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Comparing Coro/Coro/State.xs (file contents):
Revision 1.165 by root, Wed Sep 26 19:26:48 2007 UTC vs.
Revision 1.481 by root, Thu Aug 19 22:43:02 2021 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
8#if CORO_UCONTEXT
9 #define CORO_BACKEND "ucontext"
10#elif CORO_SJLJ
11 #define CORO_BACKEND "sjlj"
12#elif CORO_LINUX
13 #define CORO_BACKEND "linux"
14#elif CORO_LOSER
15 #define CORO_BACKEND "loser"
16#elif CORO_FIBER
17 #define CORO_BACKEND "fiber"
18#elif CORO_IRIX
19 #define CORO_BACKEND "irix"
20#elif CORO_ASM
21 #define CORO_BACKEND "asm"
22#elif CORO_PTHREAD
23 #define CORO_BACKEND "pthread"
24#else
25 #define CORO_BACKEND "unknown"
26#endif
27
3#define PERL_NO_GET_CONTEXT 28#define PERL_NO_GET_CONTEXT
29#define PERL_EXT
4 30
5#include "EXTERN.h" 31#include "EXTERN.h"
6#include "perl.h" 32#include "perl.h"
7#include "XSUB.h" 33#include "XSUB.h"
34#include "perliol.h"
8 35
9#include "patchlevel.h" 36#include "schmorp.h"
10 37
38#define ECB_NO_THREADS 1
39#define ECB_NO_LIBM 1
40#include "ecb.h"
41
42#include <stddef.h>
11#include <stdio.h> 43#include <stdio.h>
12#include <errno.h> 44#include <errno.h>
13#include <assert.h> 45#include <assert.h>
14 46
15#ifdef HAVE_MMAP 47#ifndef SvREFCNT_dec_NN
16# include <unistd.h> 48 #define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv)
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 49#endif
50
51#ifndef SvREFCNT_inc_NN
52 #define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
53#endif
54
55#ifndef SVs_PADSTALE
56# define SVs_PADSTALE 0
57#endif
58
59#ifdef PadARRAY
60# define NEWPADAPI 1
61# define newPADLIST(var) (Newz (0, var, 1, PADLIST), Newx (PadlistARRAY (var), 2, PAD *))
62#else
63typedef AV PADNAMELIST;
64# if !PERL_VERSION_ATLEAST(5,8,0)
65typedef AV PADLIST;
66typedef AV PAD;
24# endif 67# endif
25# include <limits.h> 68# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
26# ifndef PAGESIZE 69# define PadlistMAX(pl) AvFILLp (pl)
27# define PAGESIZE pagesize 70# define PadlistNAMES(pl) (*PadlistARRAY (pl))
28# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 71# define PadARRAY AvARRAY
29static long pagesize; 72# define PadMAX AvFILLp
30# else 73# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
31# define BOOT_PAGESIZE (void)0
32# endif 74#endif
75#ifndef PadnamelistREFCNT
76# define PadnamelistREFCNT(pnl) SvREFCNT (pnl)
77#endif
78#ifndef PadnamelistREFCNT_dec
79# define PadnamelistREFCNT_dec(pnl) SvREFCNT_dec (pnl)
80#endif
81
82/* 5.19.something has replaced SVt_BIND by SVt_INVLIST */
83/* we just alias it to SVt_IV, as that is sufficient for swap_sv for now */
84#if PERL_VERSION_ATLEAST(5,19,0)
85# define SVt_BIND SVt_IV
86#endif
87
88#if defined(_WIN32)
89# undef HAS_GETTIMEOFDAY
90# undef setjmp
91# undef longjmp
92# undef _exit
93# define setjmp _setjmp /* deep magic */
33#else 94#else
34# define PAGESIZE 0 95# 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 96#endif
44 97
45/* the maximum number of idle cctx that will be pooled */ 98/* the maximum number of idle cctx that will be pooled */
46#define MAX_IDLE_CCTX 8 99static int cctx_max_idle = 4;
47 100
48#define PERL_VERSION_ATLEAST(a,b,c) \ 101#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
49 (PERL_REVISION > (a) \ 102# 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 103#endif
87 104
88/* prefer perl internal functions over our own? */ 105/* prefer perl internal functions over our own? */
89#ifndef CORO_PREFER_PERL_FUNCTIONS 106#ifndef CORO_PREFER_PERL_FUNCTIONS
90# define CORO_PREFER_PERL_FUNCTIONS 0 107# define CORO_PREFER_PERL_FUNCTIONS 0
91#endif 108#endif
92 109
93/* The next macros try to return the current stack pointer, in an as 110/* The next macros try to return the current stack pointer, in an as
94 * portable way as possible. */ 111 * portable way as possible. */
95#define dSTACKLEVEL volatile char stacklevel
96#define STACKLEVEL ((void *)&stacklevel)
97
98#define IN_DESTRUCT (PL_main_cv == Nullcv)
99
100#if __GNUC__ >= 3 112#if __GNUC__ >= 4
101# define attribute(x) __attribute__(x) 113# define dSTACKLEVEL int stacklevel_dummy
102# define BARRIER __asm__ __volatile__ ("" : : : "memory") 114# define STACKLEVEL __builtin_frame_address (0)
103#else 115#else
104# define attribute(x) 116# define dSTACKLEVEL volatile void *stacklevel
105# define BARRIER 117# define STACKLEVEL ((void *)&stacklevel)
106#endif 118#endif
107 119
108#define NOINLINE attribute ((noinline)) 120#define IN_DESTRUCT PL_dirty
109 121
110#include "CoroAPI.h" 122#include "CoroAPI.h"
123#define GCoroAPI (&coroapi) /* very sneaky */
111 124
112#ifdef USE_ITHREADS 125#ifdef USE_ITHREADS
113static perl_mutex coro_mutex; 126# if CORO_PTHREAD
114# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 127static void *coro_thx;
115# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 128# endif
129#endif
130
131#ifdef __linux
132# include <time.h> /* for timespec */
133# include <syscall.h> /* for SYS_* */
134# ifdef SYS_clock_gettime
135# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
136# define CORO_CLOCK_MONOTONIC 1
137# define CORO_CLOCK_THREAD_CPUTIME_ID 3
138# endif
139#endif
140
141/* one off bugfix for perl 5.22 */
142#if PERL_VERSION_ATLEAST(5,22,0) && !PERL_VERSION_ATLEAST(5,24,0)
143# undef PadlistNAMES
144# define PadlistNAMES(pl) *((PADNAMELIST **)PadlistARRAY (pl))
145#endif
146
147#if PERL_VERSION_ATLEAST(5,24,0)
148# define SUB_ARGARRAY PL_curpad[0]
116#else 149#else
117# define LOCK (void)0 150# define SUB_ARGARRAY (SV *)cx->blk_sub.argarray
118# define UNLOCK (void)0
119#endif 151#endif
120 152
121/* helper storage struct for Coro::AIO */ 153/* perl usually suppresses asserts. for debugging, we sometimes force it to be on */
122struct io_state 154#if 0
123{ 155# undef NDEBUG
124 int errorno; 156# include <assert.h>
125 I32 laststype; 157#endif
126 int laststatval;
127 Stat_t statcache;
128};
129 158
159static double (*nvtime)(); /* so why doesn't it take void? */
160static void (*u2time)(pTHX_ UV ret[2]);
161
162/* we hijack an hopefully unused CV flag for our purposes */
163#define CVf_SLF 0x4000
164static OP *pp_slf (pTHX);
165static void slf_destroy (pTHX_ struct coro *coro);
166
167static U32 cctx_gen;
130static size_t coro_stacksize = CORO_STACKSIZE; 168static size_t cctx_stacksize = CORO_STACKSIZE;
131static struct CoroAPI coroapi; 169static struct CoroAPI coroapi;
132static AV *main_mainstack; /* used to differentiate between $main and others */ 170static AV *main_mainstack; /* used to differentiate between $main and others */
133static JMPENV *main_top_env; 171static JMPENV *main_top_env;
134static HV *coro_state_stash, *coro_stash; 172static HV *coro_state_stash, *coro_stash;
135static SV *coro_mortal; /* will be freed after next transfer */ 173static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
174
175static AV *av_destroy; /* destruction queue */
176static SV *sv_manager; /* the manager coro */
177static SV *sv_idle; /* $Coro::idle */
178
179static GV *irsgv; /* $/ */
180static GV *stdoutgv; /* *STDOUT */
181static SV *rv_diehook;
182static SV *rv_warnhook;
136 183
137/* async_pool helper stuff */ 184/* async_pool helper stuff */
138static SV *sv_pool_rss; 185static SV *sv_pool_rss;
139static SV *sv_pool_size; 186static SV *sv_pool_size;
187static SV *sv_async_pool_idle; /* description string */
140static AV *av_async_pool; 188static AV *av_async_pool; /* idle pool */
189static SV *sv_Coro; /* class string */
190static CV *cv_pool_handler;
191
192/* Coro::AnyEvent */
193static SV *sv_activity;
194
195/* enable processtime/realtime profiling */
196static char enable_times;
197typedef U32 coro_ts[2];
198static coro_ts time_real, time_cpu;
199static char times_valid;
141 200
142static struct coro_cctx *cctx_first; 201static struct coro_cctx *cctx_first;
143static int cctx_count, cctx_idle; 202static int cctx_count, cctx_idle;
144 203
145enum { 204enum
205{
146 CC_MAPPED = 0x01, 206 CC_MAPPED = 0x01,
147 CC_TRACE = 0x02,
148 CC_NOREUSE = 0x04, /* throw this away after tracing */ 207 CC_NOREUSE = 0x02, /* throw this away after tracing */
208 CC_TRACE = 0x04,
209 CC_TRACE_SUB = 0x08, /* trace sub calls */
210 CC_TRACE_LINE = 0x10, /* trace each statement */
211 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
149}; 212};
150 213
151/* this is a structure representing a c-level coroutine */ 214/* this is a structure representing a c-level coroutine */
152typedef struct coro_cctx { 215typedef struct coro_cctx
216{
153 struct coro_cctx *next; 217 struct coro_cctx *next;
154 218
155 /* the stack */ 219 /* the stack */
156 void *sptr; 220 struct coro_stack stack;
157 size_t ssize;
158 221
159 /* cpu state */ 222 /* cpu state */
160 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 223 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
224#ifndef NDEBUG
161 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 225 JMPENV *idle_te; /* same as idle_sp, but for top_env */
226#endif
162 JMPENV *top_env; 227 JMPENV *top_env;
163 coro_context cctx; 228 coro_context cctx;
164 229
230 U32 gen;
165#if CORO_USE_VALGRIND 231#if CORO_USE_VALGRIND
166 int valgrind_id; 232 int valgrind_id;
167#endif 233#endif
168 unsigned char flags; 234 unsigned char flags;
169} coro_cctx; 235} coro_cctx;
170 236
237static coro_cctx *cctx_current; /* the currently running cctx */
238
239/*****************************************************************************/
240
241static MGVTBL coro_state_vtbl;
242
171enum { 243enum
244{
172 CF_RUNNING = 0x0001, /* coroutine is running */ 245 CF_RUNNING = 0x0001, /* coroutine is running */
173 CF_READY = 0x0002, /* coroutine is ready */ 246 CF_READY = 0x0002, /* coroutine is ready */
174 CF_NEW = 0x0004, /* has never been switched to */ 247 CF_NEW = 0x0004, /* has never been switched to */
175 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 248 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
249 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
250 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
176}; 251};
177 252
253/* the structure where most of the perl state is stored, overlaid on the cxstack */
254typedef struct
255{
256 #define VARx(name,expr,type) type name;
257 #include "state.h"
258} perl_slots;
259
260/* how many context stack entries do we need for perl_slots */
261#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
262
178/* this is a structure representing a perl-level coroutine */ 263/* this is a structure representing a perl-level coroutine */
179struct coro { 264struct coro
265{
180 /* the c coroutine allocated to this perl coroutine, if any */ 266 /* the C coroutine allocated to this perl coroutine, if any */
181 coro_cctx *cctx; 267 coro_cctx *cctx;
182 268
269 /* ready queue */
270 struct coro *next_ready;
271
272 /* state data */
273 struct CoroSLF slf_frame; /* saved slf frame */
274 AV *mainstack;
275 perl_slots *slot; /* basically the saved sp */
276
277 CV *startcv; /* the CV to execute */
183 /* data associated with this coroutine (initial args) */ 278 AV *args; /* data associated with this coroutine (initial args) */
184 AV *args;
185 int refcnt;
186 int save; /* CORO_SAVE flags */
187 int flags; /* CF_ flags */ 279 int flags; /* CF_ flags */
280 HV *hv; /* the perl hash associated with this coro, if any */
188 281
189 /* optionally saved, might be zero */ 282 /* statistics */
190 AV *defav; /* @_ */ 283 int usecount; /* number of transfers to this coro */
191 SV *defsv; /* $_ */
192 SV *errsv; /* $@ */
193 GV *deffh; /* default filehandle */
194 SV *irssv; /* $/ */
195 SV *irssv_sv; /* real $/ cache */
196
197#define VAR(name,type) type name;
198# include "state.h"
199#undef VAR
200 284
201 /* coro process data */ 285 /* coro process data */
202 int prio; 286 int prio;
287 SV *except; /* exception to be thrown */
288 SV *rouse_cb; /* most recently created rouse callback */
289 AV *on_destroy; /* callbacks or coros to notify on destroy */
290 AV *status; /* the exit status list */
291
292 /* async_pool */
293 SV *saved_deffh;
294 SV *invoke_cb;
295 AV *invoke_av;
296
297 /* on_enter/on_leave */
298 AV *on_enter; AV *on_enter_xs;
299 AV *on_leave; AV *on_leave_xs;
300
301 /* swap_sv */
302 AV *swap_sv;
303
304 /* times */
305 coro_ts t_cpu, t_real;
203 306
204 /* linked list */ 307 /* linked list */
205 struct coro *next, *prev; 308 struct coro *next, *prev;
206 HV *hv; /* the perl hash associated with this coro, if any */
207}; 309};
208 310
209typedef struct coro *Coro__State; 311typedef struct coro *Coro__State;
210typedef struct coro *Coro__State_or_hashref; 312typedef struct coro *Coro__State_or_hashref;
211 313
314/* the following variables are effectively part of the perl context */
315/* and get copied between struct coro and these variables */
316/* the main reason we don't support windows process emulation */
317static struct CoroSLF slf_frame; /* the current slf frame */
318
212/** Coro ********************************************************************/ 319/** Coro ********************************************************************/
213 320
214#define PRIO_MAX 3 321#define CORO_PRIO_MAX 3
215#define PRIO_HIGH 1 322#define CORO_PRIO_HIGH 1
216#define PRIO_NORMAL 0 323#define CORO_PRIO_NORMAL 0
217#define PRIO_LOW -1 324#define CORO_PRIO_LOW -1
218#define PRIO_IDLE -3 325#define CORO_PRIO_IDLE -3
219#define PRIO_MIN -4 326#define CORO_PRIO_MIN -4
220 327
221/* for Coro.pm */ 328/* for Coro.pm */
222static SV *coro_current; 329static SV *coro_current;
223static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 330static SV *coro_readyhook;
