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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 1.338 by root, Sun Dec 7 15:33:21 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 trying to save and restore the hash elements, we just provide
775 * readback here.
776 */
777static int
778coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
779{
780 const char *s = MgPV_nolen_const (mg);
781
782 if (*s == '_')
589 } 783 {
590} 784 SV **svp = 0;
591 785
786 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
787 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
788
789 if (svp)
790 {
791 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
792 return 0;
793 }
794 }
795
796 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
797}
798
592static void 799static int
593setup_coro (void *arg) 800coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
801{
802 const char *s = MgPV_nolen_const (mg);
803
804 if (*s == '_')
805 {
806 SV **svp = 0;
807
808 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
809 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
810
811 if (svp)
812 {
813 SV *old = *svp;
814 *svp = 0;
815 SvREFCNT_dec (old);
816 return 0;
817 }
818 }
819
820 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
821}
822
823static int
824coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
825{
826 const char *s = MgPV_nolen_const (mg);
827
828 if (*s == '_')
829 {
830 SV **svp = 0;
831
832 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
833 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
834
835 if (svp)
836 {
837 SV *old = *svp;
838 *svp = SvOK (sv) ? newSVsv (sv) : 0;
839 SvREFCNT_dec (old);
840 return 0;
841 }
842 }
843
844 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
845}
846
847static void
848prepare_nop (pTHX_ struct coro_transfer_args *ta)
849{
850 /* kind of mega-hacky, but works */
851 ta->next = ta->prev = (struct coro *)ta;
852}
853
854static int
855slf_check_nop (pTHX_ struct CoroSLF *frame)
856{
857 return 0;
858}
859
860static int
861slf_check_repeat (pTHX_ struct CoroSLF *frame)
862{
863 return 1;
864}
865
866static UNOP coro_setup_op;
867
868static void NOINLINE /* noinline to keep it out of the transfer fast path */
869coro_setup (pTHX_ struct coro *coro)
594{ 870{
595 /* 871 /*
596 * emulate part of the perl startup here. 872 * emulate part of the perl startup here.
597 */ 873 */
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); 874 coro_init_stacks (aTHX);
603 JMPENV_BOOTSTRAP;
604 SPAGAIN;
605 875
606 /*PL_curcop = 0;*/ 876 PL_runops = RUNOPS_DEFAULT;
877 PL_curcop = &PL_compiling;
878 PL_in_eval = EVAL_NULL;
879 PL_comppad = 0;
880 PL_comppad_name = 0;
881 PL_comppad_name_fill = 0;
882 PL_comppad_name_floor = 0;
883 PL_curpm = 0;
884 PL_curpad = 0;
885 PL_localizing = 0;
886 PL_dirty = 0;
887 PL_restartop = 0;
888#if PERL_VERSION_ATLEAST (5,10,0)
889 PL_parser = 0;
890#endif
891 PL_hints = 0;
892
893 /* recreate the die/warn hooks */
894 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
895 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
896
897 GvSV (PL_defgv) = newSV (0);
898 GvAV (PL_defgv) = coro->args; coro->args = 0;
899 GvSV (PL_errgv) = newSV (0);
900 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
901 GvHV (PL_hintgv) = 0;
902 PL_rs = newSVsv (GvSV (irsgv));
903 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
904
905 {
906 dSP;
907 UNOP myop;
908
909 Zero (&myop, 1, UNOP);
910 myop.op_next = Nullop;
911 myop.op_type = OP_ENTERSUB;
912 myop.op_flags = OPf_WANT_VOID;
913
914 PUSHMARK (SP);
915 PUSHs ((SV *)coro->startcv);
916 PUTBACK;
917 PL_op = (OP *)&myop;
918 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
919 }
920
921 /* this newly created coroutine might be run on an existing cctx which most
922 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
923 */
924 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
925 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
926
927 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
928 coro_setup_op.op_next = PL_op;
929 coro_setup_op.op_type = OP_ENTERSUB;
930 coro_setup_op.op_ppaddr = pp_slf;
931 /* no flags etc. required, as an init function won't be called */
932
933 PL_op = (OP *)&coro_setup_op;
934
935 /* copy throw, in case it was set before coro_setup */
936 CORO_THROW = coro->except;
937}
938
939static void
940coro_unwind_stacks (pTHX)
941{
942 if (!IN_DESTRUCT)
943 {
944 /* restore all saved variables and stuff */
945 LEAVE_SCOPE (0);
946 assert (PL_tmps_floor == -1);
947
948 /* free all temporaries */
949 FREETMPS;
950 assert (PL_tmps_ix == -1);
951
952 /* unwind all extra stacks */
953 POPSTACK_TO (PL_mainstack);
954
955 /* unwind main stack */
956 dounwind (-1);
957 }
958}
959
960static void
961coro_destruct_perl (pTHX_ struct coro *coro)
962{
963 coro_unwind_stacks (aTHX);
964
965 SvREFCNT_dec (GvSV (PL_defgv));
607 SvREFCNT_dec (GvAV (PL_defgv)); 966 SvREFCNT_dec (GvAV (PL_defgv));
608 GvAV (PL_defgv) = ctx->args; 967 SvREFCNT_dec (GvSV (PL_errgv));
968 SvREFCNT_dec (PL_defoutgv);
969 SvREFCNT_dec (PL_rs);
970 SvREFCNT_dec (GvSV (irsgv));
971 SvREFCNT_dec (GvHV (PL_hintgv));
609 972
973 SvREFCNT_dec (PL_diehook);
974 SvREFCNT_dec (PL_warnhook);
975
976 SvREFCNT_dec (coro->saved_deffh);
977 SvREFCNT_dec (coro->rouse_cb);
978 SvREFCNT_dec (coro->invoke_cb);
979 SvREFCNT_dec (coro->invoke_av);
980
981 coro_destruct_stacks (aTHX);
982}
983
984INLINE void
985free_coro_mortal (pTHX)
986{
987 if (expect_true (coro_mortal))
988 {
989 SvREFCNT_dec (coro_mortal);
990 coro_mortal = 0;
991 }
992}
993
994static int
995runops_trace (pTHX)
996{
997 COP *oldcop = 0;
998 int oldcxix = -2;
999
1000 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1001 {
1002 PERL_ASYNC_CHECK ();
1003
1004 if (cctx_current->flags & CC_TRACE_ALL)
1005 {
1006 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1007 {
1008 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1009 SV **bot, **top;
1010 AV *av = newAV (); /* return values */
1011 SV **cb;
1012 dSP;
1013
1014 GV *gv = CvGV (cx->blk_sub.cv);
1015 SV *fullname = sv_2mortal (newSV (0));
1016 if (isGV (gv))
1017 gv_efullname3 (fullname, gv, 0);
1018
1019 bot = PL_stack_base + cx->blk_oldsp + 1;
1020 top = cx->blk_gimme == G_ARRAY ? SP + 1
1021 : cx->blk_gimme == G_SCALAR ? bot + 1
1022 : bot;
1023
1024 av_extend (av, top - bot);
1025 while (bot < top)
1026 av_push (av, SvREFCNT_inc_NN (*bot++));
1027
1028 PL_runops = RUNOPS_DEFAULT;
1029 ENTER;
1030 SAVETMPS;
1031 EXTEND (SP, 3);
1032 PUSHMARK (SP);
1033 PUSHs (&PL_sv_no);
1034 PUSHs (fullname);
1035 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1036 PUTBACK;
1037 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1038 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1039 SPAGAIN;
1040 FREETMPS;
1041 LEAVE;
1042 PL_runops = runops_trace;
1043 }
1044
1045 if (oldcop != PL_curcop)
1046 {
1047 oldcop = PL_curcop;
1048
1049 if (PL_curcop != &PL_compiling)
1050 {
1051 SV **cb;
1052
1053 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1054 {
1055 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1056
1057 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1058 {
1059 dSP;
1060 GV *gv = CvGV (cx->blk_sub.cv);
1061 SV *fullname = sv_2mortal (newSV (0));
1062
1063 if (isGV (gv))
1064 gv_efullname3 (fullname, gv, 0);
1065
1066 PL_runops = RUNOPS_DEFAULT;
1067 ENTER;
1068 SAVETMPS;
1069 EXTEND (SP, 3);
1070 PUSHMARK (SP);
1071 PUSHs (&PL_sv_yes);
1072 PUSHs (fullname);
1073 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1074 PUTBACK;
1075 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1076 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1077 SPAGAIN;
1078 FREETMPS;
1079 LEAVE;
1080 PL_runops = runops_trace;
1081 }
1082
1083 oldcxix = cxstack_ix;
1084 }
1085
1086 if (cctx_current->flags & CC_TRACE_LINE)
1087 {
1088 dSP;
1089
1090 PL_runops = RUNOPS_DEFAULT;
1091 ENTER;
1092 SAVETMPS;
1093 EXTEND (SP, 3);
1094 PL_runops = RUNOPS_DEFAULT;
1095 PUSHMARK (SP);
1096 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1097 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1098 PUTBACK;
1099 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1100 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1101 SPAGAIN;
1102 FREETMPS;
1103 LEAVE;
1104 PL_runops = runops_trace;
1105 }
1106 }
1107 }
1108 }
1109 }
1110
1111 TAINT_NOT;
1112 return 0;
1113}
1114
1115static struct CoroSLF cctx_ssl_frame;
1116
1117static void
1118slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1119{
1120 ta->prev = 0;
1121}
1122
1123static int
1124slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1125{
1126 *frame = cctx_ssl_frame;
1127
1128 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1129}
1130
1131/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1132static void NOINLINE
1133cctx_prepare (pTHX)
1134{
1135 PL_top_env = &PL_start_env;
1136
1137 if (cctx_current->flags & CC_TRACE)
1138 PL_runops = runops_trace;
1139
1140 /* we already must be executing an SLF op, there is no other valid way
1141 * that can lead to creation of a new cctx */
1142 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1143 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1144
1145 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1146 cctx_ssl_frame = slf_frame;
1147
1148 slf_frame.prepare = slf_prepare_set_stacklevel;
1149 slf_frame.check = slf_check_set_stacklevel;
1150}
1151
1152/* the tail of transfer: execute stuff we can only do after a transfer */
1153INLINE void
1154transfer_tail (pTHX)
1155{
1156 free_coro_mortal (aTHX);
1157}
1158
1159/*
1160 * this is a _very_ stripped down perl interpreter ;)
1161 */
1162static void
1163cctx_run (void *arg)
1164{
1165#ifdef USE_ITHREADS
1166# if CORO_PTHREAD
1167 PERL_SET_CONTEXT (coro_thx);
1168# endif
1169#endif
1170 {
1171 dTHX;
1172
1173 /* normally we would need to skip the entersub here */
1174 /* not doing so will re-execute it, which is exactly what we want */
1175 /* PL_nop = PL_nop->op_next */
1176
1177 /* inject a fake subroutine call to cctx_init */
1178 cctx_prepare (aTHX);
1179
1180 /* cctx_run is the alternative tail of transfer() */
1181 transfer_tail (aTHX);
1182
1183 /* somebody or something will hit me for both perl_run and PL_restartop */
1184 PL_restartop = PL_op;
1185 perl_run (PL_curinterp);
1186 /*
1187 * Unfortunately, there is no way to get at the return values of the
1188 * coro body here, as perl_run destroys these
1189 */
1190
1191 /*
1192 * If perl-run returns we assume exit() was being called or the coro
1193 * fell off the end, which seems to be the only valid (non-bug)
1194 * reason for perl_run to return. We try to exit by jumping to the
1195 * bootstrap-time "top" top_env, as we cannot restore the "main"
1196 * coroutine as Coro has no such concept.
