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Comparing Coro/Coro/State.xs (file contents):
Revision 1.75 by root, Thu Oct 26 06:50:20 2006 UTC vs.
Revision 1.382 by root, Thu Feb 10 08:06:27 2011 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1
5
6#include "libcoro/coro.c"
7
1#define PERL_NO_GET_CONTEXT 8#define PERL_NO_GET_CONTEXT
2 9#define PERL_EXT
3#include "libcoro/coro.c"
4 10
5#include "EXTERN.h" 11#include "EXTERN.h"
6#include "perl.h" 12#include "perl.h"
7#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
8 15
9#include "patchlevel.h" 16#include "schmorp.h"
10 17
11#if PERL_VERSION < 6 18#include <stdio.h>
12# ifndef PL_ppaddr 19#include <errno.h>
13# define PL_ppaddr ppaddr 20#include <assert.h>
14# endif 21
15# ifndef call_sv
16# define call_sv perl_call_sv
17# endif
18# ifndef get_sv
19# define get_sv perl_get_sv
20# endif
21# ifndef get_cv
22# define get_cv perl_get_cv
23# endif
24# ifndef IS_PADGV
25# define IS_PADGV(v) 0
26# endif
27# ifndef IS_PADCONST 22#ifndef SVs_PADSTALE
28# define IS_PADCONST(v) 0 23# define SVs_PADSTALE 0
29# endif
30#endif 24#endif
31 25
32#include <errno.h> 26#ifdef WIN32
33#include <signal.h> 27# undef setjmp
28# undef longjmp
29# undef _exit
30# define setjmp _setjmp /* deep magic */
31#else
32# include <inttypes.h> /* most portable stdint.h */
33#endif
34 34
35#ifdef HAVE_MMAP 35#ifdef HAVE_MMAP
36# include <unistd.h> 36# include <unistd.h>
37# include <sys/mman.h> 37# include <sys/mman.h>
38# ifndef MAP_ANONYMOUS 38# ifndef MAP_ANONYMOUS
… …
40# define MAP_ANONYMOUS MAP_ANON 40# define MAP_ANONYMOUS MAP_ANON
41# else 41# else
42# undef HAVE_MMAP 42# undef HAVE_MMAP
43# endif 43# endif
44# endif 44# endif
45# include <limits.h>
46# ifndef PAGESIZE
47# define PAGESIZE pagesize
48# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
49static long pagesize;
50# else
51# define BOOT_PAGESIZE (void)0
52# endif
53#else
54# define PAGESIZE 0
55# define BOOT_PAGESIZE (void)0
45#endif 56#endif
46 57
47#define SUB_INIT "Coro::State::initialize" 58#if CORO_USE_VALGRIND
48#define UCORO_STATE "_coro_state" 59# include <valgrind/valgrind.h>
60#endif
49 61
50/* The next macro should declare a variable stacklevel that contains and approximation 62/* the maximum number of idle cctx that will be pooled */
51 * to the current C stack pointer. Its property is that it changes with each call 63static int cctx_max_idle = 4;
52 * and should be unique. */ 64
65#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
66# undef CORO_STACKGUARD
67#endif
68
69#ifndef CORO_STACKGUARD
70# define CORO_STACKGUARD 0
71#endif
72
73/* prefer perl internal functions over our own? */
74#ifndef CORO_PREFER_PERL_FUNCTIONS
75# define CORO_PREFER_PERL_FUNCTIONS 0
76#endif
77
78/* The next macros try to return the current stack pointer, in an as
79 * portable way as possible. */
80#if __GNUC__ >= 4
81# define dSTACKLEVEL int stacklevel_dummy
82# define STACKLEVEL __builtin_frame_address (0)
83#else
84# define dSTACKLEVEL volatile void *stacklevel
53#define dSTACKLEVEL void *stacklevel = &stacklevel 85# define STACKLEVEL ((void *)&stacklevel)
86#endif
54 87
55#define IN_DESTRUCT (PL_main_cv == Nullcv) 88#define IN_DESTRUCT PL_dirty
56 89
57#define labs(l) ((l) >= 0 ? (l) : -(l)) 90#if __GNUC__ >= 3
91# define attribute(x) __attribute__(x)
92# define expect(expr,value) __builtin_expect ((expr), (value))
93# define INLINE static inline
94#else
95# define attribute(x)
96# define expect(expr,value) (expr)
97# define INLINE static
98#endif
99
100#define expect_false(expr) expect ((expr) != 0, 0)
101#define expect_true(expr) expect ((expr) != 0, 1)
102
103#define NOINLINE attribute ((noinline))
58 104
59#include "CoroAPI.h" 105#include "CoroAPI.h"
106#define GCoroAPI (&coroapi) /* very sneaky */
60 107
61#ifdef USE_ITHREADS 108#ifdef USE_ITHREADS
62static perl_mutex coro_mutex; 109# if CORO_PTHREAD
63# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 110static void *coro_thx;
64# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 111# endif
65#else
66# define LOCK (void)0
67# define UNLOCK (void)0
68#endif 112#endif
69 113
114#ifdef __linux
115# include <time.h> /* for timespec */
116# include <syscall.h> /* for SYS_* */
117# ifdef SYS_clock_gettime
118# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
119# define CORO_CLOCK_MONOTONIC 1
120# define CORO_CLOCK_THREAD_CPUTIME_ID 3
121# endif
122#endif
123
124static double (*nvtime)(); /* so why doesn't it take void? */
125static void (*u2time)(pTHX_ UV ret[2]);
126
127/* we hijack an hopefully unused CV flag for our purposes */
128#define CVf_SLF 0x4000
129static OP *pp_slf (pTHX);
130
131static U32 cctx_gen;
132static size_t cctx_stacksize = CORO_STACKSIZE;
70static struct CoroAPI coroapi; 133static struct CoroAPI coroapi;
71static AV *main_mainstack; /* used to differentiate between $main and others */ 134static AV *main_mainstack; /* used to differentiate between $main and others */
135static JMPENV *main_top_env;
72static HV *coro_state_stash; 136static HV *coro_state_stash, *coro_stash;
73static SV *ucoro_state_sv;
74static U32 ucoro_state_hash;
75static SV *coro_mortal; /* will be freed after next transfer */ 137static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
76 138
77/* this is actually not only the c stack but also c registers etc... */ 139static AV *av_destroy; /* destruction queue */
140static SV *sv_manager; /* the manager coro */
141static SV *sv_idle; /* $Coro::idle */
142
143static GV *irsgv; /* $/ */
144static GV *stdoutgv; /* *STDOUT */
145static SV *rv_diehook;
146static SV *rv_warnhook;
147static HV *hv_sig; /* %SIG */
148
149/* async_pool helper stuff */
150static SV *sv_pool_rss;
151static SV *sv_pool_size;
152static SV *sv_async_pool_idle; /* description string */
153static AV *av_async_pool; /* idle pool */
154static SV *sv_Coro; /* class string */
155static CV *cv_pool_handler;
156
157/* Coro::AnyEvent */
158static SV *sv_activity;
159
160/* enable processtime/realtime profiling */
161static char enable_times;
162typedef U32 coro_ts[2];
163static coro_ts time_real, time_cpu;
164static char times_valid;
165
166static struct coro_cctx *cctx_first;
167static int cctx_count, cctx_idle;
168
169enum {
170 CC_MAPPED = 0x01,
171 CC_NOREUSE = 0x02, /* throw this away after tracing */
172 CC_TRACE = 0x04,
173 CC_TRACE_SUB = 0x08, /* trace sub calls */
174 CC_TRACE_LINE = 0x10, /* trace each statement */
175 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
176};
177
178/* this is a structure representing a c-level coroutine */
78typedef struct { 179typedef struct coro_cctx
79 int refcnt; /* pointer reference counter */ 180{
80 int usecnt; /* shared by how many coroutines */ 181 struct coro_cctx *next;
81 int gencnt; /* generation counter */
82 182
183 /* the stack */
184 void *sptr;
185 size_t ssize;
186
187 /* cpu state */
188 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
189 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
190 JMPENV *top_env;
83 coro_context cctx; 191 coro_context cctx;
84 192
85 void *sptr; 193 U32 gen;
86 long ssize; /* positive == mmap, otherwise malloc */ 194#if CORO_USE_VALGRIND
87} coro_stack; 195 int valgrind_id;
196#endif
197 unsigned char flags;
198} coro_cctx;
88 199
200coro_cctx *cctx_current; /* the currently running cctx */
201
202/*****************************************************************************/
203
204enum {
205 CF_RUNNING = 0x0001, /* coroutine is running */
206 CF_READY = 0x0002, /* coroutine is ready */
207 CF_NEW = 0x0004, /* has never been switched to */
208 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
209 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
210};
211
212/* the structure where most of the perl state is stored, overlaid on the cxstack */
213typedef struct
214{
215 SV *defsv;
216 AV *defav;
217 SV *errsv;
218 SV *irsgv;
219 HV *hinthv;
220#define VAR(name,type) type name;
221# include "state.h"
222#undef VAR
223} perl_slots;
224
225#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
226
227/* this is a structure representing a perl-level coroutine */
89struct coro { 228struct coro {
90 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 229 /* the C coroutine allocated to this perl coroutine, if any */
91 JMPENV start_env; 230 coro_cctx *cctx;
92 231
93 /* the optional C context */ 232 /* ready queue */
94 coro_stack *stack; 233 struct coro *next_ready;
95 void *cursp;
96 int gencnt;
97 234
98 /* optionally saved, might be zero */ 235 /* state data */
99 AV *defav; 236 struct CoroSLF slf_frame; /* saved slf frame */
100 SV *defsv;
101 SV *errsv;
102
103 /* saved global state not related to stacks */
104 U8 dowarn;
105 I32 in_eval;
106
107 /* the stacks and related info (callchain etc..) */
108 PERL_SI *curstackinfo;
109 AV *curstack;
110 AV *mainstack; 237 AV *mainstack;
111 SV **stack_sp; 238 perl_slots *slot; /* basically the saved sp */
112 OP *op;
113 SV **curpad;
114 AV *comppad;
115 CV *compcv;
116 SV **stack_base;
117 SV **stack_max;
118 SV **tmps_stack;
119 I32 tmps_floor;
120 I32 tmps_ix;
121 I32 tmps_max;
122 I32 *markstack;
123 I32 *markstack_ptr;
124 I32 *markstack_max;
125 I32 *scopestack;
126 I32 scopestack_ix;
127 I32 scopestack_max;
128 ANY *savestack;
129 I32 savestack_ix;
130 I32 savestack_max;
131 OP **retstack;
132 I32 retstack_ix;
133 I32 retstack_max;
134 PMOP *curpm;
135 COP *curcop;
136 JMPENV *top_env;
137 239
240 CV *startcv; /* the CV to execute */
138 /* data associated with this coroutine (initial args) */ 241 AV *args; /* data associated with this coroutine (initial args) */
139 AV *args; 242 int refcnt; /* coroutines are refcounted, yes */
243 int flags; /* CF_ flags */
244 HV *hv; /* the perl hash associated with this coro, if any */
245 void (*on_destroy)(pTHX_ struct coro *coro);
246
247 /* statistics */
248 int usecount; /* number of transfers to this coro */
249
250 /* coro process data */
251 int prio;
252 SV *except; /* exception to be thrown */
253 SV *rouse_cb;
254
255 /* async_pool */
256 SV *saved_deffh;
257 SV *invoke_cb;
258 AV *invoke_av;
259
260 /* on_enter/on_leave */
261 AV *on_enter;
262 AV *on_leave;
263
264 /* swap_sv */
265 AV *swap_sv;
266
267 /* times */
268 coro_ts t_cpu, t_real;
269
270 /* linked list */
271 struct coro *next, *prev;
140}; 272};
141 273
142typedef struct coro *Coro__State; 274typedef struct coro *Coro__State;
143typedef struct coro *Coro__State_or_hashref; 275typedef struct coro *Coro__State_or_hashref;
144 276
145/* mostly copied from op.c:cv_clone2 */ 277/* the following variables are effectively part of the perl context */
146STATIC AV * 278/* and get copied between struct coro and these variables */
147clone_padlist (pTHX_ AV *protopadlist) 279/* the mainr easonw e don't support windows process emulation */
280static struct CoroSLF slf_frame; /* the current slf frame */
281
282/** Coro ********************************************************************/
283
284#define CORO_PRIO_MAX 3
285#define CORO_PRIO_HIGH 1
286#define CORO_PRIO_NORMAL 0
287#define CORO_PRIO_LOW -1
288#define CORO_PRIO_IDLE -3
289#define CORO_PRIO_MIN -4
290
291/* for Coro.pm */
292static SV *coro_current;
293static SV *coro_readyhook;
294static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
295static CV *cv_coro_run, *cv_coro_terminate;
296static struct coro *coro_first;
297#define coro_nready coroapi.nready
298
299/** Coro::Select ************************************************************/
300
301static OP *(*coro_old_pp_sselect) (pTHX);
302static SV *coro_select_select;
303
304/* horrible hack, but if it works... */
305static OP *
306coro_pp_sselect (pTHX)
148{ 307{
149 AV *av; 308 dSP;
150 I32 ix; 309 PUSHMARK (SP - 4); /* fake argument list */
151 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 310 XPUSHs (coro_select_select);
152 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 311 PUTBACK;
153 SV **pname = AvARRAY (protopad_name); 312
154 SV **ppad = AvARRAY (protopad); 313 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
155 I32 fname = AvFILLp (protopad_name); 314 PL_op->op_flags |= OPf_STACKED;
156 I32 fpad = AvFILLp (protopad); 315 PL_op->op_private = 0;
316 return PL_ppaddr [OP_ENTERSUB](aTHX);
317}
318
319/** lowlevel stuff **********************************************************/
320
321static SV *
322coro_get_sv (pTHX_ const char *name, int create)
323{
324#if PERL_VERSION_ATLEAST (5,10,0)
325 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
326 get_sv (name, create);
327#endif
328 return get_sv (name, create);
329}
330
331static AV *
332coro_get_av (pTHX_ const char *name, int create)
333{
334#if PERL_VERSION_ATLEAST (5,10,0)
335 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
336 get_av (name, create);
337#endif
338 return get_av (name, create);
339}
340
341static HV *
342coro_get_hv (pTHX_ const char *name, int create)
343{
344#if PERL_VERSION_ATLEAST (5,10,0)
345 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
346 get_hv (name, create);
347#endif
348 return get_hv (name, create);
349}
350
351INLINE void
352coro_times_update ()
353{
354#ifdef coro_clock_gettime
355 struct timespec ts;
356
357 ts.tv_sec = ts.tv_nsec = 0;
358 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
359 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
360
361 ts.tv_sec = ts.tv_nsec = 0;
362 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
363 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
364#else
365 dTHX;
366 UV tv[2];
367
368 u2time (aTHX_ tv);
369 time_real [0] = tv [0];
370 time_real [1] = tv [1] * 1000;
371#endif
372}
373
374INLINE void
375coro_times_add (struct coro *c)
376{
377 c->t_real [1] += time_real [1];
378 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
379 c->t_real [0] += time_real [0];
380
381 c->t_cpu [1] += time_cpu [1];
382 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
383 c->t_cpu [0] += time_cpu [0];
384}
385
386INLINE void
387coro_times_sub (struct coro *c)
388{
389 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
390 c->t_real [1] -= time_real [1];
391 c->t_real [0] -= time_real [0];
392
393 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
394 c->t_cpu [1] -= time_cpu [1];
395 c->t_cpu [0] -= time_cpu [0];
396}
397
398/*****************************************************************************/
399/* magic glue */
400
401#define CORO_MAGIC_type_cv 26
402#define CORO_MAGIC_type_state PERL_MAGIC_ext
403
404#define CORO_MAGIC_NN(sv, type) \
405 (expect_true (SvMAGIC (sv)->mg_type == type) \
406 ? SvMAGIC (sv) \
407 : mg_find (sv, type))
408
409#define CORO_MAGIC(sv, type) \
410 (expect_true (SvMAGIC (sv)) \
411 ? CORO_MAGIC_NN (sv, type) \
412 : 0)
413
414#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
415#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
416
417INLINE struct coro *
418SvSTATE_ (pTHX_ SV *coro)
419{
420 HV *stash;
421 MAGIC *mg;
422
423 if (SvROK (coro))
424 coro = SvRV (coro);
425
426 if (expect_false (SvTYPE (coro) != SVt_PVHV))
427 croak ("Coro::State object required");
428
429 stash = SvSTASH (coro);
430 if (expect_false (stash != coro_stash && stash != coro_state_stash))
431 {
432 /* very slow, but rare, check */
433 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
434 croak ("Coro::State object required");
435 }
436
437 mg = CORO_MAGIC_state (coro);
438 return (struct coro *)mg->mg_ptr;
439}
440
441#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
442
443/* faster than SvSTATE, but expects a coroutine hv */
444#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
445#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
446
447/*****************************************************************************/
448/* padlist management and caching */
449
450static AV *
451coro_derive_padlist (pTHX_ CV *cv)
452{
453 AV *padlist = CvPADLIST (cv);
157 AV *newpadlist, *newpad_name, *newpad; 454 AV *newpadlist, *newpad;
