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Comparing Coro/Coro/State.xs (file contents):
Revision 1.61 by root, Tue Aug 10 01:56:30 2004 UTC vs.
Revision 1.318 by root, Thu Nov 20 07:02:43 2008 UTC

1#include "libcoro/coro.c"
2
1#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
2 5
3#include "EXTERN.h" 6#include "EXTERN.h"
4#include "perl.h" 7#include "perl.h"
5#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
6 10
7#include "patchlevel.h" 11#include "patchlevel.h"
8 12
9#if PATCHLEVEL < 6 13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp /* deep magic */
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
25
26#ifdef HAVE_MMAP
27# include <unistd.h>
28# include <sys/mman.h>
29# ifndef MAP_ANONYMOUS
30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
32# else
33# undef HAVE_MMAP
34# endif
35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
48
49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
55
56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
10# ifndef PL_ppaddr 63# ifndef PL_ppaddr
11# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
12# endif 65# endif
13# ifndef call_sv 66# ifndef call_sv
14# define call_sv perl_call_sv 67# define call_sv perl_call_sv
… …
25# ifndef IS_PADCONST 78# ifndef IS_PADCONST
26# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
27# endif 80# endif
28#endif 81#endif
29 82
30#include "libcoro/coro.c" 83/* 5.11 */
31 84#ifndef CxHASARGS
32#include <signal.h> 85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
33
34#ifdef HAVE_MMAP
35# include <unistd.h>
36# include <sys/mman.h>
37# ifndef MAP_ANONYMOUS
38# ifdef MAP_ANON
39# define MAP_ANONYMOUS MAP_ANON
40# else
41# undef HAVE_MMAP
42# endif 86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103#ifndef CvISXSUB
104# define CvISXSUB(cv) (CvXSUB (cv) ? TRUE : FALSE)
105#endif
106
107/* 5.8.7 */
108#ifndef SvRV_set
109# define SvRV_set(s,v) SvRV(s) = (v)
110#endif
111
112#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
113# undef CORO_STACKGUARD
114#endif
115
116#ifndef CORO_STACKGUARD
117# define CORO_STACKGUARD 0
118#endif
119
120/* prefer perl internal functions over our own? */
121#ifndef CORO_PREFER_PERL_FUNCTIONS
122# define CORO_PREFER_PERL_FUNCTIONS 0
123#endif
124
125/* The next macros try to return the current stack pointer, in an as
126 * portable way as possible. */
127#if __GNUC__ >= 4
128# define dSTACKLEVEL int stacklevel_dummy
129# define STACKLEVEL __builtin_frame_address (0)
130#else
131# define dSTACKLEVEL volatile void *stacklevel
132# define STACKLEVEL ((void *)&stacklevel)
133#endif
134
135#define IN_DESTRUCT (PL_main_cv == Nullcv)
136
137#if __GNUC__ >= 3
138# define attribute(x) __attribute__(x)
139# define expect(expr,value) __builtin_expect ((expr),(value))
140# define INLINE static inline
141#else
142# define attribute(x)
143# define expect(expr,value) (expr)
144# define INLINE static
145#endif
146
147#define expect_false(expr) expect ((expr) != 0, 0)
148#define expect_true(expr) expect ((expr) != 0, 1)
149
150#define NOINLINE attribute ((noinline))
151
152#include "CoroAPI.h"
153#define GCoroAPI (&coroapi) /* very sneaky */
154
155#ifdef USE_ITHREADS
156# if CORO_PTHREAD
157static void *coro_thx;
43# endif 158# endif
44#endif 159#endif
45 160
46#define SUB_INIT "Coro::State::initialize" 161static double (*nvtime)(); /* so why doesn't it take void? */
47#define UCORO_STATE "_coro_state"
48 162
49/* The next macro should declare a variable stacklevel that contains and approximation 163/* we hijack an hopefully unused CV flag for our purposes */
50 * to the current C stack pointer. Its property is that it changes with each call 164#define CVf_SLF 0x4000
51 * and should be unique. */ 165static OP *pp_slf (pTHX);
52#define dSTACKLEVEL void *stacklevel = &stacklevel
53 166
54#define IN_DESTRUCT (PL_main_cv == Nullcv) 167static U32 cctx_gen;
55 168static size_t cctx_stacksize = CORO_STACKSIZE;
56#define labs(l) ((l) >= 0 ? (l) : -(l))
57
58#include "CoroAPI.h"
59
60#ifdef USE_ITHREADS
61static perl_mutex coro_mutex;
62# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64#else
65# define LOCK 0
66# define UNLOCK 0
67#endif
68
69static struct CoroAPI coroapi; 169static struct CoroAPI coroapi;
70static AV *main_mainstack; /* used to differentiate between $main and others */ 170static AV *main_mainstack; /* used to differentiate between $main and others */
171static JMPENV *main_top_env;
71static HV *coro_state_stash; 172static HV *coro_state_stash, *coro_stash;
72static SV *ucoro_state_sv;
73static U32 ucoro_state_hash;
74static SV *coro_mortal; /* will be freed after next transfer */ 173static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
75 174
76/* this is actually not only the c stack but also c registers etc... */ 175static AV *av_destroy; /* destruction queue */
176static SV *sv_manager; /* the manager coro */
177
178static GV *irsgv; /* $/ */
179static GV *stdoutgv; /* *STDOUT */
180static SV *rv_diehook;
181static SV *rv_warnhook;
182static HV *hv_sig; /* %SIG */
183
184/* async_pool helper stuff */
185static SV *sv_pool_rss;
186static SV *sv_pool_size;
187static SV *sv_async_pool_idle; /* description string */
188static AV *av_async_pool; /* idle pool */
189static SV *sv_Coro; /* class string */
190static CV *cv_pool_handler;
191static CV *cv_coro_state_new;
192
193/* Coro::AnyEvent */
194static SV *sv_activity;
195
196static struct coro_cctx *cctx_first;
197static int cctx_count, cctx_idle;
198
199enum {
200 CC_MAPPED = 0x01,
201 CC_NOREUSE = 0x02, /* throw this away after tracing */
202 CC_TRACE = 0x04,
203 CC_TRACE_SUB = 0x08, /* trace sub calls */
204 CC_TRACE_LINE = 0x10, /* trace each statement */
205 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
206};
207
208/* this is a structure representing a c-level coroutine */
77typedef struct { 209typedef struct coro_cctx
78 int refcnt; /* pointer reference counter */ 210{
79 int usecnt; /* shared by how many coroutines */ 211 struct coro_cctx *next;
80 int gencnt; /* generation counter */
81 212
213 /* the stack */
214 void *sptr;
215 size_t ssize;
216
217 /* cpu state */
218 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
219 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
220 JMPENV *top_env;
82 coro_context cctx; 221 coro_context cctx;
83 222
84 void *sptr; 223 U32 gen;
85 long ssize; /* positive == mmap, otherwise malloc */ 224#if CORO_USE_VALGRIND
86} coro_stack; 225 int valgrind_id;
226#endif
227 unsigned char flags;
228} coro_cctx;
87 229
230enum {
231 CF_RUNNING = 0x0001, /* coroutine is running */
232 CF_READY = 0x0002, /* coroutine is ready */
233 CF_NEW = 0x0004, /* has never been switched to */
234 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
235};
236
237/* the structure where most of the perl state is stored, overlaid on the cxstack */
238typedef struct
239{
240 SV *defsv;
241 AV *defav;
242 SV *errsv;
243 SV *irsgv;
244#define VAR(name,type) type name;
245# include "state.h"
246#undef VAR
247} perl_slots;
248
249#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
250
251/* this is a structure representing a perl-level coroutine */
88struct coro { 252struct coro {
89 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 253 /* the C coroutine allocated to this perl coroutine, if any */
90 JMPENV start_env; 254 coro_cctx *cctx;
91 255
92 /* the optional C context */ 256 /* state data */
93 coro_stack *stack; 257 struct CoroSLF slf_frame; /* saved slf frame */
94 void *cursp;
95 int gencnt;
96
97 /* optionally saved, might be zero */
98 AV *defav;
99 SV *defsv;
100 SV *errsv;
101
102 /* saved global state not related to stacks */
103 U8 dowarn;
104 I32 in_eval;
105
106 /* the stacks and related info (callchain etc..) */
107 PERL_SI *curstackinfo;
108 AV *curstack;
109 AV *mainstack; 258 AV *mainstack;
110 SV **stack_sp; 259 perl_slots *slot; /* basically the saved sp */
111 OP *op;
112 SV **curpad;
113 AV *comppad;
114 SV **stack_base;
115 SV **stack_max;
116 SV **tmps_stack;
117 I32 tmps_floor;
118 I32 tmps_ix;
119 I32 tmps_max;
120 I32 *markstack;
121 I32 *markstack_ptr;
122 I32 *markstack_max;
123 I32 *scopestack;
124 I32 scopestack_ix;
125 I32 scopestack_max;
126 ANY *savestack;
127 I32 savestack_ix;
128 I32 savestack_max;
129 OP **retstack;
130 I32 retstack_ix;
131 I32 retstack_max;
132 COP *curcop;
133 JMPENV *top_env;
134 260
261 CV *startcv; /* the CV to execute */
135 /* data associated with this coroutine (initial args) */ 262 AV *args; /* data associated with this coroutine (initial args) */
136 AV *args; 263 int refcnt; /* coroutines are refcounted, yes */
264 int flags; /* CF_ flags */
265 HV *hv; /* the perl hash associated with this coro, if any */
266 void (*on_destroy)(pTHX_ struct coro *coro);
267
268 /* statistics */
269 int usecount; /* number of transfers to this coro */
270
271 /* coro process data */
272 int prio;
273 SV *except; /* exception to be thrown */
274 SV *rouse_cb;
275
276 /* async_pool */
277 SV *saved_deffh;
278 SV *invoke_cb;
279 AV *invoke_av;
280
281 /* linked list */
282 struct coro *next, *prev;
137}; 283};
138 284
139typedef struct coro *Coro__State; 285typedef struct coro *Coro__State;
140typedef struct coro *Coro__State_or_hashref; 286typedef struct coro *Coro__State_or_hashref;
141 287
142/* mostly copied from op.c:cv_clone2 */ 288/* the following variables are effectively part of the perl context */
143STATIC AV * 289/* and get copied between struct coro and these variables */
144clone_padlist (pTHX_ AV *protopadlist) 290/* the mainr easonw e don't support windows process emulation */
291static struct CoroSLF slf_frame; /* the current slf frame */
292
293/** Coro ********************************************************************/
294
295#define PRIO_MAX 3
296#define PRIO_HIGH 1
297#define PRIO_NORMAL 0
298#define PRIO_LOW -1
299#define PRIO_IDLE -3
300#define PRIO_MIN -4
301
302/* for Coro.pm */
303static SV *coro_current;
304static SV *coro_readyhook;
305static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
306static CV *cv_coro_run, *cv_coro_terminate;
307static struct coro *coro_first;
308#define coro_nready coroapi.nready
309
310/** lowlevel stuff **********************************************************/
311
312static SV *
313coro_get_sv (pTHX_ const char *name, int create)
145{ 314{
146 AV *av; 315#if PERL_VERSION_ATLEAST (5,10,0)
147 I32 ix; 316 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
148 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 317 get_sv (name, create);
149 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 318#endif
150 SV **pname = AvARRAY (protopad_name); 319 return get_sv (name, create);
151 SV **ppad = AvARRAY (protopad); 320}
152 I32 fname = AvFILLp (protopad_name); 321
153 I32 fpad = AvFILLp (protopad); 322static AV *
323coro_get_av (pTHX_ const char *name, int create)
324{
325#if PERL_VERSION_ATLEAST (5,10,0)
326 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
327 get_av (name, create);
328#endif
329 return get_av (name, create);
330}
331
332static HV *
333coro_get_hv (pTHX_ const char *name, int create)
334{
335#if PERL_VERSION_ATLEAST (5,10,0)
336 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
337 get_hv (name, create);
338#endif
339 return get_hv (name, create);
340}
341
342/* may croak */
343INLINE CV *
344coro_sv_2cv (pTHX_ SV *sv)
345{
346 HV *st;
347 GV *gvp;
348 return sv_2cv (sv, &st, &gvp, 0);
349}
350
351static AV *
352coro_clone_padlist (pTHX_ CV *cv)
353{
354 AV *padlist = CvPADLIST (cv);
154 AV *newpadlist, *newpad_name, *newpad; 355 AV *newpadlist, *newpad;
155 SV **npad;
156
157 newpad_name = newAV ();
158 for (ix = fname; ix >= 0; ix--)
159 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
160
161 newpad = newAV ();
162 av_fill (newpad, AvFILLp (protopad));
163 npad = AvARRAY (newpad);
164 356
165 newpadlist = newAV (); 357 newpadlist = newAV ();
166 AvREAL_off (newpadlist); 358 AvREAL_off (newpadlist);
167 av_store (newpadlist, 0, (SV *) newpad_name); 359#if PERL_VERSION_ATLEAST (5,10,0)
168 av_store (newpadlist, 1, (SV *) newpad); 360 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
169 361#else
170 av = newAV (); /* will be @_ */ 362 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
171 av_extend (av, 0);
172 av_store (newpad, 0, (SV *) av);
173 AvFLAGS (av) = AVf_REIFY;
174
175 for (ix = fpad; ix > 0; ix--)
176 {
177 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
178
179 if (namesv && namesv != &PL_sv_undef)
180 {
181 char *name = SvPVX (namesv); /* XXX */
182
183 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
184 { /* lexical from outside? */
185 npad[ix] = SvREFCNT_inc (ppad[ix]);
186 }
187 else
188 { /* our own lexical */
189 SV *sv;
190 if (*name == '&')
191 sv = SvREFCNT_inc (ppad[ix]);
192 else if (*name == '@')
