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Comparing Coro/Coro/State.xs (file contents):
Revision 1.53 by pcg, Sat Feb 14 12:39:41 2004 UTC vs.
Revision 1.303 by root, Wed Nov 19 05:52:42 2008 UTC

1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
5
1#include "EXTERN.h" 6#include "EXTERN.h"
2#include "perl.h" 7#include "perl.h"
3#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
4 10
5#include "patchlevel.h" 11#include "patchlevel.h"
6 12
7#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) && PERLSUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
8# ifndef PL_ppaddr 63# ifndef PL_ppaddr
9# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
10# endif 65# endif
11# ifndef call_sv 66# ifndef call_sv
12# define call_sv perl_call_sv 67# define call_sv perl_call_sv
… …
23# ifndef IS_PADCONST 78# ifndef IS_PADCONST
24# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
25# endif 80# endif
26#endif 81#endif
27 82
28#include "libcoro/coro.c" 83/* 5.11 */
29 84#ifndef CxHASARGS
30#include <signal.h> 85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
31
32#ifdef HAVE_MMAP
33# include <unistd.h>
34# include <sys/mman.h>
35# ifndef MAP_ANONYMOUS
36# ifdef MAP_ANON
37# define MAP_ANONYMOUS MAP_ANON
38# else
39# undef HAVE_MMAP
40# 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
104/* 5.8.7 */
105#ifndef SvRV_set
106# define SvRV_set(s,v) SvRV(s) = (v)
107#endif
108
109#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
110# undef CORO_STACKGUARD
111#endif
112
113#ifndef CORO_STACKGUARD
114# define CORO_STACKGUARD 0
115#endif
116
117/* prefer perl internal functions over our own? */
118#ifndef CORO_PREFER_PERL_FUNCTIONS
119# define CORO_PREFER_PERL_FUNCTIONS 0
120#endif
121
122/* The next macros try to return the current stack pointer, in an as
123 * portable way as possible. */
124#if __GNUC__ >= 4
125# define dSTACKLEVEL int stacklevel_dummy
126# define STACKLEVEL __builtin_frame_address (0)
127#else
128# define dSTACKLEVEL volatile void *stacklevel
129# define STACKLEVEL ((void *)&stacklevel)
130#endif
131
132#define IN_DESTRUCT (PL_main_cv == Nullcv)
133
134#if __GNUC__ >= 3
135# define attribute(x) __attribute__(x)
136# define expect(expr,value) __builtin_expect ((expr),(value))
137# define INLINE static inline
138#else
139# define attribute(x)
140# define expect(expr,value) (expr)
141# define INLINE static
142#endif
143
144#define expect_false(expr) expect ((expr) != 0, 0)
145#define expect_true(expr) expect ((expr) != 0, 1)
146
147#define NOINLINE attribute ((noinline))
148
149#include "CoroAPI.h"
150#define GCoroAPI (&coroapi) /* very sneaky */
151
152#ifdef USE_ITHREADS
153# if CORO_PTHREAD
154static void *coro_thx;
41# endif 155# endif
42#endif 156#endif
43 157
44#define SUB_INIT "Coro::State::initialize" 158static double (*nvtime)(); /* so why doesn't it take void? */
45#define UCORO_STATE "_coro_state"
46 159
47/* The next macro should declare a variable stacklevel that contains and approximation 160/* we hijack an hopefully unused CV flag for our purposes */
48 * to the current C stack pointer. Its property is that it changes with each call 161#define CVf_SLF 0x4000
49 * and should be unique. */ 162static OP *pp_slf (pTHX);
50#define dSTACKLEVEL void *stacklevel = &stacklevel
51 163
52#define IN_DESTRUCT (PL_main_cv == Nullcv) 164static U32 cctx_gen;
53 165static size_t cctx_stacksize = CORO_STACKSIZE;
54#define labs(l) ((l) >= 0 ? (l) : -(l))
55
56#include "CoroAPI.h"
57
58static struct CoroAPI coroapi; 166static struct CoroAPI coroapi;
167static AV *main_mainstack; /* used to differentiate between $main and others */
168static JMPENV *main_top_env;
169static HV *coro_state_stash, *coro_stash;
170static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
59 171
60/* this is actually not only the c stack but also c registers etc... */ 172static GV *irsgv; /* $/ */
173static GV *stdoutgv; /* *STDOUT */
174static SV *rv_diehook;
175static SV *rv_warnhook;
176static HV *hv_sig; /* %SIG */
177
178/* async_pool helper stuff */
179static SV *sv_pool_rss;
180static SV *sv_pool_size;
181static AV *av_async_pool;
182
183/* Coro::AnyEvent */
184static SV *sv_activity;
185
186static struct coro_cctx *cctx_first;
187static int cctx_count, cctx_idle;
188
189enum {
190 CC_MAPPED = 0x01,
191 CC_NOREUSE = 0x02, /* throw this away after tracing */
192 CC_TRACE = 0x04,
193 CC_TRACE_SUB = 0x08, /* trace sub calls */
194 CC_TRACE_LINE = 0x10, /* trace each statement */
195 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
196};
197
198/* this is a structure representing a c-level coroutine */
61typedef struct { 199typedef struct coro_cctx
62 int refcnt; /* pointer reference counter */ 200{
63 int usecnt; /* shared by how many coroutines */ 201 struct coro_cctx *next;
64 int gencnt; /* generation counter */
65 202
203 /* the stack */
204 void *sptr;
205 size_t ssize;
206
207 /* cpu state */
208 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
209 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
210 JMPENV *top_env;
66 coro_context cctx; 211 coro_context cctx;
67 212
68 void *sptr; 213 U32 gen;
69 long ssize; /* positive == mmap, otherwise malloc */ 214#if CORO_USE_VALGRIND
70} coro_stack; 215 int valgrind_id;
216#endif
217 unsigned char flags;
218} coro_cctx;
71 219
220enum {
221 CF_RUNNING = 0x0001, /* coroutine is running */
222 CF_READY = 0x0002, /* coroutine is ready */
223 CF_NEW = 0x0004, /* has never been switched to */
224 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
225};
226
227/* the structure where most of the perl state is stored, overlaid on the cxstack */
228typedef struct
229{
230 SV *defsv;
231 AV *defav;
232 SV *errsv;
233 SV *irsgv;
234#define VAR(name,type) type name;
235# include "state.h"
236#undef VAR
237} perl_slots;
238
239#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
240
241/* this is a structure representing a perl-level coroutine */
72struct coro { 242struct coro {
73 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 243 /* the C coroutine allocated to this perl coroutine, if any */
74 JMPENV start_env; 244 coro_cctx *cctx;
75 245
76 /* the optional C context */ 246 /* state data */
77 coro_stack *stack; 247 struct CoroSLF slf_frame; /* saved slf frame */
78 void *cursp;
79 int gencnt;
80
81 /* optionally saved, might be zero */
82 AV *defav;
83 SV *defsv;
84 SV *errsv;
85
86 /* saved global state not related to stacks */
87 U8 dowarn;
88 I32 in_eval;
89
90 /* the stacks and related info (callchain etc..) */
91 PERL_SI *curstackinfo;
92 AV *curstack;
93 AV *mainstack; 248 AV *mainstack;
94 SV **stack_sp; 249 perl_slots *slot; /* basically the saved sp */
95 OP *op;
96 SV **curpad;
97 AV *comppad;
98 SV **stack_base;
99 SV **stack_max;
100 SV **tmps_stack;
101 I32 tmps_floor;
102 I32 tmps_ix;
103 I32 tmps_max;
104 I32 *markstack;
105 I32 *markstack_ptr;
106 I32 *markstack_max;
107 I32 *scopestack;
108 I32 scopestack_ix;
109 I32 scopestack_max;
110 ANY *savestack;
111 I32 savestack_ix;
112 I32 savestack_max;
113 OP **retstack;
114 I32 retstack_ix;
115 I32 retstack_max;
116 COP *curcop;
117 JMPENV *top_env;
118 250
119 /* data associated with this coroutine (initial args) */ 251 AV *args; /* data associated with this coroutine (initial args) */
120 AV *args; 252 int refcnt; /* coroutines are refcounted, yes */
253 int flags; /* CF_ flags */
254 HV *hv; /* the perl hash associated with this coro, if any */
255 void (*on_destroy)(pTHX_ struct coro *coro);
256
257 /* statistics */
258 int usecount; /* number of transfers to this coro */
259
260 /* coro process data */
261 int prio;
262 SV *except; /* exception to be thrown */
263 SV *rouse_cb;
264
265 /* async_pool */
266 SV *saved_deffh;
267
268 /* linked list */
269 struct coro *next, *prev;
121}; 270};
122 271
123typedef struct coro *Coro__State; 272typedef struct coro *Coro__State;
124typedef struct coro *Coro__State_or_hashref; 273typedef struct coro *Coro__State_or_hashref;
125 274
126static AV *main_mainstack; /* used to differentiate between $main and others */ 275/* the following variables are effectively part of the perl context */
127static HV *coro_state_stash; 276/* and get copied between struct coro and these variables */
128static SV *ucoro_state_sv; 277/* the mainr easonw e don't support windows process emulation */
129static U32 ucoro_state_hash; 278static struct CoroSLF slf_frame; /* the current slf frame */
130static HV *padlist_cache;
131static SV *coro_mortal; /* will be freed after next transfer */
132 279
133/* mostly copied from op.c:cv_clone2 */ 280/** Coro ********************************************************************/
134STATIC AV * 281
135clone_padlist (AV *protopadlist) 282#define PRIO_MAX 3
283#define PRIO_HIGH 1
284#define PRIO_NORMAL 0
285#define PRIO_LOW -1
286#define PRIO_IDLE -3
287#define PRIO_MIN -4
288
289/* for Coro.pm */
290static SV *coro_current;
291static SV *coro_readyhook;
292static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
293static struct coro *coro_first;
294#define coro_nready coroapi.nready
295
296/** lowlevel stuff **********************************************************/
297
298static SV *
299coro_get_sv (pTHX_ const char *name, int create)
136{ 300{
137 AV *av; 301#if PERL_VERSION_ATLEAST (5,10,0)
138 I32 ix; 302 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
139 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 303 get_sv (name, create);
140 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 304#endif
141 SV **pname = AvARRAY (protopad_name); 305 return get_sv (name, create);
142 SV **ppad = AvARRAY (protopad); 306}
143 I32 fname = AvFILLp (protopad_name); 307
144 I32 fpad = AvFILLp (protopad); 308static AV *
309coro_get_av (pTHX_ const char *name, int create)
310{
311#if PERL_VERSION_ATLEAST (5,10,0)
312 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
313 get_av (name, create);
314#endif
315 return get_av (name, create);
316}
317
318static HV *
319coro_get_hv (pTHX_ const char *name, int create)
320{
321#if PERL_VERSION_ATLEAST (5,10,0)
322 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
323 get_hv (name, create);
324#endif
325 return get_hv (name, create);
326}
327
328static AV *
329coro_clone_padlist (pTHX_ CV *cv)
330{
331 AV *padlist = CvPADLIST (cv);
145 AV *newpadlist, *newpad_name, *newpad; 332 AV *newpadlist, *newpad;
146 SV **npad;
147
148 newpad_name = newAV ();
149 for (ix = fname; ix >= 0; ix--)
150 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
151
152 newpad = newAV ();
153 av_fill (newpad, AvFILLp (protopad));
154 npad = AvARRAY (newpad);
155 333
156 newpadlist = newAV (); 334 newpadlist = newAV ();
157 AvREAL_off (newpadlist); 335 AvREAL_off (newpadlist);
158 av_store (newpadlist, 0, (SV *) newpad_name); 336#if PERL_VERSION_ATLEAST (5,10,0)
337 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
338#else
339 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
340#endif
341 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
342 --AvFILLp (padlist);
343
344 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
159 av_store (newpadlist, 1, (SV *) newpad); 345 av_store (newpadlist, 1, (SV *)newpad);
160
161 av = newAV (); /* will be @_ */
162 av_extend (av, 0);
163 av_store (newpad, 0, (SV *) av);
164 AvFLAGS (av) = AVf_REIFY;
165
166 for (ix = fpad; ix > 0; ix--)
167 {
168 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
169 if (namesv && namesv != &PL_sv_undef)
170 {
171 char *name = SvPVX (namesv); /* XXX */
172 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
173 { /* lexical from outside? */
174 npad[ix] = SvREFCNT_inc (ppad[ix]);
175 }
176 else
177 { /* our own lexical */
178 SV *sv;
179 if (*name == '&')
180 sv = SvREFCNT_inc (ppad[ix]);
181 else if (*name == '@')
182 sv = (SV *) newAV ();
183 else if (*name == '%')
184 sv = (SV *) newHV ();
185 else
186 sv = NEWSV (0, 0);
187#ifdef SvPADBUSY
188 if (!SvPADBUSY (sv))
189#endif
190 SvPADMY_on (sv);
191 npad[ix] = sv;
192 }
193 }
194 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
195 {
196 npad[ix] = SvREFCNT_inc (ppad[ix]);
197 }
198 else
199 {
200 SV *sv = NEWSV (0, 0);
201 SvPADTMP_on (sv);
202 npad[ix] = sv;
203 }
204 }
205
206#if 0 /* return -ENOTUNDERSTOOD */
207 /* Now that vars are all in place, clone nested closures. */
