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
446 889
447 PL_stack_base = AvARRAY(PL_curstack); 890 PL_stack_base = AvARRAY(PL_curstack);
448 PL_stack_sp = PL_stack_base; 891 PL_stack_sp = PL_stack_base;
449 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 892 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
450 893
451 New(50,PL_tmps_stack,128,SV*); 894 New(50,PL_tmps_stack,32,SV*);
452 PL_tmps_floor = -1; 895 PL_tmps_floor = -1;
453 PL_tmps_ix = -1; 896 PL_tmps_ix = -1;
454 PL_tmps_max = 128; 897 PL_tmps_max = 32;
455 898
456 New(54,PL_markstack,32,I32); 899 New(54,PL_markstack,16,I32);
457 PL_markstack_ptr = PL_markstack; 900 PL_markstack_ptr = PL_markstack;
458 PL_markstack_max = PL_markstack + 32; 901 PL_markstack_max = PL_markstack + 16;
459 902
460#ifdef SET_MARK_OFFSET 903#ifdef SET_MARK_OFFSET
461 SET_MARK_OFFSET; 904 SET_MARK_OFFSET;
462#endif 905#endif
463 906
464 New(54,PL_scopestack,32,I32); 907 New(54,PL_scopestack,8,I32);
465 PL_scopestack_ix = 0; 908 PL_scopestack_ix = 0;
466 PL_scopestack_max = 32; 909 PL_scopestack_max = 8;
910#if HAS_SCOPESTACK_NAME
911 New(54,PL_scopestack_name,8,const char*);
912#endif
467 913
468 New(54,PL_savestack,64,ANY); 914 New(54,PL_savestack,24,ANY);
469 PL_savestack_ix = 0; 915 PL_savestack_ix = 0;
470 PL_savestack_max = 64; 916 PL_savestack_max = 24;
471 917
472#if !PERL_VERSION_ATLEAST (5,9,0) 918#if !PERL_VERSION_ATLEAST (5,10,0)
473 New(54,PL_retstack,16,OP*); 919 New(54,PL_retstack,4,OP*);
474 PL_retstack_ix = 0; 920 PL_retstack_ix = 0;
475 PL_retstack_max = 16; 921 PL_retstack_max = 4;
476#endif 922#endif
477} 923}
478#endif 924#endif
479 925
480/* 926/*
481 * destroy the stacks, the callchain etc... 927 * destroy the stacks, the callchain etc...
482 */ 928 */
483static void 929static void
484coro_destroy_stacks () 930coro_destruct_stacks (pTHX)
485{ 931{
486 if (!IN_DESTRUCT)
487 {
488 /* restore all saved variables and stuff */
489 LEAVE_SCOPE (0);
490 assert (PL_tmps_floor == -1);
491
492 /* free all temporaries */
493 FREETMPS;
494 assert (PL_tmps_ix == -1);
495
496 /* unwind all extra stacks */
497 POPSTACK_TO (PL_mainstack);
498
499 /* unwind main stack */
500 dounwind (-1);
501 }
502
503 while (PL_curstackinfo->si_next) 932 while (PL_curstackinfo->si_next)
504 PL_curstackinfo = PL_curstackinfo->si_next; 933 PL_curstackinfo = PL_curstackinfo->si_next;
505 934
506 while (PL_curstackinfo) 935 while (PL_curstackinfo)
507 { 936 {
… …
516 } 945 }
517 946
518 Safefree (PL_tmps_stack); 947 Safefree (PL_tmps_stack);
519 Safefree (PL_markstack); 948 Safefree (PL_markstack);
520 Safefree (PL_scopestack); 949 Safefree (PL_scopestack);
950#if HAS_SCOPESTACK_NAME
951 Safefree (PL_scopestack_name);
952#endif
521 Safefree (PL_savestack); 953 Safefree (PL_savestack);
522#if !PERL_VERSION_ATLEAST (5,9,0) 954#if !PERL_VERSION_ATLEAST (5,10,0)
523 Safefree (PL_retstack); 955 Safefree (PL_retstack);
524#endif 956#endif
525} 957}
526 958
959#define CORO_RSS \
960 rss += sizeof (SYM (curstackinfo)); \
961 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
962 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
963 rss += SYM (tmps_max) * sizeof (SV *); \
964 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
965 rss += SYM (scopestack_max) * sizeof (I32); \
966 rss += SYM (savestack_max) * sizeof (ANY);
967
968static size_t
969coro_rss (pTHX_ struct coro *coro)
970{
971 size_t rss = sizeof (*coro);
972
973 if (coro->mainstack)
974 {
975 if (coro->flags & CF_RUNNING)
976 {
977 #define SYM(sym) PL_ ## sym
978 CORO_RSS;
979 #undef SYM
980 }
981 else
982 {
983 #define SYM(sym) coro->slot->sym
984 CORO_RSS;
985 #undef SYM
986 }
987 }
988
989 return rss;
990}
991
527/** coroutine stack handling ************************************************/ 992/** coroutine stack handling ************************************************/
528 993
994static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
995static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
996static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
997
998/* apparently < 5.8.8 */
999#ifndef MgPV_nolen_const
1000#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
1001 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
1002 (const char*)(mg)->mg_ptr)
1003#endif
1004
1005/*
1006 * This overrides the default magic get method of %SIG elements.
1007 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
1008 * and instead of trying to save and restore the hash elements (extremely slow),
1009 * we just provide our own readback here.
1010 */
1011static int ecb_cold
1012coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
1013{
1014 const char *s = MgPV_nolen_const (mg);
1015
1016 if (*s == '_')
1017 {
1018 SV **svp = 0;
1019
1020 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1021 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1022
1023 if (svp)
1024 {
1025 SV *ssv;
1026
1027 if (!*svp)
1028 ssv = &PL_sv_undef;
1029 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1030 ssv = sv_2mortal (newRV_inc (*svp));
1031 else
1032 ssv = *svp;
1033
1034 sv_setsv (sv, ssv);
1035 return 0;
1036 }
1037 }
1038
1039 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1040}
1041
1042static int ecb_cold
1043coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1044{
1045 const char *s = MgPV_nolen_const (mg);
1046
1047 if (*s == '_')
1048 {
1049 SV **svp = 0;
1050
1051 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1052 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1053
1054 if (svp)
1055 {
1056 SV *old = *svp;
1057 *svp = 0;
1058 SvREFCNT_dec (old);
1059 return 0;
1060 }
1061 }
1062
1063 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1064}
1065
1066static int ecb_cold
1067coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1068{
1069 const char *s = MgPV_nolen_const (mg);
1070
1071 if (*s == '_')
1072 {
1073 SV **svp = 0;
1074
1075 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1076 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1077
1078 if (svp)
1079 {
1080 SV *old = *svp;
1081 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1082 SvREFCNT_dec (old);
1083 return 0;
1084 }
1085 }
1086
1087 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1088}
1089
1090static void
1091prepare_nop (pTHX_ struct coro_transfer_args *ta)
1092{
1093 /* kind of mega-hacky, but works */
1094 ta->next = ta->prev = (struct coro *)ta;
1095}
1096
529static void 1097static int
530setup_coro (struct coro *coro) 1098slf_check_nop (pTHX_ struct CoroSLF *frame)
1099{
1100 return 0;
1101}
1102
1103static int
1104slf_check_repeat (pTHX_ struct CoroSLF *frame)
1105{
1106 return 1;
1107}
1108
1109static UNOP init_perl_op;
1110
1111ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1112init_perl (pTHX_ struct coro *coro)
531{ 1113{
532 /* 1114 /*
533 * emulate part of the perl startup here. 1115 * emulate part of the perl startup here.
534 */ 1116 */
535
536 coro_init_stacks (); 1117 coro_init_stacks (aTHX);
537 1118
1119 PL_runops = RUNOPS_DEFAULT;
538 PL_curcop = &PL_compiling; 1120 PL_curcop = &PL_compiling;
539 PL_in_eval = EVAL_NULL; 1121 PL_in_eval = EVAL_NULL;
1122 PL_comppad = 0;
1123 PL_comppad_name = 0;
1124 PL_comppad_name_fill = 0;
1125 PL_comppad_name_floor = 0;
540 PL_curpm = 0; 1126 PL_curpm = 0;
1127 PL_curpad = 0;
541 PL_localizing = 0; 1128 PL_localizing = 0;
542 PL_dirty = 0;
543 PL_restartop = 0; 1129 PL_restartop = 0;
1130#if PERL_VERSION_ATLEAST (5,10,0)
1131 PL_parser = 0;
1132#endif
1133 PL_hints = 0;
1134
1135 /* recreate the die/warn hooks */
1136 PL_diehook = SvREFCNT_inc (rv_diehook);
1137 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1138
1139 GvSV (PL_defgv) = newSV (0);
1140 GvAV (PL_defgv) = coro->args; coro->args = 0;
1141 GvSV (PL_errgv) = newSV (0);
1142 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1143 GvHV (PL_hintgv) = newHV ();
1144#if PERL_VERSION_ATLEAST (5,10,0)
1145 hv_magic (GvHV (PL_hintgv), 0, PERL_MAGIC_hints);
1146#endif
1147 PL_rs = newSVsv (GvSV (irsgv));
1148 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
544 1149
545 { 1150 {
546 dSP; 1151 dSP;
547 LOGOP myop; 1152 UNOP myop;
548 1153
549 SvREFCNT_dec (GvAV (PL_defgv));
550 GvAV (PL_defgv) = coro->args; coro->args = 0;
551
552 Zero (&myop, 1, LOGOP); 1154 Zero (&myop, 1, UNOP);
553 myop.op_next = Nullop; 1155 myop.op_next = Nullop;
1156 myop.op_type = OP_ENTERSUB;
554 myop.op_flags = OPf_WANT_VOID; 1157 myop.op_flags = OPf_WANT_VOID;
555 1158
556 PUSHMARK (SP); 1159 PUSHMARK (SP);
557 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE)); 1160 PUSHs ((SV *)coro->startcv);
558 PUTBACK; 1161 PUTBACK;
559 PL_op = (OP *)&myop; 1162 PL_op = (OP *)&myop;
560 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1163 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
561 SPAGAIN;
562 } 1164 }
563 1165
564 ENTER; /* necessary e.g. for dounwind */ 1166 /* this newly created coroutine might be run on an existing cctx which most
565} 1167 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1168 */
1169 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1170 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1171 slf_frame.destroy = 0;
566 1172
1173 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1174 init_perl_op.op_next = PL_op;
1175 init_perl_op.op_type = OP_ENTERSUB;
1176 init_perl_op.op_ppaddr = pp_slf;
1177 /* no flags etc. required, as an init function won't be called */
1178
1179 PL_op = (OP *)&init_perl_op;
1180
1181 /* copy throw, in case it was set before init_perl */
1182 CORO_THROW = coro->except;
1183
1184 SWAP_SVS (coro);
1185
1186 if (ecb_expect_false (enable_times))
1187 {
1188 coro_times_update ();
1189 coro_times_sub (coro);
1190 }
1191}
1192
567static void 1193static void
1194coro_unwind_stacks (pTHX)
1195{
1196 if (!IN_DESTRUCT)
1197 {
1198 /* restore all saved variables and stuff */
1199 LEAVE_SCOPE (0);
1200 assert (PL_tmps_floor == -1);
1201
1202 /* free all temporaries */
1203 FREETMPS;
1204 assert (PL_tmps_ix == -1);
1205
1206 /* unwind all extra stacks */
1207 POPSTACK_TO (PL_mainstack);
1208
1209 /* unwind main stack */
1210 dounwind (-1);
1211 }
1212}
1213
1214static void
1215destroy_perl (pTHX_ struct coro *coro)
1216{
1217 SV *svf [9];
1218
1219 {
1220 SV *old_current = SvRV (coro_current);
1221 struct coro *current = SvSTATE (old_current);
1222
1223 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1224
1225 save_perl (aTHX_ current);
1226
1227 /* this will cause transfer_check to croak on block*/
1228 SvRV_set (coro_current, (SV *)coro->hv);
1229
1230 load_perl (aTHX_ coro);
1231
1232 coro_unwind_stacks (aTHX);
1233
1234 /* restore swapped sv's */
1235 SWAP_SVS (coro);
1236
1237 coro_destruct_stacks (aTHX);
1238
1239 /* now save some sv's to be free'd later */
1240 svf [0] = GvSV (PL_defgv);
1241 svf [1] = (SV *)GvAV (PL_defgv);
1242 svf [2] = GvSV (PL_errgv);
1243 svf [3] = (SV *)PL_defoutgv;
1244 svf [4] = PL_rs;
1245 svf [5] = GvSV (irsgv);
1246 svf [6] = (SV *)GvHV (PL_hintgv);
1247 svf [7] = PL_diehook;
1248 svf [8] = PL_warnhook;
1249 assert (9 == sizeof (svf) / sizeof (*svf));
1250
1251 SvRV_set (coro_current, old_current);
1252
1253 load_perl (aTHX_ current);
1254 }
1255
1256 {
1257 unsigned int i;
1258
1259 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1260 SvREFCNT_dec (svf [i]);
1261
1262 SvREFCNT_dec (coro->saved_deffh);
1263 SvREFCNT_dec (coro->rouse_cb);
1264 SvREFCNT_dec (coro->invoke_cb);
1265 SvREFCNT_dec (coro->invoke_av);
1266 }
1267}
1268
1269ecb_inline void
568free_coro_mortal () 1270free_coro_mortal (pTHX)
569{ 1271{
570 if (coro_mortal) 1272 if (ecb_expect_true (coro_mortal))
571 { 1273 {
572 SvREFCNT_dec (coro_mortal); 1274 SvREFCNT_dec ((SV *)coro_mortal);
573 coro_mortal = 0; 1275 coro_mortal = 0;
574 } 1276 }
575} 1277}
576 1278
577/* inject a fake call to Coro::State::_cctx_init into the execution */
578static void NOINLINE
579prepare_cctx (coro_cctx *cctx)
580{
581 dSP;
582 LOGOP myop;
583
584 Zero (&myop, 1, LOGOP);
585 myop.op_next = PL_op;
586 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
587
588 PUSHMARK (SP);
589 EXTEND (SP, 2);
590 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
591 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
592 PUTBACK;
593 PL_op = (OP *)&myop;
594 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
595 SPAGAIN;
596}
597
598static void 1279static int
599coro_run (void *arg) 1280runops_trace (pTHX)
600{ 1281{
601 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1282 COP *oldcop = 0;
602 UNLOCK; 1283 int oldcxix = -2;
603 1284
604 /* 1285 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
605 * this is a _very_ stripped down perl interpreter ;) 1286 {
606 */ 1287 PERL_ASYNC_CHECK ();
1288
1289 if (cctx_current->flags & CC_TRACE_ALL)
1290 {
1291 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1292 {
1293 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1294 SV **bot, **top;
1295 AV *av = newAV (); /* return values */
1296 SV **cb;
1297 dSP;
1298
1299 GV *gv = CvGV (cx->blk_sub.cv);
1300 SV *fullname = sv_2mortal (newSV (0));
1301 if (isGV (gv))
1302 gv_efullname3 (fullname, gv, 0);
1303
1304 bot = PL_stack_base + cx->blk_oldsp + 1;
1305 top = cx->blk_gimme == G_ARRAY ? SP + 1
1306 : cx->blk_gimme == G_SCALAR ? bot + 1
1307 : bot;
1308
1309 av_extend (av, top - bot);
1310 while (bot < top)
1311 av_push (av, SvREFCNT_inc_NN (*bot++));
