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Comparing Coro/Coro/State.xs (file contents):
Revision 1.15 by root, Wed Jul 25 04:14:38 2001 UTC vs.
Revision 1.335 by root, Thu Dec 4 04:31:41 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 "libcoro/coro.c" 11#include "patchlevel.h"
12
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
6 25
7#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
8# include <unistd.h> 27# include <unistd.h>
9# include <sys/mman.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
10#endif 35# endif
11 36# include <limits.h>
12#define MAY_FLUSH /* increases codesize */ 37# ifndef PAGESIZE
13 38# define PAGESIZE pagesize
14/* perl-related */ 39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
15#define TRANSFER_SAVE_DEFAV 0x00000001 40static long pagesize;
16#define TRANSFER_SAVE_DEFSV 0x00000002 41# else
17#define TRANSFER_SAVE_ERRSV 0x00000004 42# define BOOT_PAGESIZE (void)0
18/* c-related */ 43# endif
19#define TRANSFER_SAVE_CCTXT 0x00000008
20#ifdef CORO_LAZY_STACK
21# define TRANSFER_LAZY_STACK 0x00000010
22#else 44#else
23# define TRANSFER_LAZY_STACK 0x00000000 45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
48
49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
55
56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
63# ifndef PL_ppaddr
64# define PL_ppaddr ppaddr
24#endif 65# endif
66# ifndef call_sv
67# define call_sv perl_call_sv
68# endif
69# ifndef get_sv
70# define get_sv perl_get_sv
71# endif
72# ifndef get_cv
73# define get_cv perl_get_cv
74# endif
75# ifndef IS_PADGV
76# define IS_PADGV(v) 0
77# endif
78# ifndef IS_PADCONST
79# define IS_PADCONST(v) 0
80# endif
81#endif
25 82
26#define TRANSFER_SAVE_ALL (TRANSFER_SAVE_DEFAV|TRANSFER_SAVE_DEFSV \ 83/* 5.11 */
27 |TRANSFER_SAVE_ERRSV|TRANSFER_SAVE_CCTXT) 84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
28 87
29#define SUB_INIT "Coro::State::initialize" 88/* 5.10.0 */
30#define UCORO_STATE "_coro_state" 89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
31 92
32/* The next macro should delcare a variable stacklevel that contains and approximation 93/* 5.8.8 */
33 * to the current C stack pointer. It's property is that it changes with each call 94#ifndef GV_NOTQUAL
34 * and should be unique. */ 95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103#ifndef CvISXSUB
104# define CvISXSUB(cv) (CvXSUB (cv) ? TRUE : FALSE)
105#endif
106#ifndef Newx
107# define Newx(ptr,nitems,type) New (0,ptr,nitems,type)
108#endif
109
110/* 5.8.7 */
111#ifndef SvRV_set
112# define SvRV_set(s,v) SvRV(s) = (v)
113#endif
114
115#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
116# undef CORO_STACKGUARD
117#endif
118
119#ifndef CORO_STACKGUARD
120# define CORO_STACKGUARD 0
121#endif
122
123/* prefer perl internal functions over our own? */
124#ifndef CORO_PREFER_PERL_FUNCTIONS
125# define CORO_PREFER_PERL_FUNCTIONS 0
126#endif
127
128/* The next macros try to return the current stack pointer, in an as
129 * portable way as possible. */
130#if __GNUC__ >= 4
131# define dSTACKLEVEL int stacklevel_dummy
132# define STACKLEVEL __builtin_frame_address (0)
133#else
134# define dSTACKLEVEL volatile void *stacklevel
35#define dSTACKLEVEL void *stacklevel = &stacklevel 135# define STACKLEVEL ((void *)&stacklevel)
136#endif
36 137
37#define labs(l) ((l) >= 0 ? (l) : -(l)) 138#define IN_DESTRUCT PL_dirty
38 139
39/* this is actually not only the c stack but also c registers etc... */ 140#if __GNUC__ >= 3
141# define attribute(x) __attribute__(x)
142# define expect(expr,value) __builtin_expect ((expr),(value))
143# define INLINE static inline
144#else
145# define attribute(x)
146# define expect(expr,value) (expr)
147# define INLINE static
148#endif
149
150#define expect_false(expr) expect ((expr) != 0, 0)
151#define expect_true(expr) expect ((expr) != 0, 1)
152
153#define NOINLINE attribute ((noinline))
154
155#include "CoroAPI.h"
156#define GCoroAPI (&coroapi) /* very sneaky */
157
158#ifdef USE_ITHREADS
159# if CORO_PTHREAD
160static void *coro_thx;
161# endif
162#endif
163
164static double (*nvtime)(); /* so why doesn't it take void? */
165
166/* we hijack an hopefully unused CV flag for our purposes */
167#define CVf_SLF 0x4000
168static OP *pp_slf (pTHX);
169
170static U32 cctx_gen;
171static size_t cctx_stacksize = CORO_STACKSIZE;
172static struct CoroAPI coroapi;
173static AV *main_mainstack; /* used to differentiate between $main and others */
174static JMPENV *main_top_env;
175static HV *coro_state_stash, *coro_stash;
176static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
177
178static AV *av_destroy; /* destruction queue */
179static SV *sv_manager; /* the manager coro */
180static SV *sv_idle; /* $Coro::idle */
181
182static GV *irsgv; /* $/ */
183static GV *stdoutgv; /* *STDOUT */
184static SV *rv_diehook;
185static SV *rv_warnhook;
186static HV *hv_sig; /* %SIG */
187
188/* async_pool helper stuff */
189static SV *sv_pool_rss;
190static SV *sv_pool_size;
191static SV *sv_async_pool_idle; /* description string */
192static AV *av_async_pool; /* idle pool */
193static SV *sv_Coro; /* class string */
194static CV *cv_pool_handler;
195static CV *cv_coro_state_new;
196
197/* Coro::AnyEvent */
198static SV *sv_activity;
199
200static struct coro_cctx *cctx_first;
201static int cctx_count, cctx_idle;
202
203enum {
204 CC_MAPPED = 0x01,
205 CC_NOREUSE = 0x02, /* throw this away after tracing */
206 CC_TRACE = 0x04,
207 CC_TRACE_SUB = 0x08, /* trace sub calls */
208 CC_TRACE_LINE = 0x10, /* trace each statement */
209 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
210};
211
212/* this is a structure representing a c-level coroutine */
40typedef struct { 213typedef struct coro_cctx
41 int refcnt; /* pointer reference counter */ 214{
42 int usecnt; /* shared by how many coroutines */ 215 struct coro_cctx *next;
43 int gencnt; /* generation counter */
44 216
217 /* the stack */
218 void *sptr;
219 size_t ssize;
220
221 /* cpu state */
222 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
223 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
224 JMPENV *top_env;
45 coro_context cctx; 225 coro_context cctx;
46 226
47 void *sptr; 227 U32 gen;
48 long ssize; /* positive == mmap, otherwise malloc */ 228#if CORO_USE_VALGRIND
49} coro_stack; 229 int valgrind_id;
230#endif
231 unsigned char flags;
232} coro_cctx;
50 233
51static coro_stack main_stack = { 1, 0, 0 }; 234coro_cctx *cctx_current; /* the currently running cctx */
52 235
236/*****************************************************************************/
237
238enum {
239 CF_RUNNING = 0x0001, /* coroutine is running */
240 CF_READY = 0x0002, /* coroutine is ready */
241 CF_NEW = 0x0004, /* has never been switched to */
242 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
243};
244
245/* the structure where most of the perl state is stored, overlaid on the cxstack */
246typedef struct
247{
248 SV *defsv;
249 AV *defav;
250 SV *errsv;
251 SV *irsgv;
252 HV *hinthv;
253#define VAR(name,type) type name;
254# include "state.h"
255#undef VAR
256} perl_slots;
257
258#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
259
260/* this is a structure representing a perl-level coroutine */
53struct coro { 261struct coro {
54 /* the optional C context */ 262 /* the C coroutine allocated to this perl coroutine, if any */
55 coro_stack *stack; 263 coro_cctx *cctx;
56 void *cursp;
57 int gencnt;
58 264
59 /* optionally saved, might be zero */ 265 /* state data */
60 AV *defav; 266 struct CoroSLF slf_frame; /* saved slf frame */
61 SV *defsv;
62 SV *errsv;
63
64 /* saved global state not related to stacks */
65 U8 dowarn;
66
67 /* the stacks and related info (callchain etc..) */
68 PERL_SI *curstackinfo;
69 AV *curstack;
70 AV *mainstack; 267 AV *mainstack;
71 SV **stack_sp; 268 perl_slots *slot; /* basically the saved sp */
72 OP *op;
73 SV **curpad;
74 SV **stack_base;
75 SV **stack_max;
76 SV **tmps_stack;
77 I32 tmps_floor;
78 I32 tmps_ix;
79 I32 tmps_max;
80 I32 *markstack;
81 I32 *markstack_ptr;
82 I32 *markstack_max;
83 I32 *scopestack;
84 I32 scopestack_ix;
85 I32 scopestack_max;
86 ANY *savestack;
87 I32 savestack_ix;
88 I32 savestack_max;
89 OP **retstack;
90 I32 retstack_ix;
91 I32 retstack_max;
92 COP *curcop;
93 JMPENV start_env;
94 JMPENV *top_env;
95 269
270 CV *startcv; /* the CV to execute */
96 /* data associated with this coroutine (initial args) */ 271 AV *args; /* data associated with this coroutine (initial args) */
97 AV *args; 272 int refcnt; /* coroutines are refcounted, yes */
273 int flags; /* CF_ flags */
274 HV *hv; /* the perl hash associated with this coro, if any */
275 void (*on_destroy)(pTHX_ struct coro *coro);
276
277 /* statistics */
278 int usecount; /* number of transfers to this coro */
279
280 /* coro process data */
281 int prio;
282 SV *except; /* exception to be thrown */
283 SV *rouse_cb;
284
285 /* async_pool */
286 SV *saved_deffh;
287 SV *invoke_cb;
288 AV *invoke_av;
289
290 /* linked list */
291 struct coro *next, *prev;
98}; 292};
99 293
100typedef struct coro *Coro__State; 294typedef struct coro *Coro__State;
101typedef struct coro *Coro__State_or_hashref; 295typedef struct coro *Coro__State_or_hashref;
102 296
103static AV *main_mainstack; /* used to differentiate between $main and others */ 297/* the following variables are effectively part of the perl context */
104static HV *coro_state_stash; 298/* and get copied between struct coro and these variables */
105static SV *ucoro_state_sv; 299/* the mainr easonw e don't support windows process emulation */
106static U32 ucoro_state_hash; 300static struct CoroSLF slf_frame; /* the current slf frame */
107static HV *padlist_cache;
108 301
109/* mostly copied from op.c:cv_clone2 */ 302/** Coro ********************************************************************/
110STATIC AV * 303
111clone_padlist (AV *protopadlist) 304#define PRIO_MAX 3
305#define PRIO_HIGH 1
306#define PRIO_NORMAL 0
307#define PRIO_LOW -1
308#define PRIO_IDLE -3
309#define PRIO_MIN -4
310
311/* for Coro.pm */
312static SV *coro_current;
313static SV *coro_readyhook;
314static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
315static CV *cv_coro_run, *cv_coro_terminate;
316static struct coro *coro_first;
317#define coro_nready coroapi.nready
318
319/** lowlevel stuff **********************************************************/
320
321static SV *
322coro_get_sv (pTHX_ const char *name, int create)
112{ 323{
113 AV *av; 324#if PERL_VERSION_ATLEAST (5,10,0)
114 I32 ix; 325 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
115 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 326 get_sv (name, create);
116 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 327#endif
117 SV **pname = AvARRAY (protopad_name); 328 return get_sv (name, create);
118 SV **ppad = AvARRAY (protopad); 329}
119 I32 fname = AvFILLp (protopad_name); 330
120 I32 fpad = AvFILLp (protopad); 331static AV *
332coro_get_av (pTHX_ const char *name, int create)
333{
334#if PERL_VERSION_ATLEAST (5,10,0)
335 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
336 get_av (name, create);
337#endif
338 return get_av (name, create);
339}
340
341static HV *
342coro_get_hv (pTHX_ const char *name, int create)
343{
344#if PERL_VERSION_ATLEAST (5,10,0)
345 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
346 get_hv (name, create);
347#endif
348 return get_hv (name, create);
349}
350
351/* may croak */
352INLINE CV *
353coro_sv_2cv (pTHX_ SV *sv)
354{
355 HV *st;
356 GV *gvp;
357 return sv_2cv (sv, &st, &gvp, 0);
358}
359
360/*****************************************************************************/
361/* magic glue */
362
363#define CORO_MAGIC_type_cv 26
364#define CORO_MAGIC_type_state PERL_MAGIC_ext
365
366#define CORO_MAGIC_NN(sv, type) \
367 (expect_true (SvMAGIC (sv)->mg_type == type) \
368 ? SvMAGIC (sv) \
369 : mg_find (sv, type))
370
371#define CORO_MAGIC(sv, type) \
372 (expect_true (SvMAGIC (sv)) \
373 ? CORO_MAGIC_NN (sv, type) \
374 : 0)
375
376#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
377#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
378
379INLINE struct coro *
380SvSTATE_ (pTHX_ SV *coro)
381{
382 HV *stash;
383 MAGIC *mg;
384
385 if (SvROK (coro))
386 coro = SvRV (coro);
387
388 if (expect_false (SvTYPE (coro) != SVt_PVHV))
389 croak ("Coro::State object required");
390
391 stash = SvSTASH (coro);
392 if (expect_false (stash != coro_stash && stash != coro_state_stash))
393 {
394 /* very slow, but rare, check */
395 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
396 croak ("Coro::State object required");
397 }
398
399 mg = CORO_MAGIC_state (coro);
400 return (struct coro *)mg->mg_ptr;
401}
402
403#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
404
405/* faster than SvSTATE, but expects a coroutine hv */
406#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
407#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
408
409/*****************************************************************************/
410/* padlist management and caching */
411
412static AV *
413coro_derive_padlist (pTHX_ CV *cv)
414{
415 AV *padlist = CvPADLIST (cv);
121 AV *newpadlist, *newpad_name, *newpad; 416 AV *newpadlist, *newpad;
122 SV **npad;
123
124 newpad_name = newAV ();
125 for (ix = fname; ix >= 0; ix--)
126 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
127
128 newpad = newAV ();