208
209 for (ix = fpad; ix > 0; ix--) {
210 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
211 if (namesv
212 && namesv != &PL_sv_undef
213 && !(SvFLAGS(namesv) & SVf_FAKE)
214 && *SvPVX(namesv) == '&'
215 && CvCLONE(ppad[ix]))
216 {
217 CV *kid = cv_clone((CV*)ppad[ix]);
218 SvREFCNT_dec(ppad[ix]);
219 CvCLONE_on(kid);
220 SvPADMY_on(kid);
221 npad[ix] = (SV*)kid;
222 }
223 }
224#endif
225 346
226 return newpadlist; 347 return newpadlist;
227} 348}
228 349
229STATIC void 350static void
230free_padlist (AV *padlist) 351free_padlist (pTHX_ AV *padlist)
231{ 352{
232 /* may be during global destruction */ 353 /* may be during global destruction */
233 if (SvREFCNT (padlist)) 354 if (SvREFCNT (padlist))
234 { 355 {
235 I32 i = AvFILLp (padlist); 356 I32 i = AvFILLp (padlist);
… …
248 369
249 SvREFCNT_dec ((SV*)padlist); 370 SvREFCNT_dec ((SV*)padlist);
250 } 371 }
251} 372}
252 373
253STATIC int 374static int
254coro_cv_free (SV *sv, MAGIC *mg) 375coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
255{ 376{
256 AV *padlist; 377 AV *padlist;
257 AV *av = (AV *)mg->mg_obj; 378 AV *av = (AV *)mg->mg_obj;
258 379
259 /* casting is fun. */ 380 /* casting is fun. */
260 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 381 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
261 free_padlist (padlist); 382 free_padlist (aTHX_ padlist);
262}
263 383
384 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
385
386 return 0;
387}
388
389#define CORO_MAGIC_type_cv 26
264#define PERL_MAGIC_coro PERL_MAGIC_ext 390#define CORO_MAGIC_type_state PERL_MAGIC_ext
265 391
266static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 392static MGVTBL coro_cv_vtbl = {
393 0, 0, 0, 0,
394 coro_cv_free
395};
396
397#define CORO_MAGIC_NN(sv, type) \
398 (expect_true (SvMAGIC (sv)->mg_type == type) \
399 ? SvMAGIC (sv) \
400 : mg_find (sv, type))
401
402#define CORO_MAGIC(sv, type) \
403 (expect_true (SvMAGIC (sv)) \
404 ? CORO_MAGIC_NN (sv, type) \
405 : 0)
406
407#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
408#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
409
410INLINE struct coro *
411SvSTATE_ (pTHX_ SV *coro)
412{
413 HV *stash;
414 MAGIC *mg;
415
416 if (SvROK (coro))
417 coro = SvRV (coro);
418
419 if (expect_false (SvTYPE (coro) != SVt_PVHV))
420 croak ("Coro::State object required");
421
422 stash = SvSTASH (coro);
423 if (expect_false (stash != coro_stash && stash != coro_state_stash))
424 {
425 /* very slow, but rare, check */
426 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
427 croak ("Coro::State object required");
428 }
429
430 mg = CORO_MAGIC_state (coro);
431 return (struct coro *)mg->mg_ptr;
432}
433
434#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
435
436/* faster than SvSTATE, but expects a coroutine hv */
437#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
438#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
267 439
268/* the next two functions merely cache the padlists */ 440/* the next two functions merely cache the padlists */
269STATIC void 441static void
270get_padlist (CV *cv) 442get_padlist (pTHX_ CV *cv)
271{ 443{
272 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 444 MAGIC *mg = CORO_MAGIC_cv (cv);
445 AV *av;
273 446
274 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 447 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
275 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 448 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
276 else 449 else
277 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
278}
279
280STATIC void
281put_padlist (CV *cv)
282{
283 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
284
285 if (!mg)
286 { 450 {
287 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0); 451#if CORO_PREFER_PERL_FUNCTIONS
288 mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 452 /* this is probably cleaner? but also slower! */
289 mg->mg_virtual = &vtbl_coro; 453 /* in practise, it seems to be less stable */
290 mg->mg_obj = (SV *)newAV (); 454 CV *cp = Perl_cv_clone (cv);
455 CvPADLIST (cv) = CvPADLIST (cp);
456 CvPADLIST (cp) = 0;
457 SvREFCNT_dec (cp);
458#else
459 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
460#endif
291 } 461 }
292
293 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));
294} 462}
295 463
296#define SB do {
297#define SE } while (0)
298
299#define LOAD(state) load_state(aTHX_ (state));
300#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
301
302#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
303
304static void 464static void
465put_padlist (pTHX_ CV *cv)
466{
467 MAGIC *mg = CORO_MAGIC_cv (cv);
468 AV *av;
469
470 if (expect_false (!mg))
471 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
472
473 av = (AV *)mg->mg_obj;
474
475 if (expect_false (AvFILLp (av) >= AvMAX (av)))
476 av_extend (av, AvMAX (av) + 1);
477
478 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
479}
480
481/** load & save, init *******************************************************/
482
483static void
305load_state(pTHX_ Coro__State c) 484load_perl (pTHX_ Coro__State c)
306{ 485{
307 PL_dowarn = c->dowarn; 486 perl_slots *slot = c->slot;
308 PL_in_eval = c->in_eval; 487 c->slot = 0;
309 488
310 PL_curstackinfo = c->curstackinfo;
311 PL_curstack = c->curstack;
312 PL_mainstack = c->mainstack; 489 PL_mainstack = c->mainstack;
313 PL_stack_sp = c->stack_sp;
314 PL_op = c->op;
315 PL_curpad = c->curpad;
316 PL_comppad = c->comppad;
317 PL_stack_base = c->stack_base;
318 PL_stack_max = c->stack_max;
319 PL_tmps_stack = c->tmps_stack;
320 PL_tmps_floor = c->tmps_floor;
321 PL_tmps_ix = c->tmps_ix;
322 PL_tmps_max = c->tmps_max;
323 PL_markstack = c->markstack;
324 PL_markstack_ptr = c->markstack_ptr;
325 PL_markstack_max = c->markstack_max;
326 PL_scopestack = c->scopestack;
327 PL_scopestack_ix = c->scopestack_ix;
328 PL_scopestack_max = c->scopestack_max;
329 PL_savestack = c->savestack;
330 PL_savestack_ix = c->savestack_ix;
331 PL_savestack_max = c->savestack_max;
332 PL_retstack = c->retstack;
333 PL_retstack_ix = c->retstack_ix;
334 PL_retstack_max = c->retstack_max;
335 PL_curcop = c->curcop;
336 PL_top_env = c->top_env;
337 490
338 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 491 GvSV (PL_defgv) = slot->defsv;
339 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 492 GvAV (PL_defgv) = slot->defav;
340 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 493 GvSV (PL_errgv) = slot->errsv;
494 GvSV (irsgv) = slot->irsgv;
495
496 #define VAR(name,type) PL_ ## name = slot->name;
497 # include "state.h"
498 #undef VAR
341 499
342 { 500 {
343 dSP; 501 dSP;
502
344 CV *cv; 503 CV *cv;
345 504
346 /* now do the ugly restore mess */ 505 /* now do the ugly restore mess */
347 while ((cv = (CV *)POPs)) 506 while (expect_true (cv = (CV *)POPs))
348 { 507 {
349 AV *padlist = (AV *)POPs;
350
351 if (padlist)
352 {
353 put_padlist (cv); /* mark this padlist as available */ 508 put_padlist (aTHX_ cv); /* mark this padlist as available */
354 CvPADLIST(cv) = padlist; 509 CvDEPTH (cv) = PTR2IV (POPs);
355#ifdef USE_THREADS 510 CvPADLIST (cv) = (AV *)POPs;
356 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
357#endif
358 }
359
360 ++CvDEPTH(cv);
361 } 511 }
362 512
363 PUTBACK; 513 PUTBACK;
364 } 514 }
365}
366 515
516 slf_frame = c->slf_frame;
517 CORO_THROW = c->except;
518}
519
367static void 520static void
368save_state(pTHX_ Coro__State c, int flags) 521save_perl (pTHX_ Coro__State c)
369{ 522{
523 c->except = CORO_THROW;
524 c->slf_frame = slf_frame;
525
370 { 526 {
371 dSP; 527 dSP;
372 I32 cxix = cxstack_ix; 528 I32 cxix = cxstack_ix;
373 PERL_CONTEXT *ccstk = cxstack; 529 PERL_CONTEXT *ccstk = cxstack;
374 PERL_SI *top_si = PL_curstackinfo; 530 PERL_SI *top_si = PL_curstackinfo;
… …
376 /* 532 /*
377 * the worst thing you can imagine happens first - we have to save 533 * the worst thing you can imagine happens first - we have to save
378 * (and reinitialize) all cv's in the whole callchain :( 534 * (and reinitialize) all cv's in the whole callchain :(
379 */ 535 */
380 536
381 PUSHs (Nullsv); 537 XPUSHs (Nullsv);
382 /* this loop was inspired by pp_caller */ 538 /* this loop was inspired by pp_caller */
383 for (;;) 539 for (;;)
384 { 540 {
385 while (cxix >= 0) 541 while (expect_true (cxix >= 0))
386 { 542 {
387 PERL_CONTEXT *cx = &ccstk[cxix--]; 543 PERL_CONTEXT *cx = &ccstk[cxix--];
388 544
389 if (CxTYPE(cx) == CXt_SUB) 545 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
390 { 546 {
391 CV *cv = cx->blk_sub.cv; 547 CV *cv = cx->blk_sub.cv;
548
392 if (CvDEPTH(cv)) 549 if (expect_true (CvDEPTH (cv)))
393 { 550 {
394#ifdef USE_THREADS
395 /*XPUSHs ((SV *)CvOWNER(cv));*/
396 /*CvOWNER(cv) = 0;*/
397 /*error must unlock this cv etc.. etc...*/
398#endif
399 EXTEND (SP, CvDEPTH(cv)*2); 551 EXTEND (SP, 3);
400
401 while (--CvDEPTH(cv))
402 {
403 /* this tells the restore code to increment CvDEPTH */
404 PUSHs (Nullsv);
405 PUSHs ((SV *)cv);
406 }
407
408 PUSHs ((SV *)CvPADLIST(cv)); 552 PUSHs ((SV *)CvPADLIST (cv));
553 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
409 PUSHs ((SV *)cv); 554 PUSHs ((SV *)cv);
410 555
411 get_padlist (cv); /* this is a monster */ 556 CvDEPTH (cv) = 0;
557 get_padlist (aTHX_ cv);
412 } 558 }
413 } 559 }
414#ifdef CXt_FORMAT
415 else if (CxTYPE(cx) == CXt_FORMAT)
416 {
417 /* I never used formats, so how should I know how these are implemented? */
418 /* my bold guess is as a simple, plain sub... */
419 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
420 }
421#endif
422 } 560 }
423 561
424 if (top_si->si_type == PERLSI_MAIN) 562 if (expect_true (top_si->si_type == PERLSI_MAIN))
425 break; 563 break;
426 564
427 top_si = top_si->si_prev; 565 top_si = top_si->si_prev;
428 ccstk = top_si->si_cxstack; 566 ccstk = top_si->si_cxstack;
429 cxix = top_si->si_cxix; 567 cxix = top_si->si_cxix;
430 } 568 }
431 569
432 PUTBACK; 570 PUTBACK;
433 } 571 }
434 572
435 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 573 /* allocate some space on the context stack for our purposes */
436 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 574 /* we manually unroll here, as usually 2 slots is enough */
437 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 575 if (SLOT_COUNT >= 1) CXINC;
576 if (SLOT_COUNT >= 2) CXINC;
577 if (SLOT_COUNT >= 3) CXINC;
578 {
579 int i;
580 for (i = 3; i < SLOT_COUNT; ++i)
581 CXINC;
582 }
583 cxstack_ix -= SLOT_COUNT; /* undo allocation */
438 584
439 c->dowarn = PL_dowarn;
440 c->in_eval = PL_in_eval;
441
442 c->curstackinfo = PL_curstackinfo;
443 c->curstack = PL_curstack;
444 c->mainstack = PL_mainstack; 585 c->mainstack = PL_mainstack;
445 c->stack_sp = PL_stack_sp; 586
446 c->op = PL_op; 587 {
447 c->curpad = PL_curpad; 588 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
448 c->comppad = PL_comppad; 589
449 c->stack_base = PL_stack_base; 590 slot->defav = GvAV (PL_defgv);
450 c->stack_max = PL_stack_max; 591 slot->defsv = DEFSV;
451 c->tmps_stack = PL_tmps_stack; 592 slot->errsv = ERRSV;
452 c->tmps_floor = PL_tmps_floor; 593 slot->irsgv = GvSV (irsgv);
453 c->tmps_ix = PL_tmps_ix; 594
454 c->tmps_max = PL_tmps_max; 595 #define VAR(name,type) slot->name = PL_ ## name;
455 c->markstack = PL_markstack; 596 # include "state.h"
456 c->markstack_ptr = PL_markstack_ptr; 597 #undef VAR
457 c->markstack_max = PL_markstack_max; 598 }
458 c->scopestack = PL_scopestack;
459 c->scopestack_ix = PL_scopestack_ix;
460 c->scopestack_max = PL_scopestack_max;
461 c->savestack = PL_savestack;
462 c->savestack_ix = PL_savestack_ix;
463 c->savestack_max = PL_savestack_max;
464 c->retstack = PL_retstack;
465 c->retstack_ix = PL_retstack_ix;
466 c->retstack_max = PL_retstack_max;
467 c->curcop = PL_curcop;
468 c->top_env = PL_top_env;
469} 599}
470 600
471/* 601/*
472 * allocate various perl stacks. This is an exact copy 602 * allocate various perl stacks. This is almost an exact copy
473 * of perl.c:init_stacks, except that it uses less memory 603 * of perl.c:init_stacks, except that it uses less memory
474 * on the (sometimes correct) assumption that coroutines do 604 * on the (sometimes correct) assumption that coroutines do
475 * not usually need a lot of stackspace. 605 * not usually need a lot of stackspace.
