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Comparing Coro/Coro/State.xs (file contents):
Revision 1.156 by root, Fri Sep 21 01:10:55 2007 UTC vs.
Revision 1.435 by root, Sat Nov 2 19:49:33 2013 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 /* perl usually disables NDEBUG later */
5
1#include "libcoro/coro.c" 6#include "libcoro/coro.c"
2 7
3#define PERL_NO_GET_CONTEXT 8#define PERL_NO_GET_CONTEXT
9#define PERL_EXT
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
18#define ECB_NO_THREADS 1
19#include "ecb.h"
20
21#include <stddef.h>
11#include <stdio.h> 22#include <stdio.h>
12#include <errno.h> 23#include <errno.h>
13#include <assert.h> 24#include <assert.h>
14 25
15#ifdef HAVE_MMAP 26#ifndef SVs_PADSTALE
16# include <unistd.h> 27# define SVs_PADSTALE 0
17# include <sys/mman.h>
18# ifndef MAP_ANONYMOUS
19# ifdef MAP_ANON
20# define MAP_ANONYMOUS MAP_ANON
21# else
22# undef HAVE_MMAP
23# endif 28#endif
29
30#ifdef PadARRAY
31# define NEWPADAPI 1
32# define newPADLIST(var) (Newz (0, var, 1, PADLIST), Newx (PadlistARRAY (var), 2, PAD *))
33#else
34typedef AV PADNAMELIST;
35# if !PERL_VERSION_ATLEAST(5,8,0)
36typedef AV PADLIST;
37typedef AV PAD;
24# endif 38# endif
25# include <limits.h> 39# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
26# ifndef PAGESIZE 40# define PadlistMAX(pl) AvFILLp (pl)
27# define PAGESIZE pagesize 41# define PadlistNAMES(pl) (*PadlistARRAY (pl))
28# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 42# define PadARRAY AvARRAY
29static long pagesize; 43# define PadMAX AvFILLp
30# else 44# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
31# define BOOT_PAGESIZE (void)0
32# endif 45#endif
46
47#if defined(_WIN32)
48# undef HAS_GETTIMEOFDAY
49# undef setjmp
50# undef longjmp
51# undef _exit
52# define setjmp _setjmp /* deep magic */
33#else 53#else
34# define PAGESIZE 0 54# include <inttypes.h> /* most portable stdint.h */
35# define BOOT_PAGESIZE (void)0
36#endif
37
38#if CORO_USE_VALGRIND
39# include <valgrind/valgrind.h>
40# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
41#else
42# define REGISTER_STACK(cctx,start,end)
43#endif 55#endif
44 56
45/* the maximum number of idle cctx that will be pooled */ 57/* the maximum number of idle cctx that will be pooled */
46#define MAX_IDLE_CCTX 8 58static int cctx_max_idle = 4;
47 59
48#define PERL_VERSION_ATLEAST(a,b,c) \ 60#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
49 (PERL_REVISION > (a) \ 61# define HAS_SCOPESTACK_NAME 1
50 || (PERL_REVISION == (a) \
51 && (PERL_VERSION > (b) \
52 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
53
54#if !PERL_VERSION_ATLEAST (5,6,0)
55# ifndef PL_ppaddr
56# define PL_ppaddr ppaddr
57# endif
58# ifndef call_sv
59# define call_sv perl_call_sv
60# endif
61# ifndef get_sv
62# define get_sv perl_get_sv
63# endif
64# ifndef get_cv
65# define get_cv perl_get_cv
66# endif
67# ifndef IS_PADGV
68# define IS_PADGV(v) 0
69# endif
70# ifndef IS_PADCONST
71# define IS_PADCONST(v) 0
72# endif
73#endif
74
75/* 5.8.7 */
76#ifndef SvRV_set
77# define SvRV_set(s,v) SvRV(s) = (v)
78#endif
79
80#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
81# undef CORO_STACKGUARD
82#endif
83
84#ifndef CORO_STACKGUARD
85# define CORO_STACKGUARD 0
86#endif 62#endif
87 63
88/* prefer perl internal functions over our own? */ 64/* prefer perl internal functions over our own? */
89#ifndef CORO_PREFER_PERL_FUNCTIONS 65#ifndef CORO_PREFER_PERL_FUNCTIONS
90# define CORO_PREFER_PERL_FUNCTIONS 0 66# define CORO_PREFER_PERL_FUNCTIONS 0
91#endif 67#endif
92 68
93/* The next macro should declare a variable stacklevel that contains and approximation 69/* The next macros try to return the current stack pointer, in an as
94 * to the current C stack pointer. Its property is that it changes with each call 70 * portable way as possible. */
95 * and should be unique. */
96#define dSTACKLEVEL int stacklevel
97#define STACKLEVEL ((void *)&stacklevel)
98
99#define IN_DESTRUCT (PL_main_cv == Nullcv)
100
101#if __GNUC__ >= 3 71#if __GNUC__ >= 4
102# define attribute(x) __attribute__(x) 72# define dSTACKLEVEL int stacklevel_dummy
103# define BARRIER __asm__ __volatile__ ("" : : : "memory") 73# define STACKLEVEL __builtin_frame_address (0)
104#else 74#else
105# define attribute(x) 75# define dSTACKLEVEL volatile void *stacklevel
106# define BARRIER 76# define STACKLEVEL ((void *)&stacklevel)
107#endif 77#endif
108 78
109#define NOINLINE attribute ((noinline)) 79#define IN_DESTRUCT PL_dirty
110 80
111#include "CoroAPI.h" 81#include "CoroAPI.h"
82#define GCoroAPI (&coroapi) /* very sneaky */
112 83
113#ifdef USE_ITHREADS 84#ifdef USE_ITHREADS
114static perl_mutex coro_mutex; 85# if CORO_PTHREAD
115# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 86static void *coro_thx;
116# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
117#else
118# define LOCK (void)0
119# define UNLOCK (void)0
120#endif 87# endif
88#endif
121 89
122/* helper storage struct for Coro::AIO */ 90#ifdef __linux
123struct io_state 91# include <time.h> /* for timespec */
124{ 92# include <syscall.h> /* for SYS_* */
125 int errorno; 93# ifdef SYS_clock_gettime
126 I32 laststype; 94# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
127 int laststatval; 95# define CORO_CLOCK_MONOTONIC 1
128 Stat_t statcache; 96# define CORO_CLOCK_THREAD_CPUTIME_ID 3
129}; 97# endif
98#endif
130 99
100static double (*nvtime)(); /* so why doesn't it take void? */
101static void (*u2time)(pTHX_ UV ret[2]);
102
103/* we hijack an hopefully unused CV flag for our purposes */
104#define CVf_SLF 0x4000
105static OP *pp_slf (pTHX);
106static void slf_destroy (pTHX_ struct coro *coro);
107
108static U32 cctx_gen;
131static size_t coro_stacksize = CORO_STACKSIZE; 109static size_t cctx_stacksize = CORO_STACKSIZE;
132static struct CoroAPI coroapi; 110static struct CoroAPI coroapi;
133static AV *main_mainstack; /* used to differentiate between $main and others */ 111static AV *main_mainstack; /* used to differentiate between $main and others */
134static JMPENV *main_top_env; 112static JMPENV *main_top_env;
135static HV *coro_state_stash, *coro_stash; 113static HV *coro_state_stash, *coro_stash;
136static SV *coro_mortal; /* will be freed after next transfer */ 114static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
115
116static AV *av_destroy; /* destruction queue */
117static SV *sv_manager; /* the manager coro */
118static SV *sv_idle; /* $Coro::idle */
119
120static GV *irsgv; /* $/ */
121static GV *stdoutgv; /* *STDOUT */
122static SV *rv_diehook;
123static SV *rv_warnhook;
124static HV *hv_sig; /* %SIG */
125
126/* async_pool helper stuff */
127static SV *sv_pool_rss;
128static SV *sv_pool_size;
129static SV *sv_async_pool_idle; /* description string */
130static AV *av_async_pool; /* idle pool */
131static SV *sv_Coro; /* class string */
132static CV *cv_pool_handler;
133
134/* Coro::AnyEvent */
135static SV *sv_activity;
136
137/* enable processtime/realtime profiling */
138static char enable_times;
139typedef U32 coro_ts[2];
140static coro_ts time_real, time_cpu;
141static char times_valid;
137 142
138static struct coro_cctx *cctx_first; 143static struct coro_cctx *cctx_first;
139static int cctx_count, cctx_idle; 144static int cctx_count, cctx_idle;
140 145
146enum
147{
148 CC_MAPPED = 0x01,
149 CC_NOREUSE = 0x02, /* throw this away after tracing */
150 CC_TRACE = 0x04,
151 CC_TRACE_SUB = 0x08, /* trace sub calls */
152 CC_TRACE_LINE = 0x10, /* trace each statement */
153 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
154};
155
141/* this is a structure representing a c-level coroutine */ 156/* this is a structure representing a c-level coroutine */
142typedef struct coro_cctx { 157typedef struct coro_cctx
158{
143 struct coro_cctx *next; 159 struct coro_cctx *next;
144 160
145 /* the stack */ 161 /* the stack */
146 void *sptr; 162 struct coro_stack stack;
147 size_t ssize;
148 163
149 /* cpu state */ 164 /* cpu state */
150 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 165 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
166#ifndef NDEBUG
151 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 167 JMPENV *idle_te; /* same as idle_sp, but for top_env */
168#endif
152 JMPENV *top_env; 169 JMPENV *top_env;
153 coro_context cctx; 170 coro_context cctx;
154 171
172 U32 gen;
155#if CORO_USE_VALGRIND 173#if CORO_USE_VALGRIND
156 int valgrind_id; 174 int valgrind_id;
157#endif 175#endif
158 char inuse, mapped; 176 unsigned char flags;
159} coro_cctx; 177} coro_cctx;
160 178
179static coro_cctx *cctx_current; /* the currently running cctx */
180
181/*****************************************************************************/
182
183static MGVTBL coro_state_vtbl;
184
161enum { 185enum
186{
162 CF_RUNNING = 0x0001, /* coroutine is running */ 187 CF_RUNNING = 0x0001, /* coroutine is running */
163 CF_READY = 0x0002, /* coroutine is ready */ 188 CF_READY = 0x0002, /* coroutine is ready */
164 CF_NEW = 0x0004, /* has never been switched to */ 189 CF_NEW = 0x0004, /* has never been switched to */
165 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 190 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
191 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
192 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
166}; 193};
167 194
195/* the structure where most of the perl state is stored, overlaid on the cxstack */
196typedef struct
197{
198 #define VARx(name,expr,type) type name;
199 #include "state.h"
200} perl_slots;
201
202/* how many context stack entries do we need for perl_slots */
203#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
204
168/* this is a structure representing a perl-level coroutine */ 205/* this is a structure representing a perl-level coroutine */
169struct coro { 206struct coro
207{
170 /* the c coroutine allocated to this perl coroutine, if any */ 208 /* the C coroutine allocated to this perl coroutine, if any */
171 coro_cctx *cctx; 209 coro_cctx *cctx;
172 210
211 /* ready queue */
212 struct coro *next_ready;
213
214 /* state data */
215 struct CoroSLF slf_frame; /* saved slf frame */
216 AV *mainstack;
217 perl_slots *slot; /* basically the saved sp */
218
219 CV *startcv; /* the CV to execute */
173 /* data associated with this coroutine (initial args) */ 220 AV *args; /* data associated with this coroutine (initial args) */
174 AV *args;
175 int refcnt;
176 int save; /* CORO_SAVE flags */
177 int flags; /* CF_ flags */ 221 int flags; /* CF_ flags */
222 HV *hv; /* the perl hash associated with this coro, if any */
178 223
179 /* optionally saved, might be zero */ 224 /* statistics */
180 AV *defav; /* @_ */ 225 int usecount; /* number of transfers to this coro */
181 SV *defsv; /* $_ */
182 SV *errsv; /* $@ */
183 GV *deffh; /* default filehandle */
184 SV *irssv; /* $/ */
185 SV *irssv_sv; /* real $/ cache */
186
187#define VAR(name,type) type name;
188# include "state.h"
189#undef VAR
190 226
191 /* coro process data */ 227 /* coro process data */
192 int prio; 228 int prio;
229 SV *except; /* exception to be thrown */
230 SV *rouse_cb; /* last rouse callback */
231 AV *on_destroy; /* callbacks or coros to notify on destroy */
232 AV *status; /* the exit status list */
233
234 /* async_pool */
235 SV *saved_deffh;
236 SV *invoke_cb;
237 AV *invoke_av;
238
239 /* on_enter/on_leave */
240 AV *on_enter;
241 AV *on_leave;
242
243 /* swap_sv */
244 AV *swap_sv;
245
246 /* times */
247 coro_ts t_cpu, t_real;
193 248
194 /* linked list */ 249 /* linked list */
195 struct coro *next, *prev; 250 struct coro *next, *prev;
196 HV *hv; /* the perl hash associated with this coro, if any */
197}; 251};
198 252
199typedef struct coro *Coro__State; 253typedef struct coro *Coro__State;
200typedef struct coro *Coro__State_or_hashref; 254typedef struct coro *Coro__State_or_hashref;
201 255
256/* the following variables are effectively part of the perl context */
257/* and get copied between struct coro and these variables */
258/* the main reason we don't support windows process emulation */
259static struct CoroSLF slf_frame; /* the current slf frame */
260
202/** Coro ********************************************************************/ 261/** Coro ********************************************************************/
203 262
204#define PRIO_MAX 3 263#define CORO_PRIO_MAX 3
205#define PRIO_HIGH 1 264#define CORO_PRIO_HIGH 1
206#define PRIO_NORMAL 0 265#define CORO_PRIO_NORMAL 0
207#define PRIO_LOW -1 266#define CORO_PRIO_LOW -1
208#define PRIO_IDLE -3 267#define CORO_PRIO_IDLE -3
209#define PRIO_MIN -4 268#define CORO_PRIO_MIN -4
210 269
211/* for Coro.pm */ 270/* for Coro.pm */
212static SV *coro_current; 271static SV *coro_current;
213static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 272static SV *coro_readyhook;
214static int coro_nready; 273static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
274static CV *cv_coro_run;
215static struct coro *coro_first; 275static struct coro *coro_first;
276#define coro_nready coroapi.nready
277
278/** JIT *********************************************************************/
279
280#if CORO_JIT
281 /* APPLE doesn't have mmap though */
282 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
283 #ifndef CORO_JIT_TYPE
284 #if ECB_AMD64 && CORO_JIT_UNIXY
285 #define CORO_JIT_TYPE "amd64-unix"
286 #elif __i386 && CORO_JIT_UNIXY
287 #define CORO_JIT_TYPE "x86-unix"
288 #endif
289 #endif
290#endif
291
292#if !defined(CORO_JIT_TYPE) || _POSIX_MEMORY_PROTECTION <= 0
293 #undef CORO_JIT
294#endif
295
296#if CORO_JIT
297 typedef void (*load_save_perl_slots_type)(perl_slots *);
298 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
299#endif
300
301/** Coro::Select ************************************************************/
302
303static OP *(*coro_old_pp_sselect) (pTHX);
304static SV *coro_select_select;
305
306/* horrible hack, but if it works... */
307static OP *
308coro_pp_sselect (pTHX)
309{
310 dSP;
311 PUSHMARK (SP - 4); /* fake argument list */
312 XPUSHs (coro_select_select);
313 PUTBACK;
314
315 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
316 PL_op->op_flags |= OPf_STACKED;
317 PL_op->op_private = 0;
318 return PL_ppaddr [OP_ENTERSUB](aTHX);
319}
320
321/** time stuff **************************************************************/
322
323#ifdef HAS_GETTIMEOFDAY
324
325ecb_inline void
326coro_u2time (pTHX_ UV ret[2])
327{
328 struct timeval tv;
329 gettimeofday (&tv, 0);
330
331 ret [0] = tv.tv_sec;
332 ret [1] = tv.tv_usec;
333}
334
335ecb_inline double
336coro_nvtime (void)
337{
338 struct timeval tv;
339 gettimeofday (&tv, 0);
340
341 return tv.tv_sec + tv.tv_usec * 1e-6;
342}
343
344ecb_inline void
345time_init (pTHX)
346{
347 nvtime = coro_nvtime;
348 u2time = coro_u2time;
349}
350
351#else
352
353ecb_inline void
354time_init (pTHX)
355{
356 SV **svp;
357
358 require_pv ("Time/HiRes.pm");
359
360 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
361
362 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
363 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
364
365 nvtime = INT2PTR (double (*)(), SvIV (*svp));
366
367 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
368 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
369}
370
371#endif
216 372
217/** lowlevel stuff **********************************************************/ 373/** lowlevel stuff **********************************************************/
218 374
219static AV * 375static SV * ecb_noinline
376coro_get_sv (pTHX_ const char *name, int create)
377{
378#if PERL_VERSION_ATLEAST (5,10,0)
379 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
380 get_sv (name, create);
381#endif
382 return get_sv (name, create);
383}
384
385static AV * ecb_noinline
386coro_get_av (pTHX_ const char *name, int create)
387{
388#if PERL_VERSION_ATLEAST (5,10,0)
389 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
390 get_av (name, create);
391#endif
392 return get_av (name, create);
393}
394
395static HV * ecb_noinline
396coro_get_hv (pTHX_ const char *name, int create)
397{
398#if PERL_VERSION_ATLEAST (5,10,0)
399 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
400 get_hv (name, create);
401#endif
402 return get_hv (name, create);
403}
404
405ecb_inline void
406coro_times_update (void)
407{
408#ifdef coro_clock_gettime
409 struct timespec ts;
410
411 ts.tv_sec = ts.tv_nsec = 0;
412 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
413 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
414
415 ts.tv_sec = ts.tv_nsec = 0;
416 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
417 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
418#else
419 dTHX;
420 UV tv[2];
421
422 u2time (aTHX_ tv);
423 time_real [0] = tv [0];
424 time_real [1] = tv [1] * 1000;
425#endif
426}
427
428ecb_inline void
429coro_times_add (struct coro *c)
430{
431 c->t_real [1] += time_real [1];
432 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
433 c->t_real [0] += time_real [0];
434
435 c->t_cpu [1] += time_cpu [1];
436 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
437 c->t_cpu [0] += time_cpu [0];
438}
439
440ecb_inline void
441coro_times_sub (struct coro *c)
442{
443 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
444 c->t_real [1] -= time_real [1];
445 c->t_real [0] -= time_real [0];
446
447 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
448 c->t_cpu [1] -= time_cpu [1];
449 c->t_cpu [0] -= time_cpu [0];
450}
451
452/*****************************************************************************/