129 av_fill (newpad, AvFILLp (protopad));
130 npad = AvARRAY (newpad);
131 417
132 newpadlist = newAV (); 418 newpadlist = newAV ();
133 AvREAL_off (newpadlist); 419 AvREAL_off (newpadlist);
134 av_store (newpadlist, 0, (SV *) newpad_name); 420#if PERL_VERSION_ATLEAST (5,10,0)
421 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
422#else
423 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
424#endif
425 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
426 --AvFILLp (padlist);
427
428 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
135 av_store (newpadlist, 1, (SV *) newpad); 429 av_store (newpadlist, 1, (SV *)newpad);
136 430
137 av = newAV (); /* will be @_ */ 431 return newpadlist;
138 av_extend (av, 0); 432}
139 av_store (newpad, 0, (SV *) av);
140 AvFLAGS (av) = AVf_REIFY;
141 433
142 for (ix = fpad; ix > 0; ix--) 434static void
435free_padlist (pTHX_ AV *padlist)
436{
437 /* may be during global destruction */
438 if (!IN_DESTRUCT)
143 { 439 {
144 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 440 I32 i = AvFILLp (padlist);
145 if (namesv && namesv != &PL_sv_undef) 441
442 while (i > 0) /* special-case index 0 */
146 { 443 {
147 char *name = SvPVX (namesv); /* XXX */ 444 /* we try to be extra-careful here */
148 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 445 AV *av = (AV *)AvARRAY (padlist)[i--];
149 { /* lexical from outside? */ 446 I32 j = AvFILLp (av);
150 npad[ix] = SvREFCNT_inc (ppad[ix]); 447
151 } 448 while (j >= 0)
152 else 449 SvREFCNT_dec (AvARRAY (av)[j--]);
153 { /* our own lexical */ 450
154 SV *sv; 451 AvFILLp (av) = -1;
155 if (*name == '&') 452 SvREFCNT_dec (av);
156 sv = SvREFCNT_inc (ppad[ix]);
157 else if (*name == '@')
158 sv = (SV *) newAV ();
159 else if (*name == '%')
160 sv = (SV *) newHV ();
161 else
162 sv = NEWSV (0, 0);
163 if (!SvPADBUSY (sv))
164 SvPADMY_on (sv);
165 npad[ix] = sv;
166 }
167 } 453 }
168 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
169 {
170 npad[ix] = SvREFCNT_inc (ppad[ix]);
171 }
172 else
173 {
174 SV *sv = NEWSV (0, 0);
175 SvPADTMP_on (sv);
176 npad[ix] = sv;
177 }
178 }
179 454
180#if 0 /* return -ENOTUNDERSTOOD */ 455 SvREFCNT_dec (AvARRAY (padlist)[0]);
181 /* Now that vars are all in place, clone nested closures. */
182 456
183 for (ix = fpad; ix > 0; ix--) {
184 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
185 if (namesv
186 && namesv != &PL_sv_undef
187 && !(SvFLAGS(namesv) & SVf_FAKE)
188 && *SvPVX(namesv) == '&'
189 && CvCLONE(ppad[ix]))
190 {
191 CV *kid = cv_clone((CV*)ppad[ix]);
192 SvREFCNT_dec(ppad[ix]);
193 CvCLONE_on(kid);
194 SvPADMY_on(kid);
195 npad[ix] = (SV*)kid;
196 }
197 }
198#endif
199
200 return newpadlist;
201}
202
203#ifdef MAY_FLUSH
204STATIC AV *
205free_padlist (AV *padlist)
206{
207 /* may be during global destruction */
208 if (SvREFCNT(padlist))
209 {
210 I32 i = AvFILLp(padlist); 457 AvFILLp (padlist) = -1;
211 while (i >= 0)
212 {
213 SV **svp = av_fetch(padlist, i--, FALSE);
214 SV *sv = svp ? *svp : Nullsv;
215 if (sv)
216 SvREFCNT_dec(sv);
217 }
218
219 SvREFCNT_dec((SV*)padlist); 458 SvREFCNT_dec ((SV*)padlist);
220 } 459 }
221} 460}
222#endif 461
462static int
463coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
464{
465 AV *padlist;
466 AV *av = (AV *)mg->mg_obj;
467
468 /* casting is fun. */
469 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
470 free_padlist (aTHX_ padlist);
471
472 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
473
474 return 0;
475}
476
477static MGVTBL coro_cv_vtbl = {
478 0, 0, 0, 0,
479 coro_cv_free
480};
223 481
224/* the next two functions merely cache the padlists */ 482/* the next two functions merely cache the padlists */
225STATIC void 483static void
226get_padlist (CV *cv) 484get_padlist (pTHX_ CV *cv)
227{ 485{
228 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0); 486 MAGIC *mg = CORO_MAGIC_cv (cv);
487 AV *av;
229 488
230 if (he && AvFILLp ((AV *)*he) >= 0) 489 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
231 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he); 490 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
232 else 491 else
233 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
234}
235
236STATIC void
237put_padlist (CV *cv)
238{
239 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
240
241 if (SvTYPE (*he) != SVt_PVAV)
242 { 492 {
493#if CORO_PREFER_PERL_FUNCTIONS
494 /* this is probably cleaner? but also slower! */
495 /* in practise, it seems to be less stable */
496 CV *cp = Perl_cv_clone (aTHX_ cv);
497 CvPADLIST (cv) = CvPADLIST (cp);
498 CvPADLIST (cp) = 0;
243 SvREFCNT_dec (*he); 499 SvREFCNT_dec (cp);
244 *he = (SV *)newAV (); 500#else
501 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
502#endif
245 } 503 }
246
247 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
248} 504}
249 505
250#ifdef MAY_FLUSH
251STATIC void
252flush_padlist_cache ()
253{
254 HV *hv = padlist_cache;
255 padlist_cache = newHV ();
256
257 if (hv_iterinit (hv))
258 {
259 HE *he;
260 AV *padlist;
261
262 while (!!(he = hv_iternext (hv)))
263 {
264 AV *av = (AV *)HeVAL(he);
265
266 /* casting is fun. */
267 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
268 free_padlist (padlist);
269 }
270 }
271
272 SvREFCNT_dec (hv);
273}
274#endif
275
276#define SB do {
277#define SE } while (0)
278
279#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE
280#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE
281
282#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
283
284static void 506static void
507put_padlist (pTHX_ CV *cv)
508{
509 MAGIC *mg = CORO_MAGIC_cv (cv);
510 AV *av;
511
512 if (expect_false (!mg))
513 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
514
515 av = (AV *)mg->mg_obj;
516
517 if (expect_false (AvFILLp (av) >= AvMAX (av)))
518 av_extend (av, AvFILLp (av) + 1);
519
520 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
521}
522
523/** load & save, init *******************************************************/
524
525static void
285load_state(pTHX_ Coro__State c) 526load_perl (pTHX_ Coro__State c)
286{ 527{
287 PL_dowarn = c->dowarn; 528 perl_slots *slot = c->slot;
529 c->slot = 0;
288 530
289 PL_curstackinfo = c->curstackinfo;
290 PL_curstack = c->curstack;
291 PL_mainstack = c->mainstack; 531 PL_mainstack = c->mainstack;
292 PL_stack_sp = c->stack_sp;
293 PL_op = c->op;
294 PL_curpad = c->curpad;
295 PL_stack_base = c->stack_base;
296 PL_stack_max = c->stack_max;
297 PL_tmps_stack = c->tmps_stack;
298 PL_tmps_floor = c->tmps_floor;
299 PL_tmps_ix = c->tmps_ix;
300 PL_tmps_max = c->tmps_max;
301 PL_markstack = c->markstack;
302 PL_markstack_ptr = c->markstack_ptr;
303 PL_markstack_max = c->markstack_max;
304 PL_scopestack = c->scopestack;
305 PL_scopestack_ix = c->scopestack_ix;
306 PL_scopestack_max = c->scopestack_max;
307 PL_savestack = c->savestack;
308 PL_savestack_ix = c->savestack_ix;
309 PL_savestack_max = c->savestack_max;
310 PL_retstack = c->retstack;
311 PL_retstack_ix = c->retstack_ix;
312 PL_retstack_max = c->retstack_max;
313 PL_curcop = c->curcop;
314 PL_start_env = c->start_env;
315 PL_top_env = c->top_env;
316 532
317 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 533 GvSV (PL_defgv) = slot->defsv;
318 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 534 GvAV (PL_defgv) = slot->defav;
319 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 535 GvSV (PL_errgv) = slot->errsv;
536 GvSV (irsgv) = slot->irsgv;
537 GvHV (PL_hintgv) = slot->hinthv;
538
539 #define VAR(name,type) PL_ ## name = slot->name;
540 # include "state.h"
541 #undef VAR
320 542
321 { 543 {
322 dSP; 544 dSP;
545
323 CV *cv; 546 CV *cv;
324 547
325 /* now do the ugly restore mess */ 548 /* now do the ugly restore mess */
326 while ((cv = (CV *)POPs)) 549 while (expect_true (cv = (CV *)POPs))
327 { 550 {
328 AV *padlist = (AV *)POPs;
329
330 if (padlist)
331 {
332 put_padlist (cv); /* mark this padlist as available */ 551 put_padlist (aTHX_ cv); /* mark this padlist as available */
333 CvPADLIST(cv) = padlist; 552 CvDEPTH (cv) = PTR2IV (POPs);
334#ifdef USE_THREADS 553 CvPADLIST (cv) = (AV *)POPs;
335 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
336#endif
337 }
338
339 ++CvDEPTH(cv);
340 } 554 }
341 555
342 PUTBACK; 556 PUTBACK;
343 } 557 }
344}
345 558
559 slf_frame = c->slf_frame;
560 CORO_THROW = c->except;
561}
562
346static void 563static void
347save_state(pTHX_ Coro__State c, int flags) 564save_perl (pTHX_ Coro__State c)
348{ 565{
566 c->except = CORO_THROW;
567 c->slf_frame = slf_frame;
568
349 { 569 {
350 dSP; 570 dSP;
351 I32 cxix = cxstack_ix; 571 I32 cxix = cxstack_ix;
352 PERL_CONTEXT *ccstk = cxstack; 572 PERL_CONTEXT *ccstk = cxstack;
353 PERL_SI *top_si = PL_curstackinfo; 573 PERL_SI *top_si = PL_curstackinfo;
… …
355 /* 575 /*
356 * the worst thing you can imagine happens first - we have to save 576 * the worst thing you can imagine happens first - we have to save
357 * (and reinitialize) all cv's in the whole callchain :( 577 * (and reinitialize) all cv's in the whole callchain :(
358 */ 578 */
359 579
360 PUSHs (Nullsv); 580 XPUSHs (Nullsv);
361 /* this loop was inspired by pp_caller */ 581 /* this loop was inspired by pp_caller */
362 for (;;) 582 for (;;)
363 { 583 {
364 do 584 while (expect_true (cxix >= 0))
365 { 585 {
366 PERL_CONTEXT *cx = &ccstk[cxix--]; 586 PERL_CONTEXT *cx = &ccstk[cxix--];
367 587
368 if (CxTYPE(cx) == CXt_SUB) 588 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
369 { 589 {
370 CV *cv = cx->blk_sub.cv; 590 CV *cv = cx->blk_sub.cv;
591
371 if (CvDEPTH(cv)) 592 if (expect_true (CvDEPTH (cv)))
372 { 593 {
373#ifdef USE_THREADS
374 /*XPUSHs ((SV *)CvOWNER(cv));*/
375 /*CvOWNER(cv) = 0;*/
376 /*error must unlock this cv etc.. etc...*/
377#endif
378 EXTEND (SP, CvDEPTH(cv)*2); 594 EXTEND (SP, 3);
379
380 while (--CvDEPTH(cv))
381 {
382 /* this tells the restore code to increment CvDEPTH */
383 PUSHs (Nullsv);
384 PUSHs ((SV *)cv);
385 }
386
387 PUSHs ((SV *)CvPADLIST(cv)); 595 PUSHs ((SV *)CvPADLIST (cv));
596 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
388 PUSHs ((SV *)cv); 597 PUSHs ((SV *)cv);
389 598
390 get_padlist (cv); /* this is a monster */ 599 CvDEPTH (cv) = 0;
600 get_padlist (aTHX_ cv);
391 } 601 }
392 } 602 }
393 else if (CxTYPE(cx) == CXt_FORMAT)
394 {
395 /* I never used formats, so how should I know how these are implemented? */
396 /* my bold guess is as a simple, plain sub... */
397 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
398 }
399 } 603 }
400 while (cxix >= 0);
401 604
402 if (top_si->si_type == PERLSI_MAIN) 605 if (expect_true (top_si->si_type == PERLSI_MAIN))
403 break; 606 break;
404 607
405 top_si = top_si->si_prev; 608 top_si = top_si->si_prev;
406 ccstk = top_si->si_cxstack; 609 ccstk = top_si->si_cxstack;
407 cxix = top_si->si_cxix; 610 cxix = top_si->si_cxix;
408 } 611 }
409 612
410 PUTBACK; 613 PUTBACK;
411 } 614 }
412 615
413 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 616 /* allocate some space on the context stack for our purposes */
414 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 617 /* we manually unroll here, as usually 2 slots is enough */
415 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 618 if (SLOT_COUNT >= 1) CXINC;
619 if (SLOT_COUNT >= 2) CXINC;
620 if (SLOT_COUNT >= 3) CXINC;
621 {
622 int i;
623 for (i = 3; i < SLOT_COUNT; ++i)
624 CXINC;
625 }
626 cxstack_ix -= SLOT_COUNT; /* undo allocation */
416 627
417 /* I have not the slightest idea of why av_reify is necessary */
418 /* but if it's missing the defav contents magically get replaced sometimes */
419 if (c->defav)
420 av_reify (c->defav);
421
422 c->dowarn = PL_dowarn;
423
424 c->curstackinfo = PL_curstackinfo;
425 c->curstack = PL_curstack;
426 c->mainstack = PL_mainstack; 628 c->mainstack = PL_mainstack;
427 c->stack_sp = PL_stack_sp; 629
428 c->op = PL_op; 630 {
429 c->curpad = PL_curpad; 631 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
430 c->stack_base = PL_stack_base; 632
431 c->stack_max = PL_stack_max; 633 slot->defav = GvAV (PL_defgv);
432 c->tmps_stack = PL_tmps_stack; 634 slot->defsv = DEFSV;
433 c->tmps_floor = PL_tmps_floor; 635 slot->errsv = ERRSV;
434 c->tmps_ix = PL_tmps_ix; 636 slot->irsgv = GvSV (irsgv);
435 c->tmps_max = PL_tmps_max; 637 slot->hinthv = GvHV (PL_hintgv);
436 c->markstack = PL_markstack; 638
437 c->markstack_ptr = PL_markstack_ptr; 639 #define VAR(name,type) slot->name = PL_ ## name;
438 c->markstack_max = PL_markstack_max; 640 # include "state.h"
439 c->scopestack = PL_scopestack; 641 #undef VAR
440 c->scopestack_ix = PL_scopestack_ix; 642 }
441 c->scopestack_max = PL_scopestack_max;
442 c->savestack = PL_savestack;
443 c->savestack_ix = PL_savestack_ix;
444 c->savestack_max = PL_savestack_max;
445 c->retstack = PL_retstack;
446 c->retstack_ix = PL_retstack_ix;
447 c->retstack_max = PL_retstack_max;
448 c->curcop = PL_curcop;
449 c->start_env = PL_start_env;
450 c->top_env = PL_top_env;
451} 643}
452 644
453/* 645/*
454 * allocate various perl stacks. This is an exact copy 646 * allocate various perl stacks. This is almost an exact copy
455 * of perl.c:init_stacks, except that it uses less memory 647 * of perl.c:init_stacks, except that it uses less memory
456 * on the assumption that coroutines do not usually need 648 * on the (sometimes correct) assumption that coroutines do
457 * a lot of stackspace. 649 * not usually need a lot of stackspace.