476 */ 606 */
477STATIC void 607#if CORO_PREFER_PERL_FUNCTIONS
608# define coro_init_stacks init_stacks
609#else
610static void
478coro_init_stacks (pTHX) 611coro_init_stacks (pTHX)
479{ 612{
480 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 613 PL_curstackinfo = new_stackinfo(32, 8);
481 PL_curstackinfo->si_type = PERLSI_MAIN; 614 PL_curstackinfo->si_type = PERLSI_MAIN;
482 PL_curstack = PL_curstackinfo->si_stack; 615 PL_curstack = PL_curstackinfo->si_stack;
483 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 616 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
484 617
485 PL_stack_base = AvARRAY(PL_curstack); 618 PL_stack_base = AvARRAY(PL_curstack);
486 PL_stack_sp = PL_stack_base; 619 PL_stack_sp = PL_stack_base;
487 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 620 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
488 621
489 New(50,PL_tmps_stack,96,SV*); 622 New(50,PL_tmps_stack,32,SV*);
490 PL_tmps_floor = -1; 623 PL_tmps_floor = -1;
491 PL_tmps_ix = -1; 624 PL_tmps_ix = -1;
492 PL_tmps_max = 96; 625 PL_tmps_max = 32;
493 626
494 New(54,PL_markstack,16,I32); 627 New(54,PL_markstack,16,I32);
495 PL_markstack_ptr = PL_markstack; 628 PL_markstack_ptr = PL_markstack;
496 PL_markstack_max = PL_markstack + 16; 629 PL_markstack_max = PL_markstack + 16;
497 630
498#ifdef SET_MARK_OFFSET 631#ifdef SET_MARK_OFFSET
499 SET_MARK_OFFSET; 632 SET_MARK_OFFSET;
500#endif 633#endif
501 634
502 New(54,PL_scopestack,16,I32); 635 New(54,PL_scopestack,8,I32);
503 PL_scopestack_ix = 0; 636 PL_scopestack_ix = 0;
504 PL_scopestack_max = 16; 637 PL_scopestack_max = 8;
505 638
506 New(54,PL_savestack,96,ANY); 639 New(54,PL_savestack,24,ANY);
507 PL_savestack_ix = 0; 640 PL_savestack_ix = 0;
508 PL_savestack_max = 96; 641 PL_savestack_max = 24;
509 642
643#if !PERL_VERSION_ATLEAST (5,10,0)
510 New(54,PL_retstack,8,OP*); 644 New(54,PL_retstack,4,OP*);
511 PL_retstack_ix = 0; 645 PL_retstack_ix = 0;
512 PL_retstack_max = 8; 646 PL_retstack_max = 4;
647#endif
513} 648}
649#endif
514 650
515/* 651/*
516 * destroy the stacks, the callchain etc... 652 * destroy the stacks, the callchain etc...
517 */ 653 */
518STATIC void 654static void
519destroy_stacks(pTHX) 655coro_destruct_stacks (pTHX)
520{ 656{
521 if (!IN_DESTRUCT)
522 {
523 /* is this ugly, I ask? */
524 LEAVE_SCOPE (0);
525
526 /* sure it is, but more important: is it correct?? :/ */
527 FREETMPS;
528 }
529
530 while (PL_curstackinfo->si_next) 657 while (PL_curstackinfo->si_next)
531 PL_curstackinfo = PL_curstackinfo->si_next; 658 PL_curstackinfo = PL_curstackinfo->si_next;
532 659
533 while (PL_curstackinfo) 660 while (PL_curstackinfo)
534 { 661 {
535 PERL_SI *p = PL_curstackinfo->si_prev; 662 PERL_SI *p = PL_curstackinfo->si_prev;
536 663
537 {
538 dSP;
539 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
540 PUTBACK; /* possibly superfluous */
541 }
542
543 if (!IN_DESTRUCT) 664 if (!IN_DESTRUCT)
544 {
545 dounwind(-1);
546 SvREFCNT_dec(PL_curstackinfo->si_stack); 665 SvREFCNT_dec (PL_curstackinfo->si_stack);
547 }
548 666
549 Safefree(PL_curstackinfo->si_cxstack); 667 Safefree (PL_curstackinfo->si_cxstack);
550 Safefree(PL_curstackinfo); 668 Safefree (PL_curstackinfo);
551 PL_curstackinfo = p; 669 PL_curstackinfo = p;
552 } 670 }
553 671
554 Safefree(PL_tmps_stack); 672 Safefree (PL_tmps_stack);
555 Safefree(PL_markstack); 673 Safefree (PL_markstack);
556 Safefree(PL_scopestack); 674 Safefree (PL_scopestack);
557 Safefree(PL_savestack); 675 Safefree (PL_savestack);
676#if !PERL_VERSION_ATLEAST (5,10,0)
558 Safefree(PL_retstack); 677 Safefree (PL_retstack);
559}
560
561static void
562allocate_stack (Coro__State ctx, int alloc)
563{
564 coro_stack *stack;
565
566 New (0, stack, 1, coro_stack);
567
568 stack->refcnt = 1;
569 stack->usecnt = 1;
570 stack->gencnt = ctx->gencnt = 0;
571 if (alloc)
572 {
573#if HAVE_MMAP
574 stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
575 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
576 if (stack->sptr == (void *)-1)
577#endif 678#endif
679}
680
681static size_t
682coro_rss (pTHX_ struct coro *coro)
683{
684 size_t rss = sizeof (*coro);
685
686 if (coro->mainstack)
687 {
688 perl_slots tmp_slot;
689 perl_slots *slot;
690
691 if (coro->flags & CF_RUNNING)
578 { 692 {
579 /*FIXME*//*D*//* reasonable stack size! */ 693 slot = &tmp_slot;
580 stack->ssize = - (8192 * sizeof (long)); 694
581 New (0, stack->sptr, 8192, long); 695 #define VAR(name,type) slot->name = PL_ ## name;
696 # include "state.h"
697 #undef VAR
582 } 698 }
583 }
584 else 699 else
585 stack->sptr = 0; 700 slot = coro->slot;
586 701
587 ctx->stack = stack; 702 if (slot)
588}
589
590static void
591deallocate_stack (Coro__State ctx)
592{
593 coro_stack *stack = ctx->stack;
594
595 ctx->stack = 0;
596
597 if (stack)
598 {
599 if (!--stack->refcnt)
600 { 703 {
601#ifdef HAVE_MMAP 704 rss += sizeof (slot->curstackinfo);
602 if (stack->ssize > 0 && stack->sptr) 705 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
603 munmap (stack->sptr, stack->ssize); 706 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
604 else 707 rss += slot->tmps_max * sizeof (SV *);
605#endif 708 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
606 Safefree (stack->sptr); 709 rss += slot->scopestack_max * sizeof (I32);
710 rss += slot->savestack_max * sizeof (ANY);
607 711
608 Safefree (stack); 712#if !PERL_VERSION_ATLEAST (5,10,0)
713 rss += slot->retstack_max * sizeof (OP *);
714#endif
609 } 715 }
610 else if (ctx->gencnt == stack->gencnt) 716 }
611 --stack->usecnt; 717
718 return rss;
719}
720
721/** coroutine stack handling ************************************************/
722
723static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
724static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
725static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
726
727/* apparently < 5.8.8 */
728#ifndef MgPV_nolen_const
729#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
730 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
731 (const char*)(mg)->mg_ptr)
732#endif
733
734/*
735 * This overrides the default magic get method of %SIG elements.
736 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
737 * and instead of tryign to save and restore the hash elements, we just provide
738 * readback here.
739 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
740 * not expecting this to actually change the hook. This is a potential problem
741 * when a schedule happens then, but we ignore this.
742 */
743static int
744coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
745{
746 const char *s = MgPV_nolen_const (mg);
747
748 if (*s == '_')
612 } 749 {
613} 750 SV **svp = 0;
614 751
752 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
753 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
754
755 if (svp)
756 {
757 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
758 return 0;
759 }
760 }
761
762 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
763}
764
615static void 765static int
616setup_coro (void *arg) 766coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
767{
768 const char *s = MgPV_nolen_const (mg);
769
770 if (*s == '_')
771 {
772 SV **svp = 0;
773
774 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
775 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
776
777 if (svp)
778 {
779 SV *old = *svp;
780 *svp = 0;
781 SvREFCNT_dec (old);
782 return 0;
783 }
784 }
785
786 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
787}
788
789static int
790coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
791{
792 const char *s = MgPV_nolen_const (mg);
793
794 if (*s == '_')
795 {
796 SV **svp = 0;
797
798 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
799 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
800
801 if (svp)
802 {
803 SV *old = *svp;
804 *svp = newSVsv (sv);
805 SvREFCNT_dec (old);
806 return 0;
807 }
808 }
809
810 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
811}
812
813static void
814prepare_nop (pTHX_ struct coro_transfer_args *ta)
815{
816 /* kind of mega-hacky, but works */
817 ta->next = ta->prev = (struct coro *)ta;
818}
819
820static int
821slf_check_nop (pTHX_ struct CoroSLF *frame)
822{
823 return 0;
824}
825
826static UNOP coro_setup_op;
827
828static void NOINLINE /* noinline to keep it out of the transfer fast path */
829coro_setup (pTHX_ struct coro *coro)
617{ 830{
618 /* 831 /*
619 * emulate part of the perl startup here. 832 * emulate part of the perl startup here.
620 */ 833 */
621 dSP;
622 Coro__State ctx = (Coro__State)arg;
623 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
624
625 coro_init_stacks (aTHX); 834 coro_init_stacks (aTHX);
626 /*PL_curcop = 0;*/ 835
627 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 836 PL_runops = RUNOPS_DEFAULT;
837 PL_curcop = &PL_compiling;
838 PL_in_eval = EVAL_NULL;
839 PL_comppad = 0;
840 PL_curpm = 0;
841 PL_curpad = 0;
842 PL_localizing = 0;
843 PL_dirty = 0;
844 PL_restartop = 0;
845#if PERL_VERSION_ATLEAST (5,10,0)
846 PL_parser = 0;
847#endif
848
849 /* recreate the die/warn hooks */
850 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
851 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
852
853 GvSV (PL_defgv) = newSV (0);
854 GvAV (PL_defgv) = coro->args; coro->args = 0;
855 GvSV (PL_errgv) = newSV (0);
856 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
857 PL_rs = newSVsv (GvSV (irsgv));
858 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
859
860 {
861 dSP;
862 UNOP myop;
863
864 Zero (&myop, 1, UNOP);
865 myop.op_next = Nullop;
866 myop.op_flags = OPf_WANT_VOID;
867
868 PUSHMARK (SP);
869 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
870 PUTBACK;
871 PL_op = (OP *)&myop;
872 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
873 SPAGAIN;
874 }
875
876 /* this newly created coroutine might be run on an existing cctx which most
877 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
878 */
879 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
880 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
881
882 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
883 coro_setup_op.op_next = PL_op;
884 coro_setup_op.op_type = OP_CUSTOM;
885 coro_setup_op.op_ppaddr = pp_slf;
886 /* no flags required, as an init function won't be called */
887
888 PL_op = (OP *)&coro_setup_op;
889
890 /* copy throw, in case it was set before coro_setup */
891 CORO_THROW = coro->except;
892}
893
894static void
895coro_destruct (pTHX_ struct coro *coro)
896{
897 if (!IN_DESTRUCT)
898 {
899 /* restore all saved variables and stuff */
900 LEAVE_SCOPE (0);
901 assert (PL_tmps_floor == -1);
902
903 /* free all temporaries */
904 FREETMPS;
905 assert (PL_tmps_ix == -1);
906
907 /* unwind all extra stacks */
908 POPSTACK_TO (PL_mainstack);
909
910 /* unwind main stack */
911 dounwind (-1);
912 }
913
914 SvREFCNT_dec (GvSV (PL_defgv));
628 SvREFCNT_dec (GvAV (PL_defgv)); 915 SvREFCNT_dec (GvAV (PL_defgv));
629 GvAV (PL_defgv) = ctx->args; ctx->args = 0; 916 SvREFCNT_dec (GvSV (PL_errgv));
917 SvREFCNT_dec (PL_defoutgv);
918 SvREFCNT_dec (PL_rs);
919 SvREFCNT_dec (GvSV (irsgv));
630 920
631 SPAGAIN; 921 SvREFCNT_dec (PL_diehook);
922 SvREFCNT_dec (PL_warnhook);
923
924 SvREFCNT_dec (CORO_THROW);
925 SvREFCNT_dec (coro->saved_deffh);
926 SvREFCNT_dec (coro->rouse_cb);
632 927
633 if (ctx->stack) 928 coro_destruct_stacks (aTHX);
634 { 929}
635 ctx->cursp = 0;
636 930
637 PUSHMARK(SP); 931INLINE void
638 PUTBACK; 932free_coro_mortal (pTHX)
639 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 933{
640 934 if (expect_true (coro_mortal))
641 if (SvTRUE (ERRSV))
642 croak (NULL);
643 else
644 croak ("FATAL: CCTXT coroutine returned!");
645 } 935 {
646 else 936 SvREFCNT_dec (coro_mortal);
937 coro_mortal = 0;
647 { 938 }
648 UNOP myop; 939}
649 940
650 PL_op = (OP *)&myop; 941static int
942runops_trace (pTHX)
943{
944 COP *oldcop = 0;
945 int oldcxix = -2;
946 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
947 coro_cctx *cctx = coro->cctx;
651 948
652 Zero(&myop, 1, UNOP); 949 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
653 myop.op_next = Nullop;
654 myop.op_flags = OPf_WANT_VOID;
655
656 PUSHMARK(SP);
657 XPUSHs (sub_init);
658 /*
659 * the next line is slightly wrong, as PL_op->op_next
660 * is actually being executed so we skip the first op.