1312
1313 PL_runops = RUNOPS_DEFAULT;
1314 ENTER;
1315 SAVETMPS;
1316 EXTEND (SP, 3);
1317 PUSHMARK (SP);
1318 PUSHs (&PL_sv_no);
1319 PUSHs (fullname);
1320 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1321 PUTBACK;
1322 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1323 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1324 SPAGAIN;
1325 FREETMPS;
1326 LEAVE;
1327 PL_runops = runops_trace;
1328 }
1329
1330 if (oldcop != PL_curcop)
1331 {
1332 oldcop = PL_curcop;
1333
1334 if (PL_curcop != &PL_compiling)
1335 {
1336 SV **cb;
1337
1338 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1339 {
1340 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1341
1342 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1343 {
1344 dSP;
1345 GV *gv = CvGV (cx->blk_sub.cv);
1346 SV *fullname = sv_2mortal (newSV (0));
1347
1348 if (isGV (gv))
1349 gv_efullname3 (fullname, gv, 0);
1350
1351 PL_runops = RUNOPS_DEFAULT;
1352 ENTER;
1353 SAVETMPS;
1354 EXTEND (SP, 3);
1355 PUSHMARK (SP);
1356 PUSHs (&PL_sv_yes);
1357 PUSHs (fullname);
1358 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1359 PUTBACK;
1360 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1361 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1362 SPAGAIN;
1363 FREETMPS;
1364 LEAVE;
1365 PL_runops = runops_trace;
1366 }
1367
1368 oldcxix = cxstack_ix;
1369 }
1370
1371 if (cctx_current->flags & CC_TRACE_LINE)
1372 {
1373 dSP;
1374
1375 PL_runops = RUNOPS_DEFAULT;
1376 ENTER;
1377 SAVETMPS;
1378 EXTEND (SP, 3);
1379 PL_runops = RUNOPS_DEFAULT;
1380 PUSHMARK (SP);
1381 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1382 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1383 PUTBACK;
1384 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1385 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1386 SPAGAIN;
1387 FREETMPS;
1388 LEAVE;
1389 PL_runops = runops_trace;
1390 }
1391 }
1392 }
1393 }
1394 }
1395
1396 TAINT_NOT;
1397 return 0;
1398}
1399
1400static struct CoroSLF cctx_ssl_frame;
1401
1402static void
1403slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1404{
1405 ta->prev = 0;
1406}
1407
1408static int
1409slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1410{
1411 *frame = cctx_ssl_frame;
1412
1413 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1414}
1415
1416/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1417static void ecb_noinline
1418cctx_prepare (pTHX)
1419{
607 PL_top_env = &PL_start_env; 1420 PL_top_env = &PL_start_env;
608 1421
1422 if (cctx_current->flags & CC_TRACE)
1423 PL_runops = runops_trace;
1424
1425 /* we already must be executing an SLF op, there is no other valid way
1426 * that can lead to creation of a new cctx */
1427 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1428 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1429
1430 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1431 cctx_ssl_frame = slf_frame;
1432
1433 slf_frame.prepare = slf_prepare_set_stacklevel;
1434 slf_frame.check = slf_check_set_stacklevel;
1435}
1436
1437/* the tail of transfer: execute stuff we can only do after a transfer */
1438ecb_inline void
1439transfer_tail (pTHX)
1440{
1441 free_coro_mortal (aTHX);
1442}
1443
1444/* try to exit the same way perl's main function would do */
1445/* we do not bother resetting the environment or other things *7
1446/* that are not, uhm, essential */
1447/* this obviously also doesn't work when perl is embedded */
1448static void ecb_noinline ecb_cold
1449perlish_exit (pTHX)
1450{
1451 int exitstatus = perl_destruct (PL_curinterp);
1452 perl_free (PL_curinterp);
1453 exit (exitstatus);
1454}
1455
1456/*
1457 * this is a _very_ stripped down perl interpreter ;)
1458 */
1459static void
1460cctx_run (void *arg)
1461{
1462#ifdef USE_ITHREADS
1463# if CORO_PTHREAD
1464 PERL_SET_CONTEXT (coro_thx);
1465# endif
1466#endif
1467 {
1468 dTHX;
1469
1470 /* normally we would need to skip the entersub here */
1471 /* not doing so will re-execute it, which is exactly what we want */
1472 /* PL_nop = PL_nop->op_next */
1473
609 /* inject call to cctx_init */ 1474 /* inject a fake subroutine call to cctx_init */
610 prepare_cctx ((coro_cctx *)arg); 1475 cctx_prepare (aTHX);
611 1476
1477 /* cctx_run is the alternative tail of transfer() */
1478 transfer_tail (aTHX);
1479
612 /* somebody will hit me for both perl_run and PL_restartop */ 1480 /* somebody or something will hit me for both perl_run and PL_restartop */
613 PL_restartop = PL_op; 1481 PL_restartop = PL_op;
614 perl_run (PL_curinterp); 1482 perl_run (PL_curinterp);
1483 /*
1484 * Unfortunately, there is no way to get at the return values of the
1485 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1486 * runtime errors here, as this is just a random interpreter, not a thread.
1487 */
615 1488
616 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1489 /*
617 abort (); 1490 * If perl-run returns we assume exit() was being called or the coro
1491 * fell off the end, which seems to be the only valid (non-bug)
1492 * reason for perl_run to return. We try to mimic whatever perl is normally
1493 * doing in that case. YMMV.
1494 */
1495 perlish_exit (aTHX);
1496 }
618} 1497}
619 1498
620static coro_cctx * 1499static coro_cctx *
621cctx_new () 1500cctx_new (void)
622{ 1501{
623 coro_cctx *cctx; 1502 coro_cctx *cctx;
624 1503
625 ++cctx_count; 1504 ++cctx_count;
626
627 Newz (0, cctx, 1, coro_cctx); 1505 New (0, cctx, 1, coro_cctx);
628 1506
629#if HAVE_MMAP 1507 cctx->gen = cctx_gen;
1508 cctx->flags = 0;
1509 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
630 1510
631 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1511 return cctx;
632 /* mmap supposedly does allocate-on-write for us */ 1512}
633 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
634 1513
635 if (cctx->sptr == (void *)-1) 1514/* create a new cctx only suitable as source */
1515static coro_cctx *
1516cctx_new_empty (void)
1517{
1518 coro_cctx *cctx = cctx_new ();
1519
1520 cctx->stack.sptr = 0;
1521 coro_create (&cctx->cctx, 0, 0, 0, 0);
1522
1523 return cctx;
1524}
1525
1526/* create a new cctx suitable as destination/running a perl interpreter */
1527static coro_cctx *
1528cctx_new_run (void)
1529{
1530 coro_cctx *cctx = cctx_new ();
1531
1532 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
636 { 1533 {
637 perror ("FATAL: unable to mmap stack for coroutine"); 1534 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
638 _exit (EXIT_FAILURE); 1535 _exit (EXIT_FAILURE);
639 } 1536 }
640 1537
641# if STACKGUARD
642 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
643# endif
644
645#else
646
647 cctx->ssize = STACKSIZE * (long)sizeof (long);
648 New (0, cctx->sptr, STACKSIZE, long);
649
650 if (!cctx->sptr)
651 {
652 perror ("FATAL: unable to malloc stack for coroutine");
653 _exit (EXIT_FAILURE);
654 }
655
656#endif
657
658#if USE_VALGRIND
659 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
660 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
661 cctx->ssize + (char *)cctx->sptr
662 );
663#endif
664
665 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize); 1538 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
666 1539
667 return cctx; 1540 return cctx;
668} 1541}
669 1542
670static void 1543static void
671cctx_destroy (coro_cctx *cctx) 1544cctx_destroy (coro_cctx *cctx)
672{ 1545{
673 if (!cctx) 1546 if (!cctx)
674 return; 1547 return;
675 1548
1549 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1550
676 --cctx_count; 1551 --cctx_count;
1552 coro_destroy (&cctx->cctx);
677 1553
678#if USE_VALGRIND 1554 coro_stack_free (&cctx->stack);
679 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
680#endif
681
682#if HAVE_MMAP
683 munmap (cctx->sptr, cctx->ssize);
684#else
685 Safefree (cctx->sptr);
686#endif
687 1555
688 Safefree (cctx); 1556 Safefree (cctx);
689} 1557}
690 1558
1559/* wether this cctx should be destructed */
1560#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1561
691static coro_cctx * 1562static coro_cctx *
692cctx_get () 1563cctx_get (pTHX)
693{ 1564{
694 coro_cctx *cctx; 1565 while (ecb_expect_true (cctx_first))
695
696 if (cctx_first)
697 { 1566 {
698 cctx = cctx_first; 1567 coro_cctx *cctx = cctx_first;
699 cctx_first = cctx->next; 1568 cctx_first = cctx->next;
700 --cctx_idle; 1569 --cctx_idle;
701 } 1570
702 else 1571 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
703 { 1572 return cctx;
704 cctx = cctx_new (); 1573
705 PL_op = PL_op->op_next; 1574 cctx_destroy (cctx);
706 } 1575 }
707 1576
708 return cctx; 1577 return cctx_new_run ();
709} 1578}
710 1579
711static void 1580static void
712cctx_put (coro_cctx *cctx) 1581cctx_put (coro_cctx *cctx)
713{ 1582{
1583 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1584
714 /* free another cctx if overlimit */ 1585 /* free another cctx if overlimit */
715 if (cctx_idle >= MAX_IDLE_CCTX) 1586 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
716 { 1587 {
717 coro_cctx *first = cctx_first; 1588 coro_cctx *first = cctx_first;
718 cctx_first = first->next; 1589 cctx_first = first->next;
719 --cctx_idle; 1590 --cctx_idle;
720 1591
721 assert (!first->inuse);
722 cctx_destroy (first); 1592 cctx_destroy (first);
723 } 1593 }
724 1594
725 ++cctx_idle; 1595 ++cctx_idle;
726 cctx->next = cctx_first; 1596 cctx->next = cctx_first;
727 cctx_first = cctx; 1597 cctx_first = cctx;
728} 1598}
729 1599
730/** coroutine switching *****************************************************/ 1600/** coroutine switching *****************************************************/
731 1601
732/* never call directly, always through the coro_state_transfer global variable */ 1602static void
733static void NOINLINE
734transfer (struct coro *prev, struct coro *next) 1603transfer_check (pTHX_ struct coro *prev, struct coro *next)
1604{
1605 /* TODO: throwing up here is considered harmful */
1606
1607 if (ecb_expect_true (prev != next))
1608 {
1609 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1610 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1611
1612 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1613 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1614
1615#if !PERL_VERSION_ATLEAST (5,10,0)
1616 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1617 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1618#endif
1619 }
1620}
1621
1622/* always use the TRANSFER macro */
1623static void ecb_noinline /* noinline so we have a fixed stackframe */
1624transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
735{ 1625{
736 dSTACKLEVEL; 1626 dSTACKLEVEL;
737 1627
738 /* sometimes transfer is only called to set idle_sp */ 1628 /* sometimes transfer is only called to set idle_sp */
739 if (!next) 1629 if (ecb_expect_false (!prev))
740 { 1630 {
741 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1631 cctx_current->idle_sp = STACKLEVEL;
742 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1632 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
743 }
744 else if (prev != next)
745 { 1633 }
1634 else if (ecb_expect_true (prev != next))
1635 {
746 coro_cctx *prev__cctx; 1636 coro_cctx *cctx_prev;
747 1637
748 if (prev->flags & CF_NEW) 1638 if (ecb_expect_false (prev->flags & CF_NEW))
749 { 1639 {
750 /* create a new empty context */ 1640 /* create a new empty/source context */
751 Newz (0, prev->cctx, 1, coro_cctx);
752 prev->cctx->inuse = 1;
753 prev->flags &= ~CF_NEW; 1641 prev->flags &= ~CF_NEW;
754 prev->flags |= CF_RUNNING; 1642 prev->flags |= CF_RUNNING;
755 } 1643 }
756 1644
757 /*TODO: must not croak here */
758 if (!prev->flags & CF_RUNNING)
759 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
760
761 if (next->flags & CF_RUNNING)
762 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
763
764 if (next->flags & CF_DESTROYED)
765 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
766
767 prev->flags &= ~CF_RUNNING; 1645 prev->flags &= ~CF_RUNNING;
768 next->flags |= CF_RUNNING; 1646 next->flags |= CF_RUNNING;
769 1647
770 LOCK; 1648 /* first get rid of the old state */
1649 save_perl (aTHX_ prev);
771 1650
772 if (next->flags & CF_NEW) 1651 if (ecb_expect_false (next->flags & CF_NEW))
773 { 1652 {
774 /* need to start coroutine */ 1653 /* need to start coroutine */
775 next->flags &= ~CF_NEW; 1654 next->flags &= ~CF_NEW;
776 /* first get rid of the old state */
777 save_perl (prev);
778 /* setup coroutine call */ 1655 /* setup coroutine call */
779 setup_coro (next); 1656 init_perl (aTHX_ next);
780 /* need a new stack */
781 assert (!next->cctx);
782 } 1657 }
783 else 1658 else
1659 load_perl (aTHX_ next);
1660
1661 /* possibly untie and reuse the cctx */
1662 if (ecb_expect_true (
1663 cctx_current->idle_sp == STACKLEVEL
1664 && !(cctx_current->flags & CC_TRACE)
1665 && !force_cctx
1666 ))
784 { 1667 {
785 /* coroutine already started */ 1668 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
786 save_perl (prev); 1669 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
787 load_perl (next); 1670
1671 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1672 /* without this the next cctx_get might destroy the running cctx while still in use */
1673 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1674 if (ecb_expect_true (!next->cctx))
1675 next->cctx = cctx_get (aTHX);
1676
1677 cctx_put (cctx_current);
788 } 1678 }
1679 else
1680 prev->cctx = cctx_current;
789 1681