158 SV **npad;
159
160 newpad_name = newAV ();
161 for (ix = fname; ix >= 0; ix--)
162 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
163
164 newpad = newAV ();
165 av_fill (newpad, AvFILLp (protopad));
166 npad = AvARRAY (newpad);
167 455
168 newpadlist = newAV (); 456 newpadlist = newAV ();
169 AvREAL_off (newpadlist); 457 AvREAL_off (newpadlist);
170 av_store (newpadlist, 0, (SV *) newpad_name); 458#if PERL_VERSION_ATLEAST (5,10,0)
459 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
460#else
461 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
462#endif
463 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
464 --AvFILLp (padlist);
465
466 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
171 av_store (newpadlist, 1, (SV *) newpad); 467 av_store (newpadlist, 1, (SV *)newpad);
172 468
173 av = newAV (); /* will be @_ */ 469 return newpadlist;
174 av_extend (av, 0); 470}
175 av_store (newpad, 0, (SV *) av);
176 AvREIFY_on (av);
177 471
178 for (ix = fpad; ix > 0; ix--) 472static void
473free_padlist (pTHX_ AV *padlist)
474{
475 /* may be during global destruction */
476 if (!IN_DESTRUCT)
179 { 477 {
180 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 478 I32 i = AvFILLp (padlist);
181 479
182 if (namesv && namesv != &PL_sv_undef) 480 while (i > 0) /* special-case index 0 */
183 { 481 {
184 char *name = SvPVX (namesv); /* XXX */ 482 /* we try to be extra-careful here */
483 AV *av = (AV *)AvARRAY (padlist)[i--];
484 I32 j = AvFILLp (av);
185 485
186 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 486 while (j >= 0)
187 { /* lexical from outside? */ 487 SvREFCNT_dec (AvARRAY (av)[j--]);
188 npad[ix] = SvREFCNT_inc (ppad[ix]);
189 }
190 else
191 { /* our own lexical */
192 SV *sv;
193 if (*name == '&')
194 sv = SvREFCNT_inc (ppad[ix]);
195 else if (*name == '@')
196 sv = (SV *) newAV ();
197 else if (*name == '%')
198 sv = (SV *) newHV ();
199 else
200 sv = NEWSV (0, 0);
201 488
202#ifdef SvPADBUSY 489 AvFILLp (av) = -1;
203 if (!SvPADBUSY (sv)) 490 SvREFCNT_dec (av);
204#endif
205 SvPADMY_on (sv);
206
207 npad[ix] = sv;
208 }
209 } 491 }
210 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
211 {
212 npad[ix] = SvREFCNT_inc (ppad[ix]);
213 }
214 else
215 {
216 SV *sv = NEWSV (0, 0);
217 SvPADTMP_on (sv);
218 npad[ix] = sv;
219 }
220 }
221 492
222#if 0 /* return -ENOTUNDERSTOOD */ 493 SvREFCNT_dec (AvARRAY (padlist)[0]);
223 /* Now that vars are all in place, clone nested closures. */
224 494
225 for (ix = fpad; ix > 0; ix--) {
226 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
227 if (namesv
228 && namesv != &PL_sv_undef
229 && !(SvFLAGS(namesv) & SVf_FAKE)
230 && *SvPVX(namesv) == '&'
231 && CvCLONE(ppad[ix]))
232 {
233 CV *kid = cv_clone((CV*)ppad[ix]);
234 SvREFCNT_dec(ppad[ix]);
235 CvCLONE_on(kid);
236 SvPADMY_on(kid);
237 npad[ix] = (SV*)kid;
238 }
239 }
240#endif
241
242 return newpadlist;
243}
244
245STATIC void
246free_padlist (pTHX_ AV *padlist)
247{
248 /* may be during global destruction */
249 if (SvREFCNT (padlist))
250 {
251 I32 i = AvFILLp (padlist); 495 AvFILLp (padlist) = -1;
252 while (i >= 0)
253 {
254 SV **svp = av_fetch (padlist, i--, FALSE);
255 if (svp)
256 {
257 SV *sv;
258 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
259 SvREFCNT_dec (sv);
260
261 SvREFCNT_dec (*svp);
262 }
263 }
264
265 SvREFCNT_dec ((SV*)padlist); 496 SvREFCNT_dec ((SV*)padlist);
266 } 497 }
267} 498}
268 499
269STATIC int 500static int
270coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 501coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
271{ 502{
272 AV *padlist; 503 AV *padlist;
273 AV *av = (AV *)mg->mg_obj; 504 AV *av = (AV *)mg->mg_obj;
505
506 /* perl manages to free our internal AV and _then_ call us */
507 if (IN_DESTRUCT)
508 return 0;
274 509
275 /* casting is fun. */ 510 /* casting is fun. */
276 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 511 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
277 free_padlist (aTHX_ padlist); 512 free_padlist (aTHX_ padlist);
278 513
279 SvREFCNT_dec (av); 514 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
280}
281 515
282#define PERL_MAGIC_coro PERL_MAGIC_ext 516 return 0;
517}
283 518
284static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 519static MGVTBL coro_cv_vtbl = {
520 0, 0, 0, 0,
521 coro_cv_free
522};
285 523
286/* the next two functions merely cache the padlists */ 524/* the next two functions merely cache the padlists */
287STATIC void 525static void
288get_padlist (pTHX_ CV *cv) 526get_padlist (pTHX_ CV *cv)
289{ 527{
290 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 528 MAGIC *mg = CORO_MAGIC_cv (cv);
529 AV *av;
291 530
292 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 531 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
293 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 532 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
294 else 533 else
534 {
535#if CORO_PREFER_PERL_FUNCTIONS
536 /* this is probably cleaner? but also slower! */
537 /* in practise, it seems to be less stable */
538 CV *cp = Perl_cv_clone (aTHX_ cv);
539 CvPADLIST (cv) = CvPADLIST (cp);
540 CvPADLIST (cp) = 0;
541 SvREFCNT_dec (cp);
542#else
295 CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv)); 543 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
544#endif
545 }
296} 546}
297 547
298STATIC void 548static void
299put_padlist (pTHX_ CV *cv) 549put_padlist (pTHX_ CV *cv)
300{ 550{
301 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 551 MAGIC *mg = CORO_MAGIC_cv (cv);
552 AV *av;
302 553
303 if (!mg) 554 if (expect_false (!mg))
555 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
556
557 av = (AV *)mg->mg_obj;
558
559 if (expect_false (AvFILLp (av) >= AvMAX (av)))
560 av_extend (av, AvFILLp (av) + 1);
561
562 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
563}
564
565/** load & save, init *******************************************************/
566
567/* swap sv heads, at least logically */
568static void
569swap_svs (pTHX_ Coro__State c)
570{
571 int i;
572
573 for (i = 0; i <= AvFILLp (c->swap_sv); )
574 {
575 SV *a = AvARRAY (c->swap_sv)[i++];
576 SV *b = AvARRAY (c->swap_sv)[i++];
577
578 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
579 SV tmp;
580
581 /* swap sv_any */
582 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
583
584 /* swap sv_flags */
585 SvFLAGS (&tmp) = SvFLAGS (a);
586 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
587 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
588
589#if PERL_VERSION_ATLEAST (5,10,0)
590 /* perl 5.10 complicates this _quite_ a bit, but it also is
591 * is much faster, so no quarrels here. alternatively, we could
592 * sv_upgrade to avoid this.
593 */
304 { 594 {
305 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0); 595 /* swap sv_u */
306 mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 596 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
307 mg->mg_virtual = &vtbl_coro; 597
308 mg->mg_obj = (SV *)newAV (); 598 /* if SvANY points to the head, we need to adjust the pointers,
599 * as the pointer for a still points to b, and maybe vice versa.
600 */
601 #define svany_in_head(type) \
602 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
603
604 if (svany_in_head (SvTYPE (a)))
605 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
606
607 if (svany_in_head (SvTYPE (b)))
608 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
309 } 609 }
310 610#endif
311 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 611 }
312} 612}
313 613
314#define SB do { 614#define SWAP_SVS(coro) \
315#define SE } while (0) 615 if (expect_false ((coro)->swap_sv)) \
616 swap_svs (aTHX_ (coro))
316 617
317#define LOAD(state) load_state(aTHX_ (state));
318#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
319
320#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
321
322static void 618static void
619on_enterleave_call (pTHX_ SV *cb);
620
621static void
323load_state(pTHX_ Coro__State c) 622load_perl (pTHX_ Coro__State c)
324{ 623{
325 PL_dowarn = c->dowarn; 624 perl_slots *slot = c->slot;
326 PL_in_eval = c->in_eval; 625 c->slot = 0;
327 626
328 PL_curstackinfo = c->curstackinfo;
329 PL_curstack = c->curstack;
330 PL_mainstack = c->mainstack; 627 PL_mainstack = c->mainstack;
331 PL_stack_sp = c->stack_sp;
332 PL_op = c->op;
333 PL_curpad = c->curpad;
334 PL_comppad = c->comppad;
335 PL_compcv = c->compcv;
336 PL_stack_base = c->stack_base;
337 PL_stack_max = c->stack_max;
338 PL_tmps_stack = c->tmps_stack;
339 PL_tmps_floor = c->tmps_floor;
340 PL_tmps_ix = c->tmps_ix;
341 PL_tmps_max = c->tmps_max;
342 PL_markstack = c->markstack;
343 PL_markstack_ptr = c->markstack_ptr;
344 PL_markstack_max = c->markstack_max;
345 PL_scopestack = c->scopestack;
346 PL_scopestack_ix = c->scopestack_ix;
347 PL_scopestack_max = c->scopestack_max;
348 PL_savestack = c->savestack;
349 PL_savestack_ix = c->savestack_ix;
350 PL_savestack_max = c->savestack_max;
351#if PERL_VERSION < 9
352 PL_retstack = c->retstack;
353 PL_retstack_ix = c->retstack_ix;
354 PL_retstack_max = c->retstack_max;
355#endif
356 PL_curpm = c->curpm;
357 PL_curcop = c->curcop;
358 PL_top_env = c->top_env;
359 628
360 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 629 GvSV (PL_defgv) = slot->defsv;
361 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 630 GvAV (PL_defgv) = slot->defav;
362 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 631 GvSV (PL_errgv) = slot->errsv;
632 GvSV (irsgv) = slot->irsgv;
633 GvHV (PL_hintgv) = slot->hinthv;
634
635 #define VAR(name,type) PL_ ## name = slot->name;
636 # include "state.h"
637 #undef VAR
363 638
364 { 639 {
365 dSP; 640 dSP;
641
366 CV *cv; 642 CV *cv;
367 643
368 /* now do the ugly restore mess */ 644 /* now do the ugly restore mess */
369 while ((cv = (CV *)POPs)) 645 while (expect_true (cv = (CV *)POPs))
370 { 646 {
371 AV *padlist = (AV *)POPs;
372
373 if (padlist)
374 {
375 put_padlist (aTHX_ cv); /* mark this padlist as available */ 647 put_padlist (aTHX_ cv); /* mark this padlist as available */
376 CvPADLIST(cv) = padlist; 648 CvDEPTH (cv) = PTR2IV (POPs);
377 } 649 CvPADLIST (cv) = (AV *)POPs;
378
379 ++CvDEPTH(cv);
380 } 650 }
381 651
382 PUTBACK; 652 PUTBACK;
383 } 653 }
384}
385 654
655 slf_frame = c->slf_frame;
656 CORO_THROW = c->except;
657
658 if (expect_false (enable_times))
659 {
660 if (expect_false (!times_valid))
661 coro_times_update ();
662
663 coro_times_sub (c);
664 }
665
666 if (expect_false (c->on_enter))
667 {
668 int i;
669
670 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
671 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
672 }
673
674 SWAP_SVS (c);
675}
676
386static void 677static void
387save_state(pTHX_ Coro__State c, int flags) 678save_perl (pTHX_ Coro__State c)
388{ 679{
680 SWAP_SVS (c);
681
682 if (expect_false (c->on_leave))
683 {
684 int i;
685
686 for (i = AvFILLp (c->on_leave); i >= 0; --i)
687 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
688 }
689
690 times_valid = 0;
691
692 if (expect_false (enable_times))
693 {
694 coro_times_update (); times_valid = 1;
695 coro_times_add (c);
696 }
697
698 c->except = CORO_THROW;
699 c->slf_frame = slf_frame;
700
389 { 701 {
390 dSP; 702 dSP;
391 I32 cxix = cxstack_ix; 703 I32 cxix = cxstack_ix;
392 PERL_CONTEXT *ccstk = cxstack; 704 PERL_CONTEXT *ccstk = cxstack;
393 PERL_SI *top_si = PL_curstackinfo; 705 PERL_SI *top_si = PL_curstackinfo;
… …
395 /* 707 /*
396 * the worst thing you can imagine happens first - we have to save 708 * the worst thing you can imagine happens first - we have to save
397 * (and reinitialize) all cv's in the whole callchain :( 709 * (and reinitialize) all cv's in the whole callchain :(
398 */ 710 */
399 711
400 PUSHs (Nullsv); 712 XPUSHs (Nullsv);
401 /* this loop was inspired by pp_caller */ 713 /* this loop was inspired by pp_caller */
402 for (;;) 714 for (;;)
403 { 715 {
404 while (cxix >= 0) 716 while (expect_true (cxix >= 0))
405 { 717 {
406 PERL_CONTEXT *cx = &ccstk[cxix--]; 718 PERL_CONTEXT *cx = &ccstk[cxix--];
407 719
408 if (CxTYPE(cx) == CXt_SUB) 720 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
409 { 721 {
410 CV *cv = cx->blk_sub.cv; 722 CV *cv = cx->blk_sub.cv;
723
411 if (CvDEPTH(cv)) 724 if (expect_true (CvDEPTH (cv)))
412 { 725 {
413 EXTEND (SP, CvDEPTH(cv)*2); 726 EXTEND (SP, 3);
414
415 while (--CvDEPTH(cv))
416 {
417 /* this tells the restore code to increment CvDEPTH */
418 PUSHs (Nullsv);
419 PUSHs ((SV *)cv);
420 }
421
422 PUSHs ((SV *)CvPADLIST(cv)); 727 PUSHs ((SV *)CvPADLIST (cv));
728 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
423 PUSHs ((SV *)cv); 729 PUSHs ((SV *)cv);
424 730
731 CvDEPTH (cv) = 0;
425 get_padlist (aTHX_ cv); /* this is a monster */ 732 get_padlist (aTHX_ cv);
426 } 733 }
427 } 734 }
428#ifdef CXt_FORMAT
429 else if (CxTYPE(cx) == CXt_FORMAT)
430 {
431 /* I never used formats, so how should I know how these are implemented? */
432 /* my bold guess is as a simple, plain sub... */
433 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
434 }
435#endif
436 } 735 }
437 736
438 if (top_si->si_type == PERLSI_MAIN) 737 if (expect_true (top_si->si_type == PERLSI_MAIN))
439 break; 738 break;
440 739
441 top_si = top_si->si_prev; 740 top_si = top_si->si_prev;
442 ccstk = top_si->si_cxstack; 741 ccstk = top_si->si_cxstack;
443 cxix = top_si->si_cxix; 742 cxix = top_si->si_cxix;
444 } 743 }
445 744
446 PUTBACK; 745 PUTBACK;
447 } 746 }
448 747
449 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 748 /* allocate some space on the context stack for our purposes */
450 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 749 /* we manually unroll here, as usually 2 slots is enough */
451 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 750 if (SLOT_COUNT >= 1) CXINC;
751 if (SLOT_COUNT >= 2) CXINC;
752 if (SLOT_COUNT >= 3) CXINC;
753 {
754 unsigned int i;
755 for (i = 3; i < SLOT_COUNT; ++i)
756 CXINC;
757 }
758 cxstack_ix -= SLOT_COUNT; /* undo allocation */
452 759
453 c->dowarn = PL_dowarn;
454 c->in_eval = PL_in_eval;
455
456 c->curstackinfo = PL_curstackinfo;
457 c->curstack = PL_curstack;
458 c->mainstack = PL_mainstack; 760 c->mainstack = PL_mainstack;
459 c->stack_sp = PL_stack_sp; 761
460 c->op = PL_op; 762 {
461 c->curpad = PL_curpad; 763 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
462 c->comppad = PL_comppad; 764
463 c->compcv = PL_compcv; 765 slot->defav = GvAV (PL_defgv);
464 c->stack_base = PL_stack_base; 766 slot->defsv = DEFSV;
465 c->stack_max = PL_stack_max; 767 slot->errsv = ERRSV;
466 c->tmps_stack = PL_tmps_stack; 768 slot->irsgv = GvSV (irsgv);
467 c->tmps_floor = PL_tmps_floor; 769 slot->hinthv = GvHV (PL_hintgv);
468 c->tmps_ix = PL_tmps_ix; 770
469 c->tmps_max = PL_tmps_max; 771 #define VAR(name,type) slot->name = PL_ ## name;
470 c->markstack = PL_markstack; 772 # include "state.h"
471 c->markstack_ptr = PL_markstack_ptr; 773 #undef VAR
472 c->markstack_max = PL_markstack_max; 774 }
473 c->scopestack = PL_scopestack;
474 c->scopestack_ix = PL_scopestack_ix;
475 c->scopestack_max = PL_scopestack_max;
476 c->savestack = PL_savestack;
477 c->savestack_ix = PL_savestack_ix;
478 c->savestack_max = PL_savestack_max;
479#if PERL_VERSION < 9
480 c->retstack = PL_retstack;
481 c->retstack_ix = PL_retstack_ix;
482 c->retstack_max = PL_retstack_max;
483#endif
484 c->curpm = PL_curpm;
485 c->curcop = PL_curcop;
486 c->top_env = PL_top_env;
487} 775}
488 776
489/* 777/*
490 * allocate various perl stacks. This is an exact copy 778 * allocate various perl stacks. This is almost an exact copy
491 * of perl.c:init_stacks, except that it uses less memory 779 * of perl.c:init_stacks, except that it uses less memory
492 * on the (sometimes correct) assumption that coroutines do 780 * on the (sometimes correct) assumption that coroutines do
493 * not usually need a lot of stackspace. 781 * not usually need a lot of stackspace.