453/* magic glue */
454
455#define CORO_MAGIC_type_cv 26
456#define CORO_MAGIC_type_state PERL_MAGIC_ext
457
458#define CORO_MAGIC_NN(sv, type) \
459 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
460 ? SvMAGIC (sv) \
461 : mg_find (sv, type))
462
463#define CORO_MAGIC(sv, type) \
464 (ecb_expect_true (SvMAGIC (sv)) \
465 ? CORO_MAGIC_NN (sv, type) \
466 : 0)
467
468#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
469#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
470
471ecb_inline MAGIC *
472SvSTATEhv_p (pTHX_ SV *coro)
473{
474 MAGIC *mg;
475
476 if (ecb_expect_true (
477 SvTYPE (coro) == SVt_PVHV
478 && (mg = CORO_MAGIC_state (coro))
479 && mg->mg_virtual == &coro_state_vtbl
480 ))
481 return mg;
482
483 return 0;
484}
485
486ecb_inline struct coro *
487SvSTATE_ (pTHX_ SV *coro)
488{
489 MAGIC *mg;
490
491 if (SvROK (coro))
492 coro = SvRV (coro);
493
494 mg = SvSTATEhv_p (aTHX_ coro);
495 if (!mg)
496 croak ("Coro::State object required");
497
498 return (struct coro *)mg->mg_ptr;
499}
500
501#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
502
503/* faster than SvSTATE, but expects a coroutine hv */
504#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
505#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
506
507/*****************************************************************************/
508/* padlist management and caching */
509
510ecb_inline PADLIST *
220coro_clone_padlist (pTHX_ CV *cv) 511coro_derive_padlist (pTHX_ CV *cv)
221{ 512{
222 AV *padlist = CvPADLIST (cv); 513 PADLIST *padlist = CvPADLIST (cv);
223 AV *newpadlist, *newpad; 514 PADLIST *newpadlist;
515 PAD *newpad;
516 PADOFFSET off = PadlistMAX (padlist) + 1;
224 517
225 newpadlist = newAV (); 518#if NEWPADAPI
519
520 while (!PadlistARRAY (padlist)[off - 1])
521 --off;
522
523 Perl_pad_push (aTHX_ padlist, off);
524
525 newpad = PadlistARRAY (padlist)[off];
526 PadlistARRAY (padlist)[off] = 0;
527
528#else
529
530#if PERL_VERSION_ATLEAST (5,10,0)
531 Perl_pad_push (aTHX_ padlist, off);
532#else
533 Perl_pad_push (aTHX_ padlist, off, 1);
534#endif
535
536 newpad = PadlistARRAY (padlist)[off];
537 PadlistMAX (padlist) = off - 1;
538
539#endif
540
541 newPADLIST (newpadlist);
542#if !PERL_VERSION_ATLEAST(5,15,3)
543 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
226 AvREAL_off (newpadlist); 544 AvREAL_off (newpadlist);
227#if PERL_VERSION_ATLEAST (5,9,0) 545#endif
228 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 546
547 /* Already extended to 2 elements by newPADLIST. */
548 PadlistMAX (newpadlist) = 1;
549 PadlistNAMES (newpadlist) = (PADNAMELIST *)SvREFCNT_inc_NN (PadlistNAMES (padlist));
550 PadlistARRAY (newpadlist)[1] = newpad;
551
552 return newpadlist;
553}
554
555ecb_inline void
556free_padlist (pTHX_ PADLIST *padlist)
557{
558 /* may be during global destruction */
559 if (!IN_DESTRUCT)
560 {
561 I32 i = PadlistMAX (padlist);
562
563 while (i > 0) /* special-case index 0 */
564 {
565 /* we try to be extra-careful here */
566 PAD *pad = PadlistARRAY (padlist)[i--];
567 I32 j = PadMAX (pad);
568
569 while (j >= 0)
570 SvREFCNT_dec (PadARRAY (pad)[j--]);
571
572 PadMAX (pad) = -1;
573 SvREFCNT_dec (pad);
574 }
575
576 SvREFCNT_dec (PadlistNAMES (padlist));
577
578#if NEWPADAPI
579 Safefree (PadlistARRAY (padlist));
580 Safefree (padlist);
229#else 581#else
230 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
231#endif
232 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
233 --AvFILLp (padlist);
234
235 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
236 av_store (newpadlist, 1, (SV *)newpad);
237
238 return newpadlist;
239}
240
241static void
242free_padlist (pTHX_ AV *padlist)
243{
244 /* may be during global destruction */
245 if (SvREFCNT (padlist))
246 {
247 I32 i = AvFILLp (padlist); 582 AvFILLp (padlist) = -1;
248 while (i >= 0) 583 AvREAL_off (padlist);
249 {
250 SV **svp = av_fetch (padlist, i--, FALSE);
251 if (svp)
252 {
253 SV *sv;
254 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
255 SvREFCNT_dec (sv);
256
257 SvREFCNT_dec (*svp);
258 }
259 }
260
261 SvREFCNT_dec ((SV*)padlist); 584 SvREFCNT_dec ((SV*)padlist);
585#endif
262 } 586 }
263} 587}
264 588
265static int 589static int
266coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 590coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
267{ 591{
268 AV *padlist; 592 PADLIST *padlist;
269 AV *av = (AV *)mg->mg_obj; 593 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
594 size_t len = *(size_t *)mg->mg_ptr;
270 595
271 /* casting is fun. */ 596 /* perl manages to free our internal AV and _then_ call us */
272 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 597 if (IN_DESTRUCT)
598 return 0;
599
600 while (len--)
273 free_padlist (aTHX_ padlist); 601 free_padlist (aTHX_ padlists[len]);
274
275 SvREFCNT_dec (av);
276 602
277 return 0; 603 return 0;
278} 604}
279 605
280#define PERL_MAGIC_coro PERL_MAGIC_ext 606static MGVTBL coro_cv_vtbl = {
281 607 0, 0, 0, 0,
282static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 608 coro_cv_free
283 609};
284#define CORO_MAGIC(cv) \
285 SvMAGIC (cv) \
286 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
287 ? SvMAGIC (cv) \
288 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
289 : 0
290 610
291/* the next two functions merely cache the padlists */ 611/* the next two functions merely cache the padlists */
292static void 612ecb_inline void
293get_padlist (pTHX_ CV *cv) 613get_padlist (pTHX_ CV *cv)
294{ 614{
295 MAGIC *mg = CORO_MAGIC (cv); 615 MAGIC *mg = CORO_MAGIC_cv (cv);
296 AV *av; 616 size_t *lenp;
297 617
298 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 618 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
299 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 619 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
300 else 620 else
301 { 621 {
302#if CORO_PREFER_PERL_FUNCTIONS 622#if CORO_PREFER_PERL_FUNCTIONS
303 /* this is probably cleaner, but also slower? */ 623 /* this is probably cleaner? but also slower! */
624 /* in practise, it seems to be less stable */
304 CV *cp = Perl_cv_clone (cv); 625 CV *cp = Perl_cv_clone (aTHX_ cv);
305 CvPADLIST (cv) = CvPADLIST (cp); 626 CvPADLIST (cv) = CvPADLIST (cp);
306 CvPADLIST (cp) = 0; 627 CvPADLIST (cp) = 0;
307 SvREFCNT_dec (cp); 628 SvREFCNT_dec (cp);
308#else 629#else
309 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 630 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
310#endif 631#endif
311 } 632 }
312} 633}
313 634
314static void 635ecb_inline void
315put_padlist (pTHX_ CV *cv) 636put_padlist (pTHX_ CV *cv)
316{ 637{
317 MAGIC *mg = CORO_MAGIC (cv); 638 MAGIC *mg = CORO_MAGIC_cv (cv);
318 AV *av;
319 639
320 if (!mg) 640 if (ecb_expect_false (!mg))
321 {
322 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
323 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
324 mg->mg_virtual = &vtbl_coro;
325 mg->mg_obj = (SV *)newAV ();
326 } 641 {
642 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
643 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
644 mg->mg_len = 1; /* so mg_free frees mg_ptr */
645 }
646 else
647 Renew (mg->mg_ptr,
648 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
649 char);
327 650
328 av = (AV *)mg->mg_obj; 651 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
329
330 if (AvFILLp (av) >= AvMAX (av))
331 av_extend (av, AvMAX (av) + 1);
332
333 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
334} 652}
335 653
336/** load & save, init *******************************************************/ 654/** load & save, init *******************************************************/
337 655
338#define SB do { 656ecb_inline void
339#define SE } while (0) 657swap_sv (SV *a, SV *b)
658{
659 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
660 SV tmp;
340 661
341#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE 662 /* swap sv_any */
663 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
664
665 /* swap sv_flags */
666 SvFLAGS (&tmp) = SvFLAGS (a);
667 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
668 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
669
670#if PERL_VERSION_ATLEAST (5,10,0)
671 /* perl 5.10 and later complicates this _quite_ a bit, but it also
672 * is much faster, so no quarrels here. alternatively, we could
673 * sv_upgrade to avoid this.
674 */
675 {
676 /* swap sv_u */
677 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
678
679 /* if SvANY points to the head, we need to adjust the pointers,
680 * as the pointer for a still points to b, and maybe vice versa.
681 */
682 #define svany_in_head(type) \
683 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
684
685 if (svany_in_head (SvTYPE (a)))
686 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
687
688 if (svany_in_head (SvTYPE (b)))
689 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
690 }
691#endif
692}
693
694/* swap sv heads, at least logically */
695static void
696swap_svs (pTHX_ Coro__State c)
697{
698 int i;
699
700 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
701 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
702}
703
704#define SWAP_SVS(coro) \
705 if (ecb_expect_false ((coro)->swap_sv)) \
706 swap_svs (aTHX_ (coro))
707
708static void
709on_enterleave_call (pTHX_ SV *cb);
342 710
343static void 711static void
344load_perl (pTHX_ Coro__State c) 712load_perl (pTHX_ Coro__State c)
345{ 713{
346#define VAR(name,type) PL_ ## name = c->name; 714 perl_slots *slot = c->slot;
715 c->slot = 0;
716
717 PL_mainstack = c->mainstack;
718
719#if CORO_JIT
720 load_perl_slots (slot);
721#else
722 #define VARx(name,expr,type) expr = slot->name;
347# include "state.h" 723 #include "state.h"
348#undef VAR 724#endif
349
350 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
351 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
352 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
353 if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
354
355 if (c->irssv)
356 {
357 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
358 {
359 SvREFCNT_dec (c->irssv);
360 c->irssv = 0;
361 }
362 else
363 {
364 REPLACE_SV (PL_rs, c->irssv);
365 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
366 sv_setsv (c->irssv_sv, PL_rs);
367 }
368 }
369 725
370 { 726 {
371 dSP; 727 dSP;
728
372 CV *cv; 729 CV *cv;
373 730
374 /* now do the ugly restore mess */ 731 /* now do the ugly restore mess */
375 while ((cv = (CV *)POPs)) 732 while (ecb_expect_true (cv = (CV *)POPs))
376 { 733 {
377 put_padlist (aTHX_ cv); /* mark this padlist as available */ 734 put_padlist (aTHX_ cv); /* mark this padlist as available */
378 CvDEPTH (cv) = PTR2IV (POPs); 735 CvDEPTH (cv) = PTR2IV (POPs);
379 CvPADLIST (cv) = (AV *)POPs; 736 CvPADLIST (cv) = (PADLIST *)POPs;
380 } 737 }
381 738
382 PUTBACK; 739 PUTBACK;
383 } 740 }
741
742 slf_frame = c->slf_frame;
743 CORO_THROW = c->except;
744
745 if (ecb_expect_false (enable_times))
746 {
747 if (ecb_expect_false (!times_valid))
748 coro_times_update ();
749
750 coro_times_sub (c);
751 }
752
753 if (ecb_expect_false (c->on_enter))
754 {
755 int i;
756
757 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
758 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
759 }
760
761 SWAP_SVS (c);
384} 762}
385 763
386static void 764static void
387save_perl (pTHX_ Coro__State c) 765save_perl (pTHX_ Coro__State c)
388{ 766{
767 SWAP_SVS (c);
768
769 if (ecb_expect_false (c->on_leave))
770 {
771 int i;
772
773 for (i = AvFILLp (c->on_leave); i >= 0; --i)
774 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
775 }
776
777 times_valid = 0;
778
779 if (ecb_expect_false (enable_times))
780 {
781 coro_times_update (); times_valid = 1;
782 coro_times_add (c);
783 }
784
785 c->except = CORO_THROW;
786 c->slf_frame = slf_frame;
787
389 { 788 {
390 dSP; 789 dSP;
391 I32 cxix = cxstack_ix; 790 I32 cxix = cxstack_ix;
392 PERL_CONTEXT *ccstk = cxstack; 791 PERL_CONTEXT *ccstk = cxstack;
393 PERL_SI *top_si = PL_curstackinfo; 792 PERL_SI *top_si = PL_curstackinfo;
… …
395 /* 794 /*
396 * the worst thing you can imagine happens first - we have to save 795 * the worst thing you can imagine happens first - we have to save
397 * (and reinitialize) all cv's in the whole callchain :( 796 * (and reinitialize) all cv's in the whole callchain :(
398 */ 797 */
399 798
400 EXTEND (SP, 3 + 1);
401 PUSHs (Nullsv); 799 XPUSHs (Nullsv);
402 /* this loop was inspired by pp_caller */ 800 /* this loop was inspired by pp_caller */
403 for (;;) 801 for (;;)
404 { 802 {
405 while (cxix >= 0) 803 while (ecb_expect_true (cxix >= 0))
406 { 804 {
407 PERL_CONTEXT *cx = &ccstk[cxix--]; 805 PERL_CONTEXT *cx = &ccstk[cxix--];
408 806
409 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT) 807 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
410 { 808 {
411 CV *cv = cx->blk_sub.cv; 809 CV *cv = cx->blk_sub.cv;
412 810
413 if (CvDEPTH (cv)) 811 if (ecb_expect_true (CvDEPTH (cv)))
414 { 812 {
415 EXTEND (SP, 3); 813 EXTEND (SP, 3);
416 PUSHs ((SV *)CvPADLIST (cv)); 814 PUSHs ((SV *)CvPADLIST (cv));
417 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 815 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
418 PUSHs ((SV *)cv); 816 PUSHs ((SV *)cv);
419 817
420 CvDEPTH (cv) = 0; 818 CvDEPTH (cv) = 0;
421 get_padlist (aTHX_ cv); 819 get_padlist (aTHX_ cv);
422 } 820 }
423 } 821 }
424 } 822 }
425 823
426 if (top_si->si_type == PERLSI_MAIN) 824 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
427 break; 825 break;
428 826
429 top_si = top_si->si_prev; 827 top_si = top_si->si_prev;
430 ccstk = top_si->si_cxstack; 828 ccstk = top_si->si_cxstack;
431 cxix = top_si->si_cxix; 829 cxix = top_si->si_cxix;
432 } 830 }
433 831
434 PUTBACK; 832 PUTBACK;
435 } 833 }
436 834
437 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 835 /* allocate some space on the context stack for our purposes */
438 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 836 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
439 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 837 {
440 c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0; 838 unsigned int i;
441 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
442 839
443#define VAR(name,type)c->name = PL_ ## name; 840 for (i = 0; i < SLOT_COUNT; ++i)
841 CXINC;
842
843 cxstack_ix -= SLOT_COUNT; /* undo allocation */
844 }
845
846 c->mainstack = PL_mainstack;
847
848 {
849 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
850
851#if CORO_JIT
852 save_perl_slots (slot);
853#else
854 #define VARx(name,expr,type) slot->name = expr;
444# include "state.h" 855 #include "state.h"
445#undef VAR 856#endif
857 }
446} 858}
447 859
448/* 860/*
449 * allocate various perl stacks. This is an exact copy 861 * allocate various perl stacks. This is almost an exact copy
450 * of perl.c:init_stacks, except that it uses less memory 862 * of perl.c:init_stacks, except that it uses less memory
451 * on the (sometimes correct) assumption that coroutines do 863 * on the (sometimes correct) assumption that coroutines do
452 * not usually need a lot of stackspace. 864 * not usually need a lot of stackspace.
453 */ 865 */
454#if CORO_PREFER_PERL_FUNCTIONS 866#if CORO_PREFER_PERL_FUNCTIONS
455# define coro_init_stacks init_stacks 867# define coro_init_stacks(thx) init_stacks ()
456#else 868#else
457static void 869static void
458coro_init_stacks (pTHX) 870coro_init_stacks (pTHX)
459{ 871{
460 PL_curstackinfo = new_stackinfo(64, 6); 872 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
461 PL_curstackinfo->si_type = PERLSI_MAIN; 873 PL_curstackinfo->si_type = PERLSI_MAIN;
462 PL_curstack = PL_curstackinfo->si_stack; 874 PL_curstack = PL_curstackinfo->si_stack;
463 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 875 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
464 876
465 PL_stack_base = AvARRAY(PL_curstack); 877 PL_stack_base = AvARRAY(PL_curstack);
466 PL_stack_sp = PL_stack_base; 878 PL_stack_sp = PL_stack_base;
467 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 879 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
468 880
469 New(50,PL_tmps_stack,64,SV*); 881 New(50,PL_tmps_stack,32,SV*);
470 PL_tmps_floor = -1; 882 PL_tmps_floor = -1;
471 PL_tmps_ix = -1; 883 PL_tmps_ix = -1;
472 PL_tmps_max = 64; 884 PL_tmps_max = 32;
473 885
474 New(54,PL_markstack,16,I32); 886 New(54,PL_markstack,16,I32);
475 PL_markstack_ptr = PL_markstack; 887 PL_markstack_ptr = PL_markstack;
476 PL_markstack_max = PL_markstack + 16; 888 PL_markstack_max = PL_markstack + 16;
477 889
478#ifdef SET_MARK_OFFSET 890#ifdef SET_MARK_OFFSET
479 SET_MARK_OFFSET; 891 SET_MARK_OFFSET;
480#endif 892#endif
481 893
482 New(54,PL_scopestack,16,I32); 894 New(54,PL_scopestack,8,I32);
483 PL_scopestack_ix = 0; 895 PL_scopestack_ix = 0;
484 PL_scopestack_max = 16; 896 PL_scopestack_max = 8;
897#if HAS_SCOPESTACK_NAME
898 New(54,PL_scopestack_name,8,const char*);
899#endif
485 900
486 New(54,PL_savestack,64,ANY); 901 New(54,PL_savestack,24,ANY);
487 PL_savestack_ix = 0; 902 PL_savestack_ix = 0;
488 PL_savestack_max = 64; 903 PL_savestack_max = 24;
489 904
490#if !PERL_VERSION_ATLEAST (5,9,0) 905#if !PERL_VERSION_ATLEAST (5,10,0)
491 New(54,PL_retstack,4,OP*); 906 New(54,PL_retstack,4,OP*);
492 PL_retstack_ix = 0; 907 PL_retstack_ix = 0;
493 PL_retstack_max = 4; 908 PL_retstack_max = 4;
494#endif 909#endif
495} 910}
… …
497 912
498/* 913/*
499 * destroy the stacks, the callchain etc... 914 * destroy the stacks, the callchain etc...