193 sv = (SV *) newAV ();
194 else if (*name == '%')
195 sv = (SV *) newHV ();
196 else
197 sv = NEWSV (0, 0);
198
199#ifdef SvPADBUSY
200 if (!SvPADBUSY (sv))
201#endif 363#endif
202 SvPADMY_on (sv); 364 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
365 --AvFILLp (padlist);
203 366
204 npad[ix] = sv; 367 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
205 } 368 av_store (newpadlist, 1, (SV *)newpad);
206 }
207 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
208 {
209 npad[ix] = SvREFCNT_inc (ppad[ix]);
210 }
211 else
212 {
213 SV *sv = NEWSV (0, 0);
214 SvPADTMP_on (sv);
215 npad[ix] = sv;
216 }
217 }
218
219#if 0 /* return -ENOTUNDERSTOOD */
220 /* Now that vars are all in place, clone nested closures. */
221
222 for (ix = fpad; ix > 0; ix--) {
223 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
224 if (namesv
225 && namesv != &PL_sv_undef
226 && !(SvFLAGS(namesv) & SVf_FAKE)
227 && *SvPVX(namesv) == '&'
228 && CvCLONE(ppad[ix]))
229 {
230 CV *kid = cv_clone((CV*)ppad[ix]);
231 SvREFCNT_dec(ppad[ix]);
232 CvCLONE_on(kid);
233 SvPADMY_on(kid);
234 npad[ix] = (SV*)kid;
235 }
236 }
237#endif
238 369
239 return newpadlist; 370 return newpadlist;
240} 371}
241 372
242STATIC void 373static void
243free_padlist (pTHX_ AV *padlist) 374free_padlist (pTHX_ AV *padlist)
244{ 375{
245 /* may be during global destruction */ 376 /* may be during global destruction */
246 if (SvREFCNT (padlist)) 377 if (SvREFCNT (padlist))
247 { 378 {
… …
261 392
262 SvREFCNT_dec ((SV*)padlist); 393 SvREFCNT_dec ((SV*)padlist);
263 } 394 }
264} 395}
265 396
266STATIC int 397static int
267coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 398coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
268{ 399{
269 AV *padlist; 400 AV *padlist;
270 AV *av = (AV *)mg->mg_obj; 401 AV *av = (AV *)mg->mg_obj;
271 402
272 /* casting is fun. */ 403 /* casting is fun. */
273 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 404 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
274 free_padlist (aTHX_ padlist); 405 free_padlist (aTHX_ padlist);
275 406
276 SvREFCNT_dec (av); 407 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
277}
278 408
409 return 0;
410}
411
412#define CORO_MAGIC_type_cv 26
279#define PERL_MAGIC_coro PERL_MAGIC_ext 413#define CORO_MAGIC_type_state PERL_MAGIC_ext
280 414
281static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 415static MGVTBL coro_cv_vtbl = {
416 0, 0, 0, 0,
417 coro_cv_free
418};
419
420#define CORO_MAGIC_NN(sv, type) \
421 (expect_true (SvMAGIC (sv)->mg_type == type) \
422 ? SvMAGIC (sv) \
423 : mg_find (sv, type))
424
425#define CORO_MAGIC(sv, type) \
426 (expect_true (SvMAGIC (sv)) \
427 ? CORO_MAGIC_NN (sv, type) \
428 : 0)
429
430#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
431#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
432
433INLINE struct coro *
434SvSTATE_ (pTHX_ SV *coro)
435{
436 HV *stash;
437 MAGIC *mg;
438
439 if (SvROK (coro))
440 coro = SvRV (coro);
441
442 if (expect_false (SvTYPE (coro) != SVt_PVHV))
443 croak ("Coro::State object required");
444
445 stash = SvSTASH (coro);
446 if (expect_false (stash != coro_stash && stash != coro_state_stash))
447 {
448 /* very slow, but rare, check */
449 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
450 croak ("Coro::State object required");
451 }
452
453 mg = CORO_MAGIC_state (coro);
454 return (struct coro *)mg->mg_ptr;
455}
456
457#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
458
459/* faster than SvSTATE, but expects a coroutine hv */
460#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
461#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
282 462
283/* the next two functions merely cache the padlists */ 463/* the next two functions merely cache the padlists */
284STATIC void 464static void
285get_padlist (pTHX_ CV *cv) 465get_padlist (pTHX_ CV *cv)
286{ 466{
287 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 467 MAGIC *mg = CORO_MAGIC_cv (cv);
468 AV *av;
288 469
289 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 470 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
290 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 471 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
291 else 472 else
473 {
474#if CORO_PREFER_PERL_FUNCTIONS
475 /* this is probably cleaner? but also slower! */
476 /* in practise, it seems to be less stable */
477 CV *cp = Perl_cv_clone (aTHX_ cv);
478 CvPADLIST (cv) = CvPADLIST (cp);
479 CvPADLIST (cp) = 0;
480 SvREFCNT_dec (cp);
481#else
292 CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv)); 482 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
483#endif
484 }
293} 485}
294 486
295STATIC void 487static void
296put_padlist (pTHX_ CV *cv) 488put_padlist (pTHX_ CV *cv)
297{ 489{
298 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 490 MAGIC *mg = CORO_MAGIC_cv (cv);
491 AV *av;
299 492
300 if (!mg) 493 if (expect_false (!mg))
301 { 494 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
302 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
303 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
304 mg->mg_virtual = &vtbl_coro;
305 mg->mg_obj = (SV *)newAV ();
306 }
307 495
308 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 496 av = (AV *)mg->mg_obj;
309}
310 497
311#define SB do { 498 if (expect_false (AvFILLp (av) >= AvMAX (av)))
312#define SE } while (0) 499 av_extend (av, AvMAX (av) + 1);
313 500
314#define LOAD(state) load_state(aTHX_ (state)); 501 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
315#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 502}
316 503
317#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 504/** load & save, init *******************************************************/
318 505
319static void 506static void
320load_state(pTHX_ Coro__State c) 507load_perl (pTHX_ Coro__State c)
321{ 508{
322 PL_dowarn = c->dowarn; 509 perl_slots *slot = c->slot;
323 PL_in_eval = c->in_eval; 510 c->slot = 0;
324 511
325 PL_curstackinfo = c->curstackinfo;
326 PL_curstack = c->curstack;
327 PL_mainstack = c->mainstack; 512 PL_mainstack = c->mainstack;
328 PL_stack_sp = c->stack_sp;
329 PL_op = c->op;
330 PL_curpad = c->curpad;
331 PL_comppad = c->comppad;
332 PL_stack_base = c->stack_base;
333 PL_stack_max = c->stack_max;
334 PL_tmps_stack = c->tmps_stack;
335 PL_tmps_floor = c->tmps_floor;
336 PL_tmps_ix = c->tmps_ix;
337 PL_tmps_max = c->tmps_max;
338 PL_markstack = c->markstack;
339 PL_markstack_ptr = c->markstack_ptr;
340 PL_markstack_max = c->markstack_max;
341 PL_scopestack = c->scopestack;
342 PL_scopestack_ix = c->scopestack_ix;
343 PL_scopestack_max = c->scopestack_max;
344 PL_savestack = c->savestack;
345 PL_savestack_ix = c->savestack_ix;
346 PL_savestack_max = c->savestack_max;
347 PL_retstack = c->retstack;
348 PL_retstack_ix = c->retstack_ix;
349 PL_retstack_max = c->retstack_max;
350 PL_curcop = c->curcop;
351 PL_top_env = c->top_env;
352 513
353 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 514 GvSV (PL_defgv) = slot->defsv;
354 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 515 GvAV (PL_defgv) = slot->defav;
355 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 516 GvSV (PL_errgv) = slot->errsv;
517 GvSV (irsgv) = slot->irsgv;
518
519 #define VAR(name,type) PL_ ## name = slot->name;
520 # include "state.h"
521 #undef VAR
356 522
357 { 523 {
358 dSP; 524 dSP;
525
359 CV *cv; 526 CV *cv;
360 527
361 /* now do the ugly restore mess */ 528 /* now do the ugly restore mess */
362 while ((cv = (CV *)POPs)) 529 while (expect_true (cv = (CV *)POPs))
363 { 530 {
364 AV *padlist = (AV *)POPs;
365
366 if (padlist)
367 {
368 put_padlist (aTHX_ cv); /* mark this padlist as available */ 531 put_padlist (aTHX_ cv); /* mark this padlist as available */
369 CvPADLIST(cv) = padlist; 532 CvDEPTH (cv) = PTR2IV (POPs);
370 } 533 CvPADLIST (cv) = (AV *)POPs;
371
372 ++CvDEPTH(cv);
373 } 534 }
374 535
375 PUTBACK; 536 PUTBACK;
376 } 537 }
377}
378 538
539 slf_frame = c->slf_frame;
540 CORO_THROW = c->except;
541}
542
379static void 543static void
380save_state(pTHX_ Coro__State c, int flags) 544save_perl (pTHX_ Coro__State c)
381{ 545{
546 c->except = CORO_THROW;
547 c->slf_frame = slf_frame;
548
382 { 549 {
383 dSP; 550 dSP;
384 I32 cxix = cxstack_ix; 551 I32 cxix = cxstack_ix;
385 PERL_CONTEXT *ccstk = cxstack; 552 PERL_CONTEXT *ccstk = cxstack;
386 PERL_SI *top_si = PL_curstackinfo; 553 PERL_SI *top_si = PL_curstackinfo;
… …
388 /* 555 /*
389 * the worst thing you can imagine happens first - we have to save 556 * the worst thing you can imagine happens first - we have to save
390 * (and reinitialize) all cv's in the whole callchain :( 557 * (and reinitialize) all cv's in the whole callchain :(
391 */ 558 */
392 559
393 PUSHs (Nullsv); 560 XPUSHs (Nullsv);
394 /* this loop was inspired by pp_caller */ 561 /* this loop was inspired by pp_caller */
395 for (;;) 562 for (;;)
396 { 563 {
397 while (cxix >= 0) 564 while (expect_true (cxix >= 0))
398 { 565 {
399 PERL_CONTEXT *cx = &ccstk[cxix--]; 566 PERL_CONTEXT *cx = &ccstk[cxix--];
400 567
401 if (CxTYPE(cx) == CXt_SUB) 568 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
402 { 569 {
403 CV *cv = cx->blk_sub.cv; 570 CV *cv = cx->blk_sub.cv;
571
404 if (CvDEPTH(cv)) 572 if (expect_true (CvDEPTH (cv)))
405 { 573 {
406 EXTEND (SP, CvDEPTH(cv)*2); 574 EXTEND (SP, 3);
407
408 while (--CvDEPTH(cv))
409 {
410 /* this tells the restore code to increment CvDEPTH */
411 PUSHs (Nullsv);
412 PUSHs ((SV *)cv);
413 }
414
415 PUSHs ((SV *)CvPADLIST(cv)); 575 PUSHs ((SV *)CvPADLIST (cv));
576 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
416 PUSHs ((SV *)cv); 577 PUSHs ((SV *)cv);
417 578
579 CvDEPTH (cv) = 0;
418 get_padlist (aTHX_ cv); /* this is a monster */ 580 get_padlist (aTHX_ cv);
419 } 581 }
420 } 582 }
421#ifdef CXt_FORMAT
422 else if (CxTYPE(cx) == CXt_FORMAT)
423 {
424 /* I never used formats, so how should I know how these are implemented? */
425 /* my bold guess is as a simple, plain sub... */
426 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
427 }
428#endif
429 } 583 }
430 584
431 if (top_si->si_type == PERLSI_MAIN) 585 if (expect_true (top_si->si_type == PERLSI_MAIN))
432 break; 586 break;
433 587
434 top_si = top_si->si_prev; 588 top_si = top_si->si_prev;
435 ccstk = top_si->si_cxstack; 589 ccstk = top_si->si_cxstack;
436 cxix = top_si->si_cxix; 590 cxix = top_si->si_cxix;
437 } 591 }
438 592
439 PUTBACK; 593 PUTBACK;
440 } 594 }
441 595
442 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 596 /* allocate some space on the context stack for our purposes */
443 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 597 /* we manually unroll here, as usually 2 slots is enough */
444 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 598 if (SLOT_COUNT >= 1) CXINC;
599 if (SLOT_COUNT >= 2) CXINC;
600 if (SLOT_COUNT >= 3) CXINC;
601 {
602 int i;
603 for (i = 3; i < SLOT_COUNT; ++i)
604 CXINC;
605 }
606 cxstack_ix -= SLOT_COUNT; /* undo allocation */
445 607
446 c->dowarn = PL_dowarn;
447 c->in_eval = PL_in_eval;
448
449 c->curstackinfo = PL_curstackinfo;
450 c->curstack = PL_curstack;
451 c->mainstack = PL_mainstack; 608 c->mainstack = PL_mainstack;
452 c->stack_sp = PL_stack_sp; 609
453 c->op = PL_op; 610 {
454 c->curpad = PL_curpad; 611 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
455 c->comppad = PL_comppad; 612
456 c->stack_base = PL_stack_base; 613 slot->defav = GvAV (PL_defgv);
457 c->stack_max = PL_stack_max; 614 slot->defsv = DEFSV;
458 c->tmps_stack = PL_tmps_stack; 615 slot->errsv = ERRSV;
459 c->tmps_floor = PL_tmps_floor; 616 slot->irsgv = GvSV (irsgv);
460 c->tmps_ix = PL_tmps_ix; 617
461 c->tmps_max = PL_tmps_max; 618 #define VAR(name,type) slot->name = PL_ ## name;
462 c->markstack = PL_markstack; 619 # include "state.h"
463 c->markstack_ptr = PL_markstack_ptr; 620 #undef VAR
464 c->markstack_max = PL_markstack_max; 621 }
465 c->scopestack = PL_scopestack;
466 c->scopestack_ix = PL_scopestack_ix;
467 c->scopestack_max = PL_scopestack_max;
468 c->savestack = PL_savestack;
469 c->savestack_ix = PL_savestack_ix;
470 c->savestack_max = PL_savestack_max;
471 c->retstack = PL_retstack;
472 c->retstack_ix = PL_retstack_ix;
473 c->retstack_max = PL_retstack_max;
474 c->curcop = PL_curcop;
475 c->top_env = PL_top_env;
476} 622}
477 623
478/* 624/*
479 * allocate various perl stacks. This is an exact copy 625 * allocate various perl stacks. This is almost an exact copy
480 * of perl.c:init_stacks, except that it uses less memory 626 * of perl.c:init_stacks, except that it uses less memory
481 * on the (sometimes correct) assumption that coroutines do 627 * on the (sometimes correct) assumption that coroutines do
482 * not usually need a lot of stackspace. 628 * not usually need a lot of stackspace.