224static int coro_nready; 331static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
332static CV *cv_coro_run;
225static struct coro *coro_first; 333static struct coro *coro_first;
334#define coro_nready coroapi.nready
335
336/** JIT *********************************************************************/
337
338#if CORO_JIT
339 /* APPLE doesn't have mmap though */
340 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
341 #ifndef CORO_JIT_TYPE
342 #if ECB_AMD64 && CORO_JIT_UNIXY
343 #define CORO_JIT_TYPE "amd64-unix"
344 #elif __i386 && CORO_JIT_UNIXY
345 #define CORO_JIT_TYPE "x86-unix"
346 #endif
347 #endif
348#endif
349
350#if !defined(CORO_JIT_TYPE) || _POSIX_MEMORY_PROTECTION <= 0
351 #undef CORO_JIT
352#endif
353
354#if CORO_JIT
355 typedef void (*load_save_perl_slots_type)(perl_slots *);
356 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
357#endif
358
359/** Coro::Select ************************************************************/
360
361static OP *(*coro_old_pp_sselect) (pTHX);
362static SV *coro_select_select;
363
364/* horrible hack, but if it works... */
365static OP *
366coro_pp_sselect (pTHX)
367{
368 dSP;
369 PUSHMARK (SP - 4); /* fake argument list */
370 XPUSHs (coro_select_select);
371 PUTBACK;
372
373 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
374 PL_op->op_flags |= OPf_STACKED;
375 PL_op->op_private = 0;
376 return PL_ppaddr [OP_ENTERSUB](aTHX);
377}
378
379/** time stuff **************************************************************/
380
381#ifdef HAS_GETTIMEOFDAY
382
383ecb_inline void
384coro_u2time (pTHX_ UV ret[2])
385{
386 struct timeval tv;
387 gettimeofday (&tv, 0);
388
389 ret [0] = tv.tv_sec;
390 ret [1] = tv.tv_usec;
391}
392
393ecb_inline double
394coro_nvtime (void)
395{
396 struct timeval tv;
397 gettimeofday (&tv, 0);
398
399 return tv.tv_sec + tv.tv_usec * 1e-6;
400}
401
402ecb_inline void
403time_init (pTHX)
404{
405 nvtime = coro_nvtime;
406 u2time = coro_u2time;
407}
408
409#else
410
411ecb_inline void
412time_init (pTHX)
413{
414 SV **svp;
415
416 require_pv ("Time/HiRes.pm");
417
418 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
419
420 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
421 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
422
423 nvtime = INT2PTR (double (*)(), SvIV (*svp));
424
425 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
426 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
427}
428
429#endif
226 430
227/** lowlevel stuff **********************************************************/ 431/** lowlevel stuff **********************************************************/
228 432
229static AV * 433static SV * ecb_noinline
434coro_get_sv (pTHX_ const char *name, int create)
435{
436#if PERL_VERSION_ATLEAST (5,10,0)
437 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
438 get_sv (name, create);
439#endif
440 return get_sv (name, create);
441}
442
443static AV * ecb_noinline
444coro_get_av (pTHX_ const char *name, int create)
445{
446#if PERL_VERSION_ATLEAST (5,10,0)
447 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
448 get_av (name, create);
449#endif
450 return get_av (name, create);
451}
452
453static HV * ecb_noinline
454coro_get_hv (pTHX_ const char *name, int create)
455{
456#if PERL_VERSION_ATLEAST (5,10,0)
457 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
458 get_hv (name, create);
459#endif
460 return get_hv (name, create);
461}
462
463ecb_inline void
464coro_times_update (void)
465{
466#ifdef coro_clock_gettime
467 struct timespec ts;
468
469 ts.tv_sec = ts.tv_nsec = 0;
470 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
471 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
472
473 ts.tv_sec = ts.tv_nsec = 0;
474 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
475 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
476#else
477 dTHX;
478 UV tv[2];
479
480 u2time (aTHX_ tv);
481 time_real [0] = tv [0];
482 time_real [1] = tv [1] * 1000;
483#endif
484}
485
486ecb_inline void
487coro_times_add (struct coro *c)
488{
489 c->t_real [1] += time_real [1];
490 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
491 c->t_real [0] += time_real [0];
492
493 c->t_cpu [1] += time_cpu [1];
494 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
495 c->t_cpu [0] += time_cpu [0];
496}
497
498ecb_inline void
499coro_times_sub (struct coro *c)
500{
501 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
502 c->t_real [1] -= time_real [1];
503 c->t_real [0] -= time_real [0];
504
505 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
506 c->t_cpu [1] -= time_cpu [1];
507 c->t_cpu [0] -= time_cpu [0];
508}
509
510/*****************************************************************************/
511/* magic glue */
512
513#define CORO_MAGIC_type_cv 26
514#define CORO_MAGIC_type_state PERL_MAGIC_ext
515
516#define CORO_MAGIC_NN(sv, type) \
517 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
518 ? SvMAGIC (sv) \
519 : mg_find (sv, type))
520
521#define CORO_MAGIC(sv, type) \
522 (ecb_expect_true (SvMAGIC (sv)) \
523 ? CORO_MAGIC_NN (sv, type) \
524 : 0)
525
526#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
527#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
528
529ecb_inline MAGIC *
530SvSTATEhv_p (pTHX_ SV *coro)
531{
532 MAGIC *mg;
533
534 if (ecb_expect_true (
535 SvTYPE (coro) == SVt_PVHV
536 && (mg = CORO_MAGIC_state (coro))
537 && mg->mg_virtual == &coro_state_vtbl
538 ))
539 return mg;
540
541 return 0;
542}
543
544ecb_inline struct coro *
545SvSTATE_ (pTHX_ SV *coro_sv)
546{
547 MAGIC *mg;
548
549 if (SvROK (coro_sv))
550 coro_sv = SvRV (coro_sv);
551
552 mg = SvSTATEhv_p (aTHX_ coro_sv);
553 if (!mg)
554 croak ("Coro::State object required");
555
556 return (struct coro *)mg->mg_ptr;
557}
558
559#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
560
561/* faster than SvSTATE, but expects a coroutine hv */
562#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
563#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
564
565/*****************************************************************************/
566/* padlist management and caching */
567
568ecb_inline PADLIST *
230coro_clone_padlist (pTHX_ CV *cv) 569coro_derive_padlist (pTHX_ CV *cv)
231{ 570{
232 AV *padlist = CvPADLIST (cv); 571 PADLIST *padlist = CvPADLIST (cv);
233 AV *newpadlist, *newpad; 572 PADLIST *newpadlist;
573 PADNAMELIST *padnames;
574 PAD *newpad;
575 PADOFFSET off = PadlistMAX (padlist) + 1;
234 576
235 newpadlist = newAV (); 577#if NEWPADAPI
578
579 /* if we had the original CvDEPTH, we might be able to steal the CvDEPTH+1 entry instead */
580 /* 20131102194744.GA6705@schmorp.de, 20131102195825.2013.qmail@lists-nntp.develooper.com */
581 while (!PadlistARRAY (padlist)[off - 1])
582 --off;
583
584 Perl_pad_push (aTHX_ padlist, off);
585
586 newpad = PadlistARRAY (padlist)[off];
587 PadlistARRAY (padlist)[off] = 0;
588
589#else
590
591#if PERL_VERSION_ATLEAST (5,10,0)
592 Perl_pad_push (aTHX_ padlist, off);
593#else
594 Perl_pad_push (aTHX_ padlist, off, 1);
595#endif
596
597 newpad = PadlistARRAY (padlist)[off];
598 PadlistMAX (padlist) = off - 1;
599
600#endif
601
602 newPADLIST (newpadlist);
603#if !PERL_VERSION_ATLEAST(5,15,3)
604 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
236 AvREAL_off (newpadlist); 605 AvREAL_off (newpadlist);
237#if PERL_VERSION_ATLEAST (5,9,0)
238 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
239#else
240 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
241#endif 606#endif
242 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
243 --AvFILLp (padlist);
244 607
245 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 608 /* Already extended to 2 elements by newPADLIST. */
246 av_store (newpadlist, 1, (SV *)newpad); 609 PadlistMAX (newpadlist) = 1;
610
611 padnames = PadlistNAMES (padlist);
612 ++PadnamelistREFCNT (padnames);
613 PadlistNAMES (newpadlist) = padnames;
614
615 PadlistARRAY (newpadlist)[1] = newpad;
247 616
248 return newpadlist; 617 return newpadlist;
249} 618}
250 619
251static void 620ecb_inline void
252free_padlist (pTHX_ AV *padlist) 621free_padlist (pTHX_ PADLIST *padlist)
253{ 622{
254 /* may be during global destruction */ 623 /* may be during global destruction */
255 if (SvREFCNT (padlist)) 624 if (!IN_DESTRUCT)
256 { 625 {
257 I32 i = AvFILLp (padlist); 626 I32 i = PadlistMAX (padlist);
258 while (i >= 0) 627
628 while (i > 0) /* special-case index 0 */
259 { 629 {
260 SV **svp = av_fetch (padlist, i--, FALSE); 630 /* we try to be extra-careful here */
631 PAD *pad = PadlistARRAY (padlist)[i--];
632
261 if (svp) 633 if (pad)
262 { 634 {
263 SV *sv; 635 I32 j = PadMAX (pad);
264 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 636
637 while (j >= 0)
265 SvREFCNT_dec (sv); 638 SvREFCNT_dec (PadARRAY (pad)[j--]);
266 639
640 PadMAX (pad) = -1;
267 SvREFCNT_dec (*svp); 641 SvREFCNT_dec (pad);
268 } 642 }
269 } 643 }
270 644
645 PadnamelistREFCNT_dec (PadlistNAMES (padlist));
646
647#if NEWPADAPI
648 Safefree (PadlistARRAY (padlist));
649 Safefree (padlist);
650#else
651 AvFILLp (padlist) = -1;
652 AvREAL_off (padlist);
271 SvREFCNT_dec ((SV*)padlist); 653 SvREFCNT_dec ((SV*)padlist);
654#endif
272 } 655 }
273} 656}
274 657
275static int 658static int
276coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 659coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
277{ 660{
278 AV *padlist; 661 PADLIST *padlist;
279 AV *av = (AV *)mg->mg_obj; 662 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
663 size_t len = *(size_t *)mg->mg_ptr;
280 664
281 /* casting is fun. */ 665 /* perl manages to free our internal AV and _then_ call us */
282 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 666 if (IN_DESTRUCT)
667 return 0;
668
669 while (len--)
283 free_padlist (aTHX_ padlist); 670 free_padlist (aTHX_ padlists[len]);
284
285 SvREFCNT_dec (av);
286 671
287 return 0; 672 return 0;
288} 673}
289 674
290#define PERL_MAGIC_coro PERL_MAGIC_ext 675static MGVTBL coro_cv_vtbl = {
291 676 0, 0, 0, 0,
292static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 677 coro_cv_free
293 678};
294#define CORO_MAGIC(cv) \
295 SvMAGIC (cv) \
296 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
297 ? SvMAGIC (cv) \
298 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
299 : 0
300 679
301/* the next two functions merely cache the padlists */ 680/* the next two functions merely cache the padlists */
302static void 681ecb_inline void
303get_padlist (pTHX_ CV *cv) 682get_padlist (pTHX_ CV *cv)
304{ 683{
305 MAGIC *mg = CORO_MAGIC (cv); 684 MAGIC *mg = CORO_MAGIC_cv (cv);
306 AV *av; 685 size_t *lenp;
307 686
308 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 687 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
309 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 688 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
310 else 689 else
311 { 690 {
312#if CORO_PREFER_PERL_FUNCTIONS 691#if CORO_PREFER_PERL_FUNCTIONS
313 /* this is probably cleaner, but also slower? */ 692 /* this is probably cleaner? but also slower! */
693 /* in practise, it seems to be less stable */
314 CV *cp = Perl_cv_clone (cv); 694 CV *cp = Perl_cv_clone (aTHX_ cv);
315 CvPADLIST (cv) = CvPADLIST (cp); 695 CvPADLIST (cv) = CvPADLIST (cp);
316 CvPADLIST (cp) = 0; 696 CvPADLIST (cp) = 0;
317 SvREFCNT_dec (cp); 697 SvREFCNT_dec (cp);
318#else 698#else
319 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 699 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
320#endif 700#endif
321 } 701 }
322} 702}
323 703
324static void 704ecb_inline void
325put_padlist (pTHX_ CV *cv) 705put_padlist (pTHX_ CV *cv)
326{ 706{
327 MAGIC *mg = CORO_MAGIC (cv); 707 MAGIC *mg = CORO_MAGIC_cv (cv);
328 AV *av;
329 708
330 if (!mg) 709 if (ecb_expect_false (!mg))
331 {
332 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
333 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
334 mg->mg_virtual = &vtbl_coro;
335 mg->mg_obj = (SV *)newAV ();
336 } 710 {
711 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
712 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
713 mg->mg_len = 1; /* so mg_free frees mg_ptr */
714 }
715 else
716 Renew (mg->mg_ptr,
717 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
718 char);
337 719
338 av = (AV *)mg->mg_obj; 720 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
339
340 if (AvFILLp (av) >= AvMAX (av))
341 av_extend (av, AvMAX (av) + 1);
342
343 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
344} 721}
345 722
346/** load & save, init *******************************************************/ 723/** load & save, init *******************************************************/
347 724
348#define SB do { 725ecb_inline void
349#define SE } while (0) 726swap_sv (SV *a, SV *b)
727{
728 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
729 SV tmp;
350 730
351#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE 731 /* swap sv_any */
732 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
733
734 /* swap sv_flags */
735 SvFLAGS (&tmp) = SvFLAGS (a);
736 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
737 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
738
739#if PERL_VERSION_ATLEAST (5,10,0)
740 /* perl 5.10 and later complicates this _quite_ a bit, but it also
741 * is much faster, so no quarrels here. alternatively, we could
742 * sv_upgrade to avoid this.
743 */
744 {
745 /* swap sv_u */
746 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
747
748 /* if SvANY points to the head, we need to adjust the pointers,
749 * as the pointer for a still points to b, and maybe vice versa.