500 */ 915 */
501static void 916static void
502coro_destroy_stacks (pTHX) 917coro_destruct_stacks (pTHX)
503{ 918{
504 if (!IN_DESTRUCT)
505 {
506 /* restore all saved variables and stuff */
507 LEAVE_SCOPE (0);
508 assert (PL_tmps_floor == -1);
509
510 /* free all temporaries */
511 FREETMPS;
512 assert (PL_tmps_ix == -1);
513
514 /* unwind all extra stacks */
515 POPSTACK_TO (PL_mainstack);
516
517 /* unwind main stack */
518 dounwind (-1);
519 }
520
521 while (PL_curstackinfo->si_next) 919 while (PL_curstackinfo->si_next)
522 PL_curstackinfo = PL_curstackinfo->si_next; 920 PL_curstackinfo = PL_curstackinfo->si_next;
523 921
524 while (PL_curstackinfo) 922 while (PL_curstackinfo)
525 { 923 {
… …
534 } 932 }
535 933
536 Safefree (PL_tmps_stack); 934 Safefree (PL_tmps_stack);
537 Safefree (PL_markstack); 935 Safefree (PL_markstack);
538 Safefree (PL_scopestack); 936 Safefree (PL_scopestack);
937#if HAS_SCOPESTACK_NAME
938 Safefree (PL_scopestack_name);
939#endif
539 Safefree (PL_savestack); 940 Safefree (PL_savestack);
540#if !PERL_VERSION_ATLEAST (5,9,0) 941#if !PERL_VERSION_ATLEAST (5,10,0)
541 Safefree (PL_retstack); 942 Safefree (PL_retstack);
542#endif 943#endif
543} 944}
544 945
946#define CORO_RSS \
947 rss += sizeof (SYM (curstackinfo)); \
948 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
949 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
950 rss += SYM (tmps_max) * sizeof (SV *); \
951 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
952 rss += SYM (scopestack_max) * sizeof (I32); \
953 rss += SYM (savestack_max) * sizeof (ANY);
954
545static size_t 955static size_t
546coro_rss (struct coro *coro) 956coro_rss (pTHX_ struct coro *coro)
547{ 957{
548 size_t rss = sizeof (coro); 958 size_t rss = sizeof (*coro);
549 959
550 if (coro->mainstack) 960 if (coro->mainstack)
551 { 961 {
552 if (coro->flags & CF_RUNNING) 962 if (coro->flags & CF_RUNNING)
553 { 963 {
554 #define VAR(name,type)coro->name = PL_ ## name; 964 #define SYM(sym) PL_ ## sym
555 # include "state.h" 965 CORO_RSS;
556 #undef VAR 966 #undef SYM
557 } 967 }
558 968 else
559 rss += sizeof (coro->curstackinfo); 969 {
560 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *); 970 #define SYM(sym) coro->slot->sym
561 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 971 CORO_RSS;
562 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *); 972 #undef SYM
563 rss += coro->tmps_max * sizeof (SV *); 973 }
564 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
565 rss += coro->scopestack_max * sizeof (I32);
566 rss += coro->savestack_max * sizeof (ANY);
567
568#if !PERL_VERSION_ATLEAST (5,9,0)
569 rss += coro->retstack_max * sizeof (OP *);
570#endif
571 } 974 }
572 975
573 return rss; 976 return rss;
574} 977}
575 978
576/** coroutine stack handling ************************************************/ 979/** coroutine stack handling ************************************************/
577 980
981static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
982static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
983static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
984
985/* apparently < 5.8.8 */
986#ifndef MgPV_nolen_const
987#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
988 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
989 (const char*)(mg)->mg_ptr)
990#endif
991
992/*
993 * This overrides the default magic get method of %SIG elements.
994 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
995 * and instead of trying to save and restore the hash elements (extremely slow),
996 * we just provide our own readback here.
997 */
998static int ecb_cold
999coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
1000{
1001 const char *s = MgPV_nolen_const (mg);
1002
1003 if (*s == '_')
1004 {
1005 SV **svp = 0;
1006
1007 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1008 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1009
1010 if (svp)
1011 {
1012 SV *ssv;
1013
1014 if (!*svp)
1015 ssv = &PL_sv_undef;
1016 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1017 ssv = sv_2mortal (newRV_inc (*svp));
1018 else
1019 ssv = *svp;
1020
1021 sv_setsv (sv, ssv);
1022 return 0;
1023 }
1024 }
1025
1026 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1027}
1028
1029static int ecb_cold
1030coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1031{
1032 const char *s = MgPV_nolen_const (mg);
1033
1034 if (*s == '_')
1035 {
1036 SV **svp = 0;
1037
1038 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1039 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1040
1041 if (svp)
1042 {
1043 SV *old = *svp;
1044 *svp = 0;
1045 SvREFCNT_dec (old);
1046 return 0;
1047 }
1048 }
1049
1050 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1051}
1052
1053static int ecb_cold
1054coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1055{
1056 const char *s = MgPV_nolen_const (mg);
1057
1058 if (*s == '_')
1059 {
1060 SV **svp = 0;
1061
1062 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1063 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1064
1065 if (svp)
1066 {
1067 SV *old = *svp;
1068 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1069 SvREFCNT_dec (old);
1070 return 0;
1071 }
1072 }
1073
1074 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1075}
1076
1077static void
1078prepare_nop (pTHX_ struct coro_transfer_args *ta)
1079{
1080 /* kind of mega-hacky, but works */
1081 ta->next = ta->prev = (struct coro *)ta;
1082}
1083
578static void 1084static int
1085slf_check_nop (pTHX_ struct CoroSLF *frame)
1086{
1087 return 0;
1088}
1089
1090static int
1091slf_check_repeat (pTHX_ struct CoroSLF *frame)
1092{
1093 return 1;
1094}
1095
1096static UNOP init_perl_op;
1097
1098ecb_noinline static void /* noinline to keep it out of the transfer fast path */
579setup_coro (pTHX_ struct coro *coro) 1099init_perl (pTHX_ struct coro *coro)
580{ 1100{
581 /* 1101 /*
582 * emulate part of the perl startup here. 1102 * emulate part of the perl startup here.
583 */ 1103 */
584 coro_init_stacks (aTHX); 1104 coro_init_stacks (aTHX);
585 1105
1106 PL_runops = RUNOPS_DEFAULT;
586 PL_curcop = &PL_compiling; 1107 PL_curcop = &PL_compiling;
587 PL_in_eval = EVAL_NULL; 1108 PL_in_eval = EVAL_NULL;
588 PL_comppad = 0; 1109 PL_comppad = 0;
1110 PL_comppad_name = 0;
1111 PL_comppad_name_fill = 0;
1112 PL_comppad_name_floor = 0;
589 PL_curpm = 0; 1113 PL_curpm = 0;
1114 PL_curpad = 0;
590 PL_localizing = 0; 1115 PL_localizing = 0;
591 PL_dirty = 0;
592 PL_restartop = 0; 1116 PL_restartop = 0;
1117#if PERL_VERSION_ATLEAST (5,10,0)
1118 PL_parser = 0;
1119#endif
1120 PL_hints = 0;
1121
1122 /* recreate the die/warn hooks */
1123 PL_diehook = SvREFCNT_inc (rv_diehook);
1124 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1125
1126 GvSV (PL_defgv) = newSV (0);
1127 GvAV (PL_defgv) = coro->args; coro->args = 0;
1128 GvSV (PL_errgv) = newSV (0);
1129 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1130 GvHV (PL_hintgv) = 0;
1131 PL_rs = newSVsv (GvSV (irsgv));
1132 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
593 1133
594 { 1134 {
595 dSP; 1135 dSP;
596 LOGOP myop; 1136 UNOP myop;
597 1137
598 SvREFCNT_dec (GvAV (PL_defgv));
599 GvAV (PL_defgv) = coro->args; coro->args = 0;
600
601 Zero (&myop, 1, LOGOP); 1138 Zero (&myop, 1, UNOP);
602 myop.op_next = Nullop; 1139 myop.op_next = Nullop;
1140 myop.op_type = OP_ENTERSUB;
603 myop.op_flags = OPf_WANT_VOID; 1141 myop.op_flags = OPf_WANT_VOID;
604 1142
605 PUSHMARK (SP); 1143 PUSHMARK (SP);
606 XPUSHs (av_shift (GvAV (PL_defgv))); 1144 PUSHs ((SV *)coro->startcv);
607 PUTBACK; 1145 PUTBACK;
608 PL_op = (OP *)&myop; 1146 PL_op = (OP *)&myop;
609 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1147 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
610 SPAGAIN;
611 } 1148 }
612 1149
613 ENTER; /* necessary e.g. for dounwind */ 1150 /* this newly created coroutine might be run on an existing cctx which most
614} 1151 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1152 */
1153 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1154 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1155 slf_frame.destroy = 0;
615 1156
1157 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1158 init_perl_op.op_next = PL_op;
1159 init_perl_op.op_type = OP_ENTERSUB;
1160 init_perl_op.op_ppaddr = pp_slf;
1161 /* no flags etc. required, as an init function won't be called */
1162
1163 PL_op = (OP *)&init_perl_op;
1164
1165 /* copy throw, in case it was set before init_perl */
1166 CORO_THROW = coro->except;
1167
1168 SWAP_SVS (coro);
1169
1170 if (ecb_expect_false (enable_times))
1171 {
1172 coro_times_update ();
1173 coro_times_sub (coro);
1174 }
1175}
1176
616static void 1177static void
1178coro_unwind_stacks (pTHX)
1179{
1180 if (!IN_DESTRUCT)
1181 {
1182 /* restore all saved variables and stuff */
1183 LEAVE_SCOPE (0);
1184 assert (PL_tmps_floor == -1);
1185
1186 /* free all temporaries */
1187 FREETMPS;
1188 assert (PL_tmps_ix == -1);
1189
1190 /* unwind all extra stacks */
1191 POPSTACK_TO (PL_mainstack);
1192
1193 /* unwind main stack */
1194 dounwind (-1);
1195 }
1196}
1197
1198static void
1199destroy_perl (pTHX_ struct coro *coro)
1200{
1201 SV *svf [9];
1202
1203 {
1204 SV *old_current = SvRV (coro_current);
1205 struct coro *current = SvSTATE (old_current);
1206
1207 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1208
1209 save_perl (aTHX_ current);
1210
1211 /* this will cause transfer_check to croak on block*/
1212 SvRV_set (coro_current, (SV *)coro->hv);
1213
1214 load_perl (aTHX_ coro);
1215
1216 coro_unwind_stacks (aTHX);
1217
1218 /* restore swapped sv's */
1219 SWAP_SVS (coro);
1220
1221 coro_destruct_stacks (aTHX);
1222
1223 /* now save some sv's to be free'd later */
1224 svf [0] = GvSV (PL_defgv);
1225 svf [1] = (SV *)GvAV (PL_defgv);
1226 svf [2] = GvSV (PL_errgv);
1227 svf [3] = (SV *)PL_defoutgv;
1228 svf [4] = PL_rs;
1229 svf [5] = GvSV (irsgv);
1230 svf [6] = (SV *)GvHV (PL_hintgv);
1231 svf [7] = PL_diehook;
1232 svf [8] = PL_warnhook;
1233 assert (9 == sizeof (svf) / sizeof (*svf));
1234
1235 SvRV_set (coro_current, old_current);
1236
1237 load_perl (aTHX_ current);
1238 }
1239
1240 {
1241 unsigned int i;
1242
1243 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1244 SvREFCNT_dec (svf [i]);
1245
1246 SvREFCNT_dec (coro->saved_deffh);
1247 SvREFCNT_dec (coro->rouse_cb);
1248 SvREFCNT_dec (coro->invoke_cb);
1249 SvREFCNT_dec (coro->invoke_av);
1250 }
1251}
1252
1253ecb_inline void
617free_coro_mortal (pTHX) 1254free_coro_mortal (pTHX)
618{ 1255{
619 if (coro_mortal) 1256 if (ecb_expect_true (coro_mortal))
620 { 1257 {
621 SvREFCNT_dec (coro_mortal); 1258 SvREFCNT_dec ((SV *)coro_mortal);
622 coro_mortal = 0; 1259 coro_mortal = 0;
623 } 1260 }
624} 1261}
625 1262
626/* inject a fake call to Coro::State::_cctx_init into the execution */ 1263static int
627/* _cctx_init should be careful, as it could be called at almost any time */ 1264runops_trace (pTHX)
628/* during execution of a perl program */
629static void NOINLINE
630prepare_cctx (pTHX_ coro_cctx *cctx)
631{ 1265{
632 dSP; 1266 COP *oldcop = 0;
633 LOGOP myop; 1267 int oldcxix = -2;
634 1268
635 Zero (&myop, 1, LOGOP); 1269 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
636 myop.op_next = PL_op; 1270 {
637 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1271 PERL_ASYNC_CHECK ();
638 1272
639 PUSHMARK (SP); 1273 if (cctx_current->flags & CC_TRACE_ALL)
640 EXTEND (SP, 2); 1274 {
641 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1275 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
642 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1276 {
643 PUTBACK; 1277 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
644 PL_op = (OP *)&myop; 1278 SV **bot, **top;
645 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1279 AV *av = newAV (); /* return values */
646 SPAGAIN; 1280 SV **cb;
1281 dSP;
1282
1283 GV *gv = CvGV (cx->blk_sub.cv);
1284 SV *fullname = sv_2mortal (newSV (0));
1285 if (isGV (gv))
1286 gv_efullname3 (fullname, gv, 0);
1287
1288 bot = PL_stack_base + cx->blk_oldsp + 1;
1289 top = cx->blk_gimme == G_ARRAY ? SP + 1
1290 : cx->blk_gimme == G_SCALAR ? bot + 1
1291 : bot;
1292
1293 av_extend (av, top - bot);
1294 while (bot < top)
1295 av_push (av, SvREFCNT_inc_NN (*bot++));
1296
1297 PL_runops = RUNOPS_DEFAULT;
1298 ENTER;
1299 SAVETMPS;
1300 EXTEND (SP, 3);
1301 PUSHMARK (SP);
1302 PUSHs (&PL_sv_no);
1303 PUSHs (fullname);
1304 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1305 PUTBACK;
1306 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1307 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1308 SPAGAIN;
1309 FREETMPS;
1310 LEAVE;
1311 PL_runops = runops_trace;
1312 }
1313
1314 if (oldcop != PL_curcop)
1315 {
1316 oldcop = PL_curcop;
1317
1318 if (PL_curcop != &PL_compiling)
1319 {
1320 SV **cb;
1321
1322 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1323 {
1324 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1325
1326 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1327 {
1328 dSP;
1329 GV *gv = CvGV (cx->blk_sub.cv);
1330 SV *fullname = sv_2mortal (newSV (0));
1331
1332 if (isGV (gv))
1333 gv_efullname3 (fullname, gv, 0);
1334
1335 PL_runops = RUNOPS_DEFAULT;
1336 ENTER;
1337 SAVETMPS;
1338 EXTEND (SP, 3);
1339 PUSHMARK (SP);
1340 PUSHs (&PL_sv_yes);
1341 PUSHs (fullname);
1342 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1343 PUTBACK;
1344 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1345 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1346 SPAGAIN;
1347 FREETMPS;
1348 LEAVE;
1349 PL_runops = runops_trace;
1350 }
1351
1352 oldcxix = cxstack_ix;
1353 }
1354
1355 if (cctx_current->flags & CC_TRACE_LINE)
1356 {
1357 dSP;
1358
1359 PL_runops = RUNOPS_DEFAULT;
1360 ENTER;
1361 SAVETMPS;
1362 EXTEND (SP, 3);
1363 PL_runops = RUNOPS_DEFAULT;
1364 PUSHMARK (SP);
1365 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1366 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1367 PUTBACK;
1368 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1369 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1370 SPAGAIN;
1371 FREETMPS;
1372 LEAVE;
1373 PL_runops = runops_trace;
1374 }
1375 }
1376 }
1377 }
1378 }
1379
1380 TAINT_NOT;
1381 return 0;
1382}
1383
1384static struct CoroSLF cctx_ssl_frame;
1385
1386static void
1387slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1388{
1389 ta->prev = 0;
1390}
1391
1392static int
1393slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1394{
1395 *frame = cctx_ssl_frame;
1396
1397 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1398}
1399
1400/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1401static void ecb_noinline
1402cctx_prepare (pTHX)
1403{
1404 PL_top_env = &PL_start_env;
1405
1406 if (cctx_current->flags & CC_TRACE)
1407 PL_runops = runops_trace;
1408
1409 /* we already must be executing an SLF op, there is no other valid way
1410 * that can lead to creation of a new cctx */
1411 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1412 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1413
1414 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1415 cctx_ssl_frame = slf_frame;
1416
1417 slf_frame.prepare = slf_prepare_set_stacklevel;
1418 slf_frame.check = slf_check_set_stacklevel;
1419}
1420
1421/* the tail of transfer: execute stuff we can only do after a transfer */
1422ecb_inline void
1423transfer_tail (pTHX)
1424{
1425 free_coro_mortal (aTHX);
1426}
1427
1428/* try to exit the same way perl's main function would do */
1429/* we do not bother resetting the environment or other things *7
1430/* that are not, uhm, essential */
1431/* this obviously also doesn't work when perl is embedded */
1432static void ecb_noinline ecb_cold
1433perlish_exit (pTHX)
1434{
1435 int exitstatus = perl_destruct (PL_curinterp);
1436 perl_free (PL_curinterp);
1437 exit (exitstatus);
647} 1438}
648 1439
649/* 1440/*
650 * this is a _very_ stripped down perl interpreter ;) 1441 * this is a _very_ stripped down perl interpreter ;)
651 */ 1442 */
652static void 1443static void
653coro_run (void *arg) 1444cctx_run (void *arg)
654{ 1445{
1446#ifdef USE_ITHREADS
1447# if CORO_PTHREAD
1448 PERL_SET_CONTEXT (coro_thx);
1449# endif
1450#endif
1451 {
655 dTHX; 1452 dTHX;
656 1453
657 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1454 /* normally we would need to skip the entersub here */
658 UNLOCK; 1455 /* not doing so will re-execute it, which is exactly what we want */
1456 /* PL_nop = PL_nop->op_next */
659 1457
660 PL_top_env = &PL_start_env;
661
662 /* inject a fake subroutine call to cctx_init */ 1458 /* inject a fake subroutine call to cctx_init */
663 prepare_cctx (aTHX_ (coro_cctx *)arg); 1459 cctx_prepare (aTHX);
664 1460
1461 /* cctx_run is the alternative tail of transfer() */
1462 transfer_tail (aTHX);
1463
665 /* somebody or something will hit me for both perl_run and PL_restartop */ 1464 /* somebody or something will hit me for both perl_run and PL_restartop */
666 PL_restartop = PL_op; 1465 PL_restartop = PL_op;
667 perl_run (PL_curinterp); 1466 perl_run (PL_curinterp);
668
669 /* 1467 /*
1468 * Unfortunately, there is no way to get at the return values of the
1469 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1470 * runtime errors here, as this is just a random interpreter, not a thread.