458 */ 650 */
459STATIC void 651#if CORO_PREFER_PERL_FUNCTIONS
652# define coro_init_stacks(thx) init_stacks ()
653#else
654static void
460coro_init_stacks (pTHX) 655coro_init_stacks (pTHX)
461{ 656{
462 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 657 PL_curstackinfo = new_stackinfo(32, 8);
463 PL_curstackinfo->si_type = PERLSI_MAIN; 658 PL_curstackinfo->si_type = PERLSI_MAIN;
464 PL_curstack = PL_curstackinfo->si_stack; 659 PL_curstack = PL_curstackinfo->si_stack;
465 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 660 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
466 661
467 PL_stack_base = AvARRAY(PL_curstack); 662 PL_stack_base = AvARRAY(PL_curstack);
468 PL_stack_sp = PL_stack_base; 663 PL_stack_sp = PL_stack_base;
469 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 664 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
470 665
471 New(50,PL_tmps_stack,96,SV*); 666 New(50,PL_tmps_stack,32,SV*);
472 PL_tmps_floor = -1; 667 PL_tmps_floor = -1;
473 PL_tmps_ix = -1; 668 PL_tmps_ix = -1;
474 PL_tmps_max = 96; 669 PL_tmps_max = 32;
475 670
476 New(54,PL_markstack,16,I32); 671 New(54,PL_markstack,16,I32);
477 PL_markstack_ptr = PL_markstack; 672 PL_markstack_ptr = PL_markstack;
478 PL_markstack_max = PL_markstack + 16; 673 PL_markstack_max = PL_markstack + 16;
479 674
675#ifdef SET_MARK_OFFSET
480 SET_MARK_OFFSET; 676 SET_MARK_OFFSET;
677#endif
481 678
482 New(54,PL_scopestack,16,I32); 679 New(54,PL_scopestack,8,I32);
483 PL_scopestack_ix = 0; 680 PL_scopestack_ix = 0;
484 PL_scopestack_max = 16; 681 PL_scopestack_max = 8;
485 682
486 New(54,PL_savestack,96,ANY); 683 New(54,PL_savestack,24,ANY);
487 PL_savestack_ix = 0; 684 PL_savestack_ix = 0;
488 PL_savestack_max = 96; 685 PL_savestack_max = 24;
489 686
687#if !PERL_VERSION_ATLEAST (5,10,0)
490 New(54,PL_retstack,8,OP*); 688 New(54,PL_retstack,4,OP*);
491 PL_retstack_ix = 0; 689 PL_retstack_ix = 0;
492 PL_retstack_max = 8; 690 PL_retstack_max = 4;
691#endif
493} 692}
693#endif
494 694
495/* 695/*
496 * destroy the stacks, the callchain etc... 696 * destroy the stacks, the callchain etc...
497 * still there is a memleak of 128 bytes...
498 */ 697 */
499STATIC void 698static void
500destroy_stacks(pTHX) 699coro_destruct_stacks (pTHX)
501{ 700{
502 /* is this ugly, I ask? */
503 while (PL_scopestack_ix)
504 LEAVE;
505
506 /* sure it is, but more important: is it correct?? :/ */
507 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
508 FREETMPS;
509
510 while (PL_curstackinfo->si_next) 701 while (PL_curstackinfo->si_next)
511 PL_curstackinfo = PL_curstackinfo->si_next; 702 PL_curstackinfo = PL_curstackinfo->si_next;
512 703
513 while (PL_curstackinfo) 704 while (PL_curstackinfo)
514 { 705 {
515 PERL_SI *p = PL_curstackinfo->si_prev; 706 PERL_SI *p = PL_curstackinfo->si_prev;
516 707
517 { 708 if (!IN_DESTRUCT)
518 dSP;
519 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
520 PUTBACK; /* possibly superfluous */
521 }
522
523 dounwind(-1);
524
525 SvREFCNT_dec(PL_curstackinfo->si_stack); 709 SvREFCNT_dec (PL_curstackinfo->si_stack);
710
526 Safefree(PL_curstackinfo->si_cxstack); 711 Safefree (PL_curstackinfo->si_cxstack);
527 Safefree(PL_curstackinfo); 712 Safefree (PL_curstackinfo);
528 PL_curstackinfo = p; 713 PL_curstackinfo = p;
529 } 714 }
530 715
531 Safefree(PL_tmps_stack); 716 Safefree (PL_tmps_stack);
532 Safefree(PL_markstack); 717 Safefree (PL_markstack);
533 Safefree(PL_scopestack); 718 Safefree (PL_scopestack);
534 Safefree(PL_savestack); 719 Safefree (PL_savestack);
720#if !PERL_VERSION_ATLEAST (5,10,0)
535 Safefree(PL_retstack); 721 Safefree (PL_retstack);
536}
537
538static void
539allocate_stack (Coro__State ctx, int alloc)
540{
541 coro_stack *stack;
542
543 New (0, stack, 1, coro_stack);
544
545 stack->refcnt = 1;
546 stack->usecnt = 1;
547 stack->gencnt = ctx->gencnt = 0;
548 if (alloc)
549 {
550#ifdef HAVE_MMAP
551 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-use */
552 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
553 if (stack->sptr == (void *)-1)
554#endif 722#endif
723}
724
725#define CORO_RSS \
726 rss += sizeof (SYM (curstackinfo)); \
727 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
728 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
729 rss += SYM (tmps_max) * sizeof (SV *); \
730 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
731 rss += SYM (scopestack_max) * sizeof (I32); \
732 rss += SYM (savestack_max) * sizeof (ANY);
733
734static size_t
735coro_rss (pTHX_ struct coro *coro)
736{
737 size_t rss = sizeof (*coro);
738
739 if (coro->mainstack)
740 {
741 if (coro->flags & CF_RUNNING)
555 { 742 {
556 /*FIXME*//*D*//* reasonable stack size! */ 743 #define SYM(sym) PL_ ## sym
557 stack->ssize = -4096 * sizeof (long); 744 CORO_RSS;
558 New (0, stack->sptr, 4096, long); 745 #undef SYM
559 } 746 }
560 }
561 else 747 else
562 stack->sptr = 0;
563
564 ctx->stack = stack;
565}
566
567static void
568deallocate_stack (Coro__State ctx)
569{
570 coro_stack *stack = ctx->stack;
571
572 ctx->stack = 0;
573
574 if (stack)
575 {
576 if (!--stack->refcnt)
577 { 748 {
578#ifdef HAVE_MMAP 749 #define SYM(sym) coro->slot->sym
579 if (stack->ssize > 0 && stack->sptr) 750 CORO_RSS;
580 munmap (stack->sptr, stack->ssize); 751 #undef SYM
581 else
582#else
583 Safefree (stack->sptr);
584#endif
585 Safefree (stack);
586 } 752 }
587 else if (ctx->gencnt == stack->gencnt) 753 }
588 --stack->usecnt; 754
755 return rss;
756}
757
758/** coroutine stack handling ************************************************/
759
760static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
761static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
762static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
763
764/* apparently < 5.8.8 */
765#ifndef MgPV_nolen_const
766#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
767 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
768 (const char*)(mg)->mg_ptr)
769#endif
770
771/*
772 * This overrides the default magic get method of %SIG elements.
773 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
774 * and instead of tryign to save and restore the hash elements, we just provide
775 * readback here.
776 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
777 * not expecting this to actually change the hook. This is a potential problem
778 * when a schedule happens then, but we ignore this.
779 */
780static int
781coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
782{
783 const char *s = MgPV_nolen_const (mg);
784
785 if (*s == '_')
589 } 786 {
590} 787 SV **svp = 0;
591 788
789 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
790 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
791
792 if (svp)
793 {
794 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
795 return 0;
796 }
797 }
798
799 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
800}
801
592static void 802static int
593setup_coro (void *arg) 803coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
804{
805 const char *s = MgPV_nolen_const (mg);
806
807 if (*s == '_')
808 {
809 SV **svp = 0;
810
811 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
812 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
813
814 if (svp)
815 {
816 SV *old = *svp;
817 *svp = 0;
818 SvREFCNT_dec (old);
819 return 0;
820 }
821 }
822
823 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
824}
825
826static int
827coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
828{
829 const char *s = MgPV_nolen_const (mg);
830
831 if (*s == '_')
832 {
833 SV **svp = 0;
834
835 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
836 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
837
838 if (svp)
839 {
840 SV *old = *svp;
841 *svp = newSVsv (sv);
842 SvREFCNT_dec (old);
843 return 0;
844 }
845 }
846
847 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
848}
849
850static void
851prepare_nop (pTHX_ struct coro_transfer_args *ta)
852{
853 /* kind of mega-hacky, but works */
854 ta->next = ta->prev = (struct coro *)ta;
855}
856
857static int
858slf_check_nop (pTHX_ struct CoroSLF *frame)
859{
860 return 0;
861}
862
863static int
864slf_check_repeat (pTHX_ struct CoroSLF *frame)
865{
866 return 1;
867}
868
869static UNOP coro_setup_op;
870
871static void NOINLINE /* noinline to keep it out of the transfer fast path */
872coro_setup (pTHX_ struct coro *coro)
594{ 873{
595 /* 874 /*
596 * emulate part of the perl startup here. 875 * emulate part of the perl startup here.
