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Comparing Coro/Coro/State.xs (file contents):
Revision 1.53 by pcg, Sat Feb 14 12:39:41 2004 UTC vs.
Revision 1.315 by root, Thu Nov 20 05:25:17 2008 UTC

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

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