1471 */
1472
1473 /*
670 * If perl-run returns we assume exit() was being called or the coro 1474 * If perl-run returns we assume exit() was being called or the coro
671 * fell off the end, which seems to be the only valid (non-bug) 1475 * fell off the end, which seems to be the only valid (non-bug)
672 * reason for perl_run to return. We try to exit by jumping to the 1476 * reason for perl_run to return. We try to mimic whatever perl is normally
673 * bootstrap-time "top" top_env, as we cannot restore the "main" 1477 * doing in that case. YMMV.
674 * coroutine as Coro has no such concept
675 */ 1478 */
676 PL_top_env = main_top_env; 1479 perlish_exit (aTHX);
677 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1480 }
678} 1481}
679 1482
680static coro_cctx * 1483static coro_cctx *
681cctx_new () 1484cctx_new (void)
682{ 1485{
683 coro_cctx *cctx; 1486 coro_cctx *cctx;
684 void *stack_start;
685 size_t stack_size;
686 1487
687 ++cctx_count; 1488 ++cctx_count;
688
689 Newz (0, cctx, 1, coro_cctx); 1489 New (0, cctx, 1, coro_cctx);
690 1490
691#if HAVE_MMAP 1491 cctx->gen = cctx_gen;
1492 cctx->flags = 0;
1493 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
692 1494
693 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1495 return cctx;
694 /* mmap supposedly does allocate-on-write for us */ 1496}
695 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
696 1497
697 if (cctx->sptr != (void *)-1) 1498/* create a new cctx only suitable as source */
698 { 1499static coro_cctx *
699# if CORO_STACKGUARD 1500cctx_new_empty (void)
700 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1501{
701# endif 1502 coro_cctx *cctx = cctx_new ();
702 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1503
703 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1504 cctx->stack.sptr = 0;
704 cctx->mapped = 1; 1505 coro_create (&cctx->cctx, 0, 0, 0, 0);
1506
1507 return cctx;
1508}
1509
1510/* create a new cctx suitable as destination/running a perl interpreter */
1511static coro_cctx *
1512cctx_new_run (void)
1513{
1514 coro_cctx *cctx = cctx_new ();
1515
1516 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
705 } 1517 {
706 else
707#endif
708 {
709 cctx->ssize = coro_stacksize * (long)sizeof (long);
710 New (0, cctx->sptr, coro_stacksize, long);
711
712 if (!cctx->sptr)
713 {
714 perror ("FATAL: unable to allocate stack for coroutine"); 1518 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
715 _exit (EXIT_FAILURE); 1519 _exit (EXIT_FAILURE);
716 }
717
718 stack_start = cctx->sptr;
719 stack_size = cctx->ssize;
720 } 1520 }
721 1521
722 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
723 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1522 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
724 1523
725 return cctx; 1524 return cctx;
726} 1525}
727 1526
728static void 1527static void
729cctx_destroy (coro_cctx *cctx) 1528cctx_destroy (coro_cctx *cctx)
730{ 1529{
731 if (!cctx) 1530 if (!cctx)
732 return; 1531 return;
733 1532
1533 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1534
734 --cctx_count; 1535 --cctx_count;
1536 coro_destroy (&cctx->cctx);
735 1537
736#if CORO_USE_VALGRIND 1538 coro_stack_free (&cctx->stack);
737 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
738#endif
739
740#if HAVE_MMAP
741 if (cctx->mapped)
742 munmap (cctx->sptr, cctx->ssize);
743 else
744#endif
745 Safefree (cctx->sptr);
746 1539
747 Safefree (cctx); 1540 Safefree (cctx);
748} 1541}
1542
1543/* wether this cctx should be destructed */
1544#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
749 1545
750static coro_cctx * 1546static coro_cctx *
751cctx_get (pTHX) 1547cctx_get (pTHX)
752{ 1548{
753 while (cctx_first) 1549 while (ecb_expect_true (cctx_first))
754 { 1550 {
755 coro_cctx *cctx = cctx_first; 1551 coro_cctx *cctx = cctx_first;
756 cctx_first = cctx->next; 1552 cctx_first = cctx->next;
757 --cctx_idle; 1553 --cctx_idle;
758 1554
759 if (cctx->ssize >= coro_stacksize) 1555 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
760 return cctx; 1556 return cctx;
761 1557
762 cctx_destroy (cctx); 1558 cctx_destroy (cctx);
763 } 1559 }
764 1560
765 PL_op = PL_op->op_next;
766 return cctx_new (); 1561 return cctx_new_run ();
767} 1562}
768 1563
769static void 1564static void
770cctx_put (coro_cctx *cctx) 1565cctx_put (coro_cctx *cctx)
771{ 1566{
1567 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1568
772 /* free another cctx if overlimit */ 1569 /* free another cctx if overlimit */
773 if (cctx_idle >= MAX_IDLE_CCTX) 1570 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
774 { 1571 {
775 coro_cctx *first = cctx_first; 1572 coro_cctx *first = cctx_first;
776 cctx_first = first->next; 1573 cctx_first = first->next;
777 --cctx_idle; 1574 --cctx_idle;
778 1575
779 assert (!first->inuse);
780 cctx_destroy (first); 1576 cctx_destroy (first);
781 } 1577 }
782 1578
783 ++cctx_idle; 1579 ++cctx_idle;
784 cctx->next = cctx_first; 1580 cctx->next = cctx_first;
785 cctx_first = cctx; 1581 cctx_first = cctx;
786} 1582}
787 1583
788/** coroutine switching *****************************************************/ 1584/** coroutine switching *****************************************************/
789 1585
790/* never call directly, always through the coro_state_transfer global variable */ 1586static void
791static void NOINLINE
792transfer (pTHX_ struct coro *prev, struct coro *next) 1587transfer_check (pTHX_ struct coro *prev, struct coro *next)
1588{
1589 /* TODO: throwing up here is considered harmful */
1590
1591 if (ecb_expect_true (prev != next))
1592 {
1593 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1594 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1595
1596 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1597 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1598
1599#if !PERL_VERSION_ATLEAST (5,10,0)
1600 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1601 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1602#endif
1603 }
1604}
1605
1606/* always use the TRANSFER macro */
1607static void ecb_noinline /* noinline so we have a fixed stackframe */
1608transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
793{ 1609{
794 dSTACKLEVEL; 1610 dSTACKLEVEL;
795 1611
796 /* sometimes transfer is only called to set idle_sp */ 1612 /* sometimes transfer is only called to set idle_sp */
797 if (!next) 1613 if (ecb_expect_false (!prev))
798 { 1614 {
799 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1615 cctx_current->idle_sp = STACKLEVEL;
800 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1616 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
801 }
802 else if (prev != next)
803 { 1617 }
1618 else if (ecb_expect_true (prev != next))
1619 {
804 coro_cctx *prev__cctx; 1620 coro_cctx *cctx_prev;
805 1621
806 if (prev->flags & CF_NEW) 1622 if (ecb_expect_false (prev->flags & CF_NEW))
807 { 1623 {
808 /* create a new empty context */ 1624 /* create a new empty/source context */
809 Newz (0, prev->cctx, 1, coro_cctx);
810 prev->cctx->inuse = 1;
811 prev->flags &= ~CF_NEW; 1625 prev->flags &= ~CF_NEW;
812 prev->flags |= CF_RUNNING; 1626 prev->flags |= CF_RUNNING;
813 } 1627 }
814 1628
815 /*TODO: must not croak here */
816 if (!prev->flags & CF_RUNNING)
817 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
818
819 if (next->flags & CF_RUNNING)
820 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
821
822 if (next->flags & CF_DESTROYED)
823 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
824
825 prev->flags &= ~CF_RUNNING; 1629 prev->flags &= ~CF_RUNNING;
826 next->flags |= CF_RUNNING; 1630 next->flags |= CF_RUNNING;
827 1631
828 LOCK; 1632 /* first get rid of the old state */
1633 save_perl (aTHX_ prev);
829 1634
830 if (next->flags & CF_NEW) 1635 if (ecb_expect_false (next->flags & CF_NEW))
831 { 1636 {
832 /* need to start coroutine */ 1637 /* need to start coroutine */
833 next->flags &= ~CF_NEW; 1638 next->flags &= ~CF_NEW;
834 /* first get rid of the old state */
835 save_perl (aTHX_ prev);
836 /* setup coroutine call */ 1639 /* setup coroutine call */
837 setup_coro (aTHX_ next); 1640 init_perl (aTHX_ next);
838 /* need a new stack */
839 assert (!next->cctx);
840 } 1641 }
841 else 1642 else
1643 load_perl (aTHX_ next);
1644
1645 /* possibly untie and reuse the cctx */
1646 if (ecb_expect_true (
1647 cctx_current->idle_sp == STACKLEVEL
1648 && !(cctx_current->flags & CC_TRACE)
1649 && !force_cctx
1650 ))
842 { 1651 {
843 /* coroutine already started */ 1652 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
844 save_perl (aTHX_ prev); 1653 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
845 load_perl (aTHX_ next); 1654
1655 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1656 /* without this the next cctx_get might destroy the running cctx while still in use */
1657 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1658 if (ecb_expect_true (!next->cctx))
1659 next->cctx = cctx_get (aTHX);
1660
1661 cctx_put (cctx_current);
846 } 1662 }
1663 else
1664 prev->cctx = cctx_current;
847 1665
848 prev__cctx = prev->cctx; 1666 ++next->usecount;
849 1667
850 /* possibly "free" the cctx */ 1668 cctx_prev = cctx_current;
851 if (prev__cctx->idle_sp == STACKLEVEL) 1669 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1670
1671 next->cctx = 0;
1672
1673 if (ecb_expect_false (cctx_prev != cctx_current))
852 { 1674 {
853 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1675 cctx_prev->top_env = PL_top_env;
854 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1676 PL_top_env = cctx_current->top_env;
855 1677 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
856 prev->cctx = 0;
857
858 cctx_put (prev__cctx);
859 prev__cctx->inuse = 0;
860 } 1678 }
861 1679
862 if (!next->cctx) 1680 transfer_tail (aTHX);
863 {
864 next->cctx = cctx_get (aTHX);
865 assert (!next->cctx->inuse);
866 next->cctx->inuse = 1;
867 }
868
869 if (prev__cctx != next->cctx)
870 {
871 prev__cctx->top_env = PL_top_env;
872 PL_top_env = next->cctx->top_env;
873 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
874 }
875
876 free_coro_mortal (aTHX);
877 UNLOCK;
878 } 1681 }
879} 1682}
880 1683
881struct transfer_args 1684#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
882{
883 struct coro *prev, *next;
884};
885
886#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1685#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
887 1686
888/** high level stuff ********************************************************/ 1687/** high level stuff ********************************************************/
889 1688
1689/* this function is actually Coro, not Coro::State, but we call it from here */
1690/* because it is convenient - but it hasn't been declared yet for that reason */
890static int 1691static void
1692coro_call_on_destroy (pTHX_ struct coro *coro);
1693
1694static void
891coro_state_destroy (pTHX_ struct coro *coro) 1695coro_state_destroy (pTHX_ struct coro *coro)
892{ 1696{
893 if (coro->flags & CF_DESTROYED) 1697 if (coro->flags & CF_ZOMBIE)
894 return 0; 1698 return;
895 1699
1700 slf_destroy (aTHX_ coro);
1701
896 coro->flags |= CF_DESTROYED; 1702 coro->flags |= CF_ZOMBIE;
897 1703
898 if (coro->flags & CF_READY) 1704 if (coro->flags & CF_READY)
899 { 1705 {
900 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1706 /* reduce nready, as destroying a ready coro effectively unreadies it */
901 /* alternative: look through all ready queues and remove the coro */ 1707 /* alternative: look through all ready queues and remove the coro */
902 LOCK;
903 --coro_nready; 1708 --coro_nready;
904 UNLOCK;
905 } 1709 }
906 else 1710 else
907 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1711 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
908
909 if (coro->mainstack && coro->mainstack != main_mainstack)
910 {
911 struct coro temp;
912
913 assert (!(coro->flags & CF_RUNNING));
914
915 Zero (&temp, 1, struct coro);
916 temp.save = CORO_SAVE_ALL;
917
918 if (coro->flags & CF_RUNNING)
919 croak ("FATAL: tried to destroy currently running coroutine");
920
921 save_perl (aTHX_ &temp);
922 load_perl (aTHX_ coro);
923
924 coro_destroy_stacks (aTHX);
925
926 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
927
928 coro->mainstack = 0;
929 }
930
931 cctx_destroy (coro->cctx);
932 SvREFCNT_dec (coro->args);
933 1712
934 if (coro->next) coro->next->prev = coro->prev; 1713 if (coro->next) coro->next->prev = coro->prev;
935 if (coro->prev) coro->prev->next = coro->next; 1714 if (coro->prev) coro->prev->next = coro->next;
936 if (coro == coro_first) coro_first = coro->next; 1715 if (coro == coro_first) coro_first = coro->next;
937 1716
938 return 1; 1717 if (coro->mainstack
1718 && coro->mainstack != main_mainstack
1719 && coro->slot
1720 && !PL_dirty)
1721 destroy_perl (aTHX_ coro);
1722
1723 cctx_destroy (coro->cctx);
1724 SvREFCNT_dec (coro->startcv);
1725 SvREFCNT_dec (coro->args);
1726 SvREFCNT_dec (coro->swap_sv);
1727 SvREFCNT_dec (CORO_THROW);
1728
1729 coro_call_on_destroy (aTHX_ coro);
1730
1731 /* more destruction mayhem in coro_state_free */
939} 1732}
940 1733
941static int 1734static int
942coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1735coro_state_free (pTHX_ SV *sv, MAGIC *mg)
943{ 1736{
944 struct coro *coro = (struct coro *)mg->mg_ptr; 1737 struct coro *coro = (struct coro *)mg->mg_ptr;
945 mg->mg_ptr = 0; 1738 mg->mg_ptr = 0;
946 1739
947 coro->hv = 0;
948
949 if (--coro->refcnt < 0)
950 {
951 coro_state_destroy (aTHX_ coro); 1740 coro_state_destroy (aTHX_ coro);
1741 SvREFCNT_dec (coro->on_destroy);
1742 SvREFCNT_dec (coro->status);
1743
952 Safefree (coro); 1744 Safefree (coro);
953 }
954 1745
955 return 0; 1746 return 0;
956} 1747}
957 1748
958static int 1749static int ecb_cold
959coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1750coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
960{ 1751{
961 struct coro *coro = (struct coro *)mg->mg_ptr; 1752 /* called when perl clones the current process the slow way (windows process emulation) */
962 1753 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
963 ++coro->refcnt; 1754 mg->mg_ptr = 0;
1755 mg->mg_virtual = 0;
964 1756
965 return 0; 1757 return 0;
966} 1758}
967 1759
968static MGVTBL coro_state_vtbl = { 1760static MGVTBL coro_state_vtbl = {
… …
974#else 1766#else
975# define MGf_DUP 0 1767# define MGf_DUP 0
976#endif 1768#endif
977}; 1769};
978 1770
979static struct coro *
980SvSTATE_ (pTHX_ SV *coro)
981{
982 HV *stash;
983 MAGIC *mg;
984
985 if (SvROK (coro))
986 coro = SvRV (coro);
987
988 stash = SvSTASH (coro);
989 if (stash != coro_stash && stash != coro_state_stash)
990 {
991 /* very slow, but rare, check */
992 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
993 croak ("Coro::State object required");
994 }
995
996 mg = CORO_MAGIC (coro);
997 return (struct coro *)mg->mg_ptr;
998}
999
1000#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
1001
1002static void 1771static void
1003prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1772prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1004{ 1773{
1005 ta->prev = SvSTATE (prev_sv); 1774 ta->prev = SvSTATE (prev_sv);
1006 ta->next = SvSTATE (next_sv); 1775 ta->next = SvSTATE (next_sv);
1776 TRANSFER_CHECK (*ta);
1007} 1777}
1008 1778
1009static void 1779static void
1010api_transfer (SV *prev_sv, SV *next_sv) 1780api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1781{
1782 struct coro_transfer_args ta;
1783
1784 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1785 TRANSFER (ta, 1);
1786}
1787
1788/** Coro ********************************************************************/
1789
1790ecb_inline void
1791coro_enq (pTHX_ struct coro *coro)
1792{
1793 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1794
1795 SvREFCNT_inc_NN (coro->hv);
1796
1797 coro->next_ready = 0;
1798 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1799 ready [1] = coro;
1800}
1801
1802ecb_inline struct coro *
1803coro_deq (pTHX)
1804{
1805 int prio;
1806
1807 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1808 {
1809 struct coro **ready = coro_ready [prio];
1810
1811 if (ready [0])
1812 {
1813 struct coro *coro = ready [0];
1814 ready [0] = coro->next_ready;
1815 return coro;
1816 }
1817 }
1818
1819 return 0;
1820}
1821
1822static void
1823invoke_sv_ready_hook_helper (void)
1011{ 1824{
1012 dTHX; 1825 dTHX;
1013 struct transfer_args ta; 1826 dSP;
1014 1827
1015 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1828 ENTER;
1016 TRANSFER (ta); 1829 SAVETMPS;
1830
1831 PUSHMARK (SP);
1832 PUTBACK;
1833 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1834
1835 FREETMPS;
1836 LEAVE;
1017} 1837}
1018 1838
1019static int 1839static int
1020api_save (SV *coro_sv, int new_save) 1840api_ready (pTHX_ SV *coro_sv)
1021{ 1841{
1022 dTHX;
1023 struct coro *coro = SvSTATE (coro_sv); 1842 struct coro *coro = SvSTATE (coro_sv);
1024 int old_save = coro->save;
1025
1026 if (new_save >= 0)
1027 coro->save = new_save;
1028
1029 return old_save;
1030}
1031
1032/** Coro ********************************************************************/
1033
1034static void
1035coro_enq (pTHX_ SV *coro_sv)
1036{
1037 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1038}
1039
1040static SV *
1041coro_deq (pTHX_ int min_prio)
1042{
1043 int prio = PRIO_MAX - PRIO_MIN;
1044
1045 min_prio -= PRIO_MIN;
1046 if (min_prio < 0)
1047 min_prio = 0;
1048
1049 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1050 if (AvFILLp (coro_ready [prio]) >= 0)
1051 return av_shift (coro_ready [prio]);
1052
1053 return 0;
1054}
1055
1056static int
1057api_ready (SV *coro_sv)
1058{
1059 dTHX;
1060 struct coro *coro;
1061
1062 if (SvROK (coro_sv))
1063 coro_sv = SvRV (coro_sv);
1064
1065 coro = SvSTATE (coro_sv);
1066 1843
1067 if (coro->flags & CF_READY) 1844 if (coro->flags & CF_READY)
1068 return 0; 1845 return 0;
1069 1846
1070 coro->flags |= CF_READY; 1847 coro->flags |= CF_READY;
1071 1848
1072 LOCK; 1849 coro_enq (aTHX_ coro);
1073 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1850