483 */ 629 */
484STATIC void 630#if CORO_PREFER_PERL_FUNCTIONS
631# define coro_init_stacks(thx) init_stacks ()
632#else
633static void
485coro_init_stacks (pTHX) 634coro_init_stacks (pTHX)
486{ 635{
487 LOCK; 636 PL_curstackinfo = new_stackinfo(32, 8);
488
489 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
490 PL_curstackinfo->si_type = PERLSI_MAIN; 637 PL_curstackinfo->si_type = PERLSI_MAIN;
491 PL_curstack = PL_curstackinfo->si_stack; 638 PL_curstack = PL_curstackinfo->si_stack;
492 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 639 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
493 640
494 PL_stack_base = AvARRAY(PL_curstack); 641 PL_stack_base = AvARRAY(PL_curstack);
495 PL_stack_sp = PL_stack_base; 642 PL_stack_sp = PL_stack_base;
496 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 643 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
497 644
498 New(50,PL_tmps_stack,96,SV*); 645 New(50,PL_tmps_stack,32,SV*);
499 PL_tmps_floor = -1; 646 PL_tmps_floor = -1;
500 PL_tmps_ix = -1; 647 PL_tmps_ix = -1;
501 PL_tmps_max = 96; 648 PL_tmps_max = 32;
502 649
503 New(54,PL_markstack,16,I32); 650 New(54,PL_markstack,16,I32);
504 PL_markstack_ptr = PL_markstack; 651 PL_markstack_ptr = PL_markstack;
505 PL_markstack_max = PL_markstack + 16; 652 PL_markstack_max = PL_markstack + 16;
506 653
507#ifdef SET_MARK_OFFSET 654#ifdef SET_MARK_OFFSET
508 SET_MARK_OFFSET; 655 SET_MARK_OFFSET;
509#endif 656#endif
510 657
511 New(54,PL_scopestack,16,I32); 658 New(54,PL_scopestack,8,I32);
512 PL_scopestack_ix = 0; 659 PL_scopestack_ix = 0;
513 PL_scopestack_max = 16; 660 PL_scopestack_max = 8;
514 661
515 New(54,PL_savestack,96,ANY); 662 New(54,PL_savestack,24,ANY);
516 PL_savestack_ix = 0; 663 PL_savestack_ix = 0;
517 PL_savestack_max = 96; 664 PL_savestack_max = 24;
518 665
666#if !PERL_VERSION_ATLEAST (5,10,0)
519 New(54,PL_retstack,8,OP*); 667 New(54,PL_retstack,4,OP*);
520 PL_retstack_ix = 0; 668 PL_retstack_ix = 0;
521 PL_retstack_max = 8; 669 PL_retstack_max = 4;
522 670#endif
523 UNLOCK;
524} 671}
672#endif
525 673
526/* 674/*
527 * destroy the stacks, the callchain etc... 675 * destroy the stacks, the callchain etc...
528 */ 676 */
529STATIC void 677static void
530destroy_stacks(pTHX) 678coro_destruct_stacks (pTHX)
531{ 679{
532 if (!IN_DESTRUCT)
533 {
534 /* is this ugly, I ask? */
535 LEAVE_SCOPE (0);
536
537 /* sure it is, but more important: is it correct?? :/ */
538 FREETMPS;
539
540 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
541 }
542
543 while (PL_curstackinfo->si_next) 680 while (PL_curstackinfo->si_next)
544 PL_curstackinfo = PL_curstackinfo->si_next; 681 PL_curstackinfo = PL_curstackinfo->si_next;
545 682
546 while (PL_curstackinfo) 683 while (PL_curstackinfo)
547 { 684 {
548 PERL_SI *p = PL_curstackinfo->si_prev; 685 PERL_SI *p = PL_curstackinfo->si_prev;
549 686
550 { /*D*//*remove*/
551 dSP;
552 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
553 PUTBACK; /* possibly superfluous */
554 }
555
556 if (!IN_DESTRUCT) 687 if (!IN_DESTRUCT)
557 {
558 dounwind (-1);/*D*//*remove*/
559 SvREFCNT_dec (PL_curstackinfo->si_stack); 688 SvREFCNT_dec (PL_curstackinfo->si_stack);
560 }
561 689
562 Safefree (PL_curstackinfo->si_cxstack); 690 Safefree (PL_curstackinfo->si_cxstack);
563 Safefree (PL_curstackinfo); 691 Safefree (PL_curstackinfo);
564 PL_curstackinfo = p; 692 PL_curstackinfo = p;
565 } 693 }
566 694
567 Safefree (PL_tmps_stack); 695 Safefree (PL_tmps_stack);
568 Safefree (PL_markstack); 696 Safefree (PL_markstack);
569 Safefree (PL_scopestack); 697 Safefree (PL_scopestack);
570 Safefree (PL_savestack); 698 Safefree (PL_savestack);
699#if !PERL_VERSION_ATLEAST (5,10,0)
571 Safefree (PL_retstack); 700 Safefree (PL_retstack);
572}
573
574static void
575allocate_stack (Coro__State ctx, int alloc)
576{
577 coro_stack *stack;
578
579 New (0, stack, 1, coro_stack);
580
581 stack->refcnt = 1;
582 stack->usecnt = 1;
583 stack->gencnt = ctx->gencnt = 0;
584
585 if (alloc)
586 {
587#if HAVE_MMAP
588 stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
589 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
590 if (stack->sptr == (void *)-1)
591#endif 701#endif
702}
703
704#define CORO_RSS \
705 rss += sizeof (SYM (curstackinfo)); \
706 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
707 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
708 rss += SYM (tmps_max) * sizeof (SV *); \
709 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
710 rss += SYM (scopestack_max) * sizeof (I32); \
711 rss += SYM (savestack_max) * sizeof (ANY);
712
713static size_t
714coro_rss (pTHX_ struct coro *coro)
715{
716 size_t rss = sizeof (*coro);
717
718 if (coro->mainstack)
719 {
720 if (coro->flags & CF_RUNNING)
592 { 721 {
593 /*FIXME*//*D*//* reasonable stack size! */ 722 #define SYM(sym) PL_ ## sym
594 stack->ssize = - (8192 * sizeof (long)); 723 CORO_RSS;
595 New (0, stack->sptr, 8192, long); 724 #undef SYM
596 } 725 }
597 }
598 else 726 else
599 stack->sptr = 0;
600
601 ctx->stack = stack;
602}
603
604static void
605deallocate_stack (Coro__State ctx)
606{
607 coro_stack *stack = ctx->stack;
608
609 ctx->stack = 0;
610
611 if (stack)
612 {
613 if (!--stack->refcnt)
614 { 727 {
615#ifdef HAVE_MMAP 728 #define SYM(sym) coro->slot->sym
616 if (stack->ssize > 0 && stack->sptr) 729 CORO_RSS;
617 munmap (stack->sptr, stack->ssize); 730 #undef SYM
618 else 731 }
732 }
733
734 return rss;
735}
736
737/** coroutine stack handling ************************************************/
738
739static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
740static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
741static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
742
743/* apparently < 5.8.8 */
744#ifndef MgPV_nolen_const
745#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
746 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
747 (const char*)(mg)->mg_ptr)
619#endif 748#endif
620 Safefree (stack->sptr);
621 749
622 Safefree (stack); 750/*
751 * This overrides the default magic get method of %SIG elements.
752 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
753 * and instead of tryign to save and restore the hash elements, we just provide
754 * readback here.
755 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
756 * not expecting this to actually change the hook. This is a potential problem
757 * when a schedule happens then, but we ignore this.
758 */
759static int
760coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
761{
762 const char *s = MgPV_nolen_const (mg);
763
764 if (*s == '_')
765 {
766 SV **svp = 0;
767
768 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
769 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
770
771 if (svp)
772 {
773 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
774 return 0;
623 } 775 }
624 else if (ctx->gencnt == stack->gencnt) 776 }
625 --stack->usecnt; 777
778 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
779}
780
781static int
782coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
783{
784 const char *s = MgPV_nolen_const (mg);
785
786 if (*s == '_')
626 } 787 {
627} 788 SV **svp = 0;
628 789
790 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
791 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
792
793 if (svp)
794 {
795 SV *old = *svp;
796 *svp = 0;
797 SvREFCNT_dec (old);
798 return 0;
799 }
800 }
801
802 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
803}
804
629static void 805static int
630setup_coro (void *arg) 806coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
807{
808 const char *s = MgPV_nolen_const (mg);
809
810 if (*s == '_')
811 {
812 SV **svp = 0;
813
814 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
815 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
816
817 if (svp)
818 {
819 SV *old = *svp;
820 *svp = newSVsv (sv);
821 SvREFCNT_dec (old);
822 return 0;
823 }
824 }
825
826 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
827}
828
829static void
830prepare_nop (pTHX_ struct coro_transfer_args *ta)
831{
832 /* kind of mega-hacky, but works */
833 ta->next = ta->prev = (struct coro *)ta;
834}
835
836static int
837slf_check_nop (pTHX_ struct CoroSLF *frame)
838{
839 return 0;
840}
841
842static int
843slf_check_repeat (pTHX_ struct CoroSLF *frame)
844{
845 return 1;
846}
847
848static UNOP coro_setup_op;
849
850static void NOINLINE /* noinline to keep it out of the transfer fast path */
851coro_setup (pTHX_ struct coro *coro)
631{ 852{
632 /* 853 /*
633 * emulate part of the perl startup here. 854 * emulate part of the perl startup here.
634 */ 855 */
635 dTHX;
636 dSP;
637 Coro__State ctx = (Coro__State)arg;
638 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
639
640 coro_init_stacks (aTHX); 856 coro_init_stacks (aTHX);
641 /*PL_curcop = 0;*/ 857
642 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 858 PL_runops = RUNOPS_DEFAULT;
859 PL_curcop = &PL_compiling;
860 PL_in_eval = EVAL_NULL;
861 PL_comppad = 0;
862 PL_curpm = 0;
863 PL_curpad = 0;
864 PL_localizing = 0;
865 PL_dirty = 0;
866 PL_restartop = 0;
867#if PERL_VERSION_ATLEAST (5,10,0)
868 PL_parser = 0;
869#endif
870
871 /* recreate the die/warn hooks */
872 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
873 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
874
875 GvSV (PL_defgv) = newSV (0);
876 GvAV (PL_defgv) = coro->args; coro->args = 0;
877 GvSV (PL_errgv) = newSV (0);
878 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
879 PL_rs = newSVsv (GvSV (irsgv));
880 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
881
882 {
883 dSP;
884 UNOP myop;
885
886 Zero (&myop, 1, UNOP);
887 myop.op_next = Nullop;
888 myop.op_type = OP_ENTERSUB;
889 myop.op_flags = OPf_WANT_VOID;
890
891 PUSHMARK (SP);
892 PUSHs ((SV *)coro->startcv);
893 PUTBACK;
894 PL_op = (OP *)&myop;
895 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
896 }
897
898 /* this newly created coroutine might be run on an existing cctx which most
899 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
900 */
901 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
902 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
903
904 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
905 coro_setup_op.op_next = PL_op;
906 coro_setup_op.op_type = OP_CUSTOM;
907 coro_setup_op.op_ppaddr = pp_slf;
908 /* no flags etc. required, as an init function won't be called */
909
910 PL_op = (OP *)&coro_setup_op;
911
912 /* copy throw, in case it was set before coro_setup */
913 CORO_THROW = coro->except;
914}
915
916static void
917coro_destruct (pTHX_ struct coro *coro)
918{
919 if (!IN_DESTRUCT)
920 {
921 /* restore all saved variables and stuff */
922 LEAVE_SCOPE (0);
923 assert (PL_tmps_floor == -1);
924
925 /* free all temporaries */
926 FREETMPS;
927 assert (PL_tmps_ix == -1);
928
929 /* unwind all extra stacks */
930 POPSTACK_TO (PL_mainstack);
931
932 /* unwind main stack */
933 dounwind (-1);
934 }
935
936 SvREFCNT_dec (GvSV (PL_defgv));
643 SvREFCNT_dec (GvAV (PL_defgv)); 937 SvREFCNT_dec (GvAV (PL_defgv));
644 GvAV (PL_defgv) = ctx->args; ctx->args = 0; 938 SvREFCNT_dec (GvSV (PL_errgv));
939 SvREFCNT_dec (PL_defoutgv);
940 SvREFCNT_dec (PL_rs);
941 SvREFCNT_dec (GvSV (irsgv));
645 942
646 SPAGAIN; 943 SvREFCNT_dec (PL_diehook);
944 SvREFCNT_dec (PL_warnhook);
945
946 SvREFCNT_dec (coro->saved_deffh);
947 SvREFCNT_dec (coro->rouse_cb);
948 SvREFCNT_dec (coro->invoke_cb);
949 SvREFCNT_dec (coro->invoke_av);
647 950
951 coro_destruct_stacks (aTHX);
952}
953
954INLINE void
955free_coro_mortal (pTHX)
956{
957 if (expect_true (coro_mortal))
958 {
959 SvREFCNT_dec (coro_mortal);
960 coro_mortal = 0;
961 }
962}
963
964static int
965runops_trace (pTHX)
966{
967 COP *oldcop = 0;
968 int oldcxix = -2;
969 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
970 coro_cctx *cctx = coro->cctx;
971
972 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
973 {
974 PERL_ASYNC_CHECK ();
975
976 if (cctx->flags & CC_TRACE_ALL)
977 {
978 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
979 {
980 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
981 SV **bot, **top;
982 AV *av = newAV (); /* return values */
983 SV **cb;
984 dSP;
985
986 GV *gv = CvGV (cx->blk_sub.cv);
987 SV *fullname = sv_2mortal (newSV (0));
988 if (isGV (gv))
989 gv_efullname3 (fullname, gv, 0);
990
991 bot = PL_stack_base + cx->blk_oldsp + 1;
992 top = cx->blk_gimme == G_ARRAY ? SP + 1
993 : cx->blk_gimme == G_SCALAR ? bot + 1
994 : bot;
995
996 av_extend (av, top - bot);
997 while (bot < top)
998 av_push (av, SvREFCNT_inc_NN (*bot++));
999
1000 PL_runops = RUNOPS_DEFAULT;
1001 ENTER;
1002 SAVETMPS;
1003 EXTEND (SP, 3);
1004 PUSHMARK (SP);
1005 PUSHs (&PL_sv_no);
1006 PUSHs (fullname);
1007 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1008 PUTBACK;
1009 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1010 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1011 SPAGAIN;
1012 FREETMPS;
1013 LEAVE;
1014 PL_runops = runops_trace;
1015 }
1016
1017 if (oldcop != PL_curcop)
1018 {
1019 oldcop = PL_curcop;
1020
1021 if (PL_curcop != &PL_compiling)
1022 {
1023 SV **cb;
1024
1025 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
1026 {
1027 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1028
1029 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1030 {
1031 runops_proc_t old_runops = PL_runops;
1032 dSP;
1033 GV *gv = CvGV (cx->blk_sub.cv);
1034 SV *fullname = sv_2mortal (newSV (0));
1035
1036 if (isGV (gv))
1037 gv_efullname3 (fullname, gv, 0);
1038
1039 PL_runops = RUNOPS_DEFAULT;
1040 ENTER;
1041 SAVETMPS;
1042 EXTEND (SP, 3);
1043 PUSHMARK (SP);
1044 PUSHs (&PL_sv_yes);
1045 PUSHs (fullname);
1046 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1047 PUTBACK;
1048 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1049 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1050 SPAGAIN;
1051 FREETMPS;
1052 LEAVE;
1053 PL_runops = runops_trace;
1054 }
1055
1056 oldcxix = cxstack_ix;
1057 }
1058
1059 if (cctx->flags & CC_TRACE_LINE)
1060 {
1061 dSP;
1062
1063 PL_runops = RUNOPS_DEFAULT;
1064 ENTER;
1065 SAVETMPS;
1066 EXTEND (SP, 3);
1067 PL_runops = RUNOPS_DEFAULT;
1068 PUSHMARK (SP);