494 */ 782 */
495STATIC void 783#if CORO_PREFER_PERL_FUNCTIONS
784# define coro_init_stacks(thx) init_stacks ()
785#else
786static void
496coro_init_stacks (pTHX) 787coro_init_stacks (pTHX)
497{ 788{
498 LOCK; 789 PL_curstackinfo = new_stackinfo(32, 8);
499
500 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
501 PL_curstackinfo->si_type = PERLSI_MAIN; 790 PL_curstackinfo->si_type = PERLSI_MAIN;
502 PL_curstack = PL_curstackinfo->si_stack; 791 PL_curstack = PL_curstackinfo->si_stack;
503 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 792 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
504 793
505 PL_stack_base = AvARRAY(PL_curstack); 794 PL_stack_base = AvARRAY(PL_curstack);
506 PL_stack_sp = PL_stack_base; 795 PL_stack_sp = PL_stack_base;
507 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 796 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
508 797
509 New(50,PL_tmps_stack,96,SV*); 798 New(50,PL_tmps_stack,32,SV*);
510 PL_tmps_floor = -1; 799 PL_tmps_floor = -1;
511 PL_tmps_ix = -1; 800 PL_tmps_ix = -1;
512 PL_tmps_max = 96; 801 PL_tmps_max = 32;
513 802
514 New(54,PL_markstack,16,I32); 803 New(54,PL_markstack,16,I32);
515 PL_markstack_ptr = PL_markstack; 804 PL_markstack_ptr = PL_markstack;
516 PL_markstack_max = PL_markstack + 16; 805 PL_markstack_max = PL_markstack + 16;
517 806
518#ifdef SET_MARK_OFFSET 807#ifdef SET_MARK_OFFSET
519 SET_MARK_OFFSET; 808 SET_MARK_OFFSET;
520#endif 809#endif
521 810
522 New(54,PL_scopestack,16,I32); 811 New(54,PL_scopestack,8,I32);
523 PL_scopestack_ix = 0; 812 PL_scopestack_ix = 0;
524 PL_scopestack_max = 16; 813 PL_scopestack_max = 8;
525 814
526 New(54,PL_savestack,96,ANY); 815 New(54,PL_savestack,24,ANY);
527 PL_savestack_ix = 0; 816 PL_savestack_ix = 0;
528 PL_savestack_max = 96; 817 PL_savestack_max = 24;
529 818
530#if PERL_VERSION < 9 819#if !PERL_VERSION_ATLEAST (5,10,0)
531 New(54,PL_retstack,8,OP*); 820 New(54,PL_retstack,4,OP*);
532 PL_retstack_ix = 0; 821 PL_retstack_ix = 0;
533 PL_retstack_max = 8; 822 PL_retstack_max = 4;
534#endif 823#endif
535
536 UNLOCK;
537} 824}
825#endif
538 826
539/* 827/*
540 * destroy the stacks, the callchain etc... 828 * destroy the stacks, the callchain etc...
541 */ 829 */
542STATIC void 830static void
543destroy_stacks(pTHX) 831coro_destruct_stacks (pTHX)
544{ 832{
545 if (!IN_DESTRUCT)
546 {
547 /* is this ugly, I ask? */
548 LEAVE_SCOPE (0);
549
550 /* sure it is, but more important: is it correct?? :/ */
551 FREETMPS;
552
553 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
554 }
555
556 while (PL_curstackinfo->si_next) 833 while (PL_curstackinfo->si_next)
557 PL_curstackinfo = PL_curstackinfo->si_next; 834 PL_curstackinfo = PL_curstackinfo->si_next;
558 835
559 while (PL_curstackinfo) 836 while (PL_curstackinfo)
560 { 837 {
561 PERL_SI *p = PL_curstackinfo->si_prev; 838 PERL_SI *p = PL_curstackinfo->si_prev;
562 839
563 { /*D*//*remove*/
564 dSP;
565 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
566 PUTBACK; /* possibly superfluous */
567 }
568
569 if (!IN_DESTRUCT) 840 if (!IN_DESTRUCT)
570 {
571 dounwind (-1);/*D*//*remove*/
572 SvREFCNT_dec (PL_curstackinfo->si_stack); 841 SvREFCNT_dec (PL_curstackinfo->si_stack);
573 }
574 842
575 Safefree (PL_curstackinfo->si_cxstack); 843 Safefree (PL_curstackinfo->si_cxstack);
576 Safefree (PL_curstackinfo); 844 Safefree (PL_curstackinfo);
577 PL_curstackinfo = p; 845 PL_curstackinfo = p;
578 } 846 }
579 847
580 Safefree (PL_tmps_stack); 848 Safefree (PL_tmps_stack);
581 Safefree (PL_markstack); 849 Safefree (PL_markstack);
582 Safefree (PL_scopestack); 850 Safefree (PL_scopestack);
583 Safefree (PL_savestack); 851 Safefree (PL_savestack);
584#if PERL_VERSION < 9 852#if !PERL_VERSION_ATLEAST (5,10,0)
585 Safefree (PL_retstack); 853 Safefree (PL_retstack);
586#endif 854#endif
587} 855}
588 856
589static void 857#define CORO_RSS \
590allocate_stack (Coro__State ctx, int alloc) 858 rss += sizeof (SYM (curstackinfo)); \
591{ 859 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
592 coro_stack *stack; 860 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
861 rss += SYM (tmps_max) * sizeof (SV *); \
862 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
863 rss += SYM (scopestack_max) * sizeof (I32); \
864 rss += SYM (savestack_max) * sizeof (ANY);
593 865
594 New (0, stack, 1, coro_stack); 866static size_t
867coro_rss (pTHX_ struct coro *coro)
868{
869 size_t rss = sizeof (*coro);
595 870
596 stack->refcnt = 1; 871 if (coro->mainstack)
597 stack->usecnt = 1; 872 {
598 stack->gencnt = ctx->gencnt = 0; 873 if (coro->flags & CF_RUNNING)
599 874 {
600 if (alloc) 875 #define SYM(sym) PL_ ## sym
876 CORO_RSS;
877 #undef SYM
878 }
879 else
880 {
881 #define SYM(sym) coro->slot->sym
882 CORO_RSS;
883 #undef SYM
884 }
601 { 885 }
602#if HAVE_MMAP 886
603 stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */ 887 return rss;
604 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 888}
605 if (stack->sptr == (void *)-1) 889
890/** coroutine stack handling ************************************************/
891
892static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
893static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
894static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
895
896/* apparently < 5.8.8 */
897#ifndef MgPV_nolen_const
898#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
899 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
900 (const char*)(mg)->mg_ptr)
606#endif 901#endif
902
903/*
904 * This overrides the default magic get method of %SIG elements.
905 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
906 * and instead of trying to save and restore the hash elements, we just provide
907 * readback here.
908 */
909static int
910coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
911{
912 const char *s = MgPV_nolen_const (mg);
913
914 if (*s == '_')
915 {
916 SV **svp = 0;
917
918 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
919 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
920
921 if (svp)
607 { 922 {
608 /*FIXME*//*D*//* reasonable stack size! */ 923 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
609 stack->ssize = - (STACKSIZE * sizeof (long)); 924 return 0;
610 New (0, stack->sptr, STACKSIZE, long);
611 } 925 }
612 } 926 }
613 else
614 stack->sptr = 0;
615 927
616 ctx->stack = stack; 928 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
617} 929}
618 930
619static void 931static int
620deallocate_stack (Coro__State ctx) 932coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
621{ 933{
622 coro_stack *stack = ctx->stack; 934 const char *s = MgPV_nolen_const (mg);
623 935
624 ctx->stack = 0; 936 if (*s == '_')
625
626 if (stack)
627 { 937 {
628 if (!--stack->refcnt) 938 SV **svp = 0;
939
940 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
941 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
942
943 if (svp)
629 { 944 {
630#ifdef HAVE_MMAP 945 SV *old = *svp;
631 if (stack->ssize > 0 && stack->sptr) 946 *svp = 0;
632 munmap (stack->sptr, stack->ssize); 947 SvREFCNT_dec (old);
633 else 948 return 0;
634#endif
635 Safefree (stack->sptr);
636
637 Safefree (stack);
638 } 949 }
639 else if (ctx->gencnt == stack->gencnt) 950 }
640 --stack->usecnt; 951
952 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
953}
954
955static int
956coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
957{
958 const char *s = MgPV_nolen_const (mg);
959
960 if (*s == '_')
641 } 961 {
642} 962 SV **svp = 0;
643 963
964 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
965 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
966
967 if (svp)
968 {
969 SV *old = *svp;
970 *svp = SvOK (sv) ? newSVsv (sv) : 0;
971 SvREFCNT_dec (old);
972 return 0;
973 }
974 }
975
976 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
977}
978
979static void
980prepare_nop (pTHX_ struct coro_transfer_args *ta)
981{
982 /* kind of mega-hacky, but works */
983 ta->next = ta->prev = (struct coro *)ta;
984}
985
644static void 986static int
645setup_coro (void *arg) 987slf_check_nop (pTHX_ struct CoroSLF *frame)
988{
989 return 0;
990}
991
992static int
993slf_check_repeat (pTHX_ struct CoroSLF *frame)
994{
995 return 1;
996}
997
998static UNOP init_perl_op;
999
1000static void NOINLINE /* noinline to keep it out of the transfer fast path */
1001init_perl (pTHX_ struct coro *coro)
646{ 1002{
647 /* 1003 /*
648 * emulate part of the perl startup here. 1004 * emulate part of the perl startup here.