597 */ 876 */
598 dSP;
599 Coro__State ctx = (Coro__State)arg;
600 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
601
602 coro_init_stacks (aTHX); 877 coro_init_stacks (aTHX);
603 JMPENV_BOOTSTRAP;
604 SPAGAIN;
605 878
606 /*PL_curcop = 0;*/ 879 PL_runops = RUNOPS_DEFAULT;
880 PL_curcop = &PL_compiling;
881 PL_in_eval = EVAL_NULL;
882 PL_comppad = 0;
883 PL_comppad_name = 0;
884 PL_comppad_name_fill = 0;
885 PL_comppad_name_floor = 0;
886 PL_curpm = 0;
887 PL_curpad = 0;
888 PL_localizing = 0;
889 PL_dirty = 0;
890 PL_restartop = 0;
891#if PERL_VERSION_ATLEAST (5,10,0)
892 PL_parser = 0;
893#endif
894 PL_hints = 0;
895
896 /* recreate the die/warn hooks */
897 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
898 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
899
900 GvSV (PL_defgv) = newSV (0);
901 GvAV (PL_defgv) = coro->args; coro->args = 0;
902 GvSV (PL_errgv) = newSV (0);
903 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
904 GvHV (PL_hintgv) = 0;
905 PL_rs = newSVsv (GvSV (irsgv));
906 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
907
908 {
909 dSP;
910 UNOP myop;
911
912 Zero (&myop, 1, UNOP);
913 myop.op_next = Nullop;
914 myop.op_type = OP_ENTERSUB;
915 myop.op_flags = OPf_WANT_VOID;
916
917 PUSHMARK (SP);
918 PUSHs ((SV *)coro->startcv);
919 PUTBACK;
920 PL_op = (OP *)&myop;
921 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
922 }
923
924 /* this newly created coroutine might be run on an existing cctx which most
925 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
926 */
927 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
928 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
929
930 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
931 coro_setup_op.op_next = PL_op;
932 coro_setup_op.op_type = OP_ENTERSUB;
933 coro_setup_op.op_ppaddr = pp_slf;
934 /* no flags etc. required, as an init function won't be called */
935
936 PL_op = (OP *)&coro_setup_op;
937
938 /* copy throw, in case it was set before coro_setup */
939 CORO_THROW = coro->except;
940}
941
942static void
943coro_destruct_perl (pTHX_ struct coro *coro)
944{
945 if (!IN_DESTRUCT)
946 {
947 /* restore all saved variables and stuff */
948 LEAVE_SCOPE (0);
949 assert (PL_tmps_floor == -1);
950
951 /* free all temporaries */
952 FREETMPS;
953 assert (PL_tmps_ix == -1);
954
955 /* unwind all extra stacks */
956 POPSTACK_TO (PL_mainstack);
957
958 /* unwind main stack */
959 dounwind (-1);
960 }
961
962 SvREFCNT_dec (GvSV (PL_defgv));
607 SvREFCNT_dec (GvAV (PL_defgv)); 963 SvREFCNT_dec (GvAV (PL_defgv));
608 GvAV (PL_defgv) = ctx->args; 964 SvREFCNT_dec (GvSV (PL_errgv));
965 SvREFCNT_dec (PL_defoutgv);
966 SvREFCNT_dec (PL_rs);
967 SvREFCNT_dec (GvSV (irsgv));
968 SvREFCNT_dec (GvHV (PL_hintgv));
609 969
970 SvREFCNT_dec (PL_diehook);
971 SvREFCNT_dec (PL_warnhook);
972
973 SvREFCNT_dec (coro->saved_deffh);
974 SvREFCNT_dec (coro->rouse_cb);
975 SvREFCNT_dec (coro->invoke_cb);
976 SvREFCNT_dec (coro->invoke_av);
977
978 coro_destruct_stacks (aTHX);
979}
980
981INLINE void
982free_coro_mortal (pTHX)
983{
984 if (expect_true (coro_mortal))
985 {
986 SvREFCNT_dec (coro_mortal);
987 coro_mortal = 0;
988 }
989}
990
991static int
992runops_trace (pTHX)
993{
994 COP *oldcop = 0;
995 int oldcxix = -2;
996
997 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
998 {
999 PERL_ASYNC_CHECK ();
1000
1001 if (cctx_current->flags & CC_TRACE_ALL)
1002 {
1003 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1004 {
1005 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1006 SV **bot, **top;
1007 AV *av = newAV (); /* return values */
1008 SV **cb;
1009 dSP;
1010
1011 GV *gv = CvGV (cx->blk_sub.cv);
1012 SV *fullname = sv_2mortal (newSV (0));
1013 if (isGV (gv))
1014 gv_efullname3 (fullname, gv, 0);
1015
1016 bot = PL_stack_base + cx->blk_oldsp + 1;
1017 top = cx->blk_gimme == G_ARRAY ? SP + 1
1018 : cx->blk_gimme == G_SCALAR ? bot + 1
1019 : bot;
1020
1021 av_extend (av, top - bot);
1022 while (bot < top)
1023 av_push (av, SvREFCNT_inc_NN (*bot++));
1024
1025 PL_runops = RUNOPS_DEFAULT;
1026 ENTER;
1027 SAVETMPS;
1028 EXTEND (SP, 3);
1029 PUSHMARK (SP);
1030 PUSHs (&PL_sv_no);
1031 PUSHs (fullname);
1032 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1033 PUTBACK;
1034 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1035 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1036 SPAGAIN;
1037 FREETMPS;
1038 LEAVE;
1039 PL_runops = runops_trace;
1040 }
1041
1042 if (oldcop != PL_curcop)
1043 {
1044 oldcop = PL_curcop;
1045
1046 if (PL_curcop != &PL_compiling)
1047 {
1048 SV **cb;
1049
1050 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1051 {
1052 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1053
1054 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1055 {
1056 dSP;
1057 GV *gv = CvGV (cx->blk_sub.cv);
1058 SV *fullname = sv_2mortal (newSV (0));
1059
1060 if (isGV (gv))
1061 gv_efullname3 (fullname, gv, 0);
1062
1063 PL_runops = RUNOPS_DEFAULT;
1064 ENTER;
1065 SAVETMPS;
1066 EXTEND (SP, 3);
1067 PUSHMARK (SP);
1068 PUSHs (&PL_sv_yes);
1069 PUSHs (fullname);
1070 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1071 PUTBACK;
1072 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1073 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1074 SPAGAIN;
1075 FREETMPS;
1076 LEAVE;
1077 PL_runops = runops_trace;
1078 }
1079
1080 oldcxix = cxstack_ix;
1081 }
1082
1083 if (cctx_current->flags & CC_TRACE_LINE)
1084 {
1085 dSP;
1086
1087 PL_runops = RUNOPS_DEFAULT;
1088 ENTER;
1089 SAVETMPS;
1090 EXTEND (SP, 3);
1091 PL_runops = RUNOPS_DEFAULT;
1092 PUSHMARK (SP);
1093 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1094 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1095 PUTBACK;
1096 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1097 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1098 SPAGAIN;
1099 FREETMPS;
1100 LEAVE;
1101 PL_runops = runops_trace;
1102 }
1103 }
1104 }
1105 }
1106 }
1107
1108 TAINT_NOT;
1109 return 0;
1110}
1111
1112static struct CoroSLF cctx_ssl_frame;
1113
1114static void
1115slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1116{
1117 ta->prev = 0;
1118}
1119
1120static int
1121slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1122{
1123 *frame = cctx_ssl_frame;
1124
1125 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1126}
1127
1128/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1129static void NOINLINE
1130cctx_prepare (pTHX)
1131{
1132 PL_top_env = &PL_start_env;
1133
1134 if (cctx_current->flags & CC_TRACE)
1135 PL_runops = runops_trace;
1136
1137 /* we already must be executing an SLF op, there is no other valid way
1138 * that can lead to creation of a new cctx */
1139 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1140 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1141
1142 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1143 cctx_ssl_frame = slf_frame;
1144
1145 slf_frame.prepare = slf_prepare_set_stacklevel;
1146 slf_frame.check = slf_check_set_stacklevel;
1147}
1148
1149/* the tail of transfer: execute stuff we can only do after a transfer */
1150INLINE void
1151transfer_tail (pTHX)
1152{
1153 free_coro_mortal (aTHX);
1154}
1155
1156/*
1157 * this is a _very_ stripped down perl interpreter ;)
1158 */
1159static void
1160cctx_run (void *arg)
1161{
1162#ifdef USE_ITHREADS
1163# if CORO_PTHREAD
1164 PERL_SET_CONTEXT (coro_thx);
1165# endif
1166#endif
1167 {
1168 dTHX;
1169
1170 /* normally we would need to skip the entersub here */
1171 /* not doing so will re-execute it, which is exactly what we want */
1172 /* PL_nop = PL_nop->op_next */
1173
1174 /* inject a fake subroutine call to cctx_init */
1175 cctx_prepare (aTHX);
1176
1177 /* cctx_run is the alternative tail of transfer() */
1178 transfer_tail (aTHX);
1179
1180 /* somebody or something will hit me for both perl_run and PL_restartop */
1181 PL_restartop = PL_op;
1182 perl_run (PL_curinterp);
1183 /*
1184 * Unfortunately, there is no way to get at the return values of the
1185 * coro body here, as perl_run destroys these
1186 */
1187
1188 /*
1189 * If perl-run returns we assume exit() was being called or the coro
1190 * fell off the end, which seems to be the only valid (non-bug)
1191 * reason for perl_run to return. We try to exit by jumping to the
1192 * bootstrap-time "top" top_env, as we cannot restore the "main"
1193 * coroutine as Coro has no such concept.
1194 * This actually isn't valid with the pthread backend, but OSes requiring
1195 * that backend are too broken to do it in a standards-compliant way.
1196 */
1197 PL_top_env = main_top_env;
1198 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1199 }
1200}
1201
1202static coro_cctx *
1203cctx_new ()
1204{
1205 coro_cctx *cctx;
1206
1207 ++cctx_count;
1208 New (0, cctx, 1, coro_cctx);
1209
1210 cctx->gen = cctx_gen;
1211 cctx->flags = 0;
1212 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1213
1214 return cctx;
1215}
1216
1217/* create a new cctx only suitable as source */
1218static coro_cctx *
1219cctx_new_empty ()
1220{
1221 coro_cctx *cctx = cctx_new ();
1222
1223 cctx->sptr = 0;
1224 coro_create (&cctx->cctx, 0, 0, 0, 0);
1225
1226 return cctx;
1227}
1228
1229/* create a new cctx suitable as destination/running a perl interpreter */
1230static coro_cctx *
1231cctx_new_run ()
1232{
1233 coro_cctx *cctx = cctx_new ();
1234 void *stack_start;
1235 size_t stack_size;
1236
1237#if HAVE_MMAP
1238 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1239 /* mmap supposedly does allocate-on-write for us */
1240 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1241
1242 if (cctx->sptr != (void *)-1)
1243 {
1244 #if CORO_STACKGUARD
1245 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1246 #endif
1247 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1248 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1249 cctx->flags |= CC_MAPPED;
1250 }
1251 else
1252#endif
1253 {
1254 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1255 New (0, cctx->sptr, cctx_stacksize, long);
1256
1257 if (!cctx->sptr)
1258 {
1259 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1260 _exit (EXIT_FAILURE);
1261 }
1262
1263 stack_start = cctx->sptr;
1264 stack_size = cctx->ssize;
1265 }
1266
1267 #if CORO_USE_VALGRIND
1268 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1269 #endif
1270
1271 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1272
1273 return cctx;
1274}
1275
1276static void
1277cctx_destroy (coro_cctx *cctx)
1278{
1279 if (!cctx)
1280 return;
1281
1282 assert (cctx != cctx_current);//D temporary
1283
1284 --cctx_count;
1285 coro_destroy (&cctx->cctx);
1286
1287 /* coro_transfer creates new, empty cctx's */
610 if (ctx->stack) 1288 if (cctx->sptr)
1289 {
1290 #if CORO_USE_VALGRIND
1291 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1292 #endif
1293
1294#if HAVE_MMAP
1295 if (cctx->flags & CC_MAPPED)
1296 munmap (cctx->sptr, cctx->ssize);
1297 else
1298#endif
1299 Safefree (cctx->sptr);
611 { 1300 }
612 ctx->cursp = 0;
613 1301
1302 Safefree (cctx);
1303}
1304
1305/* wether this cctx should be destructed */
1306#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1307
1308static coro_cctx *
1309cctx_get (pTHX)
1310{
1311 while (expect_true (cctx_first))
1312 {
1313 coro_cctx *cctx = cctx_first;
1314 cctx_first = cctx->next;
1315 --cctx_idle;
1316
1317 if (expect_true (!CCTX_EXPIRED (cctx)))
1318 return cctx;
1319
1320 cctx_destroy (cctx);
1321 }
1322
1323 return cctx_new_run ();
1324}
1325
1326static void
1327cctx_put (coro_cctx *cctx)
1328{
1329 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1330
1331 /* free another cctx if overlimit */
1332 if (expect_false (cctx_idle >= cctx_max_idle))
1333 {
1334 coro_cctx *first = cctx_first;
1335 cctx_first = first->next;
1336 --cctx_idle;
1337
1338 cctx_destroy (first);
1339 }
1340
1341 ++cctx_idle;
1342 cctx->next = cctx_first;
1343 cctx_first = cctx;
1344}
1345
1346/** coroutine switching *****************************************************/
1347
1348static void
1349transfer_check (pTHX_ struct coro *prev, struct coro *next)
1350{
1351 /* TODO: throwing up here is considered harmful */
1352
1353 if (expect_true (prev != next))
1354 {
1355 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1356 croak ("Coro::State::transfer called with a suspended prev Coro::State, but can only transfer from running or new states,");
1357
1358 if (expect_false (next->flags & CF_RUNNING))
1359 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1360
1361 if (expect_false (next->flags & CF_DESTROYED))
1362 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1363
1364#if !PERL_VERSION_ATLEAST (5,10,0)
1365 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1366 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1367#endif
1368 }
1369}
1370
1371/* always use the TRANSFER macro */
1372static void NOINLINE /* noinline so we have a fixed stackframe */
1373transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1374{
1375 dSTACKLEVEL;
1376
1377 /* sometimes transfer is only called to set idle_sp */
1378 if (expect_false (!prev))
1379 {
1380 cctx_current->idle_sp = STACKLEVEL;
1381 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1382 }
1383 else if (expect_true (prev != next))
1384 {
1385 coro_cctx *cctx_prev;
1386
1387 if (expect_false (prev->flags & CF_NEW))
1388 {
1389 /* create a new empty/source context */
1390 prev->flags &= ~CF_NEW;
1391 prev->flags |= CF_RUNNING;
1392 }
1393
1394 prev->flags &= ~CF_RUNNING;
1395 next->flags |= CF_RUNNING;
1396
1397 /* first get rid of the old state */
1398 save_perl (aTHX_ prev);
1399
1400 if (expect_false (next->flags & CF_NEW))
1401 {
1402 /* need to start coroutine */