1197 * This actually isn't valid with the pthread backend, but OSes requiring
1198 * that backend are too broken to do it in a standards-compliant way.
1199 */
1200 PL_top_env = main_top_env;
1201 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1202 }
1203}
1204
1205static coro_cctx *
1206cctx_new ()
1207{
1208 coro_cctx *cctx;
1209
1210 ++cctx_count;
1211 New (0, cctx, 1, coro_cctx);
1212
1213 cctx->gen = cctx_gen;
1214 cctx->flags = 0;
1215 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1216
1217 return cctx;
1218}
1219
1220/* create a new cctx only suitable as source */
1221static coro_cctx *
1222cctx_new_empty ()
1223{
1224 coro_cctx *cctx = cctx_new ();
1225
1226 cctx->sptr = 0;
1227 coro_create (&cctx->cctx, 0, 0, 0, 0);
1228
1229 return cctx;
1230}
1231
1232/* create a new cctx suitable as destination/running a perl interpreter */
1233static coro_cctx *
1234cctx_new_run ()
1235{
1236 coro_cctx *cctx = cctx_new ();
1237 void *stack_start;
1238 size_t stack_size;
1239
1240#if HAVE_MMAP
1241 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1242 /* mmap supposedly does allocate-on-write for us */
1243 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1244
1245 if (cctx->sptr != (void *)-1)
1246 {
1247 #if CORO_STACKGUARD
1248 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1249 #endif
1250 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1251 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1252 cctx->flags |= CC_MAPPED;
1253 }
1254 else
1255#endif
1256 {
1257 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1258 New (0, cctx->sptr, cctx_stacksize, long);
1259
1260 if (!cctx->sptr)
1261 {
1262 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1263 _exit (EXIT_FAILURE);
1264 }
1265
1266 stack_start = cctx->sptr;
1267 stack_size = cctx->ssize;
1268 }
1269
1270 #if CORO_USE_VALGRIND
1271 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1272 #endif
1273
1274 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1275
1276 return cctx;
1277}
1278
1279static void
1280cctx_destroy (coro_cctx *cctx)
1281{
1282 if (!cctx)
1283 return;
1284
1285 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1286
1287 --cctx_count;
1288 coro_destroy (&cctx->cctx);
1289
1290 /* coro_transfer creates new, empty cctx's */
610 if (ctx->stack) 1291 if (cctx->sptr)
1292 {
1293 #if CORO_USE_VALGRIND
1294 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1295 #endif
1296
1297#if HAVE_MMAP
1298 if (cctx->flags & CC_MAPPED)
1299 munmap (cctx->sptr, cctx->ssize);
1300 else
1301#endif
1302 Safefree (cctx->sptr);
611 { 1303 }
612 ctx->cursp = 0;
613 1304
1305 Safefree (cctx);
1306}
1307
1308/* wether this cctx should be destructed */
1309#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1310
1311static coro_cctx *
1312cctx_get (pTHX)
1313{
1314 while (expect_true (cctx_first))
1315 {
1316 coro_cctx *cctx = cctx_first;
1317 cctx_first = cctx->next;
1318 --cctx_idle;
1319
1320 if (expect_true (!CCTX_EXPIRED (cctx)))
1321 return cctx;
1322
1323 cctx_destroy (cctx);
1324 }
1325
1326 return cctx_new_run ();
1327}
1328
1329static void
1330cctx_put (coro_cctx *cctx)
1331{
1332 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1333
1334 /* free another cctx if overlimit */
1335 if (expect_false (cctx_idle >= cctx_max_idle))
1336 {
1337 coro_cctx *first = cctx_first;
1338 cctx_first = first->next;
1339 --cctx_idle;
1340
1341 cctx_destroy (first);
1342 }
1343
1344 ++cctx_idle;
1345 cctx->next = cctx_first;
1346 cctx_first = cctx;
1347}
1348
1349/** coroutine switching *****************************************************/
1350
1351static void
1352transfer_check (pTHX_ struct coro *prev, struct coro *next)
1353{
1354 /* TODO: throwing up here is considered harmful */
1355
1356 if (expect_true (prev != next))
1357 {
1358 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1359 croak ("Coro::State::transfer called with a suspended prev Coro::State, but can only transfer from running or new states,");
1360
1361 if (expect_false (next->flags & CF_RUNNING))
1362 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1363
1364 if (expect_false (next->flags & CF_DESTROYED))
1365 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1366
1367#if !PERL_VERSION_ATLEAST (5,10,0)
1368 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1369 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1370#endif
1371 }
1372}
1373
1374/* always use the TRANSFER macro */
1375static void NOINLINE /* noinline so we have a fixed stackframe */
1376transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1377{
1378 dSTACKLEVEL;
1379
1380 /* sometimes transfer is only called to set idle_sp */
1381 if (expect_false (!prev))
1382 {
1383 cctx_current->idle_sp = STACKLEVEL;
1384 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1385 }
1386 else if (expect_true (prev != next))
1387 {
1388 coro_cctx *cctx_prev;
1389
1390 if (expect_false (prev->flags & CF_NEW))
1391 {
1392 /* create a new empty/source context */
1393 prev->flags &= ~CF_NEW;
1394 prev->flags |= CF_RUNNING;
1395 }
1396
1397 prev->flags &= ~CF_RUNNING;
1398 next->flags |= CF_RUNNING;
1399
1400 /* first get rid of the old state */
1401 save_perl (aTHX_ prev);
1402
1403 if (expect_false (next->flags & CF_NEW))
1404 {
1405 /* need to start coroutine */
1406 next->flags &= ~CF_NEW;
1407 /* setup coroutine call */
1408 coro_setup (aTHX_ next);
1409 }
1410 else
1411 load_perl (aTHX_ next);
1412
1413 /* possibly untie and reuse the cctx */
1414 if (expect_true (
1415 cctx_current->idle_sp == STACKLEVEL
1416 && !(cctx_current->flags & CC_TRACE)
1417 && !force_cctx
1418 ))
1419 {
1420 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1421 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1422
1423 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1424 /* without this the next cctx_get might destroy the running cctx while still in use */
1425 if (expect_false (CCTX_EXPIRED (cctx_current)))
1426 if (expect_true (!next->cctx))
1427 next->cctx = cctx_get (aTHX);
1428
1429 cctx_put (cctx_current);
1430 }
1431 else
1432 prev->cctx = cctx_current;
1433
1434 ++next->usecount;
1435
1436 cctx_prev = cctx_current;
1437 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1438
1439 next->cctx = 0;
1440
1441 if (expect_false (cctx_prev != cctx_current))
1442 {
1443 cctx_prev->top_env = PL_top_env;
1444 PL_top_env = cctx_current->top_env;
1445 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1446 }
1447
1448 transfer_tail (aTHX);
1449 }
1450}
1451
1452#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1453#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1454
1455/** high level stuff ********************************************************/
1456
1457static int
1458coro_state_destroy (pTHX_ struct coro *coro)
1459{
1460 if (coro->flags & CF_DESTROYED)
1461 return 0;
1462
1463 if (coro->on_destroy)
1464 coro->on_destroy (aTHX_ coro);
1465
1466 coro->flags |= CF_DESTROYED;
1467
1468 if (coro->flags & CF_READY)
1469 {
1470 /* reduce nready, as destroying a ready coro effectively unreadies it */
1471 /* alternative: look through all ready queues and remove the coro */
1472 --coro_nready;
1473 }
1474 else
1475 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1476
1477 if (coro->mainstack
1478 && coro->mainstack != main_mainstack
1479 && coro->slot
1480 && !PL_dirty)
1481 {
1482 struct coro temp;
1483
1484 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1485
1486 save_perl (aTHX_ &temp);
1487 load_perl (aTHX_ coro);
1488
1489 coro_destruct_perl (aTHX_ coro);
1490
1491 load_perl (aTHX_ &temp);
1492
1493 coro->slot = 0;
1494 }
1495
1496 cctx_destroy (coro->cctx);
1497 SvREFCNT_dec (coro->startcv);
1498 SvREFCNT_dec (coro->args);
1499 SvREFCNT_dec (CORO_THROW);
1500
1501 if (coro->next) coro->next->prev = coro->prev;
1502 if (coro->prev) coro->prev->next = coro->next;
1503 if (coro == coro_first) coro_first = coro->next;
1504
1505 return 1;
1506}
1507
1508static int
1509coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1510{
1511 struct coro *coro = (struct coro *)mg->mg_ptr;
1512 mg->mg_ptr = 0;
1513
1514 coro->hv = 0;
1515
1516 if (--coro->refcnt < 0)
1517 {
1518 coro_state_destroy (aTHX_ coro);
1519 Safefree (coro);
1520 }
1521
1522 return 0;
1523}
1524
1525static int