649 */ 1005 */
1006 coro_init_stacks (aTHX);
1007
1008 PL_runops = RUNOPS_DEFAULT;
1009 PL_curcop = &PL_compiling;
1010 PL_in_eval = EVAL_NULL;
1011 PL_comppad = 0;
1012 PL_comppad_name = 0;
1013 PL_comppad_name_fill = 0;
1014 PL_comppad_name_floor = 0;
1015 PL_curpm = 0;
1016 PL_curpad = 0;
1017 PL_localizing = 0;
1018 PL_dirty = 0;
1019 PL_restartop = 0;
1020#if PERL_VERSION_ATLEAST (5,10,0)
1021 PL_parser = 0;
1022#endif
1023 PL_hints = 0;
1024
1025 /* recreate the die/warn hooks */
1026 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
1027 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
1028
1029 GvSV (PL_defgv) = newSV (0);
1030 GvAV (PL_defgv) = coro->args; coro->args = 0;
1031 GvSV (PL_errgv) = newSV (0);
1032 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1033 GvHV (PL_hintgv) = 0;
1034 PL_rs = newSVsv (GvSV (irsgv));
1035 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1036
1037 {
1038 dSP;
1039 UNOP myop;
1040
1041 Zero (&myop, 1, UNOP);
1042 myop.op_next = Nullop;
1043 myop.op_type = OP_ENTERSUB;
1044 myop.op_flags = OPf_WANT_VOID;
1045
1046 PUSHMARK (SP);
1047 PUSHs ((SV *)coro->startcv);
1048 PUTBACK;
1049 PL_op = (OP *)&myop;
1050 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1051 }
1052
1053 /* this newly created coroutine might be run on an existing cctx which most
1054 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1055 */
1056 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1057 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1058
1059 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1060 init_perl_op.op_next = PL_op;
1061 init_perl_op.op_type = OP_ENTERSUB;
1062 init_perl_op.op_ppaddr = pp_slf;
1063 /* no flags etc. required, as an init function won't be called */
1064
1065 PL_op = (OP *)&init_perl_op;
1066
1067 /* copy throw, in case it was set before init_perl */
1068 CORO_THROW = coro->except;
1069
1070 SWAP_SVS (coro);
1071
1072 if (expect_false (enable_times))
1073 {
1074 coro_times_update ();
1075 coro_times_sub (coro);
1076 }
1077}
1078
1079static void
1080coro_unwind_stacks (pTHX)
1081{
1082 if (!IN_DESTRUCT)
1083 {
1084 /* restore all saved variables and stuff */
1085 LEAVE_SCOPE (0);
1086 assert (PL_tmps_floor == -1);
1087
1088 /* free all temporaries */
1089 FREETMPS;
1090 assert (PL_tmps_ix == -1);
1091
1092 /* unwind all extra stacks */
1093 POPSTACK_TO (PL_mainstack);
1094
1095 /* unwind main stack */
1096 dounwind (-1);
1097 }
1098}
1099
1100static void
1101destroy_perl (pTHX_ struct coro *coro)
1102{
1103 SV *svf [9];
1104
1105 {
1106 struct coro *current = SvSTATE_current;
1107
1108 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1109
1110 save_perl (aTHX_ current);
1111 load_perl (aTHX_ coro);
1112
1113 coro_unwind_stacks (aTHX);
1114 coro_destruct_stacks (aTHX);
1115
1116 /* restore swapped sv's */
1117 SWAP_SVS (coro);
1118
1119 // now save some sv's to be free'd later
1120 svf [0] = GvSV (PL_defgv);
1121 svf [1] = (SV *)GvAV (PL_defgv);
1122 svf [2] = GvSV (PL_errgv);
1123 svf [3] = (SV *)PL_defoutgv;
1124 svf [4] = PL_rs;
1125 svf [5] = GvSV (irsgv);
1126 svf [6] = (SV *)GvHV (PL_hintgv);
1127 svf [7] = PL_diehook;
1128 svf [8] = PL_warnhook;
1129 assert (9 == sizeof (svf) / sizeof (*svf));
1130
1131 load_perl (aTHX_ current);
1132 }
1133
1134 {
1135 unsigned int i;
1136
1137 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1138 SvREFCNT_dec (svf [i]);
1139
1140 SvREFCNT_dec (coro->saved_deffh);
1141 SvREFCNT_dec (coro->rouse_cb);
1142 SvREFCNT_dec (coro->invoke_cb);
1143 SvREFCNT_dec (coro->invoke_av);
1144 }
1145}
1146
1147INLINE void
1148free_coro_mortal (pTHX)
1149{
1150 if (expect_true (coro_mortal))
1151 {
1152 SvREFCNT_dec (coro_mortal);
1153 coro_mortal = 0;
1154 }
1155}
1156
1157static int
1158runops_trace (pTHX)
1159{
1160 COP *oldcop = 0;
1161 int oldcxix = -2;
1162
1163 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1164 {
1165 PERL_ASYNC_CHECK ();
1166
1167 if (cctx_current->flags & CC_TRACE_ALL)
1168 {
1169 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1170 {
1171 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1172 SV **bot, **top;
1173 AV *av = newAV (); /* return values */
1174 SV **cb;
1175 dSP;
1176
1177 GV *gv = CvGV (cx->blk_sub.cv);
1178 SV *fullname = sv_2mortal (newSV (0));
1179 if (isGV (gv))
1180 gv_efullname3 (fullname, gv, 0);
1181
1182 bot = PL_stack_base + cx->blk_oldsp + 1;
1183 top = cx->blk_gimme == G_ARRAY ? SP + 1
1184 : cx->blk_gimme == G_SCALAR ? bot + 1
1185 : bot;
1186
1187 av_extend (av, top - bot);
1188 while (bot < top)
1189 av_push (av, SvREFCNT_inc_NN (*bot++));
1190
1191 PL_runops = RUNOPS_DEFAULT;
1192 ENTER;
1193 SAVETMPS;
1194 EXTEND (SP, 3);
1195 PUSHMARK (SP);
1196 PUSHs (&PL_sv_no);
1197 PUSHs (fullname);
1198 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1199 PUTBACK;
1200 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1201 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1202 SPAGAIN;
1203 FREETMPS;
1204 LEAVE;
1205 PL_runops = runops_trace;
1206 }
1207
1208 if (oldcop != PL_curcop)
1209 {
1210 oldcop = PL_curcop;
1211
1212 if (PL_curcop != &PL_compiling)
1213 {
1214 SV **cb;
1215
1216 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1217 {
1218 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1219
1220 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1221 {
1222 dSP;
1223 GV *gv = CvGV (cx->blk_sub.cv);
1224 SV *fullname = sv_2mortal (newSV (0));
1225
1226 if (isGV (gv))
1227 gv_efullname3 (fullname, gv, 0);
1228
1229 PL_runops = RUNOPS_DEFAULT;
1230 ENTER;
1231 SAVETMPS;
1232 EXTEND (SP, 3);
1233 PUSHMARK (SP);
1234 PUSHs (&PL_sv_yes);
1235 PUSHs (fullname);
1236 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1237 PUTBACK;
1238 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1239 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1240 SPAGAIN;
1241 FREETMPS;
1242 LEAVE;
1243 PL_runops = runops_trace;
1244 }
1245
1246 oldcxix = cxstack_ix;
1247 }
1248
1249 if (cctx_current->flags & CC_TRACE_LINE)
1250 {
1251 dSP;
1252
1253 PL_runops = RUNOPS_DEFAULT;
1254 ENTER;
1255 SAVETMPS;
1256 EXTEND (SP, 3);
1257 PL_runops = RUNOPS_DEFAULT;
1258 PUSHMARK (SP);
1259 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1260 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1261 PUTBACK;
1262 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1263 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1264 SPAGAIN;
1265 FREETMPS;
1266 LEAVE;
1267 PL_runops = runops_trace;
1268 }
1269 }
1270 }
1271 }
1272 }
1273
1274 TAINT_NOT;
1275 return 0;
1276}
1277
1278static struct CoroSLF cctx_ssl_frame;
1279
1280static void
1281slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1282{
1283 ta->prev = 0;
1284}
1285
1286static int
1287slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1288{
1289 *frame = cctx_ssl_frame;
1290
1291 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1292}
1293
1294/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1295static void NOINLINE
1296cctx_prepare (pTHX)
1297{
1298 PL_top_env = &PL_start_env;
1299
1300 if (cctx_current->flags & CC_TRACE)
1301 PL_runops = runops_trace;
1302
1303 /* we already must be executing an SLF op, there is no other valid way
1304 * that can lead to creation of a new cctx */
1305 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1306 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1307
1308 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1309 cctx_ssl_frame = slf_frame;
1310
1311 slf_frame.prepare = slf_prepare_set_stacklevel;
1312 slf_frame.check = slf_check_set_stacklevel;
1313}
1314
1315/* the tail of transfer: execute stuff we can only do after a transfer */
1316INLINE void
1317transfer_tail (pTHX)
1318{
1319 free_coro_mortal (aTHX);
1320}
1321
1322/*
1323 * this is a _very_ stripped down perl interpreter ;)
1324 */
1325static void
1326cctx_run (void *arg)
1327{
1328#ifdef USE_ITHREADS
1329# if CORO_PTHREAD
1330 PERL_SET_CONTEXT (coro_thx);
1331# endif
1332#endif
1333 {
1334 dTHX;
1335
1336 /* normally we would need to skip the entersub here */
1337 /* not doing so will re-execute it, which is exactly what we want */
1338 /* PL_nop = PL_nop->op_next */
1339
1340 /* inject a fake subroutine call to cctx_init */
1341 cctx_prepare (aTHX);
1342
1343 /* cctx_run is the alternative tail of transfer() */
1344 transfer_tail (aTHX);
1345
1346 /* somebody or something will hit me for both perl_run and PL_restartop */
1347 PL_restartop = PL_op;
1348 perl_run (PL_curinterp);
1349 /*
1350 * Unfortunately, there is no way to get at the return values of the
1351 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1352 * runtime errors here, as this is just a random interpreter, not a thread.
1353 */
1354
1355 /*
1356 * If perl-run returns we assume exit() was being called or the coro
1357 * fell off the end, which seems to be the only valid (non-bug)
1358 * reason for perl_run to return. We try to exit by jumping to the
1359 * bootstrap-time "top" top_env, as we cannot restore the "main"
1360 * coroutine as Coro has no such concept.
1361 * This actually isn't valid with the pthread backend, but OSes requiring
1362 * that backend are too broken to do it in a standards-compliant way.
1363 */
1364 PL_top_env = main_top_env;
1365 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1366 }
1367}
1368
1369static coro_cctx *
1370cctx_new ()
1371{
1372 coro_cctx *cctx;
1373
1374 ++cctx_count;
1375 New (0, cctx, 1, coro_cctx);
1376
1377 cctx->gen = cctx_gen;
1378 cctx->flags = 0;
1379 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1380
1381 return cctx;
1382}
1383
1384/* create a new cctx only suitable as source */
1385static coro_cctx *
1386cctx_new_empty ()
1387{
1388 coro_cctx *cctx = cctx_new ();
1389
1390 cctx->sptr = 0;
1391 coro_create (&cctx->cctx, 0, 0, 0, 0);
1392
1393 return cctx;
1394}
1395
1396/* create a new cctx suitable as destination/running a perl interpreter */
1397static coro_cctx *
1398cctx_new_run ()
1399{
1400 coro_cctx *cctx = cctx_new ();
1401 void *stack_start;
1402 size_t stack_size;
1403
1404#if HAVE_MMAP
1405 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1406 /* mmap supposedly does allocate-on-write for us */
1407 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1408
1409 if (cctx->sptr != (void *)-1)
1410 {
1411 #if CORO_STACKGUARD
1412 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1413 #endif
1414 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1415 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1416 cctx->flags |= CC_MAPPED;
1417 }
1418 else
1419#endif
1420 {
1421 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1422 New (0, cctx->sptr, cctx_stacksize, long);
1423
1424 if (!cctx->sptr)
1425 {
1426 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1427 _exit (EXIT_FAILURE);
1428 }
1429
1430 stack_start = cctx->sptr;
1431 stack_size = cctx->ssize;
1432 }
1433
1434 #if CORO_USE_VALGRIND
1435 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1436 #endif
1437
1438 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1439
1440 return cctx;
1441}
1442
1443static void
1444cctx_destroy (coro_cctx *cctx)
1445{
1446 if (!cctx)
1447 return;
1448
1449 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1450
1451 --cctx_count;
1452 coro_destroy (&cctx->cctx);
1453
1454 /* coro_transfer creates new, empty cctx's */
1455 if (cctx->sptr)
1456 {
1457 #if CORO_USE_VALGRIND
1458 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1459 #endif
1460
1461#if HAVE_MMAP
1462 if (cctx->flags & CC_MAPPED)
1463 munmap (cctx->sptr, cctx->ssize);
1464 else
1465#endif
1466 Safefree (cctx->sptr);
1467 }
1468
1469 Safefree (cctx);
1470}
1471
1472/* wether this cctx should be destructed */
1473#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1474
1475static coro_cctx *
1476cctx_get (pTHX)
1477{
1478 while (expect_true (cctx_first))
1479 {
1480 coro_cctx *cctx = cctx_first;
1481 cctx_first = cctx->next;
1482 --cctx_idle;
1483
1484 if (expect_true (!CCTX_EXPIRED (cctx)))
1485 return cctx;
1486
1487 cctx_destroy (cctx);
1488 }
1489
1490 return cctx_new_run ();
1491}
1492
1493static void
1494cctx_put (coro_cctx *cctx)
1495{
1496 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1497
1498 /* free another cctx if overlimit */
1499 if (expect_false (cctx_idle >= cctx_max_idle))
1500 {
1501 coro_cctx *first = cctx_first;
1502 cctx_first = first->next;
1503 --cctx_idle;
1504
1505 cctx_destroy (first);
1506 }
1507
1508 ++cctx_idle;
1509 cctx->next = cctx_first;
1510 cctx_first = cctx;
1511}
1512
1513/** coroutine switching *****************************************************/
1514
1515static void
1516transfer_check (pTHX_ struct coro *prev, struct coro *next)
1517{
1518 /* TODO: throwing up here is considered harmful */
1519
1520 if (expect_true (prev != next))
1521 {
1522 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1523 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1524
1525 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1526 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1527
1528#if !PERL_VERSION_ATLEAST (5,10,0)
1529 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1530 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1531#endif
1532 }
1533}
1534
1535/* always use the TRANSFER macro */
1536static void NOINLINE /* noinline so we have a fixed stackframe */
1537transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1538{
1539 dSTACKLEVEL;
1540
1541 /* sometimes transfer is only called to set idle_sp */
1542 if (expect_false (!prev))
1543 {
1544 cctx_current->idle_sp = STACKLEVEL;
1545 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1546 }
1547 else if (expect_true (prev != next))
1548 {
1549 coro_cctx *cctx_prev;
1550
1551 if (expect_false (prev->flags & CF_NEW))
1552 {
1553 /* create a new empty/source context */
1554 prev->flags &= ~CF_NEW;
1555 prev->flags |= CF_RUNNING;
1556 }
1557
1558 prev->flags &= ~CF_RUNNING;
1559 next->flags |= CF_RUNNING;
1560
1561 /* first get rid of the old state */
1562 save_perl (aTHX_ prev);
1563
1564 if (expect_false (next->flags & CF_NEW))
1565 {
1566 /* need to start coroutine */
1567 next->flags &= ~CF_NEW;
1568 /* setup coroutine call */
1569 init_perl (aTHX_ next);
1570 }
1571 else
1572 load_perl (aTHX_ next);
1573
1574 /* possibly untie and reuse the cctx */
1575 if (expect_true (
1576 cctx_current->idle_sp == STACKLEVEL
1577 && !(cctx_current->flags & CC_TRACE)
1578 && !force_cctx
1579 ))
1580 {
1581 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1582 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1583
1584 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1585 /* without this the next cctx_get might destroy the running cctx while still in use */
1586 if (expect_false (CCTX_EXPIRED (cctx_current)))
1587 if (expect_true (!next->cctx))
1588 next->cctx = cctx_get (aTHX);
1589
1590 cctx_put (cctx_current);
1591 }
1592 else
1593 prev->cctx = cctx_current;
1594
1595 ++next->usecount;
1596
1597 cctx_prev = cctx_current;
1598 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1599
1600 next->cctx = 0;
1601
1602 if (expect_false (cctx_prev != cctx_current))
1603 {
1604 cctx_prev->top_env = PL_top_env;
1605 PL_top_env = cctx_current->top_env;
1606 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1607 }
1608
1609 transfer_tail (aTHX);
1610 }
1611}
1612
1613#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1614#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1615
1616/** high level stuff ********************************************************/
1617
1618static int
1619coro_state_destroy (pTHX_ struct coro *coro)
1620{
1621 if (coro->flags & CF_DESTROYED)
1622 return 0;
1623
1624 if (coro->on_destroy && !PL_dirty)
1625 coro->on_destroy (aTHX_ coro);
1626
1627 coro->flags |= CF_DESTROYED;
1628
1629 if (coro->flags & CF_READY)
1630 {
1631 /* reduce nready, as destroying a ready coro effectively unreadies it */
1632 /* alternative: look through all ready queues and remove the coro */
1633 --coro_nready;
1634 }
1635 else
1636 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1637
1638 if (coro->mainstack
1639 && coro->mainstack != main_mainstack
1640 && coro->slot
1641 && !PL_dirty)
1642 destroy_perl (aTHX_ coro);
1643
1644 if (coro->next) coro->next->prev = coro->prev;
1645 if (coro->prev) coro->prev->next = coro->next;
1646 if (coro == coro_first) coro_first = coro->next;
1647
1648 cctx_destroy (coro->cctx);
1649 SvREFCNT_dec (coro->startcv);
1650 SvREFCNT_dec (coro->args);
1651 SvREFCNT_dec (coro->swap_sv);
1652 SvREFCNT_dec (CORO_THROW);
1653
1654 return 1;
1655}
1656
1657static int
1658coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1659{
1660 struct coro *coro = (struct coro *)mg->mg_ptr;
1661 mg->mg_ptr = 0;
1662
1663 coro->hv = 0;
1664
1665 if (--coro->refcnt < 0)
1666 {
1667 coro_state_destroy (aTHX_ coro);
1668 Safefree (coro);
1669 }
1670
1671 return 0;
1672}
1673
1674static int
1675coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1676{
1677 struct coro *coro = (struct coro *)mg->mg_ptr;
1678
1679 ++coro->refcnt;
1680
1681 return 0;
1682}
1683
1684static MGVTBL coro_state_vtbl = {
1685 0, 0, 0, 0,
1686 coro_state_free,
1687 0,
1688#ifdef MGf_DUP
1689 coro_state_dup,
1690#else
1691# define MGf_DUP 0
1692#endif
1693};
1694
1695static void
1696prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1697{
1698 ta->prev = SvSTATE (prev_sv);
1699 ta->next = SvSTATE (next_sv);
1700 TRANSFER_CHECK (*ta);
1701}
1702
1703static void
1704api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1705{
1706 struct coro_transfer_args ta;
1707
1708 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1709 TRANSFER (ta, 1);
1710}
1711
1712/** Coro ********************************************************************/
1713
1714INLINE void
1715coro_enq (pTHX_ struct coro *coro)
1716{
1717 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1718
1719 SvREFCNT_inc_NN (coro->hv);
1720
1721 coro->next_ready = 0;
1722 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1723 ready [1] = coro;
1724}
1725
1726INLINE struct coro *
1727coro_deq (pTHX)
1728{
1729 int prio;
1730
1731 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1732 {
1733 struct coro **ready = coro_ready [prio];
1734
1735 if (ready [0])
1736 {
1737 struct coro *coro = ready [0];
1738 ready [0] = coro->next_ready;
1739 return coro;
1740 }
1741 }
1742
1743 return 0;
1744}
1745
1746static void
1747invoke_sv_ready_hook_helper (void)
1748{
650 dTHX; 1749 dTHX;
651 dSP; 1750 dSP;
652 Coro__State ctx = (Coro__State)arg;
653 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
654 1751
655 coro_init_stacks (aTHX); 1752 ENTER;
656 /*PL_curcop = 0;*/ 1753 SAVETMPS;
657 /*PL_in_eval = PL_in_eval;*/ /* inherit */
658 SvREFCNT_dec (GvAV (PL_defgv));
659 GvAV (PL_defgv) = ctx->args; ctx->args = 0;
660 1754
661 SPAGAIN;
662
663 if (ctx->stack)
664 {
665 ctx->cursp = 0;
666
667 PUSHMARK(SP); 1755 PUSHMARK (SP);
668 PUTBACK; 1756 PUTBACK;
669 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 1757 call_sv (coro_readyhook, G_VOID | G_DISCARD);
670 1758
671 if (SvTRUE (ERRSV)) 1759 FREETMPS;
672 croak (NULL); 1760 LEAVE;
673 else 1761}
674 croak ("FATAL: CCTXT coroutine returned!"); 1762
1763static int
1764api_ready (pTHX_ SV *coro_sv)
1765{
1766 struct coro *coro = SvSTATE (coro_sv);
1767
1768 if (coro->flags & CF_READY)
1769 return 0;
1770
1771 coro->flags |= CF_READY;
1772
1773 coro_enq (aTHX_ coro);
1774
1775 if (!coro_nready++)
1776 if (coroapi.readyhook)
1777 coroapi.readyhook ();
1778
1779 return 1;
1780}
1781
1782static int
1783api_is_ready (pTHX_ SV *coro_sv)
1784{
1785 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1786}
1787
1788/* expects to own a reference to next->hv */
1789INLINE void
1790prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1791{
1792 SV *prev_sv = SvRV (coro_current);
1793
1794 ta->prev = SvSTATE_hv (prev_sv);
1795 ta->next = next;
1796
1797 TRANSFER_CHECK (*ta);
1798
1799 SvRV_set (coro_current, (SV *)next->hv);
1800
1801 free_coro_mortal (aTHX);
1802 coro_mortal = prev_sv;
1803}
1804
1805static void
1806prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1807{
1808 for (;;)
675 } 1809 {
676 else 1810 struct coro *next = coro_deq (aTHX);
677 {
678 UNOP myop;
679 1811
680 PL_op = (OP *)&myop; 1812 if (expect_true (next))
681
682 Zero(&myop, 1, UNOP);
683 myop.op_next = Nullop;
684 myop.op_flags = OPf_WANT_VOID;
685
686 PUSHMARK(SP);
687 XPUSHs (sub_init);
688 /*
689 * the next line is slightly wrong, as PL_op->op_next
690 * is actually being executed so we skip the first op.