750 */
751 U32 svany_in_head_set = (1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV);
752 #if NVSIZE <= IVSIZE && PERL_VERSION_ATLEAST(5,22,0)
753 svany_in_head_set |= 1 << SVt_NV;
754 #endif
755
756 #define svany_in_head(type) (svany_in_head_set & (1 << (type)))
757
758 if (svany_in_head (SvTYPE (a)))
759 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
760
761 if (svany_in_head (SvTYPE (b)))
762 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
763 }
764#endif
765}
766
767/* swap sv heads, at least logically */
768static void
769swap_svs_enter (pTHX_ Coro__State c)
770{
771 int i;
772
773 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
774 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
775}
776
777static void
778swap_svs_leave (pTHX_ Coro__State c)
779{
780 int i;
781
782 for (i = AvFILLp (c->swap_sv) - 1; i >= 0; i -= 2)
783 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
784}
785
786#define SWAP_SVS_ENTER(coro) \
787 if (ecb_expect_false ((coro)->swap_sv)) \
788 swap_svs_enter (aTHX_ (coro))
789
790#define SWAP_SVS_LEAVE(coro) \
791 if (ecb_expect_false ((coro)->swap_sv)) \
792 swap_svs_leave (aTHX_ (coro))
793
794static void
795on_enterleave_call (pTHX_ SV *cb);
352 796
353static void 797static void
354load_perl (pTHX_ Coro__State c) 798load_perl (pTHX_ Coro__State c)
355{ 799{
356#define VAR(name,type) PL_ ## name = c->name; 800 perl_slots *slot = c->slot;
801 c->slot = 0;
802
803 PL_mainstack = c->mainstack;
804
805#if CORO_JIT
806 load_perl_slots (slot);
807#else
808 #define VARx(name,expr,type) expr = slot->name;
357# include "state.h" 809 #include "state.h"
358#undef VAR 810#endif
359
360 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
361 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
362 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
363 if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
364
365 if (c->irssv)
366 {
367 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
368 {
369 SvREFCNT_dec (c->irssv);
370 c->irssv = 0;
371 }
372 else
373 {
374 REPLACE_SV (PL_rs, c->irssv);
375 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
376 sv_setsv (c->irssv_sv, PL_rs);
377 }
378 }
379 811
380 { 812 {
381 dSP; 813 dSP;
814
382 CV *cv; 815 CV *cv;
383 816
384 /* now do the ugly restore mess */ 817 /* now do the ugly restore mess */
385 while ((cv = (CV *)POPs)) 818 while (ecb_expect_true (cv = (CV *)POPs))
386 { 819 {
387 put_padlist (aTHX_ cv); /* mark this padlist as available */ 820 put_padlist (aTHX_ cv); /* mark this padlist as available */
388 CvDEPTH (cv) = PTR2IV (POPs); 821 CvDEPTH (cv) = PTR2IV (POPs);
389 CvPADLIST (cv) = (AV *)POPs; 822 CvPADLIST (cv) = (PADLIST *)POPs;
390 } 823 }
391 824
392 PUTBACK; 825 PUTBACK;
393 } 826 }
827
828 slf_frame = c->slf_frame;
829 CORO_THROW = c->except;
830
831 if (ecb_expect_false (enable_times))
832 {
833 if (ecb_expect_false (!times_valid))
834 coro_times_update ();
835
836 coro_times_sub (c);
837 }
838
839 if (ecb_expect_false (c->on_enter))
840 {
841 int i;
842
843 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
844 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
845 }
846
847 if (ecb_expect_false (c->on_enter_xs))
848 {
849 int i;
850
851 for (i = 0; i <= AvFILLp (c->on_enter_xs); i += 2)
852 ((coro_enterleave_hook)AvARRAY (c->on_enter_xs)[i]) (aTHX_ AvARRAY (c->on_enter_xs)[i + 1]);
853 }
854
855 SWAP_SVS_ENTER (c);
394} 856}
395 857
396static void 858static void
397save_perl (pTHX_ Coro__State c) 859save_perl (pTHX_ Coro__State c)
398{ 860{
861 SWAP_SVS_LEAVE (c);
862
863 if (ecb_expect_false (c->on_leave_xs))
864 {
865 int i;
866
867 for (i = AvFILLp (c->on_leave_xs) - 1; i >= 0; i -= 2)
868 ((coro_enterleave_hook)AvARRAY (c->on_leave_xs)[i]) (aTHX_ AvARRAY (c->on_leave_xs)[i + 1]);
869 }
870
871 if (ecb_expect_false (c->on_leave))
872 {
873 int i;
874
875 for (i = AvFILLp (c->on_leave); i >= 0; --i)
876 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
877 }
878
879 times_valid = 0;
880
881 if (ecb_expect_false (enable_times))
882 {
883 coro_times_update (); times_valid = 1;
884 coro_times_add (c);
885 }
886
887 c->except = CORO_THROW;
888 c->slf_frame = slf_frame;
889
399 { 890 {
400 dSP; 891 dSP;
401 I32 cxix = cxstack_ix; 892 I32 cxix = cxstack_ix;
402 PERL_CONTEXT *ccstk = cxstack; 893 PERL_CONTEXT *ccstk = cxstack;
403 PERL_SI *top_si = PL_curstackinfo; 894 PERL_SI *top_si = PL_curstackinfo;
… …
409 900
410 XPUSHs (Nullsv); 901 XPUSHs (Nullsv);
411 /* this loop was inspired by pp_caller */ 902 /* this loop was inspired by pp_caller */
412 for (;;) 903 for (;;)
413 { 904 {
414 while (cxix >= 0) 905 while (ecb_expect_true (cxix >= 0))
415 { 906 {
416 PERL_CONTEXT *cx = &ccstk[cxix--]; 907 PERL_CONTEXT *cx = &ccstk[cxix--];
417 908
418 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT) 909 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
419 { 910 {
420 CV *cv = cx->blk_sub.cv; 911 CV *cv = cx->blk_sub.cv;
421 912
422 if (CvDEPTH (cv)) 913 if (ecb_expect_true (CvDEPTH (cv)))
423 { 914 {
424 EXTEND (SP, 3); 915 EXTEND (SP, 3);
425 PUSHs ((SV *)CvPADLIST (cv)); 916 PUSHs ((SV *)CvPADLIST (cv));
426 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 917 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
427 PUSHs ((SV *)cv); 918 PUSHs ((SV *)cv);
428 919
429 CvDEPTH (cv) = 0; 920 CvDEPTH (cv) = 0;
430 get_padlist (aTHX_ cv); 921 get_padlist (aTHX_ cv);
431 } 922 }
432 } 923 }
433 } 924 }
434 925
435 if (top_si->si_type == PERLSI_MAIN) 926 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
436 break; 927 break;
437 928
438 top_si = top_si->si_prev; 929 top_si = top_si->si_prev;
439 ccstk = top_si->si_cxstack; 930 ccstk = top_si->si_cxstack;
440 cxix = top_si->si_cxix; 931 cxix = top_si->si_cxix;
441 } 932 }
442 933
443 PUTBACK; 934 PUTBACK;
444 } 935 }
445 936
446 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 937 /* allocate some space on the context stack for our purposes */
447 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 938 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
448 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 939 {
449 c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0; 940 unsigned int i;
450 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
451 941
452#define VAR(name,type)c->name = PL_ ## name; 942 for (i = 0; i < SLOT_COUNT; ++i)
943 CXINC;
944
945 cxstack_ix -= SLOT_COUNT; /* undo allocation */
946 }
947
948 c->mainstack = PL_mainstack;
949
950 {
951 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
952
953#if CORO_JIT
954 save_perl_slots (slot);
955#else
956 #define VARx(name,expr,type) slot->name = expr;
453# include "state.h" 957 #include "state.h"
454#undef VAR 958#endif
959 }
455} 960}
456 961
457/* 962/*
458 * allocate various perl stacks. This is an exact copy 963 * allocate various perl stacks. This is almost an exact copy
459 * of perl.c:init_stacks, except that it uses less memory 964 * of perl.c:init_stacks, except that it uses less memory
460 * on the (sometimes correct) assumption that coroutines do 965 * on the (sometimes correct) assumption that coroutines do
461 * not usually need a lot of stackspace. 966 * not usually need a lot of stackspace.
462 */ 967 */
463#if CORO_PREFER_PERL_FUNCTIONS 968#if CORO_PREFER_PERL_FUNCTIONS
464# define coro_init_stacks init_stacks 969# define coro_init_stacks(thx) init_stacks ()
465#else 970#else
466static void 971static void
467coro_init_stacks (pTHX) 972coro_init_stacks (pTHX)
468{ 973{
469 PL_curstackinfo = new_stackinfo(64, 6); 974 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
470 PL_curstackinfo->si_type = PERLSI_MAIN; 975 PL_curstackinfo->si_type = PERLSI_MAIN;
471 PL_curstack = PL_curstackinfo->si_stack; 976 PL_curstack = PL_curstackinfo->si_stack;
472 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 977 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
473 978
474 PL_stack_base = AvARRAY(PL_curstack); 979 PL_stack_base = AvARRAY(PL_curstack);
475 PL_stack_sp = PL_stack_base; 980 PL_stack_sp = PL_stack_base;
476 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 981 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
477 982
478 New(50,PL_tmps_stack,64,SV*); 983 New(50,PL_tmps_stack,32,SV*);
479 PL_tmps_floor = -1; 984 PL_tmps_floor = -1;
480 PL_tmps_ix = -1; 985 PL_tmps_ix = -1;
481 PL_tmps_max = 64; 986 PL_tmps_max = 32;
482 987
483 New(54,PL_markstack,16,I32); 988 New(54,PL_markstack,16,I32);
484 PL_markstack_ptr = PL_markstack; 989 PL_markstack_ptr = PL_markstack;
485 PL_markstack_max = PL_markstack + 16; 990 PL_markstack_max = PL_markstack + 16;
486 991
487#ifdef SET_MARK_OFFSET 992#ifdef SET_MARK_OFFSET
488 SET_MARK_OFFSET; 993 SET_MARK_OFFSET;
489#endif 994#endif
490 995
491 New(54,PL_scopestack,16,I32); 996 New(54,PL_scopestack,8,I32);
492 PL_scopestack_ix = 0; 997 PL_scopestack_ix = 0;
493 PL_scopestack_max = 16; 998 PL_scopestack_max = 8;
999#if HAS_SCOPESTACK_NAME
1000 New(54,PL_scopestack_name,8,const char*);
1001#endif
494 1002
495 New(54,PL_savestack,64,ANY); 1003 New(54,PL_savestack,24,ANY);
496 PL_savestack_ix = 0; 1004 PL_savestack_ix = 0;
497 PL_savestack_max = 64; 1005 PL_savestack_max = 24;
1006#if PERL_VERSION_ATLEAST (5,24,0)
1007 /* perl 5.24 moves SS_MAXPUSH optimisation from */
1008 /* the header macros to PL_savestack_max */
1009 PL_savestack_max -= SS_MAXPUSH;
1010#endif
498 1011
499#if !PERL_VERSION_ATLEAST (5,9,0) 1012#if !PERL_VERSION_ATLEAST (5,10,0)
500 New(54,PL_retstack,4,OP*); 1013 New(54,PL_retstack,4,OP*);
501 PL_retstack_ix = 0; 1014 PL_retstack_ix = 0;
502 PL_retstack_max = 4; 1015 PL_retstack_max = 4;
503#endif 1016#endif
504} 1017}
… …
506 1019
507/* 1020/*
508 * destroy the stacks, the callchain etc... 1021 * destroy the stacks, the callchain etc...
509 */ 1022 */
510static void 1023static void
511coro_destroy_stacks (pTHX) 1024coro_destruct_stacks (pTHX)
512{ 1025{
513 if (!IN_DESTRUCT)
514 {
515 /* restore all saved variables and stuff */
516 LEAVE_SCOPE (0);
517 assert (PL_tmps_floor == -1);
518
519 /* free all temporaries */
520 FREETMPS;
521 assert (PL_tmps_ix == -1);
522
523 /* unwind all extra stacks */
524 POPSTACK_TO (PL_mainstack);
525
526 /* unwind main stack */
527 dounwind (-1);
528 }
529
530 while (PL_curstackinfo->si_next) 1026 while (PL_curstackinfo->si_next)
531 PL_curstackinfo = PL_curstackinfo->si_next; 1027 PL_curstackinfo = PL_curstackinfo->si_next;
532 1028
533 while (PL_curstackinfo) 1029 while (PL_curstackinfo)
534 { 1030 {
… …
543 } 1039 }
544 1040
545 Safefree (PL_tmps_stack); 1041 Safefree (PL_tmps_stack);
546 Safefree (PL_markstack); 1042 Safefree (PL_markstack);
547 Safefree (PL_scopestack); 1043 Safefree (PL_scopestack);
1044#if HAS_SCOPESTACK_NAME
1045 Safefree (PL_scopestack_name);
1046#endif
548 Safefree (PL_savestack); 1047 Safefree (PL_savestack);
549#if !PERL_VERSION_ATLEAST (5,9,0) 1048#if !PERL_VERSION_ATLEAST (5,10,0)
550 Safefree (PL_retstack); 1049 Safefree (PL_retstack);
551#endif 1050#endif
552} 1051}
553 1052
1053#define CORO_RSS \
1054 rss += sizeof (SYM (curstackinfo)); \
1055 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
1056 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
1057 rss += SYM (tmps_max) * sizeof (SV *); \
1058 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
1059 rss += SYM (scopestack_max) * sizeof (I32); \
1060 rss += SYM (savestack_max) * sizeof (ANY);
1061
554static size_t 1062static size_t
555coro_rss (struct coro *coro) 1063coro_rss (pTHX_ struct coro *coro)
556{ 1064{
557 size_t rss = sizeof (coro); 1065 size_t rss = sizeof (*coro);
558 1066
559 if (coro->mainstack) 1067 if (coro->mainstack)
560 { 1068 {
561 if (coro->flags & CF_RUNNING) 1069 if (coro->flags & CF_RUNNING)
562 { 1070 {
563 #define VAR(name,type)coro->name = PL_ ## name; 1071 #define SYM(sym) PL_ ## sym
564 # include "state.h" 1072 CORO_RSS;
565 #undef VAR 1073 #undef SYM
566 } 1074 }
567 1075 else
568 rss += sizeof (coro->curstackinfo); 1076 {
569 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *); 1077 #define SYM(sym) coro->slot->sym
570 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 1078 CORO_RSS;
571 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *); 1079 #undef SYM
572 rss += coro->tmps_max * sizeof (SV *); 1080 }
573 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
574 rss += coro->scopestack_max * sizeof (I32);
575 rss += coro->savestack_max * sizeof (ANY);
576
577#if !PERL_VERSION_ATLEAST (5,9,0)
578 rss += coro->retstack_max * sizeof (OP *);
579#endif
580 } 1081 }
581 1082
582 return rss; 1083 return rss;
583} 1084}
584 1085
1086/** provide custom get/set/clear methods for %SIG elements ******************/
1087
1088/* apparently < 5.8.8 */
1089#ifndef MgPV_nolen_const
1090#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
1091 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
1092 (const char*)(mg)->mg_ptr)
1093#endif
1094
1095/* this will be a patched copy of PL_vtbl_sigelem */
1096static MGVTBL coro_sigelem_vtbl;
1097
1098static int ecb_cold
1099coro_sig_copy (pTHX_ SV *sv, MAGIC *mg, SV *nsv, const char *name, I32 namlen)
1100{
1101 char *key = SvPV_nolen ((SV *)name);
1102
1103 /* do what mg_copy normally does */
1104 sv_magic (nsv, mg->mg_obj, PERL_MAGIC_sigelem, name, namlen);
1105 assert (mg_find (nsv, PERL_MAGIC_sigelem)->mg_virtual == &PL_vtbl_sigelem);
1106
1107 /* patch sigelem vtbl, but only for __WARN__ and __DIE__ */
1108 if (*key == '_'
1109 && (strEQ (key, "__DIE__")
1110 || strEQ (key, "__WARN__")))
1111 mg_find (nsv, PERL_MAGIC_sigelem)->mg_virtual = &coro_sigelem_vtbl;
1112
1113 return 1;
1114}
1115
1116/* perl does not have a %SIG vtbl, we provide one so we can override */
1117/* the magic vtbl for the __DIE__ and __WARN__ members */
1118static const MGVTBL coro_sig_vtbl = {
1119 0, 0, 0, 0, 0,
1120 coro_sig_copy
1121};
1122
1123/*
1124 * This overrides the default magic get method of %SIG elements.
1125 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
1126 * and instead of trying to save and restore the hash elements (extremely slow),
1127 * we just provide our own readback here.
1128 */
1129static int ecb_cold
1130coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
1131{
1132 const char *s = MgPV_nolen_const (mg);
1133 /* the key must be either __DIE__ or __WARN__ here */
1134 SV **svp = s[2] == 'D' ? &PL_diehook : &PL_warnhook;
1135
1136 SV *ssv;
1137
1138 if (!*svp)
1139 ssv = &PL_sv_undef;
1140 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1141 ssv = sv_2mortal (newRV_inc (*svp));
1142 else
1143 ssv = *svp;
1144
1145 sv_setsv (sv, ssv);
1146 return 0;
1147}
1148
1149static int ecb_cold
1150coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1151{
1152 const char *s = MgPV_nolen_const (mg);
1153 /* the key must be either __DIE__ or __WARN__ here */
1154 SV **svp = s[2] == 'D' ? &PL_diehook : &PL_warnhook;
1155
1156 SV *old = *svp;
1157 *svp = 0;
1158 SvREFCNT_dec (old);
1159 return 0;
1160}
1161
1162static int ecb_cold
1163coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1164{
1165 const char *s = MgPV_nolen_const (mg);
1166 /* the key must be either __DIE__ or __WARN__ here */
1167 SV **svp = s[2] == 'D' ? &PL_diehook : &PL_warnhook;
1168
1169 SV *old = *svp;
1170 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1171 SvREFCNT_dec (old);
1172 return 0;
1173}
1174
1175static void
1176prepare_nop (pTHX_ struct coro_transfer_args *ta)
1177{
1178 /* kind of mega-hacky, but works */
1179 ta->next = ta->prev = (struct coro *)ta;
1180}
1181
1182static int
1183slf_check_nop (pTHX_ struct CoroSLF *frame)
1184{
1185 return 0;
1186}
1187
1188static int
1189slf_check_repeat (pTHX_ struct CoroSLF *frame)
1190{
1191 return 1;
1192}
1193
585/** coroutine stack handling ************************************************/ 1194/** coroutine stack handling ************************************************/
586 1195
587static void 1196static UNOP init_perl_op;
1197
1198ecb_noinline static void /* noinline to keep it out of the transfer fast path */
588setup_coro (pTHX_ struct coro *coro) 1199init_perl (pTHX_ struct coro *coro)
589{ 1200{
590 /* 1201 /*
591 * emulate part of the perl startup here. 1202 * emulate part of the perl startup here.