661 * that doesn't matter, though, since it is only
662 * pp_nextstate and we never return...
663 * ah yes, and I don't care anyways ;)
664 */
665 PUTBACK;
666 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
667 SPAGAIN;
668
669 ENTER; /* necessary e.g. for dounwind */
670 } 950 {
671} 951 PERL_ASYNC_CHECK ();
672 952
673static void 953 if (cctx->flags & CC_TRACE_ALL)
674continue_coro (void *arg)
675{
676 /*
677 * this is a _very_ stripped down perl interpreter ;)
678 */
679 Coro__State ctx = (Coro__State)arg;
680 JMPENV coro_start_env;
681
682 PL_top_env = &ctx->start_env;
683
684 ctx->cursp = 0;
685 PL_op = PL_op->op_next;
686 CALLRUNOPS(aTHX);
687
688 abort ();
689}
690
691STATIC void
692transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
693{
694 dSTACKLEVEL;
695 static struct coro *xnext;
696
697 if (prev != next)
698 {
699 xnext = next;
700
701 if (next->mainstack)
702 { 954 {
703 SAVE (prev, flags); 955 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
704 LOAD (next);
705
706 /* mark this state as in-use */
707 next->mainstack = 0;
708 next->tmps_ix = -2;
709
710 /* stacklevel changed? if yes, grab the stack for us! */
711 if (flags & TRANSFER_SAVE_CCTXT)
712 { 956 {
713 if (!prev->stack) 957 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
714 allocate_stack (prev, 0); 958 SV **bot, **top;
715 else if (prev->cursp != stacklevel 959 AV *av = newAV (); /* return values */
716 && prev->stack->usecnt > 1) 960 SV **cb;
961 dSP;
962
963 GV *gv = CvGV (cx->blk_sub.cv);
964 SV *fullname = sv_2mortal (newSV (0));
965 if (isGV (gv))
966 gv_efullname3 (fullname, gv, 0);
967
968 bot = PL_stack_base + cx->blk_oldsp + 1;
969 top = cx->blk_gimme == G_ARRAY ? SP + 1
970 : cx->blk_gimme == G_SCALAR ? bot + 1
971 : bot;
972
973 av_extend (av, top - bot);
974 while (bot < top)
975 av_push (av, SvREFCNT_inc_NN (*bot++));
976
977 PL_runops = RUNOPS_DEFAULT;
978 ENTER;
979 SAVETMPS;
980 EXTEND (SP, 3);
981 PUSHMARK (SP);
982 PUSHs (&PL_sv_no);
983 PUSHs (fullname);
984 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
985 PUTBACK;
986 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
987 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
988 SPAGAIN;
989 FREETMPS;
990 LEAVE;
991 PL_runops = runops_trace;
992 }
993
994 if (oldcop != PL_curcop)
995 {
996 oldcop = PL_curcop;
997
998 if (PL_curcop != &PL_compiling)
717 { 999 {
718 prev->gencnt = ++prev->stack->gencnt; 1000 SV **cb;
719 prev->stack->usecnt = 1;
720 }
721 1001
722 /* has our stack been invalidated? */ 1002 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
723 if (next->stack && next->stack->gencnt != next->gencnt)
724 { 1003 {
725 deallocate_stack (next); 1004 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
726 allocate_stack (next, 1); 1005
727 coro_create (&(next->stack->cctx), 1006 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
728 continue_coro, (void *)next, 1007 {
729 next->stack->sptr, labs (next->stack->ssize)); 1008 runops_proc_t old_runops = PL_runops;
1009 dSP;
1010 GV *gv = CvGV (cx->blk_sub.cv);
1011 SV *fullname = sv_2mortal (newSV (0));
1012
1013 if (isGV (gv))
1014 gv_efullname3 (fullname, gv, 0);
1015
1016 PL_runops = RUNOPS_DEFAULT;
1017 ENTER;
1018 SAVETMPS;
1019 EXTEND (SP, 3);
1020 PUSHMARK (SP);
1021 PUSHs (&PL_sv_yes);
1022 PUSHs (fullname);
1023 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1024 PUTBACK;
1025 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1026 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1027 SPAGAIN;
1028 FREETMPS;
1029 LEAVE;
1030 PL_runops = runops_trace;
1031 }
1032
1033 oldcxix = cxstack_ix;
730 } 1034 }
731 1035
732 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 1036 if (cctx->flags & CC_TRACE_LINE)
733 /* don't add any code here */
734 }
735
736 }
737 else if (next->tmps_ix == -2)
738 croak ("tried to transfer to running coroutine");
739 else
740 {
741 SAVE (prev, -1); /* first get rid of the old state */
742
743 if (flags & TRANSFER_SAVE_CCTXT)
744 {
745 if (!prev->stack)
746 allocate_stack (prev, 0);
747
748 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
749 { 1037 {
750 PL_top_env = &next->start_env; 1038 dSP;
751 1039
752 setup_coro (next); 1040 PL_runops = RUNOPS_DEFAULT;
753 1041 ENTER;
754 prev->stack->refcnt++; 1042 SAVETMPS;
755 prev->stack->usecnt++; 1043 EXTEND (SP, 3);
756 next->stack = prev->stack; 1044 PL_runops = RUNOPS_DEFAULT;
757 next->gencnt = prev->gencnt; 1045 PUSHMARK (SP);
1046 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1047 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1048 PUTBACK;
1049 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1050 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1051 SPAGAIN;
1052 FREETMPS;
1053 LEAVE;
1054 PL_runops = runops_trace;
758 } 1055 }
759 else
760 {
761 assert (!next->stack);
762 allocate_stack (next, 1);
763 coro_create (&(next->stack->cctx),
764 setup_coro, (void *)next,
765 next->stack->sptr, labs (next->stack->ssize));
766 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
767 /* don't add any code here */
768 } 1056 }
769 } 1057 }
770 else
771 setup_coro (next);
772 } 1058 }
1059 }
773 1060
1061 TAINT_NOT;
1062 return 0;
1063}
1064
1065static struct coro_cctx *cctx_ssl_cctx;
1066static struct CoroSLF cctx_ssl_frame;
1067
1068static void
1069slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1070{
1071 ta->prev = (struct coro *)cctx_ssl_cctx;
1072 ta->next = 0;
1073}
1074
1075static int
1076slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1077{
1078 *frame = cctx_ssl_frame;
1079
1080 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1081}
1082
1083/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1084static void NOINLINE
1085cctx_prepare (pTHX_ coro_cctx *cctx)
1086{
1087 PL_top_env = &PL_start_env;
1088
1089 if (cctx->flags & CC_TRACE)
1090 PL_runops = runops_trace;
1091
1092 /* we already must be executing an SLF op, there is no other valid way
1093 * that can lead to creation of a new cctx */
1094 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1095 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1096
1097 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1098 cctx_ssl_cctx = cctx;
1099 cctx_ssl_frame = slf_frame;
1100
1101 slf_frame.prepare = slf_prepare_set_stacklevel;
1102 slf_frame.check = slf_check_set_stacklevel;
1103}
1104
1105/* the tail of transfer: execute stuff we can only do after a transfer */
1106INLINE void
1107transfer_tail (pTHX)
1108{
1109 free_coro_mortal (aTHX);
1110}
1111
1112/*
1113 * this is a _very_ stripped down perl interpreter ;)
1114 */
1115static void
1116cctx_run (void *arg)
1117{
1118#ifdef USE_ITHREADS
1119# if CORO_PTHREAD
1120 PERL_SET_CONTEXT (coro_thx);
1121# endif
1122#endif
1123 {
1124 dTHX;
1125
1126 /* normally we would need to skip the entersub here */
1127 /* not doing so will re-execute it, which is exactly what we want */
1128 /* PL_nop = PL_nop->op_next */
1129
1130 /* inject a fake subroutine call to cctx_init */
1131 cctx_prepare (aTHX_ (coro_cctx *)arg);
1132
1133 /* cctx_run is the alternative tail of transfer() */
1134 transfer_tail (aTHX);
1135
1136 /* somebody or something will hit me for both perl_run and PL_restartop */
1137 PL_restartop = PL_op;
1138 perl_run (PL_curinterp);
1139
774 /* 1140 /*
775 * xnext is now either prev or next, depending on wether 1141 * If perl-run returns we assume exit() was being called or the coro
776 * we switched the c stack or not. that's why I use a global 1142 * fell off the end, which seems to be the only valid (non-bug)
777 * variable, that should become thread-specific at one point. 1143 * reason for perl_run to return. We try to exit by jumping to the
1144 * bootstrap-time "top" top_env, as we cannot restore the "main"
1145 * coroutine as Coro has no such concept
778 */ 1146 */
779 xnext->cursp = stacklevel; 1147 PL_top_env = main_top_env;
1148 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1149 }
1150}
1151
1152static coro_cctx *
1153cctx_new ()
1154{
1155 coro_cctx *cctx;
1156
1157 ++cctx_count;
1158 New (0, cctx, 1, coro_cctx);
1159
1160 cctx->gen = cctx_gen;
1161 cctx->flags = 0;
1162 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1163
1164 return cctx;
1165}
1166
1167/* create a new cctx only suitable as source */
1168static coro_cctx *
1169cctx_new_empty ()
1170{
1171 coro_cctx *cctx = cctx_new ();
1172
1173 cctx->sptr = 0;
1174 coro_create (&cctx->cctx, 0, 0, 0, 0);
1175
1176 return cctx;
1177}
1178
1179/* create a new cctx suitable as destination/running a perl interpreter */
1180static coro_cctx *
1181cctx_new_run ()
1182{
1183 coro_cctx *cctx = cctx_new ();
1184 void *stack_start;
1185 size_t stack_size;
1186
1187#if HAVE_MMAP
1188 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1189 /* mmap supposedly does allocate-on-write for us */
1190 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1191
1192 if (cctx->sptr != (void *)-1)
780 } 1193 {
781 1194 #if CORO_STACKGUARD
782 if (coro_mortal) 1195 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1196 #endif
1197 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1198 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1199 cctx->flags |= CC_MAPPED;
783 { 1200 }
784 SvREFCNT_dec (coro_mortal); 1201 else
785 coro_mortal = 0; 1202#endif
786 } 1203 {
787} 1204 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1205 New (0, cctx->sptr, cctx_stacksize, long);
788 1206
789#define SV_CORO(sv,func) \ 1207 if (!cctx->sptr)
790 do { \ 1208 {
791 if (SvROK (sv)) \ 1209 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
792 sv = SvRV (sv); \ 1210 _exit (EXIT_FAILURE);
793 \ 1211 }
794 if (SvTYPE(sv) == SVt_PVHV) \
795 { \
796 HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
797 \
798 if (!he) \
799 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
800 \
801 (sv) = SvRV (HeVAL(he)); \
802 } \
803 \
804 /* must also be changed inside Coro::Cont::yield */ \
805 if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
806 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
807 \
808 } while(0)
809 1212
810#define SvSTATE(sv) (struct coro *)SvIV (sv) 1213 stack_start = cctx->sptr;
1214 stack_size = cctx->ssize;
1215 }
811 1216
1217 #if CORO_USE_VALGRIND
1218 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1219 #endif
1220
1221 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1222
1223 return cctx;
1224}
1225
1226static void
1227cctx_destroy (coro_cctx *cctx)
1228{
1229 if (!cctx)
1230 return;
1231
1232 --cctx_count;
1233 coro_destroy (&cctx->cctx);
1234
1235 /* coro_transfer creates new, empty cctx's */
1236 if (cctx->sptr)
1237 {
1238 #if CORO_USE_VALGRIND
1239 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1240 #endif
1241
1242#if HAVE_MMAP
1243 if (cctx->flags & CC_MAPPED)
1244 munmap (cctx->sptr, cctx->ssize);
1245 else
1246#endif
1247 Safefree (cctx->sptr);
1248 }
1249
1250 Safefree (cctx);
1251}
1252
1253/* wether this cctx should be destructed */
1254#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1255
1256static coro_cctx *
1257cctx_get (pTHX)
1258{
1259 while (expect_true (cctx_first))
1260 {
1261 coro_cctx *cctx = cctx_first;
1262 cctx_first = cctx->next;
1263 --cctx_idle;
1264
1265 if (expect_true (!CCTX_EXPIRED (cctx)))
1266 return cctx;
1267
1268 cctx_destroy (cctx);
1269 }
1270
1271 return cctx_new_run ();
1272}
1273
1274static void
1275cctx_put (coro_cctx *cctx)
1276{
1277 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1278
1279 /* free another cctx if overlimit */
1280 if (expect_false (cctx_idle >= cctx_max_idle))
1281 {
1282 coro_cctx *first = cctx_first;
1283 cctx_first = first->next;
1284 --cctx_idle;
1285
1286 cctx_destroy (first);
1287 }
1288
1289 ++cctx_idle;
1290 cctx->next = cctx_first;
1291 cctx_first = cctx;
1292}
1293
1294/** coroutine switching *****************************************************/
1295
1296static void
1297transfer_check (pTHX_ struct coro *prev, struct coro *next)
1298{
1299 /* TODO: throwing up here is considered harmful */
1300
1301 if (expect_true (prev != next))
1302 {
1303 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1304 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1305
1306 if (expect_false (next->flags & CF_RUNNING))
1307 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1308
1309 if (expect_false (next->flags & CF_DESTROYED))
1310 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1311
1312#if !PERL_VERSION_ATLEAST (5,10,0)
1313 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1314 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1315#endif
1316 }
1317}
1318
1319/* always use the TRANSFER macro */
1320static void NOINLINE /* noinline so we have a fixed stackframe */
1321transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1322{
1323 dSTACKLEVEL;
1324
1325 /* sometimes transfer is only called to set idle_sp */
1326 if (expect_false (!next))
1327 {
1328 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1329 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1330 }
1331 else if (expect_true (prev != next))
1332 {
1333 coro_cctx *prev__cctx;
1334
1335 if (expect_false (prev->flags & CF_NEW))
1336 {
1337 /* create a new empty/source context */
1338 prev->cctx = cctx_new_empty ();
1339 prev->flags &= ~CF_NEW;
1340 prev->flags |= CF_RUNNING;
1341 }
1342
1343 prev->flags &= ~CF_RUNNING;
1344 next->flags |= CF_RUNNING;
1345
1346 /* first get rid of the old state */
1347 save_perl (aTHX_ prev);
1348
1349 if (expect_false (next->flags & CF_NEW))
1350 {
1351 /* need to start coroutine */
1352 next->flags &= ~CF_NEW;
1353 /* setup coroutine call */
1354 coro_setup (aTHX_ next);
1355 }
1356 else
1357 load_perl (aTHX_ next);
1358
1359 prev__cctx = prev->cctx;
1360
1361 /* possibly untie and reuse the cctx */
1362 if (expect_true (
1363 prev__cctx->idle_sp == STACKLEVEL
1364 && !(prev__cctx->flags & CC_TRACE)
1365 && !force_cctx
1366 ))
1367 {
1368 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1369 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1370
1371 prev->cctx = 0;
1372