790 prev__cctx = prev->cctx; 1682 ++next->usecount;
791 1683
792 /* possibly "free" the cctx */ 1684 cctx_prev = cctx_current;
793 if (prev__cctx->idle_sp == STACKLEVEL) 1685 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1686
1687 next->cctx = 0;
1688
1689 if (ecb_expect_false (cctx_prev != cctx_current))
794 { 1690 {
795 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1691 cctx_prev->top_env = PL_top_env;
796 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1692 PL_top_env = cctx_current->top_env;
797 1693 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
798 prev->cctx = 0;
799
800 cctx_put (prev__cctx);
801 prev__cctx->inuse = 0;
802 } 1694 }
803 1695
804 if (!next->cctx) 1696 transfer_tail (aTHX);
805 {
806 next->cctx = cctx_get ();
807 assert (!next->cctx->inuse);
808 next->cctx->inuse = 1;
809 }
810
811 if (prev__cctx != next->cctx)
812 {
813 prev__cctx->top_env = PL_top_env;
814 PL_top_env = next->cctx->top_env;
815 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
816 }
817
818 free_coro_mortal ();
819 UNLOCK;
820 } 1697 }
821} 1698}
822 1699
823struct transfer_args 1700#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
824{
825 struct coro *prev, *next;
826};
827
828#define TRANSFER(ta) transfer ((ta).prev, (ta).next) 1701#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
829 1702
830/** high level stuff ********************************************************/ 1703/** high level stuff ********************************************************/
831 1704
1705/* this function is actually Coro, not Coro::State, but we call it from here */
1706/* because it is convenient - but it hasn't been declared yet for that reason */
832static int 1707static void
1708coro_call_on_destroy (pTHX_ struct coro *coro);
1709
1710static void
833coro_state_destroy (struct coro *coro) 1711coro_state_destroy (pTHX_ struct coro *coro)
834{ 1712{
835 if (coro->flags & CF_DESTROYED) 1713 if (coro->flags & CF_ZOMBIE)
836 return 0; 1714 return;
837 1715
1716 slf_destroy (aTHX_ coro);
1717
838 coro->flags |= CF_DESTROYED; 1718 coro->flags |= CF_ZOMBIE;
839 1719
840 if (coro->flags & CF_READY) 1720 if (coro->flags & CF_READY)
841 { 1721 {
842 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1722 /* reduce nready, as destroying a ready coro effectively unreadies it */
843 /* alternative: look through all ready queues and remove the coro */ 1723 /* alternative: look through all ready queues and remove the coro */
844 LOCK;
845 --coro_nready; 1724 --coro_nready;
846 UNLOCK;
847 } 1725 }
848 else 1726 else
849 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1727 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
850 1728
851 if (coro->mainstack && coro->mainstack != main_mainstack) 1729 if (coro->next) coro->next->prev = coro->prev;
852 { 1730 if (coro->prev) coro->prev->next = coro->next;
853 struct coro temp; 1731 if (coro == coro_first) coro_first = coro->next;
854 1732
855 assert (!(coro->flags & CF_RUNNING)); 1733 if (coro->mainstack
856 1734 && coro->mainstack != main_mainstack
857 Zero (&temp, 1, struct coro); 1735 && coro->slot
858 temp.save = CORO_SAVE_ALL; 1736 && !PL_dirty)
859 1737 destroy_perl (aTHX_ coro);
860 if (coro->flags & CF_RUNNING)
861 croak ("FATAL: tried to destroy currently running coroutine");
862
863 save_perl (&temp);
864 load_perl (coro);
865
866 coro_destroy_stacks ();
867
868 load_perl (&temp); /* this will get rid of defsv etc.. */
869
870 coro->mainstack = 0;
871 }
872 1738
873 cctx_destroy (coro->cctx); 1739 cctx_destroy (coro->cctx);
1740 SvREFCNT_dec (coro->startcv);
874 SvREFCNT_dec (coro->args); 1741 SvREFCNT_dec (coro->args);
1742 SvREFCNT_dec (coro->swap_sv);
1743 SvREFCNT_dec (CORO_THROW);
875 1744
876 return 1; 1745 coro_call_on_destroy (aTHX_ coro);
1746
1747 /* more destruction mayhem in coro_state_free */
877} 1748}
878 1749
879static int 1750static int
880coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1751coro_state_free (pTHX_ SV *sv, MAGIC *mg)
881{ 1752{
882 struct coro *coro = (struct coro *)mg->mg_ptr; 1753 struct coro *coro = (struct coro *)mg->mg_ptr;
883 mg->mg_ptr = 0; 1754 mg->mg_ptr = 0;
884 1755
885 if (--coro->refcnt < 0)
886 {
887 coro_state_destroy (coro); 1756 coro_state_destroy (aTHX_ coro);
1757 SvREFCNT_dec (coro->on_destroy);
1758 SvREFCNT_dec (coro->status);
1759
888 Safefree (coro); 1760 Safefree (coro);
889 }
890 1761
891 return 0; 1762 return 0;
892} 1763}
893 1764
894static int 1765static int ecb_cold
895coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1766coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
896{ 1767{
897 struct coro *coro = (struct coro *)mg->mg_ptr; 1768 /* called when perl clones the current process the slow way (windows process emulation) */
898 1769 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
899 ++coro->refcnt; 1770 mg->mg_ptr = 0;
1771 mg->mg_virtual = 0;
900 1772
901 return 0; 1773 return 0;
902} 1774}
903 1775
904static MGVTBL coro_state_vtbl = { 1776static MGVTBL coro_state_vtbl = {
… …
910#else 1782#else
911# define MGf_DUP 0 1783# define MGf_DUP 0
912#endif 1784#endif
913}; 1785};
914 1786
915static struct coro *
916SvSTATE (SV *coro)
917{
918 HV *stash;
919 MAGIC *mg;
920
921 if (SvROK (coro))
922 coro = SvRV (coro);
923
924 stash = SvSTASH (coro);
925 if (stash != coro_stash && stash != coro_state_stash)
926 {
927 /* very slow, but rare, check */
928 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
929 croak ("Coro::State object required");
930 }
931
932 mg = SvMAGIC (coro);
933 assert (mg->mg_type == PERL_MAGIC_ext);
934 return (struct coro *)mg->mg_ptr;
935}
936
937static void 1787static void
938prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1788prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
939{ 1789{
940 ta->prev = SvSTATE (prev_sv); 1790 ta->prev = SvSTATE (prev_sv);
941 ta->next = SvSTATE (next_sv); 1791 ta->next = SvSTATE (next_sv);
1792 TRANSFER_CHECK (*ta);
942} 1793}
943 1794
944static void 1795static void
945api_transfer (SV *prev_sv, SV *next_sv) 1796api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
946{ 1797{
947 struct transfer_args ta; 1798 struct coro_transfer_args ta;
948 1799
949 prepare_transfer (&ta, prev_sv, next_sv); 1800 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
950 TRANSFER (ta); 1801 TRANSFER (ta, 1);
1802}
1803
1804/** Coro ********************************************************************/
1805
1806ecb_inline void
1807coro_enq (pTHX_ struct coro *coro)
1808{
1809 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1810
1811 SvREFCNT_inc_NN (coro->hv);
1812
1813 coro->next_ready = 0;
1814 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1815 ready [1] = coro;
1816}
1817
1818ecb_inline struct coro *
1819coro_deq (pTHX)
1820{
1821 int prio;
1822
1823 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1824 {
1825 struct coro **ready = coro_ready [prio];
1826
1827 if (ready [0])
1828 {
1829 struct coro *coro = ready [0];
1830 ready [0] = coro->next_ready;
1831 return coro;
1832 }
1833 }
1834
1835 return 0;
1836}
1837
1838static void
1839invoke_sv_ready_hook_helper (void)
1840{
1841 dTHX;
1842 dSP;
1843
1844 ENTER;
1845 SAVETMPS;
1846
1847 PUSHMARK (SP);
1848 PUTBACK;
1849 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1850
1851 FREETMPS;
1852 LEAVE;
951} 1853}
952 1854
953static int 1855static int
954api_save (SV *coro_sv, int new_save) 1856api_ready (pTHX_ SV *coro_sv)
955{ 1857{
956 struct coro *coro = SvSTATE (coro_sv); 1858 struct coro *coro = SvSTATE (coro_sv);
957 int old_save = coro->save;
958
959 if (new_save >= 0)
960 coro->save = new_save;
961
962 return old_save;
963}
964
965/** Coro ********************************************************************/
966
967static void
968coro_enq (SV *coro_sv)
969{
970 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
971}
972
973static SV *
974coro_deq (int min_prio)
975{
976 int prio = PRIO_MAX - PRIO_MIN;
977
978 min_prio -= PRIO_MIN;
979 if (min_prio < 0)
980 min_prio = 0;
981
982 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
983 if (AvFILLp (coro_ready [prio]) >= 0)
984 return av_shift (coro_ready [prio]);
985
986 return 0;
987}
988
989static int
990api_ready (SV *coro_sv)
991{
992 struct coro *coro;
993
994 if (SvROK (coro_sv))
995 coro_sv = SvRV (coro_sv);
996
997 coro = SvSTATE (coro_sv);
998 1859
999 if (coro->flags & CF_READY) 1860 if (coro->flags & CF_READY)
1000 return 0; 1861 return 0;
1001 1862
1002 coro->flags |= CF_READY; 1863 coro->flags |= CF_READY;
1003 1864
1004 LOCK; 1865 coro_enq (aTHX_ coro);
1005 coro_enq (SvREFCNT_inc (coro_sv)); 1866
1006 ++coro_nready; 1867 if (!coro_nready++)
1007 UNLOCK; 1868 if (coroapi.readyhook)
1869 coroapi.readyhook ();
1008 1870
1009 return 1; 1871 return 1;
1010} 1872}
1011 1873
1012static int 1874static int
1013api_is_ready (SV *coro_sv) 1875api_is_ready (pTHX_ SV *coro_sv)
1014{ 1876{
1015 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1877 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1016} 1878}
1017 1879
1880/* expects to own a reference to next->hv */
1881ecb_inline void
1882prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1883{
1884 SV *prev_sv = SvRV (coro_current);
1885
1886 ta->prev = SvSTATE_hv (prev_sv);
1887 ta->next = next;
1888
1889 TRANSFER_CHECK (*ta);
1890
1891 SvRV_set (coro_current, (SV *)next->hv);
1892
1893 free_coro_mortal (aTHX);
1894 coro_mortal = prev_sv;
1895}
1896
1018static void 1897static void
1019prepare_schedule (struct transfer_args *ta) 1898prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1020{ 1899{
1021 SV *prev_sv, *next_sv;
1022
1023 for (;;) 1900 for (;;)
1024 { 1901 {
1025 LOCK; 1902 struct coro *next = coro_deq (aTHX);
1026 next_sv = coro_deq (PRIO_MIN);
1027 1903
1904 if (ecb_expect_true (next))
1905 {
1906 /* cannot transfer to destroyed coros, skip and look for next */
1907 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1908 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1909 else
1910 {
1911 next->flags &= ~CF_READY;
1912 --coro_nready;
1913
1914 prepare_schedule_to (aTHX_ ta, next);
1915 break;
1916 }
1917 }
1918 else
1919 {
1028 /* nothing to schedule: call the idle handler */ 1920 /* nothing to schedule: call the idle handler */
1029 if (!next_sv) 1921 if (SvROK (sv_idle)
1922 && SvOBJECT (SvRV (sv_idle)))
1923 {
1924 if (SvRV (sv_idle) == SvRV (coro_current))
1925 {
1926 require_pv ("Carp");
1927
1928 {
1929 dSP;
1930
1931 ENTER;
1932 SAVETMPS;
1933
1934 PUSHMARK (SP);
1935 XPUSHs (sv_2mortal (newSVpv ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught", 0)));
1936 PUTBACK;
1937 call_pv ("Carp::confess", G_VOID | G_DISCARD);
1938
1939 FREETMPS;
1940 LEAVE;
1941 }
1942 }
1943
1944 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1945 api_ready (aTHX_ SvRV (sv_idle));
1946 --coro_nready;
1947 }
1948 else
1949 {
1950 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1951 dSP;
1952
1953 ENTER;
1954 SAVETMPS;
1955
1956 PUSHMARK (SP);
1957 PUTBACK;
1958 call_sv (sv_idle, G_VOID | G_DISCARD);
1959
1960 FREETMPS;
1961 LEAVE;
1962 }
1963 }
1964 }
1965}
1966
1967ecb_inline void
1968prepare_cede (pTHX_ struct coro_transfer_args *ta)
1969{
1970 api_ready (aTHX_ coro_current);
1971 prepare_schedule (aTHX_ ta);
1972}
1973
1974ecb_inline void
1975prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1976{
1977 SV *prev = SvRV (coro_current);
1978
1979 if (coro_nready)
1980 {
1981 prepare_schedule (aTHX_ ta);
1982 api_ready (aTHX_ prev);
1983 }
1984 else
1985 prepare_nop (aTHX_ ta);
1986}
1987
1988static void
1989api_schedule (pTHX)
1990{
1991 struct coro_transfer_args ta;
1992
1993 prepare_schedule (aTHX_ &ta);
1994 TRANSFER (ta, 1);
1995}
1996
1997static void
1998api_schedule_to (pTHX_ SV *coro_sv)
1999{
2000 struct coro_transfer_args ta;
2001 struct coro *next = SvSTATE (coro_sv);
2002
2003 SvREFCNT_inc_NN (coro_sv);
2004 prepare_schedule_to (aTHX_ &ta, next);
2005}
2006
2007static int
2008api_cede (pTHX)
2009{
2010 struct coro_transfer_args ta;
2011
2012 prepare_cede (aTHX_ &ta);
2013
2014 if (ecb_expect_true (ta.prev != ta.next))
2015 {
2016 TRANSFER (ta, 1);
2017 return 1;
2018 }
2019 else
2020 return 0;
2021}
2022
2023static int
2024api_cede_notself (pTHX)
2025{
2026 if (coro_nready)
2027 {
2028 struct coro_transfer_args ta;
2029
2030 prepare_cede_notself (aTHX_ &ta);
2031 TRANSFER (ta, 1);
2032 return 1;
2033 }
2034 else
2035 return 0;
2036}
2037
2038static void
2039api_trace (pTHX_ SV *coro_sv, int flags)
2040{
2041 struct coro *coro = SvSTATE (coro_sv);
2042
2043 if (coro->flags & CF_RUNNING)
2044 croak ("cannot enable tracing on a running coroutine, caught");
2045
2046 if (flags & CC_TRACE)
2047 {
2048 if (!coro->cctx)
2049 coro->cctx = cctx_new_run ();
2050 else if (!(coro->cctx->flags & CC_TRACE))
2051 croak ("cannot enable tracing on coroutine with custom stack, caught");
2052
2053 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2054 }
2055 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2056 {
2057 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2058
2059 if (coro->flags & CF_RUNNING)
2060 PL_runops = RUNOPS_DEFAULT;
2061 else
2062 coro->slot->runops = RUNOPS_DEFAULT;
2063 }
2064}
2065
2066static void
2067coro_push_av (pTHX_ AV *av, I32 gimme_v)
2068{
2069 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2070 {
2071 dSP;
2072
2073 if (gimme_v == G_SCALAR)
2074 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2075 else