1069 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1070 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1071 PUTBACK;
1072 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1073 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1074 SPAGAIN;
1075 FREETMPS;
1076 LEAVE;
1077 PL_runops = runops_trace;
1078 }
1079 }
1080 }
1081 }
1082 }
1083
1084 TAINT_NOT;
1085 return 0;
1086}
1087
1088static struct coro_cctx *cctx_ssl_cctx;
1089static struct CoroSLF cctx_ssl_frame;
1090
1091static void
1092slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1093{
1094 ta->prev = (struct coro *)cctx_ssl_cctx;
1095 ta->next = 0;
1096}
1097
1098static int
1099slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1100{
1101 *frame = cctx_ssl_frame;
1102
1103 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1104}
1105
1106/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1107static void NOINLINE
1108cctx_prepare (pTHX_ coro_cctx *cctx)
1109{
1110 PL_top_env = &PL_start_env;
1111
1112 if (cctx->flags & CC_TRACE)
1113 PL_runops = runops_trace;
1114
1115 /* we already must be executing an SLF op, there is no other valid way
1116 * that can lead to creation of a new cctx */
1117 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1118 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1119
1120 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1121 cctx_ssl_cctx = cctx;
1122 cctx_ssl_frame = slf_frame;
1123
1124 slf_frame.prepare = slf_prepare_set_stacklevel;
1125 slf_frame.check = slf_check_set_stacklevel;
1126}
1127
1128/* the tail of transfer: execute stuff we can only do after a transfer */
1129INLINE void
1130transfer_tail (pTHX)
1131{
1132 free_coro_mortal (aTHX);
1133}
1134
1135/*
1136 * this is a _very_ stripped down perl interpreter ;)
1137 */
1138static void
1139cctx_run (void *arg)
1140{
1141#ifdef USE_ITHREADS
1142# if CORO_PTHREAD
1143 PERL_SET_CONTEXT (coro_thx);
1144# endif
1145#endif
1146 {
1147 dTHX;
1148
1149 /* normally we would need to skip the entersub here */
1150 /* not doing so will re-execute it, which is exactly what we want */
1151 /* PL_nop = PL_nop->op_next */
1152
1153 /* inject a fake subroutine call to cctx_init */
1154 cctx_prepare (aTHX_ (coro_cctx *)arg);
1155
1156 /* cctx_run is the alternative tail of transfer() */
1157 transfer_tail (aTHX);
1158
1159 /* somebody or something will hit me for both perl_run and PL_restartop */
1160 PL_restartop = PL_op;
1161 perl_run (PL_curinterp);
1162 /*
1163 * Unfortunately, there is no way to get at the return values of the
1164 * coro body here, as perl_run destroys these
1165 */
1166
1167 /*
1168 * If perl-run returns we assume exit() was being called or the coro
1169 * fell off the end, which seems to be the only valid (non-bug)
1170 * reason for perl_run to return. We try to exit by jumping to the
1171 * bootstrap-time "top" top_env, as we cannot restore the "main"
1172 * coroutine as Coro has no such concept
1173 */
1174 PL_top_env = main_top_env;
1175 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1176 }
1177}
1178
1179static coro_cctx *
1180cctx_new ()
1181{
1182 coro_cctx *cctx;
1183
1184 ++cctx_count;
1185 New (0, cctx, 1, coro_cctx);
1186
1187 cctx->gen = cctx_gen;
1188 cctx->flags = 0;
1189 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1190
1191 return cctx;
1192}
1193
1194/* create a new cctx only suitable as source */
1195static coro_cctx *
1196cctx_new_empty ()
1197{
1198 coro_cctx *cctx = cctx_new ();
1199
1200 cctx->sptr = 0;
1201 coro_create (&cctx->cctx, 0, 0, 0, 0);
1202
1203 return cctx;
1204}
1205
1206/* create a new cctx suitable as destination/running a perl interpreter */
1207static coro_cctx *
1208cctx_new_run ()
1209{
1210 coro_cctx *cctx = cctx_new ();
1211 void *stack_start;
1212 size_t stack_size;
1213
1214#if HAVE_MMAP
1215 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1216 /* mmap supposedly does allocate-on-write for us */
1217 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1218
1219 if (cctx->sptr != (void *)-1)
1220 {
1221 #if CORO_STACKGUARD
1222 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1223 #endif
1224 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1225 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1226 cctx->flags |= CC_MAPPED;
1227 }
1228 else
1229#endif
1230 {
1231 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1232 New (0, cctx->sptr, cctx_stacksize, long);
1233
1234 if (!cctx->sptr)
1235 {
1236 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1237 _exit (EXIT_FAILURE);
1238 }
1239
1240 stack_start = cctx->sptr;
1241 stack_size = cctx->ssize;
1242 }
1243
1244 #if CORO_USE_VALGRIND
1245 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1246 #endif
1247
1248 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1249
1250 return cctx;
1251}
1252
1253static void
1254cctx_destroy (coro_cctx *cctx)
1255{
1256 if (!cctx)
1257 return;
1258
1259 --cctx_count;
1260 coro_destroy (&cctx->cctx);
1261
1262 /* coro_transfer creates new, empty cctx's */
648 if (ctx->stack) 1263 if (cctx->sptr)
1264 {
1265 #if CORO_USE_VALGRIND
1266 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1267 #endif
1268
1269#if HAVE_MMAP
1270 if (cctx->flags & CC_MAPPED)
1271 munmap (cctx->sptr, cctx->ssize);
1272 else
1273#endif
1274 Safefree (cctx->sptr);
649 { 1275 }
650 ctx->cursp = 0;
651 1276
1277 Safefree (cctx);
1278}
1279
1280/* wether this cctx should be destructed */
1281#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1282
1283static coro_cctx *
1284cctx_get (pTHX)
1285{
1286 while (expect_true (cctx_first))
1287 {
1288 coro_cctx *cctx = cctx_first;
1289 cctx_first = cctx->next;
1290 --cctx_idle;
1291
1292 if (expect_true (!CCTX_EXPIRED (cctx)))
1293 return cctx;
1294
1295 cctx_destroy (cctx);
1296 }
1297
1298 return cctx_new_run ();
1299}
1300
1301static void
1302cctx_put (coro_cctx *cctx)
1303{
1304 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1305
1306 /* free another cctx if overlimit */
1307 if (expect_false (cctx_idle >= cctx_max_idle))
1308 {
1309 coro_cctx *first = cctx_first;
1310 cctx_first = first->next;
1311 --cctx_idle;
1312
1313 cctx_destroy (first);
1314 }
1315
1316 ++cctx_idle;
1317 cctx->next = cctx_first;
1318 cctx_first = cctx;
1319}
1320
1321/** coroutine switching *****************************************************/
1322
1323static void
1324transfer_check (pTHX_ struct coro *prev, struct coro *next)
1325{
1326 /* TODO: throwing up here is considered harmful */
1327
1328 if (expect_true (prev != next))
1329 {
1330 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1331 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1332
1333 if (expect_false (next->flags & CF_RUNNING))
1334 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1335
1336 if (expect_false (next->flags & CF_DESTROYED))
1337 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1338
1339#if !PERL_VERSION_ATLEAST (5,10,0)
1340 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1341 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1342#endif
1343 }
1344}
1345
1346/* always use the TRANSFER macro */
1347static void NOINLINE /* noinline so we have a fixed stackframe */
1348transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1349{
1350 dSTACKLEVEL;
1351
1352 /* sometimes transfer is only called to set idle_sp */
1353 if (expect_false (!next))
1354 {
1355 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1356 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1357 }
1358 else if (expect_true (prev != next))
1359 {
1360 coro_cctx *prev__cctx;
1361
1362 if (expect_false (prev->flags & CF_NEW))
1363 {
1364 /* create a new empty/source context */
1365 prev->cctx = cctx_new_empty ();
1366 prev->flags &= ~CF_NEW;
1367 prev->flags |= CF_RUNNING;
1368 }
1369
1370 prev->flags &= ~CF_RUNNING;
1371 next->flags |= CF_RUNNING;
1372
1373 /* first get rid of the old state */
1374 save_perl (aTHX_ prev);
1375
1376 if (expect_false (next->flags & CF_NEW))
1377 {
1378 /* need to start coroutine */
1379 next->flags &= ~CF_NEW;
1380 /* setup coroutine call */
1381 coro_setup (aTHX_ next);
1382 }
1383 else
1384 load_perl (aTHX_ next);
1385
1386 prev__cctx = prev->cctx;
1387
1388 /* possibly untie and reuse the cctx */
1389 if (expect_true (
1390 prev__cctx->idle_sp == STACKLEVEL
1391 && !(prev__cctx->flags & CC_TRACE)
1392 && !force_cctx
1393 ))
1394 {
1395 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1396 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1397
1398 prev->cctx = 0;
1399
1400 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1401 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1402 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1403 if (!next->cctx)
1404 next->cctx = cctx_get (aTHX);
1405
1406 cctx_put (prev__cctx);
1407 }
1408
1409 ++next->usecount;
1410
1411 if (expect_true (!next->cctx))
1412 next->cctx = cctx_get (aTHX);
1413
1414 if (expect_false (prev__cctx != next->cctx))
1415 {
1416 prev__cctx->top_env = PL_top_env;
1417 PL_top_env = next->cctx->top_env;
1418 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1419 }
1420
1421 transfer_tail (aTHX);
1422 }
1423}
1424
1425#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1426#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1427
1428/** high level stuff ********************************************************/
1429
1430static int
1431coro_state_destroy (pTHX_ struct coro *coro)
1432{
1433 if (coro->flags & CF_DESTROYED)
1434 return 0;
1435
1436 if (coro->on_destroy)
1437 coro->on_destroy (aTHX_ coro);
1438
1439 coro->flags |= CF_DESTROYED;
1440
1441 if (coro->flags & CF_READY)
1442 {
1443 /* reduce nready, as destroying a ready coro effectively unreadies it */
1444 /* alternative: look through all ready queues and remove the coro */
1445 --coro_nready;
1446 }
1447 else
1448 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1449
1450 if (coro->mainstack && coro->mainstack != main_mainstack)
1451 {
1452 struct coro temp;
1453
1454 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1455
1456 save_perl (aTHX_ &temp);
1457 load_perl (aTHX_ coro);
1458
1459 coro_destruct (aTHX_ coro);
1460
1461 load_perl (aTHX_ &temp);
1462
1463 coro->slot = 0;
1464 }
1465
1466 cctx_destroy (coro->cctx);
1467 SvREFCNT_dec (coro->startcv);
1468 SvREFCNT_dec (coro->args);
1469 SvREFCNT_dec (CORO_THROW);
1470
1471 if (coro->next) coro->next->prev = coro->prev;
1472 if (coro->prev) coro->prev->next = coro->next;
1473 if (coro == coro_first) coro_first = coro->next;
1474
1475 return 1;
1476}
1477
1478static int
1479coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1480{
1481 struct coro *coro = (struct coro *)mg->mg_ptr;
1482 mg->mg_ptr = 0;
1483
1484 coro->hv = 0;
1485
1486 if (--coro->refcnt < 0)
1487 {
1488 coro_state_destroy (aTHX_ coro);
1489 Safefree (coro);
1490 }
1491
1492 return 0;
1493}
1494
1495static int
1496coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1497{
1498 struct coro *coro = (struct coro *)mg->mg_ptr;
1499
1500 ++coro->refcnt;
1501
1502 return 0;
1503}
1504
1505static MGVTBL coro_state_vtbl = {
1506 0, 0, 0, 0,
1507 coro_state_free,
1508 0,
1509#ifdef MGf_DUP
1510 coro_state_dup,
1511#else
1512# define MGf_DUP 0
1513#endif
1514};
1515
1516static void
1517prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1518{
1519 ta->prev = SvSTATE (prev_sv);
1520 ta->next = SvSTATE (next_sv);
1521 TRANSFER_CHECK (*ta);
1522}
1523
1524static void
1525api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1526{
1527 struct coro_transfer_args ta;
1528
1529 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1530 TRANSFER (ta, 1);
1531}
1532
1533/*****************************************************************************/
1534/* gensub: simple closure generation utility */
1535
1536#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1537
1538/* create a closure from XS, returns a code reference */
1539/* the arg can be accessed via GENSUB_ARG from the callback */
1540/* the callback must use dXSARGS/XSRETURN */
1541static SV *
1542gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1543{
1544 CV *cv = (CV *)newSV (0);
1545
1546 sv_upgrade ((SV *)cv, SVt_PVCV);
1547
1548 CvANON_on (cv);
1549 CvISXSUB_on (cv);
1550 CvXSUB (cv) = xsub;
1551 GENSUB_ARG = arg;
1552
1553 return newRV_noinc ((SV *)cv);
1554}
1555
1556/** Coro ********************************************************************/
1557
1558INLINE void
1559coro_enq (pTHX_ struct coro *coro)
1560{
1561 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1562}
1563
1564INLINE SV *
1565coro_deq (pTHX)
1566{
1567 int prio;
1568
1569 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1570 if (AvFILLp (coro_ready [prio]) >= 0)
1571 return av_shift (coro_ready [prio]);
1572
1573 return 0;
1574}
1575
1576static int
1577api_ready (pTHX_ SV *coro_sv)
1578{
1579 struct coro *coro;
1580 SV *sv_hook;
1581 void (*xs_hook)(void);
1582
1583 if (SvROK (coro_sv))
1584 coro_sv = SvRV (coro_sv);
1585
1586 coro = SvSTATE (coro_sv);
1587
1588 if (coro->flags & CF_READY)
1589 return 0;
1590
1591 coro->flags |= CF_READY;
1592
1593 sv_hook = coro_nready ? 0 : coro_readyhook;
1594 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1595
1596 coro_enq (aTHX_ coro);
1597 ++coro_nready;
1598
1599 if (sv_hook)
1600 {
1601 dSP;
1602
1603 ENTER;
1604 SAVETMPS;
1605
652 PUSHMARK(SP); 1606 PUSHMARK (SP);
653 PUTBACK; 1607 PUTBACK;
654 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 1608 call_sv (sv_hook, G_VOID | G_DISCARD);
655 1609
656 if (SvTRUE (ERRSV)) 1610 FREETMPS;
657 croak (NULL); 1611 LEAVE;
658 else
659 croak ("FATAL: CCTXT coroutine returned!");
660 }
661 else
662 { 1612 }
663 UNOP myop;
664 1613
665 PL_op = (OP *)&myop; 1614 if (xs_hook)
1615 xs_hook ();
666 1616
667 Zero(&myop, 1, UNOP); 1617 return 1;
668 myop.op_next = Nullop; 1618}
669 myop.op_flags = OPf_WANT_VOID;
670 1619
671 PUSHMARK(SP); 1620static int
672 XPUSHs (sub_init); 1621api_is_ready (pTHX_ SV *coro_sv)
673 /* 1622{
674 * the next line is slightly wrong, as PL_op->op_next 1623 return !!(SvSTATE (coro_sv)->flags & CF_READY);
675 * is actually being executed so we skip the first op. 1624}
676 * that doesn't matter, though, since it is only
677 * pp_nextstate and we never return...