1074 ++coro_nready; 1851 if (!coro_nready++)
1075 UNLOCK; 1852 if (coroapi.readyhook)
1853 coroapi.readyhook ();
1076 1854
1077 return 1; 1855 return 1;
1078} 1856}
1079 1857
1080static int 1858static int
1081api_is_ready (SV *coro_sv) 1859api_is_ready (pTHX_ SV *coro_sv)
1082{ 1860{
1083 dTHX;
1084 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1861 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1085} 1862}
1086 1863
1864/* expects to own a reference to next->hv */
1865ecb_inline void
1866prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1867{
1868 SV *prev_sv = SvRV (coro_current);
1869
1870 ta->prev = SvSTATE_hv (prev_sv);
1871 ta->next = next;
1872
1873 TRANSFER_CHECK (*ta);
1874
1875 SvRV_set (coro_current, (SV *)next->hv);
1876
1877 free_coro_mortal (aTHX);
1878 coro_mortal = prev_sv;
1879}
1880
1087static void 1881static void
1088prepare_schedule (pTHX_ struct transfer_args *ta) 1882prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1089{ 1883{
1090 SV *prev_sv, *next_sv;
1091
1092 for (;;) 1884 for (;;)
1093 { 1885 {
1094 LOCK; 1886 struct coro *next = coro_deq (aTHX);
1095 next_sv = coro_deq (aTHX_ PRIO_MIN);
1096 1887
1888 if (ecb_expect_true (next))
1889 {
1890 /* cannot transfer to destroyed coros, skip and look for next */
1891 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1892 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1893 else
1894 {
1895 next->flags &= ~CF_READY;
1896 --coro_nready;
1897
1898 prepare_schedule_to (aTHX_ ta, next);
1899 break;
1900 }
1901 }
1902 else
1903 {
1097 /* nothing to schedule: call the idle handler */ 1904 /* nothing to schedule: call the idle handler */
1098 if (!next_sv) 1905 if (SvROK (sv_idle)
1906 && SvOBJECT (SvRV (sv_idle)))
1907 {
1908 if (SvRV (sv_idle) == SvRV (coro_current))
1909 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1910
1911 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1912 api_ready (aTHX_ SvRV (sv_idle));
1913 --coro_nready;
1914 }
1915 else
1916 {
1917 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1918 dSP;
1919
1920 ENTER;
1921 SAVETMPS;
1922
1923 PUSHMARK (SP);
1924 PUTBACK;
1925 call_sv (sv_idle, G_VOID | G_DISCARD);
1926
1927 FREETMPS;
1928 LEAVE;
1929 }
1930 }
1931 }
1932}
1933
1934ecb_inline void
1935prepare_cede (pTHX_ struct coro_transfer_args *ta)
1936{
1937 api_ready (aTHX_ coro_current);
1938 prepare_schedule (aTHX_ ta);
1939}
1940
1941ecb_inline void
1942prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1943{
1944 SV *prev = SvRV (coro_current);
1945
1946 if (coro_nready)
1947 {
1948 prepare_schedule (aTHX_ ta);
1949 api_ready (aTHX_ prev);
1950 }
1951 else
1952 prepare_nop (aTHX_ ta);
1953}
1954
1955static void
1956api_schedule (pTHX)
1957{
1958 struct coro_transfer_args ta;
1959
1960 prepare_schedule (aTHX_ &ta);
1961 TRANSFER (ta, 1);
1962}
1963
1964static void
1965api_schedule_to (pTHX_ SV *coro_sv)
1966{
1967 struct coro_transfer_args ta;
1968 struct coro *next = SvSTATE (coro_sv);
1969
1970 SvREFCNT_inc_NN (coro_sv);
1971 prepare_schedule_to (aTHX_ &ta, next);
1972}
1973
1974static int
1975api_cede (pTHX)
1976{
1977 struct coro_transfer_args ta;
1978
1979 prepare_cede (aTHX_ &ta);
1980
1981 if (ecb_expect_true (ta.prev != ta.next))
1982 {
1983 TRANSFER (ta, 1);
1984 return 1;
1985 }
1986 else
1987 return 0;
1988}
1989
1990static int
1991api_cede_notself (pTHX)
1992{
1993 if (coro_nready)
1994 {
1995 struct coro_transfer_args ta;
1996
1997 prepare_cede_notself (aTHX_ &ta);
1998 TRANSFER (ta, 1);
1999 return 1;
2000 }
2001 else
2002 return 0;
2003}
2004
2005static void
2006api_trace (pTHX_ SV *coro_sv, int flags)
2007{
2008 struct coro *coro = SvSTATE (coro_sv);
2009
2010 if (coro->flags & CF_RUNNING)
2011 croak ("cannot enable tracing on a running coroutine, caught");
2012
2013 if (flags & CC_TRACE)
2014 {
2015 if (!coro->cctx)
2016 coro->cctx = cctx_new_run ();
2017 else if (!(coro->cctx->flags & CC_TRACE))
2018 croak ("cannot enable tracing on coroutine with custom stack, caught");
2019
2020 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2021 }
2022 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2023 {
2024 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2025
2026 if (coro->flags & CF_RUNNING)
2027 PL_runops = RUNOPS_DEFAULT;
2028 else
2029 coro->slot->runops = RUNOPS_DEFAULT;
2030 }
2031}
2032
2033static void
2034coro_push_av (pTHX_ AV *av, I32 gimme_v)
2035{
2036 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2037 {
2038 dSP;
2039
2040 if (gimme_v == G_SCALAR)
2041 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2042 else
2043 {
2044 int i;
2045 EXTEND (SP, AvFILLp (av) + 1);
2046
2047 for (i = 0; i <= AvFILLp (av); ++i)
2048 PUSHs (AvARRAY (av)[i]);
2049 }
2050
2051 PUTBACK;
2052 }
2053}
2054
2055static void
2056coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2057{
2058 if (!coro->on_destroy)
2059 coro->on_destroy = newAV ();
2060
2061 av_push (coro->on_destroy, cb);
2062}
2063
2064static void
2065slf_destroy_join (pTHX_ struct CoroSLF *frame)
2066{
2067 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2068}
2069
2070static int
2071slf_check_join (pTHX_ struct CoroSLF *frame)
2072{
2073 struct coro *coro = (struct coro *)frame->data;
2074
2075 if (!coro->status)
2076 return 1;
2077
2078 frame->destroy = 0;
2079
2080 coro_push_av (aTHX_ coro->status, GIMME_V);
2081
2082 SvREFCNT_dec ((SV *)coro->hv);
2083
2084 return 0;
2085}
2086
2087static void
2088slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2089{
2090 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2091
2092 if (items > 1)
2093 croak ("join called with too many arguments");
2094
2095 if (coro->status)
2096 frame->prepare = prepare_nop;
2097 else
2098 {
2099 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2100 frame->prepare = prepare_schedule;
2101 }
2102
2103 frame->check = slf_check_join;
2104 frame->destroy = slf_destroy_join;
2105 frame->data = (void *)coro;
2106 SvREFCNT_inc (coro->hv);
2107}
2108
2109static void
2110coro_call_on_destroy (pTHX_ struct coro *coro)
2111{
2112 AV *od = coro->on_destroy;
2113
2114 if (!od)
2115 return;
2116
2117 coro->on_destroy = 0;
2118 sv_2mortal ((SV *)od);
2119
2120 while (AvFILLp (od) >= 0)
2121 {
2122 SV *cb = sv_2mortal (av_pop (od));
2123
2124 /* coro hv's (and only hv's at the moment) are supported as well */
2125 if (SvSTATEhv_p (aTHX_ cb))
2126 api_ready (aTHX_ cb);
2127 else
2128 {
2129 dSP; /* don't disturb outer sp */
2130 PUSHMARK (SP);
2131
2132 if (coro->status)
2133 {
2134 PUTBACK;
2135 coro_push_av (aTHX_ coro->status, G_ARRAY);
2136 SPAGAIN;
2137 }
2138
2139 PUTBACK;
2140 call_sv (cb, G_VOID | G_DISCARD);
2141 }
2142 }
2143}
2144
2145static void
2146coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2147{
2148 AV *av;
2149
2150 if (coro->status)
2151 {
2152 av = coro->status;
2153 av_clear (av);
2154 }
2155 else
2156 av = coro->status = newAV ();
2157
2158 /* items are actually not so common, so optimise for this case */
2159 if (items)
2160 {
2161 int i;
2162
2163 av_extend (av, items - 1);
2164
2165 for (i = 0; i < items; ++i)
2166 av_push (av, SvREFCNT_inc_NN (arg [i]));
2167 }
2168}
2169
2170static void
2171slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2172{
2173 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2174 api_ready (aTHX_ sv_manager);
2175
2176 frame->prepare = prepare_schedule;
2177 frame->check = slf_check_repeat;
2178
2179 /* as a minor optimisation, we could unwind all stacks here */
2180 /* but that puts extra pressure on pp_slf, and is not worth much */
2181 /*coro_unwind_stacks (aTHX);*/
2182}
2183
2184static void
2185slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2186{
2187 HV *coro_hv = (HV *)SvRV (coro_current);
2188
2189 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2190 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2191}
2192
2193static void
2194slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2195{
2196 HV *coro_hv;
2197 struct coro *coro;
2198
2199 if (items <= 0)
2200 croak ("Coro::cancel called without coro object,");
2201
2202 coro = SvSTATE (arg [0]);
2203 coro_hv = coro->hv;
2204
2205 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2206
2207 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2208 {
2209 /* coro currently busy cancelling something, so just notify it */
2210 coro->slf_frame.data = (void *)coro;
2211
2212 frame->prepare = prepare_nop;
2213 frame->check = slf_check_nop;
2214 }
2215 else if (coro_hv == (HV *)SvRV (coro_current))
2216 {
2217 /* cancelling the current coro is allowed, and equals terminate */
2218 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2219 }
2220 else
2221 {
2222 struct coro *self = SvSTATE_current;
2223
2224 /* otherwise we cancel directly, purely for speed reasons
2225 * unfortunately, this requires some magic trickery, as
2226 * somebody else could cancel us, so we have to fight the cancellation.
2227 * this is ugly, and hopefully fully worth the extra speed.
2228 * besides, I can't get the slow-but-safe version working...
2229 */
2230 slf_frame.data = 0;
2231 self->flags |= CF_NOCANCEL;
2232 coro_state_destroy (aTHX_ coro);
2233 self->flags &= ~CF_NOCANCEL;
2234
2235 if (slf_frame.data)
2236 {
2237 /* while we were busy we have been cancelled, so terminate */
2238 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2239 }
2240 else
2241 {
2242 frame->prepare = prepare_nop;
2243 frame->check = slf_check_nop;
2244 }
2245 }
2246}
2247
2248static int
2249slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2250{
2251 frame->prepare = 0;
2252 coro_unwind_stacks (aTHX);
2253
2254 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2255
2256 return 1;
2257}
2258
2259static int
2260safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2261{
2262 if (coro->cctx)
2263 croak ("coro inside C callback, unable to cancel at this time, caught");
2264
2265 if (coro->flags & CF_NEW)
2266 {
2267 coro_set_status (aTHX_ coro, arg, items);
2268 coro_state_destroy (aTHX_ coro);
2269 }
2270 else
2271 {
2272 if (!coro->slf_frame.prepare)
2273 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2274
2275 slf_destroy (aTHX_ coro);
2276
2277 coro_set_status (aTHX_ coro, arg, items);
2278 coro->slf_frame.prepare = prepare_nop;
2279 coro->slf_frame.check = slf_check_safe_cancel;
2280
2281 api_ready (aTHX_ (SV *)coro->hv);
2282 }
2283
2284 return 1;
2285}
2286
2287/*****************************************************************************/
2288/* async pool handler */
2289
2290static int
2291slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2292{
2293 HV *hv = (HV *)SvRV (coro_current);
2294 struct coro *coro = (struct coro *)frame->data;
2295
2296 if (!coro->invoke_cb)
2297 return 1; /* loop till we have invoke */
2298 else
2299 {
2300 hv_store (hv, "desc", sizeof ("desc") - 1,
2301 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2302
2303 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2304
2305 {
2306 dSP;
2307 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2308 PUTBACK;
2309 }
2310
2311 SvREFCNT_dec (GvAV (PL_defgv));
2312 GvAV (PL_defgv) = coro->invoke_av;
2313 coro->invoke_av = 0;
2314
2315 return 0;
2316 }
2317}
2318
2319static void
2320slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2321{
2322 HV *hv = (HV *)SvRV (coro_current);
2323 struct coro *coro = SvSTATE_hv ((SV *)hv);
2324
2325 if (ecb_expect_true (coro->saved_deffh))
2326 {
2327 /* subsequent iteration */
2328 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2329 coro->saved_deffh = 0;
2330
2331 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2332 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2333 {
2334 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2335 return;
2336 }
2337 else
2338 {
2339 av_clear (GvAV (PL_defgv));
2340 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2341
2342 coro->prio = 0;
2343
2344 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2345 api_trace (aTHX_ coro_current, 0);
2346
2347 frame->prepare = prepare_schedule;
2348 av_push (av_async_pool, SvREFCNT_inc (hv));
2349 }
2350 }
2351 else
2352 {
2353 /* first iteration, simply fall through */
2354 frame->prepare = prepare_nop;
2355 }
2356
2357 frame->check = slf_check_pool_handler;
2358 frame->data = (void *)coro;
2359}
2360
2361/*****************************************************************************/
2362/* rouse callback */
2363
2364#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2365
2366static void
2367coro_rouse_callback (pTHX_ CV *cv)
2368{
2369 dXSARGS;
2370 SV *data = (SV *)S_GENSUB_ARG;
2371
2372 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2373 {
2374 /* first call, set args */
2375 SV *coro = SvRV (data);
2376 AV *av = newAV ();
2377
2378 SvRV_set (data, (SV *)av);
2379
2380 /* better take a full copy of the arguments */
2381 while (items--)
2382 av_store (av, items, newSVsv (ST (items)));
2383
2384 api_ready (aTHX_ coro);
2385 SvREFCNT_dec (coro);
2386 }
2387
2388 XSRETURN_EMPTY;
2389}
2390
2391static int
2392slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2393{
2394 SV *data = (SV *)frame->data;
2395
2396 if (CORO_THROW)
2397 return 0;
2398
2399 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2400 return 1;
2401
2402 /* now push all results on the stack */
2403 {
2404 dSP;
2405 AV *av = (AV *)SvRV (data);
2406 int i;
2407
2408 EXTEND (SP, AvFILLp (av) + 1);
2409 for (i = 0; i <= AvFILLp (av); ++i)
2410 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2411
2412 /* we have stolen the elements, so set length to zero and free */
2413 AvFILLp (av) = -1;
2414 av_undef (av);
2415
2416 PUTBACK;
2417 }
2418
2419 return 0;
2420}
2421
2422static void
2423slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2424{
2425 SV *cb;
2426
2427 if (items)
2428 cb = arg [0];
2429 else
2430 {
2431 struct coro *coro = SvSTATE_current;
2432
2433 if (!coro->rouse_cb)
2434 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2435
2436 cb = sv_2mortal (coro->rouse_cb);
2437 coro->rouse_cb = 0;
2438 }
2439
2440 if (!SvROK (cb)
2441 || SvTYPE (SvRV (cb)) != SVt_PVCV
2442 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2443 croak ("Coro::rouse_wait called with illegal callback argument,");
2444
2445 {
2446 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2447 SV *data = (SV *)S_GENSUB_ARG;
2448
2449 frame->data = (void *)data;
2450 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2451 frame->check = slf_check_rouse_wait;
2452 }
2453}
2454
2455static SV *
2456coro_new_rouse_cb (pTHX)
2457{
2458 HV *hv = (HV *)SvRV (coro_current);
2459 struct coro *coro = SvSTATE_hv (hv);
2460 SV *data = newRV_inc ((SV *)hv);
2461 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2462
2463 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2464 SvREFCNT_dec (data); /* magicext increases the refcount */
2465
2466 SvREFCNT_dec (coro->rouse_cb);
2467 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2468
2469 return cb;
2470}
2471
2472/*****************************************************************************/
2473/* schedule-like-function opcode (SLF) */
2474
2475static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2476static const CV *slf_cv;
2477static SV **slf_argv;
2478static int slf_argc, slf_arga; /* count, allocated */
2479static I32 slf_ax; /* top of stack, for restore */
2480
2481/* this restores the stack in the case we patched the entersub, to */
2482/* recreate the stack frame as perl will on following calls */
2483/* since entersub cleared the stack */
2484static OP *
2485pp_restore (pTHX)
2486{
2487 int i;
2488 SV **SP = PL_stack_base + slf_ax;
2489
2490 PUSHMARK (SP);
2491
2492 EXTEND (SP, slf_argc + 1);
2493
2494 for (i = 0; i < slf_argc; ++i)
2495 PUSHs (sv_2mortal (slf_argv [i]));
2496
2497 PUSHs ((SV *)CvGV (slf_cv));
2498
2499 RETURNOP (slf_restore.op_first);
2500}
2501
2502static void
2503slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2504{
2505 SV **arg = (SV **)slf_frame.data;
2506
2507 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2508}
2509
2510static void
2511slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2512{
2513 if (items != 2)
2514 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2515
2516 frame->prepare = slf_prepare_transfer;
2517 frame->check = slf_check_nop;
2518 frame->data = (void *)arg; /* let's hope it will stay valid */
2519}
2520
2521static void
2522slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2523{
2524 frame->prepare = prepare_schedule;
2525 frame->check = slf_check_nop;
2526}
2527
2528static void
2529slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2530{
2531 struct coro *next = (struct coro *)slf_frame.data;
2532
2533 SvREFCNT_inc_NN (next->hv);
2534 prepare_schedule_to (aTHX_ ta, next);
2535}
2536
2537static void
2538slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2539{
2540 if (!items)
2541 croak ("Coro::schedule_to expects a coroutine argument, caught");
2542
2543 frame->data = (void *)SvSTATE (arg [0]);
2544 frame->prepare = slf_prepare_schedule_to;
2545 frame->check = slf_check_nop;
2546}
2547
2548static void
2549slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2550{
2551 api_ready (aTHX_ SvRV (coro_current));
2552
2553 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2554}
2555
2556static void
2557slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2558{
2559 frame->prepare = prepare_cede;
2560 frame->check = slf_check_nop;
2561}
2562
2563static void
2564slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2565{
2566 frame->prepare = prepare_cede_notself;
2567 frame->check = slf_check_nop;
2568}
2569
2570/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2571static void
2572slf_destroy (pTHX_ struct coro *coro)
2573{
2574 /* this callback is reserved for slf functions needing to do cleanup */
2575 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2576 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2577
2578 /*
2579 * The on_destroy above most likely is from an SLF call.