1526coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1527{
1528 struct coro *coro = (struct coro *)mg->mg_ptr;
1529
1530 ++coro->refcnt;
1531
1532 return 0;
1533}
1534
1535static MGVTBL coro_state_vtbl = {
1536 0, 0, 0, 0,
1537 coro_state_free,
1538 0,
1539#ifdef MGf_DUP
1540 coro_state_dup,
1541#else
1542# define MGf_DUP 0
1543#endif
1544};
1545
1546static void
1547prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1548{
1549 ta->prev = SvSTATE (prev_sv);
1550 ta->next = SvSTATE (next_sv);
1551 TRANSFER_CHECK (*ta);
1552}
1553
1554static void
1555api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1556{
1557 struct coro_transfer_args ta;
1558
1559 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1560 TRANSFER (ta, 1);
1561}
1562
1563/*****************************************************************************/
1564/* gensub: simple closure generation utility */
1565
1566#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1567
1568/* create a closure from XS, returns a code reference */
1569/* the arg can be accessed via GENSUB_ARG from the callback */
1570/* the callback must use dXSARGS/XSRETURN */
1571static SV *
1572gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1573{
1574 CV *cv = (CV *)newSV (0);
1575
1576 sv_upgrade ((SV *)cv, SVt_PVCV);
1577
1578 CvANON_on (cv);
1579 CvISXSUB_on (cv);
1580 CvXSUB (cv) = xsub;
1581 GENSUB_ARG = arg;
1582
1583 return newRV_noinc ((SV *)cv);
1584}
1585
1586/** Coro ********************************************************************/
1587
1588INLINE void
1589coro_enq (pTHX_ struct coro *coro)
1590{
1591 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1592}
1593
1594INLINE SV *
1595coro_deq (pTHX)
1596{
1597 int prio;
1598
1599 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1600 if (AvFILLp (coro_ready [prio]) >= 0)
1601 return av_shift (coro_ready [prio]);
1602
1603 return 0;
1604}
1605
1606static int
1607api_ready (pTHX_ SV *coro_sv)
1608{
1609 struct coro *coro;
1610 SV *sv_hook;
1611 void (*xs_hook)(void);
1612
1613 coro = SvSTATE (coro_sv);
1614
1615 if (coro->flags & CF_READY)
1616 return 0;
1617
1618 coro->flags |= CF_READY;
1619
1620 sv_hook = coro_nready ? 0 : coro_readyhook;
1621 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1622
1623 coro_enq (aTHX_ coro);
1624 ++coro_nready;
1625
1626 if (sv_hook)
1627 {
1628 dSP;
1629
1630 ENTER;
1631 SAVETMPS;
1632
614 PUSHMARK(SP); 1633 PUSHMARK (SP);
615 PUTBACK; 1634 PUTBACK;
616 (void) call_sv (sub_init, G_VOID|G_NOARGS); 1635 call_sv (sv_hook, G_VOID | G_DISCARD);
617 croak ("FATAL: CCTXT coroutine returned!"); 1636
618 } 1637 FREETMPS;
619 else 1638 LEAVE;
620 { 1639 }
621 UNOP myop;
622 1640
623 PL_op = (OP *)&myop; 1641 if (xs_hook)
1642 xs_hook ();
624 1643
625 Zero(&myop, 1, UNOP); 1644 return 1;
626 myop.op_next = Nullop; 1645}
627 myop.op_flags = OPf_WANT_VOID;
628 1646
629 PUSHMARK(SP); 1647static int
630 XPUSHs (sub_init); 1648api_is_ready (pTHX_ SV *coro_sv)
631 /* 1649{
632 * the next line is slightly wrong, as PL_op->op_next 1650 return !!(SvSTATE (coro_sv)->flags & CF_READY);
633 * is actually being executed so we skip the first op. 1651}
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 1652
642 ENTER; /* necessary e.g. for dounwind */ 1653/* expects to own a reference to next->hv */
1654INLINE void
1655prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1656{
1657 SV *prev_sv = SvRV (coro_current);
1658
1659 ta->prev = SvSTATE_hv (prev_sv);
1660 ta->next = next;
1661
1662 TRANSFER_CHECK (*ta);
1663
1664 SvRV_set (coro_current, (SV *)next->hv);
1665
1666 free_coro_mortal (aTHX);
1667 coro_mortal = prev_sv;
1668}
1669
1670static void
1671prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1672{
1673 for (;;)
643 } 1674 {
644} 1675 SV *next_sv = coro_deq (aTHX);
645 1676
646static void 1677 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 { 1678 {
671 SAVE (prev, flags); 1679 struct coro *next = SvSTATE_hv (next_sv);
672 LOAD (next);
673 1680
674 /* mark this state as in-use */ 1681 /* cannot transfer to destroyed coros, skip and look for next */
675 next->mainstack = 0; 1682 if (expect_false (next->flags & CF_DESTROYED))
676 next->tmps_ix = -2; 1683 SvREFCNT_dec (next_sv); /* coro_nready has already been taken care of by destroy */
677 1684 else
678 /* stacklevel changed? if yes, grab the stack for us! */
679 if (flags & TRANSFER_SAVE_CCTXT)
680 { 1685 {
681 if (!prev->stack) 1686 next->flags &= ~CF_READY;
682 allocate_stack (prev, 0); 1687 --coro_nready;
683 else if (prev->cursp != stacklevel 1688
684 && prev->stack->usecnt > 1) 1689 prepare_schedule_to (aTHX_ ta, next);
685 { 1690 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 } 1691 }
702
703 } 1692 }
704 else if (next->tmps_ix == -2)
705 croak ("tried to transfer to running coroutine");
706 else 1693 else
707 { 1694 {
708 SAVE (prev, -1); /* first get rid of the old state */ 1695 /* nothing to schedule: call the idle handler */
709 1696 if (SvROK (sv_idle)
710 if (flags & TRANSFER_SAVE_CCTXT) 1697 && SvOBJECT (SvRV (sv_idle)))
711 { 1698 {
712 if (!prev->stack) 1699 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
713 allocate_stack (prev, 0); 1700 api_ready (aTHX_ SvRV (sv_idle));
714 1701 --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 } 1702 }
733 else 1703 else
734 setup_coro (next); 1704 {
1705 dSP;
1706
1707 ENTER;
1708 SAVETMPS;
1709
1710 PUSHMARK (SP);
1711 PUTBACK;
1712 call_sv (sv_idle, G_VOID | G_DISCARD);
1713
1714 FREETMPS;
1715 LEAVE;
1716 }
735 } 1717 }
736 } 1718 }
737
738 next->cursp = stacklevel;
739} 1719}
740 1720
1721INLINE void
1722prepare_cede (pTHX_ struct coro_transfer_args *ta)
1723{
1724 api_ready (aTHX_ coro_current);
1725 prepare_schedule (aTHX_ ta);
1726}
1727
1728INLINE void
1729prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1730{
1731 SV *prev = SvRV (coro_current);
1732
1733 if (coro_nready)
1734 {
1735 prepare_schedule (aTHX_ ta);
1736 api_ready (aTHX_ prev);
1737 }
1738 else
1739 prepare_nop (aTHX_ ta);
1740}
1741
1742static void
1743api_schedule (pTHX)
1744{
1745 struct coro_transfer_args ta;
1746
1747 prepare_schedule (aTHX_ &ta);
1748 TRANSFER (ta, 1);
1749}
1750
1751static void
1752api_schedule_to (pTHX_ SV *coro_sv)
1753{
1754 struct coro_transfer_args ta;
1755 struct coro *next = SvSTATE (coro_sv);
1756
1757 SvREFCNT_inc_NN (coro_sv);
1758 prepare_schedule_to (aTHX_ &ta, next);
1759}
1760
1761static int
1762api_cede (pTHX)
1763{
1764 struct coro_transfer_args ta;
1765
1766 prepare_cede (aTHX_ &ta);
1767
1768 if (expect_true (ta.prev != ta.next))
1769 {
1770 TRANSFER (ta, 1);
1771 return 1;
1772 }
1773 else
1774 return 0;
1775}
1776
1777static int
1778api_cede_notself (pTHX)
1779{
1780 if (coro_nready)
1781 {
1782 struct coro_transfer_args ta;
1783
1784 prepare_cede_notself (aTHX_ &ta);
1785 TRANSFER (ta, 1);
1786 return 1;
1787 }
1788 else
1789 return 0;
1790}
1791
1792static void
1793api_trace (pTHX_ SV *coro_sv, int flags)
1794{
1795 struct coro *coro = SvSTATE (coro_sv);
1796
1797 if (coro->flags & CF_RUNNING)
1798 croak ("cannot enable tracing on a running coroutine, caught");
1799
1800 if (flags & CC_TRACE)
1801 {
1802 if (!coro->cctx)
1803 coro->cctx = cctx_new_run ();
1804 else if (!(coro->cctx->flags & CC_TRACE))
1805 croak ("cannot enable tracing on coroutine with custom stack, caught");
1806
1807 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1808 }
1809 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1810 {
1811 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1812
1813 if (coro->flags & CF_RUNNING)
1814 PL_runops = RUNOPS_DEFAULT;
1815 else
1816 coro->slot->runops = RUNOPS_DEFAULT;
1817 }
1818}
1819
1820static void
1821coro_call_on_destroy (pTHX_ struct coro *coro)
1822{
1823 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1824 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1825
1826 if (on_destroyp)
1827 {
1828 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1829
1830 while (AvFILLp (on_destroy) >= 0)
1831 {
1832 dSP; /* don't disturb outer sp */
1833 SV *cb = av_pop (on_destroy);
1834
1835 PUSHMARK (SP);
1836
1837 if (statusp)
1838 {
1839 int i;
1840 AV *status = (AV *)SvRV (*statusp);
1841 EXTEND (SP, AvFILLp (status) + 1);
1842
1843 for (i = 0; i <= AvFILLp (status); ++i)
1844 PUSHs (AvARRAY (status)[i]);
1845 }
1846
1847 PUTBACK;