592 */ 1203 */
593 coro_init_stacks (aTHX); 1204 coro_init_stacks (aTHX);
594 1205
1206 PL_runops = RUNOPS_DEFAULT;
595 PL_curcop = &PL_compiling; 1207 PL_curcop = &PL_compiling;
596 PL_in_eval = EVAL_NULL; 1208 PL_in_eval = EVAL_NULL;
597 PL_comppad = 0; 1209 PL_comppad = 0;
1210 PL_comppad_name = 0;
1211 PL_comppad_name_fill = 0;
1212 PL_comppad_name_floor = 0;
598 PL_curpm = 0; 1213 PL_curpm = 0;
1214 PL_curpad = 0;
599 PL_localizing = 0; 1215 PL_localizing = 0;
600 PL_dirty = 0;
601 PL_restartop = 0; 1216 PL_restartop = 0;
1217#if PERL_VERSION_ATLEAST (5,10,0)
1218 PL_parser = 0;
1219#endif
1220 PL_hints = 0;
1221
1222 /* recreate the die/warn hooks */
1223 PL_diehook = SvREFCNT_inc (rv_diehook);
1224 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1225
1226 GvSV (PL_defgv) = newSV (0);
1227 GvAV (PL_defgv) = coro->args; coro->args = 0;
1228 GvSV (PL_errgv) = newSV (0);
1229 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1230 GvHV (PL_hintgv) = newHV ();
1231#if PERL_VERSION_ATLEAST (5,10,0)
1232 hv_magic (GvHV (PL_hintgv), 0, PERL_MAGIC_hints);
1233#endif
1234 PL_rs = newSVsv (GvSV (irsgv));
1235 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
602 1236
603 { 1237 {
604 dSP; 1238 dSP;
605 LOGOP myop; 1239 UNOP myop;
606 1240
607 SvREFCNT_dec (GvAV (PL_defgv));
608 GvAV (PL_defgv) = coro->args; coro->args = 0;
609
610 Zero (&myop, 1, LOGOP); 1241 Zero (&myop, 1, UNOP);
611 myop.op_next = Nullop; 1242 myop.op_next = Nullop;
1243 myop.op_type = OP_ENTERSUB;
612 myop.op_flags = OPf_WANT_VOID; 1244 myop.op_flags = OPf_WANT_VOID;
613 1245
614 PUSHMARK (SP); 1246 PUSHMARK (SP);
615 XPUSHs (av_shift (GvAV (PL_defgv))); 1247 XPUSHs ((SV *)coro->startcv);
616 PUTBACK; 1248 PUTBACK;
617 PL_op = (OP *)&myop; 1249 PL_op = (OP *)&myop;
618 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1250 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
619 SPAGAIN;
620 } 1251 }
621 1252
622 ENTER; /* necessary e.g. for dounwind */ 1253 /* this newly created coroutine might be run on an existing cctx which most
623} 1254 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1255 */
1256 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1257 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1258 slf_frame.destroy = 0;
624 1259
1260 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1261 init_perl_op.op_next = PL_op;
1262 init_perl_op.op_type = OP_ENTERSUB;
1263 init_perl_op.op_ppaddr = pp_slf;
1264 /* no flags etc. required, as an init function won't be called */
1265
1266 PL_op = (OP *)&init_perl_op;
1267
1268 /* copy throw, in case it was set before init_perl */
1269 CORO_THROW = coro->except;
1270
1271 SWAP_SVS_ENTER (coro);
1272
1273 if (ecb_expect_false (enable_times))
1274 {
1275 coro_times_update ();
1276 coro_times_sub (coro);
1277 }
1278}
1279
625static void 1280static void
1281coro_unwind_stacks (pTHX)
1282{
1283 if (!IN_DESTRUCT)
1284 {
1285 /* restore all saved variables and stuff */
1286 LEAVE_SCOPE (0);
1287 assert (PL_tmps_floor == -1);
1288
1289 /* free all temporaries */
1290 FREETMPS;
1291 assert (PL_tmps_ix == -1);
1292
1293 /* unwind all extra stacks */
1294 POPSTACK_TO (PL_mainstack);
1295
1296 /* unwind main stack */
1297 dounwind (-1);
1298 }
1299}
1300
1301static void
1302destroy_perl (pTHX_ struct coro *coro)
1303{
1304 SV *svf [9];
1305
1306 {
1307 SV *old_current = SvRV (coro_current);
1308 struct coro *current = SvSTATE (old_current);
1309
1310 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1311
1312 save_perl (aTHX_ current);
1313
1314 /* this will cause transfer_check to croak on block */
1315 SvRV_set (coro_current, (SV *)coro->hv);
1316
1317 load_perl (aTHX_ coro);
1318
1319 /* restore swapped sv's */
1320 SWAP_SVS_LEAVE (coro);
1321
1322 coro_unwind_stacks (aTHX);
1323
1324 coro_destruct_stacks (aTHX);
1325
1326 /* now save some sv's to be free'd later */
1327 svf [0] = GvSV (PL_defgv);
1328 svf [1] = (SV *)GvAV (PL_defgv);
1329 svf [2] = GvSV (PL_errgv);
1330 svf [3] = (SV *)PL_defoutgv;
1331 svf [4] = PL_rs;
1332 svf [5] = GvSV (irsgv);
1333 svf [6] = (SV *)GvHV (PL_hintgv);
1334 svf [7] = PL_diehook;
1335 svf [8] = PL_warnhook;
1336 assert (9 == sizeof (svf) / sizeof (*svf));
1337
1338 SvRV_set (coro_current, old_current);
1339
1340 load_perl (aTHX_ current);
1341 }
1342
1343 {
1344 unsigned int i;
1345
1346 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1347 SvREFCNT_dec (svf [i]);
1348
1349 SvREFCNT_dec (coro->saved_deffh);
1350 SvREFCNT_dec (coro->rouse_cb);
1351 SvREFCNT_dec (coro->invoke_cb);
1352 SvREFCNT_dec (coro->invoke_av);
1353 SvREFCNT_dec (coro->on_enter_xs);
1354 SvREFCNT_dec (coro->on_leave_xs);
1355 }
1356}
1357
1358ecb_inline void
626free_coro_mortal (pTHX) 1359free_coro_mortal (pTHX)
627{ 1360{
628 if (coro_mortal) 1361 if (ecb_expect_true (coro_mortal))
629 { 1362 {
630 SvREFCNT_dec (coro_mortal); 1363 SvREFCNT_dec ((SV *)coro_mortal);
631 coro_mortal = 0; 1364 coro_mortal = 0;
632 } 1365 }
633} 1366}
634 1367
635static void
636do_trace (pTHX)
637{
638 if (PL_curcop != &PL_compiling)
639 {
640 runops_proc_t old_runops = PL_runops;
641 dSP;
642 ENTER;
643 SAVETMPS;
644 PUSHMARK (SP);
645 PUTBACK;
646 PL_runops = RUNOPS_DEFAULT;
647 call_pv ("Coro::_do_trace", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD | G_NOARGS);
648 PL_runops = old_runops;
649 SPAGAIN;
650 FREETMPS;
651 LEAVE;
652 PUTBACK;
653 }
654}
655
656static int 1368static int
657runops_coro (pTHX) 1369runops_trace (pTHX)
658{ 1370{
659 COP *oldcop = 0; 1371 COP *oldcop = 0;
1372 int oldcxix = -2;
660 1373
661 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1374 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
662 { 1375 {
663 PERL_ASYNC_CHECK (); 1376 PERL_ASYNC_CHECK ();
664 1377
665 if (oldcop != PL_curcop) 1378 if (cctx_current->flags & CC_TRACE_ALL)
666 { 1379 {
1380 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1381 {
1382 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1383 SV **bot, **top;
1384 AV *av = newAV (); /* return values */
1385 SV **cb;
1386 dSP;
1387
1388 GV *gv = CvGV (cx->blk_sub.cv);
1389 SV *fullname = sv_2mortal (newSV (0));
1390 if (isGV (gv))
1391 gv_efullname3 (fullname, gv, 0);
1392
1393 bot = PL_stack_base + cx->blk_oldsp + 1;
1394 top = cx->blk_gimme == G_ARRAY ? SP + 1
1395 : cx->blk_gimme == G_SCALAR ? bot + 1
1396 : bot;
1397
1398 av_extend (av, top - bot);
1399 while (bot < top)
1400 av_push (av, SvREFCNT_inc_NN (*bot++));
1401
1402 PL_runops = RUNOPS_DEFAULT;
1403 ENTER;
1404 SAVETMPS;
1405 PUSHMARK (SP);
1406 EXTEND (SP, 3);
1407 PUSHs (&PL_sv_no);
1408 PUSHs (fullname);
1409 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1410 PUTBACK;
1411 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1412 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1413 SPAGAIN;
1414 FREETMPS;
1415 LEAVE;
1416 PL_runops = runops_trace;
1417 }
1418
1419 if (oldcop != PL_curcop)
1420 {
667 oldcop = PL_curcop; 1421 oldcop = PL_curcop;
668 do_trace (aTHX); 1422
1423 if (PL_curcop != &PL_compiling)
1424 {
1425 SV **cb;
1426
1427 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB && cxstack_ix >= 0)
1428 {
1429 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1430
1431 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1432 {
1433 dSP;
1434 GV *gv = CvGV (cx->blk_sub.cv);
1435 SV *fullname = sv_2mortal (newSV (0));
1436
1437 if (isGV (gv))
1438 gv_efullname3 (fullname, gv, 0);
1439
1440 PL_runops = RUNOPS_DEFAULT;
1441 ENTER;
1442 SAVETMPS;
1443 PUSHMARK (SP);
1444 EXTEND (SP, 3);
1445 PUSHs (&PL_sv_yes);
1446 PUSHs (fullname);
1447 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc (SUB_ARGARRAY)) : &PL_sv_undef);
1448 PUTBACK;
1449 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1450 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1451 SPAGAIN;
1452 FREETMPS;
1453 LEAVE;
1454 PL_runops = runops_trace;
1455 }
1456
1457 oldcxix = cxstack_ix;
1458 }
1459
1460 if (cctx_current->flags & CC_TRACE_LINE)
1461 {
1462 dSP;
1463
1464 PL_runops = RUNOPS_DEFAULT;
1465 ENTER;
1466 SAVETMPS;
1467 PUSHMARK (SP);
1468 EXTEND (SP, 2);
1469 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1470 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1471 PUTBACK;
1472 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1473 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1474 SPAGAIN;
1475 FREETMPS;
1476 LEAVE;
1477 PL_runops = runops_trace;
1478 }
1479 }
1480 }
669 } 1481 }
670 } 1482 }
671 1483
672 TAINT_NOT; 1484 TAINT_NOT;
673 return 0; 1485 return 0;
674} 1486}
675 1487
676/* inject a fake call to Coro::State::_cctx_init into the execution */ 1488static struct CoroSLF cctx_ssl_frame;
677/* _cctx_init should be careful, as it could be called at almost any time */
678/* during execution of a perl program */
679static void NOINLINE
680prepare_cctx (pTHX_ coro_cctx *cctx)
681{
682 dSP;
683 LOGOP myop;
684 1489
1490static void
1491slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1492{
1493 ta->prev = 0;
1494}
1495
1496static int
1497slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1498{
1499 *frame = cctx_ssl_frame;
1500
1501 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1502}
1503
1504/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1505static void ecb_noinline
1506cctx_prepare (pTHX)
1507{
685 PL_top_env = &PL_start_env; 1508 PL_top_env = &PL_start_env;
686 1509
687 if (cctx->flags & CC_TRACE) 1510 if (cctx_current->flags & CC_TRACE)
688 PL_runops = runops_coro; 1511 PL_runops = runops_trace;
689 1512
690 Zero (&myop, 1, LOGOP); 1513 /* we already must be executing an SLF op, there is no other valid way
691 myop.op_next = PL_op; 1514 * that can lead to creation of a new cctx */
692 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1515 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1516 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
693 1517
694 PUSHMARK (SP); 1518 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
695 EXTEND (SP, 2); 1519 cctx_ssl_frame = slf_frame;
696 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1520
697 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1521 slf_frame.prepare = slf_prepare_set_stacklevel;
698 PUTBACK; 1522 slf_frame.check = slf_check_set_stacklevel;
699 PL_op = (OP *)&myop; 1523}
700 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1524
701 SPAGAIN; 1525/* the tail of transfer: execute stuff we can only do after a transfer */
1526ecb_inline void
1527transfer_tail (pTHX)
1528{
1529 free_coro_mortal (aTHX);
1530}
1531
1532/* try to exit the same way perl's main function would do */
1533/* we do not bother resetting the environment or other things *7
1534/* that are not, uhm, essential */
1535/* this obviously also doesn't work when perl is embedded */
1536static void ecb_noinline ecb_cold
1537perlish_exit (pTHX)
1538{
1539 int exitstatus = perl_destruct (PL_curinterp);
1540 perl_free (PL_curinterp);
1541 exit (exitstatus);
702} 1542}
703 1543
704/* 1544/*
705 * this is a _very_ stripped down perl interpreter ;) 1545 * this is a _very_ stripped down perl interpreter ;)
706 */ 1546 */
707static void 1547static void
708coro_run (void *arg) 1548cctx_run (void *arg)
709{ 1549{
1550#ifdef USE_ITHREADS
1551# if CORO_PTHREAD
1552 PERL_SET_CONTEXT (coro_thx);
1553# endif
1554#endif
1555 {
710 dTHX; 1556 dTHX;
711 1557
712 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1558 /* normally we would need to skip the entersub here */
713 UNLOCK; 1559 /* not doing so will re-execute it, which is exactly what we want */
714
715 /* we now skip the entersub that lead to transfer() */
716 PL_op = PL_op->op_next; 1560 /* PL_nop = PL_nop->op_next */
717 1561
718 /* inject a fake subroutine call to cctx_init */ 1562 /* inject a fake subroutine call to cctx_init */
719 prepare_cctx (aTHX_ (coro_cctx *)arg); 1563 cctx_prepare (aTHX);
720 1564
1565 /* cctx_run is the alternative tail of transfer() */
1566 transfer_tail (aTHX);
1567
721 /* somebody or something will hit me for both perl_run and PL_restartop */ 1568 /* somebody or something will hit me for both perl_run and PL_restartop */
722 PL_restartop = PL_op; 1569 PL_restartop = PL_op;
723 perl_run (PL_curinterp); 1570 perl_run (PL_curinterp);
724
725 /* 1571 /*
1572 * Unfortunately, there is no way to get at the return values of the
1573 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1574 * runtime errors here, as this is just a random interpreter, not a thread.
1575 */
1576
1577 /*
1578 * pp_entersub in 5.24 no longer ENTERs, but perl_destruct
1579 * requires PL_scopestack_ix, so do it here if required.
1580 */
1581 if (!PL_scopestack_ix)
1582 ENTER;
1583
1584 /*
726 * If perl-run returns we assume exit() was being called or the coro 1585 * If perl-run returns we assume exit() was being called or the coro
727 * fell off the end, which seems to be the only valid (non-bug) 1586 * fell off the end, which seems to be the only valid (non-bug)
728 * reason for perl_run to return. We try to exit by jumping to the 1587 * reason for perl_run to return. We try to mimic whatever perl is normally
729 * bootstrap-time "top" top_env, as we cannot restore the "main" 1588 * doing in that case. YMMV.