1373 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1374 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1375 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1376 if (!next->cctx)
1377 next->cctx = cctx_get (aTHX);
1378
1379 cctx_put (prev__cctx);
1380 }
1381
1382 ++next->usecount;
1383
1384 if (expect_true (!next->cctx))
1385 next->cctx = cctx_get (aTHX);
1386
1387 if (expect_false (prev__cctx != next->cctx))
1388 {
1389 prev__cctx->top_env = PL_top_env;
1390 PL_top_env = next->cctx->top_env;
1391 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1392 }
1393
1394 transfer_tail (aTHX);
1395 }
1396}
1397
1398#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1399#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1400
1401/** high level stuff ********************************************************/
1402
812static void 1403static int
1404coro_state_destroy (pTHX_ struct coro *coro)
1405{
1406 if (coro->flags & CF_DESTROYED)
1407 return 0;
1408
1409 if (coro->on_destroy)
1410 coro->on_destroy (aTHX_ coro);
1411
1412 coro->flags |= CF_DESTROYED;
1413
1414 if (coro->flags & CF_READY)
1415 {
1416 /* reduce nready, as destroying a ready coro effectively unreadies it */
1417 /* alternative: look through all ready queues and remove the coro */
1418 --coro_nready;
1419 }
1420 else
1421 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1422
1423 if (coro->mainstack && coro->mainstack != main_mainstack)
1424 {
1425 struct coro temp;
1426
1427 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1428
1429 save_perl (aTHX_ &temp);
1430 load_perl (aTHX_ coro);
1431
1432 coro_destruct (aTHX_ coro);
1433
1434 load_perl (aTHX_ &temp);
1435
1436 coro->slot = 0;
1437 }
1438
1439 cctx_destroy (coro->cctx);
1440 SvREFCNT_dec (coro->args);
1441
1442 if (coro->next) coro->next->prev = coro->prev;
1443 if (coro->prev) coro->prev->next = coro->next;
1444 if (coro == coro_first) coro_first = coro->next;
1445
1446 return 1;
1447}
1448
1449static int
1450coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1451{
1452 struct coro *coro = (struct coro *)mg->mg_ptr;
1453 mg->mg_ptr = 0;
1454
1455 coro->hv = 0;
1456
1457 if (--coro->refcnt < 0)
1458 {
1459 coro_state_destroy (aTHX_ coro);
1460 Safefree (coro);
1461 }
1462
1463 return 0;
1464}
1465
1466static int
1467coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1468{
1469 struct coro *coro = (struct coro *)mg->mg_ptr;
1470
1471 ++coro->refcnt;
1472
1473 return 0;
1474}
1475
1476static MGVTBL coro_state_vtbl = {
1477 0, 0, 0, 0,
1478 coro_state_free,
1479 0,
1480#ifdef MGf_DUP
1481 coro_state_dup,
1482#else
1483# define MGf_DUP 0
1484#endif
1485};
1486
1487static void
1488prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1489{
1490 ta->prev = SvSTATE (prev_sv);
1491 ta->next = SvSTATE (next_sv);
1492 TRANSFER_CHECK (*ta);
1493}
1494
1495static void
813api_transfer(pTHX_ SV *prev, SV *next, int flags) 1496api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
814{ 1497{
815 SV_CORO (prev, "Coro::transfer"); 1498 struct coro_transfer_args ta;
816 SV_CORO (next, "Coro::transfer");
817 1499
818 transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags); 1500 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1501 TRANSFER (ta, 1);
1502}
1503
1504/*****************************************************************************/
1505/* gensub: simple closure generation utility */
1506
1507#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1508
1509/* create a closure from XS, returns a code reference */
1510/* the arg can be accessed via GENSUB_ARG from the callback */
1511/* the callback must use dXSARGS/XSRETURN */
1512static SV *
1513gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1514{
1515 CV *cv = (CV *)newSV (0);
1516
1517 sv_upgrade ((SV *)cv, SVt_PVCV);
1518
1519 CvANON_on (cv);
1520 CvISXSUB_on (cv);
1521 CvXSUB (cv) = xsub;
1522 GENSUB_ARG = arg;
1523
1524 return newRV_noinc ((SV *)cv);
819} 1525}
820 1526
821/** Coro ********************************************************************/ 1527/** Coro ********************************************************************/
822 1528
823#define PRIO_MAX 3 1529INLINE void
824#define PRIO_HIGH 1 1530coro_enq (pTHX_ struct coro *coro)
825#define PRIO_NORMAL 0 1531{
826#define PRIO_LOW -1 1532 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
827#define PRIO_IDLE -3 1533}
828#define PRIO_MIN -4
829 1534
830/* for Coro.pm */ 1535INLINE SV *
831static GV *coro_current, *coro_idle; 1536coro_deq (pTHX)
832static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 1537{
833static int coro_nready; 1538 int prio;
834 1539
1540 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1541 if (AvFILLp (coro_ready [prio]) >= 0)
1542 return av_shift (coro_ready [prio]);
1543
1544 return 0;
1545}
1546
835static void 1547static int
836coro_enq (SV *sv) 1548api_ready (pTHX_ SV *coro_sv)
837{ 1549{
838 if (SvTYPE (sv) == SVt_PVHV) 1550 struct coro *coro;
1551 SV *sv_hook;
1552 void (*xs_hook)(void);
1553
1554 if (SvROK (coro_sv))
1555 coro_sv = SvRV (coro_sv);
1556
1557 coro = SvSTATE (coro_sv);
1558
1559 if (coro->flags & CF_READY)
1560 return 0;
1561
1562 coro->flags |= CF_READY;
1563
1564 sv_hook = coro_nready ? 0 : coro_readyhook;
1565 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1566
1567 coro_enq (aTHX_ coro);
1568 ++coro_nready;
1569
1570 if (sv_hook)
1571 {
1572 dSP;
1573
1574 ENTER;
1575 SAVETMPS;
1576
1577 PUSHMARK (SP);
1578 PUTBACK;
1579 call_sv (sv_hook, G_VOID | G_DISCARD);
1580
1581 FREETMPS;
1582 LEAVE;
839 { 1583 }
840 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
841 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
842 1584
843 prio = prio > PRIO_MAX ? PRIO_MAX 1585 if (xs_hook)
844 : prio < PRIO_MIN ? PRIO_MIN 1586 xs_hook ();
845 : prio;
846 1587
847 av_push (coro_ready [prio - PRIO_MIN], sv); 1588 return 1;
1589}
1590
1591static int
1592api_is_ready (pTHX_ SV *coro_sv)
1593{
1594 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1595}
1596
1597INLINE void
1598prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1599{
1600 SV *prev_sv, *next_sv;
1601
1602 for (;;)
1603 {
1604 next_sv = coro_deq (aTHX);
1605
1606 /* nothing to schedule: call the idle handler */
1607 if (expect_false (!next_sv))
1608 {
1609 dSP;
1610
1611 ENTER;
1612 SAVETMPS;
1613
1614 PUSHMARK (SP);
1615 PUTBACK;
1616 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1617
1618 FREETMPS;
1619 LEAVE;
1620 continue;
1621 }
1622
1623 ta->next = SvSTATE_hv (next_sv);
1624
1625 /* cannot transfer to destroyed coros, skip and look for next */
1626 if (expect_false (ta->next->flags & CF_DESTROYED))
1627 {
1628 SvREFCNT_dec (next_sv);
1629 /* coro_nready has already been taken care of by destroy */
1630 continue;
1631 }
1632
848 coro_nready++; 1633 --coro_nready;
1634 break;
1635 }
849 1636
1637 /* free this only after the transfer */
1638 prev_sv = SvRV (coro_current);
1639 ta->prev = SvSTATE_hv (prev_sv);
1640 TRANSFER_CHECK (*ta);
1641 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1642 ta->next->flags &= ~CF_READY;
1643 SvRV_set (coro_current, next_sv);
1644
1645 free_coro_mortal (aTHX);
1646 coro_mortal = prev_sv;
1647}
1648
1649INLINE void
1650prepare_cede (pTHX_ struct coro_transfer_args *ta)
1651{
1652 api_ready (aTHX_ coro_current);
1653 prepare_schedule (aTHX_ ta);
1654}
1655
1656INLINE void
1657prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1658{
1659 SV *prev = SvRV (coro_current);
1660
1661 if (coro_nready)
1662 {
1663 prepare_schedule (aTHX_ ta);
1664 api_ready (aTHX_ prev);
1665 }
1666 else
1667 prepare_nop (aTHX_ ta);
1668}
1669
1670static void
1671api_schedule (pTHX)
1672{
1673 struct coro_transfer_args ta;
1674
1675 prepare_schedule (aTHX_ &ta);
1676 TRANSFER (ta, 1);
1677}
1678
1679static int
1680api_cede (pTHX)
1681{
1682 struct coro_transfer_args ta;
1683
1684 prepare_cede (aTHX_ &ta);
1685
1686 if (expect_true (ta.prev != ta.next))
1687 {
1688 TRANSFER (ta, 1);
850 return; 1689 return 1;
1690 }
1691 else
1692 return 0;
1693}
1694
1695static int
1696api_cede_notself (pTHX)
1697{
1698 if (coro_nready)
851 } 1699 {
1700 struct coro_transfer_args ta;
852 1701
853 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 1702 prepare_cede_notself (aTHX_ &ta);
1703 TRANSFER (ta, 1);
1704 return 1;
1705 }
1706 else
1707 return 0;
1708}
1709
1710static void
1711api_trace (pTHX_ SV *coro_sv, int flags)
1712{
1713 struct coro *coro = SvSTATE (coro_sv);
1714
1715 if (flags & CC_TRACE)
1716 {
1717 if (!coro->cctx)
1718 coro->cctx = cctx_new_run ();
1719 else if (!(coro->cctx->flags & CC_TRACE))
1720 croak ("cannot enable tracing on coroutine with custom stack,");
1721
1722 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1723 }
1724 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1725 {
1726 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1727
1728 if (coro->flags & CF_RUNNING)
1729 PL_runops = RUNOPS_DEFAULT;
1730 else
1731 coro->slot->runops = RUNOPS_DEFAULT;
1732 }
1733}
1734
1735/*****************************************************************************/
1736/* rouse callback */
1737
1738#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1739
1740static void
1741coro_rouse_callback (pTHX_ CV *cv)
1742{
1743 dXSARGS;
1744 SV *data = (SV *)GENSUB_ARG;
1745
1746 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1747 {
1748 /* first call, set args */
1749 int i;
1750 AV *av = newAV ();
1751 SV *coro = SvRV (data);
1752
1753 SvRV_set (data, (SV *)av);
1754 api_ready (aTHX_ coro);
1755 SvREFCNT_dec (coro);
1756
1757 /* better take a full copy of the arguments */
1758 while (items--)
1759 av_store (av, items, newSVsv (ST (items)));
1760 }
1761
1762 XSRETURN_EMPTY;
1763}
1764
1765static int
1766slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1767{
1768 SV *data = (SV *)frame->data;
1769
1770 if (CORO_THROW)
1771 return 0;
1772
1773 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1774 return 1;
1775
1776 /* now push all results on the stack */
1777 {
1778 dSP;
1779 AV *av = (AV *)SvRV (data);
1780 int i;
1781
1782 EXTEND (SP, AvFILLp (av) + 1);
1783 for (i = 0; i <= AvFILLp (av); ++i)
1784 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1785
1786 /* we have stolen the elements, so ste length to zero and free */
1787 AvFILLp (av) = -1;
1788 av_undef (av);
1789
1790 PUTBACK;
1791 }
1792
1793 return 0;
1794}
1795
1796static void
1797slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1798{
1799 SV *cb;
1800
1801 if (items)
1802 cb = arg [0];
1803 else
1804 {
1805 struct coro *coro = SvSTATE_current;
1806
1807 if (!coro->rouse_cb)
1808 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
1809
1810 cb = sv_2mortal (coro->rouse_cb);
1811 coro->rouse_cb = 0;
1812 }
1813
1814 if (!SvROK (cb)
1815 || SvTYPE (SvRV (cb)) != SVt_PVCV
1816 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
1817 croak ("Coro::rouse_wait called with illegal callback argument,");
1818
1819 {
1820 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
1821 SV *data = (SV *)GENSUB_ARG;
1822
1823 frame->data = (void *)data;
1824 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
1825 frame->check = slf_check_rouse_wait;
1826 }
854} 1827}
855 1828
856static SV * 1829static SV *
857coro_deq (int min_prio) 1830coro_new_rouse_cb (pTHX)
858{ 1831{
859 int prio = PRIO_MAX - PRIO_MIN; 1832 HV *hv = (HV *)SvRV (coro_current);
1833 struct coro *coro = SvSTATE_hv (hv);
1834 SV *data = newRV_inc ((SV *)hv);
1835 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
860 1836
861 min_prio -= PRIO_MIN; 1837 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
862 if (min_prio < 0) 1838 SvREFCNT_dec (data); /* magicext increases the refcount */
863 min_prio = 0;
864 1839
865 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1840 SvREFCNT_dec (coro->rouse_cb);
866 if (av_len (coro_ready[prio]) >= 0) 1841 coro->rouse_cb = SvREFCNT_inc_NN (cb);
1842
1843 return cb;
1844}
1845
1846/*****************************************************************************/
1847/* schedule-like-function opcode (SLF) */
1848
1849static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1850static const CV *slf_cv;
1851static SV **slf_argv;
1852static int slf_argc, slf_arga; /* count, allocated */
1853static I32 slf_ax; /* top of stack, for restore */
1854
1855/* this restores the stack in the case we patched the entersub, to */
1856/* recreate the stack frame as perl will on following calls */
1857/* since entersub cleared the stack */
1858static OP *
1859pp_restore (pTHX)
1860{
1861 int i;
1862 SV **SP = PL_stack_base + slf_ax;
1863
1864 PUSHMARK (SP);
1865
1866 EXTEND (SP, slf_argc + 1);
1867
1868 for (i = 0; i < slf_argc; ++i)
1869 PUSHs (sv_2mortal (slf_argv [i]));
1870
1871 PUSHs ((SV *)CvGV (slf_cv));
1872
1873 RETURNOP (slf_restore.op_first);
1874}
1875
1876static void
1877slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1878{
1879 SV **arg = (SV **)slf_frame.data;
1880
1881 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1882}
1883
1884static void
1885slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1886{
1887 if (items != 2)
1888 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1889
1890 frame->prepare = slf_prepare_transfer;
1891 frame->check = slf_check_nop;
1892 frame->data = (void *)arg; /* let's hope it will stay valid */
1893}
1894
1895static void
1896slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1897{
1898 frame->prepare = prepare_schedule;
1899 frame->check = slf_check_nop;
1900}
1901
1902static void
1903slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1904{
1905 frame->prepare = prepare_cede;
1906 frame->check = slf_check_nop;
1907}
1908
1909static void
1910slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1911{
1912 frame->prepare = prepare_cede_notself;
1913 frame->check = slf_check_nop;
1914}
1915
1916/*
1917 * these not obviously related functions are all rolled into one
1918 * function to increase chances that they all will call transfer with the same
1919 * stack offset
1920 * SLF stands for "schedule-like-function".