2076 {
2077 int i;
2078 EXTEND (SP, AvFILLp (av) + 1);
2079
2080 for (i = 0; i <= AvFILLp (av); ++i)
2081 PUSHs (AvARRAY (av)[i]);
2082 }
2083
2084 PUTBACK;
2085 }
2086}
2087
2088static void
2089coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2090{
2091 if (!coro->on_destroy)
2092 coro->on_destroy = newAV ();
2093
2094 av_push (coro->on_destroy, cb);
2095}
2096
2097static void
2098slf_destroy_join (pTHX_ struct CoroSLF *frame)
2099{
2100 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2101}
2102
2103static int
2104slf_check_join (pTHX_ struct CoroSLF *frame)
2105{
2106 struct coro *coro = (struct coro *)frame->data;
2107
2108 if (!coro->status)
2109 return 1;
2110
2111 frame->destroy = 0;
2112
2113 coro_push_av (aTHX_ coro->status, GIMME_V);
2114
2115 SvREFCNT_dec ((SV *)coro->hv);
2116
2117 return 0;
2118}
2119
2120static void
2121slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2122{
2123 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2124
2125 if (items > 1)
2126 croak ("join called with too many arguments");
2127
2128 if (coro->status)
2129 frame->prepare = prepare_nop;
2130 else
2131 {
2132 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2133 frame->prepare = prepare_schedule;
2134 }
2135
2136 frame->check = slf_check_join;
2137 frame->destroy = slf_destroy_join;
2138 frame->data = (void *)coro;
2139 SvREFCNT_inc (coro->hv);
2140}
2141
2142static void
2143coro_call_on_destroy (pTHX_ struct coro *coro)
2144{
2145 AV *od = coro->on_destroy;
2146
2147 if (!od)
2148 return;
2149
2150 coro->on_destroy = 0;
2151 sv_2mortal ((SV *)od);
2152
2153 while (AvFILLp (od) >= 0)
2154 {
2155 SV *cb = sv_2mortal (av_pop (od));
2156
2157 /* coro hv's (and only hv's at the moment) are supported as well */
2158 if (SvSTATEhv_p (aTHX_ cb))
2159 api_ready (aTHX_ cb);
2160 else
2161 {
2162 dSP; /* don't disturb outer sp */
2163 PUSHMARK (SP);
2164
2165 if (coro->status)
2166 {
2167 PUTBACK;
2168 coro_push_av (aTHX_ coro->status, G_ARRAY);
2169 SPAGAIN;
2170 }
2171
2172 PUTBACK;
2173 call_sv (cb, G_VOID | G_DISCARD);
2174 }
2175 }
2176}
2177
2178static void
2179coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2180{
2181 AV *av;
2182
2183 if (coro->status)
2184 {
2185 av = coro->status;
2186 av_clear (av);
2187 }
2188 else
2189 av = coro->status = newAV ();
2190
2191 /* items are actually not so common, so optimise for this case */
2192 if (items)
2193 {
2194 int i;
2195
2196 av_extend (av, items - 1);
2197
2198 for (i = 0; i < items; ++i)
2199 av_push (av, SvREFCNT_inc_NN (arg [i]));
2200 }
2201}
2202
2203static void
2204slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2205{
2206 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2207 api_ready (aTHX_ sv_manager);
2208
2209 frame->prepare = prepare_schedule;
2210 frame->check = slf_check_repeat;
2211
2212 /* as a minor optimisation, we could unwind all stacks here */
2213 /* but that puts extra pressure on pp_slf, and is not worth much */
2214 /*coro_unwind_stacks (aTHX);*/
2215}
2216
2217static void
2218slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2219{
2220 HV *coro_hv = (HV *)SvRV (coro_current);
2221
2222 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2223 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2224}
2225
2226static void
2227slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2228{
2229 HV *coro_hv;
2230 struct coro *coro;
2231
2232 if (items <= 0)
2233 croak ("Coro::cancel called without coro object,");
2234
2235 coro = SvSTATE (arg [0]);
2236 coro_hv = coro->hv;
2237
2238 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2239
2240 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2241 {
2242 /* coro currently busy cancelling something, so just notify it */
2243 coro->slf_frame.data = (void *)coro;
2244
2245 frame->prepare = prepare_nop;
2246 frame->check = slf_check_nop;
2247 }
2248 else if (coro_hv == (HV *)SvRV (coro_current))
2249 {
2250 /* cancelling the current coro is allowed, and equals terminate */
2251 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2252 }
2253 else
2254 {
2255 struct coro *self = SvSTATE_current;
2256
2257 if (!self)
2258 croak ("Coro::cancel called outside of thread content,");
2259
2260 /* otherwise we cancel directly, purely for speed reasons
2261 * unfortunately, this requires some magic trickery, as
2262 * somebody else could cancel us, so we have to fight the cancellation.
2263 * this is ugly, and hopefully fully worth the extra speed.
2264 * besides, I can't get the slow-but-safe version working...
2265 */
2266 slf_frame.data = 0;
2267 self->flags |= CF_NOCANCEL;
2268 coro_state_destroy (aTHX_ coro);
2269 self->flags &= ~CF_NOCANCEL;
2270
2271 if (slf_frame.data)
2272 {
2273 /* while we were busy we have been cancelled, so terminate */
2274 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2275 }
2276 else
2277 {
2278 frame->prepare = prepare_nop;
2279 frame->check = slf_check_nop;
2280 }
2281 }
2282}
2283
2284static int
2285slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2286{
2287 frame->prepare = 0;
2288 coro_unwind_stacks (aTHX);
2289
2290 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2291
2292 return 1;
2293}
2294
2295static int
2296safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2297{
2298 if (coro->cctx)
2299 croak ("coro inside C callback, unable to cancel at this time, caught");
2300
2301 if (coro->flags & CF_NEW)
2302 {
2303 coro_set_status (aTHX_ coro, arg, items);
2304 coro_state_destroy (aTHX_ coro);
2305 }
2306 else
2307 {
2308 if (!coro->slf_frame.prepare)
2309 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2310
2311 slf_destroy (aTHX_ coro);
2312
2313 coro_set_status (aTHX_ coro, arg, items);
2314 coro->slf_frame.prepare = prepare_nop;
2315 coro->slf_frame.check = slf_check_safe_cancel;
2316
2317 api_ready (aTHX_ (SV *)coro->hv);
2318 }
2319
2320 return 1;
2321}
2322
2323/*****************************************************************************/
2324/* async pool handler */
2325
2326static int
2327slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2328{
2329 HV *hv = (HV *)SvRV (coro_current);
2330 struct coro *coro = (struct coro *)frame->data;
2331
2332 if (!coro->invoke_cb)
2333 return 1; /* loop till we have invoke */
2334 else
2335 {
2336 hv_store (hv, "desc", sizeof ("desc") - 1,
2337 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2338
2339 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2340
2341 {
2342 dSP;
2343 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2344 PUTBACK;
2345 }
2346
2347 SvREFCNT_dec (GvAV (PL_defgv));
2348 GvAV (PL_defgv) = coro->invoke_av;
2349 coro->invoke_av = 0;
2350
2351 return 0;
2352 }
2353}
2354
2355static void
2356slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2357{
2358 HV *hv = (HV *)SvRV (coro_current);
2359 struct coro *coro = SvSTATE_hv ((SV *)hv);
2360
2361 if (ecb_expect_true (coro->saved_deffh))
2362 {
2363 /* subsequent iteration */
2364 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2365 coro->saved_deffh = 0;
2366
2367 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2368 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2369 {
2370 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2371 return;
2372 }
2373 else
2374 {
2375 av_clear (GvAV (PL_defgv));
2376 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2377
2378 coro->prio = 0;
2379
2380 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2381 api_trace (aTHX_ coro_current, 0);
2382
2383 frame->prepare = prepare_schedule;
2384 av_push (av_async_pool, SvREFCNT_inc (hv));
2385 }
2386 }
2387 else
2388 {
2389 /* first iteration, simply fall through */
2390 frame->prepare = prepare_nop;
2391 }
2392
2393 frame->check = slf_check_pool_handler;
2394 frame->data = (void *)coro;
2395}
2396
2397/*****************************************************************************/
2398/* rouse callback */
2399
2400#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2401
2402static void
2403coro_rouse_callback (pTHX_ CV *cv)
2404{
2405 dXSARGS;
2406 SV *data = (SV *)S_GENSUB_ARG;
2407
2408 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2409 {
2410 /* first call, set args */
2411 SV *coro = SvRV (data);
2412 AV *av = newAV ();
2413
2414 SvRV_set (data, (SV *)av);
2415
2416 /* better take a full copy of the arguments */
2417 while (items--)
2418 av_store (av, items, newSVsv (ST (items)));
2419
2420 api_ready (aTHX_ coro);
2421 SvREFCNT_dec (coro);
2422 }
2423
2424 XSRETURN_EMPTY;
2425}
2426
2427static int
2428slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2429{
2430 SV *data = (SV *)frame->data;
2431
2432 if (CORO_THROW)
2433 return 0;
2434
2435 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2436 return 1;
2437
2438 /* now push all results on the stack */
2439 {
2440 dSP;
2441 AV *av = (AV *)SvRV (data);
2442 int i;
2443
2444 EXTEND (SP, AvFILLp (av) + 1);
2445 for (i = 0; i <= AvFILLp (av); ++i)
2446 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2447
2448 /* we have stolen the elements, so set length to zero and free */
2449 AvFILLp (av) = -1;
2450 av_undef (av);
2451
2452 PUTBACK;
2453 }
2454
2455 return 0;
2456}
2457
2458static void
2459slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2460{
2461 SV *cb;
2462
2463 if (items)
2464 cb = arg [0];
2465 else
2466 {
2467 struct coro *coro = SvSTATE_current;
2468
2469 if (!coro->rouse_cb)
2470 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2471
2472 cb = sv_2mortal (coro->rouse_cb);
2473 coro->rouse_cb = 0;
2474 }
2475
2476 if (!SvROK (cb)
2477 || SvTYPE (SvRV (cb)) != SVt_PVCV
2478 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2479 croak ("Coro::rouse_wait called with illegal callback argument,");
2480
2481 {
2482 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2483 SV *data = (SV *)S_GENSUB_ARG;
2484
2485 frame->data = (void *)data;
2486 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2487 frame->check = slf_check_rouse_wait;
2488 }
2489}
2490
2491static SV *
2492coro_new_rouse_cb (pTHX)
2493{
2494 HV *hv = (HV *)SvRV (coro_current);
2495 struct coro *coro = SvSTATE_hv (hv);
2496 SV *data = newRV_inc ((SV *)hv);
2497 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2498
2499 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2500 SvREFCNT_dec (data); /* magicext increases the refcount */
2501
2502 SvREFCNT_dec (coro->rouse_cb);
2503 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2504
2505 return cb;
2506}
2507
2508/*****************************************************************************/
2509/* schedule-like-function opcode (SLF) */
2510
2511static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2512static const CV *slf_cv;
2513static SV **slf_argv;
2514static int slf_argc, slf_arga; /* count, allocated */
2515static I32 slf_ax; /* top of stack, for restore */
2516
2517/* this restores the stack in the case we patched the entersub, to */
2518/* recreate the stack frame as perl will on following calls */
2519/* since entersub cleared the stack */
2520static OP *
2521pp_restore (pTHX)
2522{
2523 int i;
2524 SV **SP = PL_stack_base + slf_ax;
2525
2526 PUSHMARK (SP);
2527
2528 EXTEND (SP, slf_argc + 1);
2529
2530 for (i = 0; i < slf_argc; ++i)
2531 PUSHs (sv_2mortal (slf_argv [i]));
2532
2533 PUSHs ((SV *)CvGV (slf_cv));
2534
2535 RETURNOP (slf_restore.op_first);
2536}
2537
2538static void
2539slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2540{
2541 SV **arg = (SV **)slf_frame.data;
2542
2543 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2544}
2545
2546static void
2547slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2548{
2549 if (items != 2)
2550 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2551
2552 frame->prepare = slf_prepare_transfer;
2553 frame->check = slf_check_nop;
2554 frame->data = (void *)arg; /* let's hope it will stay valid */
2555}
2556
2557static void
2558slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2559{
2560 frame->prepare = prepare_schedule;
2561 frame->check = slf_check_nop;
2562}
2563
2564static void
2565slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2566{
2567 struct coro *next = (struct coro *)slf_frame.data;
2568
2569 SvREFCNT_inc_NN (next->hv);
2570 prepare_schedule_to (aTHX_ ta, next);
2571}
2572
2573static void
2574slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2575{
2576 if (!items)
2577 croak ("Coro::schedule_to expects a coroutine argument, caught");
2578
2579 frame->data = (void *)SvSTATE (arg [0]);
2580 frame->prepare = slf_prepare_schedule_to;
2581 frame->check = slf_check_nop;
2582}
2583
2584static void
2585slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2586{
2587 api_ready (aTHX_ SvRV (coro_current));
2588
2589 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2590}
2591
2592static void
2593slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2594{
2595 frame->prepare = prepare_cede;
2596 frame->check = slf_check_nop;
2597}
2598
2599static void
2600slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2601{
2602 frame->prepare = prepare_cede_notself;
2603 frame->check = slf_check_nop;
2604}
2605
2606/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2607static void
2608slf_destroy (pTHX_ struct coro *coro)
2609{
2610 struct CoroSLF frame = coro->slf_frame;
2611
2612 /*
2613 * The on_destroy below most likely is from an SLF call.