691 * that doesn't matter, though, since it is only
692 * pp_nextstate and we never return...
693 * ah yes, and I don't care anyways ;)
694 */
695 PUTBACK;
696 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
697 SPAGAIN;
698
699 ENTER; /* necessary e.g. for dounwind */
700 }
701}
702
703static void
704continue_coro (void *arg)
705{
706 /*
707 * this is a _very_ stripped down perl interpreter ;)
708 */
709 dTHX;
710 Coro__State ctx = (Coro__State)arg;
711 JMPENV coro_start_env;
712
713 PL_top_env = &ctx->start_env;
714
715 ctx->cursp = 0;
716 PL_op = PL_op->op_next;
717 CALLRUNOPS(aTHX);
718
719 abort ();
720}
721
722STATIC void
723transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
724{
725 dSTACKLEVEL;
726
727 if (prev != next)
728 {
729 if (next->mainstack)
730 { 1813 {
731 LOCK; 1814 /* cannot transfer to destroyed coros, skip and look for next */
732 SAVE (prev, flags); 1815 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
733 LOAD (next); 1816 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
734 UNLOCK; 1817 else
735
736 /* mark this state as in-use */
737 next->mainstack = 0;
738 next->tmps_ix = -2;
739
740 /* stacklevel changed? if yes, grab the stack for us! */
741 if (flags & TRANSFER_SAVE_CCTXT)
742 { 1818 {
743 if (!prev->stack) 1819 next->flags &= ~CF_READY;
744 allocate_stack (prev, 0); 1820 --coro_nready;
745 else if (prev->cursp != stacklevel 1821
746 && prev->stack->usecnt > 1) 1822 prepare_schedule_to (aTHX_ ta, next);
747 { 1823 break;
748 prev->gencnt = ++prev->stack->gencnt;
749 prev->stack->usecnt = 1;
750 }
751
752 /* has our stack been invalidated? */
753 if (next->stack && next->stack->gencnt != next->gencnt)
754 {
755 deallocate_stack (next);
756 allocate_stack (next, 1);
757 coro_create (&(next->stack->cctx),
758 continue_coro, (void *)next,
759 next->stack->sptr, labs (next->stack->ssize));
760 }
761
762 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
763 prev->cursp = stacklevel;
764 /* don't add any code here */
765 } 1824 }
766 else
767 next->cursp = stacklevel;
768 } 1825 }
769 else if (next->tmps_ix == -2)
770 croak ("tried to transfer to running coroutine");
771 else 1826 else
772 { 1827 {
773 LOCK; 1828 /* nothing to schedule: call the idle handler */
774 SAVE (prev, -1); /* first get rid of the old state */ 1829 if (SvROK (sv_idle)
775 UNLOCK; 1830 && SvOBJECT (SvRV (sv_idle)))
776
777 if (flags & TRANSFER_SAVE_CCTXT)
778 { 1831 {
779 if (!prev->stack) 1832 if (SvRV (sv_idle) == SvRV (coro_current))
780 allocate_stack (prev, 0); 1833 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
781 1834
782 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK) 1835 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
783 { 1836 api_ready (aTHX_ SvRV (sv_idle));
784 PL_top_env = &next->start_env; 1837 --coro_nready;
785
786 setup_coro (next);
787 next->cursp = stacklevel;
788
789 prev->stack->refcnt++;
790 prev->stack->usecnt++;
791 next->stack = prev->stack;
792 next->gencnt = prev->gencnt;
793 }
794 else
795 {
796 assert (!next->stack);
797 allocate_stack (next, 1);
798 coro_create (&(next->stack->cctx),
799 setup_coro, (void *)next,
800 next->stack->sptr, labs (next->stack->ssize));
801 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
802 prev->cursp = stacklevel;
803 /* don't add any code here */
804 }
805 } 1838 }
806 else 1839 else
807 { 1840 {
808 setup_coro (next); 1841 /* TODO: deprecated, remove, cannot work reliably *//*D*/
809 next->cursp = stacklevel; 1842 dSP;
1843
1844 ENTER;
1845 SAVETMPS;
1846
1847 PUSHMARK (SP);
1848 PUTBACK;
1849 call_sv (sv_idle, G_VOID | G_DISCARD);
1850
1851 FREETMPS;
1852 LEAVE;
810 } 1853 }
811 } 1854 }
812 } 1855 }
1856}
813 1857
814 LOCK; 1858INLINE void
1859prepare_cede (pTHX_ struct coro_transfer_args *ta)
1860{
1861 api_ready (aTHX_ coro_current);
1862 prepare_schedule (aTHX_ ta);
1863}
1864
1865INLINE void
1866prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1867{
1868 SV *prev = SvRV (coro_current);
1869
815 if (coro_mortal) 1870 if (coro_nready)
816 {
817 SvREFCNT_dec (coro_mortal);
818 coro_mortal = 0;
819 } 1871 {
820 UNLOCK; 1872 prepare_schedule (aTHX_ ta);
1873 api_ready (aTHX_ prev);
1874 }
1875 else
1876 prepare_nop (aTHX_ ta);
821} 1877}
822 1878
823#define SV_CORO(sv,func) \ 1879static void
824 do { \ 1880api_schedule (pTHX)
825 if (SvROK (sv)) \ 1881{
826 sv = SvRV (sv); \ 1882 struct coro_transfer_args ta;
827 \
828 if (SvTYPE (sv) == SVt_PVHV) \
829 { \
830 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
831 \
832 if (!he) \
833 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
834 \
835 (sv) = SvRV (HeVAL(he)); \
836 } \
837 \
838 /* must also be changed inside Coro::Cont::yield */ \
839 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
840 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
841 \
842 } while(0)
843 1883
844#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv)) 1884 prepare_schedule (aTHX_ &ta);
1885 TRANSFER (ta, 1);
1886}
845 1887
1888static void
1889api_schedule_to (pTHX_ SV *coro_sv)
1890{
1891 struct coro_transfer_args ta;
1892 struct coro *next = SvSTATE (coro_sv);
1893
1894 SvREFCNT_inc_NN (coro_sv);
1895 prepare_schedule_to (aTHX_ &ta, next);
1896}
1897
846static void 1898static int
847api_transfer(pTHX_ SV *prev, SV *next, int flags) 1899api_cede (pTHX)
848{ 1900{
849 SV_CORO (prev, "Coro::transfer"); 1901 struct coro_transfer_args ta;
850 SV_CORO (next, "Coro::transfer");
851 1902
852 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1903 prepare_cede (aTHX_ &ta);
853}
854 1904
1905 if (expect_true (ta.prev != ta.next))
1906 {
1907 TRANSFER (ta, 1);
1908 return 1;
1909 }
1910 else
1911 return 0;
1912}
1913
1914static int
1915api_cede_notself (pTHX)
1916{
1917 if (coro_nready)
1918 {
1919 struct coro_transfer_args ta;
1920
1921 prepare_cede_notself (aTHX_ &ta);
1922 TRANSFER (ta, 1);
1923 return 1;
1924 }
1925 else
1926 return 0;
1927}
1928
1929static void
1930api_trace (pTHX_ SV *coro_sv, int flags)
1931{
1932 struct coro *coro = SvSTATE (coro_sv);
1933
1934 if (coro->flags & CF_RUNNING)
1935 croak ("cannot enable tracing on a running coroutine, caught");
1936
1937 if (flags & CC_TRACE)
1938 {
1939 if (!coro->cctx)
1940 coro->cctx = cctx_new_run ();
1941 else if (!(coro->cctx->flags & CC_TRACE))
1942 croak ("cannot enable tracing on coroutine with custom stack, caught");
1943
1944 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1945 }
1946 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1947 {
1948 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1949
1950 if (coro->flags & CF_RUNNING)
1951 PL_runops = RUNOPS_DEFAULT;
1952 else
1953 coro->slot->runops = RUNOPS_DEFAULT;
1954 }
1955}
1956
1957static void
1958coro_call_on_destroy (pTHX_ struct coro *coro)
1959{
1960 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1961 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1962
1963 if (on_destroyp)
1964 {
1965 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1966
1967 while (AvFILLp (on_destroy) >= 0)
1968 {
1969 dSP; /* don't disturb outer sp */
1970 SV *cb = av_pop (on_destroy);
1971
1972 PUSHMARK (SP);
1973
1974 if (statusp)
1975 {
1976 int i;
1977 AV *status = (AV *)SvRV (*statusp);
1978 EXTEND (SP, AvFILLp (status) + 1);
1979
1980 for (i = 0; i <= AvFILLp (status); ++i)
1981 PUSHs (AvARRAY (status)[i]);
1982 }
1983
1984 PUTBACK;
1985 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1986 }
1987 }
1988}
1989
1990static void
1991slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1992{
1993 int i;
1994 HV *hv = (HV *)SvRV (coro_current);
1995 AV *av = newAV ();
1996
1997 /* items are actually not so common, so optimise for this case */
1998 if (items)
1999 {
2000 av_extend (av, items - 1);
2001
2002 for (i = 0; i < items; ++i)
2003 av_push (av, SvREFCNT_inc_NN (arg [i]));
2004 }
2005
2006 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
2007
2008 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
2009 api_ready (aTHX_ sv_manager);
2010
2011 frame->prepare = prepare_schedule;
2012 frame->check = slf_check_repeat;
2013
2014 /* as a minor optimisation, we could unwind all stacks here */
2015 /* but that puts extra pressure on pp_slf, and is not worth much */
2016 /*coro_unwind_stacks (aTHX);*/
2017}
2018
855/** Coro ********************************************************************/ 2019/*****************************************************************************/
2020/* async pool handler */
856 2021
857#define PRIO_MAX 3
858#define PRIO_HIGH 1
859#define PRIO_NORMAL 0
860#define PRIO_LOW -1
861#define PRIO_IDLE -3
862#define PRIO_MIN -4
863
864/* for Coro.pm */
865static GV *coro_current, *coro_idle;
866static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
867static int coro_nready;
868
869static void 2022static int
870coro_enq (pTHX_ SV *sv) 2023slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
871{ 2024{
872 SV **xprio; 2025 HV *hv = (HV *)SvRV (coro_current);
873 int prio; 2026 struct coro *coro = (struct coro *)frame->data;
874 2027
2028 if (!coro->invoke_cb)
2029 return 1; /* loop till we have invoke */
2030 else
2031 {
2032 hv_store (hv, "desc", sizeof ("desc") - 1,
2033 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2034
2035 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2036
2037 {
2038 dSP;
2039 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2040 PUTBACK;
2041 }
2042
2043 SvREFCNT_dec (GvAV (PL_defgv));
2044 GvAV (PL_defgv) = coro->invoke_av;
2045 coro->invoke_av = 0;
2046
2047 return 0;
2048 }
2049}
2050
2051static void
2052slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2053{
2054 HV *hv = (HV *)SvRV (coro_current);
2055 struct coro *coro = SvSTATE_hv ((SV *)hv);
2056
2057 if (expect_true (coro->saved_deffh))
2058 {
2059 /* subsequent iteration */
2060 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2061 coro->saved_deffh = 0;
2062
2063 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2064 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2065 {
2066 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
2067 coro->invoke_av = newAV ();
2068
2069 frame->prepare = prepare_nop;
2070 }
2071 else
2072 {
2073 av_clear (GvAV (PL_defgv));
2074 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2075
2076 coro->prio = 0;
2077
2078 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2079 api_trace (aTHX_ coro_current, 0);
2080
2081 frame->prepare = prepare_schedule;
2082 av_push (av_async_pool, SvREFCNT_inc (hv));
2083 }
2084 }
2085 else
2086 {
2087 /* first iteration, simply fall through */
2088 frame->prepare = prepare_nop;
2089 }
2090
2091 frame->check = slf_check_pool_handler;
2092 frame->data = (void *)coro;
2093}
2094
2095/*****************************************************************************/
2096/* rouse callback */
2097
2098#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2099
2100static void
2101coro_rouse_callback (pTHX_ CV *cv)
2102{
2103 dXSARGS;
2104 SV *data = (SV *)S_GENSUB_ARG;
2105
875 if (SvTYPE (sv) != SVt_PVHV) 2106 if (SvTYPE (SvRV (data)) != SVt_PVAV)
876 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 2107 {
2108 /* first call, set args */
2109 SV *coro = SvRV (data);
2110 AV *av = newAV ();
877 2111
878 xprio = hv_fetch ((HV *)sv, "prio", 4, 0); 2112 SvRV_set (data, (SV *)av);
879 prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
880 2113
881 prio = prio > PRIO_MAX ? PRIO_MAX 2114 /* better take a full copy of the arguments */
882 : prio < PRIO_MIN ? PRIO_MIN 2115 while (items--)
883 : prio; 2116 av_store (av, items, newSVsv (ST (items)));
884 2117
885 av_push (coro_ready [prio - PRIO_MIN], sv); 2118 api_ready (aTHX_ coro);
886 coro_nready++; 2119 SvREFCNT_dec (coro);
2120 }
2121
2122 XSRETURN_EMPTY;
2123}
2124
2125static int
2126slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2127{
2128 SV *data = (SV *)frame->data;
2129
2130 if (CORO_THROW)
2131 return 0;
2132
2133 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2134 return 1;
2135
2136 /* now push all results on the stack */
2137 {
2138 dSP;
2139 AV *av = (AV *)SvRV (data);
2140 int i;
2141
2142 EXTEND (SP, AvFILLp (av) + 1);
2143 for (i = 0; i <= AvFILLp (av); ++i)
2144 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2145
2146 /* we have stolen the elements, so set length to zero and free */
2147 AvFILLp (av) = -1;
2148 av_undef (av);
2149
2150 PUTBACK;
2151 }
2152
2153 return 0;
2154}
2155
2156static void
2157slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2158{
2159 SV *cb;
2160
2161 if (items)
2162 cb = arg [0];
2163 else
2164 {
2165 struct coro *coro = SvSTATE_current;
2166
2167 if (!coro->rouse_cb)
2168 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2169
2170 cb = sv_2mortal (coro->rouse_cb);
2171 coro->rouse_cb = 0;
2172 }
2173
2174 if (!SvROK (cb)
2175 || SvTYPE (SvRV (cb)) != SVt_PVCV
2176 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2177 croak ("Coro::rouse_wait called with illegal callback argument,");
2178
2179 {
2180 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2181 SV *data = (SV *)S_GENSUB_ARG;
2182
2183 frame->data = (void *)data;
2184 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2185 frame->check = slf_check_rouse_wait;
2186 }
887} 2187}
888 2188
889static SV * 2189static SV *
890coro_deq (pTHX_ int min_prio) 2190coro_new_rouse_cb (pTHX)
891{ 2191{
892 int prio = PRIO_MAX - PRIO_MIN; 2192 HV *hv = (HV *)SvRV (coro_current);
2193 struct coro *coro = SvSTATE_hv (hv);
2194 SV *data = newRV_inc ((SV *)hv);
2195 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
893 2196
894 min_prio -= PRIO_MIN; 2197 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
895 if (min_prio < 0) 2198 SvREFCNT_dec (data); /* magicext increases the refcount */
896 min_prio = 0;
897 2199
898 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2200 SvREFCNT_dec (coro->rouse_cb);
899 if (av_len (coro_ready[prio]) >= 0) 2201 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2202
2203 return cb;
2204}
2205
2206/*****************************************************************************/
2207/* schedule-like-function opcode (SLF) */
2208
2209static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2210static const CV *slf_cv;
2211static SV **slf_argv;
2212static int slf_argc, slf_arga; /* count, allocated */
2213static I32 slf_ax; /* top of stack, for restore */
2214
2215/* this restores the stack in the case we patched the entersub, to */
2216/* recreate the stack frame as perl will on following calls */
2217/* since entersub cleared the stack */
2218static OP *
2219pp_restore (pTHX)
2220{
2221 int i;
2222 SV **SP = PL_stack_base + slf_ax;
2223
2224 PUSHMARK (SP);
2225
2226 EXTEND (SP, slf_argc + 1);
2227
2228 for (i = 0; i < slf_argc; ++i)
2229 PUSHs (sv_2mortal (slf_argv [i]));
2230
2231 PUSHs ((SV *)CvGV (slf_cv));
2232
2233 RETURNOP (slf_restore.op_first);
2234}
2235
2236static void
2237slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2238{
2239 SV **arg = (SV **)slf_frame.data;
2240
2241 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2242}
2243
2244static void
2245slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2246{
2247 if (items != 2)
2248 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2249
2250 frame->prepare = slf_prepare_transfer;
2251 frame->check = slf_check_nop;
2252 frame->data = (void *)arg; /* let's hope it will stay valid */
2253}
2254
2255static void
2256slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2257{
2258 frame->prepare = prepare_schedule;
2259 frame->check = slf_check_nop;
2260}
2261
2262static void
2263slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2264{
2265 struct coro *next = (struct coro *)slf_frame.data;
2266
2267 SvREFCNT_inc_NN (next->hv);
2268 prepare_schedule_to (aTHX_ ta, next);
2269}
2270
2271static void
2272slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2273{
2274 if (!items)
2275 croak ("Coro::schedule_to expects a coroutine argument, caught");
2276
2277 frame->data = (void *)SvSTATE (arg [0]);
2278 frame->prepare = slf_prepare_schedule_to;
2279 frame->check = slf_check_nop;
2280}
2281
2282static void
2283slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2284{
2285 api_ready (aTHX_ SvRV (coro_current));
2286
2287 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2288}
2289
2290static void
2291slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2292{
2293 frame->prepare = prepare_cede;
2294 frame->check = slf_check_nop;
2295}
2296
2297static void
2298slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2299{
2300 frame->prepare = prepare_cede_notself;
2301 frame->check = slf_check_nop;
2302}
2303
2304/*
2305 * these not obviously related functions are all rolled into one
2306 * function to increase chances that they all will call transfer with the same
2307 * stack offset
2308 * SLF stands for "schedule-like-function".