678 * ah yes, and I don't care anyways ;)
679 */
680 PUTBACK;
681 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
682 SPAGAIN;
683 1625
684 ENTER; /* necessary e.g. for dounwind */ 1626/* expects to own a reference to next->hv */
1627INLINE void
1628prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1629{
1630 SV *prev_sv = SvRV (coro_current);
1631
1632 ta->prev = SvSTATE_hv (prev_sv);
1633 ta->next = next;
1634
1635 TRANSFER_CHECK (*ta);
1636
1637 SvRV_set (coro_current, (SV *)next->hv);
1638
1639 free_coro_mortal (aTHX);
1640 coro_mortal = prev_sv;
1641}
1642
1643static void
1644prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1645{
1646 for (;;)
685 } 1647 {
686} 1648 SV *next_sv = coro_deq (aTHX);
687 1649
688static void 1650 if (expect_true (next_sv))
689continue_coro (void *arg)
690{
691 /*
692 * this is a _very_ stripped down perl interpreter ;)
693 */
694 dTHX;
695 Coro__State ctx = (Coro__State)arg;
696 JMPENV coro_start_env;
697
698 PL_top_env = &ctx->start_env;
699
700 ctx->cursp = 0;
701 PL_op = PL_op->op_next;
702 CALLRUNOPS(aTHX);
703
704 abort ();
705}
706
707STATIC void
708transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
709{
710 dSTACKLEVEL;
711
712 if (prev != next)
713 {
714 if (next->mainstack)
715 { 1651 {
716 LOCK; 1652 struct coro *next = SvSTATE_hv (next_sv);
717 SAVE (prev, flags);
718 LOAD (next);
719 UNLOCK;
720 1653
721 /* mark this state as in-use */ 1654 /* cannot transfer to destroyed coros, skip and look for next */
722 next->mainstack = 0; 1655 if (expect_false (next->flags & CF_DESTROYED))
723 next->tmps_ix = -2; 1656 SvREFCNT_dec (next_sv); /* coro_nready has already been taken care of by destroy */
724 1657 else
725 /* stacklevel changed? if yes, grab the stack for us! */
726 if (flags & TRANSFER_SAVE_CCTXT)
727 { 1658 {
728 if (!prev->stack) 1659 next->flags &= ~CF_READY;
729 allocate_stack (prev, 0); 1660 --coro_nready;
730 else if (prev->cursp != stacklevel
731 && prev->stack->usecnt > 1)
732 {
733 prev->gencnt = ++prev->stack->gencnt;
734 prev->stack->usecnt = 1;
735 }
736 1661
737 /* has our stack been invalidated? */ 1662 return prepare_schedule_to (aTHX_ ta, next);
738 if (next->stack && next->stack->gencnt != next->gencnt)
739 {
740 deallocate_stack (next);
741 allocate_stack (next, 1);
742 coro_create (&(next->stack->cctx),
743 continue_coro, (void *)next,
744 next->stack->sptr, labs (next->stack->ssize));
745 }
746
747 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
748 prev->cursp = stacklevel;
749 /* don't add any code here */
750 } 1663 }
751 else
752 next->cursp = stacklevel;
753 } 1664 }
754 else if (next->tmps_ix == -2)
755 croak ("tried to transfer to running coroutine");
756 else 1665 else
757 { 1666 {
1667 /* nothing to schedule: call the idle handler */
758 LOCK; 1668 dSP;
759 SAVE (prev, -1); /* first get rid of the old state */ 1669
1670 ENTER;
1671 SAVETMPS;
1672
1673 PUSHMARK (SP);
760 UNLOCK; 1674 PUTBACK;
1675 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
761 1676
762 if (flags & TRANSFER_SAVE_CCTXT) 1677 FREETMPS;
1678 LEAVE;
1679 }
1680 }
1681}
1682
1683INLINE void
1684prepare_cede (pTHX_ struct coro_transfer_args *ta)
1685{
1686 api_ready (aTHX_ coro_current);
1687 prepare_schedule (aTHX_ ta);
1688}
1689
1690INLINE void
1691prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1692{
1693 SV *prev = SvRV (coro_current);
1694
1695 if (coro_nready)
1696 {
1697 prepare_schedule (aTHX_ ta);
1698 api_ready (aTHX_ prev);
1699 }
1700 else
1701 prepare_nop (aTHX_ ta);
1702}
1703
1704static void
1705api_schedule (pTHX)
1706{
1707 struct coro_transfer_args ta;
1708
1709 prepare_schedule (aTHX_ &ta);
1710 TRANSFER (ta, 1);
1711}
1712
1713static void
1714api_schedule_to (pTHX_ SV *coro_sv)
1715{
1716 struct coro_transfer_args ta;
1717 struct coro *next = SvSTATE (coro_sv);
1718
1719 SvREFCNT_inc_NN (coro_sv);
1720 prepare_schedule_to (aTHX_ &ta, next);
1721}
1722
1723static int
1724api_cede (pTHX)
1725{
1726 struct coro_transfer_args ta;
1727
1728 prepare_cede (aTHX_ &ta);
1729
1730 if (expect_true (ta.prev != ta.next))
1731 {
1732 TRANSFER (ta, 1);
1733 return 1;
1734 }
1735 else
1736 return 0;
1737}
1738
1739static int
1740api_cede_notself (pTHX)
1741{
1742 if (coro_nready)
1743 {
1744 struct coro_transfer_args ta;
1745
1746 prepare_cede_notself (aTHX_ &ta);
1747 TRANSFER (ta, 1);
1748 return 1;
1749 }
1750 else
1751 return 0;
1752}
1753
1754static void
1755api_trace (pTHX_ SV *coro_sv, int flags)
1756{
1757 struct coro *coro = SvSTATE (coro_sv);
1758
1759 if (flags & CC_TRACE)
1760 {
1761 if (!coro->cctx)
1762 coro->cctx = cctx_new_run ();
1763 else if (!(coro->cctx->flags & CC_TRACE))
1764 croak ("cannot enable tracing on coroutine with custom stack,");
1765
1766 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1767 }
1768 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1769 {
1770 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1771
1772 if (coro->flags & CF_RUNNING)
1773 PL_runops = RUNOPS_DEFAULT;
1774 else
1775 coro->slot->runops = RUNOPS_DEFAULT;
1776 }
1777}
1778
1779static void
1780coro_call_on_destroy (pTHX_ struct coro *coro)
1781{
1782 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1783 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1784
1785 if (on_destroyp)
1786 {
1787 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1788
1789 while (AvFILLp (on_destroy) >= 0)
1790 {
1791 dSP; /* don't disturb outer sp */
1792 SV *cb = av_pop (on_destroy);
1793
1794 PUSHMARK (SP);
1795
1796 if (statusp)
763 { 1797 {
764 if (!prev->stack)
765 allocate_stack (prev, 0);
766
767 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
768 { 1798 int i;
769 PL_top_env = &next->start_env; 1799 AV *status = (AV *)SvRV (*statusp);
1800 EXTEND (SP, AvFILLp (status) + 1);
770 1801
771 setup_coro (next); 1802 for (i = 0; i <= AvFILLp (status); ++i)
772 next->cursp = stacklevel; 1803 PUSHs (AvARRAY (status)[i]);
773
774 prev->stack->refcnt++;
775 prev->stack->usecnt++;
776 next->stack = prev->stack;
777 next->gencnt = prev->gencnt;
778 }
779 else
780 {
781 assert (!next->stack);
782 allocate_stack (next, 1);
783 coro_create (&(next->stack->cctx),
784 setup_coro, (void *)next,
785 next->stack->sptr, labs (next->stack->ssize));
786 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
787 prev->cursp = stacklevel;
788 /* don't add any code here */
789 }
790 } 1804 }
791 else 1805
792 { 1806 PUTBACK;
793 setup_coro (next); 1807 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
794 next->cursp = stacklevel;
795 }
796 } 1808 }
797 } 1809 }
798
799 LOCK;
800 if (coro_mortal)
801 {
802 SvREFCNT_dec (coro_mortal);
803 coro_mortal = 0;
804 }
805 UNLOCK;
806} 1810}
807 1811
808#define SV_CORO(sv,func) \
809 do { \
810 if (SvROK (sv)) \
811 sv = SvRV (sv); \
812 \
813 if (SvTYPE (sv) == SVt_PVHV) \
814 { \
815 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
816 \
817 if (!he) \
818 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
819 \
820 (sv) = SvRV (HeVAL(he)); \
821 } \
822 \
823 /* must also be changed inside Coro::Cont::yield */ \
824 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
825 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
826 \
827 } while(0)
828
829#define SvSTATE(sv) (struct coro *)SvIV (sv)
830
831static void 1812static void
832api_transfer(pTHX_ SV *prev, SV *next, int flags) 1813slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
833{ 1814{
834 SV_CORO (prev, "Coro::transfer"); 1815 int i;
835 SV_CORO (next, "Coro::transfer"); 1816 HV *hv = (HV *)SvRV (coro_current);
1817 AV *av = newAV ();
836 1818
837 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1819 av_extend (av, items - 1);
838} 1820 for (i = 0; i < items; ++i)
1821 av_push (av, SvREFCNT_inc_NN (arg [i]));
839 1822
1823 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1824
1825 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1826 api_ready (aTHX_ sv_manager);
1827
1828 frame->prepare = prepare_schedule;
1829 frame->check = slf_check_repeat;
1830}
1831
840/** Coro ********************************************************************/ 1832/*****************************************************************************/
1833/* async pool handler */
841 1834
842#define PRIO_MAX 3
843#define PRIO_HIGH 1
844#define PRIO_NORMAL 0
845#define PRIO_LOW -1
846#define PRIO_IDLE -3
847#define PRIO_MIN -4
848
849/* for Coro.pm */
850static GV *coro_current, *coro_idle;
851static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
852static int coro_nready;
853
854static void 1835static int
855coro_enq (pTHX_ SV *sv) 1836slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
856{ 1837{
857 if (SvTYPE (sv) == SVt_PVHV) 1838 HV *hv = (HV *)SvRV (coro_current);
1839 struct coro *coro = (struct coro *)frame->data;
1840
1841 if (!coro->invoke_cb)
1842 return 1; /* loop till we have invoke */
1843 else
1844 {
1845 hv_store (hv, "desc", sizeof ("desc") - 1,
1846 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1847
1848 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1849
858 { 1850 {
859 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0); 1851 dSP;
860 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 1852 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1853 PUTBACK;
1854 }
861 1855
862 prio = prio > PRIO_MAX ? PRIO_MAX 1856 SvREFCNT_dec (GvAV (PL_defgv));
863 : prio < PRIO_MIN ? PRIO_MIN 1857 GvAV (PL_defgv) = coro->invoke_av;
864 : prio; 1858 coro->invoke_av = 0;
865 1859
866 av_push (coro_ready [prio - PRIO_MIN], sv);
867 coro_nready++;
868
869 return; 1860 return 0;
1861 }
1862}
1863
1864static void
1865slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1866{
1867 HV *hv = (HV *)SvRV (coro_current);
1868 struct coro *coro = SvSTATE_hv ((SV *)hv);
1869
1870 if (expect_true (coro->saved_deffh))
870 } 1871 {
1872 /* subsequent iteration */
1873 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1874 coro->saved_deffh = 0;
871 1875
872 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 1876 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1877 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1878 {
1879 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1880 coro->invoke_av = newAV ();
1881
1882 frame->prepare = prepare_nop;
1883 }
1884 else
1885 {
1886 av_clear (GvAV (PL_defgv));
1887 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1888
1889 coro->prio = 0;
1890
1891 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1892 api_trace (aTHX_ coro_current, 0);
1893
1894 frame->prepare = prepare_schedule;
1895 av_push (av_async_pool, SvREFCNT_inc (hv));
1896 }
1897 }
1898 else
1899 {
1900 /* first iteration, simply fall through */
1901 frame->prepare = prepare_nop;
1902 }
1903
1904 frame->check = slf_check_pool_handler;
1905 frame->data = (void *)coro;
1906}
1907
1908/*****************************************************************************/
1909/* rouse callback */
1910
1911#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1912
1913static void
1914coro_rouse_callback (pTHX_ CV *cv)
1915{
1916 dXSARGS;
1917 SV *data = (SV *)GENSUB_ARG;
1918
1919 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1920 {
1921 /* first call, set args */
1922 AV *av = newAV ();
1923 SV *coro = SvRV (data);
1924
1925 SvRV_set (data, (SV *)av);
1926 api_ready (aTHX_ coro);
1927 SvREFCNT_dec (coro);
1928
1929 /* better take a full copy of the arguments */
1930 while (items--)
1931 av_store (av, items, newSVsv (ST (items)));
1932 }
1933
1934 XSRETURN_EMPTY;
1935}
1936
1937static int
1938slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1939{
1940 SV *data = (SV *)frame->data;
1941
1942 if (CORO_THROW)
1943 return 0;
1944
1945 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1946 return 1;
1947
1948 /* now push all results on the stack */
1949 {
1950 dSP;
1951 AV *av = (AV *)SvRV (data);
1952 int i;
1953
1954 EXTEND (SP, AvFILLp (av) + 1);
1955 for (i = 0; i <= AvFILLp (av); ++i)
1956 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1957
1958 /* we have stolen the elements, so ste length to zero and free */
1959 AvFILLp (av) = -1;
1960 av_undef (av);
1961
1962 PUTBACK;
1963 }
1964
1965 return 0;
1966}
1967
1968static void
1969slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1970{
1971 SV *cb;
1972
1973 if (items)
1974 cb = arg [0];
1975 else
1976 {
1977 struct coro *coro = SvSTATE_current;
1978
1979 if (!coro->rouse_cb)
1980 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
1981
1982 cb = sv_2mortal (coro->rouse_cb);
1983 coro->rouse_cb = 0;
1984 }
1985
1986 if (!SvROK (cb)
1987 || SvTYPE (SvRV (cb)) != SVt_PVCV
1988 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