2580 * Since by definition the SLF call will not finish when we destroy
2581 * the coro, we will have to force-finish it here, otherwise
2582 * cleanup functions cannot call SLF functions.
2583 */
2584 coro->slf_frame.prepare = 0;
2585}
2586
2587/*
2588 * these not obviously related functions are all rolled into one
2589 * function to increase chances that they all will call transfer with the same
2590 * stack offset
2591 * SLF stands for "schedule-like-function".
2592 */
2593static OP *
2594pp_slf (pTHX)
2595{
2596 I32 checkmark; /* mark SP to see how many elements check has pushed */
2597
2598 /* set up the slf frame, unless it has already been set-up */
2599 /* the latter happens when a new coro has been started */
2600 /* or when a new cctx was attached to an existing coroutine */
2601 if (ecb_expect_true (!slf_frame.prepare))
2602 {
2603 /* first iteration */
2604 dSP;
2605 SV **arg = PL_stack_base + TOPMARK + 1;
2606 int items = SP - arg; /* args without function object */
2607 SV *gv = *sp;
2608
2609 /* do a quick consistency check on the "function" object, and if it isn't */
2610 /* for us, divert to the real entersub */
2611 if (SvTYPE (gv) != SVt_PVGV
2612 || !GvCV (gv)
2613 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2614 return PL_ppaddr[OP_ENTERSUB](aTHX);
2615
2616 if (!(PL_op->op_flags & OPf_STACKED))
2617 {
2618 /* ampersand-form of call, use @_ instead of stack */
2619 AV *av = GvAV (PL_defgv);
2620 arg = AvARRAY (av);
2621 items = AvFILLp (av) + 1;
2622 }
2623
2624 /* now call the init function, which needs to set up slf_frame */
2625 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2626 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2627
2628 /* pop args */
2629 SP = PL_stack_base + POPMARK;
2630
2631 PUTBACK;
2632 }
2633
2634 /* now that we have a slf_frame, interpret it! */
2635 /* we use a callback system not to make the code needlessly */
2636 /* complicated, but so we can run multiple perl coros from one cctx */
2637
2638 do
2639 {
2640 struct coro_transfer_args ta;
2641
2642 slf_frame.prepare (aTHX_ &ta);
2643 TRANSFER (ta, 0);
2644
2645 checkmark = PL_stack_sp - PL_stack_base;
2646 }
2647 while (slf_frame.check (aTHX_ &slf_frame));
2648
2649 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2650
2651 /* exception handling */
2652 if (ecb_expect_false (CORO_THROW))
2653 {
2654 SV *exception = sv_2mortal (CORO_THROW);
2655
2656 CORO_THROW = 0;
2657 sv_setsv (ERRSV, exception);
2658 croak (0);
2659 }
2660
2661 /* return value handling - mostly like entersub */
2662 /* make sure we put something on the stack in scalar context */
2663 if (GIMME_V == G_SCALAR
2664 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2665 {
2666 dSP;
2667 SV **bot = PL_stack_base + checkmark;
2668
2669 if (sp == bot) /* too few, push undef */
2670 bot [1] = &PL_sv_undef;
2671 else /* too many, take last one */
2672 bot [1] = *sp;
2673
2674 SP = bot + 1;
2675
2676 PUTBACK;
2677 }
2678
2679 return NORMAL;
2680}
2681
2682static void
2683api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2684{
2685 int i;
2686 SV **arg = PL_stack_base + ax;
2687 int items = PL_stack_sp - arg + 1;
2688
2689 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2690
2691 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2692 && PL_op->op_ppaddr != pp_slf)
2693 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2694
2695 CvFLAGS (cv) |= CVf_SLF;
2696 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2697 slf_cv = cv;
2698
2699 /* we patch the op, and then re-run the whole call */
2700 /* we have to put the same argument on the stack for this to work */
2701 /* and this will be done by pp_restore */
2702 slf_restore.op_next = (OP *)&slf_restore;
2703 slf_restore.op_type = OP_CUSTOM;
2704 slf_restore.op_ppaddr = pp_restore;
2705 slf_restore.op_first = PL_op;
2706
2707 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2708
2709 if (PL_op->op_flags & OPf_STACKED)
2710 {
2711 if (items > slf_arga)
2712 {
2713 slf_arga = items;
2714 Safefree (slf_argv);
2715 New (0, slf_argv, slf_arga, SV *);
2716 }
2717
2718 slf_argc = items;
2719
2720 for (i = 0; i < items; ++i)
2721 slf_argv [i] = SvREFCNT_inc (arg [i]);
2722 }
2723 else
2724 slf_argc = 0;
2725
2726 PL_op->op_ppaddr = pp_slf;
2727 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2728
2729 PL_op = (OP *)&slf_restore;
2730}
2731
2732/*****************************************************************************/
2733/* dynamic wind */
2734
2735static void
2736on_enterleave_call (pTHX_ SV *cb)
2737{
2738 dSP;
2739
2740 PUSHSTACK;
2741
2742 PUSHMARK (SP);
2743 PUTBACK;
2744 call_sv (cb, G_VOID | G_DISCARD);
2745 SPAGAIN;
2746
2747 POPSTACK;
2748}
2749
2750static SV *
2751coro_avp_pop_and_free (pTHX_ AV **avp)
2752{
2753 AV *av = *avp;
2754 SV *res = av_pop (av);
2755
2756 if (AvFILLp (av) < 0)
2757 {
2758 *avp = 0;
2759 SvREFCNT_dec (av);
2760 }
2761
2762 return res;
2763}
2764
2765static void
2766coro_pop_on_enter (pTHX_ void *coro)
2767{
2768 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2769 SvREFCNT_dec (cb);
2770}
2771
2772static void
2773coro_pop_on_leave (pTHX_ void *coro)
2774{
2775 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2776 on_enterleave_call (aTHX_ sv_2mortal (cb));
2777}
2778
2779/*****************************************************************************/
2780/* PerlIO::cede */
2781
2782typedef struct
2783{
2784 PerlIOBuf base;
2785 NV next, every;
2786} PerlIOCede;
2787
2788static IV ecb_cold
2789PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2790{
2791 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2792
2793 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2794 self->next = nvtime () + self->every;
2795
2796 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2797}
2798
2799static SV * ecb_cold
2800PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2801{
2802 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2803
2804 return newSVnv (self->every);
2805}
2806
2807static IV
2808PerlIOCede_flush (pTHX_ PerlIO *f)
2809{
2810 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2811 double now = nvtime ();
2812
2813 if (now >= self->next)
2814 {
2815 api_cede (aTHX);
2816 self->next = now + self->every;
2817 }
2818
2819 return PerlIOBuf_flush (aTHX_ f);
2820}
2821
2822static PerlIO_funcs PerlIO_cede =
2823{
2824 sizeof(PerlIO_funcs),
2825 "cede",
2826 sizeof(PerlIOCede),
2827 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2828 PerlIOCede_pushed,
2829 PerlIOBuf_popped,
2830 PerlIOBuf_open,
2831 PerlIOBase_binmode,
2832 PerlIOCede_getarg,
2833 PerlIOBase_fileno,
2834 PerlIOBuf_dup,
2835 PerlIOBuf_read,
2836 PerlIOBuf_unread,
2837 PerlIOBuf_write,
2838 PerlIOBuf_seek,
2839 PerlIOBuf_tell,
2840 PerlIOBuf_close,
2841 PerlIOCede_flush,
2842 PerlIOBuf_fill,
2843 PerlIOBase_eof,
2844 PerlIOBase_error,
2845 PerlIOBase_clearerr,
2846 PerlIOBase_setlinebuf,
2847 PerlIOBuf_get_base,
2848 PerlIOBuf_bufsiz,
2849 PerlIOBuf_get_ptr,
2850 PerlIOBuf_get_cnt,
2851 PerlIOBuf_set_ptrcnt,
2852};
2853
2854/*****************************************************************************/
2855/* Coro::Semaphore & Coro::Signal */
2856
2857static SV *
2858coro_waitarray_new (pTHX_ int count)
2859{
2860 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2861 AV *av = newAV ();
2862 SV **ary;
2863
2864 /* unfortunately, building manually saves memory */
2865 Newx (ary, 2, SV *);
2866 AvALLOC (av) = ary;
2867#if PERL_VERSION_ATLEAST (5,10,0)
2868 AvARRAY (av) = ary;
2869#else
2870 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2871 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2872 SvPVX ((SV *)av) = (char *)ary;
2873#endif
2874 AvMAX (av) = 1;
2875 AvFILLp (av) = 0;
2876 ary [0] = newSViv (count);
2877
2878 return newRV_noinc ((SV *)av);
2879}
2880
2881/* semaphore */
2882
2883static void
2884coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2885{
2886 SV *count_sv = AvARRAY (av)[0];
2887 IV count = SvIVX (count_sv);
2888
2889 count += adjust;
2890 SvIVX (count_sv) = count;
2891
2892 /* now wake up as many waiters as are expected to lock */
2893 while (count > 0 && AvFILLp (av) > 0)
2894 {
2895 SV *cb;
2896
2897 /* swap first two elements so we can shift a waiter */
2898 AvARRAY (av)[0] = AvARRAY (av)[1];
2899 AvARRAY (av)[1] = count_sv;
2900 cb = av_shift (av);
2901
2902 if (SvOBJECT (cb))
2903 {
2904 api_ready (aTHX_ cb);
2905 --count;
2906 }
2907 else if (SvTYPE (cb) == SVt_PVCV)
1099 { 2908 {
1100 dSP; 2909 dSP;
1101 UNLOCK;
1102
1103 ENTER;
1104 SAVETMPS;
1105
1106 PUSHMARK (SP); 2910 PUSHMARK (SP);
2911 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1107 PUTBACK; 2912 PUTBACK;
1108 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 2913 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1109
1110 FREETMPS;
1111 LEAVE;
1112 continue;
1113 } 2914 }
1114 2915
1115 ta->next = SvSTATE (next_sv); 2916 SvREFCNT_dec (cb);
2917 }
2918}
1116 2919
1117 /* cannot transfer to destroyed coros, skip and look for next */ 2920static void
1118 if (ta->next->flags & CF_DESTROYED) 2921coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2922{
2923 /* call $sem->adjust (0) to possibly wake up some other waiters */
2924 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2925}
2926
2927static int
2928slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2929{
2930 AV *av = (AV *)frame->data;
2931 SV *count_sv = AvARRAY (av)[0];
2932 SV *coro_hv = SvRV (coro_current);
2933
2934 /* if we are about to throw, don't actually acquire the lock, just throw */
2935 if (CORO_THROW)
2936 return 0;
2937 else if (SvIVX (count_sv) > 0)
2938 {
2939 frame->destroy = 0;
2940
2941 if (acquire)
2942 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2943 else
2944 coro_semaphore_adjust (aTHX_ av, 0);
2945
2946 return 0;
2947 }
2948 else
2949 {
2950 int i;
2951 /* if we were woken up but can't down, we look through the whole */
2952 /* waiters list and only add us if we aren't in there already */
2953 /* this avoids some degenerate memory usage cases */
2954 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
2955 if (AvARRAY (av)[i] == coro_hv)
2956 return 1;
2957
2958 av_push (av, SvREFCNT_inc (coro_hv));
2959 return 1;
2960 }
2961}
2962
2963static int
2964slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2965{
2966 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2967}
2968
2969static int
2970slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2971{
2972 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2973}
2974
2975static void
2976slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2977{
2978 AV *av = (AV *)SvRV (arg [0]);
2979
2980 if (SvIVX (AvARRAY (av)[0]) > 0)
2981 {
2982 frame->data = (void *)av;
2983 frame->prepare = prepare_nop;
2984 }
2985 else
2986 {
2987 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2988
2989 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2990 frame->prepare = prepare_schedule;
2991 /* to avoid race conditions when a woken-up coro gets terminated */
2992 /* we arrange for a temporary on_destroy that calls adjust (0) */
2993 frame->destroy = coro_semaphore_destroy;
2994 }
2995}
2996
2997static void
2998slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2999{
3000 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3001 frame->check = slf_check_semaphore_down;
3002}
3003
3004static void
3005slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3006{
3007 if (items >= 2)
3008 {
3009 /* callback form */
3010 AV *av = (AV *)SvRV (arg [0]);
3011 SV *cb_cv = s_get_cv_croak (arg [1]);
3012
3013 av_push (av, SvREFCNT_inc_NN (cb_cv));
3014
3015 if (SvIVX (AvARRAY (av)[0]) > 0)
3016 coro_semaphore_adjust (aTHX_ av, 0);
3017
3018 frame->prepare = prepare_nop;
3019 frame->check = slf_check_nop;
3020 }
3021 else
3022 {
3023 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3024 frame->check = slf_check_semaphore_wait;
3025 }
3026}
3027
3028/* signal */
3029
3030static void
3031coro_signal_wake (pTHX_ AV *av, int count)
3032{
3033 SvIVX (AvARRAY (av)[0]) = 0;
3034
3035 /* now signal count waiters */
3036 while (count > 0 && AvFILLp (av) > 0)
3037 {
3038 SV *cb;
3039
3040 /* swap first two elements so we can shift a waiter */
3041 cb = AvARRAY (av)[0];
3042 AvARRAY (av)[0] = AvARRAY (av)[1];
3043 AvARRAY (av)[1] = cb;
3044
3045 cb = av_shift (av);
3046
3047 if (SvTYPE (cb) == SVt_PVCV)
1119 { 3048 {
3049 dSP;
3050 PUSHMARK (SP);
3051 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1120 UNLOCK; 3052 PUTBACK;
1121 SvREFCNT_dec (next_sv); 3053 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1122 /* coro_nready is already taken care of by destroy */
1123 continue;
1124 } 3054 }
3055 else
3056 {
3057 api_ready (aTHX_ cb);
3058 sv_setiv (cb, 0); /* signal waiter */
3059 }
1125 3060
1126 --coro_nready; 3061 SvREFCNT_dec (cb);
1127 UNLOCK;
1128 break;
1129 }
1130 3062
1131 /* free this only after the transfer */ 3063 --count;
1132 prev_sv = SvRV (coro_current); 3064 }
1133 SvRV_set (coro_current, next_sv);
1134 ta->prev = SvSTATE (prev_sv);
1135
1136 assert (ta->next->flags & CF_READY);
1137 ta->next->flags &= ~CF_READY;
1138
1139 LOCK;
1140 free_coro_mortal (aTHX);
1141 coro_mortal = prev_sv;
1142 UNLOCK;
1143}
1144
1145static void
1146prepare_cede (pTHX_ struct transfer_args *ta)
1147{
1148 api_ready (coro_current);
1149 prepare_schedule (aTHX_ ta);
1150} 3065}
1151 3066
1152static int 3067static int
1153prepare_cede_notself (pTHX_ struct transfer_args *ta) 3068slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
1154{ 3069{
1155 if (coro_nready) 3070 /* if we are about to throw, also stop waiting */
3071 return SvROK ((SV *)frame->data) && !CORO_THROW;
3072}
3073
3074static void
3075slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3076{
3077 AV *av = (AV *)SvRV (arg [0]);
3078
3079 if (items >= 2)
3080 {
3081 SV *cb_cv = s_get_cv_croak (arg [1]);
3082 av_push (av, SvREFCNT_inc_NN (cb_cv));
3083
3084 if (SvIVX (AvARRAY (av)[0]))
3085 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3086
3087 frame->prepare = prepare_nop;
3088 frame->check = slf_check_nop;
1156 { 3089 }
1157 SV *prev = SvRV (coro_current); 3090 else if (SvIVX (AvARRAY (av)[0]))
1158 prepare_schedule (aTHX_ ta); 3091 {
1159 api_ready (prev); 3092 SvIVX (AvARRAY (av)[0]) = 0;
1160 return 1; 3093 frame->prepare = prepare_nop;
3094 frame->check = slf_check_nop;
1161 } 3095 }
1162 else 3096 else
3097 {
3098 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3099
3100 av_push (av, waiter);
3101
3102 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3103 frame->prepare = prepare_schedule;
3104 frame->check = slf_check_signal_wait;
3105 }
3106}
3107
3108/*****************************************************************************/
3109/* Coro::AIO */
3110
3111#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3112
3113/* helper storage struct */
3114struct io_state
3115{
3116 int errorno;
3117 I32 laststype; /* U16 in 5.10.0 */
3118 int laststatval;
3119 Stat_t statcache;
3120};
3121
3122static void
3123coro_aio_callback (pTHX_ CV *cv)
3124{
3125 dXSARGS;
3126 AV *state = (AV *)S_GENSUB_ARG;
3127 SV *coro = av_pop (state);
3128 SV *data_sv = newSV (sizeof (struct io_state));
3129
3130 av_extend (state, items - 1);
3131
3132 sv_upgrade (data_sv, SVt_PV);
3133 SvCUR_set (data_sv, sizeof (struct io_state));
3134 SvPOK_only (data_sv);
3135
3136 {
3137 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3138
3139 data->errorno = errno;
3140 data->laststype = PL_laststype;
3141 data->laststatval = PL_laststatval;