2309 */
2310static OP *
2311pp_slf (pTHX)
2312{
2313 I32 checkmark; /* mark SP to see how many elements check has pushed */
2314
2315 /* set up the slf frame, unless it has already been set-up */
2316 /* the latter happens when a new coro has been started */
2317 /* or when a new cctx was attached to an existing coroutine */
2318 if (expect_true (!slf_frame.prepare))
2319 {
2320 /* first iteration */
2321 dSP;
2322 SV **arg = PL_stack_base + TOPMARK + 1;
2323 int items = SP - arg; /* args without function object */
2324 SV *gv = *sp;
2325
2326 /* do a quick consistency check on the "function" object, and if it isn't */
2327 /* for us, divert to the real entersub */
2328 if (SvTYPE (gv) != SVt_PVGV
2329 || !GvCV (gv)
2330 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2331 return PL_ppaddr[OP_ENTERSUB](aTHX);
2332
2333 if (!(PL_op->op_flags & OPf_STACKED))
900 { 2334 {
901 coro_nready--; 2335 /* ampersand-form of call, use @_ instead of stack */
902 return av_shift (coro_ready[prio]); 2336 AV *av = GvAV (PL_defgv);
2337 arg = AvARRAY (av);
2338 items = AvFILLp (av) + 1;
903 } 2339 }
2340
2341 /* now call the init function, which needs to set up slf_frame */
2342 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2343 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2344
2345 /* pop args */
2346 SP = PL_stack_base + POPMARK;
2347
2348 PUTBACK;
2349 }
2350
2351 /* now that we have a slf_frame, interpret it! */
2352 /* we use a callback system not to make the code needlessly */
2353 /* complicated, but so we can run multiple perl coros from one cctx */
2354
2355 do
2356 {
2357 struct coro_transfer_args ta;
2358
2359 slf_frame.prepare (aTHX_ &ta);
2360 TRANSFER (ta, 0);
2361
2362 checkmark = PL_stack_sp - PL_stack_base;
2363 }
2364 while (slf_frame.check (aTHX_ &slf_frame));
2365
2366 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2367
2368 /* exception handling */
2369 if (expect_false (CORO_THROW))
2370 {
2371 SV *exception = sv_2mortal (CORO_THROW);
2372
2373 CORO_THROW = 0;
2374 sv_setsv (ERRSV, exception);
2375 croak (0);
2376 }
2377
2378 /* return value handling - mostly like entersub */
2379 /* make sure we put something on the stack in scalar context */
2380 if (GIMME_V == G_SCALAR)
2381 {
2382 dSP;
2383 SV **bot = PL_stack_base + checkmark;
2384
2385 if (sp == bot) /* too few, push undef */
2386 bot [1] = &PL_sv_undef;
2387 else if (sp != bot + 1) /* too many, take last one */
2388 bot [1] = *sp;
2389
2390 SP = bot + 1;
2391
2392 PUTBACK;
2393 }
2394
2395 return NORMAL;
2396}
2397
2398static void
2399api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2400{
2401 int i;
2402 SV **arg = PL_stack_base + ax;
2403 int items = PL_stack_sp - arg + 1;
2404
2405 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2406
2407 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2408 && PL_op->op_ppaddr != pp_slf)
2409 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2410
2411 CvFLAGS (cv) |= CVf_SLF;
2412 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2413 slf_cv = cv;
2414
2415 /* we patch the op, and then re-run the whole call */
2416 /* we have to put the same argument on the stack for this to work */
2417 /* and this will be done by pp_restore */
2418 slf_restore.op_next = (OP *)&slf_restore;
2419 slf_restore.op_type = OP_CUSTOM;
2420 slf_restore.op_ppaddr = pp_restore;
2421 slf_restore.op_first = PL_op;
2422
2423 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2424
2425 if (PL_op->op_flags & OPf_STACKED)
2426 {
2427 if (items > slf_arga)
2428 {
2429 slf_arga = items;
2430 Safefree (slf_argv);
2431 New (0, slf_argv, slf_arga, SV *);
2432 }
2433
2434 slf_argc = items;
2435
2436 for (i = 0; i < items; ++i)
2437 slf_argv [i] = SvREFCNT_inc (arg [i]);
2438 }
2439 else
2440 slf_argc = 0;
2441
2442 PL_op->op_ppaddr = pp_slf;
2443 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2444
2445 PL_op = (OP *)&slf_restore;
2446}
2447
2448/*****************************************************************************/
2449/* dynamic wind */
2450
2451static void
2452on_enterleave_call (pTHX_ SV *cb)
2453{
2454 dSP;
2455
2456 PUSHSTACK;
2457
2458 PUSHMARK (SP);
2459 PUTBACK;
2460 call_sv (cb, G_VOID | G_DISCARD);
2461 SPAGAIN;
2462
2463 POPSTACK;
2464}
2465
2466static SV *
2467coro_avp_pop_and_free (pTHX_ AV **avp)
2468{
2469 AV *av = *avp;
2470 SV *res = av_pop (av);
2471
2472 if (AvFILLp (av) < 0)
2473 {
2474 *avp = 0;
2475 SvREFCNT_dec (av);
2476 }
2477
2478 return res;
2479}
2480
2481static void
2482coro_pop_on_enter (pTHX_ void *coro)
2483{
2484 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2485 SvREFCNT_dec (cb);
2486}
2487
2488static void
2489coro_pop_on_leave (pTHX_ void *coro)
2490{
2491 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2492 on_enterleave_call (aTHX_ sv_2mortal (cb));
2493}
2494
2495/*****************************************************************************/
2496/* PerlIO::cede */
2497
2498typedef struct
2499{
2500 PerlIOBuf base;
2501 NV next, every;
2502} PerlIOCede;
2503
2504static IV
2505PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2506{
2507 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2508
2509 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2510 self->next = nvtime () + self->every;
2511
2512 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2513}
2514
2515static SV *
2516PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2517{
2518 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2519
2520 return newSVnv (self->every);
2521}
2522
2523static IV
2524PerlIOCede_flush (pTHX_ PerlIO *f)
2525{
2526 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2527 double now = nvtime ();
2528
2529 if (now >= self->next)
2530 {
2531 api_cede (aTHX);
2532 self->next = now + self->every;
2533 }
2534
2535 return PerlIOBuf_flush (aTHX_ f);
2536}
2537
2538static PerlIO_funcs PerlIO_cede =
2539{
2540 sizeof(PerlIO_funcs),
2541 "cede",
2542 sizeof(PerlIOCede),
2543 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2544 PerlIOCede_pushed,
2545 PerlIOBuf_popped,
2546 PerlIOBuf_open,
2547 PerlIOBase_binmode,
2548 PerlIOCede_getarg,
2549 PerlIOBase_fileno,
2550 PerlIOBuf_dup,
2551 PerlIOBuf_read,
2552 PerlIOBuf_unread,
2553 PerlIOBuf_write,
2554 PerlIOBuf_seek,
2555 PerlIOBuf_tell,
2556 PerlIOBuf_close,
2557 PerlIOCede_flush,
2558 PerlIOBuf_fill,
2559 PerlIOBase_eof,
2560 PerlIOBase_error,
2561 PerlIOBase_clearerr,
2562 PerlIOBase_setlinebuf,
2563 PerlIOBuf_get_base,
2564 PerlIOBuf_bufsiz,
2565 PerlIOBuf_get_ptr,
2566 PerlIOBuf_get_cnt,
2567 PerlIOBuf_set_ptrcnt,
2568};
2569
2570/*****************************************************************************/
2571/* Coro::Semaphore & Coro::Signal */
2572
2573static SV *
2574coro_waitarray_new (pTHX_ int count)
2575{
2576 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2577 AV *av = newAV ();
2578 SV **ary;
2579
2580 /* unfortunately, building manually saves memory */
2581 Newx (ary, 2, SV *);
2582 AvALLOC (av) = ary;
2583#if PERL_VERSION_ATLEAST (5,10,0)
2584 AvARRAY (av) = ary;
2585#else
2586 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2587 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2588 SvPVX ((SV *)av) = (char *)ary;
2589#endif
2590 AvMAX (av) = 1;
2591 AvFILLp (av) = 0;
2592 ary [0] = newSViv (count);
2593
2594 return newRV_noinc ((SV *)av);
2595}
2596
2597/* semaphore */
2598
2599static void
2600coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2601{
2602 SV *count_sv = AvARRAY (av)[0];
2603 IV count = SvIVX (count_sv);
2604
2605 count += adjust;
2606 SvIVX (count_sv) = count;
2607
2608 /* now wake up as many waiters as are expected to lock */
2609 while (count > 0 && AvFILLp (av) > 0)
2610 {
2611 SV *cb;
2612
2613 /* swap first two elements so we can shift a waiter */
2614 AvARRAY (av)[0] = AvARRAY (av)[1];
2615 AvARRAY (av)[1] = count_sv;
2616 cb = av_shift (av);
2617
2618 if (SvOBJECT (cb))
2619 {
2620 api_ready (aTHX_ cb);
2621 --count;
2622 }
2623 else if (SvTYPE (cb) == SVt_PVCV)
2624 {
2625 dSP;
2626 PUSHMARK (SP);
2627 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2628 PUTBACK;
2629 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2630 }
2631
2632 SvREFCNT_dec (cb);
2633 }
2634}
2635
2636static void
2637coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2638{
2639 /* call $sem->adjust (0) to possibly wake up some other waiters */
2640 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2641}
2642
2643static int
2644slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2645{
2646 AV *av = (AV *)frame->data;
2647 SV *count_sv = AvARRAY (av)[0];
2648
2649 /* if we are about to throw, don't actually acquire the lock, just throw */
2650 if (CORO_THROW)
2651 return 0;
2652 else if (SvIVX (count_sv) > 0)
2653 {
2654 SvSTATE_current->on_destroy = 0;
2655
2656 if (acquire)
2657 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2658 else
2659 coro_semaphore_adjust (aTHX_ av, 0);
2660
2661 return 0;
2662 }
2663 else
2664 {
2665 int i;
2666 /* if we were woken up but can't down, we look through the whole */
2667 /* waiters list and only add us if we aren't in there already */
2668 /* this avoids some degenerate memory usage cases */
2669
2670 for (i = 1; i <= AvFILLp (av); ++i)
2671 if (AvARRAY (av)[i] == SvRV (coro_current))
2672 return 1;
2673
2674 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2675 return 1;
2676 }
2677}
2678
2679static int
2680slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2681{
2682 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2683}
2684
2685static int
2686slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2687{
2688 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2689}
2690
2691static void
2692slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2693{
2694 AV *av = (AV *)SvRV (arg [0]);
2695
2696 if (SvIVX (AvARRAY (av)[0]) > 0)
2697 {
2698 frame->data = (void *)av;
2699 frame->prepare = prepare_nop;
2700 }
2701 else
2702 {
2703 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2704
2705 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2706 frame->prepare = prepare_schedule;
2707
2708 /* to avoid race conditions when a woken-up coro gets terminated */
2709 /* we arrange for a temporary on_destroy that calls adjust (0) */
2710 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2711 }
2712}
2713
2714static void
2715slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2716{
2717 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2718 frame->check = slf_check_semaphore_down;
2719}
2720
2721static void
2722slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2723{
2724 if (items >= 2)
2725 {
2726 /* callback form */
2727 AV *av = (AV *)SvRV (arg [0]);
2728 SV *cb_cv = s_get_cv_croak (arg [1]);
2729
2730 av_push (av, SvREFCNT_inc_NN (cb_cv));
2731
2732 if (SvIVX (AvARRAY (av)[0]) > 0)
2733 coro_semaphore_adjust (aTHX_ av, 0);
2734
2735 frame->prepare = prepare_nop;
2736 frame->check = slf_check_nop;
2737 }
2738 else
2739 {
2740 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2741 frame->check = slf_check_semaphore_wait;
2742 }
2743}
2744
2745/* signal */
2746
2747static void
2748coro_signal_wake (pTHX_ AV *av, int count)
2749{
2750 SvIVX (AvARRAY (av)[0]) = 0;
2751
2752 /* now signal count waiters */
2753 while (count > 0 && AvFILLp (av) > 0)
2754 {
2755 SV *cb;
2756
2757 /* swap first two elements so we can shift a waiter */
2758 cb = AvARRAY (av)[0];
2759 AvARRAY (av)[0] = AvARRAY (av)[1];
2760 AvARRAY (av)[1] = cb;
2761
2762 cb = av_shift (av);
2763
2764 if (SvTYPE (cb) == SVt_PVCV)
2765 {
2766 dSP;
2767 PUSHMARK (SP);
2768 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2769 PUTBACK;
2770 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2771 }
2772 else
2773 {
2774 api_ready (aTHX_ cb);
2775 sv_setiv (cb, 0); /* signal waiter */
2776 }
2777
2778 SvREFCNT_dec (cb);
2779
2780 --count;
2781 }
2782}
2783
2784static int
2785slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2786{
2787 /* if we are about to throw, also stop waiting */
2788 return SvROK ((SV *)frame->data) && !CORO_THROW;
2789}
2790
2791static void
2792slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2793{
2794 AV *av = (AV *)SvRV (arg [0]);
2795
2796 if (items >= 2)
2797 {
2798 SV *cb_cv = s_get_cv_croak (arg [1]);
2799 av_push (av, SvREFCNT_inc_NN (cb_cv));
2800
2801 if (SvIVX (AvARRAY (av)[0]))
2802 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
2803
2804 frame->prepare = prepare_nop;
2805 frame->check = slf_check_nop;
2806 }
2807 else if (SvIVX (AvARRAY (av)[0]))
2808 {
2809 SvIVX (AvARRAY (av)[0]) = 0;
2810 frame->prepare = prepare_nop;
2811 frame->check = slf_check_nop;
2812 }
2813 else
2814 {
2815 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2816
2817 av_push (av, waiter);
2818
2819 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2820 frame->prepare = prepare_schedule;
2821 frame->check = slf_check_signal_wait;
2822 }
2823}
2824
2825/*****************************************************************************/
2826/* Coro::AIO */
2827
2828#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2829
2830/* helper storage struct */
2831struct io_state
2832{
2833 int errorno;
2834 I32 laststype; /* U16 in 5.10.0 */
2835 int laststatval;
2836 Stat_t statcache;
2837};
2838
2839static void
2840coro_aio_callback (pTHX_ CV *cv)
2841{
2842 dXSARGS;
2843 AV *state = (AV *)S_GENSUB_ARG;
2844 SV *coro = av_pop (state);
2845 SV *data_sv = newSV (sizeof (struct io_state));
2846
2847 av_extend (state, items - 1);
2848
2849 sv_upgrade (data_sv, SVt_PV);
2850 SvCUR_set (data_sv, sizeof (struct io_state));
2851 SvPOK_only (data_sv);
2852
2853 {
2854 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2855
2856 data->errorno = errno;
2857 data->laststype = PL_laststype;
2858 data->laststatval = PL_laststatval;
2859 data->statcache = PL_statcache;
2860 }
2861
2862 /* now build the result vector out of all the parameters and the data_sv */
2863 {
2864 int i;
2865
2866 for (i = 0; i < items; ++i)
2867 av_push (state, SvREFCNT_inc_NN (ST (i)));
2868 }
2869
2870 av_push (state, data_sv);
2871
2872 api_ready (aTHX_ coro);
2873 SvREFCNT_dec (coro);
2874 SvREFCNT_dec ((AV *)state);
2875}
2876
2877static int
2878slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2879{
2880 AV *state = (AV *)frame->data;
2881
2882 /* if we are about to throw, return early */