1989 croak ("Coro::rouse_wait called with illegal callback argument,");
1990
1991 {
1992 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
1993 SV *data = (SV *)GENSUB_ARG;
1994
1995 frame->data = (void *)data;
1996 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
1997 frame->check = slf_check_rouse_wait;
1998 }
873} 1999}
874 2000
875static SV * 2001static SV *
876coro_deq (pTHX_ int min_prio) 2002coro_new_rouse_cb (pTHX)
877{ 2003{
878 int prio = PRIO_MAX - PRIO_MIN; 2004 HV *hv = (HV *)SvRV (coro_current);
2005 struct coro *coro = SvSTATE_hv (hv);
2006 SV *data = newRV_inc ((SV *)hv);
2007 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
879 2008
880 min_prio -= PRIO_MIN; 2009 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
881 if (min_prio < 0) 2010 SvREFCNT_dec (data); /* magicext increases the refcount */
882 min_prio = 0;
883 2011
884 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2012 SvREFCNT_dec (coro->rouse_cb);
885 if (av_len (coro_ready[prio]) >= 0) 2013 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2014
2015 return cb;
2016}
2017
2018/*****************************************************************************/
2019/* schedule-like-function opcode (SLF) */
2020
2021static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2022static const CV *slf_cv;
2023static SV **slf_argv;
2024static int slf_argc, slf_arga; /* count, allocated */
2025static I32 slf_ax; /* top of stack, for restore */
2026
2027/* this restores the stack in the case we patched the entersub, to */
2028/* recreate the stack frame as perl will on following calls */
2029/* since entersub cleared the stack */
2030static OP *
2031pp_restore (pTHX)
2032{
2033 int i;
2034 SV **SP = PL_stack_base + slf_ax;
2035
2036 PUSHMARK (SP);
2037
2038 EXTEND (SP, slf_argc + 1);
2039
2040 for (i = 0; i < slf_argc; ++i)
2041 PUSHs (sv_2mortal (slf_argv [i]));
2042
2043 PUSHs ((SV *)CvGV (slf_cv));
2044
2045 RETURNOP (slf_restore.op_first);
2046}
2047
2048static void
2049slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2050{
2051 SV **arg = (SV **)slf_frame.data;
2052
2053 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2054}
2055
2056static void
2057slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2058{
2059 if (items != 2)
2060 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2061
2062 frame->prepare = slf_prepare_transfer;
2063 frame->check = slf_check_nop;
2064 frame->data = (void *)arg; /* let's hope it will stay valid */
2065}
2066
2067static void
2068slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2069{
2070 frame->prepare = prepare_schedule;
2071 frame->check = slf_check_nop;
2072}
2073
2074static void
2075slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2076{
2077 struct coro *next = (struct coro *)slf_frame.data;
2078
2079 SvREFCNT_inc_NN (next->hv);
2080 prepare_schedule_to (aTHX_ ta, next);
2081}
2082
2083static void
2084slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2085{
2086 if (!items)
2087 croak ("Coro::schedule_to expects a coroutine argument, caught");
2088
2089 frame->data = (void *)SvSTATE (arg [0]);
2090 frame->prepare = slf_prepare_schedule_to;
2091 frame->check = slf_check_nop;
2092}
2093
2094static void
2095slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2096{
2097 api_ready (aTHX_ SvRV (coro_current));
2098
2099 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2100}
2101
2102static void
2103slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2104{
2105 frame->prepare = prepare_cede;
2106 frame->check = slf_check_nop;
2107}
2108
2109static void
2110slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2111{
2112 frame->prepare = prepare_cede_notself;
2113 frame->check = slf_check_nop;
2114}
2115
2116/*
2117 * these not obviously related functions are all rolled into one
2118 * function to increase chances that they all will call transfer with the same
2119 * stack offset
2120 * SLF stands for "schedule-like-function".
2121 */
2122static OP *
2123pp_slf (pTHX)
2124{
2125 I32 checkmark; /* mark SP to see how many elements check has pushed */
2126
2127 /* set up the slf frame, unless it has already been set-up */
2128 /* the latter happens when a new coro has been started */
2129 /* or when a new cctx was attached to an existing coroutine */
2130 if (expect_true (!slf_frame.prepare))
2131 {
2132 /* first iteration */
2133 dSP;
2134 SV **arg = PL_stack_base + TOPMARK + 1;
2135 int items = SP - arg; /* args without function object */
2136 SV *gv = *sp;
2137
2138 /* do a quick consistency check on the "function" object, and if it isn't */
2139 /* for us, divert to the real entersub */
2140 if (SvTYPE (gv) != SVt_PVGV
2141 || !GvCV (gv)
2142 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2143 return PL_ppaddr[OP_ENTERSUB](aTHX);
2144
2145 if (!(PL_op->op_flags & OPf_STACKED))
886 { 2146 {
887 coro_nready--; 2147 /* ampersand-form of call, use @_ instead of stack */
888 return av_shift (coro_ready[prio]); 2148 AV *av = GvAV (PL_defgv);
2149 arg = AvARRAY (av);
2150 items = AvFILLp (av) + 1;
889 } 2151 }
2152
2153 /* now call the init function, which needs to set up slf_frame */
2154 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2155 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2156
2157 /* pop args */
2158 SP = PL_stack_base + POPMARK;
2159
2160 PUTBACK;
2161 }
2162
2163 /* now that we have a slf_frame, interpret it! */
2164 /* we use a callback system not to make the code needlessly */
2165 /* complicated, but so we can run multiple perl coros from one cctx */
2166
2167 do
2168 {
2169 struct coro_transfer_args ta;
2170
2171 slf_frame.prepare (aTHX_ &ta);
2172 TRANSFER (ta, 0);
2173
2174 checkmark = PL_stack_sp - PL_stack_base;
2175 }
2176 while (slf_frame.check (aTHX_ &slf_frame));
2177
2178 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2179
2180 /* exception handling */
2181 if (expect_false (CORO_THROW))
2182 {
2183 SV *exception = sv_2mortal (CORO_THROW);
2184
2185 CORO_THROW = 0;
2186 sv_setsv (ERRSV, exception);
2187 croak (0);
2188 }
2189
2190 /* return value handling - mostly like entersub */
2191 /* make sure we put something on the stack in scalar context */
2192 if (GIMME_V == G_SCALAR)
2193 {
2194 dSP;
2195 SV **bot = PL_stack_base + checkmark;
2196
2197 if (sp == bot) /* too few, push undef */
2198 bot [1] = &PL_sv_undef;
2199 else if (sp != bot + 1) /* too many, take last one */
2200 bot [1] = *sp;
2201
2202 SP = bot + 1;
2203
2204 PUTBACK;
2205 }
2206
2207 return NORMAL;
2208}
2209
2210static void
2211api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2212{
2213 int i;
2214 SV **arg = PL_stack_base + ax;
2215 int items = PL_stack_sp - arg + 1;
2216
2217 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2218
2219 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2220 && PL_op->op_ppaddr != pp_slf)
2221 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2222
2223 CvFLAGS (cv) |= CVf_SLF;
2224 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2225 slf_cv = cv;
2226
2227 /* we patch the op, and then re-run the whole call */
2228 /* we have to put the same argument on the stack for this to work */
2229 /* and this will be done by pp_restore */
2230 slf_restore.op_next = (OP *)&slf_restore;
2231 slf_restore.op_type = OP_CUSTOM;
2232 slf_restore.op_ppaddr = pp_restore;
2233 slf_restore.op_first = PL_op;
2234
2235 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2236
2237 if (PL_op->op_flags & OPf_STACKED)
2238 {
2239 if (items > slf_arga)
2240 {
2241 slf_arga = items;
2242 free (slf_argv);
2243 slf_argv = malloc (slf_arga * sizeof (SV *));
2244 }
2245
2246 slf_argc = items;
2247
2248 for (i = 0; i < items; ++i)
2249 slf_argv [i] = SvREFCNT_inc (arg [i]);
2250 }
2251 else
2252 slf_argc = 0;
2253
2254 PL_op->op_ppaddr = pp_slf;
2255 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
2256
2257 PL_op = (OP *)&slf_restore;
2258}
2259
2260/*****************************************************************************/
2261/* PerlIO::cede */
2262
2263typedef struct
2264{
2265 PerlIOBuf base;
2266 NV next, every;
2267} PerlIOCede;
2268
2269static IV
2270PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2271{
2272 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2273
2274 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2275 self->next = nvtime () + self->every;
2276
2277 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2278}
2279
2280static SV *
2281PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2282{
2283 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2284
2285 return newSVnv (self->every);
2286}
2287
2288static IV
2289PerlIOCede_flush (pTHX_ PerlIO *f)
2290{
2291 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2292 double now = nvtime ();
2293
2294 if (now >= self->next)
2295 {
2296 api_cede (aTHX);
2297 self->next = now + self->every;
2298 }
2299
2300 return PerlIOBuf_flush (aTHX_ f);
2301}
2302
2303static PerlIO_funcs PerlIO_cede =
2304{
2305 sizeof(PerlIO_funcs),
2306 "cede",
2307 sizeof(PerlIOCede),
2308 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2309 PerlIOCede_pushed,
2310 PerlIOBuf_popped,
2311 PerlIOBuf_open,
2312 PerlIOBase_binmode,
2313 PerlIOCede_getarg,
2314 PerlIOBase_fileno,
2315 PerlIOBuf_dup,
2316 PerlIOBuf_read,
2317 PerlIOBuf_unread,
2318 PerlIOBuf_write,
2319 PerlIOBuf_seek,
2320 PerlIOBuf_tell,
2321 PerlIOBuf_close,
2322 PerlIOCede_flush,
2323 PerlIOBuf_fill,
2324 PerlIOBase_eof,
2325 PerlIOBase_error,
2326 PerlIOBase_clearerr,
2327 PerlIOBase_setlinebuf,
2328 PerlIOBuf_get_base,
2329 PerlIOBuf_bufsiz,
2330 PerlIOBuf_get_ptr,
2331 PerlIOBuf_get_cnt,
2332 PerlIOBuf_set_ptrcnt,
2333};
2334
2335/*****************************************************************************/
2336/* Coro::Semaphore & Coro::Signal */
2337
2338static SV *
2339coro_waitarray_new (pTHX_ int count)
2340{
2341 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2342 AV *av = newAV ();
2343 SV **ary;
2344
2345 /* unfortunately, building manually saves memory */
2346 Newx (ary, 2, SV *);
2347 AvALLOC (av) = ary;
2348 /*AvARRAY (av) = ary;*/
2349 SvPVX ((SV *)av) = (char *)ary; /* 5.8.8 needs this syntax instead of AvARRAY = ary */
2350 AvMAX (av) = 1;
2351 AvFILLp (av) = 0;
2352 ary [0] = newSViv (count);
2353
2354 return newRV_noinc ((SV *)av);
2355}
2356
2357/* semaphore */
2358
2359static void
2360coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2361{
2362 SV *count_sv = AvARRAY (av)[0];
2363 IV count = SvIVX (count_sv);
2364
2365 count += adjust;
2366 SvIVX (count_sv) = count;
2367
2368 /* now wake up as many waiters as are expected to lock */
2369 while (count > 0 && AvFILLp (av) > 0)
2370 {
2371 SV *cb;
2372
2373 /* swap first two elements so we can shift a waiter */
2374 AvARRAY (av)[0] = AvARRAY (av)[1];
2375 AvARRAY (av)[1] = count_sv;
2376 cb = av_shift (av);
2377
2378 if (SvOBJECT (cb))
2379 {
2380 api_ready (aTHX_ cb);
2381 --count;
2382 }
2383 else if (SvTYPE (cb) == SVt_PVCV)
2384 {
2385 dSP;
2386 PUSHMARK (SP);
2387 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2388 PUTBACK;
2389 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2390 }
2391
2392 SvREFCNT_dec (cb);
2393 }
2394}
2395
2396static void
2397coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2398{
2399 /* call $sem->adjust (0) to possibly wake up some other waiters */
2400 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2401}
2402
2403static int
2404slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2405{
2406 AV *av = (AV *)frame->data;
2407 SV *count_sv = AvARRAY (av)[0];
2408
2409 /* if we are about to throw, don't actually acquire the lock, just throw */
2410 if (CORO_THROW)
2411 return 0;
2412 else if (SvIVX (count_sv) > 0)
2413 {
2414 SvSTATE_current->on_destroy = 0;
2415
2416 if (acquire)
2417 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2418 else
2419 coro_semaphore_adjust (aTHX_ av, 0);
2420
2421 return 0;
2422 }
2423 else
2424 {
2425 int i;
2426 /* if we were woken up but can't down, we look through the whole */
2427 /* waiters list and only add us if we aren't in there already */
2428 /* this avoids some degenerate memory usage cases */
2429
2430 for (i = 1; i <= AvFILLp (av); ++i)
2431 if (AvARRAY (av)[i] == SvRV (coro_current))
2432 return 1;
2433
2434 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2435 return 1;
2436 }
2437}
2438
2439static int
2440slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2441{
2442 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2443}
2444
2445static int
2446slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2447{
2448 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2449}
2450
2451static void
2452slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2453{