730 * coroutine as Coro has no such concept
731 */ 1589 */
732 PL_top_env = main_top_env; 1590 perlish_exit (aTHX);
733 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1591 }
734} 1592}
735 1593
736static coro_cctx * 1594static coro_cctx *
737cctx_new () 1595cctx_new (void)
738{ 1596{
739 coro_cctx *cctx; 1597 coro_cctx *cctx;
740 void *stack_start;
741 size_t stack_size;
742 1598
743 ++cctx_count; 1599 ++cctx_count;
744
745 Newz (0, cctx, 1, coro_cctx); 1600 New (0, cctx, 1, coro_cctx);
746 1601
747#if HAVE_MMAP 1602 cctx->gen = cctx_gen;
1603 cctx->flags = 0;
1604 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
748 1605
749 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1606 return cctx;
750 /* mmap supposedly does allocate-on-write for us */ 1607}
751 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
752 1608
753 if (cctx->sptr != (void *)-1) 1609/* create a new cctx only suitable as source */
754 { 1610static coro_cctx *
755# if CORO_STACKGUARD 1611cctx_new_empty (void)
756 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1612{
757# endif 1613 coro_cctx *cctx = cctx_new ();
758 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1614
759 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1615 cctx->stack.sptr = 0;
760 cctx->flags |= CC_MAPPED; 1616 coro_create (&cctx->cctx, 0, 0, 0, 0);
1617
1618 return cctx;
1619}
1620
1621/* create a new cctx suitable as destination/running a perl interpreter */
1622static coro_cctx *
1623cctx_new_run (void)
1624{
1625 coro_cctx *cctx = cctx_new ();
1626
1627 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
761 } 1628 {
762 else
763#endif
764 {
765 cctx->ssize = coro_stacksize * (long)sizeof (long);
766 New (0, cctx->sptr, coro_stacksize, long);
767
768 if (!cctx->sptr)
769 {
770 perror ("FATAL: unable to allocate stack for coroutine"); 1629 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
771 _exit (EXIT_FAILURE); 1630 _exit (EXIT_FAILURE);
772 }
773
774 stack_start = cctx->sptr;
775 stack_size = cctx->ssize;
776 } 1631 }
777 1632
778 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
779 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1633 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
780 1634
781 return cctx; 1635 return cctx;
782} 1636}
783 1637
784static void 1638static void
785cctx_destroy (coro_cctx *cctx) 1639cctx_destroy (coro_cctx *cctx)
786{ 1640{
787 if (!cctx) 1641 if (!cctx)
788 return; 1642 return;
789 1643
1644 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1645
790 --cctx_count; 1646 --cctx_count;
1647 coro_destroy (&cctx->cctx);
791 1648
792#if CORO_USE_VALGRIND 1649 coro_stack_free (&cctx->stack);
793 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
794#endif
795
796#if HAVE_MMAP
797 if (cctx->flags & CC_MAPPED)
798 munmap (cctx->sptr, cctx->ssize);
799 else
800#endif
801 Safefree (cctx->sptr);
802 1650
803 Safefree (cctx); 1651 Safefree (cctx);
804} 1652}
1653
1654/* wether this cctx should be destructed */
1655#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
805 1656
806static coro_cctx * 1657static coro_cctx *
807cctx_get (pTHX) 1658cctx_get (pTHX)
808{ 1659{
809 while (cctx_first) 1660 while (ecb_expect_true (cctx_first))
810 { 1661 {
811 coro_cctx *cctx = cctx_first; 1662 coro_cctx *cctx = cctx_first;
812 cctx_first = cctx->next; 1663 cctx_first = cctx->next;
813 --cctx_idle; 1664 --cctx_idle;
814 1665
815 if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE)) 1666 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
816 return cctx; 1667 return cctx;
817 1668
818 cctx_destroy (cctx); 1669 cctx_destroy (cctx);
819 } 1670 }
820 1671
821 return cctx_new (); 1672 return cctx_new_run ();
822} 1673}
823 1674
824static void 1675static void
825cctx_put (coro_cctx *cctx) 1676cctx_put (coro_cctx *cctx)
826{ 1677{
1678 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1679
827 /* free another cctx if overlimit */ 1680 /* free another cctx if overlimit */
828 if (cctx_idle >= MAX_IDLE_CCTX) 1681 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
829 { 1682 {
830 coro_cctx *first = cctx_first; 1683 coro_cctx *first = cctx_first;
831 cctx_first = first->next; 1684 cctx_first = first->next;
832 --cctx_idle; 1685 --cctx_idle;
833 1686
… …
839 cctx_first = cctx; 1692 cctx_first = cctx;
840} 1693}
841 1694
842/** coroutine switching *****************************************************/ 1695/** coroutine switching *****************************************************/
843 1696
844/* never call directly, always through the coro_state_transfer global variable */ 1697static void
845static void NOINLINE
846transfer (pTHX_ struct coro *prev, struct coro *next) 1698transfer_check (pTHX_ struct coro *prev, struct coro *next)
1699{
1700 /* TODO: throwing up here is considered harmful */
1701
1702 if (ecb_expect_true (prev != next))
1703 {
1704 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1705 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1706
1707 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1708 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1709
1710#if !PERL_VERSION_ATLEAST (5,10,0)
1711 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1712 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1713#endif
1714 }
1715}
1716
1717/* always use the TRANSFER macro */
1718static void ecb_noinline /* noinline so we have a fixed stackframe */
1719transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
847{ 1720{
848 dSTACKLEVEL; 1721 dSTACKLEVEL;
849 1722
850 /* sometimes transfer is only called to set idle_sp */ 1723 /* sometimes transfer is only called to set idle_sp */
851 if (!next) 1724 if (ecb_expect_false (!prev))
852 { 1725 {
853 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1726 cctx_current->idle_sp = STACKLEVEL;
854 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1727 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
855 }
856 else if (prev != next)
857 { 1728 }
1729 else if (ecb_expect_true (prev != next))
1730 {
858 coro_cctx *prev__cctx; 1731 coro_cctx *cctx_prev;
859 1732
860 if (prev->flags & CF_NEW) 1733 if (ecb_expect_false (prev->flags & CF_NEW))
861 { 1734 {
862 /* create a new empty context */ 1735 /* create a new empty/source context */
863 Newz (0, prev->cctx, 1, coro_cctx);
864 prev->flags &= ~CF_NEW; 1736 prev->flags &= ~CF_NEW;
865 prev->flags |= CF_RUNNING; 1737 prev->flags |= CF_RUNNING;
866 } 1738 }
867 1739
868 /*TODO: must not croak here */
869 if (!prev->flags & CF_RUNNING)
870 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
871
872 if (next->flags & CF_RUNNING)
873 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
874
875 if (next->flags & CF_DESTROYED)
876 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
877
878 prev->flags &= ~CF_RUNNING; 1740 prev->flags &= ~CF_RUNNING;
879 next->flags |= CF_RUNNING; 1741 next->flags |= CF_RUNNING;
880 1742
881 LOCK; 1743 /* first get rid of the old state */
1744 save_perl (aTHX_ prev);
882 1745
883 if (next->flags & CF_NEW) 1746 if (ecb_expect_false (next->flags & CF_NEW))
884 { 1747 {
885 /* need to start coroutine */ 1748 /* need to start coroutine */
886 next->flags &= ~CF_NEW; 1749 next->flags &= ~CF_NEW;
887 /* first get rid of the old state */
888 save_perl (aTHX_ prev);
889 /* setup coroutine call */ 1750 /* setup coroutine call */
890 setup_coro (aTHX_ next); 1751 init_perl (aTHX_ next);
891 } 1752 }
892 else 1753 else
1754 load_perl (aTHX_ next);
1755
1756 /* possibly untie and reuse the cctx */
1757 if (ecb_expect_true (
1758 cctx_current->idle_sp == STACKLEVEL
1759 && !(cctx_current->flags & CC_TRACE)
1760 && !force_cctx
1761 ))
893 { 1762 {
894 /* coroutine already started */ 1763 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
895 save_perl (aTHX_ prev); 1764 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
896 load_perl (aTHX_ next); 1765
1766 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1767 /* without this the next cctx_get might destroy the running cctx while still in use */
1768 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1769 if (ecb_expect_true (!next->cctx))
1770 next->cctx = cctx_get (aTHX);
1771
1772 cctx_put (cctx_current);
897 } 1773 }
1774 else
1775 prev->cctx = cctx_current;
898 1776
899 prev__cctx = prev->cctx; 1777 ++next->usecount;
900 1778
901 /* possibly "free" the cctx */ 1779 cctx_prev = cctx_current;
902 if (prev__cctx->idle_sp == STACKLEVEL) 1780 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1781
1782 next->cctx = 0;
1783
1784 if (ecb_expect_false (cctx_prev != cctx_current))
903 { 1785 {
904 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1786 cctx_prev->top_env = PL_top_env;
905 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1787 PL_top_env = cctx_current->top_env;
906 1788 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
907 prev->cctx = 0;
908
909 cctx_put (prev__cctx);
910 } 1789 }
911 1790
912 if (!next->cctx) 1791 transfer_tail (aTHX);
913 next->cctx = cctx_get (aTHX);
914
915 if (prev__cctx != next->cctx)
916 {
917 prev__cctx->top_env = PL_top_env;
918 PL_top_env = next->cctx->top_env;
919 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
920 }
921
922 free_coro_mortal (aTHX);
923 UNLOCK;
924 } 1792 }
925} 1793}
926 1794
927struct transfer_args 1795#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
928{
929 struct coro *prev, *next;
930};
931
932#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1796#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
933 1797
934/** high level stuff ********************************************************/ 1798/** high level stuff ********************************************************/
935 1799
1800/* this function is actually Coro, not Coro::State, but we call it from here */
1801/* because it is convenient - but it hasn't been declared yet for that reason */
936static int 1802static void
1803coro_call_on_destroy (pTHX_ struct coro *coro);
1804
1805static void
937coro_state_destroy (pTHX_ struct coro *coro) 1806coro_state_destroy (pTHX_ struct coro *coro)
938{ 1807{
939 if (coro->flags & CF_DESTROYED) 1808 if (coro->flags & CF_ZOMBIE)
940 return 0; 1809 return;
941 1810
1811 slf_destroy (aTHX_ coro);
1812
942 coro->flags |= CF_DESTROYED; 1813 coro->flags |= CF_ZOMBIE;
943 1814
944 if (coro->flags & CF_READY) 1815 if (coro->flags & CF_READY)
945 { 1816 {
946 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1817 /* reduce nready, as destroying a ready coro effectively unreadies it */
947 /* alternative: look through all ready queues and remove the coro */ 1818 /* alternative: look through all ready queues and remove the coro */
948 LOCK;
949 --coro_nready; 1819 --coro_nready;
950 UNLOCK;
951 } 1820 }
952 else 1821 else
953 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1822 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
954
955 if (coro->mainstack && coro->mainstack != main_mainstack)
956 {
957 struct coro temp;
958
959 assert (!(coro->flags & CF_RUNNING));
960
961 Zero (&temp, 1, struct coro);
962 temp.save = CORO_SAVE_ALL;
963
964 if (coro->flags & CF_RUNNING)
965 croak ("FATAL: tried to destroy currently running coroutine");
966
967 save_perl (aTHX_ &temp);
968 load_perl (aTHX_ coro);
969
970 coro_destroy_stacks (aTHX);
971
972 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
973
974 coro->mainstack = 0;
975 }
976
977 cctx_destroy (coro->cctx);
978 SvREFCNT_dec (coro->args);
979 1823
980 if (coro->next) coro->next->prev = coro->prev; 1824 if (coro->next) coro->next->prev = coro->prev;
981 if (coro->prev) coro->prev->next = coro->next; 1825 if (coro->prev) coro->prev->next = coro->next;
982 if (coro == coro_first) coro_first = coro->next; 1826 if (coro == coro_first) coro_first = coro->next;
983 1827
984 return 1; 1828 if (coro->mainstack
1829 && coro->mainstack != main_mainstack
1830 && coro->slot
1831 && !PL_dirty)
1832 destroy_perl (aTHX_ coro);
1833
1834 cctx_destroy (coro->cctx);
1835 SvREFCNT_dec (coro->startcv);
1836 SvREFCNT_dec (coro->args);
1837 SvREFCNT_dec (coro->swap_sv);
1838 SvREFCNT_dec (CORO_THROW);
1839
1840 coro_call_on_destroy (aTHX_ coro);
1841
1842 /* more destruction mayhem in coro_state_free */
985} 1843}
986 1844
987static int 1845static int
988coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1846coro_state_free (pTHX_ SV *sv, MAGIC *mg)
989{ 1847{
990 struct coro *coro = (struct coro *)mg->mg_ptr; 1848 struct coro *coro = (struct coro *)mg->mg_ptr;
1849
1850 coro_state_destroy (aTHX_ coro);
991 mg->mg_ptr = 0; 1851 mg->mg_ptr = 0;
992 1852
993 coro->hv = 0; 1853 SvREFCNT_dec (coro->on_destroy);
1854 SvREFCNT_dec (coro->status);
994 1855
995 if (--coro->refcnt < 0)
996 {
997 coro_state_destroy (aTHX_ coro);
998 Safefree (coro); 1856 Safefree (coro);
999 }
1000 1857
1001 return 0; 1858 return 0;
1002} 1859}
1003 1860
1004static int 1861static int ecb_cold
1005coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1862coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1006{ 1863{
1007 struct coro *coro = (struct coro *)mg->mg_ptr; 1864 /* called when perl clones the current process the slow way (windows process emulation) */
1008 1865 /* we simply nuke the pointers in the copy, causing perl to croak */
1009 ++coro->refcnt; 1866 mg->mg_ptr = 0;
1867 mg->mg_virtual = 0;
1010 1868
1011 return 0; 1869 return 0;