1848 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1849 }
1850 }
1851}
1852
1853static void
1854slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1855{
1856 int i;
1857 HV *hv = (HV *)SvRV (coro_current);
1858 AV *av = newAV ();
1859
1860 av_extend (av, items - 1);
1861 for (i = 0; i < items; ++i)
1862 av_push (av, SvREFCNT_inc_NN (arg [i]));
1863
1864 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1865
1866 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1867 api_ready (aTHX_ sv_manager);
1868
1869 frame->prepare = prepare_schedule;
1870 frame->check = slf_check_repeat;
1871
1872 /* as a minor optimisation, we could unwind all stacks here */
1873 /* but that puts extra pressure on pp_slf, and is not worth much */
1874 /*coro_unwind_stacks (aTHX);*/
1875}
1876
1877/*****************************************************************************/
1878/* async pool handler */
1879
1880static int
1881slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1882{
1883 HV *hv = (HV *)SvRV (coro_current);
1884 struct coro *coro = (struct coro *)frame->data;
1885
1886 if (!coro->invoke_cb)
1887 return 1; /* loop till we have invoke */
1888 else
1889 {
1890 hv_store (hv, "desc", sizeof ("desc") - 1,
1891 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1892
1893 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1894
1895 {
1896 dSP;
1897 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1898 PUTBACK;
1899 }
1900
1901 SvREFCNT_dec (GvAV (PL_defgv));
1902 GvAV (PL_defgv) = coro->invoke_av;
1903 coro->invoke_av = 0;
1904
1905 return 0;
1906 }
1907}
1908
1909static void
1910slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1911{
1912 HV *hv = (HV *)SvRV (coro_current);
1913 struct coro *coro = SvSTATE_hv ((SV *)hv);
1914
1915 if (expect_true (coro->saved_deffh))
1916 {
1917 /* subsequent iteration */
1918 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1919 coro->saved_deffh = 0;
1920
1921 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1922 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1923 {
1924 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1925 coro->invoke_av = newAV ();
1926
1927 frame->prepare = prepare_nop;
1928 }
1929 else
1930 {
1931 av_clear (GvAV (PL_defgv));
1932 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1933
1934 coro->prio = 0;
1935
1936 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1937 api_trace (aTHX_ coro_current, 0);
1938
1939 frame->prepare = prepare_schedule;
1940 av_push (av_async_pool, SvREFCNT_inc (hv));
1941 }
1942 }
1943 else
1944 {
1945 /* first iteration, simply fall through */
1946 frame->prepare = prepare_nop;
1947 }
1948
1949 frame->check = slf_check_pool_handler;
1950 frame->data = (void *)coro;
1951}
1952
1953/*****************************************************************************/
1954/* rouse callback */
1955
1956#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1957
1958static void
1959coro_rouse_callback (pTHX_ CV *cv)
1960{
1961 dXSARGS;
1962 SV *data = (SV *)GENSUB_ARG;
1963
1964 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1965 {
1966 /* first call, set args */
1967 AV *av = newAV ();
1968 SV *coro = SvRV (data);
1969
1970 SvRV_set (data, (SV *)av);
1971 api_ready (aTHX_ coro);
1972 SvREFCNT_dec (coro);
1973
1974 /* better take a full copy of the arguments */
1975 while (items--)
1976 av_store (av, items, newSVsv (ST (items)));
1977 }
1978
1979 XSRETURN_EMPTY;
1980}
1981
1982static int
1983slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1984{
1985 SV *data = (SV *)frame->data;
1986
1987 if (CORO_THROW)
1988 return 0;
1989
1990 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1991 return 1;
1992
1993 /* now push all results on the stack */
1994 {
1995 dSP;
1996 AV *av = (AV *)SvRV (data);
1997 int i;
1998
1999 EXTEND (SP, AvFILLp (av) + 1);
2000 for (i = 0; i <= AvFILLp (av); ++i)
2001 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2002
2003 /* we have stolen the elements, so ste length to zero and free */
2004 AvFILLp (av) = -1;
2005 av_undef (av);
2006
2007 PUTBACK;
2008 }
2009
2010 return 0;
2011}
2012
2013static void
2014slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2015{
2016 SV *cb;
2017
2018 if (items)
2019 cb = arg [0];
2020 else
2021 {
2022 struct coro *coro = SvSTATE_current;
2023
2024 if (!coro->rouse_cb)
2025 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2026
2027 cb = sv_2mortal (coro->rouse_cb);
2028 coro->rouse_cb = 0;
2029 }
2030
2031 if (!SvROK (cb)
2032 || SvTYPE (SvRV (cb)) != SVt_PVCV
2033 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2034 croak ("Coro::rouse_wait called with illegal callback argument,");
2035
2036 {
2037 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2038 SV *data = (SV *)GENSUB_ARG;
2039
2040 frame->data = (void *)data;
2041 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2042 frame->check = slf_check_rouse_wait;
2043 }
2044}
2045
2046static SV *
2047coro_new_rouse_cb (pTHX)
2048{
2049 HV *hv = (HV *)SvRV (coro_current);
2050 struct coro *coro = SvSTATE_hv (hv);
2051 SV *data = newRV_inc ((SV *)hv);
2052 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2053
2054 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2055 SvREFCNT_dec (data); /* magicext increases the refcount */
2056
2057 SvREFCNT_dec (coro->rouse_cb);
2058 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2059
2060 return cb;
2061}
2062
2063/*****************************************************************************/
2064/* schedule-like-function opcode (SLF) */
2065
2066static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2067static const CV *slf_cv;
2068static SV **slf_argv;
2069static int slf_argc, slf_arga; /* count, allocated */
2070static I32 slf_ax; /* top of stack, for restore */
2071
2072/* this restores the stack in the case we patched the entersub, to */
2073/* recreate the stack frame as perl will on following calls */
2074/* since entersub cleared the stack */
2075static OP *
2076pp_restore (pTHX)
2077{
2078 int i;
2079 SV **SP = PL_stack_base + slf_ax;
2080
2081 PUSHMARK (SP);
2082
2083 EXTEND (SP, slf_argc + 1);
2084
2085 for (i = 0; i < slf_argc; ++i)
2086 PUSHs (sv_2mortal (slf_argv [i]));
2087
2088 PUSHs ((SV *)CvGV (slf_cv));
2089
2090 RETURNOP (slf_restore.op_first);
2091}
2092
2093static void
2094slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2095{
2096 SV **arg = (SV **)slf_frame.data;
2097
2098 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2099}
2100
2101static void
2102slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2103{
2104 if (items != 2)
2105 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2106
2107 frame->prepare = slf_prepare_transfer;
2108 frame->check = slf_check_nop;
2109 frame->data = (void *)arg; /* let's hope it will stay valid */
2110}
2111
2112static void
2113slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2114{
2115 frame->prepare = prepare_schedule;
2116 frame->check = slf_check_nop;
2117}
2118
2119static void
2120slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2121{
2122 struct coro *next = (struct coro *)slf_frame.data;
2123
2124 SvREFCNT_inc_NN (next->hv);
2125 prepare_schedule_to (aTHX_ ta, next);
2126}
2127
2128static void
2129slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2130{
2131 if (!items)
2132 croak ("Coro::schedule_to expects a coroutine argument, caught");
2133
2134 frame->data = (void *)SvSTATE (arg [0]);
2135 frame->prepare = slf_prepare_schedule_to;
2136 frame->check = slf_check_nop;
2137}
2138
2139static void
2140slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2141{
2142 api_ready (aTHX_ SvRV (coro_current));
2143
2144 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2145}
2146
2147static void
2148slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2149{
2150 frame->prepare = prepare_cede;
2151 frame->check = slf_check_nop;
2152}
2153
2154static void
2155slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2156{
2157 frame->prepare = prepare_cede_notself;
2158 frame->check = slf_check_nop;
2159}
2160
2161/*
2162 * these not obviously related functions are all rolled into one
2163 * function to increase chances that they all will call transfer with the same
2164 * stack offset
2165 * SLF stands for "schedule-like-function".