2454 AV *av = (AV *)SvRV (arg [0]);
2455
2456 if (SvIVX (AvARRAY (av)[0]) > 0)
2457 {
2458 frame->data = (void *)av;
2459 frame->prepare = prepare_nop;
2460 }
2461 else
2462 {
2463 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2464
2465 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2466 frame->prepare = prepare_schedule;
2467
2468 /* to avoid race conditions when a woken-up coro gets terminated */
2469 /* we arrange for a temporary on_destroy that calls adjust (0) */
2470 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2471 }
2472}
2473
2474static void
2475slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2476{
2477 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2478 frame->check = slf_check_semaphore_down;
2479}
2480
2481static void
2482slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2483{
2484 if (items >= 2)
2485 {
2486 /* callback form */
2487 AV *av = (AV *)SvRV (arg [0]);
2488 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2489
2490 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2491
2492 if (SvIVX (AvARRAY (av)[0]) > 0)
2493 coro_semaphore_adjust (aTHX_ av, 0);
2494
2495 frame->prepare = prepare_nop;
2496 frame->check = slf_check_nop;
2497 }
2498 else
2499 {
2500 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2501 frame->check = slf_check_semaphore_wait;
2502 }
2503}
2504
2505/* signal */
2506
2507static void
2508coro_signal_wake (pTHX_ AV *av, int count)
2509{
2510 SvIVX (AvARRAY (av)[0]) = 0;
2511
2512 /* now signal count waiters */
2513 while (count > 0 && AvFILLp (av) > 0)
2514 {
2515 SV *cb;
2516
2517 /* swap first two elements so we can shift a waiter */
2518 cb = AvARRAY (av)[0];
2519 AvARRAY (av)[0] = AvARRAY (av)[1];
2520 AvARRAY (av)[1] = cb;
2521
2522 cb = av_shift (av);
2523
2524 api_ready (aTHX_ cb);
2525 sv_setiv (cb, 0); /* signal waiter */
2526 SvREFCNT_dec (cb);
2527
2528 --count;
2529 }
2530}
2531
2532static int
2533slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2534{
2535 /* if we are about to throw, also stop waiting */
2536 return SvROK ((SV *)frame->data) && !CORO_THROW;
2537}
2538
2539static void
2540slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2541{
2542 AV *av = (AV *)SvRV (arg [0]);
2543
2544 if (SvIVX (AvARRAY (av)[0]))
2545 {
2546 SvIVX (AvARRAY (av)[0]) = 0;
2547 frame->prepare = prepare_nop;
2548 frame->check = slf_check_nop;
2549 }
2550 else
2551 {
2552 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2553
2554 av_push (av, waiter);
2555
2556 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2557 frame->prepare = prepare_schedule;
2558 frame->check = slf_check_signal_wait;
2559 }
2560}
2561
2562/*****************************************************************************/
2563/* Coro::AIO */
2564
2565#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2566
2567/* helper storage struct */
2568struct io_state
2569{
2570 int errorno;
2571 I32 laststype; /* U16 in 5.10.0 */
2572 int laststatval;
2573 Stat_t statcache;
2574};
2575
2576static void
2577coro_aio_callback (pTHX_ CV *cv)
2578{
2579 dXSARGS;
2580 AV *state = (AV *)GENSUB_ARG;
2581 SV *coro = av_pop (state);
2582 SV *data_sv = newSV (sizeof (struct io_state));
2583
2584 av_extend (state, items - 1);
2585
2586 sv_upgrade (data_sv, SVt_PV);
2587 SvCUR_set (data_sv, sizeof (struct io_state));
2588 SvPOK_only (data_sv);
2589
2590 {
2591 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2592
2593 data->errorno = errno;
2594 data->laststype = PL_laststype;
2595 data->laststatval = PL_laststatval;
2596 data->statcache = PL_statcache;
2597 }
2598
2599 /* now build the result vector out of all the parameters and the data_sv */
2600 {
2601 int i;
2602
2603 for (i = 0; i < items; ++i)
2604 av_push (state, SvREFCNT_inc_NN (ST (i)));
2605 }
2606
2607 av_push (state, data_sv);
2608
2609 api_ready (aTHX_ coro);
2610 SvREFCNT_dec (coro);
2611 SvREFCNT_dec ((AV *)state);
2612}
2613
2614static int
2615slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2616{
2617 AV *state = (AV *)frame->data;
2618
2619 /* if we are about to throw, return early */
2620 /* this does not cancel the aio request, but at least */
2621 /* it quickly returns */
2622 if (CORO_THROW)
2623 return 0;
2624
2625 /* one element that is an RV? repeat! */
2626 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2627 return 1;
2628
2629 /* restore status */
2630 {
2631 SV *data_sv = av_pop (state);
2632 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2633
2634 errno = data->errorno;
2635 PL_laststype = data->laststype;
2636 PL_laststatval = data->laststatval;
2637 PL_statcache = data->statcache;
2638
2639 SvREFCNT_dec (data_sv);
2640 }
2641
2642 /* push result values */
2643 {
2644 dSP;
2645 int i;
2646
2647 EXTEND (SP, AvFILLp (state) + 1);
2648 for (i = 0; i <= AvFILLp (state); ++i)
2649 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2650
2651 PUTBACK;
2652 }
890 2653
891 return 0; 2654 return 0;
892} 2655}
893 2656
894static void 2657static void
895api_ready (SV *coro) 2658slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
896{ 2659{
897 dTHX; 2660 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
898
899 if (SvROK (coro))
900 coro = SvRV (coro);
901
902 LOCK;
903 coro_enq (aTHX_ SvREFCNT_inc (coro));
904 UNLOCK;
905}
906
907static void
908api_schedule (void)
909{
910 dTHX;
911
912 SV *prev, *next;
913
914 LOCK;
915
916 prev = SvRV (GvSV (coro_current)); 2661 SV *coro_hv = SvRV (coro_current);
917 next = coro_deq (aTHX_ PRIO_MIN); 2662 struct coro *coro = SvSTATE_hv (coro_hv);
918 2663
919 if (!next) 2664 /* put our coroutine id on the state arg */
920 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 2665 av_push (state, SvREFCNT_inc_NN (coro_hv));
921 2666
922 /* free this only after the transfer */ 2667 /* first see whether we have a non-zero priority and set it as AIO prio */
923 coro_mortal = prev; 2668 if (coro->prio)
924 SV_CORO (prev, "Coro::schedule"); 2669 {
2670 dSP;
925 2671
926 SvRV (GvSV (coro_current)) = next; 2672 static SV *prio_cv;
2673 static SV *prio_sv;
927 2674
928 SV_CORO (next, "Coro::schedule"); 2675 if (expect_false (!prio_cv))
2676 {
2677 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2678 prio_sv = newSViv (0);
2679 }
929 2680
930 UNLOCK; 2681 PUSHMARK (SP);
2682 sv_setiv (prio_sv, coro->prio);
2683 XPUSHs (prio_sv);
931 2684
932 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 2685 PUTBACK;
933 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 2686 call_sv (prio_cv, G_VOID | G_DISCARD);
934} 2687 }
935 2688
936static void 2689 /* now call the original request */
937api_cede (void) 2690 {
938{ 2691 dSP;
939 dTHX; 2692 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2693 int i;
940 2694
941 LOCK; 2695 PUSHMARK (SP);
942 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
943 UNLOCK;
944 2696
945 api_schedule (); 2697 /* first push all args to the stack */
946} 2698 EXTEND (SP, items + 1);
947 2699
2700 for (i = 0; i < items; ++i)
2701 PUSHs (arg [i]);
2702
2703 /* now push the callback closure */
2704 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2705
2706 /* now call the AIO function - we assume our request is uncancelable */
2707 PUTBACK;
2708 call_sv ((SV *)req, G_VOID | G_DISCARD);
2709 }
2710
2711 /* now that the requets is going, we loop toll we have a result */
2712 frame->data = (void *)state;
2713 frame->prepare = prepare_schedule;
2714 frame->check = slf_check_aio_req;
2715}
2716
2717static void
2718coro_aio_req_xs (pTHX_ CV *cv)
2719{
2720 dXSARGS;
2721
2722 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2723
2724 XSRETURN_EMPTY;
2725}
2726
2727/*****************************************************************************/
2728
948MODULE = Coro::State PACKAGE = Coro::State 2729MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
949 2730
950PROTOTYPES: ENABLE 2731PROTOTYPES: DISABLE
951 2732
952BOOT: 2733BOOT:
953{ /* {} necessary for stoopid perl-5.6.x */ 2734{
954#ifdef USE_ITHREADS 2735#ifdef USE_ITHREADS
955 MUTEX_INIT (&coro_mutex); 2736# if CORO_PTHREAD
2737 coro_thx = PERL_GET_CONTEXT;
2738# endif
956#endif 2739#endif
2740 BOOT_PAGESIZE;
957 2741
958 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2742 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
959 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2743 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2744
2745 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2746 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2747 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2748
2749 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2750 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2751 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2752
960 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2753 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
961 2754
962 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2755 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
963 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2756 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
964 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2757 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
965 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2758 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
966 2759
967 main_mainstack = PL_mainstack; 2760 main_mainstack = PL_mainstack;
2761 main_top_env = PL_top_env;
968 2762
2763 while (main_top_env->je_prev)
2764 main_top_env = main_top_env->je_prev;
2765
2766 {
2767 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2768
2769 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2770 hv_store_ent (PL_custom_op_names, slf,
2771 newSVpv ("coro_slf", 0), 0);
2772
2773 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2774 hv_store_ent (PL_custom_op_descs, slf,
2775 newSVpv ("coro schedule like function", 0), 0);
2776 }
2777
969 coroapi.ver = CORO_API_VERSION; 2778 coroapi.ver = CORO_API_VERSION;
2779 coroapi.rev = CORO_API_REVISION;
2780
970 coroapi.transfer = api_transfer; 2781 coroapi.transfer = api_transfer;
971}
972 2782
973Coro::State 2783 coroapi.sv_state = SvSTATE_;
974_newprocess(args) 2784 coroapi.execute_slf = api_execute_slf;
975 SV * args 2785 coroapi.prepare_nop = prepare_nop;
976 PROTOTYPE: $ 2786 coroapi.prepare_schedule = prepare_schedule;
2787 coroapi.prepare_cede = prepare_cede;
2788 coroapi.prepare_cede_notself = prepare_cede_notself;
2789
2790 {
2791 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2792
2793 if (!svp) croak ("Time::HiRes is required");
2794 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2795
2796 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2797 }
2798
2799 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2800}
2801
2802SV *
2803new (char *klass, ...)
2804 ALIAS:
2805 Coro::new = 1
977 CODE: 2806 CODE:
978 Coro__State coro; 2807{
2808 struct coro *coro;
2809 MAGIC *mg;
2810 HV *hv;
2811 CV *cb;
2812 int i;
979 2813
980 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 2814 if (items > 1)
981 croak ("Coro::State::_newprocess expects an arrayref");
982 2815 {
2816 cb = coro_sv_2cv (aTHX_ ST (1));
2817
2818 if (!ix)
2819 {
2820 if (CvISXSUB (cb))
2821 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2822
2823 if (!CvROOT (cb))
2824 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2825 }
2826 }
2827
983 Newz (0, coro, 1, struct coro); 2828 Newz (0, coro, 1, struct coro);
2829 coro->args = newAV ();
2830 coro->flags = CF_NEW;
984 2831
985 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2832 if (coro_first) coro_first->prev = coro;
986 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 2833 coro->next = coro_first;
987 /*coro->stack = 0;*/ 2834 coro_first = coro;
988 2835
989 /* same as JMPENV_BOOTSTRAP */ 2836 coro->hv = hv = newHV ();
990 /* we might be able to recycle start_env, but safe is safe */ 2837 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
991 /*Zero(&coro->start_env, 1, JMPENV);*/ 2838 mg->mg_flags |= MGf_DUP;
992 coro->start_env.je_ret = -1; 2839 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
993 coro->start_env.je_mustcatch = TRUE;
994 2840
995 RETVAL = coro; 2841 if (items > 1)
2842 {
2843 av_extend (coro->args, items - 1 + ix - 1);
2844
2845 if (ix)
2846 {
2847 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2848 cb = cv_coro_run;
2849 }
2850
2851 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2852
2853 for (i = 2; i < items; i++)
2854 av_push (coro->args, newSVsv (ST (i)));
2855 }
2856}
996 OUTPUT: 2857 OUTPUT:
997 RETVAL 2858 RETVAL
998 2859
999void 2860void
1000transfer(prev, next, flags) 2861transfer (...)