1012} 1870}
1013 1871
1014static MGVTBL coro_state_vtbl = { 1872static MGVTBL coro_state_vtbl = {
… …
1020#else 1878#else
1021# define MGf_DUP 0 1879# define MGf_DUP 0
1022#endif 1880#endif
1023}; 1881};
1024 1882
1025static struct coro *
1026SvSTATE_ (pTHX_ SV *coro)
1027{
1028 HV *stash;
1029 MAGIC *mg;
1030
1031 if (SvROK (coro))
1032 coro = SvRV (coro);
1033
1034 stash = SvSTASH (coro);
1035 if (stash != coro_stash && stash != coro_state_stash)
1036 {
1037 /* very slow, but rare, check */
1038 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
1039 croak ("Coro::State object required");
1040 }
1041
1042 mg = CORO_MAGIC (coro);
1043 return (struct coro *)mg->mg_ptr;
1044}
1045
1046#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
1047
1048static void 1883static void
1049prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1884prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1050{ 1885{
1051 ta->prev = SvSTATE (prev_sv); 1886 ta->prev = SvSTATE (prev_sv);
1052 ta->next = SvSTATE (next_sv); 1887 ta->next = SvSTATE (next_sv);
1888 TRANSFER_CHECK (*ta);
1053} 1889}
1054 1890
1055static void 1891static void
1056api_transfer (SV *prev_sv, SV *next_sv) 1892api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1893{
1894 struct coro_transfer_args ta;
1895
1896 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1897 TRANSFER (ta, 1);
1898}
1899
1900/** Coro ********************************************************************/
1901
1902ecb_inline void
1903coro_enq (pTHX_ struct coro *coro)
1904{
1905 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1906
1907 SvREFCNT_inc_NN (coro->hv);
1908
1909 coro->next_ready = 0;
1910 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1911 ready [1] = coro;
1912}
1913
1914ecb_inline struct coro *
1915coro_deq (pTHX)
1916{
1917 int prio;
1918
1919 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1920 {
1921 struct coro **ready = coro_ready [prio];
1922
1923 if (ready [0])
1924 {
1925 struct coro *coro = ready [0];
1926 ready [0] = coro->next_ready;
1927 return coro;
1928 }
1929 }
1930
1931 return 0;
1932}
1933
1934static void
1935invoke_sv_ready_hook_helper (void)
1057{ 1936{
1058 dTHX; 1937 dTHX;
1059 struct transfer_args ta; 1938 dSP;
1060 1939
1061 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1940 ENTER;
1062 TRANSFER (ta); 1941 SAVETMPS;
1942
1943 PUSHMARK (SP);
1944 PUTBACK;
1945 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1946
1947 FREETMPS;
1948 LEAVE;
1063} 1949}
1064 1950
1065static int 1951static int
1066api_save (SV *coro_sv, int new_save) 1952api_ready (pTHX_ SV *coro_sv)
1067{ 1953{
1068 dTHX;
1069 struct coro *coro = SvSTATE (coro_sv); 1954 struct coro *coro = SvSTATE (coro_sv);
1070 int old_save = coro->save;
1071
1072 if (new_save >= 0)
1073 coro->save = new_save;
1074
1075 return old_save;
1076}
1077
1078/** Coro ********************************************************************/
1079
1080static void
1081coro_enq (pTHX_ SV *coro_sv)
1082{
1083 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1084}
1085
1086static SV *
1087coro_deq (pTHX_ int min_prio)
1088{
1089 int prio = PRIO_MAX - PRIO_MIN;
1090
1091 min_prio -= PRIO_MIN;
1092 if (min_prio < 0)
1093 min_prio = 0;
1094
1095 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1096 if (AvFILLp (coro_ready [prio]) >= 0)
1097 return av_shift (coro_ready [prio]);
1098
1099 return 0;
1100}
1101
1102static int
1103api_ready (SV *coro_sv)
1104{
1105 dTHX;
1106 struct coro *coro;
1107
1108 if (SvROK (coro_sv))
1109 coro_sv = SvRV (coro_sv);
1110
1111 coro = SvSTATE (coro_sv);
1112 1955
1113 if (coro->flags & CF_READY) 1956 if (coro->flags & CF_READY)
1114 return 0; 1957 return 0;
1115 1958
1116 coro->flags |= CF_READY; 1959 coro->flags |= CF_READY;
1117 1960
1118 LOCK; 1961 coro_enq (aTHX_ coro);
1119 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1962
1120 ++coro_nready; 1963 if (!coro_nready++)
1121 UNLOCK; 1964 if (coroapi.readyhook)
1965 coroapi.readyhook ();
1122 1966
1123 return 1; 1967 return 1;
1124} 1968}
1125 1969
1126static int 1970static int
1127api_is_ready (SV *coro_sv) 1971api_is_ready (pTHX_ SV *coro_sv)
1128{ 1972{
1129 dTHX;
1130 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1973 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1131} 1974}
1132 1975
1976/* expects to own a reference to next->hv */
1977ecb_inline void
1978prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1979{
1980 SV *prev_sv = SvRV (coro_current);
1981
1982 ta->prev = SvSTATE_hv (prev_sv);
1983 ta->next = next;
1984
1985 TRANSFER_CHECK (*ta);
1986
1987 SvRV_set (coro_current, (SV *)next->hv);
1988
1989 free_coro_mortal (aTHX);
1990 coro_mortal = prev_sv;
1991}
1992
1133static void 1993static void
1134prepare_schedule (pTHX_ struct transfer_args *ta) 1994prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1135{ 1995{
1136 SV *prev_sv, *next_sv;
1137
1138 for (;;) 1996 for (;;)
1139 { 1997 {
1140 LOCK; 1998 struct coro *next = coro_deq (aTHX);
1141 next_sv = coro_deq (aTHX_ PRIO_MIN);
1142 1999
2000 if (ecb_expect_true (next))
2001 {
2002 /* cannot transfer to destroyed coros, skip and look for next */
2003 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
2004 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
2005 else
2006 {
2007 next->flags &= ~CF_READY;
2008 --coro_nready;
2009
2010 prepare_schedule_to (aTHX_ ta, next);
2011 break;
2012 }
2013 }
2014 else
2015 {
1143 /* nothing to schedule: call the idle handler */ 2016 /* nothing to schedule: call the idle handler */
1144 if (!next_sv) 2017 if (SvROK (sv_idle)
2018 && SvOBJECT (SvRV (sv_idle)))
2019 {
2020 if (SvRV (sv_idle) == SvRV (coro_current))
2021 {
2022 require_pv ("Carp");
2023
2024 {
2025 dSP;
2026
2027 ENTER;
2028 SAVETMPS;
2029
2030 PUSHMARK (SP);
2031 XPUSHs (sv_2mortal (newSVpv ("FATAL: $Coro::idle blocked itself - did you try to block inside an event loop callback? Caught", 0)));
2032 PUTBACK;
2033 call_pv ("Carp::confess", G_VOID | G_DISCARD);
2034
2035 FREETMPS;
2036 LEAVE;
2037 }
2038 }
2039
2040 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
2041 api_ready (aTHX_ SvRV (sv_idle));
2042 --coro_nready;
2043 }
2044 else
2045 {
2046 /* TODO: deprecated, remove, cannot work reliably *//*D*/
2047 dSP;
2048
2049 ENTER;
2050 SAVETMPS;
2051
2052 PUSHMARK (SP);
2053 PUTBACK;
2054 call_sv (sv_idle, G_VOID | G_DISCARD);
2055
2056 FREETMPS;
2057 LEAVE;
2058 }
2059 }
2060 }
2061}
2062
2063ecb_inline void
2064prepare_cede (pTHX_ struct coro_transfer_args *ta)
2065{
2066 api_ready (aTHX_ coro_current);
2067 prepare_schedule (aTHX_ ta);
2068}
2069
2070ecb_inline void
2071prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
2072{
2073 SV *prev = SvRV (coro_current);
2074
2075 if (coro_nready)
2076 {
2077 prepare_schedule (aTHX_ ta);
2078 api_ready (aTHX_ prev);
2079 }
2080 else
2081 prepare_nop (aTHX_ ta);
2082}
2083
2084static void
2085api_schedule (pTHX)
2086{
2087 struct coro_transfer_args ta;
2088
2089 prepare_schedule (aTHX_ &ta);
2090 TRANSFER (ta, 1);
2091}
2092
2093static void
2094api_schedule_to (pTHX_ SV *coro_sv)
2095{
2096 struct coro_transfer_args ta;
2097 struct coro *next = SvSTATE (coro_sv);
2098
2099 SvREFCNT_inc_NN (coro_sv);
2100 prepare_schedule_to (aTHX_ &ta, next);
2101}
2102
2103static int
2104api_cede (pTHX)
2105{
2106 struct coro_transfer_args ta;
2107
2108 prepare_cede (aTHX_ &ta);
2109
2110 if (ecb_expect_true (ta.prev != ta.next))
2111 {
2112 TRANSFER (ta, 1);
2113 return 1;
2114 }
2115 else
2116 return 0;
2117}
2118
2119static int
2120api_cede_notself (pTHX)
2121{
2122 if (coro_nready)
2123 {
2124 struct coro_transfer_args ta;
2125
2126 prepare_cede_notself (aTHX_ &ta);
2127 TRANSFER (ta, 1);
2128 return 1;
2129 }
2130 else
2131 return 0;
2132}
2133
2134static void
2135api_trace (pTHX_ SV *coro_sv, int flags)
2136{
2137 struct coro *coro = SvSTATE (coro_sv);
2138
2139 if (coro->flags & CF_RUNNING)
2140 croak ("cannot enable tracing on a running coroutine, caught");
2141
2142 if (flags & CC_TRACE)
2143 {
2144 if (!coro->cctx)
2145 coro->cctx = cctx_new_run ();
2146 else if (!(coro->cctx->flags & CC_TRACE))
2147 croak ("cannot enable tracing on coroutine with custom stack, caught");
2148
2149 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2150 }
2151 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2152 {
2153 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2154
2155 if (coro->flags & CF_RUNNING)
2156 PL_runops = RUNOPS_DEFAULT;
2157 else
2158 coro->slot->runops = RUNOPS_DEFAULT;
2159 }
2160}
2161
2162static void
2163coro_push_av (pTHX_ AV *av, I32 gimme_v)
2164{
2165 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2166 {
2167 dSP;
2168
2169 if (gimme_v == G_SCALAR)
2170 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2171 else
2172 {
2173 int i;
2174 EXTEND (SP, AvFILLp (av) + 1);
2175
2176 for (i = 0; i <= AvFILLp (av); ++i)
2177 PUSHs (AvARRAY (av)[i]);
2178 }
2179
2180 PUTBACK;
2181 }
2182}
2183
2184static void
2185coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2186{
2187 if (!coro->on_destroy)
2188 coro->on_destroy = newAV ();
2189
2190 av_push (coro->on_destroy, cb);
2191}
2192
2193static void
2194slf_destroy_join (pTHX_ struct CoroSLF *frame)
2195{
2196 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2197}
2198
2199static int
2200slf_check_join (pTHX_ struct CoroSLF *frame)
2201{
2202 struct coro *coro = (struct coro *)frame->data;
2203
2204 if (!coro->status)
2205 return 1;
2206
2207 frame->destroy = 0;
2208
2209 coro_push_av (aTHX_ coro->status, GIMME_V);
2210
2211 SvREFCNT_dec ((SV *)coro->hv);
2212
2213 return 0;
2214}
2215
2216static void
2217slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2218{
2219 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2220
2221 if (items > 1)
2222 croak ("join called with too many arguments");
2223
2224 if (coro->status)
2225 frame->prepare = prepare_nop;
2226 else
2227 {
2228 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2229 frame->prepare = prepare_schedule;
2230 }
2231
2232 frame->check = slf_check_join;
2233 frame->destroy = slf_destroy_join;
2234 frame->data = (void *)coro;
2235 SvREFCNT_inc (coro->hv);
2236}
2237
2238static void
2239coro_call_on_destroy (pTHX_ struct coro *coro)
2240{
2241 AV *od = coro->on_destroy;
2242
2243 if (!od)
2244 return;
2245
2246 coro->on_destroy = 0;
2247 sv_2mortal ((SV *)od);
2248
2249 while (AvFILLp (od) >= 0)
2250 {
2251 SV *cb = sv_2mortal (av_pop (od));
2252
2253 /* coro hv's (and only hv's at the moment) are supported as well */
2254 if (SvSTATEhv_p (aTHX_ cb))
2255 api_ready (aTHX_ cb);
2256 else
2257 {
2258 dSP; /* don't disturb outer sp */
2259 PUSHMARK (SP);
2260
2261 if (coro->status)
2262 {
2263 PUTBACK;
2264 coro_push_av (aTHX_ coro->status, G_ARRAY);
2265 SPAGAIN;
2266 }
2267
2268 PUTBACK;
2269 call_sv (cb, G_VOID | G_DISCARD);
2270 }
2271 }
2272}
2273
2274static void
2275coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2276{
2277 AV *av;
2278
2279 if (coro->status)
2280 {
2281 av = coro->status;
2282 av_clear (av);
2283 }
2284 else
2285 av = coro->status = newAV ();
2286
2287 /* items are actually not so common, so optimise for this case */
2288 if (items)
2289 {
2290 int i;
2291
2292 av_extend (av, items - 1);
2293
2294 for (i = 0; i < items; ++i)
2295 av_push (av, SvREFCNT_inc_NN (arg [i]));
2296 }
2297}
2298
2299static void
2300slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2301{
2302 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2303 api_ready (aTHX_ sv_manager);
2304
2305 frame->prepare = prepare_schedule;
2306 frame->check = slf_check_repeat;
2307
2308 /* as a minor optimisation, we could unwind all stacks here */
2309 /* but that puts extra pressure on pp_slf, and is not worth much */
2310 /*coro_unwind_stacks (aTHX);*/
2311}
2312
2313static void
2314slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2315{
2316 HV *coro_hv = (HV *)SvRV (coro_current);
2317
2318 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2319 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2320}
2321
2322static void
2323slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2324{
2325 HV *coro_hv;
2326 struct coro *coro;
2327
2328 if (items <= 0)
2329 croak ("Coro::cancel called without coro object,");
2330
2331 coro = SvSTATE (arg [0]);
2332 coro_hv = coro->hv;
2333
2334 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2335
2336 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2337 {
2338 /* coro currently busy cancelling something, so just notify it */
2339 coro->slf_frame.data = (void *)coro;
2340
2341 frame->prepare = prepare_nop;
2342 frame->check = slf_check_nop;
2343 }
2344 else if (coro_hv == (HV *)SvRV (coro_current))
2345 {
2346 /* cancelling the current coro is allowed, and equals terminate */
2347 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2348 }
2349 else
2350 {
2351 struct coro *self = SvSTATE_current;
2352
2353 if (!self)
2354 croak ("Coro::cancel called outside of thread content,");
2355
2356 /* otherwise we cancel directly, purely for speed reasons
2357 * unfortunately, this requires some magic trickery, as
2358 * somebody else could cancel us, so we have to fight the cancellation.
2359 * this is ugly, and hopefully fully worth the extra speed.
2360 * besides, I can't get the slow-but-safe version working...