3142 data->statcache = PL_statcache;
3143 }
3144
3145 /* now build the result vector out of all the parameters and the data_sv */
3146 {
3147 int i;
3148
3149 for (i = 0; i < items; ++i)
3150 av_push (state, SvREFCNT_inc_NN (ST (i)));
3151 }
3152
3153 av_push (state, data_sv);
3154
3155 api_ready (aTHX_ coro);
3156 SvREFCNT_dec (coro);
3157 SvREFCNT_dec ((AV *)state);
3158}
3159
3160static int
3161slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3162{
3163 AV *state = (AV *)frame->data;
3164
3165 /* if we are about to throw, return early */
3166 /* this does not cancel the aio request, but at least */
3167 /* it quickly returns */
3168 if (CORO_THROW)
1163 return 0; 3169 return 0;
1164}
1165 3170
1166static void 3171 /* one element that is an RV? repeat! */
1167api_schedule (void) 3172 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
1168{
1169 dTHX;
1170 struct transfer_args ta;
1171
1172 prepare_schedule (aTHX_ &ta);
1173 TRANSFER (ta);
1174}
1175
1176static int
1177api_cede (void)
1178{
1179 dTHX;
1180 struct transfer_args ta;
1181
1182 prepare_cede (aTHX_ &ta);
1183
1184 if (ta.prev != ta.next)
1185 {
1186 TRANSFER (ta);
1187 return 1; 3173 return 1;
3174
3175 /* restore status */
3176 {
3177 SV *data_sv = av_pop (state);
3178 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3179
3180 errno = data->errorno;
3181 PL_laststype = data->laststype;
3182 PL_laststatval = data->laststatval;
3183 PL_statcache = data->statcache;
3184
3185 SvREFCNT_dec (data_sv);
1188 } 3186 }
1189 else 3187
3188 /* push result values */
3189 {
3190 dSP;
3191 int i;
3192
3193 EXTEND (SP, AvFILLp (state) + 1);
3194 for (i = 0; i <= AvFILLp (state); ++i)
3195 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3196
3197 PUTBACK;
3198 }
3199
1190 return 0; 3200 return 0;
1191} 3201}
1192 3202
1193static int 3203static void
1194api_cede_notself (void) 3204slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1195{ 3205{
1196 dTHX; 3206 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
1197 struct transfer_args ta; 3207 SV *coro_hv = SvRV (coro_current);
3208 struct coro *coro = SvSTATE_hv (coro_hv);
1198 3209
1199 if (prepare_cede_notself (aTHX_ &ta)) 3210 /* put our coroutine id on the state arg */
1200 { 3211 av_push (state, SvREFCNT_inc_NN (coro_hv));
1201 TRANSFER (ta); 3212
1202 return 1; 3213 /* first see whether we have a non-zero priority and set it as AIO prio */
3214 if (coro->prio)
1203 } 3215 {
1204 else 3216 dSP;
1205 return 0;
1206}
1207 3217
3218 static SV *prio_cv;
3219 static SV *prio_sv;
3220
3221 if (ecb_expect_false (!prio_cv))
3222 {
3223 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3224 prio_sv = newSViv (0);
3225 }
3226
3227 PUSHMARK (SP);
3228 sv_setiv (prio_sv, coro->prio);
3229 XPUSHs (prio_sv);
3230
3231 PUTBACK;
3232 call_sv (prio_cv, G_VOID | G_DISCARD);
3233 }
3234
3235 /* now call the original request */
3236 {
3237 dSP;
3238 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3239 int i;
3240
3241 PUSHMARK (SP);
3242
3243 /* first push all args to the stack */
3244 EXTEND (SP, items + 1);
3245
3246 for (i = 0; i < items; ++i)
3247 PUSHs (arg [i]);
3248
3249 /* now push the callback closure */
3250 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3251
3252 /* now call the AIO function - we assume our request is uncancelable */
3253 PUTBACK;
3254 call_sv ((SV *)req, G_VOID | G_DISCARD);
3255 }
3256
3257 /* now that the request is going, we loop till we have a result */
3258 frame->data = (void *)state;
3259 frame->prepare = prepare_schedule;
3260 frame->check = slf_check_aio_req;
3261}
3262
3263static void
3264coro_aio_req_xs (pTHX_ CV *cv)
3265{
3266 dXSARGS;
3267
3268 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3269
3270 XSRETURN_EMPTY;
3271}
3272
3273/*****************************************************************************/
3274
3275#if CORO_CLONE
3276# include "clone.c"
3277#endif
3278
3279/*****************************************************************************/
3280
3281static SV *
3282coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3283{
3284 SV *coro_sv;
3285 struct coro *coro;
3286 MAGIC *mg;
3287 HV *hv;
3288 SV *cb;
3289 int i;
3290
3291 if (argc > 0)
3292 {
3293 cb = s_get_cv_croak (argv [0]);
3294
3295 if (!is_coro)
3296 {
3297 if (CvISXSUB (cb))
3298 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3299
3300 if (!CvROOT (cb))
3301 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3302 }
3303 }
3304
3305 Newz (0, coro, 1, struct coro);
3306 coro->args = newAV ();
3307 coro->flags = CF_NEW;
3308
3309 if (coro_first) coro_first->prev = coro;
3310 coro->next = coro_first;
3311 coro_first = coro;
3312
3313 coro->hv = hv = newHV ();
3314 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3315 mg->mg_flags |= MGf_DUP;
3316 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3317
3318 if (argc > 0)
3319 {
3320 av_extend (coro->args, argc + is_coro - 1);
3321
3322 if (is_coro)
3323 {
3324 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3325 cb = (SV *)cv_coro_run;
3326 }
3327
3328 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3329
3330 for (i = 1; i < argc; i++)
3331 av_push (coro->args, newSVsv (argv [i]));
3332 }
3333
3334 return coro_sv;
3335}
3336
3337#ifndef __cplusplus
3338ecb_cold XS(boot_Coro__State);
3339#endif
3340
3341#if CORO_JIT
3342
3343static void ecb_noinline ecb_cold
3344pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3345{
3346 dSP;
3347 AV *av = newAV ();
3348
3349 av_store (av, 3, newSVuv (d));
3350 av_store (av, 2, newSVuv (c));
3351 av_store (av, 1, newSVuv (b));
3352 av_store (av, 0, newSVuv (a));
3353
3354 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3355
3356 PUTBACK;
3357}
3358
3359static void ecb_noinline ecb_cold
3360jit_init (pTHX)
3361{
3362 dSP;
3363 SV *load, *save;
3364 char *map_base;
3365 char *load_ptr, *save_ptr;
3366 STRLEN load_len, save_len, map_len;
3367 int count;
3368
3369 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3370
3371 PUSHMARK (SP);
3372 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3373 #include "state.h"
3374 count = call_pv ("Coro::State::_jit", G_ARRAY);
3375 SPAGAIN;
3376
3377 save = POPs; save_ptr = SvPVbyte (save, save_len);
3378 load = POPs; load_ptr = SvPVbyte (load, load_len);
3379
3380 map_len = load_len + save_len + 16;
3381
3382 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3383
3384 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3385
3386 load_perl_slots = (load_save_perl_slots_type)map_base;
3387 memcpy (map_base, load_ptr, load_len);
3388
3389 map_base += (load_len + 15) & ~15;
3390
3391 save_perl_slots = (load_save_perl_slots_type)map_base;
3392 memcpy (map_base, save_ptr, save_len);
3393
3394 /* we are good citizens and try to make the page read-only, so the evil evil */
3395 /* hackers might have it a bit more difficult */
3396 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3397
3398 PUTBACK;
3399 eval_pv ("undef &Coro::State::_jit", 1);
3400}
3401
3402#endif
3403
1208MODULE = Coro::State PACKAGE = Coro::State 3404MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1209 3405
1210PROTOTYPES: DISABLE 3406PROTOTYPES: DISABLE
1211 3407
1212BOOT: 3408BOOT:
1213{ 3409{
1214#ifdef USE_ITHREADS 3410#ifdef USE_ITHREADS
1215 MUTEX_INIT (&coro_mutex); 3411# if CORO_PTHREAD
3412 coro_thx = PERL_GET_CONTEXT;
1216#endif 3413# endif
1217 BOOT_PAGESIZE; 3414#endif
3415 /* perl defines these to check for existance first, but why it doesn't */
3416 /* just create them one at init time is not clear to me, except for */
3417 /* programs trying to delete them, but... */
3418 /* anyway, we declare this as invalid and make sure they are initialised here */
3419 DEFSV;
3420 ERRSV;
3421
3422 cctx_current = cctx_new_empty ();
3423
3424 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3425 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3426
3427 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3428 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3429 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3430
3431 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3432 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3433 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1218 3434
1219 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3435 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1220 3436
1221 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 3437 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1222 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV)); 3438 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1223 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1224 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1225 newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
1226 newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF)); 3439 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1227 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 3440 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1228 3441
1229 main_mainstack = PL_mainstack; 3442 main_mainstack = PL_mainstack;
1230 main_top_env = PL_top_env; 3443 main_top_env = PL_top_env;
1231 3444
1232 while (main_top_env->je_prev) 3445 while (main_top_env->je_prev)
1233 main_top_env = main_top_env->je_prev; 3446 main_top_env = main_top_env->je_prev;
1234 3447
3448 {
3449 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3450
3451 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3452 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3453
3454 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3455 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3456 }
3457
1235 coroapi.ver = CORO_API_VERSION; 3458 coroapi.ver = CORO_API_VERSION;
3459 coroapi.rev = CORO_API_REVISION;
3460
1236 coroapi.transfer = api_transfer; 3461 coroapi.transfer = api_transfer;
1237 3462
3463 coroapi.sv_state = SvSTATE_;
3464 coroapi.execute_slf = api_execute_slf;
3465 coroapi.prepare_nop = prepare_nop;
3466 coroapi.prepare_schedule = prepare_schedule;
3467 coroapi.prepare_cede = prepare_cede;
3468 coroapi.prepare_cede_notself = prepare_cede_notself;
3469
3470 time_init (aTHX);
3471
1238 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3472 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3473#if CORO_JIT
3474 PUTBACK;
3475 jit_init (aTHX);
3476 SPAGAIN;
3477#endif
1239} 3478}
1240 3479
1241SV * 3480SV *
1242new (char *klass, ...) 3481new (SV *klass, ...)
3482 ALIAS:
3483 Coro::new = 1
1243 CODE: 3484 CODE:
1244{ 3485 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1245 struct coro *coro;
1246 HV *hv;
1247 int i;
1248
1249 Newz (0, coro, 1, struct coro);
1250 coro->args = newAV ();
1251 coro->save = CORO_SAVE_DEF;
1252 coro->flags = CF_NEW;
1253
1254 if (coro_first) coro_first->prev = coro;
1255 coro->next = coro_first;
1256 coro_first = coro;
1257
1258 coro->hv = hv = newHV ();
1259 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1260 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1261
1262 for (i = 1; i < items; i++)
1263 av_push (coro->args, newSVsv (ST (i)));
1264}
1265 OUTPUT:
1266 RETVAL
1267
1268int
1269save (SV *coro, int new_save = -1)
1270 CODE:
1271 RETVAL = api_save (coro, new_save);
1272 OUTPUT: 3486 OUTPUT:
1273 RETVAL 3487 RETVAL
1274 3488
1275int 3489void
1276save_also (SV *coro_sv, int save_also) 3490transfer (...)
3491 PROTOTYPE: $$
1277 CODE: 3492 CODE:
3493 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3494
3495SV *
3496clone (Coro::State coro)
3497 CODE:
1278{ 3498{
1279 struct coro *coro = SvSTATE (coro_sv); 3499#if CORO_CLONE
1280 RETVAL = coro->save; 3500 struct coro *ncoro = coro_clone (aTHX_ coro);
1281 coro->save |= save_also; 3501 MAGIC *mg;
3502 /* TODO: too much duplication */
3503 ncoro->hv = newHV ();
3504 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3505 mg->mg_flags |= MGf_DUP;
3506 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3507#else
3508 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3509#endif
1282} 3510}
1283 OUTPUT: 3511 OUTPUT:
1284 RETVAL 3512 RETVAL
1285 3513
1286void 3514int
1287_set_stacklevel (...) 3515cctx_stacksize (int new_stacksize = 0)
1288 ALIAS: 3516 PROTOTYPE: ;$
1289 Coro::State::transfer = 1 3517 CODE:
1290 Coro::schedule = 2 3518 RETVAL = cctx_stacksize;
1291 Coro::cede = 3 3519 if (new_stacksize)
1292 Coro::cede_notself = 4
1293 CODE:
1294{
1295 struct transfer_args ta;
1296
1297 switch (ix)
1298 { 3520 {
1299 case 0: 3521 cctx_stacksize = new_stacksize;
1300 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 3522 ++cctx_gen;
1301 ta.next = 0;
1302 break;
1303
1304 case 1:
1305 if (items != 2)
1306 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1307
1308 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1309 break;
1310
1311 case 2:
1312 prepare_schedule (aTHX_ &ta);
1313 break;
1314
1315 case 3:
1316 prepare_cede (aTHX_ &ta);
1317 break;
1318
1319 case 4:
1320 if (!prepare_cede_notself (aTHX_ &ta))
1321 XSRETURN_EMPTY;
1322
1323 break;
1324 } 3523 }
1325
1326 BARRIER;
1327 TRANSFER (ta);
1328
1329 if (GIMME_V != G_VOID && ta.next != ta.prev)
1330 XSRETURN_YES;
1331}
1332
1333bool
1334_destroy (SV *coro_sv)
1335 CODE:
1336 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1337 OUTPUT: 3524 OUTPUT:
1338 RETVAL 3525 RETVAL
1339 3526
1340void 3527int
1341_exit (code) 3528cctx_max_idle (int max_idle = 0)
1342 int code 3529 PROTOTYPE: ;$
1343 PROTOTYPE: $
1344 CODE: 3530 CODE:
1345 _exit (code); 3531 RETVAL = cctx_max_idle;
1346 3532 if (max_idle > 1)
1347int 3533 cctx_max_idle = max_idle;
1348cctx_stacksize (int new_stacksize = 0)
1349 CODE:
1350 RETVAL = coro_stacksize;
1351 if (new_stacksize)
1352 coro_stacksize = new_stacksize;
1353 OUTPUT: 3534 OUTPUT:
1354 RETVAL 3535 RETVAL
1355 3536
1356int 3537int
1357cctx_count () 3538cctx_count ()
3539 PROTOTYPE:
1358 CODE: 3540 CODE:
1359 RETVAL = cctx_count; 3541 RETVAL = cctx_count;
1360 OUTPUT: 3542 OUTPUT:
1361 RETVAL 3543 RETVAL
1362 3544
1363int 3545int
1364cctx_idle () 3546cctx_idle ()
3547 PROTOTYPE:
1365 CODE: 3548 CODE:
1366 RETVAL = cctx_idle; 3549 RETVAL = cctx_idle;
1367 OUTPUT: 3550 OUTPUT:
1368 RETVAL 3551 RETVAL
1369 3552
1370void 3553void
1371list () 3554list ()
3555 PROTOTYPE:
1372 PPCODE: 3556 PPCODE:
1373{ 3557{
1374 struct coro *coro; 3558 struct coro *coro;
1375 for (coro = coro_first; coro; coro = coro->next) 3559 for (coro = coro_first; coro; coro = coro->next)
1376 if (coro->hv) 3560 if (coro->hv)
1377 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv))); 3561 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1378} 3562}
1379 3563
1380void 3564void
1381_eval (Coro::State coro, SV *coderef) 3565call (Coro::State coro, SV *coderef)
3566 ALIAS:
3567 eval = 1
1382 CODE: 3568 CODE:
1383{ 3569{
1384 if (coro->mainstack) 3570 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1385 { 3571 {
1386 struct coro temp; 3572 struct coro *current = SvSTATE_current;
1387 Zero (&temp, 1, struct coro); 3573 struct CoroSLF slf_save;
1388 temp.save = CORO_SAVE_ALL;
1389 3574
1390 if (!(coro->flags & CF_RUNNING)) 3575 if (current != coro)
1391 { 3576 {
3577 PUTBACK;
1392 save_perl (aTHX_ &temp); 3578 save_perl (aTHX_ current);
1393 load_perl (aTHX_ coro); 3579 load_perl (aTHX_ coro);
3580 /* the coro is most likely in an active SLF call.
3581 * while not strictly required (the code we execute is
3582 * not allowed to call any SLF functions), it's cleaner
3583 * to reinitialise the slf_frame and restore it later.
3584 * This might one day allow us to actually do SLF calls
3585 * from code executed here.