2166 */
2167static OP *
2168pp_slf (pTHX)
2169{
2170 I32 checkmark; /* mark SP to see how many elements check has pushed */
2171
2172 /* set up the slf frame, unless it has already been set-up */
2173 /* the latter happens when a new coro has been started */
2174 /* or when a new cctx was attached to an existing coroutine */
2175 if (expect_true (!slf_frame.prepare))
2176 {
2177 /* first iteration */
2178 dSP;
2179 SV **arg = PL_stack_base + TOPMARK + 1;
2180 int items = SP - arg; /* args without function object */
2181 SV *gv = *sp;
2182
2183 /* do a quick consistency check on the "function" object, and if it isn't */
2184 /* for us, divert to the real entersub */
2185 if (SvTYPE (gv) != SVt_PVGV
2186 || !GvCV (gv)
2187 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2188 return PL_ppaddr[OP_ENTERSUB](aTHX);
2189
2190 if (!(PL_op->op_flags & OPf_STACKED))
2191 {
2192 /* ampersand-form of call, use @_ instead of stack */
2193 AV *av = GvAV (PL_defgv);
2194 arg = AvARRAY (av);
2195 items = AvFILLp (av) + 1;
2196 }
2197
2198 /* now call the init function, which needs to set up slf_frame */
2199 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2200 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2201
2202 /* pop args */
2203 SP = PL_stack_base + POPMARK;
2204
2205 PUTBACK;
2206 }
2207
2208 /* now that we have a slf_frame, interpret it! */
2209 /* we use a callback system not to make the code needlessly */
2210 /* complicated, but so we can run multiple perl coros from one cctx */
2211
2212 do
2213 {
2214 struct coro_transfer_args ta;
2215
2216 slf_frame.prepare (aTHX_ &ta);
2217 TRANSFER (ta, 0);
2218
2219 checkmark = PL_stack_sp - PL_stack_base;
2220 }
2221 while (slf_frame.check (aTHX_ &slf_frame));
2222
2223 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2224
2225 /* exception handling */
2226 if (expect_false (CORO_THROW))
2227 {
2228 SV *exception = sv_2mortal (CORO_THROW);
2229
2230 CORO_THROW = 0;
2231 sv_setsv (ERRSV, exception);
2232 croak (0);
2233 }
2234
2235 /* return value handling - mostly like entersub */
2236 /* make sure we put something on the stack in scalar context */
2237 if (GIMME_V == G_SCALAR)
2238 {
2239 dSP;
2240 SV **bot = PL_stack_base + checkmark;
2241
2242 if (sp == bot) /* too few, push undef */
2243 bot [1] = &PL_sv_undef;
2244 else if (sp != bot + 1) /* too many, take last one */
2245 bot [1] = *sp;
2246
2247 SP = bot + 1;
2248
2249 PUTBACK;
2250 }
2251
2252 return NORMAL;
2253}
2254
2255static void
2256api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2257{
2258 int i;
2259 SV **arg = PL_stack_base + ax;
2260 int items = PL_stack_sp - arg + 1;
2261
2262 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2263
2264 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2265 && PL_op->op_ppaddr != pp_slf)
2266 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2267
2268 CvFLAGS (cv) |= CVf_SLF;
2269 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2270 slf_cv = cv;
2271
2272 /* we patch the op, and then re-run the whole call */
2273 /* we have to put the same argument on the stack for this to work */
2274 /* and this will be done by pp_restore */
2275 slf_restore.op_next = (OP *)&slf_restore;
2276 slf_restore.op_type = OP_CUSTOM;
2277 slf_restore.op_ppaddr = pp_restore;
2278 slf_restore.op_first = PL_op;
2279
2280 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2281
2282 if (PL_op->op_flags & OPf_STACKED)
2283 {
2284 if (items > slf_arga)
2285 {
2286 slf_arga = items;
2287 free (slf_argv);
2288 slf_argv = malloc (slf_arga * sizeof (SV *));
2289 }
2290
2291 slf_argc = items;
2292
2293 for (i = 0; i < items; ++i)
2294 slf_argv [i] = SvREFCNT_inc (arg [i]);
2295 }
2296 else
2297 slf_argc = 0;
2298
2299 PL_op->op_ppaddr = pp_slf;
2300 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2301
2302 PL_op = (OP *)&slf_restore;
2303}
2304
2305/*****************************************************************************/
2306/* PerlIO::cede */
2307
2308typedef struct
2309{
2310 PerlIOBuf base;
2311 NV next, every;
2312} PerlIOCede;
2313
2314static IV
2315PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2316{
2317 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2318
2319 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2320 self->next = nvtime () + self->every;
2321
2322 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2323}
2324
2325static SV *
2326PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2327{
2328 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2329
2330 return newSVnv (self->every);
2331}
2332
2333static IV
2334PerlIOCede_flush (pTHX_ PerlIO *f)
2335{
2336 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2337 double now = nvtime ();
2338
2339 if (now >= self->next)
2340 {
2341 api_cede (aTHX);
2342 self->next = now + self->every;
2343 }
2344
2345 return PerlIOBuf_flush (aTHX_ f);
2346}
2347
2348static PerlIO_funcs PerlIO_cede =
2349{
2350 sizeof(PerlIO_funcs),
2351 "cede",
2352 sizeof(PerlIOCede),
2353 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2354 PerlIOCede_pushed,
2355 PerlIOBuf_popped,
2356 PerlIOBuf_open,
2357 PerlIOBase_binmode,
2358 PerlIOCede_getarg,
2359 PerlIOBase_fileno,
2360 PerlIOBuf_dup,
2361 PerlIOBuf_read,
2362 PerlIOBuf_unread,
2363 PerlIOBuf_write,
2364 PerlIOBuf_seek,
2365 PerlIOBuf_tell,
2366 PerlIOBuf_close,
2367 PerlIOCede_flush,
2368 PerlIOBuf_fill,
2369 PerlIOBase_eof,
2370 PerlIOBase_error,
2371 PerlIOBase_clearerr,
2372 PerlIOBase_setlinebuf,
2373 PerlIOBuf_get_base,
2374 PerlIOBuf_bufsiz,
2375 PerlIOBuf_get_ptr,
2376 PerlIOBuf_get_cnt,
2377 PerlIOBuf_set_ptrcnt,
2378};
2379
2380/*****************************************************************************/
2381/* Coro::Semaphore & Coro::Signal */
2382
2383static SV *
2384coro_waitarray_new (pTHX_ int count)
2385{
2386 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2387 AV *av = newAV ();
2388 SV **ary;
2389
2390 /* unfortunately, building manually saves memory */
2391 Newx (ary, 2, SV *);
2392 AvALLOC (av) = ary;
2393#if PERL_VERSION_ATLEAST (5,10,0)
2394 AvARRAY (av) = ary;
2395#else
2396 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2397 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2398 SvPVX ((SV *)av) = (char *)ary;
2399#endif
2400 AvMAX (av) = 1;
2401 AvFILLp (av) = 0;
2402 ary [0] = newSViv (count);
2403
2404 return newRV_noinc ((SV *)av);
2405}
2406
2407/* semaphore */
2408
2409static void
2410coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2411{
2412 SV *count_sv = AvARRAY (av)[0];
2413 IV count = SvIVX (count_sv);
2414
2415 count += adjust;
2416 SvIVX (count_sv) = count;
2417
2418 /* now wake up as many waiters as are expected to lock */
2419 while (count > 0 && AvFILLp (av) > 0)
2420 {
2421 SV *cb;
2422
2423 /* swap first two elements so we can shift a waiter */
2424 AvARRAY (av)[0] = AvARRAY (av)[1];
2425 AvARRAY (av)[1] = count_sv;
2426 cb = av_shift (av);
2427
2428 if (SvOBJECT (cb))
2429 {
2430 api_ready (aTHX_ cb);
2431 --count;
2432 }
2433 else if (SvTYPE (cb) == SVt_PVCV)
2434 {
2435 dSP;
2436 PUSHMARK (SP);
2437 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2438 PUTBACK;
2439 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2440 }
2441
2442 SvREFCNT_dec (cb);
2443 }
2444}
2445
2446static void
2447coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2448{
2449 /* call $sem->adjust (0) to possibly wake up some other waiters */
2450 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2451}
2452
2453static int
2454slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2455{
2456 AV *av = (AV *)frame->data;
2457 SV *count_sv = AvARRAY (av)[0];
2458
2459 /* if we are about to throw, don't actually acquire the lock, just throw */
2460 if (CORO_THROW)
2461 return 0;
2462 else if (SvIVX (count_sv) > 0)
2463 {
2464 SvSTATE_current->on_destroy = 0;
2465
2466 if (acquire)
2467 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2468 else
2469 coro_semaphore_adjust (aTHX_ av, 0);
2470
2471 return 0;
2472 }
2473 else
2474 {
2475 int i;
2476 /* if we were woken up but can't down, we look through the whole */
2477 /* waiters list and only add us if we aren't in there already */
2478 /* this avoids some degenerate memory usage cases */
2479
2480 for (i = 1; i <= AvFILLp (av); ++i)
2481 if (AvARRAY (av)[i] == SvRV (coro_current))
2482 return 1;
2483
2484 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2485 return 1;
2486 }
2487}
2488
2489static int
2490slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2491{
2492 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2493}
2494
2495static int
2496slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2497{
2498 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2499}
2500
2501static void
2502slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2503{
2504 AV *av = (AV *)SvRV (arg [0]);
2505
2506 if (SvIVX (AvARRAY (av)[0]) > 0)
2507 {
2508 frame->data = (void *)av;
2509 frame->prepare = prepare_nop;
2510 }
2511 else
2512 {
2513 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2514
2515 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2516 frame->prepare = prepare_schedule;
2517
2518 /* to avoid race conditions when a woken-up coro gets terminated */
2519 /* we arrange for a temporary on_destroy that calls adjust (0) */