2614 * Since by definition the SLF call will not finish when we destroy
2615 * the coro, we will have to force-finish it here, otherwise
2616 * cleanup functions cannot call SLF functions.
2617 */
2618 coro->slf_frame.prepare = 0;
2619
2620 /* this callback is reserved for slf functions needing to do cleanup */
2621 if (frame.destroy && frame.prepare && !PL_dirty)
2622 frame.destroy (aTHX_ &frame);
2623}
2624
2625/*
2626 * these not obviously related functions are all rolled into one
2627 * function to increase chances that they all will call transfer with the same
2628 * stack offset
2629 * SLF stands for "schedule-like-function".
2630 */
2631static OP *
2632pp_slf (pTHX)
2633{
2634 I32 checkmark; /* mark SP to see how many elements check has pushed */
2635
2636 /* set up the slf frame, unless it has already been set-up */
2637 /* the latter happens when a new coro has been started */
2638 /* or when a new cctx was attached to an existing coroutine */
2639 if (ecb_expect_true (!slf_frame.prepare))
2640 {
2641 /* first iteration */
2642 dSP;
2643 SV **arg = PL_stack_base + TOPMARK + 1;
2644 int items = SP - arg; /* args without function object */
2645 SV *gv = *sp;
2646
2647 /* do a quick consistency check on the "function" object, and if it isn't */
2648 /* for us, divert to the real entersub */
2649 if (SvTYPE (gv) != SVt_PVGV
2650 || !GvCV (gv)
2651 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2652 return PL_ppaddr[OP_ENTERSUB](aTHX);
2653
2654 if (!(PL_op->op_flags & OPf_STACKED))
2655 {
2656 /* ampersand-form of call, use @_ instead of stack */
2657 AV *av = GvAV (PL_defgv);
2658 arg = AvARRAY (av);
2659 items = AvFILLp (av) + 1;
2660 }
2661
2662 /* now call the init function, which needs to set up slf_frame */
2663 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2664 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2665
2666 /* pop args */
2667 SP = PL_stack_base + POPMARK;
2668
2669 PUTBACK;
2670 }
2671
2672 /* now that we have a slf_frame, interpret it! */
2673 /* we use a callback system not to make the code needlessly */
2674 /* complicated, but so we can run multiple perl coros from one cctx */
2675
2676 do
2677 {
2678 struct coro_transfer_args ta;
2679
2680 slf_frame.prepare (aTHX_ &ta);
2681 TRANSFER (ta, 0);
2682
2683 checkmark = PL_stack_sp - PL_stack_base;
2684 }
2685 while (slf_frame.check (aTHX_ &slf_frame));
2686
2687 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2688
2689 /* exception handling */
2690 if (ecb_expect_false (CORO_THROW))
2691 {
2692 SV *exception = sv_2mortal (CORO_THROW);
2693
2694 CORO_THROW = 0;
2695 sv_setsv (ERRSV, exception);
2696 croak (0);
2697 }
2698
2699 /* return value handling - mostly like entersub */
2700 /* make sure we put something on the stack in scalar context */
2701 if (GIMME_V == G_SCALAR
2702 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2703 {
2704 dSP;
2705 SV **bot = PL_stack_base + checkmark;
2706
2707 if (sp == bot) /* too few, push undef */
2708 bot [1] = &PL_sv_undef;
2709 else /* too many, take last one */
2710 bot [1] = *sp;
2711
2712 SP = bot + 1;
2713
2714 PUTBACK;
2715 }
2716
2717 return NORMAL;
2718}
2719
2720static void
2721api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2722{
2723 int i;
2724 SV **arg = PL_stack_base + ax;
2725 int items = PL_stack_sp - arg + 1;
2726
2727 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2728
2729 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2730 && PL_op->op_ppaddr != pp_slf)
2731 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2732
2733 CvFLAGS (cv) |= CVf_SLF;
2734 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2735 slf_cv = cv;
2736
2737 /* we patch the op, and then re-run the whole call */
2738 /* we have to put the same argument on the stack for this to work */
2739 /* and this will be done by pp_restore */
2740 slf_restore.op_next = (OP *)&slf_restore;
2741 slf_restore.op_type = OP_CUSTOM;
2742 slf_restore.op_ppaddr = pp_restore;
2743 slf_restore.op_first = PL_op;
2744
2745 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2746
2747 if (PL_op->op_flags & OPf_STACKED)
2748 {
2749 if (items > slf_arga)
2750 {
2751 slf_arga = items;
2752 Safefree (slf_argv);
2753 New (0, slf_argv, slf_arga, SV *);
2754 }
2755
2756 slf_argc = items;
2757
2758 for (i = 0; i < items; ++i)
2759 slf_argv [i] = SvREFCNT_inc (arg [i]);
2760 }
2761 else
2762 slf_argc = 0;
2763
2764 PL_op->op_ppaddr = pp_slf;
2765 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2766
2767 PL_op = (OP *)&slf_restore;
2768}
2769
2770/*****************************************************************************/
2771/* dynamic wind */
2772
2773static void
2774on_enterleave_call (pTHX_ SV *cb)
2775{
2776 dSP;
2777
2778 PUSHSTACK;
2779
2780 PUSHMARK (SP);
2781 PUTBACK;
2782 call_sv (cb, G_VOID | G_DISCARD);
2783 SPAGAIN;
2784
2785 POPSTACK;
2786}
2787
2788static SV *
2789coro_avp_pop_and_free (pTHX_ AV **avp)
2790{
2791 AV *av = *avp;
2792 SV *res = av_pop (av);
2793
2794 if (AvFILLp (av) < 0)
2795 {
2796 *avp = 0;
2797 SvREFCNT_dec (av);
2798 }
2799
2800 return res;
2801}
2802
2803static void
2804coro_pop_on_enter (pTHX_ void *coro)
2805{
2806 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2807 SvREFCNT_dec (cb);
2808}
2809
2810static void
2811coro_pop_on_leave (pTHX_ void *coro)
2812{
2813 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2814 on_enterleave_call (aTHX_ sv_2mortal (cb));
2815}
2816
2817/*****************************************************************************/
2818/* PerlIO::cede */
2819
2820typedef struct
2821{
2822 PerlIOBuf base;
2823 NV next, every;
2824} PerlIOCede;
2825
2826static IV ecb_cold
2827PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2828{
2829 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2830
2831 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2832 self->next = nvtime () + self->every;
2833
2834 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2835}
2836
2837static SV * ecb_cold
2838PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2839{
2840 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2841
2842 return newSVnv (self->every);
2843}
2844
2845static IV
2846PerlIOCede_flush (pTHX_ PerlIO *f)
2847{
2848 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2849 double now = nvtime ();
2850
2851 if (now >= self->next)
2852 {
2853 api_cede (aTHX);
2854 self->next = now + self->every;
2855 }
2856
2857 return PerlIOBuf_flush (aTHX_ f);
2858}
2859
2860static PerlIO_funcs PerlIO_cede =
2861{
2862 sizeof(PerlIO_funcs),
2863 "cede",
2864 sizeof(PerlIOCede),
2865 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2866 PerlIOCede_pushed,
2867 PerlIOBuf_popped,
2868 PerlIOBuf_open,
2869 PerlIOBase_binmode,
2870 PerlIOCede_getarg,
2871 PerlIOBase_fileno,
2872 PerlIOBuf_dup,
2873 PerlIOBuf_read,
2874 PerlIOBuf_unread,
2875 PerlIOBuf_write,
2876 PerlIOBuf_seek,
2877 PerlIOBuf_tell,
2878 PerlIOBuf_close,
2879 PerlIOCede_flush,
2880 PerlIOBuf_fill,
2881 PerlIOBase_eof,
2882 PerlIOBase_error,
2883 PerlIOBase_clearerr,
2884 PerlIOBase_setlinebuf,
2885 PerlIOBuf_get_base,
2886 PerlIOBuf_bufsiz,
2887 PerlIOBuf_get_ptr,
2888 PerlIOBuf_get_cnt,
2889 PerlIOBuf_set_ptrcnt,
2890};
2891
2892/*****************************************************************************/
2893/* Coro::Semaphore & Coro::Signal */
2894
2895static SV *
2896coro_waitarray_new (pTHX_ int count)
2897{
2898 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2899 AV *av = newAV ();
2900 SV **ary;
2901
2902 /* unfortunately, building manually saves memory */
2903 Newx (ary, 2, SV *);
2904 AvALLOC (av) = ary;
2905#if PERL_VERSION_ATLEAST (5,10,0)
2906 AvARRAY (av) = ary;
2907#else
2908 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2909 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2910 SvPVX ((SV *)av) = (char *)ary;
2911#endif
2912 AvMAX (av) = 1;
2913 AvFILLp (av) = 0;
2914 ary [0] = newSViv (count);
2915
2916 return newRV_noinc ((SV *)av);
2917}
2918
2919/* semaphore */
2920
2921static void
2922coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2923{
2924 SV *count_sv = AvARRAY (av)[0];
2925 IV count = SvIVX (count_sv);
2926
2927 count += adjust;
2928 SvIVX (count_sv) = count;
2929
2930 /* now wake up as many waiters as are expected to lock */
2931 while (count > 0 && AvFILLp (av) > 0)
2932 {
2933 SV *cb;
2934
2935 /* swap first two elements so we can shift a waiter */
2936 AvARRAY (av)[0] = AvARRAY (av)[1];
2937 AvARRAY (av)[1] = count_sv;
2938 cb = av_shift (av);
2939
2940 if (SvOBJECT (cb))
2941 {
2942 api_ready (aTHX_ cb);
2943 --count;
2944 }
2945 else if (SvTYPE (cb) == SVt_PVCV)
1030 { 2946 {
1031 dSP; 2947 dSP;
1032 UNLOCK;
1033
1034 ENTER;
1035 SAVETMPS;
1036
1037 PUSHMARK (SP); 2948 PUSHMARK (SP);
2949 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1038 PUTBACK; 2950 PUTBACK;
1039 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 2951 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1040
1041 FREETMPS;
1042 LEAVE;
1043 continue;
1044 } 2952 }
1045 2953
1046 ta->next = SvSTATE (next_sv); 2954 SvREFCNT_dec (cb);
2955 }
2956}
1047 2957
1048 /* cannot transfer to destroyed coros, skip and look for next */ 2958static void
1049 if (ta->next->flags & CF_DESTROYED) 2959coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2960{
2961 /* call $sem->adjust (0) to possibly wake up some other waiters */
2962 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2963}
2964
2965static int
2966slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2967{
2968 AV *av = (AV *)frame->data;
2969 SV *count_sv = AvARRAY (av)[0];
2970 SV *coro_hv = SvRV (coro_current);
2971
2972 frame->destroy = 0;
2973
2974 /* if we are about to throw, don't actually acquire the lock, just throw */
2975 if (ecb_expect_false (CORO_THROW))
2976 {
2977 /* we still might be responsible for the semaphore, so wake up others */
2978 coro_semaphore_adjust (aTHX_ av, 0);
2979
2980 return 0;
2981 }
2982 else if (SvIVX (count_sv) > 0)
2983 {
2984 if (acquire)
2985 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2986 else
2987 coro_semaphore_adjust (aTHX_ av, 0);
2988
2989 return 0;
2990 }
2991 else
2992 {
2993 int i;
2994 /* if we were woken up but can't down, we look through the whole */
2995 /* waiters list and only add us if we aren't in there already */
2996 /* this avoids some degenerate memory usage cases */
2997 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
2998 if (AvARRAY (av)[i] == coro_hv)
2999 return 1;
3000
3001 av_push (av, SvREFCNT_inc (coro_hv));
3002 return 1;
3003 }
3004}
3005
3006static int
3007slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
3008{
3009 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
3010}
3011
3012static int
3013slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
3014{
3015 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3016}
3017
3018static void
3019slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3020{
3021 AV *av = (AV *)SvRV (arg [0]);
3022
3023 if (SvIVX (AvARRAY (av)[0]) > 0)
3024 {
3025 frame->data = (void *)av;
3026 frame->prepare = prepare_nop;
3027 }
3028 else
3029 {
3030 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3031
3032 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3033 frame->prepare = prepare_schedule;
3034 /* to avoid race conditions when a woken-up coro gets terminated */
3035 /* we arrange for a temporary on_destroy that calls adjust (0) */
3036 frame->destroy = coro_semaphore_destroy;
3037 }
3038}
3039
3040static void
3041slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3042{
3043 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3044 frame->check = slf_check_semaphore_down;
3045}
3046
3047static void
3048slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3049{
3050 if (items >= 2)
3051 {
3052 /* callback form */
3053 AV *av = (AV *)SvRV (arg [0]);
3054 SV *cb_cv = s_get_cv_croak (arg [1]);
3055
3056 av_push (av, SvREFCNT_inc_NN (cb_cv));
3057
3058 if (SvIVX (AvARRAY (av)[0]) > 0)
3059 coro_semaphore_adjust (aTHX_ av, 0);
3060
3061 frame->prepare = prepare_nop;
3062 frame->check = slf_check_nop;
3063 }
3064 else
3065 {
3066 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3067 frame->check = slf_check_semaphore_wait;
3068 }
3069}
3070
3071/* signal */
3072
3073static void
3074coro_signal_wake (pTHX_ AV *av, int count)
3075{
3076 SvIVX (AvARRAY (av)[0]) = 0;
3077
3078 /* now signal count waiters */
3079 while (count > 0 && AvFILLp (av) > 0)
3080 {
3081 SV *cb;
3082
3083 /* swap first two elements so we can shift a waiter */
3084 cb = AvARRAY (av)[0];
3085 AvARRAY (av)[0] = AvARRAY (av)[1];
3086 AvARRAY (av)[1] = cb;
3087
3088 cb = av_shift (av);
3089
3090 if (SvTYPE (cb) == SVt_PVCV)
1050 { 3091 {
3092 dSP;
3093 PUSHMARK (SP);
3094 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1051 UNLOCK; 3095 PUTBACK;
1052 SvREFCNT_dec (next_sv); 3096 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1053 /* coro_nready is already taken care of by destroy */
1054 continue;
1055 } 3097 }
3098 else
3099 {
3100 api_ready (aTHX_ cb);
3101 sv_setiv (cb, 0); /* signal waiter */