1403 next->flags &= ~CF_NEW;
1404 /* setup coroutine call */
1405 coro_setup (aTHX_ next);
1406 }
1407 else
1408 load_perl (aTHX_ next);
1409
1410 assert (!prev->cctx);//D temporary
1411
1412 /* possibly untie and reuse the cctx */
1413 if (expect_true (
1414 cctx_current->idle_sp == STACKLEVEL
1415 && !(cctx_current->flags & CC_TRACE)
1416 && !force_cctx
1417 ))
1418 {
1419 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1420 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1421
1422 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1423 /* without this the next cctx_get might destroy the running cctx while still in use */
1424 if (expect_false (CCTX_EXPIRED (cctx_current)))
1425 if (expect_true (!next->cctx))
1426 next->cctx = cctx_get (aTHX);
1427
1428 cctx_put (cctx_current);
1429 }
1430 else
1431 prev->cctx = cctx_current;
1432
1433 ++next->usecount;
1434
1435 cctx_prev = cctx_current;
1436 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1437
1438 next->cctx = 0;
1439
1440 if (expect_false (cctx_prev != cctx_current))
1441 {
1442 cctx_prev->top_env = PL_top_env;
1443 PL_top_env = cctx_current->top_env;
1444 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1445 }
1446
1447 transfer_tail (aTHX);
1448 }
1449}
1450
1451#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1452#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1453
1454/** high level stuff ********************************************************/
1455
1456static int
1457coro_state_destroy (pTHX_ struct coro *coro)
1458{
1459 if (coro->flags & CF_DESTROYED)
1460 return 0;
1461
1462 if (coro->on_destroy)
1463 coro->on_destroy (aTHX_ coro);
1464
1465 coro->flags |= CF_DESTROYED;
1466
1467 if (coro->flags & CF_READY)
1468 {
1469 /* reduce nready, as destroying a ready coro effectively unreadies it */
1470 /* alternative: look through all ready queues and remove the coro */
1471 --coro_nready;
1472 }
1473 else
1474 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1475
1476 if (coro->mainstack
1477 && coro->mainstack != main_mainstack
1478 && !PL_dirty)
1479 {
1480 struct coro temp;
1481
1482 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1483
1484 save_perl (aTHX_ &temp);
1485 load_perl (aTHX_ coro);
1486
1487 coro_destruct_perl (aTHX_ coro);
1488
1489 load_perl (aTHX_ &temp);
1490
1491 coro->slot = 0;
1492 }
1493
1494 cctx_destroy (coro->cctx);
1495 SvREFCNT_dec (coro->startcv);
1496 SvREFCNT_dec (coro->args);
1497 SvREFCNT_dec (CORO_THROW);
1498
1499 if (coro->next) coro->next->prev = coro->prev;
1500 if (coro->prev) coro->prev->next = coro->next;
1501 if (coro == coro_first) coro_first = coro->next;
1502
1503 return 1;
1504}
1505
1506static int
1507coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1508{
1509 struct coro *coro = (struct coro *)mg->mg_ptr;
1510 mg->mg_ptr = 0;
1511
1512 coro->hv = 0;
1513
1514 if (--coro->refcnt < 0)
1515 {
1516 coro_state_destroy (aTHX_ coro);
1517 Safefree (coro);
1518 }
1519
1520 return 0;
1521}
1522
1523static int
1524coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1525{
1526 struct coro *coro = (struct coro *)mg->mg_ptr;
1527
1528 ++coro->refcnt;
1529
1530 return 0;
1531}
1532
1533static MGVTBL coro_state_vtbl = {
1534 0, 0, 0, 0,
1535 coro_state_free,
1536 0,
1537#ifdef MGf_DUP
1538 coro_state_dup,
1539#else
1540# define MGf_DUP 0
1541#endif
1542};
1543
1544static void
1545prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1546{
1547 ta->prev = SvSTATE (prev_sv);
1548 ta->next = SvSTATE (next_sv);
1549 TRANSFER_CHECK (*ta);
1550}
1551
1552static void
1553api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1554{
1555 struct coro_transfer_args ta;
1556
1557 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1558 TRANSFER (ta, 1);
1559}
1560
1561/*****************************************************************************/
1562/* gensub: simple closure generation utility */
1563
1564#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1565
1566/* create a closure from XS, returns a code reference */
1567/* the arg can be accessed via GENSUB_ARG from the callback */
1568/* the callback must use dXSARGS/XSRETURN */
1569static SV *
1570gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1571{
1572 CV *cv = (CV *)newSV (0);
1573
1574 sv_upgrade ((SV *)cv, SVt_PVCV);
1575
1576 CvANON_on (cv);
1577 CvISXSUB_on (cv);
1578 CvXSUB (cv) = xsub;
1579 GENSUB_ARG = arg;
1580
1581 return newRV_noinc ((SV *)cv);
1582}
1583
1584/** Coro ********************************************************************/
1585
1586INLINE void
1587coro_enq (pTHX_ struct coro *coro)
1588{
1589 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1590}
1591
1592INLINE SV *
1593coro_deq (pTHX)
1594{
1595 int prio;
1596
1597 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1598 if (AvFILLp (coro_ready [prio]) >= 0)
1599 return av_shift (coro_ready [prio]);
1600
1601 return 0;
1602}
1603
1604static int
1605api_ready (pTHX_ SV *coro_sv)
1606{
1607 struct coro *coro;
1608 SV *sv_hook;
1609 void (*xs_hook)(void);
1610
1611 coro = SvSTATE (coro_sv);
1612
1613 if (coro->flags & CF_READY)
1614 return 0;
1615
1616 coro->flags |= CF_READY;
1617
1618 sv_hook = coro_nready ? 0 : coro_readyhook;
1619 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1620
1621 coro_enq (aTHX_ coro);
1622 ++coro_nready;
1623
1624 if (sv_hook)
1625 {
1626 dSP;
1627
1628 ENTER;
1629 SAVETMPS;
1630
614 PUSHMARK(SP); 1631 PUSHMARK (SP);
615 PUTBACK; 1632 PUTBACK;
616 (void) call_sv (sub_init, G_VOID|G_NOARGS); 1633 call_sv (sv_hook, G_VOID | G_DISCARD);
617 croak ("FATAL: CCTXT coroutine returned!"); 1634
618 } 1635 FREETMPS;
619 else 1636 LEAVE;
620 { 1637 }
621 UNOP myop;
622 1638
623 PL_op = (OP *)&myop; 1639 if (xs_hook)
1640 xs_hook ();
624 1641
625 Zero(&myop, 1, UNOP); 1642 return 1;
626 myop.op_next = Nullop; 1643}
627 myop.op_flags = OPf_WANT_VOID;
628 1644
629 PUSHMARK(SP); 1645static int
630 XPUSHs (sub_init); 1646api_is_ready (pTHX_ SV *coro_sv)
631 /* 1647{
632 * the next line is slightly wrong, as PL_op->op_next 1648 return !!(SvSTATE (coro_sv)->flags & CF_READY);
633 * is actually being executed so we skip the first op. 1649}
634 * that doesn't matter, though, since it is only
635 * pp_nextstate and we never return...
636 * ah yes, and I don't care anyways ;)
637 */
638 PUTBACK;
639 PL_op = pp_entersub();
640 SPAGAIN;
641 1650
642 ENTER; /* necessary e.g. for dounwind */ 1651/* expects to own a reference to next->hv */
1652INLINE void
1653prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1654{
1655 SV *prev_sv = SvRV (coro_current);
1656
1657 ta->prev = SvSTATE_hv (prev_sv);
1658 ta->next = next;
1659
1660 TRANSFER_CHECK (*ta);
1661
1662 SvRV_set (coro_current, (SV *)next->hv);
1663
1664 free_coro_mortal (aTHX);
1665 coro_mortal = prev_sv;
1666}
1667
1668static void
1669prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1670{
1671 for (;;)
643 } 1672 {
644} 1673 SV *next_sv = coro_deq (aTHX);
645 1674
646static void 1675 if (expect_true (next_sv))
647continue_coro (void *arg)
648{
649 /*
650 * this is a _very_ stripped down perl interpreter ;)
651 */
652 Coro__State ctx = (Coro__State)arg;
653
654 ctx->cursp = 0;
655 PL_op = PL_op->op_next;
656 CALLRUNOPS(aTHX);
657 /*NORETURN*/
658 abort ();
659}
660
661STATIC void
662transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
663{
664 dSP;
665 dSTACKLEVEL;
666
667 if (prev != next)
668 {
669 if (next->mainstack)
670 { 1676 {
671 SAVE (prev, flags); 1677 struct coro *next = SvSTATE_hv (next_sv);
672 LOAD (next);
673 1678
674 /* mark this state as in-use */ 1679 /* cannot transfer to destroyed coros, skip and look for next */
675 next->mainstack = 0; 1680 if (expect_false (next->flags & CF_DESTROYED))
676 next->tmps_ix = -2; 1681 SvREFCNT_dec (next_sv); /* coro_nready has already been taken care of by destroy */
677 1682 else
678 /* stacklevel changed? if yes, grab the stack for us! */
679 if (flags & TRANSFER_SAVE_CCTXT)
680 { 1683 {
681 if (!prev->stack) 1684 next->flags &= ~CF_READY;
682 allocate_stack (prev, 0); 1685 --coro_nready;
683 else if (prev->cursp != stacklevel 1686
684 && prev->stack->usecnt > 1) 1687 prepare_schedule_to (aTHX_ ta, next);
685 { 1688 break;
686 prev->gencnt = ++prev->stack->gencnt;
687 prev->stack->usecnt = 1;
688 }
689
690 /* has our stack been invalidated? */
691 if (next->stack && next->stack->gencnt != next->gencnt)
692 {
693 deallocate_stack (next);
694 allocate_stack (next, 1);
695 coro_create (&(next->stack->cctx),
696 continue_coro, (void *)next,
697 next->stack->sptr, labs (next->stack->ssize));
698 }
699
700 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
701 } 1689 }
702
703 } 1690 }
704 else if (next->tmps_ix == -2)
705 croak ("tried to transfer to running coroutine");
706 else 1691 else
707 { 1692 {
708 SAVE (prev, -1); /* first get rid of the old state */ 1693 /* nothing to schedule: call the idle handler */
709 1694 if (SvROK (sv_idle)
710 if (flags & TRANSFER_SAVE_CCTXT) 1695 && SvOBJECT (SvRV (sv_idle)))
711 { 1696 {
712 if (!prev->stack) 1697 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
713 allocate_stack (prev, 0); 1698 api_ready (aTHX_ SvRV (sv_idle));
714 1699 --coro_nready;
715 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
716 {
717 setup_coro (next);
718
719 prev->stack->refcnt++;
720 prev->stack->usecnt++;
721 next->stack = prev->stack;
722 next->gencnt = prev->gencnt;
723 }
724 else
725 {
726 allocate_stack (next, 1);
727 coro_create (&(next->stack->cctx),
728 setup_coro, (void *)next,
729 next->stack->sptr, labs (next->stack->ssize));
730 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
731 }
732 } 1700 }
733 else 1701 else
734 setup_coro (next); 1702 {
1703 dSP;
1704
1705 ENTER;
1706 SAVETMPS;
1707
1708 PUSHMARK (SP);
1709 PUTBACK;
1710 call_sv (sv_idle, G_VOID | G_DISCARD);
1711
1712 FREETMPS;
1713 LEAVE;
1714 }
735 } 1715 }
736 } 1716 }
737
738 next->cursp = stacklevel;
739} 1717}
740 1718
1719INLINE void
1720prepare_cede (pTHX_ struct coro_transfer_args *ta)
1721{
1722 api_ready (aTHX_ coro_current);
1723 prepare_schedule (aTHX_ ta);
1724}
1725
1726INLINE void
1727prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1728{
1729 SV *prev = SvRV (coro_current);
1730
1731 if (coro_nready)
1732 {
1733 prepare_schedule (aTHX_ ta);
1734 api_ready (aTHX_ prev);
1735 }
1736 else
1737 prepare_nop (aTHX_ ta);
1738}
1739
1740static void
1741api_schedule (pTHX)
1742{
1743 struct coro_transfer_args ta;
1744
1745 prepare_schedule (aTHX_ &ta);
1746 TRANSFER (ta, 1);
1747}
1748
1749static void
1750api_schedule_to (pTHX_ SV *coro_sv)
1751{
1752 struct coro_transfer_args ta;
1753 struct coro *next = SvSTATE (coro_sv);
1754
1755 SvREFCNT_inc_NN (coro_sv);
1756 prepare_schedule_to (aTHX_ &ta, next);
1757}
1758
1759static int
1760api_cede (pTHX)
1761{
1762 struct coro_transfer_args ta;
1763
1764 prepare_cede (aTHX_ &ta);
1765
1766 if (expect_true (ta.prev != ta.next))
1767 {
1768 TRANSFER (ta, 1);
1769 return 1;
1770 }
1771 else
1772 return 0;
1773}
1774
1775static int
1776api_cede_notself (pTHX)
1777{
1778 if (coro_nready)
1779 {
1780 struct coro_transfer_args ta;
1781
1782 prepare_cede_notself (aTHX_ &ta);
1783 TRANSFER (ta, 1);
1784 return 1;
1785 }
1786 else
1787 return 0;
1788}
1789
1790static void
1791api_trace (pTHX_ SV *coro_sv, int flags)
1792{
1793 struct coro *coro = SvSTATE (coro_sv);
1794
1795 if (coro->flags & CF_RUNNING)
1796 croak ("cannot enable tracing on a running coroutine, caught");
1797
1798 if (flags & CC_TRACE)
1799 {
1800 if (!coro->cctx)
1801 coro->cctx = cctx_new_run ();
1802 else if (!(coro->cctx->flags & CC_TRACE))
1803 croak ("cannot enable tracing on coroutine with custom stack, caught");
1804
1805 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1806 }
1807 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1808 {
1809 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1810
1811 if (coro->flags & CF_RUNNING)
1812 PL_runops = RUNOPS_DEFAULT;
1813 else
1814 coro->slot->runops = RUNOPS_DEFAULT;
1815 }
1816}
1817
1818static void
1819coro_call_on_destroy (pTHX_ struct coro *coro)
1820{
1821 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1822 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1823
1824 if (on_destroyp)
1825 {
1826 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1827
1828 while (AvFILLp (on_destroy) >= 0)
1829 {
1830 dSP; /* don't disturb outer sp */
1831 SV *cb = av_pop (on_destroy);
1832
1833 PUSHMARK (SP);
1834
1835 if (statusp)
1836 {
1837 int i;
1838 AV *status = (AV *)SvRV (*statusp);
1839 EXTEND (SP, AvFILLp (status) + 1);
1840
1841 for (i = 0; i <= AvFILLp (status); ++i)
1842 PUSHs (AvARRAY (status)[i]);
1843 }
1844
1845 PUTBACK;
1846 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1847 }
1848 }
1849}
1850
1851static void
1852slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1853{
1854 int i;
1855 HV *hv = (HV *)SvRV (coro_current);
1856 AV *av = newAV ();
1857
1858 av_extend (av, items - 1);
1859 for (i = 0; i < items; ++i)
1860 av_push (av, SvREFCNT_inc_NN (arg [i]));
1861
1862 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1863
1864 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1865 api_ready (aTHX_ sv_manager);
1866
1867 frame->prepare = prepare_schedule;
1868 frame->check = slf_check_repeat;
1869}
1870
1871/*****************************************************************************/
1872/* async pool handler */
1873
1874static int
1875slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1876{
1877 HV *hv = (HV *)SvRV (coro_current);
1878 struct coro *coro = (struct coro *)frame->data;
1879
1880 if (!coro->invoke_cb)
1881 return 1; /* loop till we have invoke */
1882 else
1883 {