2361 */
2362 slf_frame.data = 0;
2363 self->flags |= CF_NOCANCEL;
2364 coro_state_destroy (aTHX_ coro);
2365 self->flags &= ~CF_NOCANCEL;
2366
2367 if (slf_frame.data)
2368 {
2369 /* while we were busy we have been cancelled, so terminate */
2370 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2371 }
2372 else
2373 {
2374 frame->prepare = prepare_nop;
2375 frame->check = slf_check_nop;
2376 }
2377 }
2378}
2379
2380static int
2381slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2382{
2383 frame->prepare = 0;
2384 coro_unwind_stacks (aTHX);
2385
2386 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2387
2388 return 1;
2389}
2390
2391static int
2392safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2393{
2394 if (coro->cctx)
2395 croak ("coro inside C callback, unable to cancel at this time, caught");
2396
2397 if (coro->flags & (CF_NEW | CF_ZOMBIE))
2398 {
2399 coro_set_status (aTHX_ coro, arg, items);
2400 coro_state_destroy (aTHX_ coro);
2401 }
2402 else
2403 {
2404 if (!coro->slf_frame.prepare)
2405 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2406
2407 slf_destroy (aTHX_ coro);
2408
2409 coro_set_status (aTHX_ coro, arg, items);
2410 coro->slf_frame.prepare = prepare_nop;
2411 coro->slf_frame.check = slf_check_safe_cancel;
2412
2413 api_ready (aTHX_ (SV *)coro->hv);
2414 }
2415
2416 return 1;
2417}
2418
2419/*****************************************************************************/
2420/* async pool handler */
2421
2422static int
2423slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2424{
2425 HV *hv = (HV *)SvRV (coro_current);
2426 struct coro *coro = (struct coro *)frame->data;
2427
2428 if (!coro->invoke_cb)
2429 return 1; /* loop till we have invoke */
2430 else
2431 {
2432 hv_store (hv, "desc", sizeof ("desc") - 1,
2433 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2434
2435 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2436
2437 {
2438 dSP;
2439 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2440 PUTBACK;
2441 }
2442
2443 SvREFCNT_dec (GvAV (PL_defgv));
2444 GvAV (PL_defgv) = coro->invoke_av;
2445 coro->invoke_av = 0;
2446
2447 return 0;
2448 }
2449}
2450
2451static void
2452slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2453{
2454 HV *hv = (HV *)SvRV (coro_current);
2455 struct coro *coro = SvSTATE_hv ((SV *)hv);
2456
2457 if (ecb_expect_true (coro->saved_deffh))
2458 {
2459 /* subsequent iteration */
2460 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2461 coro->saved_deffh = 0;
2462
2463 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2464 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2465 {
2466 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2467 return;
2468 }
2469 else
2470 {
2471 av_clear (GvAV (PL_defgv));
2472 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2473
2474 if (ecb_expect_false (coro->swap_sv))
2475 {
2476 SWAP_SVS_LEAVE (coro);
2477 SvREFCNT_dec_NN (coro->swap_sv);
2478 coro->swap_sv = 0;
2479 }
2480
2481 coro->prio = 0;
2482
2483 if (ecb_expect_false (coro->cctx) && ecb_expect_false (coro->cctx->flags & CC_TRACE))
2484 api_trace (aTHX_ coro_current, 0);
2485
2486 frame->prepare = prepare_schedule;
2487 av_push (av_async_pool, SvREFCNT_inc_NN (hv));
2488 }
2489 }
2490 else
2491 {
2492 /* first iteration, simply fall through */
2493 frame->prepare = prepare_nop;
2494 }
2495
2496 frame->check = slf_check_pool_handler;
2497 frame->data = (void *)coro;
2498}
2499
2500/*****************************************************************************/
2501/* rouse callback */
2502
2503#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2504
2505static void
2506coro_rouse_callback (pTHX_ CV *cv)
2507{
2508 dXSARGS;
2509 SV *data = (SV *)S_GENSUB_ARG;
2510 SV *coro = SvRV (data);
2511
2512 /* data starts being either undef or a coro, and is replaced by the results when done */
2513 if (SvTYPE (coro) != SVt_PVAV)
2514 {
2515 /* first call, set args */
2516
2517 assert (&ST (0) < &ST (1)); /* ensure the stack is in the order we expect it to be */
2518 SvRV_set (data, (SV *)av_make (items, &ST (0))); /* av_make copies the SVs */
2519
2520 if (coro != &PL_sv_undef)
2521 {
2522 api_ready (aTHX_ coro);
2523 SvREFCNT_dec_NN (coro);
2524 }
2525 }
2526
2527 XSRETURN_EMPTY;
2528}
2529
2530static int
2531slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2532{
2533 SV *data = (SV *)frame->data;
2534
2535 if (CORO_THROW)
2536 return 0;
2537
2538 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2539 return 1;
2540
2541 /* now push all results on the stack */
2542 {
2543 dSP;
2544 AV *av = (AV *)SvRV (data);
2545 int i;
2546
2547 EXTEND (SP, AvFILLp (av) + 1);
2548 for (i = 0; i <= AvFILLp (av); ++i)
2549 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2550
2551 /* we have stolen the elements, make it unreal and free */
2552 AvREAL_off (av);
2553 av_undef (av);
2554
2555 PUTBACK;
2556 }
2557
2558 return 0;
2559}
2560
2561static void
2562slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2563{
2564 SV *cb;
2565
2566 if (items)
2567 cb = arg [0];
2568 else
2569 {
2570 struct coro *coro = SvSTATE_current;
2571
2572 if (!coro->rouse_cb)
2573 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2574
2575 cb = sv_2mortal (coro->rouse_cb);
2576 coro->rouse_cb = 0;
2577 }
2578
2579 if (!SvROK (cb)
2580 || SvTYPE (SvRV (cb)) != SVt_PVCV
2581 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2582 croak ("Coro::rouse_wait called with illegal callback argument,");
2583
2584 {
2585 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2586 SV *data = (SV *)S_GENSUB_ARG;
2587 int data_ready = SvTYPE (SvRV (data)) == SVt_PVAV;
2588
2589 /* if there is no data, we need to store the current coro in the reference so we can be woken up */
2590 if (!data_ready)
2591 if (SvRV (data) != &PL_sv_undef)
2592 croak ("Coro::rouse_wait was called on a calback that is already being waited for - only one thread can wait for a rouse callback, caught");
2593 else
2594 SvRV_set (data, SvREFCNT_inc_NN (SvRV (coro_current)));
2595
2596 frame->data = (void *)data;
2597 frame->prepare = data_ready ? prepare_nop : prepare_schedule;
2598 frame->check = slf_check_rouse_wait;
2599 }
2600}
2601
2602static SV *
2603coro_new_rouse_cb (pTHX)
2604{
2605 HV *hv = (HV *)SvRV (coro_current);
2606 struct coro *coro = SvSTATE_hv (hv);
2607 SV *data = newRV_noinc (&PL_sv_undef);
2608 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2609
2610 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2611 SvREFCNT_dec_NN (data); /* magicext increases the refcount */
2612
2613 SvREFCNT_dec (coro->rouse_cb);
2614 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2615
2616 return cb;
2617}
2618
2619/*****************************************************************************/
2620/* schedule-like-function opcode (SLF) */
2621
2622static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2623static const CV *slf_cv;
2624static SV **slf_argv;
2625static int slf_argc, slf_arga; /* count, allocated */
2626static I32 slf_ax; /* top of stack, for restore */
2627
2628/* this restores the stack in the case we patched the entersub, to */
2629/* recreate the stack frame as perl will on following calls */
2630/* since entersub cleared the stack */
2631static OP *
2632pp_restore (pTHX)
2633{
2634 int i;
2635 SV **SP = PL_stack_base + slf_ax;
2636
2637 PUSHMARK (SP);
2638
2639 EXTEND (SP, slf_argc + 1);
2640
2641 for (i = 0; i < slf_argc; ++i)
2642 PUSHs (sv_2mortal (slf_argv [i]));
2643
2644 PUSHs ((SV *)CvGV (slf_cv));
2645
2646 RETURNOP (slf_restore.op_first);
2647}
2648
2649static void
2650slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2651{
2652 SV **arg = (SV **)slf_frame.data;
2653
2654 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2655}
2656
2657static void
2658slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2659{
2660 if (items != 2)
2661 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2662
2663 frame->prepare = slf_prepare_transfer;
2664 frame->check = slf_check_nop;
2665 frame->data = (void *)arg; /* let's hope it will stay valid */
2666}
2667
2668static void
2669slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2670{
2671 frame->prepare = prepare_schedule;
2672 frame->check = slf_check_nop;
2673}
2674
2675static void
2676slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2677{
2678 struct coro *next = (struct coro *)slf_frame.data;
2679
2680 SvREFCNT_inc_NN (next->hv);
2681 prepare_schedule_to (aTHX_ ta, next);
2682}
2683
2684static void
2685slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2686{
2687 if (!items)
2688 croak ("Coro::schedule_to expects a coroutine argument, caught");
2689
2690 frame->data = (void *)SvSTATE (arg [0]);
2691 frame->prepare = slf_prepare_schedule_to;
2692 frame->check = slf_check_nop;
2693}
2694
2695static void
2696slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2697{
2698 api_ready (aTHX_ SvRV (coro_current));
2699
2700 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2701}
2702
2703static void
2704slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2705{
2706 frame->prepare = prepare_cede;
2707 frame->check = slf_check_nop;
2708}
2709
2710static void
2711slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2712{
2713 frame->prepare = prepare_cede_notself;
2714 frame->check = slf_check_nop;
2715}
2716
2717/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2718static void
2719slf_destroy (pTHX_ struct coro *coro)
2720{
2721 struct CoroSLF frame = coro->slf_frame;
2722
2723 /*
2724 * The on_destroy below most likely is from an SLF call.
2725 * Since by definition the SLF call will not finish when we destroy
2726 * the coro, we will have to force-finish it here, otherwise
2727 * cleanup functions cannot call SLF functions.
2728 */
2729 coro->slf_frame.prepare = 0;
2730
2731 /* this callback is reserved for slf functions needing to do cleanup */
2732 if (frame.destroy && frame.prepare && !PL_dirty)
2733 frame.destroy (aTHX_ &frame);
2734}
2735
2736/*
2737 * these not obviously related functions are all rolled into one
2738 * function to increase chances that they all will call transfer with the same
2739 * stack offset
2740 * SLF stands for "schedule-like-function".
2741 */
2742static OP *
2743pp_slf (pTHX)
2744{
2745 I32 checkmark; /* mark SP to see how many elements check has pushed */
2746
2747 /* set up the slf frame, unless it has already been set-up */
2748 /* the latter happens when a new coro has been started */
2749 /* or when a new cctx was attached to an existing coroutine */
2750 if (ecb_expect_true (!slf_frame.prepare))
2751 {
2752 /* first iteration */
2753 dSP;
2754 SV **arg = PL_stack_base + TOPMARK + 1;
2755 int items = SP - arg; /* args without function object */
2756 SV *gv = *sp;
2757
2758 /* do a quick consistency check on the "function" object, and if it isn't */
2759 /* for us, divert to the real entersub */
2760 if (SvTYPE (gv) != SVt_PVGV
2761 || !GvCV (gv)
2762 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2763 return PL_ppaddr[OP_ENTERSUB](aTHX);
2764
2765 if (!(PL_op->op_flags & OPf_STACKED))
2766 {
2767 /* ampersand-form of call, use @_ instead of stack */
2768 AV *av = GvAV (PL_defgv);
2769 arg = AvARRAY (av);
2770 items = AvFILLp (av) + 1;
2771 }
2772
2773 /* now call the init function, which needs to set up slf_frame */
2774 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2775 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2776
2777 /* pop args */
2778 SP = PL_stack_base + POPMARK;
2779
2780 PUTBACK;
2781 }
2782
2783 /* now that we have a slf_frame, interpret it! */
2784 /* we use a callback system not to make the code needlessly */
2785 /* complicated, but so we can run multiple perl coros from one cctx */
2786
2787 do
2788 {
2789 struct coro_transfer_args ta;
2790
2791 slf_frame.prepare (aTHX_ &ta);
2792 TRANSFER (ta, 0);
2793
2794 checkmark = PL_stack_sp - PL_stack_base;
2795 }
2796 while (slf_frame.check (aTHX_ &slf_frame));
2797
2798 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2799
2800 /* exception handling */
2801 if (ecb_expect_false (CORO_THROW))
2802 {
2803 SV *exception = sv_2mortal (CORO_THROW);
2804
2805 CORO_THROW = 0;
2806 sv_setsv (ERRSV, exception);
2807 croak (0);
2808 }
2809
2810 /* return value handling - mostly like entersub */
2811 /* make sure we put something on the stack in scalar context */
2812 if (GIMME_V == G_SCALAR
2813 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2814 {
2815 dSP;
2816 SV **bot = PL_stack_base + checkmark;
2817
2818 if (sp == bot) /* too few, push undef */
2819 bot [1] = &PL_sv_undef;
2820 else /* too many, take last one */
2821 bot [1] = *sp;
2822
2823 SP = bot + 1;
2824
2825 PUTBACK;
2826 }
2827
2828 return NORMAL;
2829}
2830
2831static void
2832api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2833{
2834 int i;
2835 SV **arg = PL_stack_base + ax;
2836 int items = PL_stack_sp - arg + 1;
2837
2838 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2839
2840 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2841 && PL_op->op_ppaddr != pp_slf)
2842 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2843
2844 CvFLAGS (cv) |= CVf_SLF;
2845 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2846 slf_cv = cv;
2847
2848 /* we patch the op, and then re-run the whole call */
2849 /* we have to put the same argument on the stack for this to work */
2850 /* and this will be done by pp_restore */
2851 slf_restore.op_next = (OP *)&slf_restore;
2852 slf_restore.op_type = OP_CUSTOM;
2853 slf_restore.op_ppaddr = pp_restore;
2854 slf_restore.op_first = PL_op;
2855
2856 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2857
2858 if (PL_op->op_flags & OPf_STACKED)
2859 {
2860 if (items > slf_arga)
2861 {
2862 slf_arga = items;
2863 Safefree (slf_argv);
2864 New (0, slf_argv, slf_arga, SV *);
2865 }
2866
2867 slf_argc = items;
2868
2869 for (i = 0; i < items; ++i)
2870 slf_argv [i] = SvREFCNT_inc (arg [i]);
2871 }
2872 else
2873 slf_argc = 0;
2874
2875 PL_op->op_ppaddr = pp_slf;
2876 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2877
2878 PL_op = (OP *)&slf_restore;
2879}
2880
2881/*****************************************************************************/
2882/* dynamic wind */
2883
2884static void
2885on_enterleave_call (pTHX_ SV *cb)
2886{
2887 dSP;
2888
2889 PUSHSTACK;
2890
2891 PUSHMARK (SP);
2892 PUTBACK;
2893 call_sv (cb, G_VOID | G_DISCARD);
2894 SPAGAIN;
2895
2896 POPSTACK;
2897}
2898
2899static SV *
2900coro_avp_pop_and_free (pTHX_ AV **avp)
2901{
2902 AV *av = *avp;
2903 SV *res = av_pop (av);
2904
2905 if (AvFILLp (av) < 0)
2906 {
2907 *avp = 0;
2908 SvREFCNT_dec (av);
2909 }
2910
2911 return res;
2912}
2913
2914static void
2915coro_pop_on_enter (pTHX_ void *coro)
2916{
2917 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2918 SvREFCNT_dec (cb);
2919}
2920
2921static void
2922coro_pop_on_leave (pTHX_ void *coro)
2923{
2924 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2925 on_enterleave_call (aTHX_ sv_2mortal (cb));
2926}
2927
2928static void
2929enterleave_hook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, void *arg)
2930{
2931 if (!hook)
2932 return;
2933
2934 if (!*avp)
2935 {
2936 *avp = newAV ();
2937 AvREAL_off (*avp);
2938 }
2939
2940 av_push (*avp, (SV *)hook);
2941 av_push (*avp, (SV *)arg);
2942}
2943
2944static void
2945enterleave_unhook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, int execute)
2946{
2947 AV *av = *avp;
2948 int i;
2949
2950 if (!av)
2951 return;
2952
2953 for (i = AvFILLp (av) - 1; i >= 0; i -= 2)
2954 if (AvARRAY (av)[i] == (SV *)hook)
2955 {
2956 if (execute)
2957 hook (aTHX_ (void *)AvARRAY (av)[i + 1]);
2958
2959 memmove (AvARRAY (av) + i, AvARRAY (av) + i + 2, AvFILLp (av) - i - 1);
2960 av_pop (av);
2961 av_pop (av);
2962 break;
2963 }
2964
2965 if (AvFILLp (av) >= 0)
2966 {
2967 *avp = 0;
2968 SvREFCNT_dec_NN (av);
2969 }
2970}
2971
2972static void
2973api_enterleave_hook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2974{
2975 struct coro *coro = SvSTATE (coro_sv);
2976
2977 if (SvSTATE_current == coro)
2978 if (enter)
2979 enter (aTHX_ enter_arg);
2980
2981 enterleave_hook_xs (aTHX_ coro, &coro->on_enter_xs, enter, enter_arg);
2982 enterleave_hook_xs (aTHX_ coro, &coro->on_leave_xs, leave, leave_arg);
2983}
2984
2985static void
2986api_enterleave_unhook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, coro_enterleave_hook leave)
2987{
2988 struct coro *coro = SvSTATE (coro_sv);
2989
2990 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2991 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, SvSTATE_current == coro);
2992}
2993
2994static void
2995savedestructor_unhook_enter (pTHX_ coro_enterleave_hook enter)
2996{
2997 struct coro *coro = SvSTATE_current;
2998
2999 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
3000}
3001
3002static void
3003savedestructor_unhook_leave (pTHX_ coro_enterleave_hook leave)
3004{
3005 struct coro *coro = SvSTATE_current;
3006