3102 }
1056 3103
1057 --coro_nready; 3104 SvREFCNT_dec (cb);
1058 UNLOCK;
1059 break;
1060 }
1061 3105
1062 /* free this only after the transfer */ 3106 --count;
1063 prev_sv = SvRV (coro_current); 3107 }
1064 SvRV_set (coro_current, next_sv);
1065 ta->prev = SvSTATE (prev_sv);
1066
1067 assert (ta->next->flags & CF_READY);
1068 ta->next->flags &= ~CF_READY;
1069
1070 LOCK;
1071 free_coro_mortal ();
1072 coro_mortal = prev_sv;
1073 UNLOCK;
1074}
1075
1076static void
1077prepare_cede (struct transfer_args *ta)
1078{
1079 api_ready (coro_current);
1080 prepare_schedule (ta);
1081} 3108}
1082 3109
1083static int 3110static int
1084prepare_cede_notself (struct transfer_args *ta) 3111slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
1085{ 3112{
1086 if (coro_nready) 3113 /* if we are about to throw, also stop waiting */
3114 return SvROK ((SV *)frame->data) && !CORO_THROW;
3115}
3116
3117static void
3118slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3119{
3120 AV *av = (AV *)SvRV (arg [0]);
3121
3122 if (items >= 2)
3123 {
3124 SV *cb_cv = s_get_cv_croak (arg [1]);
3125 av_push (av, SvREFCNT_inc_NN (cb_cv));
3126
3127 if (SvIVX (AvARRAY (av)[0]))
3128 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3129
3130 frame->prepare = prepare_nop;
3131 frame->check = slf_check_nop;
1087 { 3132 }
1088 SV *prev = SvRV (coro_current); 3133 else if (SvIVX (AvARRAY (av)[0]))
1089 prepare_schedule (ta); 3134 {
1090 api_ready (prev); 3135 SvIVX (AvARRAY (av)[0]) = 0;
1091 return 1; 3136 frame->prepare = prepare_nop;
3137 frame->check = slf_check_nop;
1092 } 3138 }
1093 else 3139 else
3140 {
3141 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3142
3143 av_push (av, waiter);
3144
3145 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3146 frame->prepare = prepare_schedule;
3147 frame->check = slf_check_signal_wait;
3148 }
3149}
3150
3151/*****************************************************************************/
3152/* Coro::AIO */
3153
3154#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3155
3156/* helper storage struct */
3157struct io_state
3158{
3159 int errorno;
3160 I32 laststype; /* U16 in 5.10.0 */
3161 int laststatval;
3162 Stat_t statcache;
3163};
3164
3165static void
3166coro_aio_callback (pTHX_ CV *cv)
3167{
3168 dXSARGS;
3169 AV *state = (AV *)S_GENSUB_ARG;
3170 SV *coro = av_pop (state);
3171 SV *data_sv = newSV (sizeof (struct io_state));
3172
3173 av_extend (state, items - 1);
3174
3175 sv_upgrade (data_sv, SVt_PV);
3176 SvCUR_set (data_sv, sizeof (struct io_state));
3177 SvPOK_only (data_sv);
3178
3179 {
3180 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3181
3182 data->errorno = errno;
3183 data->laststype = PL_laststype;
3184 data->laststatval = PL_laststatval;
3185 data->statcache = PL_statcache;
3186 }
3187
3188 /* now build the result vector out of all the parameters and the data_sv */
3189 {
3190 int i;
3191
3192 for (i = 0; i < items; ++i)
3193 av_push (state, SvREFCNT_inc_NN (ST (i)));
3194 }
3195
3196 av_push (state, data_sv);
3197
3198 api_ready (aTHX_ coro);
3199 SvREFCNT_dec (coro);
3200 SvREFCNT_dec ((AV *)state);
3201}
3202
3203static int
3204slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3205{
3206 AV *state = (AV *)frame->data;
3207
3208 /* if we are about to throw, return early */
3209 /* this does not cancel the aio request, but at least */
3210 /* it quickly returns */
3211 if (CORO_THROW)
1094 return 0; 3212 return 0;
1095}
1096 3213
1097static void 3214 /* one element that is an RV? repeat! */
1098api_schedule (void) 3215 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
1099{
1100 struct transfer_args ta;
1101
1102 prepare_schedule (&ta);
1103 TRANSFER (ta);
1104}
1105
1106static int
1107api_cede (void)
1108{
1109 struct transfer_args ta;
1110
1111 prepare_cede (&ta);
1112
1113 if (ta.prev != ta.next)
1114 {
1115 TRANSFER (ta);
1116 return 1; 3216 return 1;
3217
3218 /* restore status */
3219 {
3220 SV *data_sv = av_pop (state);
3221 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3222
3223 errno = data->errorno;
3224 PL_laststype = data->laststype;
3225 PL_laststatval = data->laststatval;
3226 PL_statcache = data->statcache;
3227
3228 SvREFCNT_dec (data_sv);
1117 } 3229 }
1118 else 3230
3231 /* push result values */
3232 {
3233 dSP;
3234 int i;
3235
3236 EXTEND (SP, AvFILLp (state) + 1);
3237 for (i = 0; i <= AvFILLp (state); ++i)
3238 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3239
3240 PUTBACK;
3241 }
3242
1119 return 0; 3243 return 0;
1120} 3244}
1121 3245
1122static int 3246static void
1123api_cede_notself (void) 3247slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1124{ 3248{
1125 struct transfer_args ta; 3249 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3250 SV *coro_hv = SvRV (coro_current);
3251 struct coro *coro = SvSTATE_hv (coro_hv);
1126 3252
1127 if (prepare_cede_notself (&ta)) 3253 /* put our coroutine id on the state arg */
1128 { 3254 av_push (state, SvREFCNT_inc_NN (coro_hv));
1129 TRANSFER (ta); 3255
1130 return 1; 3256 /* first see whether we have a non-zero priority and set it as AIO prio */
3257 if (coro->prio)
1131 } 3258 {
1132 else 3259 dSP;
1133 return 0;
1134}
1135 3260
3261 static SV *prio_cv;
3262 static SV *prio_sv;
3263
3264 if (ecb_expect_false (!prio_cv))
3265 {
3266 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3267 prio_sv = newSViv (0);
3268 }
3269
3270 PUSHMARK (SP);
3271 sv_setiv (prio_sv, coro->prio);
3272 XPUSHs (prio_sv);
3273
3274 PUTBACK;
3275 call_sv (prio_cv, G_VOID | G_DISCARD);
3276 }
3277
3278 /* now call the original request */
3279 {
3280 dSP;
3281 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3282 int i;
3283
3284 PUSHMARK (SP);
3285
3286 /* first push all args to the stack */
3287 EXTEND (SP, items + 1);
3288
3289 for (i = 0; i < items; ++i)
3290 PUSHs (arg [i]);
3291
3292 /* now push the callback closure */
3293 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3294
3295 /* now call the AIO function - we assume our request is uncancelable */
3296 PUTBACK;
3297 call_sv ((SV *)req, G_VOID | G_DISCARD);
3298 }
3299
3300 /* now that the request is going, we loop till we have a result */
3301 frame->data = (void *)state;
3302 frame->prepare = prepare_schedule;
3303 frame->check = slf_check_aio_req;
3304}
3305
3306static void
3307coro_aio_req_xs (pTHX_ CV *cv)
3308{
3309 dXSARGS;
3310
3311 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3312
3313 XSRETURN_EMPTY;
3314}
3315
3316/*****************************************************************************/
3317
3318#if CORO_CLONE
3319# include "clone.c"
3320#endif
3321
3322/*****************************************************************************/
3323
3324static SV *
3325coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3326{
3327 SV *coro_sv;
3328 struct coro *coro;
3329 MAGIC *mg;
3330 HV *hv;
3331 SV *cb;
3332 int i;
3333
3334 if (argc > 0)
3335 {
3336 cb = s_get_cv_croak (argv [0]);
3337
3338 if (!is_coro)
3339 {
3340 if (CvISXSUB (cb))
3341 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3342
3343 if (!CvROOT (cb))
3344 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3345 }
3346 }
3347
3348 Newz (0, coro, 1, struct coro);
3349 coro->args = newAV ();
3350 coro->flags = CF_NEW;
3351
3352 if (coro_first) coro_first->prev = coro;
3353 coro->next = coro_first;
3354 coro_first = coro;
3355
3356 coro->hv = hv = newHV ();
3357 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3358 mg->mg_flags |= MGf_DUP;
3359 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3360
3361 if (argc > 0)
3362 {
3363 av_extend (coro->args, argc + is_coro - 1);
3364
3365 if (is_coro)
3366 {
3367 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3368 cb = (SV *)cv_coro_run;
3369 }
3370
3371 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3372
3373 for (i = 1; i < argc; i++)
3374 av_push (coro->args, newSVsv (argv [i]));
3375 }
3376
3377 return coro_sv;
3378}
3379
3380#ifndef __cplusplus
3381ecb_cold XS(boot_Coro__State);
3382#endif
3383
3384#if CORO_JIT
3385
3386static void ecb_noinline ecb_cold
3387pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3388{
3389 dSP;
3390 AV *av = newAV ();
3391
3392 av_store (av, 3, newSVuv (d));
3393 av_store (av, 2, newSVuv (c));
3394 av_store (av, 1, newSVuv (b));
3395 av_store (av, 0, newSVuv (a));
3396
3397 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3398
3399 PUTBACK;
3400}
3401
3402static void ecb_noinline ecb_cold
3403jit_init (pTHX)
3404{
3405 dSP;
3406 SV *load, *save;
3407 char *map_base;
3408 char *load_ptr, *save_ptr;
3409 STRLEN load_len, save_len, map_len;
3410 int count;
3411
3412 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3413
3414 PUSHMARK (SP);
3415 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3416 #include "state.h"
3417 count = call_pv ("Coro::State::_jit", G_ARRAY);
3418 SPAGAIN;
3419
3420 save = POPs; save_ptr = SvPVbyte (save, save_len);
3421 load = POPs; load_ptr = SvPVbyte (load, load_len);
3422
3423 map_len = load_len + save_len + 16;
3424
3425 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3426
3427 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3428
3429 load_perl_slots = (load_save_perl_slots_type)map_base;
3430 memcpy (map_base, load_ptr, load_len);
3431
3432 map_base += (load_len + 15) & ~15;
3433
3434 save_perl_slots = (load_save_perl_slots_type)map_base;
3435 memcpy (map_base, save_ptr, save_len);
3436
3437 /* we are good citizens and try to make the page read-only, so the evil evil */
3438 /* hackers might have it a bit more difficult */
3439 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3440
3441 PUTBACK;
3442 eval_pv ("undef &Coro::State::_jit", 1);
3443}
3444
3445#endif
3446
1136MODULE = Coro::State PACKAGE = Coro::State 3447MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1137 3448
1138PROTOTYPES: DISABLE 3449PROTOTYPES: DISABLE
1139 3450
1140BOOT: 3451BOOT:
1141{ 3452{
3453#define VARx(name,expr,type) if (sizeof (type) < sizeof (expr)) croak ("FATAL: Coro thread context slot '" # name "' too small for this version of perl.");
3454#include "state.h"
1142#ifdef USE_ITHREADS 3455#ifdef USE_ITHREADS
1143 MUTEX_INIT (&coro_mutex); 3456# if CORO_PTHREAD
3457 coro_thx = PERL_GET_CONTEXT;
1144#endif 3458# endif
1145 BOOT_PAGESIZE; 3459#endif
3460 /* perl defines these to check for existance first, but why it doesn't */
3461 /* just create them one at init time is not clear to me, except for */
3462 /* programs trying to delete them, but... */
3463 /* anyway, we declare this as invalid and make sure they are initialised here */
3464 DEFSV;
3465 ERRSV;
3466
3467 cctx_current = cctx_new_empty ();
3468
3469 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3470 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3471
3472 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3473 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3474 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3475
3476 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3477 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3478 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1146 3479
1147 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3480 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1148 3481
3482 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
3483 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1149 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 3484 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1150 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1151 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1152 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1153 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 3485 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1154 3486
1155 main_mainstack = PL_mainstack; 3487 main_mainstack = PL_mainstack;
3488 main_top_env = PL_top_env;
1156 3489
3490 while (main_top_env->je_prev)
3491 main_top_env = main_top_env->je_prev;
3492
3493 {
3494 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3495
3496 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3497 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3498
3499 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3500 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3501 }
3502
1157 coroapi.ver = CORO_API_VERSION; 3503 coroapi.ver = CORO_API_VERSION;
3504 coroapi.rev = CORO_API_REVISION;
3505
1158 coroapi.transfer = api_transfer; 3506 coroapi.transfer = api_transfer;
1159 3507
3508 coroapi.sv_state = SvSTATE_;
3509 coroapi.execute_slf = api_execute_slf;
3510 coroapi.prepare_nop = prepare_nop;
3511 coroapi.prepare_schedule = prepare_schedule;
3512 coroapi.prepare_cede = prepare_cede;
3513 coroapi.prepare_cede_notself = prepare_cede_notself;
3514
3515 time_init (aTHX);
3516
1160 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3517 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3518#if CORO_JIT
3519 PUTBACK;
3520 jit_init (aTHX);
3521 SPAGAIN;
3522#endif
1161} 3523}
1162 3524
1163SV * 3525SV *
1164new (char *klass, ...) 3526new (SV *klass, ...)