2520 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2521 }
2522}
2523
2524static void
2525slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2526{
2527 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2528 frame->check = slf_check_semaphore_down;
2529}
2530
2531static void
2532slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2533{
2534 if (items >= 2)
2535 {
2536 /* callback form */
2537 AV *av = (AV *)SvRV (arg [0]);
2538 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2539
2540 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2541
2542 if (SvIVX (AvARRAY (av)[0]) > 0)
2543 coro_semaphore_adjust (aTHX_ av, 0);
2544
2545 frame->prepare = prepare_nop;
2546 frame->check = slf_check_nop;
2547 }
2548 else
2549 {
2550 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2551 frame->check = slf_check_semaphore_wait;
2552 }
2553}
2554
2555/* signal */
2556
2557static void
2558coro_signal_wake (pTHX_ AV *av, int count)
2559{
2560 SvIVX (AvARRAY (av)[0]) = 0;
2561
2562 /* now signal count waiters */
2563 while (count > 0 && AvFILLp (av) > 0)
2564 {
2565 SV *cb;
2566
2567 /* swap first two elements so we can shift a waiter */
2568 cb = AvARRAY (av)[0];
2569 AvARRAY (av)[0] = AvARRAY (av)[1];
2570 AvARRAY (av)[1] = cb;
2571
2572 cb = av_shift (av);
2573
2574 api_ready (aTHX_ cb);
2575 sv_setiv (cb, 0); /* signal waiter */
2576 SvREFCNT_dec (cb);
2577
2578 --count;
2579 }
2580}
2581
2582static int
2583slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2584{
2585 /* if we are about to throw, also stop waiting */
2586 return SvROK ((SV *)frame->data) && !CORO_THROW;
2587}
2588
2589static void
2590slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2591{
2592 AV *av = (AV *)SvRV (arg [0]);
2593
2594 if (SvIVX (AvARRAY (av)[0]))
2595 {
2596 SvIVX (AvARRAY (av)[0]) = 0;
2597 frame->prepare = prepare_nop;
2598 frame->check = slf_check_nop;
2599 }
2600 else
2601 {
2602 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2603
2604 av_push (av, waiter);
2605
2606 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2607 frame->prepare = prepare_schedule;
2608 frame->check = slf_check_signal_wait;
2609 }
2610}
2611
2612/*****************************************************************************/
2613/* Coro::AIO */
2614
2615#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2616
2617/* helper storage struct */
2618struct io_state
2619{
2620 int errorno;
2621 I32 laststype; /* U16 in 5.10.0 */
2622 int laststatval;
2623 Stat_t statcache;
2624};
2625
2626static void
2627coro_aio_callback (pTHX_ CV *cv)
2628{
2629 dXSARGS;
2630 AV *state = (AV *)GENSUB_ARG;
2631 SV *coro = av_pop (state);
2632 SV *data_sv = newSV (sizeof (struct io_state));
2633
2634 av_extend (state, items - 1);
2635
2636 sv_upgrade (data_sv, SVt_PV);
2637 SvCUR_set (data_sv, sizeof (struct io_state));
2638 SvPOK_only (data_sv);
2639
2640 {
2641 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2642
2643 data->errorno = errno;
2644 data->laststype = PL_laststype;
2645 data->laststatval = PL_laststatval;
2646 data->statcache = PL_statcache;
2647 }
2648
2649 /* now build the result vector out of all the parameters and the data_sv */
2650 {
2651 int i;
2652
2653 for (i = 0; i < items; ++i)
2654 av_push (state, SvREFCNT_inc_NN (ST (i)));
2655 }
2656
2657 av_push (state, data_sv);
2658
2659 api_ready (aTHX_ coro);
2660 SvREFCNT_dec (coro);
2661 SvREFCNT_dec ((AV *)state);
2662}
2663
2664static int
2665slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2666{
2667 AV *state = (AV *)frame->data;
2668
2669 /* if we are about to throw, return early */
2670 /* this does not cancel the aio request, but at least */
2671 /* it quickly returns */
2672 if (CORO_THROW)
2673 return 0;
2674
2675 /* one element that is an RV? repeat! */
2676 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2677 return 1;
2678
2679 /* restore status */
2680 {
2681 SV *data_sv = av_pop (state);
2682 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2683
2684 errno = data->errorno;
2685 PL_laststype = data->laststype;
2686 PL_laststatval = data->laststatval;
2687 PL_statcache = data->statcache;
2688
2689 SvREFCNT_dec (data_sv);
2690 }
2691
2692 /* push result values */
2693 {
2694 dSP;
2695 int i;
2696
2697 EXTEND (SP, AvFILLp (state) + 1);
2698 for (i = 0; i <= AvFILLp (state); ++i)
2699 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2700
2701 PUTBACK;
2702 }
2703
2704 return 0;
2705}
2706
2707static void
2708slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2709{
2710 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2711 SV *coro_hv = SvRV (coro_current);
2712 struct coro *coro = SvSTATE_hv (coro_hv);
2713
2714 /* put our coroutine id on the state arg */
2715 av_push (state, SvREFCNT_inc_NN (coro_hv));
2716
2717 /* first see whether we have a non-zero priority and set it as AIO prio */
2718 if (coro->prio)
2719 {
2720 dSP;
2721
2722 static SV *prio_cv;
2723 static SV *prio_sv;
2724
2725 if (expect_false (!prio_cv))
2726 {
2727 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2728 prio_sv = newSViv (0);
2729 }
2730
2731 PUSHMARK (SP);
2732 sv_setiv (prio_sv, coro->prio);
2733 XPUSHs (prio_sv);
2734
2735 PUTBACK;
2736 call_sv (prio_cv, G_VOID | G_DISCARD);
2737 }
2738
2739 /* now call the original request */
2740 {
2741 dSP;
2742 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2743 int i;
2744
2745 PUSHMARK (SP);
2746
2747 /* first push all args to the stack */
2748 EXTEND (SP, items + 1);
2749
2750 for (i = 0; i < items; ++i)
2751 PUSHs (arg [i]);
2752
2753 /* now push the callback closure */
2754 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2755
2756 /* now call the AIO function - we assume our request is uncancelable */
2757 PUTBACK;
2758 call_sv ((SV *)req, G_VOID | G_DISCARD);
2759 }
2760
2761 /* now that the requets is going, we loop toll we have a result */
2762 frame->data = (void *)state;
2763 frame->prepare = prepare_schedule;
2764 frame->check = slf_check_aio_req;
2765}
2766
2767static void
2768coro_aio_req_xs (pTHX_ CV *cv)
2769{
2770 dXSARGS;
2771
2772 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2773
2774 XSRETURN_EMPTY;
2775}
2776
2777/*****************************************************************************/
2778
2779#if CORO_CLONE
2780# include "clone.c"
2781#endif
2782
741MODULE = Coro::State PACKAGE = Coro::State 2783MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
742 2784
743PROTOTYPES: ENABLE 2785PROTOTYPES: DISABLE
744 2786
745BOOT: 2787BOOT:
746{ /* {} necessary for stoopid perl-5.6.x */ 2788{
747 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2789#ifdef USE_ITHREADS
748 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2790# if CORO_PTHREAD
2791 coro_thx = PERL_GET_CONTEXT;
2792# endif
2793#endif
2794 BOOT_PAGESIZE;
2795
2796 cctx_current = cctx_new_empty ();
2797
2798 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2799 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2800
2801 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2802 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2803 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2804
2805 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2806 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2807 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2808
749 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2809 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
750 2810
751 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2811 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
752 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2812 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
753 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2813 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
754 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2814 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
755
756 if (!padlist_cache)
757 padlist_cache = newHV ();
758 2815
759 main_mainstack = PL_mainstack; 2816 main_mainstack = PL_mainstack;
760} 2817 main_top_env = PL_top_env;
761 2818
762Coro::State 2819 while (main_top_env->je_prev)
763_newprocess(args) 2820 main_top_env = main_top_env->je_prev;
764 SV * args 2821
765 PROTOTYPE: $ 2822 {
2823 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2824
2825 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2826 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2827
2828 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2829 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2830 }
2831
2832 coroapi.ver = CORO_API_VERSION;
2833 coroapi.rev = CORO_API_REVISION;
2834
2835 coroapi.transfer = api_transfer;
2836
2837 coroapi.sv_state = SvSTATE_;
2838 coroapi.execute_slf = api_execute_slf;
2839 coroapi.prepare_nop = prepare_nop;
2840 coroapi.prepare_schedule = prepare_schedule;
2841 coroapi.prepare_cede = prepare_cede;
2842 coroapi.prepare_cede_notself = prepare_cede_notself;
2843
2844 {
2845 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2846
2847 if (!svp) croak ("Time::HiRes is required");
2848 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2849
2850 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2851 }
2852
2853 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2854}
2855
2856SV *
2857new (char *klass, ...)