1921 */
1922static OP *
1923pp_slf (pTHX)
1924{
1925 I32 checkmark; /* mark SP to see how many elements check has pushed */
1926
1927 /* set up the slf frame, unless it has already been set-up */
1928 /* the latter happens when a new coro has been started */
1929 /* or when a new cctx was attached to an existing coroutine */
1930 if (expect_true (!slf_frame.prepare))
1931 {
1932 /* first iteration */
1933 dSP;
1934 SV **arg = PL_stack_base + TOPMARK + 1;
1935 int items = SP - arg; /* args without function object */
1936 SV *gv = *sp;
1937
1938 /* do a quick consistency check on the "function" object, and if it isn't */
1939 /* for us, divert to the real entersub */
1940 if (SvTYPE (gv) != SVt_PVGV
1941 || !GvCV (gv)
1942 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1943 return PL_ppaddr[OP_ENTERSUB](aTHX);
1944
1945 if (!(PL_op->op_flags & OPf_STACKED))
867 { 1946 {
868 coro_nready--; 1947 /* ampersand-form of call, use @_ instead of stack */
869 return av_shift (coro_ready[prio]); 1948 AV *av = GvAV (PL_defgv);
1949 arg = AvARRAY (av);
1950 items = AvFILLp (av) + 1;
870 } 1951 }
1952
1953 /* now call the init function, which needs to set up slf_frame */
1954 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1955 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1956
1957 /* pop args */
1958 SP = PL_stack_base + POPMARK;
1959
1960 PUTBACK;
1961 }
1962
1963 /* now that we have a slf_frame, interpret it! */
1964 /* we use a callback system not to make the code needlessly */
1965 /* complicated, but so we can run multiple perl coros from one cctx */
1966
1967 do
1968 {
1969 struct coro_transfer_args ta;
1970
1971 slf_frame.prepare (aTHX_ &ta);
1972 TRANSFER (ta, 0);
1973
1974 checkmark = PL_stack_sp - PL_stack_base;
1975 }
1976 while (slf_frame.check (aTHX_ &slf_frame));
1977
1978 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1979
1980 /* exception handling */
1981 if (expect_false (CORO_THROW))
1982 {
1983 SV *exception = sv_2mortal (CORO_THROW);
1984
1985 CORO_THROW = 0;
1986 sv_setsv (ERRSV, exception);
1987 croak (0);
1988 }
1989
1990 /* return value handling - mostly like entersub */
1991 /* make sure we put something on the stack in scalar context */
1992 if (GIMME_V == G_SCALAR)
1993 {
1994 dSP;
1995 SV **bot = PL_stack_base + checkmark;
1996
1997 if (sp == bot) /* too few, push undef */
1998 bot [1] = &PL_sv_undef;
1999 else if (sp != bot + 1) /* too many, take last one */
2000 bot [1] = *sp;
2001
2002 SP = bot + 1;
2003
2004 PUTBACK;
2005 }
2006
2007 return NORMAL;
2008}
2009
2010static void
2011api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2012{
2013 int i;
2014 SV **arg = PL_stack_base + ax;
2015 int items = PL_stack_sp - arg + 1;
2016
2017 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2018
2019 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2020 && PL_op->op_ppaddr != pp_slf)
2021 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2022
2023 CvFLAGS (cv) |= CVf_SLF;
2024 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2025 slf_cv = cv;
2026
2027 /* we patch the op, and then re-run the whole call */
2028 /* we have to put the same argument on the stack for this to work */
2029 /* and this will be done by pp_restore */
2030 slf_restore.op_next = (OP *)&slf_restore;
2031 slf_restore.op_type = OP_CUSTOM;
2032 slf_restore.op_ppaddr = pp_restore;
2033 slf_restore.op_first = PL_op;
2034
2035 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2036
2037 if (PL_op->op_flags & OPf_STACKED)
2038 {
2039 if (items > slf_arga)
2040 {
2041 slf_arga = items;
2042 free (slf_argv);
2043 slf_argv = malloc (slf_arga * sizeof (SV *));
2044 }
2045
2046 slf_argc = items;
2047
2048 for (i = 0; i < items; ++i)
2049 slf_argv [i] = SvREFCNT_inc (arg [i]);
2050 }
2051 else
2052 slf_argc = 0;
2053
2054 PL_op->op_ppaddr = pp_slf;
2055 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
2056
2057 PL_op = (OP *)&slf_restore;
2058}
2059
2060/*****************************************************************************/
2061/* PerlIO::cede */
2062
2063typedef struct
2064{
2065 PerlIOBuf base;
2066 NV next, every;
2067} PerlIOCede;
2068
2069static IV
2070PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2071{
2072 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2073
2074 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2075 self->next = nvtime () + self->every;
2076
2077 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2078}
2079
2080static SV *
2081PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2082{
2083 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2084
2085 return newSVnv (self->every);
2086}
2087
2088static IV
2089PerlIOCede_flush (pTHX_ PerlIO *f)
2090{
2091 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2092 double now = nvtime ();
2093
2094 if (now >= self->next)
2095 {
2096 api_cede (aTHX);
2097 self->next = now + self->every;
2098 }
2099
2100 return PerlIOBuf_flush (aTHX_ f);
2101}
2102
2103static PerlIO_funcs PerlIO_cede =
2104{
2105 sizeof(PerlIO_funcs),
2106 "cede",
2107 sizeof(PerlIOCede),
2108 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2109 PerlIOCede_pushed,
2110 PerlIOBuf_popped,
2111 PerlIOBuf_open,
2112 PerlIOBase_binmode,
2113 PerlIOCede_getarg,
2114 PerlIOBase_fileno,
2115 PerlIOBuf_dup,
2116 PerlIOBuf_read,
2117 PerlIOBuf_unread,
2118 PerlIOBuf_write,
2119 PerlIOBuf_seek,
2120 PerlIOBuf_tell,
2121 PerlIOBuf_close,
2122 PerlIOCede_flush,
2123 PerlIOBuf_fill,
2124 PerlIOBase_eof,
2125 PerlIOBase_error,
2126 PerlIOBase_clearerr,
2127 PerlIOBase_setlinebuf,
2128 PerlIOBuf_get_base,
2129 PerlIOBuf_bufsiz,
2130 PerlIOBuf_get_ptr,
2131 PerlIOBuf_get_cnt,
2132 PerlIOBuf_set_ptrcnt,
2133};
2134
2135/*****************************************************************************/
2136/* Coro::Semaphore & Coro::Signal */
2137
2138static SV *
2139coro_waitarray_new (pTHX_ int count)
2140{
2141 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2142 AV *av = newAV ();
2143 SV **ary;
2144
2145 /* unfortunately, building manually saves memory */
2146 Newx (ary, 2, SV *);
2147 AvALLOC (av) = ary;
2148 AvARRAY (av) = ary;
2149 AvMAX (av) = 1;
2150 AvFILLp (av) = 0;
2151 ary [0] = newSViv (count);
2152
2153 return newRV_noinc ((SV *)av);
2154}
2155
2156/* semaphore */
2157
2158static void
2159coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2160{
2161 SV *count_sv = AvARRAY (av)[0];
2162 IV count = SvIVX (count_sv);
2163
2164 count += adjust;
2165 SvIVX (count_sv) = count;
2166
2167 /* now wake up as many waiters as are expected to lock */
2168 while (count > 0 && AvFILLp (av) > 0)
2169 {
2170 SV *cb;
2171
2172 /* swap first two elements so we can shift a waiter */
2173 AvARRAY (av)[0] = AvARRAY (av)[1];
2174 AvARRAY (av)[1] = count_sv;
2175 cb = av_shift (av);
2176
2177 if (SvOBJECT (cb))
2178 api_ready (aTHX_ cb);
2179 else
2180 croak ("callbacks not yet supported");
2181
2182 SvREFCNT_dec (cb);
2183
2184 --count;
2185 }
2186}
2187
2188static void
2189coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2190{
2191 /* call $sem->adjust (0) to possibly wake up some other waiters */
2192 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2193}
2194
2195static int
2196slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2197{
2198 AV *av = (AV *)frame->data;
2199 SV *count_sv = AvARRAY (av)[0];
2200
2201 /* if we are about to throw, don't actually acquire the lock, just throw */
2202 if (CORO_THROW)
2203 return 0;
2204 else if (SvIVX (count_sv) > 0)
2205 {
2206 SvSTATE_current->on_destroy = 0;
2207
2208 if (acquire)
2209 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2210 else
2211 coro_semaphore_adjust (aTHX_ av, 0);
2212
2213 return 0;
2214 }
2215 else
2216 {
2217 int i;
2218 /* if we were woken up but can't down, we look through the whole */
2219 /* waiters list and only add us if we aren't in there already */
2220 /* this avoids some degenerate memory usage cases */
2221
2222 for (i = 1; i <= AvFILLp (av); ++i)
2223 if (AvARRAY (av)[i] == SvRV (coro_current))
2224 return 1;
2225
2226 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2227 return 1;
2228 }
2229}
2230
2231static int
2232slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2233{
2234 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2235}
2236
2237static int
2238slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2239{
2240 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2241}
2242
2243static void
2244slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2245{
2246 AV *av = (AV *)SvRV (arg [0]);
2247
2248 if (SvIVX (AvARRAY (av)[0]) > 0)
2249 {
2250 frame->data = (void *)av;
2251 frame->prepare = prepare_nop;
2252 }
2253 else
2254 {
2255 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2256
2257 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2258 frame->prepare = prepare_schedule;
2259
2260 /* to avoid race conditions when a woken-up coro gets terminated */
2261 /* we arrange for a temporary on_destroy that calls adjust (0) */
2262 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2263 }
2264}
2265
2266static void
2267slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2268{
2269 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2270 frame->check = slf_check_semaphore_down;
2271}
2272
2273static void
2274slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2275{
2276 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2277 frame->check = slf_check_semaphore_wait;
2278}
2279
2280/* signal */
2281
2282static void
2283coro_signal_wake (pTHX_ AV *av, int count)
2284{
2285 SvIVX (AvARRAY (av)[0]) = 0;
2286
2287 /* now signal count waiters */
2288 while (count > 0 && AvFILLp (av) > 0)
2289 {
2290 SV *cb;
2291
2292 /* swap first two elements so we can shift a waiter */
2293 cb = AvARRAY (av)[0];
2294 AvARRAY (av)[0] = AvARRAY (av)[1];
2295 AvARRAY (av)[1] = cb;
2296
2297 cb = av_shift (av);
2298
2299 api_ready (aTHX_ cb);
2300 sv_setiv (cb, 0); /* signal waiter */
2301 SvREFCNT_dec (cb);
2302
2303 --count;
2304 }
2305}
2306
2307static int