1001 SV *prev
1002 SV *next
1003 int flags
1004 PROTOTYPE: @ 2862 PROTOTYPE: $$
1005 CODE: 2863 CODE:
1006 PUTBACK; 2864 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1007 SV_CORO (next, "Coro::transfer"); 2865
1008 SV_CORO (prev, "Coro::transfer"); 2866bool
1009 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 2867_destroy (SV *coro_sv)
1010 SPAGAIN; 2868 CODE:
2869 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2870 OUTPUT:
2871 RETVAL
1011 2872
1012void 2873void
1013DESTROY(coro)
1014 Coro::State coro
1015 CODE:
1016
1017 if (coro->mainstack && coro->mainstack != main_mainstack)
1018 {
1019 struct coro temp;
1020
1021 PUTBACK;
1022 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1023 LOAD (aTHX_ coro);
1024 SPAGAIN;
1025
1026 destroy_stacks (aTHX);
1027
1028 LOAD ((&temp)); /* this will get rid of defsv etc.. */
1029 SPAGAIN;
1030
1031 coro->mainstack = 0;
1032 }
1033
1034 deallocate_stack (coro);
1035 SvREFCNT_dec (coro->args);
1036 Safefree (coro);
1037
1038void
1039_exit(code) 2874_exit (int code)
1040 int code
1041 PROTOTYPE: $ 2875 PROTOTYPE: $
1042 CODE: 2876 CODE:
1043 _exit (code); 2877 _exit (code);
1044 2878
1045MODULE = Coro::State PACKAGE = Coro::Cont 2879int
2880cctx_stacksize (int new_stacksize = 0)
2881 PROTOTYPE: ;$
2882 CODE:
2883 RETVAL = cctx_stacksize;
2884 if (new_stacksize)
2885 {
2886 cctx_stacksize = new_stacksize;
2887 ++cctx_gen;
2888 }
2889 OUTPUT:
2890 RETVAL
1046 2891
1047# this is slightly dirty (should expose a c-level api) 2892int
2893cctx_max_idle (int max_idle = 0)
2894 PROTOTYPE: ;$
2895 CODE:
2896 RETVAL = cctx_max_idle;
2897 if (max_idle > 1)
2898 cctx_max_idle = max_idle;
2899 OUTPUT:
2900 RETVAL
2901
2902int
2903cctx_count ()
2904 PROTOTYPE:
2905 CODE:
2906 RETVAL = cctx_count;
2907 OUTPUT:
2908 RETVAL
2909
2910int
2911cctx_idle ()
2912 PROTOTYPE:
2913 CODE:
2914 RETVAL = cctx_idle;
2915 OUTPUT:
2916 RETVAL
1048 2917
1049void 2918void
1050yield(...) 2919list ()
1051 PROTOTYPE: @ 2920 PROTOTYPE:
2921 PPCODE:
2922{
2923 struct coro *coro;
2924 for (coro = coro_first; coro; coro = coro->next)
2925 if (coro->hv)
2926 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2927}
2928
2929void
2930call (Coro::State coro, SV *coderef)
2931 ALIAS:
2932 eval = 1
2933 CODE:
2934{
2935 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2936 {
2937 struct coro temp;
2938
2939 if (!(coro->flags & CF_RUNNING))
2940 {
2941 PUTBACK;
2942 save_perl (aTHX_ &temp);
2943 load_perl (aTHX_ coro);
2944 }
2945
2946 {
2947 dSP;
2948 ENTER;
2949 SAVETMPS;
2950 PUTBACK;
2951 PUSHSTACK;
2952 PUSHMARK (SP);
2953
2954 if (ix)
2955 eval_sv (coderef, 0);
2956 else
2957 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2958
2959 POPSTACK;
2960 SPAGAIN;
2961 FREETMPS;
2962 LEAVE;
2963 PUTBACK;
2964 }
2965
2966 if (!(coro->flags & CF_RUNNING))
2967 {
2968 save_perl (aTHX_ coro);
2969 load_perl (aTHX_ &temp);
2970 SPAGAIN;
2971 }
2972 }
2973}
2974
2975SV *
2976is_ready (Coro::State coro)
2977 PROTOTYPE: $
2978 ALIAS:
2979 is_ready = CF_READY
2980 is_running = CF_RUNNING
2981 is_new = CF_NEW
2982 is_destroyed = CF_DESTROYED
2983 CODE:
2984 RETVAL = boolSV (coro->flags & ix);
2985 OUTPUT:
2986 RETVAL
2987
2988void
2989throw (Coro::State self, SV *throw = &PL_sv_undef)
2990 PROTOTYPE: $;$
1052 CODE: 2991 CODE:
1053 static SV *returnstk; 2992{
1054 SV *sv; 2993 struct coro *current = SvSTATE_current;
1055 AV *defav = GvAV (PL_defgv); 2994 SV **throwp = self == current ? &CORO_THROW : &self->except;
1056 struct coro *prev, *next;
1057
1058 if (!returnstk)
1059 returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1060
1061 /* set up @_ -- ugly */
1062 av_clear (defav);
1063 av_fill (defav, items - 1);
1064 while (items--)
1065 av_store (defav, items, SvREFCNT_inc (ST(items)));
1066
1067 SvGETMAGIC (returnstk); /* isn't documentation wrong for mg_get? */
1068 sv = av_pop ((AV *)SvRV (returnstk));
1069 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1070 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1071 SvREFCNT_dec (sv); 2995 SvREFCNT_dec (*throwp);
2996 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2997}
1072 2998
1073 transfer (aTHX_ prev, next, 0); 2999void
3000api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3001 PROTOTYPE: $;$
3002 C_ARGS: aTHX_ coro, flags
3003
3004SV *
3005has_cctx (Coro::State coro)
3006 PROTOTYPE: $
3007 CODE:
3008 RETVAL = boolSV (!!coro->cctx);
3009 OUTPUT:
3010 RETVAL
3011
3012int
3013is_traced (Coro::State coro)
3014 PROTOTYPE: $
3015 CODE:
3016 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3017 OUTPUT:
3018 RETVAL
3019
3020UV
3021rss (Coro::State coro)
3022 PROTOTYPE: $
3023 ALIAS:
3024 usecount = 1
3025 CODE:
3026 switch (ix)
3027 {
3028 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3029 case 1: RETVAL = coro->usecount; break;
3030 }
3031 OUTPUT:
3032 RETVAL
3033
3034void
3035force_cctx ()
3036 PROTOTYPE:
3037 CODE:
3038 SvSTATE_current->cctx->idle_sp = 0;
3039
3040void
3041swap_defsv (Coro::State self)
3042 PROTOTYPE: $
3043 ALIAS:
3044 swap_defav = 1
3045 CODE:
3046 if (!self->slot)
3047 croak ("cannot swap state with coroutine that has no saved state,");
3048 else
3049 {
3050 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3051 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3052
3053 SV *tmp = *src; *src = *dst; *dst = tmp;
3054 }
3055
1074 3056
1075MODULE = Coro::State PACKAGE = Coro 3057MODULE = Coro::State PACKAGE = Coro
1076 3058
1077# this is slightly dirty (should expose a c-level api)
1078
1079BOOT: 3059BOOT:
1080{ 3060{
1081 int i; 3061 int i;
3062
3063 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3064 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3065 cv_coro_run = get_cv ( "Coro::_terminate", GV_ADD);
3066 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3067 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3068 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3069 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3070 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3071
3072 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3073 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3074 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3075 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3076
1082 HV *stash = gv_stashpv ("Coro", TRUE); 3077 coro_stash = gv_stashpv ("Coro", TRUE);
1083 3078
1084 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3079 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1085 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3080 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1086 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3081 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1087 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3082 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1088 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3083 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1089 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3084 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1090
1091 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1092 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1093 3085
1094 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 3086 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1095 coro_ready[i] = newAV (); 3087 coro_ready[i] = newAV ();
1096 3088
1097 { 3089 {
1098 SV *sv = perl_get_sv("Coro::API", 1); 3090 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1099 3091
1100 coroapi.schedule = api_schedule; 3092 coroapi.schedule = api_schedule;
3093 coroapi.schedule_to = api_schedule_to;
1101 coroapi.cede = api_cede; 3094 coroapi.cede = api_cede;
3095 coroapi.cede_notself = api_cede_notself;
1102 coroapi.ready = api_ready; 3096 coroapi.ready = api_ready;
3097 coroapi.is_ready = api_is_ready;
1103 coroapi.nready = &coro_nready; 3098 coroapi.nready = coro_nready;
1104 coroapi.current = coro_current; 3099 coroapi.current = coro_current;
1105 3100
1106 GCoroAPI = &coroapi; 3101 /*GCoroAPI = &coroapi;*/
1107 sv_setiv(sv, (IV)&coroapi); 3102 sv_setiv (sv, (IV)&coroapi);
1108 SvREADONLY_on(sv); 3103 SvREADONLY_on (sv);
1109 } 3104 }
1110} 3105}
1111 3106
1112#if !PERL_MICRO
1113
1114void 3107void
1115ready(self) 3108terminate (...)
1116 SV * self 3109 CODE:
3110 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3111
3112void
3113schedule (...)
3114 CODE:
3115 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3116
3117void
3118schedule_to (...)
3119 CODE:
3120 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3121
3122void
3123cede_to (...)
3124 CODE:
3125 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3126
3127void
3128cede (...)
3129 CODE:
3130 CORO_EXECUTE_SLF_XS (slf_init_cede);
3131
3132void
3133cede_notself (...)
3134 CODE:
3135 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3136
3137void
3138_cancel (Coro::State self)
3139 CODE:
3140 coro_state_destroy (aTHX_ self);
3141 coro_call_on_destroy (aTHX_ self);
3142
3143void
3144_set_current (SV *current)
1117 PROTOTYPE: $ 3145 PROTOTYPE: $
1118 CODE: 3146 CODE:
1119 api_ready (self); 3147 SvREFCNT_dec (SvRV (coro_current));
3148 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1120 3149
1121#endif 3150void
3151_set_readyhook (SV *hook)
3152 PROTOTYPE: $
3153 CODE:
3154 SvREFCNT_dec (coro_readyhook);
3155 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1122 3156
1123int 3157int
3158prio (Coro::State coro, int newprio = 0)
3159 PROTOTYPE: $;$
3160 ALIAS:
3161 nice = 1
3162 CODE:
3163{
3164 RETVAL = coro->prio;
3165
3166 if (items > 1)
3167 {
3168 if (ix)
3169 newprio = coro->prio - newprio;
3170
3171 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
3172 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
3173
3174 coro->prio = newprio;
3175 }
3176}
3177 OUTPUT:
3178 RETVAL
3179
3180SV *
3181ready (SV *self)
3182 PROTOTYPE: $
3183 CODE:
3184 RETVAL = boolSV (api_ready (aTHX_ self));
3185 OUTPUT:
3186 RETVAL
3187
3188int
1124nready(...) 3189nready (...)
1125 PROTOTYPE: 3190 PROTOTYPE:
1126 CODE: 3191 CODE:
1127 RETVAL = coro_nready; 3192 RETVAL = coro_nready;
1128 OUTPUT: 3193 OUTPUT:
1129 RETVAL 3194 RETVAL
1130 3195
1131void 3196void
1132schedule(...) 3197_pool_handler (...)
1133 PROTOTYPE:
1134 CODE: 3198 CODE:
1135 api_schedule (); 3199 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1136 3200
1137void 3201void
1138cede(...) 3202async_pool (SV *cv, ...)
1139 PROTOTYPE: 3203 PROTOTYPE: &@
3204 PPCODE:
3205{
3206 HV *hv = (HV *)av_pop (av_async_pool);
3207 AV *av = newAV ();
3208 SV *cb = ST (0);
3209 int i;
3210
3211 av_extend (av, items - 2);
3212 for (i = 1; i < items; ++i)
3213 av_push (av, SvREFCNT_inc_NN (ST (i)));
3214
3215 if ((SV *)hv == &PL_sv_undef)
3216 {
3217 PUSHMARK (SP);
3218 EXTEND (SP, 2);
3219 PUSHs (sv_Coro);
3220 PUSHs ((SV *)cv_pool_handler);
3221 PUTBACK;
3222 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3223 SPAGAIN;
3224
3225 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3226 }
3227
3228 {
3229 struct coro *coro = SvSTATE_hv (hv);
3230
3231 assert (!coro->invoke_cb);
3232 assert (!coro->invoke_av);
3233 coro->invoke_cb = SvREFCNT_inc (cb);
3234 coro->invoke_av = av;
3235 }
3236
3237 api_ready (aTHX_ (SV *)hv);
3238
3239 if (GIMME_V != G_VOID)
3240 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3241 else
3242 SvREFCNT_dec (hv);
3243}
3244
3245SV *
3246rouse_cb ()
3247 PROTOTYPE:
1140 CODE: 3248 CODE:
3249 RETVAL = coro_new_rouse_cb (aTHX);
3250 OUTPUT:
3251 RETVAL
3252
3253void
3254rouse_wait (...)
3255 PROTOTYPE: ;$
3256 PPCODE:
3257 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3258
3259
3260MODULE = Coro::State PACKAGE = PerlIO::cede
3261
3262BOOT:
3263 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3264
3265
3266MODULE = Coro::State PACKAGE = Coro::Semaphore
3267
3268SV *
3269new (SV *klass, SV *count = 0)
3270 CODE:
3271 RETVAL = sv_bless (
3272 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3273 GvSTASH (CvGV (cv))
3274 );
3275 OUTPUT:
3276 RETVAL
3277
3278# helper for Coro::Channel
3279SV *
3280_alloc (int count)
3281 CODE:
3282 RETVAL = coro_waitarray_new (aTHX_ count);
3283 OUTPUT:
3284 RETVAL
3285
3286SV *
3287count (SV *self)
3288 CODE:
3289 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3290 OUTPUT:
3291 RETVAL
3292
3293void
3294up (SV *self, int adjust = 1)
3295 ALIAS:
3296 adjust = 1
3297 CODE:
3298 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3299
3300void
3301down (...)
3302 CODE:
3303 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3304
3305void
3306wait (...)
3307 CODE:
3308 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3309
3310void
3311try (SV *self)
3312 PPCODE:
3313{
3314 AV *av = (AV *)SvRV (self);
3315 SV *count_sv = AvARRAY (av)[0];
3316 IV count = SvIVX (count_sv);
3317
3318 if (count > 0)
3319 {
3320 --count;
3321 SvIVX (count_sv) = count;
3322 XSRETURN_YES;
3323 }
3324 else
3325 XSRETURN_NO;
3326}
3327
3328void
3329waiters (SV *self)
3330 PPCODE:
3331{
3332 AV *av = (AV *)SvRV (self);
3333 int wcount = AvFILLp (av) + 1 - 1;
3334
3335 if (GIMME_V == G_SCALAR)
3336 XPUSHs (sv_2mortal (newSViv (wcount)));
3337 else
3338 {
3339 int i;
3340 EXTEND (SP, wcount);
3341 for (i = 1; i <= wcount; ++i)
3342 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3343 }
3344}
3345
3346MODULE = Coro::State PACKAGE = Coro::Signal
3347
3348SV *
3349new (SV *klass)
3350 CODE:
3351 RETVAL = sv_bless (
3352 coro_waitarray_new (aTHX_ 0),
3353 GvSTASH (CvGV (cv))
3354 );
3355 OUTPUT:
3356 RETVAL
3357
3358void
3359wait (...)
3360 CODE:
3361 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3362
3363void
3364broadcast (SV *self)
3365 CODE:
3366{
3367 AV *av = (AV *)SvRV (self);
3368 coro_signal_wake (aTHX_ av, AvFILLp (av));
3369}
3370
3371void
3372send (SV *self)
3373 CODE:
3374{
3375 AV *av = (AV *)SvRV (self);
3376
3377 if (AvFILLp (av))
3378 coro_signal_wake (aTHX_ av, 1);
3379 else
3380 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3381}
3382
3383IV
3384awaited (SV *self)
3385 CODE:
3386 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3387 OUTPUT:
3388 RETVAL
3389
3390
3391MODULE = Coro::State PACKAGE = Coro::AnyEvent
3392
3393BOOT:
3394 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3395
3396void
3397_schedule (...)
3398 CODE:
3399{
3400 static int incede;
3401
1141 api_cede (); 3402 api_cede_notself (aTHX);
1142 3403
3404 ++incede;
3405 while (coro_nready >= incede && api_cede (aTHX))
3406 ;
3407
3408 sv_setsv (sv_activity, &PL_sv_undef);
3409 if (coro_nready >= incede)
3410 {
3411 PUSHMARK (SP);
3412 PUTBACK;
3413 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3414 }
3415
3416 --incede;
3417}
3418
3419
3420MODULE = Coro::State PACKAGE = Coro::AIO
3421
3422void
3423_register (char *target, char *proto, SV *req)
3424 CODE:
3425{
3426 CV *req_cv = coro_sv_2cv (aTHX_ req);
3427 /* newXSproto doesn't return the CV on 5.8 */
3428 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3429 sv_setpv ((SV *)slf_cv, proto);
3430 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3431}
3432

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