2858 ALIAS:
2859 Coro::new = 1
766 CODE: 2860 CODE:
767 Coro__State coro; 2861{
2862 struct coro *coro;
2863 MAGIC *mg;
2864 HV *hv;
2865 CV *cb;
2866 int i;
768 2867
769 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 2868 if (items > 1)
770 croak ("Coro::State::_newprocess expects an arrayref");
771 2869 {
2870 cb = coro_sv_2cv (aTHX_ ST (1));
2871
2872 if (!ix)
2873 {
2874 if (CvISXSUB (cb))
2875 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2876
2877 if (!CvROOT (cb))
2878 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2879 }
2880 }
2881
772 New (0, coro, 1, struct coro); 2882 Newz (0, coro, 1, struct coro);
2883 coro->args = newAV ();
2884 coro->flags = CF_NEW;
773 2885
774 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2886 if (coro_first) coro_first->prev = coro;
775 coro->mainstack = 0; /* actual work is done inside transfer */ 2887 coro->next = coro_first;
776 coro->stack = 0; 2888 coro_first = coro;
777 2889
778 RETVAL = coro; 2890 coro->hv = hv = newHV ();
2891 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2892 mg->mg_flags |= MGf_DUP;
2893 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2894
2895 if (items > 1)
2896 {
2897 av_extend (coro->args, items - 1 + ix - 1);
2898
2899 if (ix)
2900 {
2901 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2902 cb = cv_coro_run;
2903 }
2904
2905 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2906
2907 for (i = 2; i < items; i++)
2908 av_push (coro->args, newSVsv (ST (i)));
2909 }
2910}
779 OUTPUT: 2911 OUTPUT:
780 RETVAL 2912 RETVAL
781 2913
782void 2914void
783transfer(prev, next, flags = TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK) 2915transfer (...)
784 Coro::State_or_hashref prev
785 Coro::State_or_hashref next
786 int flags
787 PROTOTYPE: @ 2916 PROTOTYPE: $$
788 CODE: 2917 CODE:
789 transfer (aTHX_ prev, next, flags); 2918 CORO_EXECUTE_SLF_XS (slf_init_transfer);
2919
2920bool
2921_destroy (SV *coro_sv)
2922 CODE:
2923 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2924 OUTPUT:
2925 RETVAL
790 2926
791void 2927void
792DESTROY(coro) 2928_exit (int code)
793 Coro::State coro 2929 PROTOTYPE: $
794 CODE: 2930 CODE:
2931 _exit (code);
795 2932
796 if (coro->mainstack && coro->mainstack != main_mainstack) 2933SV *
2934clone (Coro::State coro)
2935 CODE:
2936{
2937#if CORO_CLONE
2938 struct coro *ncoro = coro_clone (aTHX_ coro);
2939 MAGIC *mg;
2940 /* TODO: too much duplication */
2941 ncoro->hv = newHV ();
2942 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
2943 mg->mg_flags |= MGf_DUP;
2944 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
2945#else
2946 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
2947#endif
2948}
2949 OUTPUT:
2950 RETVAL
2951
2952int
2953cctx_stacksize (int new_stacksize = 0)
2954 PROTOTYPE: ;$
2955 CODE:
2956 RETVAL = cctx_stacksize;
2957 if (new_stacksize)
2958 {
2959 cctx_stacksize = new_stacksize;
2960 ++cctx_gen;
2961 }
2962 OUTPUT:
2963 RETVAL
2964
2965int
2966cctx_max_idle (int max_idle = 0)
2967 PROTOTYPE: ;$
2968 CODE:
2969 RETVAL = cctx_max_idle;
2970 if (max_idle > 1)
2971 cctx_max_idle = max_idle;
2972 OUTPUT:
2973 RETVAL
2974
2975int
2976cctx_count ()
2977 PROTOTYPE:
2978 CODE:
2979 RETVAL = cctx_count;
2980 OUTPUT:
2981 RETVAL
2982
2983int
2984cctx_idle ()
2985 PROTOTYPE:
2986 CODE:
2987 RETVAL = cctx_idle;
2988 OUTPUT:
2989 RETVAL
2990
2991void
2992list ()
2993 PROTOTYPE:
2994 PPCODE:
2995{
2996 struct coro *coro;
2997 for (coro = coro_first; coro; coro = coro->next)
2998 if (coro->hv)
2999 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3000}
3001
3002void
3003call (Coro::State coro, SV *coderef)
3004 ALIAS:
3005 eval = 1
3006 CODE:
3007{
3008 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
797 { 3009 {
798 struct coro temp; 3010 struct coro temp;
799 3011
800 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 3012 if (!(coro->flags & CF_RUNNING))
801 LOAD(aTHX_ coro); 3013 {
3014 PUTBACK;
3015 save_perl (aTHX_ &temp);
3016 load_perl (aTHX_ coro);
3017 }
802 3018
803 destroy_stacks (aTHX); 3019 {
3020 dSP;
3021 ENTER;
3022 SAVETMPS;
3023 PUTBACK;
3024 PUSHSTACK;
3025 PUSHMARK (SP);
804 3026
805 LOAD((&temp)); /* this will get rid of defsv etc.. */ 3027 if (ix)
3028 eval_sv (coderef, 0);
3029 else
3030 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
806 3031
807 coro->mainstack = 0; 3032 POPSTACK;
3033 SPAGAIN;
3034 FREETMPS;
3035 LEAVE;
3036 PUTBACK;
3037 }
3038
3039 if (!(coro->flags & CF_RUNNING))
3040 {
3041 save_perl (aTHX_ coro);
3042 load_perl (aTHX_ &temp);
3043 SPAGAIN;
3044 }
808 } 3045 }
3046}
809 3047
810 deallocate_stack (coro); 3048SV *
811 3049is_ready (Coro::State coro)
812 Safefree (coro); 3050 PROTOTYPE: $
3051 ALIAS:
3052 is_ready = CF_READY
3053 is_running = CF_RUNNING
3054 is_new = CF_NEW
3055 is_destroyed = CF_DESTROYED
3056 CODE:
3057 RETVAL = boolSV (coro->flags & ix);
3058 OUTPUT:
3059 RETVAL
813 3060
814void 3061void
815flush() 3062throw (Coro::State self, SV *throw = &PL_sv_undef)
3063 PROTOTYPE: $;$
3064 CODE:
3065{
3066 struct coro *current = SvSTATE_current;
3067 SV **throwp = self == current ? &CORO_THROW : &self->except;
3068 SvREFCNT_dec (*throwp);
3069 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3070}
3071
3072void
3073api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3074 PROTOTYPE: $;$
3075 C_ARGS: aTHX_ coro, flags
3076
3077SV *
3078has_cctx (Coro::State coro)
3079 PROTOTYPE: $
816 CODE: 3080 CODE:
817#ifdef MAY_FLUSH 3081 /* maybe manage the running flag differently */
818 flush_padlist_cache (); 3082 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
819#endif 3083 OUTPUT:
3084 RETVAL
820 3085
821MODULE = Coro::State PACKAGE = Coro::Cont 3086int
3087is_traced (Coro::State coro)
3088 PROTOTYPE: $
3089 CODE:
3090 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3091 OUTPUT:
3092 RETVAL
822 3093
823# this is slightly dirty 3094UV
3095rss (Coro::State coro)
3096 PROTOTYPE: $
3097 ALIAS:
3098 usecount = 1
3099 CODE:
3100 switch (ix)
3101 {
3102 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3103 case 1: RETVAL = coro->usecount; break;
3104 }
3105 OUTPUT:
3106 RETVAL
824 3107
825void 3108void
826yield(...) 3109force_cctx ()
3110 PROTOTYPE:
3111 CODE:
3112 cctx_current->idle_sp = 0;
3113
3114void
3115swap_defsv (Coro::State self)
827 PROTOTYPE: @ 3116 PROTOTYPE: $
3117 ALIAS:
3118 swap_defav = 1
828 CODE: 3119 CODE:
829 static SV *returnstk; 3120 if (!self->slot)
830 SV *sv; 3121 croak ("cannot swap state with coroutine that has no saved state,");
831 AV *defav = GvAV (PL_defgv); 3122 else
832 struct coro *prev, *next; 3123 {
3124 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3125 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
833 3126
834 if (!returnstk) 3127 SV *tmp = *src; *src = *dst; *dst = tmp;
835 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 3128 }
836 3129
837 /* set up @_ -- ugly */ 3130
838 av_clear (defav); 3131MODULE = Coro::State PACKAGE = Coro
3132
3133BOOT:
3134{
3135 int i;
3136
3137 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3138 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3139 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3140 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3141 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3142 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3143 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3144 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3145 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3146
3147 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3148 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3149 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3150 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3151
3152 coro_stash = gv_stashpv ("Coro", TRUE);
3153
3154 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
3155 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
3156 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
3157 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
3158 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
3159 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
3160
3161 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
3162 coro_ready[i] = newAV ();
3163
3164 {
3165 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
3166
3167 coroapi.schedule = api_schedule;
3168 coroapi.schedule_to = api_schedule_to;
3169 coroapi.cede = api_cede;
3170 coroapi.cede_notself = api_cede_notself;
3171 coroapi.ready = api_ready;
3172 coroapi.is_ready = api_is_ready;
3173 coroapi.nready = coro_nready;
3174 coroapi.current = coro_current;
3175
3176 /*GCoroAPI = &coroapi;*/
3177 sv_setiv (sv, (IV)&coroapi);
3178 SvREADONLY_on (sv);
3179 }
3180}
3181
3182void
3183terminate (...)