2308slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2309{
2310 /* if we are about to throw, also stop waiting */
2311 return SvROK ((SV *)frame->data) && !CORO_THROW;
2312}
2313
2314static void
2315slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2316{
2317 AV *av = (AV *)SvRV (arg [0]);
2318
2319 if (SvIVX (AvARRAY (av)[0]))
2320 {
2321 SvIVX (AvARRAY (av)[0]) = 0;
2322 frame->prepare = prepare_nop;
2323 frame->check = slf_check_nop;
2324 }
2325 else
2326 {
2327 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2328
2329 av_push (av, waiter);
2330
2331 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2332 frame->prepare = prepare_schedule;
2333 frame->check = slf_check_signal_wait;
2334 }
2335}
2336
2337/*****************************************************************************/
2338/* Coro::AIO */
2339
2340#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2341
2342/* helper storage struct */
2343struct io_state
2344{
2345 int errorno;
2346 I32 laststype; /* U16 in 5.10.0 */
2347 int laststatval;
2348 Stat_t statcache;
2349};
2350
2351static void
2352coro_aio_callback (pTHX_ CV *cv)
2353{
2354 dXSARGS;
2355 AV *state = (AV *)GENSUB_ARG;
2356 SV *coro = av_pop (state);
2357 SV *data_sv = newSV (sizeof (struct io_state));
2358
2359 av_extend (state, items);
2360
2361 sv_upgrade (data_sv, SVt_PV);
2362 SvCUR_set (data_sv, sizeof (struct io_state));
2363 SvPOK_only (data_sv);
2364
2365 {
2366 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2367
2368 data->errorno = errno;
2369 data->laststype = PL_laststype;
2370 data->laststatval = PL_laststatval;
2371 data->statcache = PL_statcache;
2372 }
2373
2374 /* now build the result vector out of all the parameters and the data_sv */
2375 {
2376 int i;
2377
2378 for (i = 0; i < items; ++i)
2379 av_push (state, SvREFCNT_inc_NN (ST (i)));
2380 }
2381
2382 av_push (state, data_sv);
2383
2384 api_ready (aTHX_ coro);
2385 SvREFCNT_dec (coro);
2386 SvREFCNT_dec ((AV *)state);
2387}
2388
2389static int
2390slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2391{
2392 AV *state = (AV *)frame->data;
2393
2394 /* if we are about to throw, return early */
2395 /* this does not cancel the aio request, but at least */
2396 /* it quickly returns */
2397 if (CORO_THROW)
2398 return 0;
2399
2400 /* one element that is an RV? repeat! */
2401 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2402 return 1;
2403
2404 /* restore status */
2405 {
2406 SV *data_sv = av_pop (state);
2407 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2408
2409 errno = data->errorno;
2410 PL_laststype = data->laststype;
2411 PL_laststatval = data->laststatval;
2412 PL_statcache = data->statcache;
2413
2414 SvREFCNT_dec (data_sv);
2415 }
2416
2417 /* push result values */
2418 {
2419 dSP;
2420 int i;
2421
2422 EXTEND (SP, AvFILLp (state) + 1);
2423 for (i = 0; i <= AvFILLp (state); ++i)
2424 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2425
2426 PUTBACK;
2427 }
871 2428
872 return 0; 2429 return 0;
873} 2430}
874 2431
875static void 2432static void
876api_ready (SV *coro) 2433slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
877{ 2434{
878 if (SvROK (coro)) 2435 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
879 coro = SvRV (coro);
880
881 coro_enq (SvREFCNT_inc (coro));
882}
883
884static void
885api_schedule (void)
886{
887 SV *prev, *next;
888
889 prev = SvRV (GvSV (coro_current)); 2436 SV *coro_hv = SvRV (coro_current);
890 next = coro_deq (PRIO_MIN); 2437 struct coro *coro = SvSTATE_hv (coro_hv);
891 2438
892 if (!next) 2439 /* put our coroutine id on the state arg */
893 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 2440 av_push (state, SvREFCNT_inc_NN (coro_hv));
894 2441
895 /* free this only after the transfer */ 2442 /* first see whether we have a non-zero priority and set it as AIO prio */
896 coro_mortal = prev; 2443 if (coro->prio)
897 SV_CORO (prev, "Coro::schedule"); 2444 {
2445 dSP;
898 2446
899 SvRV (GvSV (coro_current)) = next; 2447 static SV *prio_cv;
2448 static SV *prio_sv;
900 2449
901 SV_CORO (next, "Coro::schedule"); 2450 if (expect_false (!prio_cv))
2451 {
2452 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2453 prio_sv = newSViv (0);
2454 }
902 2455
903 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 2456 PUSHMARK (SP);
904 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 2457 sv_setiv (prio_sv, coro->prio);
905} 2458 XPUSHs (prio_sv);
906 2459
907static void 2460 PUTBACK;
908api_cede (void) 2461 call_sv (prio_cv, G_VOID | G_DISCARD);
909{ 2462 }
910 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
911 2463
912 api_schedule (); 2464 /* now call the original request */
913} 2465 {
2466 dSP;
2467 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2468 int i;
914 2469
2470 PUSHMARK (SP);
2471
2472 /* first push all args to the stack */
2473 EXTEND (SP, items + 1);
2474
2475 for (i = 0; i < items; ++i)
2476 PUSHs (arg [i]);
2477
2478 /* now push the callback closure */
2479 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2480
2481 /* now call the AIO function - we assume our request is uncancelable */
2482 PUTBACK;
2483 call_sv ((SV *)req, G_VOID | G_DISCARD);
2484 }
2485
2486 /* now that the requets is going, we loop toll we have a result */
2487 frame->data = (void *)state;
2488 frame->prepare = prepare_schedule;
2489 frame->check = slf_check_aio_req;
2490}
2491
2492static void
2493coro_aio_req_xs (pTHX_ CV *cv)
2494{
2495 dXSARGS;
2496
2497 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2498
2499 XSRETURN_EMPTY;
2500}
2501
2502/*****************************************************************************/
2503
915MODULE = Coro::State PACKAGE = Coro::State 2504MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
916 2505
917PROTOTYPES: ENABLE 2506PROTOTYPES: DISABLE
918 2507
919BOOT: 2508BOOT:
920{ /* {} necessary for stoopid perl-5.6.x */ 2509{
921 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2510#ifdef USE_ITHREADS
922 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2511# if CORO_PTHREAD
2512 coro_thx = PERL_GET_CONTEXT;
2513# endif
2514#endif
2515 BOOT_PAGESIZE;
2516
2517 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2518 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2519
2520 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2521 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2522 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2523
2524 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2525 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2526 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2527
923 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2528 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
924 2529
925 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2530 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
926 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2531 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
927 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2532 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
928 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2533 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
929
930 if (!padlist_cache)
931 padlist_cache = newHV ();
932 2534
933 main_mainstack = PL_mainstack; 2535 main_mainstack = PL_mainstack;
2536 main_top_env = PL_top_env;
934 2537
2538 while (main_top_env->je_prev)
2539 main_top_env = main_top_env->je_prev;
2540
2541 {
2542 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2543
2544 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2545 hv_store_ent (PL_custom_op_names, slf,
2546 newSVpv ("coro_slf", 0), 0);
2547
2548 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2549 hv_store_ent (PL_custom_op_descs, slf,
2550 newSVpv ("coro schedule like function", 0), 0);
2551 }
2552
935 coroapi.ver = CORO_API_VERSION; 2553 coroapi.ver = CORO_API_VERSION;
2554 coroapi.rev = CORO_API_REVISION;
2555
936 coroapi.transfer = api_transfer; 2556 coroapi.transfer = api_transfer;
937}
938 2557
939Coro::State 2558 coroapi.sv_state = SvSTATE_;
940_newprocess(args) 2559 coroapi.execute_slf = api_execute_slf;
941 SV * args 2560 coroapi.prepare_nop = prepare_nop;
942 PROTOTYPE: $ 2561 coroapi.prepare_schedule = prepare_schedule;
2562 coroapi.prepare_cede = prepare_cede;
2563 coroapi.prepare_cede_notself = prepare_cede_notself;
2564
2565 {
2566 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2567
2568 if (!svp) croak ("Time::HiRes is required");
2569 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2570
2571 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2572 }
2573
2574 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2575}
2576
2577SV *
2578new (char *klass, ...)
943 CODE: 2579 CODE:
944 Coro__State coro; 2580{
2581 struct coro *coro;
2582 MAGIC *mg;
2583 HV *hv;
2584 int i;
945 2585
946 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
947 croak ("Coro::State::_newprocess expects an arrayref");
948
949 Newz (0, coro, 1, struct coro); 2586 Newz (0, coro, 1, struct coro);
2587 coro->args = newAV ();
2588 coro->flags = CF_NEW;
950 2589
951 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2590 if (coro_first) coro_first->prev = coro;
952 coro->mainstack = 0; /* actual work is done inside transfer */ 2591 coro->next = coro_first;
953 coro->stack = 0; 2592 coro_first = coro;
954 2593
955 /* same as JMPENV_BOOTSTRAP */ 2594 coro->hv = hv = newHV ();
956 /* we might be able to recycle start_env, but safe is safe */ 2595 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
957 //Zero(&coro->start_env, 1, JMPENV); 2596 mg->mg_flags |= MGf_DUP;
958 coro->start_env.je_ret = -1; 2597 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
959 coro->start_env.je_mustcatch = TRUE;
960 2598
961 RETVAL = coro; 2599 av_extend (coro->args, items - 1);
2600 for (i = 1; i < items; i++)
2601 av_push (coro->args, newSVsv (ST (i)));
2602}
962 OUTPUT: 2603 OUTPUT:
963 RETVAL 2604 RETVAL
964 2605
965void 2606void
966transfer(prev, next, flags) 2607transfer (...)