1884 hv_store (hv, "desc", sizeof ("desc") - 1,
1885 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1886
1887 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1888
1889 {
1890 dSP;
1891 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1892 PUTBACK;
1893 }
1894
1895 SvREFCNT_dec (GvAV (PL_defgv));
1896 GvAV (PL_defgv) = coro->invoke_av;
1897 coro->invoke_av = 0;
1898
1899 return 0;
1900 }
1901}
1902
1903static void
1904slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1905{
1906 HV *hv = (HV *)SvRV (coro_current);
1907 struct coro *coro = SvSTATE_hv ((SV *)hv);
1908
1909 if (expect_true (coro->saved_deffh))
1910 {
1911 /* subsequent iteration */
1912 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1913 coro->saved_deffh = 0;
1914
1915 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1916 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1917 {
1918 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1919 coro->invoke_av = newAV ();
1920
1921 frame->prepare = prepare_nop;
1922 }
1923 else
1924 {
1925 av_clear (GvAV (PL_defgv));
1926 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1927
1928 coro->prio = 0;
1929
1930 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1931 api_trace (aTHX_ coro_current, 0);
1932
1933 frame->prepare = prepare_schedule;
1934 av_push (av_async_pool, SvREFCNT_inc (hv));
1935 }
1936 }
1937 else
1938 {
1939 /* first iteration, simply fall through */
1940 frame->prepare = prepare_nop;
1941 }
1942
1943 frame->check = slf_check_pool_handler;
1944 frame->data = (void *)coro;
1945}
1946
1947/*****************************************************************************/
1948/* rouse callback */
1949
1950#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1951
1952static void
1953coro_rouse_callback (pTHX_ CV *cv)
1954{
1955 dXSARGS;
1956 SV *data = (SV *)GENSUB_ARG;
1957
1958 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1959 {
1960 /* first call, set args */
1961 AV *av = newAV ();
1962 SV *coro = SvRV (data);
1963
1964 SvRV_set (data, (SV *)av);
1965 api_ready (aTHX_ coro);
1966 SvREFCNT_dec (coro);
1967
1968 /* better take a full copy of the arguments */
1969 while (items--)
1970 av_store (av, items, newSVsv (ST (items)));
1971 }
1972
1973 XSRETURN_EMPTY;
1974}
1975
1976static int
1977slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1978{
1979 SV *data = (SV *)frame->data;
1980
1981 if (CORO_THROW)
1982 return 0;
1983
1984 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1985 return 1;
1986
1987 /* now push all results on the stack */
1988 {
1989 dSP;
1990 AV *av = (AV *)SvRV (data);
1991 int i;
1992
1993 EXTEND (SP, AvFILLp (av) + 1);
1994 for (i = 0; i <= AvFILLp (av); ++i)
1995 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1996
1997 /* we have stolen the elements, so ste length to zero and free */
1998 AvFILLp (av) = -1;
1999 av_undef (av);
2000
2001 PUTBACK;
2002 }
2003
2004 return 0;
2005}
2006
2007static void
2008slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2009{
2010 SV *cb;
2011
2012 if (items)
2013 cb = arg [0];
2014 else
2015 {
2016 struct coro *coro = SvSTATE_current;
2017
2018 if (!coro->rouse_cb)
2019 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2020
2021 cb = sv_2mortal (coro->rouse_cb);
2022 coro->rouse_cb = 0;
2023 }
2024
2025 if (!SvROK (cb)
2026 || SvTYPE (SvRV (cb)) != SVt_PVCV
2027 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2028 croak ("Coro::rouse_wait called with illegal callback argument,");
2029
2030 {
2031 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2032 SV *data = (SV *)GENSUB_ARG;
2033
2034 frame->data = (void *)data;
2035 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2036 frame->check = slf_check_rouse_wait;
2037 }
2038}
2039
2040static SV *
2041coro_new_rouse_cb (pTHX)
2042{
2043 HV *hv = (HV *)SvRV (coro_current);
2044 struct coro *coro = SvSTATE_hv (hv);
2045 SV *data = newRV_inc ((SV *)hv);
2046 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2047
2048 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2049 SvREFCNT_dec (data); /* magicext increases the refcount */
2050
2051 SvREFCNT_dec (coro->rouse_cb);
2052 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2053
2054 return cb;
2055}
2056
2057/*****************************************************************************/
2058/* schedule-like-function opcode (SLF) */
2059
2060static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2061static const CV *slf_cv;
2062static SV **slf_argv;
2063static int slf_argc, slf_arga; /* count, allocated */
2064static I32 slf_ax; /* top of stack, for restore */
2065
2066/* this restores the stack in the case we patched the entersub, to */
2067/* recreate the stack frame as perl will on following calls */
2068/* since entersub cleared the stack */
2069static OP *
2070pp_restore (pTHX)
2071{
2072 int i;
2073 SV **SP = PL_stack_base + slf_ax;
2074
2075 PUSHMARK (SP);
2076
2077 EXTEND (SP, slf_argc + 1);
2078
2079 for (i = 0; i < slf_argc; ++i)
2080 PUSHs (sv_2mortal (slf_argv [i]));
2081
2082 PUSHs ((SV *)CvGV (slf_cv));
2083
2084 RETURNOP (slf_restore.op_first);
2085}
2086
2087static void
2088slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2089{
2090 SV **arg = (SV **)slf_frame.data;
2091
2092 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2093}
2094
2095static void
2096slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2097{
2098 if (items != 2)
2099 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2100
2101 frame->prepare = slf_prepare_transfer;
2102 frame->check = slf_check_nop;
2103 frame->data = (void *)arg; /* let's hope it will stay valid */
2104}
2105
2106static void
2107slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2108{
2109 frame->prepare = prepare_schedule;
2110 frame->check = slf_check_nop;
2111}
2112
2113static void
2114slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2115{
2116 struct coro *next = (struct coro *)slf_frame.data;
2117
2118 SvREFCNT_inc_NN (next->hv);
2119 prepare_schedule_to (aTHX_ ta, next);
2120}
2121
2122static void
2123slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2124{
2125 if (!items)
2126 croak ("Coro::schedule_to expects a coroutine argument, caught");
2127
2128 frame->data = (void *)SvSTATE (arg [0]);
2129 frame->prepare = slf_prepare_schedule_to;
2130 frame->check = slf_check_nop;
2131}
2132
2133static void
2134slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2135{
2136 api_ready (aTHX_ SvRV (coro_current));
2137
2138 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2139}
2140
2141static void
2142slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2143{
2144 frame->prepare = prepare_cede;
2145 frame->check = slf_check_nop;
2146}
2147
2148static void
2149slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2150{
2151 frame->prepare = prepare_cede_notself;
2152 frame->check = slf_check_nop;
2153}
2154
2155/*
2156 * these not obviously related functions are all rolled into one
2157 * function to increase chances that they all will call transfer with the same
2158 * stack offset
2159 * SLF stands for "schedule-like-function".
2160 */
2161static OP *
2162pp_slf (pTHX)
2163{
2164 I32 checkmark; /* mark SP to see how many elements check has pushed */
2165
2166 /* set up the slf frame, unless it has already been set-up */
2167 /* the latter happens when a new coro has been started */
2168 /* or when a new cctx was attached to an existing coroutine */
2169 if (expect_true (!slf_frame.prepare))
2170 {
2171 /* first iteration */
2172 dSP;
2173 SV **arg = PL_stack_base + TOPMARK + 1;
2174 int items = SP - arg; /* args without function object */
2175 SV *gv = *sp;
2176
2177 /* do a quick consistency check on the "function" object, and if it isn't */
2178 /* for us, divert to the real entersub */
2179 if (SvTYPE (gv) != SVt_PVGV
2180 || !GvCV (gv)
2181 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2182 return PL_ppaddr[OP_ENTERSUB](aTHX);
2183
2184 if (!(PL_op->op_flags & OPf_STACKED))
2185 {
2186 /* ampersand-form of call, use @_ instead of stack */
2187 AV *av = GvAV (PL_defgv);
2188 arg = AvARRAY (av);
2189 items = AvFILLp (av) + 1;
2190 }
2191
2192 /* now call the init function, which needs to set up slf_frame */
2193 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2194 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2195
2196 /* pop args */
2197 SP = PL_stack_base + POPMARK;
2198
2199 PUTBACK;
2200 }
2201
2202 /* now that we have a slf_frame, interpret it! */
2203 /* we use a callback system not to make the code needlessly */
2204 /* complicated, but so we can run multiple perl coros from one cctx */
2205
2206 do
2207 {
2208 struct coro_transfer_args ta;
2209
2210 slf_frame.prepare (aTHX_ &ta);
2211 TRANSFER (ta, 0);
2212
2213 checkmark = PL_stack_sp - PL_stack_base;
2214 }
2215 while (slf_frame.check (aTHX_ &slf_frame));
2216
2217 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2218
2219 /* exception handling */
2220 if (expect_false (CORO_THROW))
2221 {
2222 SV *exception = sv_2mortal (CORO_THROW);
2223
2224 CORO_THROW = 0;
2225 sv_setsv (ERRSV, exception);
2226 croak (0);
2227 }
2228
2229 /* return value handling - mostly like entersub */
2230 /* make sure we put something on the stack in scalar context */
2231 if (GIMME_V == G_SCALAR)
2232 {
2233 dSP;
2234 SV **bot = PL_stack_base + checkmark;
2235
2236 if (sp == bot) /* too few, push undef */
2237 bot [1] = &PL_sv_undef;
2238 else if (sp != bot + 1) /* too many, take last one */
2239 bot [1] = *sp;
2240
2241 SP = bot + 1;
2242
2243 PUTBACK;
2244 }
2245
2246 return NORMAL;
2247}
2248
2249static void
2250api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2251{
2252 int i;
2253 SV **arg = PL_stack_base + ax;
2254 int items = PL_stack_sp - arg + 1;
2255
2256 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2257
2258 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2259 && PL_op->op_ppaddr != pp_slf)
2260 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2261
2262 CvFLAGS (cv) |= CVf_SLF;
2263 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2264 slf_cv = cv;
2265
2266 /* we patch the op, and then re-run the whole call */
2267 /* we have to put the same argument on the stack for this to work */
2268 /* and this will be done by pp_restore */
2269 slf_restore.op_next = (OP *)&slf_restore;
2270 slf_restore.op_type = OP_CUSTOM;
2271 slf_restore.op_ppaddr = pp_restore;
2272 slf_restore.op_first = PL_op;
2273
2274 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2275
2276 if (PL_op->op_flags & OPf_STACKED)
2277 {
2278 if (items > slf_arga)
2279 {
2280 slf_arga = items;
2281 free (slf_argv);
2282 slf_argv = malloc (slf_arga * sizeof (SV *));
2283 }
2284
2285 slf_argc = items;
2286
2287 for (i = 0; i < items; ++i)
2288 slf_argv [i] = SvREFCNT_inc (arg [i]);
2289 }
2290 else
2291 slf_argc = 0;
2292
2293 PL_op->op_ppaddr = pp_slf;
2294 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2295
2296 PL_op = (OP *)&slf_restore;
2297}
2298
2299/*****************************************************************************/
2300/* PerlIO::cede */
2301
2302typedef struct
2303{
2304 PerlIOBuf base;
2305 NV next, every;
2306} PerlIOCede;
2307
2308static IV
2309PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2310{
2311 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2312
2313 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2314 self->next = nvtime () + self->every;
2315
2316 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2317}
2318
2319static SV *
2320PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2321{
2322 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2323
2324 return newSVnv (self->every);
2325}
2326
2327static IV
2328PerlIOCede_flush (pTHX_ PerlIO *f)
2329{
2330 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2331 double now = nvtime ();
2332
2333 if (now >= self->next)
2334 {
2335 api_cede (aTHX);
2336 self->next = now + self->every;
2337 }
2338
2339 return PerlIOBuf_flush (aTHX_ f);
2340}
2341
2342static PerlIO_funcs PerlIO_cede =
2343{
2344 sizeof(PerlIO_funcs),
2345 "cede",
2346 sizeof(PerlIOCede),
2347 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2348 PerlIOCede_pushed,
2349 PerlIOBuf_popped,
2350 PerlIOBuf_open,
2351 PerlIOBase_binmode,
2352 PerlIOCede_getarg,
2353 PerlIOBase_fileno,
2354 PerlIOBuf_dup,
2355 PerlIOBuf_read,
2356 PerlIOBuf_unread,
2357 PerlIOBuf_write,
2358 PerlIOBuf_seek,
2359 PerlIOBuf_tell,
2360 PerlIOBuf_close,
2361 PerlIOCede_flush,
2362 PerlIOBuf_fill,
2363 PerlIOBase_eof,
2364 PerlIOBase_error,
2365 PerlIOBase_clearerr,
2366 PerlIOBase_setlinebuf,
2367 PerlIOBuf_get_base,
2368 PerlIOBuf_bufsiz,
2369 PerlIOBuf_get_ptr,
2370 PerlIOBuf_get_cnt,
2371 PerlIOBuf_set_ptrcnt,
2372};
2373
2374/*****************************************************************************/
2375/* Coro::Semaphore & Coro::Signal */
2376
2377static SV *
2378coro_waitarray_new (pTHX_ int count)
2379{
2380 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2381 AV *av = newAV ();
2382 SV **ary;
2383
2384 /* unfortunately, building manually saves memory */
2385 Newx (ary, 2, SV *);
2386 AvALLOC (av) = ary;
2387#if PERL_VERSION_ATLEAST (5,10,0)
2388 AvARRAY (av) = ary;
2389#else
2390 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2391 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2392 SvPVX ((SV *)av) = (char *)ary;
2393#endif
2394 AvMAX (av) = 1;
2395 AvFILLp (av) = 0;
2396 ary [0] = newSViv (count);
2397
2398 return newRV_noinc ((SV *)av);
2399}
2400
2401/* semaphore */
2402
2403static void
2404coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2405{
2406 SV *count_sv = AvARRAY (av)[0];
2407 IV count = SvIVX (count_sv);
2408
2409 count += adjust;