3586 */
3587 slf_save = slf_frame;
3588 slf_frame.prepare = 0;
3589 SPAGAIN;
1394 } 3590 }
1395 3591
1396 { 3592 PUSHSTACK;
1397 dSP; 3593
1398 ENTER;
1399 SAVETMPS;
1400 PUSHMARK (SP); 3594 PUSHMARK (SP);
1401 PUTBACK; 3595 PUTBACK;
3596
3597 if (ix)
3598 eval_sv (coderef, 0);
3599 else
1402 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3600 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3601
3602 POPSTACK;
1403 SPAGAIN; 3603 SPAGAIN;
1404 FREETMPS;
1405 LEAVE;
1406 PUTBACK;
1407 }
1408 3604
1409 if (!(coro->flags & CF_RUNNING)) 3605 if (current != coro)
1410 { 3606 {
3607 PUTBACK;
3608 slf_frame = slf_save;
1411 save_perl (aTHX_ coro); 3609 save_perl (aTHX_ coro);
1412 load_perl (aTHX_ &temp); 3610 load_perl (aTHX_ current);
3611 SPAGAIN;
1413 } 3612 }
1414 } 3613 }
1415} 3614}
1416 3615
1417SV * 3616SV *
1418is_ready (Coro::State coro) 3617is_ready (Coro::State coro)
1419 PROTOTYPE: $ 3618 PROTOTYPE: $
1420 ALIAS: 3619 ALIAS:
1421 is_ready = CF_READY 3620 is_ready = CF_READY
1422 is_running = CF_RUNNING 3621 is_running = CF_RUNNING
1423 is_new = CF_NEW 3622 is_new = CF_NEW
1424 is_destroyed = CF_DESTROYED 3623 is_destroyed = CF_ZOMBIE
3624 is_zombie = CF_ZOMBIE
3625 is_suspended = CF_SUSPENDED
1425 CODE: 3626 CODE:
1426 RETVAL = boolSV (coro->flags & ix); 3627 RETVAL = boolSV (coro->flags & ix);
1427 OUTPUT: 3628 OUTPUT:
1428 RETVAL 3629 RETVAL
1429 3630
1430IV 3631void
3632throw (SV *self, SV *exception = &PL_sv_undef)
3633 PROTOTYPE: $;$
3634 CODE:
3635{
3636 struct coro *coro = SvSTATE (self);
3637 struct coro *current = SvSTATE_current;
3638 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3639 SvREFCNT_dec (*exceptionp);
3640 SvGETMAGIC (exception);
3641 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3642
3643 api_ready (aTHX_ self);
3644}
3645
3646void
3647api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3648 PROTOTYPE: $;$
3649 C_ARGS: aTHX_ coro, flags
3650
3651SV *
3652has_cctx (Coro::State coro)
3653 PROTOTYPE: $
3654 CODE:
3655 /* maybe manage the running flag differently */
3656 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3657 OUTPUT:
3658 RETVAL
3659
3660int
3661is_traced (Coro::State coro)
3662 PROTOTYPE: $
3663 CODE:
3664 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3665 OUTPUT:
3666 RETVAL
3667
3668UV
1431rss (Coro::State coro) 3669rss (Coro::State coro)
1432 PROTOTYPE: $ 3670 PROTOTYPE: $
3671 ALIAS:
3672 usecount = 1
1433 CODE: 3673 CODE:
1434 RETVAL = coro_rss (coro); 3674 switch (ix)
3675 {
3676 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3677 case 1: RETVAL = coro->usecount; break;
3678 }
1435 OUTPUT: 3679 OUTPUT:
1436 RETVAL 3680 RETVAL
1437 3681
3682void
3683force_cctx ()
3684 PROTOTYPE:
3685 CODE:
3686 cctx_current->idle_sp = 0;
3687
3688void
3689swap_defsv (Coro::State self)
3690 PROTOTYPE: $
3691 ALIAS:
3692 swap_defav = 1
3693 CODE:
3694 if (!self->slot)
3695 croak ("cannot swap state with coroutine that has no saved state,");
3696 else
3697 {
3698 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3699 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3700
3701 SV *tmp = *src; *src = *dst; *dst = tmp;
3702 }
3703
3704void
3705cancel (Coro::State self)
3706 CODE:
3707 coro_state_destroy (aTHX_ self);
3708
3709SV *
3710enable_times (int enabled = enable_times)
3711 CODE:
3712{
3713 RETVAL = boolSV (enable_times);
3714
3715 if (enabled != enable_times)
3716 {
3717 enable_times = enabled;
3718
3719 coro_times_update ();
3720 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3721 }
3722}
3723 OUTPUT:
3724 RETVAL
3725
3726void
3727times (Coro::State self)
3728 PPCODE:
3729{
3730 struct coro *current = SvSTATE (coro_current);
3731
3732 if (ecb_expect_false (current == self))
3733 {
3734 coro_times_update ();
3735 coro_times_add (SvSTATE (coro_current));
3736 }
3737
3738 EXTEND (SP, 2);
3739 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3740 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3741
3742 if (ecb_expect_false (current == self))
3743 coro_times_sub (SvSTATE (coro_current));
3744}
3745
3746void
3747swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3748 CODE:
3749{
3750 struct coro *current = SvSTATE_current;
3751
3752 if (current == coro)
3753 SWAP_SVS (current);
3754
3755 if (!coro->swap_sv)
3756 coro->swap_sv = newAV ();
3757
3758 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3759 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3760
3761 if (current == coro)
3762 SWAP_SVS (current);
3763}
3764
1438 3765
1439MODULE = Coro::State PACKAGE = Coro 3766MODULE = Coro::State PACKAGE = Coro
1440 3767
1441BOOT: 3768BOOT:
1442{ 3769{
1443 int i; 3770 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3771 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3772 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3773 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3774 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3775 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3776 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3777 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1444 3778
3779 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3780 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3781 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3782 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3783
1445 coro_stash = gv_stashpv ("Coro", TRUE); 3784 coro_stash = gv_stashpv ("Coro", TRUE);
1446 3785
1447 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3786 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1448 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3787 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1449 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3788 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1450 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3789 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1451 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3790 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1452 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3791 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1453
1454 coro_current = get_sv ("Coro::current", FALSE);
1455 SvREADONLY_on (coro_current);
1456
1457 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1458 coro_ready[i] = newAV ();
1459 3792
1460 { 3793 {
1461 SV *sv = perl_get_sv("Coro::API", 1); 3794 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1462 3795
1463 coroapi.schedule = api_schedule; 3796 coroapi.schedule = api_schedule;
1464 coroapi.save = api_save; 3797 coroapi.schedule_to = api_schedule_to;
1465 coroapi.cede = api_cede; 3798 coroapi.cede = api_cede;
1466 coroapi.cede_notself = api_cede_notself; 3799 coroapi.cede_notself = api_cede_notself;
1467 coroapi.ready = api_ready; 3800 coroapi.ready = api_ready;
1468 coroapi.is_ready = api_is_ready; 3801 coroapi.is_ready = api_is_ready;
1469 coroapi.nready = &coro_nready; 3802 coroapi.nready = coro_nready;
1470 coroapi.current = coro_current; 3803 coroapi.current = coro_current;
1471 3804
1472 GCoroAPI = &coroapi; 3805 /*GCoroAPI = &coroapi;*/
1473 sv_setiv (sv, (IV)&coroapi); 3806 sv_setiv (sv, (IV)&coroapi);
1474 SvREADONLY_on (sv); 3807 SvREADONLY_on (sv);
1475 } 3808 }
1476} 3809}
3810
3811SV *
3812async (...)
3813 PROTOTYPE: &@
3814 CODE:
3815 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3816 api_ready (aTHX_ RETVAL);
3817 OUTPUT:
3818 RETVAL
3819
3820void
3821_destroy (Coro::State coro)
3822 CODE:
3823 /* used by the manager thread */
3824 coro_state_destroy (aTHX_ coro);
3825
3826void
3827on_destroy (Coro::State coro, SV *cb)
3828 CODE:
3829 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3830
3831void
3832join (...)
3833 CODE:
3834 CORO_EXECUTE_SLF_XS (slf_init_join);
3835
3836void
3837terminate (...)
3838 CODE:
3839 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3840
3841void
3842cancel (...)
3843 CODE:
3844 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3845
3846int
3847safe_cancel (Coro::State self, ...)
3848 C_ARGS: aTHX_ self, &ST (1), items - 1
3849
3850void
3851schedule (...)
3852 CODE:
3853 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3854
3855void
3856schedule_to (...)
3857 CODE:
3858 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3859
3860void
3861cede_to (...)
3862 CODE:
3863 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3864
3865void
3866cede (...)
3867 CODE:
3868 CORO_EXECUTE_SLF_XS (slf_init_cede);
3869
3870void
3871cede_notself (...)
3872 CODE:
3873 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1477 3874
1478void 3875void
1479_set_current (SV *current) 3876_set_current (SV *current)
1480 PROTOTYPE: $ 3877 PROTOTYPE: $
1481 CODE: 3878 CODE:
1482 SvREFCNT_dec (SvRV (coro_current)); 3879 SvREFCNT_dec (SvRV (coro_current));
1483 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3880 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3881
3882void
3883_set_readyhook (SV *hook)
3884 PROTOTYPE: $
3885 CODE:
3886 SvREFCNT_dec (coro_readyhook);
3887 SvGETMAGIC (hook);
3888 if (SvOK (hook))
3889 {
3890 coro_readyhook = newSVsv (hook);
3891 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3892 }
3893 else
3894 {
3895 coro_readyhook = 0;
3896 CORO_READYHOOK = 0;
3897 }
1484 3898
1485int 3899int
1486prio (Coro::State coro, int newprio = 0) 3900prio (Coro::State coro, int newprio = 0)
3901 PROTOTYPE: $;$
1487 ALIAS: 3902 ALIAS:
1488 nice = 1 3903 nice = 1
1489 CODE: 3904 CODE:
1490{ 3905{
1491 RETVAL = coro->prio; 3906 RETVAL = coro->prio;
… …
1493 if (items > 1) 3908 if (items > 1)
1494 { 3909 {
1495 if (ix) 3910 if (ix)
1496 newprio = coro->prio - newprio; 3911 newprio = coro->prio - newprio;
1497 3912
1498 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3913 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1499 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3914 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1500 3915
1501 coro->prio = newprio; 3916 coro->prio = newprio;
1502 } 3917 }
1503} 3918}
1504 OUTPUT: 3919 OUTPUT:
… …
1506 3921
1507SV * 3922SV *
1508ready (SV *self) 3923ready (SV *self)
1509 PROTOTYPE: $ 3924 PROTOTYPE: $
1510 CODE: 3925 CODE:
1511 RETVAL = boolSV (api_ready (self)); 3926 RETVAL = boolSV (api_ready (aTHX_ self));
1512 OUTPUT: 3927 OUTPUT:
1513 RETVAL 3928 RETVAL
1514 3929
1515int 3930int
1516nready (...) 3931nready (...)
… …
1518 CODE: 3933 CODE:
1519 RETVAL = coro_nready; 3934 RETVAL = coro_nready;
1520 OUTPUT: 3935 OUTPUT:
1521 RETVAL 3936 RETVAL
1522 3937
1523MODULE = Coro::State PACKAGE = Coro::AIO 3938void
3939suspend (Coro::State self)
3940 PROTOTYPE: $
3941 CODE:
3942 self->flags |= CF_SUSPENDED;
3943
3944void
3945resume (Coro::State self)
3946 PROTOTYPE: $
3947 CODE:
3948 self->flags &= ~CF_SUSPENDED;
3949
3950void
3951_pool_handler (...)
3952 CODE:
3953 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3954
3955void
3956async_pool (SV *cv, ...)
3957 PROTOTYPE: &@
3958 PPCODE:
3959{
3960 HV *hv = (HV *)av_pop (av_async_pool);
3961 AV *av = newAV ();
3962 SV *cb = ST (0);
3963 int i;
3964
3965 av_extend (av, items - 2);
3966 for (i = 1; i < items; ++i)
3967 av_push (av, SvREFCNT_inc_NN (ST (i)));
3968
3969 if ((SV *)hv == &PL_sv_undef)
3970 {
3971 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3972 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3973 SvREFCNT_dec (sv);
3974 }
3975
3976 {
3977 struct coro *coro = SvSTATE_hv (hv);
3978
3979 assert (!coro->invoke_cb);
3980 assert (!coro->invoke_av);
3981 coro->invoke_cb = SvREFCNT_inc (cb);
3982 coro->invoke_av = av;
3983 }
3984
3985 api_ready (aTHX_ (SV *)hv);
3986
3987 if (GIMME_V != G_VOID)
3988 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3989 else
3990 SvREFCNT_dec (hv);
3991}
1524 3992
1525SV * 3993SV *
1526_get_state () 3994rouse_cb ()
3995 PROTOTYPE:
1527 CODE: 3996 CODE:
1528{ 3997 RETVAL = coro_new_rouse_cb (aTHX);
1529 struct io_state *data;
1530
1531 RETVAL = newSV (sizeof (struct io_state));
1532 data = (struct io_state *)SvPVX (RETVAL);
1533 SvCUR_set (RETVAL, sizeof (struct io_state));
1534 SvPOK_only (RETVAL);
1535
1536 data->errorno = errno;
1537 data->laststype = PL_laststype;
1538 data->laststatval = PL_laststatval;
1539 data->statcache = PL_statcache;
1540}
1541 OUTPUT: 3998 OUTPUT:
1542 RETVAL 3999 RETVAL
1543 4000
1544void 4001void
1545_set_state (char *data_) 4002rouse_wait (...)
4003 PROTOTYPE: ;$
4004 PPCODE:
4005 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4006
4007void
4008on_enter (SV *block)
4009 ALIAS:
4010 on_leave = 1
1546 PROTOTYPE: $ 4011 PROTOTYPE: &
1547 CODE: 4012 CODE:
1548{ 4013{
1549 struct io_state *data = (void *)data_; 4014 struct coro *coro = SvSTATE_current;
4015 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1550 4016
1551 errno = data->errorno; 4017 block = s_get_cv_croak (block);
1552 PL_laststype = data->laststype;
1553 PL_laststatval = data->laststatval;
1554 PL_statcache = data->statcache;
1555}
1556 4018
4019 if (!*avp)
4020 *avp = newAV ();
4021
4022 av_push (*avp, SvREFCNT_inc (block));
4023
4024 if (!ix)
4025 on_enterleave_call (aTHX_ block);
4026
4027 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4028 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4029 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4030}
4031
4032
4033MODULE = Coro::State PACKAGE = PerlIO::cede
4034
4035BOOT:
4036 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4037
4038
4039MODULE = Coro::State PACKAGE = Coro::Semaphore
4040
4041SV *
4042new (SV *klass, SV *count = 0)
4043 CODE:
4044{
4045 int semcnt = 1;
4046
4047 if (count)
4048 {
4049 SvGETMAGIC (count);
4050
4051 if (SvOK (count))
4052 semcnt = SvIV (count);
4053 }
4054
4055 RETVAL = sv_bless (
4056 coro_waitarray_new (aTHX_ semcnt),
4057 GvSTASH (CvGV (cv))
4058 );
4059}
4060 OUTPUT:
4061 RETVAL
4062
4063# helper for Coro::Channel and others
4064SV *
4065_alloc (int count)
4066 CODE:
4067 RETVAL = coro_waitarray_new (aTHX_ count);
4068 OUTPUT:
4069 RETVAL
4070
4071SV *
4072count (SV *self)
4073 CODE:
4074 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4075 OUTPUT:
4076 RETVAL
4077
4078void
4079up (SV *self, int adjust = 1)
4080 ALIAS:
4081 adjust = 1
4082 CODE:
4083 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4084
4085void
4086down (...)
4087 CODE:
4088 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4089
4090void
4091wait (...)
4092 CODE:
4093 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4094
4095void
4096try (SV *self)
4097 PPCODE:
4098{
4099 AV *av = (AV *)SvRV (self);
4100 SV *count_sv = AvARRAY (av)[0];
4101 IV count = SvIVX (count_sv);
4102
4103 if (count > 0)
4104 {
4105 --count;
4106 SvIVX (count_sv) = count;
4107 XSRETURN_YES;
4108 }
4109 else
4110 XSRETURN_NO;
4111}
4112
4113void
4114waiters (SV *self)
4115 PPCODE:
4116{
4117 AV *av = (AV *)SvRV (self);
4118 int wcount = AvFILLp (av) + 1 - 1;
4119
4120 if (GIMME_V == G_SCALAR)
4121 XPUSHs (sv_2mortal (newSViv (wcount)));
4122 else
4123 {
4124 int i;
4125 EXTEND (SP, wcount);
4126 for (i = 1; i <= wcount; ++i)
4127 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4128 }
4129}
4130
4131MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4132
4133void
4134_may_delete (SV *sem, int count, unsigned int extra_refs)
4135 PPCODE:
4136{
4137 AV *av = (AV *)SvRV (sem);
4138
4139 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4140 && AvFILLp (av) == 0 /* no waiters, just count */
4141 && SvIV (AvARRAY (av)[0]) == count)
4142 XSRETURN_YES;
4143
4144 XSRETURN_NO;
4145}
4146
4147MODULE = Coro::State PACKAGE = Coro::Signal
4148
4149SV *
4150new (SV *klass)
4151 CODE:
4152 RETVAL = sv_bless (
4153 coro_waitarray_new (aTHX_ 0),
4154 GvSTASH (CvGV (cv))
4155 );
4156 OUTPUT:
4157 RETVAL
4158
4159void
4160wait (...)
4161 CODE:
4162 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4163
4164void
4165broadcast (SV *self)
4166 CODE:
4167{
4168 AV *av = (AV *)SvRV (self);
4169 coro_signal_wake (aTHX_ av, AvFILLp (av));
4170}
4171
4172void
4173send (SV *self)
4174 CODE:
4175{
4176 AV *av = (AV *)SvRV (self);
4177
4178 if (AvFILLp (av))
4179 coro_signal_wake (aTHX_ av, 1);
4180 else
4181 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4182}
4183
4184IV
4185awaited (SV *self)
4186 CODE:
4187 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4188 OUTPUT:
4189 RETVAL
4190
4191
4192MODULE = Coro::State PACKAGE = Coro::AnyEvent
4193
4194BOOT:
4195 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4196
4197void
4198_schedule (...)
4199 CODE:
4200{
4201 static int incede;
4202
4203 api_cede_notself (aTHX);
4204
4205 ++incede;
4206 while (coro_nready >= incede && api_cede (aTHX))
4207 ;
4208
4209 sv_setsv (sv_activity, &PL_sv_undef);
4210 if (coro_nready >= incede)
4211 {
4212 PUSHMARK (SP);
4213 PUTBACK;
4214 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4215 }
4216
4217 --incede;
4218}
4219
4220
4221MODULE = Coro::State PACKAGE = Coro::AIO
4222
4223void
4224_register (char *target, char *proto, SV *req)
4225 CODE:
4226{
4227 SV *req_cv = s_get_cv_croak (req);
4228 /* newXSproto doesn't return the CV on 5.8 */
4229 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4230 sv_setpv ((SV *)slf_cv, proto);
4231 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4232}
4233
4234MODULE = Coro::State PACKAGE = Coro::Select
4235
4236void
4237patch_pp_sselect ()
4238 CODE:
4239 if (!coro_old_pp_sselect)
4240 {
4241 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4242 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4243 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4244 }
4245
4246void
4247unpatch_pp_sselect ()
4248 CODE:
4249 if (coro_old_pp_sselect)
4250 {
4251 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4252 coro_old_pp_sselect = 0;
4253 }
4254
4255MODULE = Coro::State PACKAGE = Coro::Util
4256
4257void
4258_exit (int code)
4259 CODE:
4260 _exit (code);
4261
4262NV
4263time ()
4264 CODE:
4265 RETVAL = nvtime (aTHX);
4266 OUTPUT:
4267 RETVAL
4268
4269NV
4270gettimeofday ()
4271 PPCODE:
4272{
4273 UV tv [2];
4274 u2time (aTHX_ tv);
4275 EXTEND (SP, 2);
4276 PUSHs (sv_2mortal (newSVuv (tv [0])));
4277 PUSHs (sv_2mortal (newSVuv (tv [1])));
4278}
4279

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