2883 /* this does not cancel the aio request, but at least */
2884 /* it quickly returns */
2885 if (CORO_THROW)
2886 return 0;
2887
2888 /* one element that is an RV? repeat! */
2889 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2890 return 1;
2891
2892 /* restore status */
2893 {
2894 SV *data_sv = av_pop (state);
2895 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2896
2897 errno = data->errorno;
2898 PL_laststype = data->laststype;
2899 PL_laststatval = data->laststatval;
2900 PL_statcache = data->statcache;
2901
2902 SvREFCNT_dec (data_sv);
2903 }
2904
2905 /* push result values */
2906 {
2907 dSP;
2908 int i;
2909
2910 EXTEND (SP, AvFILLp (state) + 1);
2911 for (i = 0; i <= AvFILLp (state); ++i)
2912 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2913
2914 PUTBACK;
2915 }
904 2916
905 return 0; 2917 return 0;
906} 2918}
907 2919
908static void 2920static void
909api_ready (SV *coro) 2921slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
910{ 2922{
911 dTHX; 2923 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
912
913 if (SvROK (coro))
914 coro = SvRV (coro);
915
916 LOCK;
917 coro_enq (aTHX_ SvREFCNT_inc (coro));
918 UNLOCK;
919}
920
921static void
922api_schedule (void)
923{
924 dTHX;
925
926 SV *prev, *next;
927
928 LOCK;
929
930 prev = SvRV (GvSV (coro_current)); 2924 SV *coro_hv = SvRV (coro_current);
931 next = coro_deq (aTHX_ PRIO_MIN); 2925 struct coro *coro = SvSTATE_hv (coro_hv);
932 2926
933 if (!next) 2927 /* put our coroutine id on the state arg */
934 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 2928 av_push (state, SvREFCNT_inc_NN (coro_hv));
935 2929
936 /* free this only after the transfer */ 2930 /* first see whether we have a non-zero priority and set it as AIO prio */
937 coro_mortal = prev; 2931 if (coro->prio)
938 SV_CORO (prev, "Coro::schedule"); 2932 {
2933 dSP;
939 2934
940 SvRV (GvSV (coro_current)) = next; 2935 static SV *prio_cv;
2936 static SV *prio_sv;
941 2937
942 SV_CORO (next, "Coro::schedule"); 2938 if (expect_false (!prio_cv))
2939 {
2940 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2941 prio_sv = newSViv (0);
2942 }
943 2943
944 UNLOCK; 2944 PUSHMARK (SP);
2945 sv_setiv (prio_sv, coro->prio);
2946 XPUSHs (prio_sv);
945 2947
946 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 2948 PUTBACK;
947 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 2949 call_sv (prio_cv, G_VOID | G_DISCARD);
948} 2950 }
949 2951
950static void 2952 /* now call the original request */
951api_cede (void) 2953 {
952{ 2954 dSP;
953 dTHX; 2955 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2956 int i;
954 2957
955 LOCK; 2958 PUSHMARK (SP);
956 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
957 UNLOCK;
958 2959
959 api_schedule (); 2960 /* first push all args to the stack */
960} 2961 EXTEND (SP, items + 1);
961 2962
2963 for (i = 0; i < items; ++i)
2964 PUSHs (arg [i]);
2965
2966 /* now push the callback closure */
2967 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2968
2969 /* now call the AIO function - we assume our request is uncancelable */
2970 PUTBACK;
2971 call_sv ((SV *)req, G_VOID | G_DISCARD);
2972 }
2973
2974 /* now that the request is going, we loop till we have a result */
2975 frame->data = (void *)state;
2976 frame->prepare = prepare_schedule;
2977 frame->check = slf_check_aio_req;
2978}
2979
2980static void
2981coro_aio_req_xs (pTHX_ CV *cv)
2982{
2983 dXSARGS;
2984
2985 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2986
2987 XSRETURN_EMPTY;
2988}
2989
2990/*****************************************************************************/
2991
2992#if CORO_CLONE
2993# include "clone.c"
2994#endif
2995
2996/*****************************************************************************/
2997
2998static SV *
2999coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3000{
3001 SV *coro_sv;
3002 struct coro *coro;
3003 MAGIC *mg;
3004 HV *hv;
3005 SV *cb;
3006 int i;
3007
3008 if (argc > 0)
3009 {
3010 cb = s_get_cv_croak (argv [0]);
3011
3012 if (!is_coro)
3013 {
3014 if (CvISXSUB (cb))
3015 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3016
3017 if (!CvROOT (cb))
3018 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3019 }
3020 }
3021
3022 Newz (0, coro, 1, struct coro);
3023 coro->args = newAV ();
3024 coro->flags = CF_NEW;
3025
3026 if (coro_first) coro_first->prev = coro;
3027 coro->next = coro_first;
3028 coro_first = coro;
3029
3030 coro->hv = hv = newHV ();
3031 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3032 mg->mg_flags |= MGf_DUP;
3033 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3034
3035 if (argc > 0)
3036 {
3037 av_extend (coro->args, argc + is_coro - 1);
3038
3039 if (is_coro)
3040 {
3041 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3042 cb = (SV *)cv_coro_run;
3043 }
3044
3045 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3046
3047 for (i = 1; i < argc; i++)
3048 av_push (coro->args, newSVsv (argv [i]));
3049 }
3050
3051 return coro_sv;
3052}
3053
962MODULE = Coro::State PACKAGE = Coro::State 3054MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
963 3055
964PROTOTYPES: ENABLE 3056PROTOTYPES: DISABLE
965 3057
966BOOT: 3058BOOT:
967{ /* {} necessary for stoopid perl-5.6.x */ 3059{
968#ifdef USE_ITHREADS 3060#ifdef USE_ITHREADS
969 MUTEX_INIT (&coro_mutex); 3061# if CORO_PTHREAD
3062 coro_thx = PERL_GET_CONTEXT;
3063# endif
970#endif 3064#endif
3065 BOOT_PAGESIZE;
971 3066
972 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 3067 cctx_current = cctx_new_empty ();
973 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 3068
3069 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3070 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3071
3072 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3073 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3074 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3075
3076 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3077 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3078 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3079
974 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3080 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
975 3081
976 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3082 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
977 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3083 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
978 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3084 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
979 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 3085 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
980 3086
981 main_mainstack = PL_mainstack; 3087 main_mainstack = PL_mainstack;
3088 main_top_env = PL_top_env;
982 3089
3090 while (main_top_env->je_prev)
3091 main_top_env = main_top_env->je_prev;
3092
3093 {
3094 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3095
3096 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3097 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3098
3099 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3100 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3101 }
3102
983 coroapi.ver = CORO_API_VERSION; 3103 coroapi.ver = CORO_API_VERSION;
3104 coroapi.rev = CORO_API_REVISION;
3105
984 coroapi.transfer = api_transfer; 3106 coroapi.transfer = api_transfer;
985}
986 3107
987Coro::State 3108 coroapi.sv_state = SvSTATE_;
988_newprocess(args) 3109 coroapi.execute_slf = api_execute_slf;
989 SV * args 3110 coroapi.prepare_nop = prepare_nop;
990 PROTOTYPE: $ 3111 coroapi.prepare_schedule = prepare_schedule;
3112 coroapi.prepare_cede = prepare_cede;
3113 coroapi.prepare_cede_notself = prepare_cede_notself;
3114
3115 {
3116 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
3117
3118 if (!svp) croak ("Time::HiRes is required");
3119 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
3120
3121 nvtime = INT2PTR (double (*)(), SvIV (*svp));
3122
3123 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
3124 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
3125 }
3126
3127 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3128}
3129
3130SV *
3131new (SV *klass, ...)
3132 ALIAS:
3133 Coro::new = 1
991 CODE: 3134 CODE:
992 Coro__State coro; 3135 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
993 3136 OUTPUT:
994 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
995 croak ("Coro::State::_newprocess expects an arrayref");
996
997 Newz (0, coro, 1, struct coro);
998
999 coro->args = (AV *)SvREFCNT_inc (SvRV (args));
1000 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1001 /*coro->stack = 0;*/
1002
1003 /* same as JMPENV_BOOTSTRAP */
1004 /* we might be able to recycle start_env, but safe is safe */
1005 /*Zero(&coro->start_env, 1, JMPENV);*/
1006 coro->start_env.je_ret = -1;
1007 coro->start_env.je_mustcatch = TRUE;
1008
1009 RETVAL = coro;
1010 OUTPUT:
1011 RETVAL 3137 RETVAL
1012 3138
1013void 3139void
1014transfer(prev, next, flags) 3140transfer (...)
1015 SV *prev
1016 SV *next
1017 int flags
1018 PROTOTYPE: @ 3141 PROTOTYPE: $$
1019 CODE: 3142 CODE:
1020 PUTBACK; 3143 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1021 SV_CORO (next, "Coro::transfer"); 3144
1022 SV_CORO (prev, "Coro::transfer"); 3145bool
1023 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 3146_destroy (SV *coro_sv)
1024 SPAGAIN; 3147 CODE:
3148 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
3149 OUTPUT:
3150 RETVAL
1025 3151
1026void 3152void
1027DESTROY(coro)
1028 Coro::State coro
1029 CODE:
1030
1031 if (coro->mainstack && coro->mainstack != main_mainstack)
1032 {
1033 struct coro temp;
1034
1035 PUTBACK;
1036 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1037 LOAD (aTHX_ coro);
1038 SPAGAIN;
1039
1040 destroy_stacks (aTHX);
1041
1042 LOAD ((&temp)); /* this will get rid of defsv etc.. */
1043 SPAGAIN;
1044
1045 coro->mainstack = 0;
1046 }
1047
1048 deallocate_stack (coro);
1049 SvREFCNT_dec (coro->args);
1050 Safefree (coro);
1051
1052void
1053_exit(code) 3153_exit (int code)
1054 int code
1055 PROTOTYPE: $ 3154 PROTOTYPE: $
1056 CODE: 3155 CODE:
1057 _exit (code); 3156 _exit (code);
1058 3157
1059MODULE = Coro::State PACKAGE = Coro::Cont 3158SV *
3159clone (Coro::State coro)
3160 CODE:
3161{
3162#if CORO_CLONE
3163 struct coro *ncoro = coro_clone (aTHX_ coro);
3164 MAGIC *mg;
3165 /* TODO: too much duplication */
3166 ncoro->hv = newHV ();
3167 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3168 mg->mg_flags |= MGf_DUP;
3169 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3170#else
3171 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3172#endif
3173}
3174 OUTPUT:
3175 RETVAL
1060 3176
1061# this is slightly dirty (should expose a c-level api) 3177int
3178cctx_stacksize (int new_stacksize = 0)
3179 PROTOTYPE: ;$
3180 CODE:
3181 RETVAL = cctx_stacksize;
3182 if (new_stacksize)
3183 {
3184 cctx_stacksize = new_stacksize;
3185 ++cctx_gen;
3186 }
3187 OUTPUT:
3188 RETVAL
3189
3190int
3191cctx_max_idle (int max_idle = 0)
3192 PROTOTYPE: ;$
3193 CODE:
3194 RETVAL = cctx_max_idle;
3195 if (max_idle > 1)
3196 cctx_max_idle = max_idle;
3197 OUTPUT:
3198 RETVAL
3199
3200int
3201cctx_count ()
3202 PROTOTYPE:
3203 CODE:
3204 RETVAL = cctx_count;
3205 OUTPUT:
3206 RETVAL
3207
3208int
3209cctx_idle ()
3210 PROTOTYPE:
3211 CODE:
3212 RETVAL = cctx_idle;
3213 OUTPUT:
3214 RETVAL
1062 3215
1063void 3216void
1064yield(...) 3217list ()
1065 PROTOTYPE: @ 3218 PROTOTYPE:
3219 PPCODE:
3220{
3221 struct coro *coro;
3222 for (coro = coro_first; coro; coro = coro->next)
3223 if (coro->hv)
3224 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3225}
3226
3227void
3228call (Coro::State coro, SV *coderef)
3229 ALIAS:
3230 eval = 1
3231 CODE:
3232{
3233 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3234 {
3235 struct coro *current = SvSTATE_current;
3236
3237 if (current != coro)
3238 {
3239 PUTBACK;
3240 save_perl (aTHX_ current);
3241 load_perl (aTHX_ coro);
3242 SPAGAIN;
3243 }
3244
3245 PUSHSTACK;
3246
3247 PUSHMARK (SP);
3248 PUTBACK;
3249
3250 if (ix)
3251 eval_sv (coderef, 0);
3252 else
3253 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3254
3255 POPSTACK;
3256 SPAGAIN;
3257
3258 if (current != coro)
3259 {
3260 PUTBACK;
3261 save_perl (aTHX_ coro);
3262 load_perl (aTHX_ current);
3263 SPAGAIN;
3264 }
3265 }
3266}
3267
3268SV *
3269is_ready (Coro::State coro)
3270 PROTOTYPE: $
3271 ALIAS:
3272 is_ready = CF_READY
3273 is_running = CF_RUNNING
3274 is_new = CF_NEW
3275 is_destroyed = CF_DESTROYED
3276 is_suspended = CF_SUSPENDED
3277 CODE:
3278 RETVAL = boolSV (coro->flags & ix);
3279 OUTPUT:
3280 RETVAL
3281
3282void
3283throw (Coro::State self, SV *exception = &PL_sv_undef)
3284 PROTOTYPE: $;$
1066 CODE: 3285 CODE:
1067 SV *yieldstack; 3286{
1068 SV *sv; 3287 struct coro *current = SvSTATE_current;
1069 AV *defav = GvAV (PL_defgv); 3288 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
1070 struct coro *prev, *next;
1071
1072 yieldstack = *hv_fetch (
1073 (HV *)SvRV (GvSV (coro_current)),
1074 "yieldstack", sizeof ("yieldstack") - 1,
1075 0
1076 );
1077
1078 /* set up @_ -- ugly */
1079 av_clear (defav);
1080 av_fill (defav, items - 1);
1081 while (items--)
1082 av_store (defav, items, SvREFCNT_inc (ST(items)));
1083
1084 sv = av_pop ((AV *)SvRV (yieldstack));
1085 prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))));
1086 next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))));
1087 SvREFCNT_dec (sv); 3289 SvREFCNT_dec (*exceptionp);
1088 3290 SvGETMAGIC (exception);
1089 transfer (aTHX_ prev, next, 0); 3291 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
1090
1091MODULE = Coro::State PACKAGE = Coro
1092
1093# this is slightly dirty (should expose a c-level api)
1094
1095BOOT:
1096{
1097 int i;
1098 HV *stash = gv_stashpv ("Coro", TRUE);
1099
1100 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1101 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1102 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1103 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1104 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1105 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1106
1107 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1108 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1109
1110 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1111 coro_ready[i] = newAV ();