3527 ALIAS:
3528 Coro::new = 1
1165 CODE: 3529 CODE:
1166{ 3530 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1167 struct coro *coro;
1168 HV *hv;
1169 int i;
1170
1171 Newz (0, coro, 1, struct coro);
1172 coro->args = newAV ();
1173 coro->save = CORO_SAVE_ALL;
1174 coro->flags = CF_NEW;
1175
1176 hv = newHV ();
1177 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1178 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1179
1180 for (i = 1; i < items; i++)
1181 av_push (coro->args, newSVsv (ST (i)));
1182}
1183 OUTPUT:
1184 RETVAL
1185
1186int
1187save (SV *coro, int new_save = -1)
1188 CODE:
1189 RETVAL = api_save (coro, new_save);
1190 OUTPUT: 3531 OUTPUT:
1191 RETVAL 3532 RETVAL
1192 3533
1193void 3534void
1194_set_stacklevel (...) 3535transfer (...)
1195 ALIAS: 3536 PROTOTYPE: $$
1196 Coro::State::transfer = 1
1197 Coro::schedule = 2
1198 Coro::cede = 3
1199 Coro::cede_notself = 4
1200 CODE:
1201{
1202 struct transfer_args ta;
1203
1204 switch (ix)
1205 {
1206 case 0:
1207 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1208 ta.next = 0;
1209 break;
1210
1211 case 1:
1212 if (items != 2)
1213 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1214
1215 prepare_transfer (&ta, ST (0), ST (1));
1216 break;
1217
1218 case 2:
1219 prepare_schedule (&ta);
1220 break;
1221
1222 case 3:
1223 prepare_cede (&ta);
1224 break;
1225
1226 case 4:
1227 if (!prepare_cede_notself (&ta))
1228 XSRETURN_EMPTY;
1229
1230 break;
1231 }
1232
1233 BARRIER;
1234 TRANSFER (ta);
1235
1236 if (GIMME_V != G_VOID && ta.next != ta.prev)
1237 XSRETURN_YES;
1238}
1239
1240bool
1241_destroy (SV *coro_sv)
1242 CODE: 3537 CODE:
1243 RETVAL = coro_state_destroy (SvSTATE (coro_sv)); 3538 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3539
3540SV *
3541clone (Coro::State coro)
3542 CODE:
3543{
3544#if CORO_CLONE
3545 struct coro *ncoro = coro_clone (aTHX_ coro);
3546 MAGIC *mg;
3547 /* TODO: too much duplication */
3548 ncoro->hv = newHV ();
3549 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3550 mg->mg_flags |= MGf_DUP;
3551 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3552#else
3553 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3554#endif
3555}
1244 OUTPUT: 3556 OUTPUT:
1245 RETVAL 3557 RETVAL
1246 3558
1247void 3559int
1248_exit (code) 3560cctx_stacksize (int new_stacksize = 0)
1249 int code 3561 PROTOTYPE: ;$
1250 PROTOTYPE: $
1251 CODE: 3562 CODE:
1252 _exit (code); 3563 RETVAL = cctx_stacksize;
3564 if (new_stacksize)
3565 {
3566 cctx_stacksize = new_stacksize;
3567 ++cctx_gen;
3568 }
3569 OUTPUT:
3570 RETVAL
3571
3572int
3573cctx_max_idle (int max_idle = 0)
3574 PROTOTYPE: ;$
3575 CODE:
3576 RETVAL = cctx_max_idle;
3577 if (max_idle > 1)
3578 cctx_max_idle = max_idle;
3579 OUTPUT:
3580 RETVAL
1253 3581
1254int 3582int
1255cctx_count () 3583cctx_count ()
3584 PROTOTYPE:
1256 CODE: 3585 CODE:
1257 RETVAL = cctx_count; 3586 RETVAL = cctx_count;
1258 OUTPUT: 3587 OUTPUT:
1259 RETVAL 3588 RETVAL
1260 3589
1261int 3590int
1262cctx_idle () 3591cctx_idle ()
3592 PROTOTYPE:
1263 CODE: 3593 CODE:
1264 RETVAL = cctx_idle; 3594 RETVAL = cctx_idle;
1265 OUTPUT: 3595 OUTPUT:
1266 RETVAL 3596 RETVAL
1267 3597
3598void
3599list ()
3600 PROTOTYPE:
3601 PPCODE:
3602{
3603 struct coro *coro;
3604 for (coro = coro_first; coro; coro = coro->next)
3605 if (coro->hv)
3606 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3607}
3608
3609void
3610call (Coro::State coro, SV *coderef)
3611 ALIAS:
3612 eval = 1
3613 CODE:
3614{
3615 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3616 {
3617 struct coro *current = SvSTATE_current;
3618 struct CoroSLF slf_save;
3619
3620 if (current != coro)
3621 {
3622 PUTBACK;
3623 save_perl (aTHX_ current);
3624 load_perl (aTHX_ coro);
3625 /* the coro is most likely in an active SLF call.
3626 * while not strictly required (the code we execute is
3627 * not allowed to call any SLF functions), it's cleaner
3628 * to reinitialise the slf_frame and restore it later.
3629 * This might one day allow us to actually do SLF calls
3630 * from code executed here.
3631 */
3632 slf_save = slf_frame;
3633 slf_frame.prepare = 0;
3634 SPAGAIN;
3635 }
3636
3637 PUSHSTACK;
3638
3639 PUSHMARK (SP);
3640 PUTBACK;
3641
3642 if (ix)
3643 eval_sv (coderef, 0);
3644 else
3645 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3646
3647 POPSTACK;
3648 SPAGAIN;
3649
3650 if (current != coro)
3651 {
3652 PUTBACK;
3653 slf_frame = slf_save;
3654 save_perl (aTHX_ coro);
3655 load_perl (aTHX_ current);
3656 SPAGAIN;
3657 }
3658 }
3659}
3660
3661SV *
3662is_ready (Coro::State coro)
3663 PROTOTYPE: $
3664 ALIAS:
3665 is_ready = CF_READY
3666 is_running = CF_RUNNING
3667 is_new = CF_NEW
3668 is_destroyed = CF_ZOMBIE
3669 is_zombie = CF_ZOMBIE
3670 is_suspended = CF_SUSPENDED
3671 CODE:
3672 RETVAL = boolSV (coro->flags & ix);
3673 OUTPUT:
3674 RETVAL
3675
3676void
3677throw (SV *self, SV *exception = &PL_sv_undef)
3678 PROTOTYPE: $;$
3679 CODE:
3680{
3681 struct coro *coro = SvSTATE (self);
3682 struct coro *current = SvSTATE_current;
3683 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3684 SvREFCNT_dec (*exceptionp);
3685 SvGETMAGIC (exception);
3686 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3687
3688 api_ready (aTHX_ self);
3689}
3690
3691void
3692api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3693 PROTOTYPE: $;$
3694 C_ARGS: aTHX_ coro, flags
3695
3696SV *
3697has_cctx (Coro::State coro)
3698 PROTOTYPE: $
3699 CODE:
3700 /* maybe manage the running flag differently */
3701 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3702 OUTPUT:
3703 RETVAL
3704
3705int
3706is_traced (Coro::State coro)
3707 PROTOTYPE: $
3708 CODE:
3709 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3710 OUTPUT:
3711 RETVAL
3712
3713UV
3714rss (Coro::State coro)
3715 PROTOTYPE: $
3716 ALIAS:
3717 usecount = 1
3718 CODE:
3719 switch (ix)
3720 {
3721 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3722 case 1: RETVAL = coro->usecount; break;
3723 }
3724 OUTPUT:
3725 RETVAL
3726
3727void
3728force_cctx ()
3729 PROTOTYPE:
3730 CODE:
3731 cctx_current->idle_sp = 0;
3732
3733void
3734swap_defsv (Coro::State self)
3735 PROTOTYPE: $
3736 ALIAS:
3737 swap_defav = 1
3738 CODE:
3739 if (!self->slot)
3740 croak ("cannot swap state with coroutine that has no saved state,");
3741 else
3742 {
3743 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3744 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3745
3746 SV *tmp = *src; *src = *dst; *dst = tmp;
3747 }
3748
3749void
3750cancel (Coro::State self)
3751 CODE:
3752 coro_state_destroy (aTHX_ self);
3753
3754SV *
3755enable_times (int enabled = enable_times)
3756 CODE:
3757{
3758 RETVAL = boolSV (enable_times);
3759
3760 if (enabled != enable_times)
3761 {
3762 enable_times = enabled;
3763
3764 coro_times_update ();
3765 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3766 }
3767}
3768 OUTPUT:
3769 RETVAL
3770
3771void
3772times (Coro::State self)
3773 PPCODE:
3774{
3775 struct coro *current = SvSTATE (coro_current);
3776
3777 if (ecb_expect_false (current == self))
3778 {
3779 coro_times_update ();
3780 coro_times_add (SvSTATE (coro_current));
3781 }
3782
3783 EXTEND (SP, 2);
3784 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3785 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3786
3787 if (ecb_expect_false (current == self))
3788 coro_times_sub (SvSTATE (coro_current));
3789}
3790
3791void
3792swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3793 CODE:
3794{
3795 struct coro *current = SvSTATE_current;
3796
3797 if (current == coro)
3798 SWAP_SVS (current);
3799
3800 if (!coro->swap_sv)
3801 coro->swap_sv = newAV ();
3802
3803 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3804 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3805
3806 if (current == coro)
3807 SWAP_SVS (current);
3808}
3809
3810
1268MODULE = Coro::State PACKAGE = Coro 3811MODULE = Coro::State PACKAGE = Coro
1269 3812
1270BOOT: 3813BOOT:
1271{ 3814{
1272 int i; 3815 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3816 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3817 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3818 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3819 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3820 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3821 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3822 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1273 3823
3824 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3825 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3826 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3827 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3828
1274 coro_stash = gv_stashpv ("Coro", TRUE); 3829 coro_stash = gv_stashpv ("Coro", TRUE);
1275 3830
1276 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3831 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1277 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3832 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1278 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3833 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1279 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3834 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1280 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3835 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1281 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3836 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1282
1283 coro_current = get_sv ("Coro::current", FALSE);
1284 SvREADONLY_on (coro_current);
1285
1286 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1287 coro_ready[i] = newAV ();
1288 3837
1289 { 3838 {
1290 SV *sv = perl_get_sv("Coro::API", 1); 3839 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1291 3840
1292 coroapi.schedule = api_schedule; 3841 coroapi.schedule = api_schedule;
1293 coroapi.save = api_save; 3842 coroapi.schedule_to = api_schedule_to;
1294 coroapi.cede = api_cede; 3843 coroapi.cede = api_cede;
1295 coroapi.cede_notself = api_cede_notself; 3844 coroapi.cede_notself = api_cede_notself;
1296 coroapi.ready = api_ready; 3845 coroapi.ready = api_ready;
1297 coroapi.is_ready = api_is_ready; 3846 coroapi.is_ready = api_is_ready;
1298 coroapi.nready = &coro_nready; 3847 coroapi.nready = coro_nready;
1299 coroapi.current = coro_current; 3848 coroapi.current = coro_current;
1300 3849
1301 GCoroAPI = &coroapi; 3850 /*GCoroAPI = &coroapi;*/
1302 sv_setiv (sv, (IV)&coroapi); 3851 sv_setiv (sv, (IV)&coroapi);
1303 SvREADONLY_on (sv); 3852 SvREADONLY_on (sv);
1304 } 3853 }
1305} 3854}
3855
3856SV *
3857async (...)