3184 CODE:
3185 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3186
3187void
3188schedule (...)
3189 CODE:
3190 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3191
3192void
3193schedule_to (...)
3194 CODE:
3195 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3196
3197void
3198cede_to (...)
3199 CODE:
3200 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3201
3202void
3203cede (...)
3204 CODE:
3205 CORO_EXECUTE_SLF_XS (slf_init_cede);
3206
3207void
3208cede_notself (...)
3209 CODE:
3210 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3211
3212void
3213_cancel (Coro::State self)
3214 CODE:
3215 coro_state_destroy (aTHX_ self);
3216 coro_call_on_destroy (aTHX_ self);
3217
3218void
3219_set_current (SV *current)
3220 PROTOTYPE: $
3221 CODE:
3222 SvREFCNT_dec (SvRV (coro_current));
3223 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3224
3225void
3226_set_readyhook (SV *hook)
3227 PROTOTYPE: $
3228 CODE:
3229 SvREFCNT_dec (coro_readyhook);
3230 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
3231
3232int
3233prio (Coro::State coro, int newprio = 0)
3234 PROTOTYPE: $;$
3235 ALIAS:
3236 nice = 1
3237 CODE:
3238{
3239 RETVAL = coro->prio;
3240
3241 if (items > 1)
3242 {
3243 if (ix)
3244 newprio = coro->prio - newprio;
3245
3246 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
3247 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
3248
3249 coro->prio = newprio;
3250 }
3251}
3252 OUTPUT:
3253 RETVAL
3254
3255SV *
3256ready (SV *self)
3257 PROTOTYPE: $
3258 CODE:
3259 RETVAL = boolSV (api_ready (aTHX_ self));
3260 OUTPUT:
3261 RETVAL
3262
3263int
3264nready (...)
3265 PROTOTYPE:
3266 CODE:
3267 RETVAL = coro_nready;
3268 OUTPUT:
3269 RETVAL
3270
3271void
3272_pool_handler (...)
3273 CODE:
3274 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3275
3276void
3277async_pool (SV *cv, ...)
3278 PROTOTYPE: &@
3279 PPCODE:
3280{
3281 HV *hv = (HV *)av_pop (av_async_pool);
3282 AV *av = newAV ();
3283 SV *cb = ST (0);
3284 int i;
3285
839 av_fill (defav, items - 1); 3286 av_extend (av, items - 2);
840 while (items--) 3287 for (i = 1; i < items; ++i)
841 av_store (defav, items, SvREFCNT_inc (ST(items))); 3288 av_push (av, SvREFCNT_inc_NN (ST (i)));
842 3289
843 mg_get (returnstk); /* isn't documentation wrong for mg_get? */ 3290 if ((SV *)hv == &PL_sv_undef)
844 sv = av_pop ((AV *)SvRV (returnstk)); 3291 {
845 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))); 3292 PUSHMARK (SP);
846 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))); 3293 EXTEND (SP, 2);
3294 PUSHs (sv_Coro);
3295 PUSHs ((SV *)cv_pool_handler);
3296 PUTBACK;
3297 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3298 SPAGAIN;
3299
3300 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3301 }
3302
3303 {
3304 struct coro *coro = SvSTATE_hv (hv);
3305
3306 assert (!coro->invoke_cb);
3307 assert (!coro->invoke_av);
3308 coro->invoke_cb = SvREFCNT_inc (cb);
3309 coro->invoke_av = av;
3310 }
3311
3312 api_ready (aTHX_ (SV *)hv);
3313
3314 if (GIMME_V != G_VOID)
3315 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3316 else
847 SvREFCNT_dec (sv); 3317 SvREFCNT_dec (hv);
3318}
848 3319
849 transfer(aTHX_ prev, next, 0); 3320SV *
3321rouse_cb ()
3322 PROTOTYPE:
3323 CODE:
3324 RETVAL = coro_new_rouse_cb (aTHX);
3325 OUTPUT:
3326 RETVAL
850 3327
3328void
3329rouse_wait (...)
3330 PROTOTYPE: ;$
3331 PPCODE:
3332 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3333
3334
3335MODULE = Coro::State PACKAGE = PerlIO::cede
3336
3337BOOT:
3338 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3339
3340
3341MODULE = Coro::State PACKAGE = Coro::Semaphore
3342
3343SV *
3344new (SV *klass, SV *count = 0)
3345 CODE:
3346 RETVAL = sv_bless (
3347 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3348 GvSTASH (CvGV (cv))
3349 );
3350 OUTPUT:
3351 RETVAL
3352
3353# helper for Coro::Channel
3354SV *
3355_alloc (int count)
3356 CODE:
3357 RETVAL = coro_waitarray_new (aTHX_ count);
3358 OUTPUT:
3359 RETVAL
3360
3361SV *
3362count (SV *self)
3363 CODE:
3364 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3365 OUTPUT:
3366 RETVAL
3367
3368void
3369up (SV *self, int adjust = 1)
3370 ALIAS:
3371 adjust = 1
3372 CODE:
3373 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3374
3375void
3376down (...)
3377 CODE:
3378 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3379
3380void
3381wait (...)
3382 CODE:
3383 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3384
3385void
3386try (SV *self)
3387 PPCODE:
3388{
3389 AV *av = (AV *)SvRV (self);
3390 SV *count_sv = AvARRAY (av)[0];
3391 IV count = SvIVX (count_sv);
3392
3393 if (count > 0)
3394 {
3395 --count;
3396 SvIVX (count_sv) = count;
3397 XSRETURN_YES;
3398 }
3399 else
3400 XSRETURN_NO;
3401}
3402
3403void
3404waiters (SV *self)
3405 PPCODE:
3406{
3407 AV *av = (AV *)SvRV (self);
3408 int wcount = AvFILLp (av) + 1 - 1;
3409
3410 if (GIMME_V == G_SCALAR)
3411 XPUSHs (sv_2mortal (newSViv (wcount)));
3412 else
3413 {
3414 int i;
3415 EXTEND (SP, wcount);
3416 for (i = 1; i <= wcount; ++i)
3417 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3418 }
3419}
3420
3421MODULE = Coro::State PACKAGE = Coro::Signal
3422
3423SV *
3424new (SV *klass)
3425 CODE:
3426 RETVAL = sv_bless (
3427 coro_waitarray_new (aTHX_ 0),
3428 GvSTASH (CvGV (cv))
3429 );
3430 OUTPUT:
3431 RETVAL
3432
3433void
3434wait (...)
3435 CODE:
3436 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3437
3438void
3439broadcast (SV *self)
3440 CODE:
3441{
3442 AV *av = (AV *)SvRV (self);
3443 coro_signal_wake (aTHX_ av, AvFILLp (av));
3444}
3445
3446void
3447send (SV *self)
3448 CODE:
3449{
3450 AV *av = (AV *)SvRV (self);
3451
3452 if (AvFILLp (av))
3453 coro_signal_wake (aTHX_ av, 1);
3454 else
3455 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3456}
3457
3458IV
3459awaited (SV *self)
3460 CODE:
3461 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3462 OUTPUT:
3463 RETVAL
3464
3465
3466MODULE = Coro::State PACKAGE = Coro::AnyEvent
3467
3468BOOT:
3469 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3470
3471void
3472_schedule (...)
3473 CODE:
3474{
3475 static int incede;
3476
3477 api_cede_notself (aTHX);
3478
3479 ++incede;
3480 while (coro_nready >= incede && api_cede (aTHX))
3481 ;
3482
3483 sv_setsv (sv_activity, &PL_sv_undef);
3484 if (coro_nready >= incede)
3485 {
3486 PUSHMARK (SP);
3487 PUTBACK;
3488 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3489 }
3490
3491 --incede;
3492}
3493
3494
3495MODULE = Coro::State PACKAGE = Coro::AIO
3496
3497void
3498_register (char *target, char *proto, SV *req)
3499 CODE:
3500{
3501 CV *req_cv = coro_sv_2cv (aTHX_ req);
3502 /* newXSproto doesn't return the CV on 5.8 */
3503 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3504 sv_setpv ((SV *)slf_cv, proto);
3505 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3506}
3507

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