1112
1113 {
1114 SV *sv = perl_get_sv("Coro::API", 1);
1115
1116 coroapi.schedule = api_schedule;
1117 coroapi.cede = api_cede;
1118 coroapi.ready = api_ready;
1119 coroapi.nready = &coro_nready;
1120 coroapi.current = coro_current;
1121
1122 GCoroAPI = &coroapi;
1123 sv_setiv(sv, (IV)&coroapi);
1124 SvREADONLY_on(sv);
1125 }
1126} 3292}
1127
1128#if !PERL_MICRO
1129 3293
1130void 3294void
1131ready(self) 3295api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1132 SV * self 3296 PROTOTYPE: $;$
3297 C_ARGS: aTHX_ coro, flags
3298
3299SV *
3300has_cctx (Coro::State coro)
1133 PROTOTYPE: $ 3301 PROTOTYPE: $
1134 CODE: 3302 CODE:
1135 api_ready (self); 3303 /* maybe manage the running flag differently */
1136 3304 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1137#endif 3305 OUTPUT:
3306 RETVAL
1138 3307
1139int 3308int
3309is_traced (Coro::State coro)
3310 PROTOTYPE: $
3311 CODE:
3312 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3313 OUTPUT:
3314 RETVAL
3315
3316UV
3317rss (Coro::State coro)
3318 PROTOTYPE: $
3319 ALIAS:
3320 usecount = 1
3321 CODE:
3322 switch (ix)
3323 {
3324 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3325 case 1: RETVAL = coro->usecount; break;
3326 }
3327 OUTPUT:
3328 RETVAL
3329
3330void
3331force_cctx ()
3332 PROTOTYPE:
3333 CODE:
3334 cctx_current->idle_sp = 0;
3335
3336void
3337swap_defsv (Coro::State self)
3338 PROTOTYPE: $
3339 ALIAS:
3340 swap_defav = 1
3341 CODE:
3342 if (!self->slot)
3343 croak ("cannot swap state with coroutine that has no saved state,");
3344 else
3345 {
3346 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3347 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3348
3349 SV *tmp = *src; *src = *dst; *dst = tmp;
3350 }
3351
3352void
3353cancel (Coro::State self)
3354 CODE:
3355 coro_state_destroy (aTHX_ self);
3356 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3357
3358
3359SV *
3360enable_times (int enabled = enable_times)
3361 CODE:
3362{
3363 RETVAL = boolSV (enable_times);
3364
3365 if (enabled != enable_times)
3366 {
3367 enable_times = enabled;
3368
3369 coro_times_update ();
3370 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3371 }
3372}
3373 OUTPUT:
3374 RETVAL
3375
3376void
3377times (Coro::State self)
3378 PPCODE:
3379{
3380 struct coro *current = SvSTATE (coro_current);
3381
3382 if (expect_false (current == self))
3383 {
3384 coro_times_update ();
3385 coro_times_add (SvSTATE (coro_current));
3386 }
3387
3388 EXTEND (SP, 2);
3389 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3390 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3391
3392 if (expect_false (current == self))
3393 coro_times_sub (SvSTATE (coro_current));
3394}
3395
3396void
3397swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3398 CODE:
3399{
3400 struct coro *current = SvSTATE_current;
3401
3402 if (current == coro)
3403 SWAP_SVS (current);
3404
3405 if (!coro->swap_sv)
3406 coro->swap_sv = newAV ();
3407
3408 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3409 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3410
3411 if (current == coro)
3412 SWAP_SVS (current);
3413}
3414
3415
3416MODULE = Coro::State PACKAGE = Coro
3417
3418BOOT:
3419{
3420 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3421 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3422 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3423 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3424 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3425 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3426 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3427 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3428 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3429
3430 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3431 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3432 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3433 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3434
3435 coro_stash = gv_stashpv ("Coro", TRUE);
3436
3437 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
3438 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
3439 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
3440 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
3441 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
3442 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
3443
3444 {
3445 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
3446
3447 coroapi.schedule = api_schedule;
3448 coroapi.schedule_to = api_schedule_to;
3449 coroapi.cede = api_cede;
3450 coroapi.cede_notself = api_cede_notself;
3451 coroapi.ready = api_ready;
3452 coroapi.is_ready = api_is_ready;
3453 coroapi.nready = coro_nready;
3454 coroapi.current = coro_current;
3455
3456 /*GCoroAPI = &coroapi;*/
3457 sv_setiv (sv, (IV)&coroapi);
3458 SvREADONLY_on (sv);
3459 }
3460}
3461
3462SV *
3463async (...)
3464 PROTOTYPE: &@
3465 CODE:
3466 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3467 api_ready (aTHX_ RETVAL);
3468 OUTPUT:
3469 RETVAL
3470
3471void
3472terminate (...)
3473 CODE:
3474 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3475
3476void
3477schedule (...)
3478 CODE:
3479 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3480
3481void
3482schedule_to (...)
3483 CODE:
3484 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3485
3486void
3487cede_to (...)
3488 CODE:
3489 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3490
3491void
3492cede (...)
3493 CODE:
3494 CORO_EXECUTE_SLF_XS (slf_init_cede);
3495
3496void
3497cede_notself (...)
3498 CODE:
3499 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3500
3501void
3502_set_current (SV *current)
3503 PROTOTYPE: $
3504 CODE:
3505 SvREFCNT_dec (SvRV (coro_current));
3506 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3507
3508void
3509_set_readyhook (SV *hook)
3510 PROTOTYPE: $
3511 CODE:
3512 SvREFCNT_dec (coro_readyhook);
3513 SvGETMAGIC (hook);
3514 if (SvOK (hook))
3515 {
3516 coro_readyhook = newSVsv (hook);
3517 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3518 }
3519 else
3520 {
3521 coro_readyhook = 0;
3522 CORO_READYHOOK = 0;
3523 }
3524
3525int
3526prio (Coro::State coro, int newprio = 0)
3527 PROTOTYPE: $;$
3528 ALIAS:
3529 nice = 1
3530 CODE:
3531{
3532 RETVAL = coro->prio;
3533
3534 if (items > 1)
3535 {
3536 if (ix)
3537 newprio = coro->prio - newprio;
3538
3539 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
3540 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
3541
3542 coro->prio = newprio;
3543 }
3544}
3545 OUTPUT:
3546 RETVAL
3547
3548SV *
3549ready (SV *self)
3550 PROTOTYPE: $
3551 CODE:
3552 RETVAL = boolSV (api_ready (aTHX_ self));
3553 OUTPUT:
3554 RETVAL
3555
3556int
1140nready(...) 3557nready (...)
1141 PROTOTYPE: 3558 PROTOTYPE:
1142 CODE: 3559 CODE:
1143 RETVAL = coro_nready; 3560 RETVAL = coro_nready;
1144 OUTPUT: 3561 OUTPUT:
1145 RETVAL 3562 RETVAL
1146 3563
1147void 3564void
1148schedule(...) 3565suspend (Coro::State self)
1149 PROTOTYPE: 3566 PROTOTYPE: $
1150 CODE: 3567 CODE:
1151 api_schedule (); 3568 self->flags |= CF_SUSPENDED;
1152 3569
1153void 3570void
1154cede(...) 3571resume (Coro::State self)
1155 PROTOTYPE: 3572 PROTOTYPE: $
1156 CODE: 3573 CODE:
1157 api_cede (); 3574 self->flags &= ~CF_SUSPENDED;
1158 3575
1159# and these are hacks 3576void
3577_pool_handler (...)
3578 CODE:
3579 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3580
3581void
3582async_pool (SV *cv, ...)
3583 PROTOTYPE: &@
3584 PPCODE:
3585{
3586 HV *hv = (HV *)av_pop (av_async_pool);
3587 AV *av = newAV ();
3588 SV *cb = ST (0);
3589 int i;
3590
3591 av_extend (av, items - 2);
3592 for (i = 1; i < items; ++i)
3593 av_push (av, SvREFCNT_inc_NN (ST (i)));
3594
3595 if ((SV *)hv == &PL_sv_undef)
3596 {
3597 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3598 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3599 SvREFCNT_dec (sv);
3600 }
3601
3602 {
3603 struct coro *coro = SvSTATE_hv (hv);
3604
3605 assert (!coro->invoke_cb);
3606 assert (!coro->invoke_av);
3607 coro->invoke_cb = SvREFCNT_inc (cb);
3608 coro->invoke_av = av;
3609 }
3610
3611 api_ready (aTHX_ (SV *)hv);
3612
3613 if (GIMME_V != G_VOID)
3614 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3615 else
3616 SvREFCNT_dec (hv);
3617}
3618
1160SV * 3619SV *
1161_aio_get_state () 3620rouse_cb ()
3621 PROTOTYPE:
1162 CODE: 3622 CODE:
1163{ 3623 RETVAL = coro_new_rouse_cb (aTHX);
1164 struct {
1165 int errorno;
1166 int laststype;
1167 int laststatval;
1168 Stat_t statcache;
1169 } data;
1170
1171 data.errorno = errno;
1172 data.laststype = PL_laststype;
1173 data.laststatval = PL_laststatval;
1174 data.statcache = PL_statcache;
1175
1176 RETVAL = newSVpvn ((char *)&data, sizeof data);
1177}
1178 OUTPUT: 3624 OUTPUT:
1179 RETVAL 3625 RETVAL
1180 3626
1181void 3627void
1182_aio_set_state (char *data_) 3628rouse_wait (...)
3629 PROTOTYPE: ;$
3630 PPCODE:
3631 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3632
3633void
3634on_enter (SV *block)
3635 ALIAS:
3636 on_leave = 1
1183 PROTOTYPE: $ 3637 PROTOTYPE: &
1184 CODE: 3638 CODE:
1185{ 3639{
1186 struct { 3640 struct coro *coro = SvSTATE_current;
3641 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3642
3643 block = s_get_cv_croak (block);
3644
3645 if (!*avp)
3646 *avp = newAV ();
3647
3648 av_push (*avp, SvREFCNT_inc (block));
3649
3650 if (!ix)
3651 on_enterleave_call (aTHX_ block);
3652
3653 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3654 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3655 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3656}
3657
3658
3659MODULE = Coro::State PACKAGE = PerlIO::cede
3660
3661BOOT:
3662 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3663
3664
3665MODULE = Coro::State PACKAGE = Coro::Semaphore
3666
3667SV *
3668new (SV *klass, SV *count = 0)
3669 CODE:
3670{
3671 int semcnt = 1;
3672
3673 if (count)
3674 {
3675 SvGETMAGIC (count);
3676
3677 if (SvOK (count))
3678 semcnt = SvIV (count);
3679 }
3680
3681 RETVAL = sv_bless (
3682 coro_waitarray_new (aTHX_ semcnt),
3683 GvSTASH (CvGV (cv))
3684 );
3685}
3686 OUTPUT:
3687 RETVAL
3688
3689# helper for Coro::Channel and others
3690SV *
3691_alloc (int count)
3692 CODE:
3693 RETVAL = coro_waitarray_new (aTHX_ count);
3694 OUTPUT:
3695 RETVAL
3696
3697SV *
3698count (SV *self)
3699 CODE:
3700 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3701 OUTPUT:
3702 RETVAL
3703
3704void
3705up (SV *self, int adjust = 1)
3706 ALIAS:
3707 adjust = 1
3708 CODE:
3709 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3710
3711void
3712down (...)
3713 CODE:
3714 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3715
3716void
3717wait (...)
3718 CODE:
3719 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3720
3721void
3722try (SV *self)
3723 PPCODE:
3724{
3725 AV *av = (AV *)SvRV (self);
3726 SV *count_sv = AvARRAY (av)[0];
3727 IV count = SvIVX (count_sv);
3728
3729 if (count > 0)
3730 {
3731 --count;
3732 SvIVX (count_sv) = count;
3733 XSRETURN_YES;
3734 }
3735 else
3736 XSRETURN_NO;
3737}
3738
3739void
3740waiters (SV *self)
3741 PPCODE:
3742{
3743 AV *av = (AV *)SvRV (self);
3744 int wcount = AvFILLp (av) + 1 - 1;
3745
3746 if (GIMME_V == G_SCALAR)
3747 XPUSHs (sv_2mortal (newSViv (wcount)));
3748 else
3749 {
1187 int errorno; 3750 int i;
1188 int laststype; 3751 EXTEND (SP, wcount);
1189 int laststatval; 3752 for (i = 1; i <= wcount; ++i)
1190 Stat_t statcache; 3753 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1191 } *data = (void *)data_; 3754 }
1192
1193 errno = data->errorno;
1194 PL_laststype = data->laststype;
1195 PL_laststatval = data->laststatval;
1196 PL_statcache = data->statcache;
1197} 3755}
3756
3757MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3758
3759void
3760_may_delete (SV *sem, int count, int extra_refs)
3761 PPCODE:
3762{
3763 AV *av = (AV *)SvRV (sem);
3764
3765 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3766 && AvFILLp (av) == 0 /* no waiters, just count */
3767 && SvIV (AvARRAY (av)[0]) == count)
3768 XSRETURN_YES;
3769
3770 XSRETURN_NO;
3771}
3772
3773MODULE = Coro::State PACKAGE = Coro::Signal
3774
3775SV *
3776new (SV *klass)
3777 CODE:
3778 RETVAL = sv_bless (
3779 coro_waitarray_new (aTHX_ 0),
3780 GvSTASH (CvGV (cv))
3781 );
3782 OUTPUT:
3783 RETVAL
3784
3785void
3786wait (...)
3787 CODE:
3788 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3789
3790void
3791broadcast (SV *self)
3792 CODE:
3793{
3794 AV *av = (AV *)SvRV (self);
3795 coro_signal_wake (aTHX_ av, AvFILLp (av));
3796}
3797
3798void
3799send (SV *self)
3800 CODE:
3801{
3802 AV *av = (AV *)SvRV (self);
3803
3804 if (AvFILLp (av))
3805 coro_signal_wake (aTHX_ av, 1);
3806 else
3807 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3808}
3809
3810IV
3811awaited (SV *self)
3812 CODE:
3813 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3814 OUTPUT:
3815 RETVAL
3816
3817
3818MODULE = Coro::State PACKAGE = Coro::AnyEvent
3819
3820BOOT:
3821 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3822
3823void
3824_schedule (...)
3825 CODE:
3826{
3827 static int incede;
3828
3829 api_cede_notself (aTHX);
3830
3831 ++incede;
3832 while (coro_nready >= incede && api_cede (aTHX))
3833 ;
3834
3835 sv_setsv (sv_activity, &PL_sv_undef);
3836 if (coro_nready >= incede)
3837 {
3838 PUSHMARK (SP);
3839 PUTBACK;
3840 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3841 }
3842
3843 --incede;
3844}
3845
3846
3847MODULE = Coro::State PACKAGE = Coro::AIO
3848
3849void
3850_register (char *target, char *proto, SV *req)
3851 CODE:
3852{
3853 SV *req_cv = s_get_cv_croak (req);
3854 /* newXSproto doesn't return the CV on 5.8 */
3855 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3856 sv_setpv ((SV *)slf_cv, proto);
3857 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3858}
3859
3860MODULE = Coro::State PACKAGE = Coro::Select
3861
3862void
3863patch_pp_sselect ()
3864 CODE:
3865 if (!coro_old_pp_sselect)
3866 {
3867 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
3868 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
3869 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
3870 }
3871
3872void
3873unpatch_pp_sselect ()
3874 CODE:
3875 if (coro_old_pp_sselect)
3876 {
3877 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
3878 coro_old_pp_sselect = 0;
3879 }
3880

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