2410 SvIVX (count_sv) = count;
2411
2412 /* now wake up as many waiters as are expected to lock */
2413 while (count > 0 && AvFILLp (av) > 0)
2414 {
2415 SV *cb;
2416
2417 /* swap first two elements so we can shift a waiter */
2418 AvARRAY (av)[0] = AvARRAY (av)[1];
2419 AvARRAY (av)[1] = count_sv;
2420 cb = av_shift (av);
2421
2422 if (SvOBJECT (cb))
2423 {
2424 api_ready (aTHX_ cb);
2425 --count;
2426 }
2427 else if (SvTYPE (cb) == SVt_PVCV)
2428 {
2429 dSP;
2430 PUSHMARK (SP);
2431 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2432 PUTBACK;
2433 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2434 }
2435
2436 SvREFCNT_dec (cb);
2437 }
2438}
2439
2440static void
2441coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2442{
2443 /* call $sem->adjust (0) to possibly wake up some other waiters */
2444 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2445}
2446
2447static int
2448slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2449{
2450 AV *av = (AV *)frame->data;
2451 SV *count_sv = AvARRAY (av)[0];
2452
2453 /* if we are about to throw, don't actually acquire the lock, just throw */
2454 if (CORO_THROW)
2455 return 0;
2456 else if (SvIVX (count_sv) > 0)
2457 {
2458 SvSTATE_current->on_destroy = 0;
2459
2460 if (acquire)
2461 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2462 else
2463 coro_semaphore_adjust (aTHX_ av, 0);
2464
2465 return 0;
2466 }
2467 else
2468 {
2469 int i;
2470 /* if we were woken up but can't down, we look through the whole */
2471 /* waiters list and only add us if we aren't in there already */
2472 /* this avoids some degenerate memory usage cases */
2473
2474 for (i = 1; i <= AvFILLp (av); ++i)
2475 if (AvARRAY (av)[i] == SvRV (coro_current))
2476 return 1;
2477
2478 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2479 return 1;
2480 }
2481}
2482
2483static int
2484slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2485{
2486 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2487}
2488
2489static int
2490slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2491{
2492 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2493}
2494
2495static void
2496slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2497{
2498 AV *av = (AV *)SvRV (arg [0]);
2499
2500 if (SvIVX (AvARRAY (av)[0]) > 0)
2501 {
2502 frame->data = (void *)av;
2503 frame->prepare = prepare_nop;
2504 }
2505 else
2506 {
2507 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2508
2509 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2510 frame->prepare = prepare_schedule;
2511
2512 /* to avoid race conditions when a woken-up coro gets terminated */
2513 /* we arrange for a temporary on_destroy that calls adjust (0) */
2514 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2515 }
2516}
2517
2518static void
2519slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2520{
2521 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2522 frame->check = slf_check_semaphore_down;
2523}
2524
2525static void
2526slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2527{
2528 if (items >= 2)
2529 {
2530 /* callback form */
2531 AV *av = (AV *)SvRV (arg [0]);
2532 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2533
2534 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2535
2536 if (SvIVX (AvARRAY (av)[0]) > 0)
2537 coro_semaphore_adjust (aTHX_ av, 0);
2538
2539 frame->prepare = prepare_nop;
2540 frame->check = slf_check_nop;
2541 }
2542 else
2543 {
2544 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2545 frame->check = slf_check_semaphore_wait;
2546 }
2547}
2548
2549/* signal */
2550
2551static void
2552coro_signal_wake (pTHX_ AV *av, int count)
2553{
2554 SvIVX (AvARRAY (av)[0]) = 0;
2555
2556 /* now signal count waiters */
2557 while (count > 0 && AvFILLp (av) > 0)
2558 {
2559 SV *cb;
2560
2561 /* swap first two elements so we can shift a waiter */
2562 cb = AvARRAY (av)[0];
2563 AvARRAY (av)[0] = AvARRAY (av)[1];
2564 AvARRAY (av)[1] = cb;
2565
2566 cb = av_shift (av);
2567
2568 api_ready (aTHX_ cb);
2569 sv_setiv (cb, 0); /* signal waiter */
2570 SvREFCNT_dec (cb);
2571
2572 --count;
2573 }
2574}
2575
2576static int
2577slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2578{
2579 /* if we are about to throw, also stop waiting */
2580 return SvROK ((SV *)frame->data) && !CORO_THROW;
2581}
2582
2583static void
2584slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2585{
2586 AV *av = (AV *)SvRV (arg [0]);
2587
2588 if (SvIVX (AvARRAY (av)[0]))
2589 {
2590 SvIVX (AvARRAY (av)[0]) = 0;
2591 frame->prepare = prepare_nop;
2592 frame->check = slf_check_nop;
2593 }
2594 else
2595 {
2596 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2597
2598 av_push (av, waiter);
2599
2600 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2601 frame->prepare = prepare_schedule;
2602 frame->check = slf_check_signal_wait;
2603 }
2604}
2605
2606/*****************************************************************************/
2607/* Coro::AIO */
2608
2609#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2610
2611/* helper storage struct */
2612struct io_state
2613{
2614 int errorno;
2615 I32 laststype; /* U16 in 5.10.0 */
2616 int laststatval;
2617 Stat_t statcache;
2618};
2619
2620static void
2621coro_aio_callback (pTHX_ CV *cv)
2622{
2623 dXSARGS;
2624 AV *state = (AV *)GENSUB_ARG;
2625 SV *coro = av_pop (state);
2626 SV *data_sv = newSV (sizeof (struct io_state));
2627
2628 av_extend (state, items - 1);
2629
2630 sv_upgrade (data_sv, SVt_PV);
2631 SvCUR_set (data_sv, sizeof (struct io_state));
2632 SvPOK_only (data_sv);
2633
2634 {
2635 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2636
2637 data->errorno = errno;
2638 data->laststype = PL_laststype;
2639 data->laststatval = PL_laststatval;
2640 data->statcache = PL_statcache;
2641 }
2642
2643 /* now build the result vector out of all the parameters and the data_sv */
2644 {
2645 int i;
2646
2647 for (i = 0; i < items; ++i)
2648 av_push (state, SvREFCNT_inc_NN (ST (i)));
2649 }
2650
2651 av_push (state, data_sv);
2652
2653 api_ready (aTHX_ coro);
2654 SvREFCNT_dec (coro);
2655 SvREFCNT_dec ((AV *)state);
2656}
2657
2658static int
2659slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2660{
2661 AV *state = (AV *)frame->data;
2662
2663 /* if we are about to throw, return early */
2664 /* this does not cancel the aio request, but at least */
2665 /* it quickly returns */
2666 if (CORO_THROW)
2667 return 0;
2668
2669 /* one element that is an RV? repeat! */
2670 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2671 return 1;
2672
2673 /* restore status */
2674 {
2675 SV *data_sv = av_pop (state);
2676 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2677
2678 errno = data->errorno;
2679 PL_laststype = data->laststype;
2680 PL_laststatval = data->laststatval;
2681 PL_statcache = data->statcache;
2682
2683 SvREFCNT_dec (data_sv);
2684 }
2685
2686 /* push result values */
2687 {
2688 dSP;
2689 int i;
2690
2691 EXTEND (SP, AvFILLp (state) + 1);
2692 for (i = 0; i <= AvFILLp (state); ++i)
2693 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2694
2695 PUTBACK;
2696 }
2697
2698 return 0;
2699}
2700
2701static void
2702slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2703{
2704 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2705 SV *coro_hv = SvRV (coro_current);
2706 struct coro *coro = SvSTATE_hv (coro_hv);
2707
2708 /* put our coroutine id on the state arg */
2709 av_push (state, SvREFCNT_inc_NN (coro_hv));
2710
2711 /* first see whether we have a non-zero priority and set it as AIO prio */
2712 if (coro->prio)
2713 {
2714 dSP;
2715
2716 static SV *prio_cv;
2717 static SV *prio_sv;
2718
2719 if (expect_false (!prio_cv))
2720 {
2721 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2722 prio_sv = newSViv (0);
2723 }
2724
2725 PUSHMARK (SP);
2726 sv_setiv (prio_sv, coro->prio);
2727 XPUSHs (prio_sv);
2728
2729 PUTBACK;
2730 call_sv (prio_cv, G_VOID | G_DISCARD);
2731 }
2732
2733 /* now call the original request */
2734 {
2735 dSP;
2736 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2737 int i;
2738
2739 PUSHMARK (SP);
2740
2741 /* first push all args to the stack */
2742 EXTEND (SP, items + 1);
2743
2744 for (i = 0; i < items; ++i)
2745 PUSHs (arg [i]);
2746
2747 /* now push the callback closure */
2748 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2749
2750 /* now call the AIO function - we assume our request is uncancelable */
2751 PUTBACK;
2752 call_sv ((SV *)req, G_VOID | G_DISCARD);
2753 }
2754
2755 /* now that the requets is going, we loop toll we have a result */
2756 frame->data = (void *)state;
2757 frame->prepare = prepare_schedule;
2758 frame->check = slf_check_aio_req;
2759}
2760
2761static void
2762coro_aio_req_xs (pTHX_ CV *cv)
2763{
2764 dXSARGS;
2765
2766 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2767
2768 XSRETURN_EMPTY;
2769}
2770
2771/*****************************************************************************/
2772
2773#if CORO_CLONE
2774# include "clone.c"
2775#endif
2776
741MODULE = Coro::State PACKAGE = Coro::State 2777MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
742 2778
743PROTOTYPES: ENABLE 2779PROTOTYPES: DISABLE
744 2780
745BOOT: 2781BOOT:
746{ /* {} necessary for stoopid perl-5.6.x */ 2782{
747 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2783#ifdef USE_ITHREADS
748 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2784# if CORO_PTHREAD
2785 coro_thx = PERL_GET_CONTEXT;
2786# endif
2787#endif
2788 BOOT_PAGESIZE;
2789
2790 cctx_current = cctx_new_empty ();
2791
2792 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2793 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2794
2795 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2796 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2797 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2798
2799 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2800 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2801 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2802
749 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2803 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
750 2804
751 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2805 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
752 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2806 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
753 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2807 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
754 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2808 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
755
756 if (!padlist_cache)
757 padlist_cache = newHV ();
758 2809
759 main_mainstack = PL_mainstack; 2810 main_mainstack = PL_mainstack;
760} 2811 main_top_env = PL_top_env;
761 2812
762Coro::State 2813 while (main_top_env->je_prev)
763_newprocess(args) 2814 main_top_env = main_top_env->je_prev;
764 SV * args 2815
765 PROTOTYPE: $ 2816 {
2817 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2818
2819 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2820 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2821
2822 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2823 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2824 }
2825
2826 coroapi.ver = CORO_API_VERSION;
2827 coroapi.rev = CORO_API_REVISION;
2828
2829 coroapi.transfer = api_transfer;
2830
2831 coroapi.sv_state = SvSTATE_;
2832 coroapi.execute_slf = api_execute_slf;
2833 coroapi.prepare_nop = prepare_nop;
2834 coroapi.prepare_schedule = prepare_schedule;
2835 coroapi.prepare_cede = prepare_cede;
2836 coroapi.prepare_cede_notself = prepare_cede_notself;
2837
2838 {
2839 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2840
2841 if (!svp) croak ("Time::HiRes is required");
2842 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2843
2844 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2845 }
2846
2847 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2848}
2849
2850SV *
2851new (char *klass, ...)
2852 ALIAS:
2853 Coro::new = 1
766 CODE: 2854 CODE:
767 Coro__State coro; 2855{
2856 struct coro *coro;
2857 MAGIC *mg;
2858 HV *hv;
2859 CV *cb;
2860 int i;
768 2861
769 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 2862 if (items > 1)
770 croak ("Coro::State::_newprocess expects an arrayref");
771 2863 {
2864 cb = coro_sv_2cv (aTHX_ ST (1));
2865
2866 if (!ix)
2867 {
2868 if (CvISXSUB (cb))
2869 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2870
2871 if (!CvROOT (cb))
2872 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2873 }
2874 }
2875
772 New (0, coro, 1, struct coro); 2876 Newz (0, coro, 1, struct coro);
2877 coro->args = newAV ();
2878 coro->flags = CF_NEW;
773 2879
774 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2880 if (coro_first) coro_first->prev = coro;
775 coro->mainstack = 0; /* actual work is done inside transfer */ 2881 coro->next = coro_first;
776 coro->stack = 0; 2882 coro_first = coro;
777 2883
778 RETVAL = coro; 2884 coro->hv = hv = newHV ();
2885 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2886 mg->mg_flags |= MGf_DUP;
2887 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2888
2889 if (items > 1)
2890 {
2891 av_extend (coro->args, items - 1 + ix - 1);
2892
2893 if (ix)
2894 {
2895 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2896 cb = cv_coro_run;
2897 }
2898
2899 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2900
2901 for (i = 2; i < items; i++)
2902 av_push (coro->args, newSVsv (ST (i)));
2903 }
2904}
779 OUTPUT: 2905 OUTPUT:
780 RETVAL 2906 RETVAL
781 2907
782void 2908void
783transfer(prev, next, flags = TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK) 2909transfer (...)