3858 PROTOTYPE: &@
3859 CODE:
3860 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3861 api_ready (aTHX_ RETVAL);
3862 OUTPUT:
3863 RETVAL
3864
3865void
3866_destroy (Coro::State coro)
3867 CODE:
3868 /* used by the manager thread */
3869 coro_state_destroy (aTHX_ coro);
3870
3871void
3872on_destroy (Coro::State coro, SV *cb)
3873 CODE:
3874 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3875
3876void
3877join (...)
3878 CODE:
3879 CORO_EXECUTE_SLF_XS (slf_init_join);
3880
3881void
3882terminate (...)
3883 CODE:
3884 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3885
3886void
3887cancel (...)
3888 CODE:
3889 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3890
3891int
3892safe_cancel (Coro::State self, ...)
3893 C_ARGS: aTHX_ self, &ST (1), items - 1
3894
3895void
3896schedule (...)
3897 CODE:
3898 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3899
3900void
3901schedule_to (...)
3902 CODE:
3903 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3904
3905void
3906cede_to (...)
3907 CODE:
3908 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3909
3910void
3911cede (...)
3912 CODE:
3913 CORO_EXECUTE_SLF_XS (slf_init_cede);
3914
3915void
3916cede_notself (...)
3917 CODE:
3918 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1306 3919
1307void 3920void
1308_set_current (SV *current) 3921_set_current (SV *current)
1309 PROTOTYPE: $ 3922 PROTOTYPE: $
1310 CODE: 3923 CODE:
1311 SvREFCNT_dec (SvRV (coro_current)); 3924 SvREFCNT_dec (SvRV (coro_current));
1312 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3925 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3926
3927void
3928_set_readyhook (SV *hook)
3929 PROTOTYPE: $
3930 CODE:
3931 SvREFCNT_dec (coro_readyhook);
3932 SvGETMAGIC (hook);
3933 if (SvOK (hook))
3934 {
3935 coro_readyhook = newSVsv (hook);
3936 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3937 }
3938 else
3939 {
3940 coro_readyhook = 0;
3941 CORO_READYHOOK = 0;
3942 }
1313 3943
1314int 3944int
1315prio (Coro::State coro, int newprio = 0) 3945prio (Coro::State coro, int newprio = 0)
3946 PROTOTYPE: $;$
1316 ALIAS: 3947 ALIAS:
1317 nice = 1 3948 nice = 1
1318 CODE: 3949 CODE:
1319{ 3950{
1320 RETVAL = coro->prio; 3951 RETVAL = coro->prio;
… …
1322 if (items > 1) 3953 if (items > 1)
1323 { 3954 {
1324 if (ix) 3955 if (ix)
1325 newprio = coro->prio - newprio; 3956 newprio = coro->prio - newprio;
1326 3957
1327 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3958 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1328 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3959 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1329 3960
1330 coro->prio = newprio; 3961 coro->prio = newprio;
1331 } 3962 }
1332} 3963}
1333 OUTPUT: 3964 OUTPUT:
… …
1335 3966
1336SV * 3967SV *
1337ready (SV *self) 3968ready (SV *self)
1338 PROTOTYPE: $ 3969 PROTOTYPE: $
1339 CODE: 3970 CODE:
1340 RETVAL = boolSV (api_ready (self)); 3971 RETVAL = boolSV (api_ready (aTHX_ self));
1341 OUTPUT:
1342 RETVAL
1343
1344SV *
1345is_ready (SV *self)
1346 PROTOTYPE: $
1347 CODE:
1348 RETVAL = boolSV (api_is_ready (self));
1349 OUTPUT: 3972 OUTPUT:
1350 RETVAL 3973 RETVAL
1351 3974
1352int 3975int
1353nready (...) 3976nready (...)
… …
1355 CODE: 3978 CODE:
1356 RETVAL = coro_nready; 3979 RETVAL = coro_nready;
1357 OUTPUT: 3980 OUTPUT:
1358 RETVAL 3981 RETVAL
1359 3982
1360MODULE = Coro::State PACKAGE = Coro::AIO 3983void
3984suspend (Coro::State self)
3985 PROTOTYPE: $
3986 CODE:
3987 self->flags |= CF_SUSPENDED;
3988
3989void
3990resume (Coro::State self)
3991 PROTOTYPE: $
3992 CODE:
3993 self->flags &= ~CF_SUSPENDED;
3994
3995void
3996_pool_handler (...)
3997 CODE:
3998 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3999
4000void
4001async_pool (SV *cv, ...)
4002 PROTOTYPE: &@
4003 PPCODE:
4004{
4005 HV *hv = (HV *)av_pop (av_async_pool);
4006 AV *av = newAV ();
4007 SV *cb = ST (0);
4008 int i;
4009
4010 av_extend (av, items - 2);
4011 for (i = 1; i < items; ++i)
4012 av_push (av, SvREFCNT_inc_NN (ST (i)));
4013
4014 if ((SV *)hv == &PL_sv_undef)
4015 {
4016 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
4017 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
4018 SvREFCNT_dec (sv);
4019 }
4020
4021 {
4022 struct coro *coro = SvSTATE_hv (hv);
4023
4024 assert (!coro->invoke_cb);
4025 assert (!coro->invoke_av);
4026 coro->invoke_cb = SvREFCNT_inc (cb);
4027 coro->invoke_av = av;
4028 }
4029
4030 api_ready (aTHX_ (SV *)hv);
4031
4032 if (GIMME_V != G_VOID)
4033 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4034 else
4035 SvREFCNT_dec (hv);
4036}
1361 4037
1362SV * 4038SV *
1363_get_state () 4039rouse_cb ()
4040 PROTOTYPE:
1364 CODE: 4041 CODE:
1365{ 4042 RETVAL = coro_new_rouse_cb (aTHX);
1366 struct io_state *data;
1367
1368 RETVAL = newSV (sizeof (struct io_state));
1369 data = (struct io_state *)SvPVX (RETVAL);
1370 SvCUR_set (RETVAL, sizeof (struct io_state));
1371 SvPOK_only (RETVAL);
1372
1373 data->errorno = errno;
1374 data->laststype = PL_laststype;
1375 data->laststatval = PL_laststatval;
1376 data->statcache = PL_statcache;
1377}
1378 OUTPUT: 4043 OUTPUT:
1379 RETVAL 4044 RETVAL
1380 4045
1381void 4046void
1382_set_state (char *data_) 4047rouse_wait (...)
4048 PROTOTYPE: ;$
4049 PPCODE:
4050 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4051
4052void
4053on_enter (SV *block)
4054 ALIAS:
4055 on_leave = 1
1383 PROTOTYPE: $ 4056 PROTOTYPE: &
1384 CODE: 4057 CODE:
1385{ 4058{
1386 struct io_state *data = (void *)data_; 4059 struct coro *coro = SvSTATE_current;
4060 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1387 4061
1388 errno = data->errorno; 4062 block = s_get_cv_croak (block);
1389 PL_laststype = data->laststype;
1390 PL_laststatval = data->laststatval;
1391 PL_statcache = data->statcache;
1392}
1393 4063
4064 if (!*avp)
4065 *avp = newAV ();
4066
4067 av_push (*avp, SvREFCNT_inc (block));
4068
4069 if (!ix)
4070 on_enterleave_call (aTHX_ block);
4071
4072 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4073 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4074 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4075}
4076
4077
4078MODULE = Coro::State PACKAGE = PerlIO::cede
4079
4080BOOT:
4081 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4082
4083
4084MODULE = Coro::State PACKAGE = Coro::Semaphore
4085
4086SV *
4087new (SV *klass, SV *count = 0)
4088 CODE:
4089{
4090 int semcnt = 1;
4091
4092 if (count)
4093 {
4094 SvGETMAGIC (count);
4095
4096 if (SvOK (count))
4097 semcnt = SvIV (count);
4098 }
4099
4100 RETVAL = sv_bless (
4101 coro_waitarray_new (aTHX_ semcnt),
4102 GvSTASH (CvGV (cv))
4103 );
4104}
4105 OUTPUT:
4106 RETVAL
4107
4108# helper for Coro::Channel and others
4109SV *
4110_alloc (int count)
4111 CODE:
4112 RETVAL = coro_waitarray_new (aTHX_ count);
4113 OUTPUT:
4114 RETVAL
4115
4116SV *
4117count (SV *self)
4118 CODE:
4119 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4120 OUTPUT:
4121 RETVAL
4122
4123void
4124up (SV *self, int adjust = 1)
4125 ALIAS:
4126 adjust = 1
4127 CODE:
4128 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4129
4130void
4131down (...)
4132 CODE:
4133 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4134
4135void
4136wait (...)
4137 CODE:
4138 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4139
4140void
4141try (SV *self)
4142 PPCODE:
4143{
4144 AV *av = (AV *)SvRV (self);
4145 SV *count_sv = AvARRAY (av)[0];
4146 IV count = SvIVX (count_sv);
4147
4148 if (count > 0)
4149 {
4150 --count;
4151 SvIVX (count_sv) = count;
4152 XSRETURN_YES;
4153 }
4154 else
4155 XSRETURN_NO;
4156}
4157
4158void
4159waiters (SV *self)
4160 PPCODE:
4161{
4162 AV *av = (AV *)SvRV (self);
4163 int wcount = AvFILLp (av) + 1 - 1;
4164
4165 if (GIMME_V == G_SCALAR)
4166 XPUSHs (sv_2mortal (newSViv (wcount)));
4167 else
4168 {
4169 int i;
4170 EXTEND (SP, wcount);
4171 for (i = 1; i <= wcount; ++i)
4172 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4173 }
4174}
4175
4176MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4177
4178void
4179_may_delete (SV *sem, int count, unsigned int extra_refs)
4180 PPCODE:
4181{
4182 AV *av = (AV *)SvRV (sem);
4183
4184 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4185 && AvFILLp (av) == 0 /* no waiters, just count */
4186 && SvIV (AvARRAY (av)[0]) == count)
4187 XSRETURN_YES;
4188
4189 XSRETURN_NO;
4190}
4191
4192MODULE = Coro::State PACKAGE = Coro::Signal
4193
4194SV *
4195new (SV *klass)
4196 CODE:
4197 RETVAL = sv_bless (
4198 coro_waitarray_new (aTHX_ 0),
4199 GvSTASH (CvGV (cv))
4200 );
4201 OUTPUT:
4202 RETVAL
4203
4204void
4205wait (...)
4206 CODE:
4207 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4208
4209void
4210broadcast (SV *self)
4211 CODE:
4212{
4213 AV *av = (AV *)SvRV (self);
4214 coro_signal_wake (aTHX_ av, AvFILLp (av));
4215}
4216
4217void
4218send (SV *self)
4219 CODE:
4220{
4221 AV *av = (AV *)SvRV (self);
4222
4223 if (AvFILLp (av))
4224 coro_signal_wake (aTHX_ av, 1);
4225 else
4226 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4227}
4228
4229IV
4230awaited (SV *self)
4231 CODE:
4232 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4233 OUTPUT:
4234 RETVAL
4235
4236
4237MODULE = Coro::State PACKAGE = Coro::AnyEvent
4238
4239BOOT:
4240 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4241
4242void
4243_schedule (...)
4244 CODE:
4245{
4246 static int incede;
4247
4248 api_cede_notself (aTHX);
4249
4250 ++incede;
4251 while (coro_nready >= incede && api_cede (aTHX))
4252 ;
4253
4254 sv_setsv (sv_activity, &PL_sv_undef);
4255 if (coro_nready >= incede)
4256 {
4257 PUSHMARK (SP);
4258 PUTBACK;
4259 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4260 }
4261
4262 --incede;
4263}
4264
4265
4266MODULE = Coro::State PACKAGE = Coro::AIO
4267
4268void
4269_register (char *target, char *proto, SV *req)
4270 CODE:
4271{
4272 SV *req_cv = s_get_cv_croak (req);
4273 /* newXSproto doesn't return the CV on 5.8 */
4274 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4275 sv_setpv ((SV *)slf_cv, proto);
4276 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4277}
4278
4279MODULE = Coro::State PACKAGE = Coro::Select
4280
4281void
4282patch_pp_sselect ()
4283 CODE:
4284 if (!coro_old_pp_sselect)
4285 {
4286 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4287 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4288 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4289 }
4290
4291void
4292unpatch_pp_sselect ()
4293 CODE:
4294 if (coro_old_pp_sselect)
4295 {
4296 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4297 coro_old_pp_sselect = 0;
4298 }
4299
4300MODULE = Coro::State PACKAGE = Coro::Util
4301
4302void
4303_exit (int code)
4304 CODE:
4305 _exit (code);
4306
4307NV
4308time ()
4309 CODE:
4310 RETVAL = nvtime (aTHX);
4311 OUTPUT:
4312 RETVAL
4313
4314NV
4315gettimeofday ()
4316 PPCODE:
4317{
4318 UV tv [2];
4319 u2time (aTHX_ tv);
4320 EXTEND (SP, 2);
4321 PUSHs (sv_2mortal (newSVuv (tv [0])));
4322 PUSHs (sv_2mortal (newSVuv (tv [1])));
4323}
4324

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