967 SV *prev
968 SV *next
969 int flags
970 PROTOTYPE: @ 2608 PROTOTYPE: $$
971 CODE: 2609 CODE:
972 PUTBACK; 2610 CORO_EXECUTE_SLF_XS (slf_init_transfer);
973 SV_CORO (next, "Coro::transfer"); 2611
974 SV_CORO (prev, "Coro::transfer"); 2612bool
975 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 2613_destroy (SV *coro_sv)
976 SPAGAIN; 2614 CODE:
2615 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2616 OUTPUT:
2617 RETVAL
977 2618
978void 2619void
979DESTROY(coro)
980 Coro::State coro
981 CODE:
982
983 if (coro->mainstack && coro->mainstack != main_mainstack)
984 {
985 struct coro temp;
986
987 PUTBACK;
988 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
989 LOAD(aTHX_ coro);
990 SPAGAIN;
991
992 destroy_stacks (aTHX);
993
994 LOAD((&temp)); /* this will get rid of defsv etc.. */
995 SPAGAIN;
996
997 coro->mainstack = 0;
998 }
999
1000 deallocate_stack (coro);
1001 SvREFCNT_dec (coro->args);
1002 Safefree (coro);
1003
1004void
1005_exit(code) 2620_exit (int code)
1006 int code
1007 PROTOTYPE: $ 2621 PROTOTYPE: $
1008 CODE: 2622 CODE:
1009 _exit (code); 2623 _exit (code);
1010 2624
1011MODULE = Coro::State PACKAGE = Coro::Cont 2625int
2626cctx_stacksize (int new_stacksize = 0)
2627 PROTOTYPE: ;$
2628 CODE:
2629 RETVAL = cctx_stacksize;
2630 if (new_stacksize)
2631 {
2632 cctx_stacksize = new_stacksize;
2633 ++cctx_gen;
2634 }
2635 OUTPUT:
2636 RETVAL
1012 2637
1013# this is slightly dirty (should expose a c-level api) 2638int
2639cctx_max_idle (int max_idle = 0)
2640 PROTOTYPE: ;$
2641 CODE:
2642 RETVAL = cctx_max_idle;
2643 if (max_idle > 1)
2644 cctx_max_idle = max_idle;
2645 OUTPUT:
2646 RETVAL
2647
2648int
2649cctx_count ()
2650 PROTOTYPE:
2651 CODE:
2652 RETVAL = cctx_count;
2653 OUTPUT:
2654 RETVAL
2655
2656int
2657cctx_idle ()
2658 PROTOTYPE:
2659 CODE:
2660 RETVAL = cctx_idle;
2661 OUTPUT:
2662 RETVAL
1014 2663
1015void 2664void
1016yield(...) 2665list ()
1017 PROTOTYPE: @ 2666 PROTOTYPE:
2667 PPCODE:
2668{
2669 struct coro *coro;
2670 for (coro = coro_first; coro; coro = coro->next)
2671 if (coro->hv)
2672 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2673}
2674
2675void
2676call (Coro::State coro, SV *coderef)
2677 ALIAS:
2678 eval = 1
2679 CODE:
2680{
2681 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2682 {
2683 struct coro temp;
2684
2685 if (!(coro->flags & CF_RUNNING))
2686 {
2687 PUTBACK;
2688 save_perl (aTHX_ &temp);
2689 load_perl (aTHX_ coro);
2690 }
2691
2692 {
2693 dSP;
2694 ENTER;
2695 SAVETMPS;
2696 PUTBACK;
2697 PUSHSTACK;
2698 PUSHMARK (SP);
2699
2700 if (ix)
2701 eval_sv (coderef, 0);
2702 else
2703 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2704
2705 POPSTACK;
2706 SPAGAIN;
2707 FREETMPS;
2708 LEAVE;
2709 PUTBACK;
2710 }
2711
2712 if (!(coro->flags & CF_RUNNING))
2713 {
2714 save_perl (aTHX_ coro);
2715 load_perl (aTHX_ &temp);
2716 SPAGAIN;
2717 }
2718 }
2719}
2720
2721SV *
2722is_ready (Coro::State coro)
2723 PROTOTYPE: $
2724 ALIAS:
2725 is_ready = CF_READY
2726 is_running = CF_RUNNING
2727 is_new = CF_NEW
2728 is_destroyed = CF_DESTROYED
2729 CODE:
2730 RETVAL = boolSV (coro->flags & ix);
2731 OUTPUT:
2732 RETVAL
2733
2734void
2735throw (Coro::State self, SV *throw = &PL_sv_undef)
2736 PROTOTYPE: $;$
1018 CODE: 2737 CODE:
1019 static SV *returnstk; 2738{
1020 SV *sv; 2739 struct coro *current = SvSTATE_current;
1021 AV *defav = GvAV (PL_defgv); 2740 SV **throwp = self == current ? &CORO_THROW : &self->except;
1022 struct coro *prev, *next;
1023
1024 if (!returnstk)
1025 returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1026
1027 /* set up @_ -- ugly */
1028 av_clear (defav);
1029 av_fill (defav, items - 1);
1030 while (items--)
1031 av_store (defav, items, SvREFCNT_inc (ST(items)));
1032
1033 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1034 sv = av_pop ((AV *)SvRV (returnstk));
1035 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1036 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1037 SvREFCNT_dec (sv); 2741 SvREFCNT_dec (*throwp);
2742 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2743}
1038 2744
1039 transfer(aTHX_ prev, next, 0); 2745void
2746api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2747 PROTOTYPE: $;$
2748 C_ARGS: aTHX_ coro, flags
2749
2750SV *
2751has_cctx (Coro::State coro)
2752 PROTOTYPE: $
2753 CODE:
2754 RETVAL = boolSV (!!coro->cctx);
2755 OUTPUT:
2756 RETVAL
2757
2758int
2759is_traced (Coro::State coro)
2760 PROTOTYPE: $
2761 CODE:
2762 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2763 OUTPUT:
2764 RETVAL
2765
2766UV
2767rss (Coro::State coro)
2768 PROTOTYPE: $
2769 ALIAS:
2770 usecount = 1
2771 CODE:
2772 switch (ix)
2773 {
2774 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2775 case 1: RETVAL = coro->usecount; break;
2776 }
2777 OUTPUT:
2778 RETVAL
2779
2780void
2781force_cctx ()
2782 PROTOTYPE:
2783 CODE:
2784 SvSTATE_current->cctx->idle_sp = 0;
2785
2786void
2787swap_defsv (Coro::State self)
2788 PROTOTYPE: $
2789 ALIAS:
2790 swap_defav = 1
2791 CODE:
2792 if (!self->slot)
2793 croak ("cannot swap state with coroutine that has no saved state,");
2794 else
2795 {
2796 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2797 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2798
2799 SV *tmp = *src; *src = *dst; *dst = tmp;
2800 }
2801
1040 2802
1041MODULE = Coro::State PACKAGE = Coro 2803MODULE = Coro::State PACKAGE = Coro
1042 2804
1043# this is slightly dirty (should expose a c-level api)
1044
1045BOOT: 2805BOOT:
1046{ 2806{
1047 int i; 2807 int i;
2808
2809 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2810 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2811 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2812
2813 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2814 SvREADONLY_on (coro_current);
2815
1048 HV *stash = gv_stashpv ("Coro", TRUE); 2816 coro_stash = gv_stashpv ("Coro", TRUE);
1049 2817
1050 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2818 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1051 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2819 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1052 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2820 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1053 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2821 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1054 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2822 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1055 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2823 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1056
1057 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1058 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1059 2824
1060 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2825 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1061 coro_ready[i] = newAV (); 2826 coro_ready[i] = newAV ();
1062 2827
1063 { 2828 {
1064 SV *sv = perl_get_sv("Coro::API", 1); 2829 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1065 2830
1066 coroapi.schedule = api_schedule; 2831 coroapi.schedule = api_schedule;
1067 coroapi.cede = api_cede; 2832 coroapi.cede = api_cede;
2833 coroapi.cede_notself = api_cede_notself;
1068 coroapi.ready = api_ready; 2834 coroapi.ready = api_ready;
2835 coroapi.is_ready = api_is_ready;
1069 coroapi.nready = &coro_nready; 2836 coroapi.nready = coro_nready;
1070 coroapi.current = coro_current; 2837 coroapi.current = coro_current;
1071 2838
1072 GCoroAPI = &coroapi; 2839 /*GCoroAPI = &coroapi;*/
1073 sv_setiv(sv, (IV)&coroapi); 2840 sv_setiv (sv, (IV)&coroapi);
1074 SvREADONLY_on(sv); 2841 SvREADONLY_on (sv);
1075 } 2842 }
1076} 2843}
1077 2844
1078#if !PERL_MICRO
1079
1080void 2845void
1081ready(self) 2846schedule (...)
1082 SV * self 2847 CODE:
2848 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2849
2850void
2851cede (...)
2852 CODE:
2853 CORO_EXECUTE_SLF_XS (slf_init_cede);
2854
2855void
2856cede_notself (...)
2857 CODE:
2858 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2859
2860void
2861_set_current (SV *current)
1083 PROTOTYPE: $ 2862 PROTOTYPE: $
1084 CODE: 2863 CODE:
1085 api_ready (self); 2864 SvREFCNT_dec (SvRV (coro_current));
2865 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1086 2866
1087#endif 2867void
2868_set_readyhook (SV *hook)
2869 PROTOTYPE: $
2870 CODE:
2871 SvREFCNT_dec (coro_readyhook);
2872 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1088 2873
1089int 2874int
2875prio (Coro::State coro, int newprio = 0)
2876 PROTOTYPE: $;$
2877 ALIAS:
2878 nice = 1
2879 CODE:
2880{
2881 RETVAL = coro->prio;
2882
2883 if (items > 1)
2884 {
2885 if (ix)
2886 newprio = coro->prio - newprio;
2887
2888 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2889 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2890
2891 coro->prio = newprio;
2892 }
2893}
2894 OUTPUT:
2895 RETVAL
2896
2897SV *
2898ready (SV *self)
2899 PROTOTYPE: $
2900 CODE:
2901 RETVAL = boolSV (api_ready (aTHX_ self));
2902 OUTPUT:
2903 RETVAL
2904
2905int
1090nready(...) 2906nready (...)
1091 PROTOTYPE: 2907 PROTOTYPE:
1092 CODE: 2908 CODE:
1093 RETVAL = coro_nready; 2909 RETVAL = coro_nready;
1094 OUTPUT: 2910 OUTPUT:
1095 RETVAL 2911 RETVAL
1096 2912
2913# for async_pool speedup
1097void 2914void
1098schedule(...) 2915_pool_1 (SV *cb)
1099 PROTOTYPE:
1100 CODE: 2916 CODE:
1101 api_schedule (); 2917{
2918 HV *hv = (HV *)SvRV (coro_current);
2919 struct coro *coro = SvSTATE_hv ((SV *)hv);
2920 AV *defav = GvAV (PL_defgv);
2921 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2922 AV *invoke_av;
2923 int i, len;
2924
2925 if (!invoke)
2926 {
2927 SV *old = PL_diehook;
2928 PL_diehook = 0;
2929 SvREFCNT_dec (old);
2930 croak ("\3async_pool terminate\2\n");
2931 }
2932
2933 SvREFCNT_dec (coro->saved_deffh);
2934 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2935
2936 hv_store (hv, "desc", sizeof ("desc") - 1,
2937 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2938
2939 invoke_av = (AV *)SvRV (invoke);
2940 len = av_len (invoke_av);
2941
2942 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2943
2944 if (len > 0)
2945 {
2946 av_fill (defav, len - 1);
2947 for (i = 0; i < len; ++i)
2948 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2949 }
2950}
1102 2951
1103void 2952void
1104cede(...) 2953_pool_2 (SV *cb)
1105 PROTOTYPE:
1106 CODE: 2954 CODE:
2955{
2956 HV *hv = (HV *)SvRV (coro_current);
2957 struct coro *coro = SvSTATE_hv ((SV *)hv);
2958
2959 sv_setsv (cb, &PL_sv_undef);
2960
2961 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2962 coro->saved_deffh = 0;
2963
2964 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2965 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2966 {
2967 SV *old = PL_diehook;
2968 PL_diehook = 0;
2969 SvREFCNT_dec (old);
2970 croak ("\3async_pool terminate\2\n");
2971 }
2972
2973 av_clear (GvAV (PL_defgv));
2974 hv_store (hv, "desc", sizeof ("desc") - 1,
2975 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2976
2977 coro->prio = 0;
2978
2979 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2980 api_trace (aTHX_ coro_current, 0);
2981
2982 av_push (av_async_pool, newSVsv (coro_current));
2983}
2984
2985SV *
2986rouse_cb ()
2987 PROTOTYPE:
2988 CODE:
2989 RETVAL = coro_new_rouse_cb (aTHX);
2990 OUTPUT:
2991 RETVAL
2992
2993void
2994rouse_wait (SV *cb = 0)
2995 PROTOTYPE: ;$
2996 PPCODE:
2997 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
2998
2999
3000MODULE = Coro::State PACKAGE = PerlIO::cede
3001
3002BOOT:
3003 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3004
3005
3006MODULE = Coro::State PACKAGE = Coro::Semaphore
3007
3008SV *
3009new (SV *klass, SV *count = 0)
3010 CODE:
3011 RETVAL = sv_bless (
3012 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3013 GvSTASH (CvGV (cv))
3014 );
3015 OUTPUT:
3016 RETVAL
3017
3018# helper for Coro::Channel
3019SV *
3020_alloc (int count)
3021 CODE:
3022 RETVAL = coro_waitarray_new (aTHX_ count);
3023 OUTPUT:
3024 RETVAL
3025
3026SV *
3027count (SV *self)
3028 CODE:
3029 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3030 OUTPUT:
3031 RETVAL
3032
3033void
3034up (SV *self, int adjust = 1)
3035 ALIAS:
3036 adjust = 1
3037 CODE:
3038 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3039
3040void
3041down (SV *self)
3042 CODE:
3043 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3044
3045void
3046wait (SV *self)
3047 CODE:
3048 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3049
3050void
3051try (SV *self)
3052 PPCODE:
3053{
3054 AV *av = (AV *)SvRV (self);
3055 SV *count_sv = AvARRAY (av)[0];
3056 IV count = SvIVX (count_sv);
3057
3058 if (count > 0)
3059 {
3060 --count;
3061 SvIVX (count_sv) = count;
3062 XSRETURN_YES;
3063 }
3064 else
3065 XSRETURN_NO;
3066}
3067
3068void
3069waiters (SV *self)
3070 PPCODE:
3071{
3072 AV *av = (AV *)SvRV (self);
3073 int wcount = AvFILLp (av) + 1 - 1;
3074
3075 if (GIMME_V == G_SCALAR)
3076 XPUSHs (sv_2mortal (newSViv (wcount)));
3077 else
3078 {
3079 int i;
3080 EXTEND (SP, wcount);
3081 for (i = 1; i <= wcount; ++i)
3082 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3083 }
3084}
3085
3086MODULE = Coro::State PACKAGE = Coro::Signal
3087
3088SV *
3089new (SV *klass)
3090 CODE:
3091 RETVAL = sv_bless (
3092 coro_waitarray_new (aTHX_ 0),
3093 GvSTASH (CvGV (cv))
3094 );
3095 OUTPUT:
3096 RETVAL
3097
3098void
3099wait (SV *self)
3100 CODE:
3101 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3102
3103void
3104broadcast (SV *self)
3105 CODE:
3106{
3107 AV *av = (AV *)SvRV (self);
3108 coro_signal_wake (aTHX_ av, AvFILLp (av));
3109}
3110
3111void
3112send (SV *self)
3113 CODE:
3114{
3115 AV *av = (AV *)SvRV (self);
3116
3117 if (AvFILLp (av))
3118 coro_signal_wake (aTHX_ av, 1);
3119 else
3120 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3121}
3122
3123IV
3124awaited (SV *self)
3125 CODE:
3126 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3127 OUTPUT:
3128 RETVAL
3129
3130
3131MODULE = Coro::State PACKAGE = Coro::AnyEvent
3132
3133BOOT:
3134 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3135
3136void
3137_schedule (...)
3138 CODE:
3139{
3140 static int incede;
3141
1107 api_cede (); 3142 api_cede_notself (aTHX);
1108 3143
3144 ++incede;
3145 while (coro_nready >= incede && api_cede (aTHX))
3146 ;
3147
3148 sv_setsv (sv_activity, &PL_sv_undef);
3149 if (coro_nready >= incede)
3150 {
3151 PUSHMARK (SP);
3152 PUTBACK;
3153 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3154 }
3155
3156 --incede;
3157}
3158
3159
3160MODULE = Coro::State PACKAGE = Coro::AIO
3161
3162void
3163_register (char *target, char *proto, SV *req)
3164 CODE:
3165{
3166 HV *st;
3167 GV *gvp;
3168 CV *req_cv = sv_2cv (req, &st, &gvp, 0);
3169 /* newXSproto doesn't return the CV on 5.8 */
3170 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3171 sv_setpv ((SV *)slf_cv, proto);
3172 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3173}
3174

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