784 Coro::State_or_hashref prev
785 Coro::State_or_hashref next
786 int flags
787 PROTOTYPE: @ 2910 PROTOTYPE: $$
788 CODE: 2911 CODE:
789 transfer (aTHX_ prev, next, flags); 2912 CORO_EXECUTE_SLF_XS (slf_init_transfer);
2913
2914bool
2915_destroy (SV *coro_sv)
2916 CODE:
2917 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2918 OUTPUT:
2919 RETVAL
790 2920
791void 2921void
792DESTROY(coro) 2922_exit (int code)
793 Coro::State coro 2923 PROTOTYPE: $
794 CODE: 2924 CODE:
2925 _exit (code);
795 2926
796 if (coro->mainstack && coro->mainstack != main_mainstack) 2927SV *
2928clone (Coro::State coro)
2929 CODE:
2930{
2931#if CORO_CLONE
2932 struct coro *ncoro = coro_clone (aTHX_ coro);
2933 MAGIC *mg;
2934 /* TODO: too much duplication */
2935 ncoro->hv = newHV ();
2936 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
2937 mg->mg_flags |= MGf_DUP;
2938 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
2939#else
2940 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
2941#endif
2942}
2943 OUTPUT:
2944 RETVAL
2945
2946int
2947cctx_stacksize (int new_stacksize = 0)
2948 PROTOTYPE: ;$
2949 CODE:
2950 RETVAL = cctx_stacksize;
2951 if (new_stacksize)
2952 {
2953 cctx_stacksize = new_stacksize;
2954 ++cctx_gen;
2955 }
2956 OUTPUT:
2957 RETVAL
2958
2959int
2960cctx_max_idle (int max_idle = 0)
2961 PROTOTYPE: ;$
2962 CODE:
2963 RETVAL = cctx_max_idle;
2964 if (max_idle > 1)
2965 cctx_max_idle = max_idle;
2966 OUTPUT:
2967 RETVAL
2968
2969int
2970cctx_count ()
2971 PROTOTYPE:
2972 CODE:
2973 RETVAL = cctx_count;
2974 OUTPUT:
2975 RETVAL
2976
2977int
2978cctx_idle ()
2979 PROTOTYPE:
2980 CODE:
2981 RETVAL = cctx_idle;
2982 OUTPUT:
2983 RETVAL
2984
2985void
2986list ()
2987 PROTOTYPE:
2988 PPCODE:
2989{
2990 struct coro *coro;
2991 for (coro = coro_first; coro; coro = coro->next)
2992 if (coro->hv)
2993 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2994}
2995
2996void
2997call (Coro::State coro, SV *coderef)
2998 ALIAS:
2999 eval = 1
3000 CODE:
3001{
3002 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
797 { 3003 {
798 struct coro temp; 3004 struct coro temp;
799 3005
800 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 3006 if (!(coro->flags & CF_RUNNING))
801 LOAD(aTHX_ coro); 3007 {
3008 PUTBACK;
3009 save_perl (aTHX_ &temp);
3010 load_perl (aTHX_ coro);
3011 }
802 3012
803 destroy_stacks (aTHX); 3013 {
3014 dSP;
3015 ENTER;
3016 SAVETMPS;
3017 PUTBACK;
3018 PUSHSTACK;
3019 PUSHMARK (SP);
804 3020
805 LOAD((&temp)); /* this will get rid of defsv etc.. */ 3021 if (ix)
3022 eval_sv (coderef, 0);
3023 else
3024 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
806 3025
807 coro->mainstack = 0; 3026 POPSTACK;
3027 SPAGAIN;
3028 FREETMPS;
3029 LEAVE;
3030 PUTBACK;
3031 }
3032
3033 if (!(coro->flags & CF_RUNNING))
3034 {
3035 save_perl (aTHX_ coro);
3036 load_perl (aTHX_ &temp);
3037 SPAGAIN;
3038 }
808 } 3039 }
3040}
809 3041
810 deallocate_stack (coro); 3042SV *
811 3043is_ready (Coro::State coro)
812 Safefree (coro); 3044 PROTOTYPE: $
3045 ALIAS:
3046 is_ready = CF_READY
3047 is_running = CF_RUNNING
3048 is_new = CF_NEW
3049 is_destroyed = CF_DESTROYED
3050 CODE:
3051 RETVAL = boolSV (coro->flags & ix);
3052 OUTPUT:
3053 RETVAL
813 3054
814void 3055void
815flush() 3056throw (Coro::State self, SV *throw = &PL_sv_undef)
3057 PROTOTYPE: $;$
3058 CODE:
3059{
3060 struct coro *current = SvSTATE_current;
3061 SV **throwp = self == current ? &CORO_THROW : &self->except;
3062 SvREFCNT_dec (*throwp);
3063 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3064}
3065
3066void
3067api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3068 PROTOTYPE: $;$
3069 C_ARGS: aTHX_ coro, flags
3070
3071SV *
3072has_cctx (Coro::State coro)
3073 PROTOTYPE: $
816 CODE: 3074 CODE:
817#ifdef MAY_FLUSH 3075 /* maybe manage the running flag differently */
818 flush_padlist_cache (); 3076 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
819#endif 3077 OUTPUT:
3078 RETVAL
820 3079
821MODULE = Coro::State PACKAGE = Coro::Cont 3080int
3081is_traced (Coro::State coro)
3082 PROTOTYPE: $
3083 CODE:
3084 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3085 OUTPUT:
3086 RETVAL
822 3087
823# this is slightly dirty 3088UV
3089rss (Coro::State coro)
3090 PROTOTYPE: $
3091 ALIAS:
3092 usecount = 1
3093 CODE:
3094 switch (ix)
3095 {
3096 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3097 case 1: RETVAL = coro->usecount; break;
3098 }
3099 OUTPUT:
3100 RETVAL
824 3101
825void 3102void
826yield(...) 3103force_cctx ()
3104 PROTOTYPE:
3105 CODE:
3106 cctx_current->idle_sp = 0;
3107
3108void
3109swap_defsv (Coro::State self)
827 PROTOTYPE: @ 3110 PROTOTYPE: $
3111 ALIAS:
3112 swap_defav = 1
828 CODE: 3113 CODE:
829 static SV *returnstk; 3114 if (!self->slot)
830 SV *sv; 3115 croak ("cannot swap state with coroutine that has no saved state,");
831 AV *defav = GvAV (PL_defgv); 3116 else
832 struct coro *prev, *next; 3117 {
3118 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3119 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
833 3120
834 if (!returnstk) 3121 SV *tmp = *src; *src = *dst; *dst = tmp;
835 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 3122 }
836 3123
837 /* set up @_ -- ugly */ 3124
838 av_clear (defav); 3125MODULE = Coro::State PACKAGE = Coro
3126
3127BOOT:
3128{
3129 int i;
3130
3131 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3132 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3133 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3134 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3135 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3136 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3137 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3138 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3139 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3140
3141 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3142 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3143 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3144 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3145
3146 coro_stash = gv_stashpv ("Coro", TRUE);
3147
3148 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
3149 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
3150 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
3151 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
3152 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
3153 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
3154
3155 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
3156 coro_ready[i] = newAV ();
3157
3158 {
3159 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
3160
3161 coroapi.schedule = api_schedule;
3162 coroapi.schedule_to = api_schedule_to;
3163 coroapi.cede = api_cede;
3164 coroapi.cede_notself = api_cede_notself;
3165 coroapi.ready = api_ready;
3166 coroapi.is_ready = api_is_ready;
3167 coroapi.nready = coro_nready;
3168 coroapi.current = coro_current;
3169
3170 /*GCoroAPI = &coroapi;*/
3171 sv_setiv (sv, (IV)&coroapi);
3172 SvREADONLY_on (sv);
3173 }
3174}
3175
3176void
3177terminate (...)
3178 CODE:
3179 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3180
3181void
3182schedule (...)
3183 CODE:
3184 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3185
3186void
3187schedule_to (...)
3188 CODE:
3189 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3190
3191void
3192cede_to (...)
3193 CODE:
3194 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3195
3196void
3197cede (...)
3198 CODE:
3199 CORO_EXECUTE_SLF_XS (slf_init_cede);
3200
3201void
3202cede_notself (...)
3203 CODE:
3204 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3205
3206void
3207_cancel (Coro::State self)
3208 CODE:
3209 coro_state_destroy (aTHX_ self);
3210 coro_call_on_destroy (aTHX_ self);
3211
3212void
3213_set_current (SV *current)
3214 PROTOTYPE: $
3215 CODE:
3216 SvREFCNT_dec (SvRV (coro_current));
3217 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3218
3219void
3220_set_readyhook (SV *hook)
3221 PROTOTYPE: $
3222 CODE:
3223 SvREFCNT_dec (coro_readyhook);
3224 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
3225
3226int
3227prio (Coro::State coro, int newprio = 0)
3228 PROTOTYPE: $;$
3229 ALIAS:
3230 nice = 1
3231 CODE:
3232{
3233 RETVAL = coro->prio;
3234
3235 if (items > 1)
3236 {
3237 if (ix)
3238 newprio = coro->prio - newprio;
3239
3240 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
3241 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
3242
3243 coro->prio = newprio;
3244 }
3245}
3246 OUTPUT:
3247 RETVAL
3248
3249SV *
3250ready (SV *self)
3251 PROTOTYPE: $
3252 CODE:
3253 RETVAL = boolSV (api_ready (aTHX_ self));
3254 OUTPUT:
3255 RETVAL
3256
3257int
3258nready (...)
3259 PROTOTYPE:
3260 CODE:
3261 RETVAL = coro_nready;
3262 OUTPUT:
3263 RETVAL
3264
3265void
3266_pool_handler (...)
3267 CODE:
3268 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3269
3270void
3271async_pool (SV *cv, ...)
3272 PROTOTYPE: &@
3273 PPCODE:
3274{
3275 HV *hv = (HV *)av_pop (av_async_pool);
3276 AV *av = newAV ();
3277 SV *cb = ST (0);
3278 int i;
3279
839 av_fill (defav, items - 1); 3280 av_extend (av, items - 2);
840 while (items--) 3281 for (i = 1; i < items; ++i)
841 av_store (defav, items, SvREFCNT_inc (ST(items))); 3282 av_push (av, SvREFCNT_inc_NN (ST (i)));
842 3283
843 mg_get (returnstk); /* isn't documentation wrong for mg_get? */ 3284 if ((SV *)hv == &PL_sv_undef)
844 sv = av_pop ((AV *)SvRV (returnstk)); 3285 {
845 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))); 3286 PUSHMARK (SP);
846 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))); 3287 EXTEND (SP, 2);
3288 PUSHs (sv_Coro);
3289 PUSHs ((SV *)cv_pool_handler);
3290 PUTBACK;
3291 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3292 SPAGAIN;
3293
3294 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3295 }
3296
3297 {
3298 struct coro *coro = SvSTATE_hv (hv);
3299
3300 assert (!coro->invoke_cb);
3301 assert (!coro->invoke_av);
3302 coro->invoke_cb = SvREFCNT_inc (cb);
3303 coro->invoke_av = av;
3304 }
3305
3306 api_ready (aTHX_ (SV *)hv);
3307
3308 if (GIMME_V != G_VOID)
3309 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3310 else
847 SvREFCNT_dec (sv); 3311 SvREFCNT_dec (hv);
3312}
848 3313
849 transfer(aTHX_ prev, next, 0); 3314SV *
3315rouse_cb ()
3316 PROTOTYPE:
3317 CODE:
3318 RETVAL = coro_new_rouse_cb (aTHX);
3319 OUTPUT:
3320 RETVAL
850 3321
3322void
3323rouse_wait (...)
3324 PROTOTYPE: ;$
3325 PPCODE:
3326 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3327
3328
3329MODULE = Coro::State PACKAGE = PerlIO::cede
3330
3331BOOT:
3332 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3333
3334
3335MODULE = Coro::State PACKAGE = Coro::Semaphore
3336
3337SV *
3338new (SV *klass, SV *count = 0)
3339 CODE:
3340 RETVAL = sv_bless (
3341 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3342 GvSTASH (CvGV (cv))
3343 );
3344 OUTPUT:
3345 RETVAL
3346
3347# helper for Coro::Channel
3348SV *
3349_alloc (int count)
3350 CODE:
3351 RETVAL = coro_waitarray_new (aTHX_ count);
3352 OUTPUT:
3353 RETVAL
3354
3355SV *
3356count (SV *self)
3357 CODE:
3358 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3359 OUTPUT:
3360 RETVAL
3361
3362void
3363up (SV *self, int adjust = 1)
3364 ALIAS:
3365 adjust = 1
3366 CODE:
3367 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3368
3369void
3370down (...)
3371 CODE:
3372 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3373
3374void
3375wait (...)
3376 CODE:
3377 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3378
3379void
3380try (SV *self)
3381 PPCODE:
3382{
3383 AV *av = (AV *)SvRV (self);
3384 SV *count_sv = AvARRAY (av)[0];
3385 IV count = SvIVX (count_sv);
3386
3387 if (count > 0)
3388 {
3389 --count;
3390 SvIVX (count_sv) = count;
3391 XSRETURN_YES;
3392 }
3393 else
3394 XSRETURN_NO;
3395}
3396
3397void
3398waiters (SV *self)
3399 PPCODE:
3400{
3401 AV *av = (AV *)SvRV (self);
3402 int wcount = AvFILLp (av) + 1 - 1;
3403
3404 if (GIMME_V == G_SCALAR)
3405 XPUSHs (sv_2mortal (newSViv (wcount)));
3406 else
3407 {
3408 int i;
3409 EXTEND (SP, wcount);
3410 for (i = 1; i <= wcount; ++i)
3411 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3412 }
3413}
3414
3415MODULE = Coro::State PACKAGE = Coro::Signal
3416
3417SV *
3418new (SV *klass)
3419 CODE:
3420 RETVAL = sv_bless (
3421 coro_waitarray_new (aTHX_ 0),
3422 GvSTASH (CvGV (cv))
3423 );
3424 OUTPUT:
3425 RETVAL
3426
3427void
3428wait (...)
3429 CODE:
3430 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3431
3432void
3433broadcast (SV *self)
3434 CODE:
3435{
3436 AV *av = (AV *)SvRV (self);
3437 coro_signal_wake (aTHX_ av, AvFILLp (av));
3438}
3439
3440void
3441send (SV *self)
3442 CODE:
3443{
3444 AV *av = (AV *)SvRV (self);
3445
3446 if (AvFILLp (av))
3447 coro_signal_wake (aTHX_ av, 1);
3448 else
3449 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3450}
3451
3452IV
3453awaited (SV *self)
3454 CODE:
3455 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3456 OUTPUT:
3457 RETVAL
3458
3459
3460MODULE = Coro::State PACKAGE = Coro::AnyEvent
3461
3462BOOT:
3463 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3464
3465void
3466_schedule (...)
3467 CODE:
3468{
3469 static int incede;
3470
3471 api_cede_notself (aTHX);
3472
3473 ++incede;
3474 while (coro_nready >= incede && api_cede (aTHX))
3475 ;
3476
3477 sv_setsv (sv_activity, &PL_sv_undef);
3478 if (coro_nready >= incede)
3479 {
3480 PUSHMARK (SP);
3481 PUTBACK;
3482 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3483 }
3484
3485 --incede;
3486}
3487
3488
3489MODULE = Coro::State PACKAGE = Coro::AIO
3490
3491void
3492_register (char *target, char *proto, SV *req)
3493 CODE:
3494{
3495 CV *req_cv = coro_sv_2cv (aTHX_ req);
3496 /* newXSproto doesn't return the CV on 5.8 */
3497 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3498 sv_setpv ((SV *)slf_cv, proto);
3499 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3500}
3501

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