3007 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, 1);
3008}
3009
3010static void
3011api_enterleave_scope_hook (pTHX_ coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
3012{
3013 api_enterleave_hook (aTHX_ coro_current, enter, enter_arg, leave, leave_arg);
3014
3015 /* this ought to be much cheaper than malloc + a single destructor call */
3016 if (enter) SAVEDESTRUCTOR_X (savedestructor_unhook_enter, enter);
3017 if (leave) SAVEDESTRUCTOR_X (savedestructor_unhook_leave, leave);
3018}
3019
3020/*****************************************************************************/
3021/* PerlIO::cede */
3022
3023typedef struct
3024{
3025 PerlIOBuf base;
3026 NV next, every;
3027} PerlIOCede;
3028
3029static IV ecb_cold
3030PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3031{
3032 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
3033
3034 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
3035 self->next = nvtime () + self->every;
3036
3037 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
3038}
3039
3040static SV * ecb_cold
3041PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
3042{
3043 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
3044
3045 return newSVnv (self->every);
3046}
3047
3048static IV
3049PerlIOCede_flush (pTHX_ PerlIO *f)
3050{
3051 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
3052 double now = nvtime ();
3053
3054 if (now >= self->next)
3055 {
3056 api_cede (aTHX);
3057 self->next = now + self->every;
3058 }
3059
3060 return PerlIOBuf_flush (aTHX_ f);
3061}
3062
3063static PerlIO_funcs PerlIO_cede =
3064{
3065 sizeof(PerlIO_funcs),
3066 "cede",
3067 sizeof(PerlIOCede),
3068 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
3069 PerlIOCede_pushed,
3070 PerlIOBuf_popped,
3071 PerlIOBuf_open,
3072 PerlIOBase_binmode,
3073 PerlIOCede_getarg,
3074 PerlIOBase_fileno,
3075 PerlIOBuf_dup,
3076 PerlIOBuf_read,
3077 PerlIOBuf_unread,
3078 PerlIOBuf_write,
3079 PerlIOBuf_seek,
3080 PerlIOBuf_tell,
3081 PerlIOBuf_close,
3082 PerlIOCede_flush,
3083 PerlIOBuf_fill,
3084 PerlIOBase_eof,
3085 PerlIOBase_error,
3086 PerlIOBase_clearerr,
3087 PerlIOBase_setlinebuf,
3088 PerlIOBuf_get_base,
3089 PerlIOBuf_bufsiz,
3090 PerlIOBuf_get_ptr,
3091 PerlIOBuf_get_cnt,
3092 PerlIOBuf_set_ptrcnt,
3093};
3094
3095/*****************************************************************************/
3096/* Coro::Semaphore & Coro::Signal */
3097
3098static SV *
3099coro_waitarray_new (pTHX_ int count)
3100{
3101 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
3102 AV *av = newAV ();
3103 SV **ary;
3104
3105 /* unfortunately, building manually saves memory */
3106 Newx (ary, 2, SV *);
3107 AvALLOC (av) = ary;
3108#if PERL_VERSION_ATLEAST (5,10,0)
3109 AvARRAY (av) = ary;
3110#else
3111 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
3112 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
3113 SvPVX ((SV *)av) = (char *)ary;
3114#endif
3115 AvMAX (av) = 1;
3116 AvFILLp (av) = 0;
3117 ary [0] = newSViv (count);
3118
3119 return newRV_noinc ((SV *)av);
3120}
3121
3122/* semaphore */
3123
3124static void
3125coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
3126{
3127 SV *count_sv = AvARRAY (av)[0];
3128 IV count = SvIVX (count_sv);
3129
3130 count += adjust;
3131 SvIVX (count_sv) = count;
3132
3133 /* now wake up as many waiters as are expected to lock */
3134 while (count > 0 && AvFILLp (av) > 0)
3135 {
3136 SV *cb;
3137
3138 /* swap first two elements so we can shift a waiter */
3139 AvARRAY (av)[0] = AvARRAY (av)[1];
3140 AvARRAY (av)[1] = count_sv;
3141 cb = av_shift (av);
3142
3143 if (SvOBJECT (cb))
3144 {
3145 api_ready (aTHX_ cb);
3146 --count;
3147 }
3148 else if (SvTYPE (cb) == SVt_PVCV)
1145 { 3149 {
1146 dSP; 3150 dSP;
1147 UNLOCK;
1148
1149 ENTER;
1150 SAVETMPS;
1151
1152 PUSHMARK (SP); 3151 PUSHMARK (SP);
3152 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1153 PUTBACK; 3153 PUTBACK;
1154 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 3154 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1155
1156 FREETMPS;
1157 LEAVE;
1158 continue;
1159 } 3155 }
1160 3156
1161 ta->next = SvSTATE (next_sv); 3157 SvREFCNT_dec_NN (cb);
3158 }
3159}
1162 3160
1163 /* cannot transfer to destroyed coros, skip and look for next */ 3161static void
1164 if (ta->next->flags & CF_DESTROYED) 3162coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
3163{
3164 /* call $sem->adjust (0) to possibly wake up some other waiters */
3165 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
3166}
3167
3168static int
3169slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
3170{
3171 AV *av = (AV *)frame->data;
3172 SV *count_sv = AvARRAY (av)[0];
3173 SV *coro_hv = SvRV (coro_current);
3174
3175 frame->destroy = 0;
3176
3177 /* if we are about to throw, don't actually acquire the lock, just throw */
3178 if (ecb_expect_false (CORO_THROW))
3179 {
3180 /* we still might be responsible for the semaphore, so wake up others */
3181 coro_semaphore_adjust (aTHX_ av, 0);
3182
3183 return 0;
3184 }
3185 else if (SvIVX (count_sv) > 0)
3186 {
3187 if (acquire)
3188 SvIVX (count_sv) = SvIVX (count_sv) - 1;
3189 else
3190 coro_semaphore_adjust (aTHX_ av, 0);
3191
3192 return 0;
3193 }
3194 else
3195 {
3196 int i;
3197 /* if we were woken up but can't down, we look through the whole */
3198 /* waiters list and only add us if we aren't in there already */
3199 /* this avoids some degenerate memory usage cases */
3200 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
3201 if (AvARRAY (av)[i] == coro_hv)
3202 return 1;
3203
3204 av_push (av, SvREFCNT_inc (coro_hv));
3205 return 1;
3206 }
3207}
3208
3209static int
3210slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
3211{
3212 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
3213}
3214
3215static int
3216slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
3217{
3218 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3219}
3220
3221static void
3222slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3223{
3224 AV *av = (AV *)SvRV (arg [0]);
3225
3226 if (SvIVX (AvARRAY (av)[0]) > 0)
3227 {
3228 frame->data = (void *)av;
3229 frame->prepare = prepare_nop;
3230 }
3231 else
3232 {
3233 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3234
3235 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3236 frame->prepare = prepare_schedule;
3237 /* to avoid race conditions when a woken-up coro gets terminated */
3238 /* we arrange for a temporary on_destroy that calls adjust (0) */
3239 frame->destroy = coro_semaphore_destroy;
3240 }
3241}
3242
3243static void
3244slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3245{
3246 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3247 frame->check = slf_check_semaphore_down;
3248}
3249
3250static void
3251slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3252{
3253 if (items >= 2)
3254 {
3255 /* callback form */
3256 AV *av = (AV *)SvRV (arg [0]);
3257 SV *cb_cv = s_get_cv_croak (arg [1]);
3258
3259 av_push (av, SvREFCNT_inc_NN (cb_cv));
3260
3261 if (SvIVX (AvARRAY (av)[0]) > 0)
3262 coro_semaphore_adjust (aTHX_ av, 0);
3263
3264 frame->prepare = prepare_nop;
3265 frame->check = slf_check_nop;
3266 }
3267 else
3268 {
3269 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3270 frame->check = slf_check_semaphore_wait;
3271 }
3272}
3273
3274/* signal */
3275
3276static void
3277coro_signal_wake (pTHX_ AV *av, int count)
3278{
3279 SvIVX (AvARRAY (av)[0]) = 0;
3280
3281 /* now signal count waiters */
3282 while (count > 0 && AvFILLp (av) > 0)
3283 {
3284 SV *cb;
3285
3286 /* swap first two elements so we can shift a waiter */
3287 cb = AvARRAY (av)[0];
3288 AvARRAY (av)[0] = AvARRAY (av)[1];
3289 AvARRAY (av)[1] = cb;
3290
3291 cb = av_shift (av);
3292
3293 if (SvTYPE (cb) == SVt_PVCV)
1165 { 3294 {
3295 dSP;
3296 PUSHMARK (SP);
3297 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1166 UNLOCK; 3298 PUTBACK;
1167 SvREFCNT_dec (next_sv); 3299 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1168 /* coro_nready is already taken care of by destroy */
1169 continue;
1170 } 3300 }
3301 else
3302 {
3303 api_ready (aTHX_ cb);
3304 sv_setiv (cb, 0); /* signal waiter */
3305 }
1171 3306
1172 --coro_nready; 3307 SvREFCNT_dec_NN (cb);
1173 UNLOCK;
1174 break;
1175 }
1176 3308
1177 /* free this only after the transfer */ 3309 --count;
1178 prev_sv = SvRV (coro_current); 3310 }
1179 SvRV_set (coro_current, next_sv);
1180 ta->prev = SvSTATE (prev_sv);
1181
1182 assert (ta->next->flags & CF_READY);
1183 ta->next->flags &= ~CF_READY;
1184
1185 LOCK;
1186 free_coro_mortal (aTHX);
1187 coro_mortal = prev_sv;
1188 UNLOCK;
1189}
1190
1191static void
1192prepare_cede (pTHX_ struct transfer_args *ta)
1193{
1194 api_ready (coro_current);
1195 prepare_schedule (aTHX_ ta);
1196} 3311}
1197 3312
1198static int 3313static int
1199prepare_cede_notself (pTHX_ struct transfer_args *ta) 3314slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
1200{ 3315{
1201 if (coro_nready) 3316 /* if we are about to throw, also stop waiting */
3317 return SvROK ((SV *)frame->data) && !CORO_THROW;
3318}
3319
3320static void
3321slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3322{
3323 AV *av = (AV *)SvRV (arg [0]);
3324
3325 if (items >= 2)
3326 {
3327 SV *cb_cv = s_get_cv_croak (arg [1]);
3328 av_push (av, SvREFCNT_inc_NN (cb_cv));
3329
3330 if (SvIVX (AvARRAY (av)[0]))
3331 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3332
3333 frame->prepare = prepare_nop;
3334 frame->check = slf_check_nop;
1202 { 3335 }
1203 SV *prev = SvRV (coro_current); 3336 else if (SvIVX (AvARRAY (av)[0]))
1204 prepare_schedule (aTHX_ ta); 3337 {
1205 api_ready (prev); 3338 SvIVX (AvARRAY (av)[0]) = 0;
1206 return 1; 3339 frame->prepare = prepare_nop;
3340 frame->check = slf_check_nop;
1207 } 3341 }
1208 else 3342 else
3343 {
3344 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3345
3346 av_push (av, waiter);
3347
3348 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3349 frame->prepare = prepare_schedule;
3350 frame->check = slf_check_signal_wait;
3351 }
3352}
3353
3354/*****************************************************************************/
3355/* Coro::AIO */
3356
3357#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3358
3359/* helper storage struct */
3360struct io_state
3361{
3362 int errorno;
3363 I32 laststype; /* U16 in 5.10.0 */
3364 int laststatval;
3365 Stat_t statcache;
3366};
3367
3368static void
3369coro_aio_callback (pTHX_ CV *cv)
3370{
3371 dXSARGS;
3372 AV *state = (AV *)S_GENSUB_ARG;
3373 SV *coro = av_pop (state);
3374 SV *data_sv = newSV (sizeof (struct io_state));
3375
3376 av_extend (state, items - 1);
3377
3378 sv_upgrade (data_sv, SVt_PV);
3379 SvCUR_set (data_sv, sizeof (struct io_state));
3380 SvPOK_only (data_sv);
3381
3382 {
3383 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3384
3385 data->errorno = errno;
3386 data->laststype = PL_laststype;
3387 data->laststatval = PL_laststatval;
3388 data->statcache = PL_statcache;
3389 }
3390
3391 /* now build the result vector out of all the parameters and the data_sv */
3392 {
3393 int i;
3394
3395 for (i = 0; i < items; ++i)
3396 av_push (state, SvREFCNT_inc_NN (ST (i)));
3397 }
3398
3399 av_push (state, data_sv);
3400
3401 api_ready (aTHX_ coro);
3402 SvREFCNT_dec_NN (coro);
3403 SvREFCNT_dec_NN ((AV *)state);
3404}
3405
3406static int
3407slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3408{
3409 AV *state = (AV *)frame->data;
3410
3411 /* if we are about to throw, return early */
3412 /* this does not cancel the aio request, but at least */
3413 /* it quickly returns */
3414 if (CORO_THROW)
1209 return 0; 3415 return 0;
1210}
1211 3416
1212static void 3417 /* one element that is an RV? repeat! */
1213api_schedule (void) 3418 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
1214{
1215 dTHX;
1216 struct transfer_args ta;
1217
1218 prepare_schedule (aTHX_ &ta);
1219 TRANSFER (ta);
1220}
1221
1222static int
1223api_cede (void)
1224{
1225 dTHX;
1226 struct transfer_args ta;
1227
1228 prepare_cede (aTHX_ &ta);
1229
1230 if (ta.prev != ta.next)
1231 {
1232 TRANSFER (ta);
1233 return 1; 3419 return 1;
3420
3421 /* restore status */
3422 {
3423 SV *data_sv = av_pop (state);
3424 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3425
3426 errno = data->errorno;
3427 PL_laststype = data->laststype;
3428 PL_laststatval = data->laststatval;
3429 PL_statcache = data->statcache;
3430
3431 SvREFCNT_dec_NN (data_sv);
1234 } 3432 }
1235 else 3433
3434 /* push result values */
3435 {
3436 dSP;
3437 int i;
3438
3439 EXTEND (SP, AvFILLp (state) + 1);
3440 for (i = 0; i <= AvFILLp (state); ++i)
3441 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3442
3443 PUTBACK;
3444 }
3445
1236 return 0; 3446 return 0;
1237} 3447}
1238 3448
1239static int 3449static void
1240api_cede_notself (void) 3450slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1241{ 3451{
1242 dTHX; 3452 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
1243 struct transfer_args ta; 3453 SV *coro_hv = SvRV (coro_current);
3454 struct coro *coro = SvSTATE_hv (coro_hv);
1244 3455
1245 if (prepare_cede_notself (aTHX_ &ta)) 3456 /* put our coroutine id on the state arg */
1246 { 3457 av_push (state, SvREFCNT_inc_NN (coro_hv));
1247 TRANSFER (ta); 3458
1248 return 1; 3459 /* first see whether we have a non-zero priority and set it as AIO prio */
3460 if (coro->prio)
1249 } 3461 {
1250 else 3462 dSP;
1251 return 0;
1252}
1253 3463
3464 static SV *prio_cv;
3465 static SV *prio_sv;
3466
3467 if (ecb_expect_false (!prio_cv))
3468 {
3469 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3470 prio_sv = newSViv (0);
3471 }
3472
3473 PUSHMARK (SP);
3474 sv_setiv (prio_sv, coro->prio);
3475 XPUSHs (prio_sv);
3476
3477 PUTBACK;
3478 call_sv (prio_cv, G_VOID | G_DISCARD);
3479 }
3480
3481 /* now call the original request */
3482 {
3483 dSP;
3484 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3485 int i;
3486
3487 PUSHMARK (SP);
3488
3489 /* first push all args to the stack */
3490 EXTEND (SP, items + 1);
3491
3492 for (i = 0; i < items; ++i)
3493 PUSHs (arg [i]);
3494
3495 /* now push the callback closure */
3496 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3497
3498 /* now call the AIO function - we assume our request is uncancelable */
3499 PUTBACK;
3500 call_sv ((SV *)req, G_VOID | G_DISCARD);
3501 }
3502
3503 /* now that the request is going, we loop till we have a result */
3504 frame->data = (void *)state;
3505 frame->prepare = prepare_schedule;
3506 frame->check = slf_check_aio_req;
3507}
3508
3509static void
3510coro_aio_req_xs (pTHX_ CV *cv)
3511{
3512 dXSARGS;
3513
3514 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3515
3516 XSRETURN_EMPTY;
3517}
3518
3519/*****************************************************************************/
3520
3521#if CORO_CLONE
3522# include "clone.c"
3523#endif
3524
3525/*****************************************************************************/
3526
3527static SV *
3528coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3529{
3530 SV *coro_sv;
3531 struct coro *coro;
3532 MAGIC *mg;
3533 HV *hv;
3534 SV *cb;
3535 int i;
3536
3537 if (argc > 0)
3538 {
3539 cb = s_get_cv_croak (argv [0]);
3540
3541 if (!is_coro)
3542 {
3543 if (CvISXSUB (cb))
3544 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3545
3546 if (!CvROOT (cb))
3547 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3548 }
3549 }
3550
3551 Newz (0, coro, 1, struct coro);
3552 coro->args = newAV ();
3553 coro->flags = CF_NEW;
3554
3555 if (coro_first) coro_first->prev = coro;
3556 coro->next = coro_first;
3557 coro_first = coro;
3558
3559 coro->hv = hv = newHV ();
3560 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3561 mg->mg_flags |= MGf_DUP;
3562 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3563
3564 if (argc > 0)
3565 {
3566 av_extend (coro->args, argc + is_coro - 1);
3567
3568 if (is_coro)
3569 {
3570 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3571 cb = (SV *)cv_coro_run;
3572 }
3573
3574 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3575
3576 for (i = 1; i < argc; i++)
3577 av_push (coro->args, newSVsv (argv [i]));
3578 }
3579
3580 return coro_sv;
3581}
3582
3583#ifndef __cplusplus
3584ecb_cold XS(boot_Coro__State);
3585#endif
3586
3587#if CORO_JIT
3588
3589static void ecb_noinline ecb_cold
3590pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3591{
3592 dSP;
3593 AV *av = newAV ();
3594
3595 av_store (av, 3, newSVuv (d));
3596 av_store (av, 2, newSVuv (c));
3597 av_store (av, 1, newSVuv (b));
3598 av_store (av, 0, newSVuv (a));
3599
3600 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3601
3602 PUTBACK;
3603}
3604
3605static void ecb_noinline ecb_cold
3606jit_init (pTHX)
3607{
3608 dSP;
3609 SV *load, *save;
3610 char *map_base;
3611 char *load_ptr, *save_ptr;
3612 STRLEN load_len, save_len, map_len;
3613 int count;
3614
3615 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3616
3617 PUSHMARK (SP);
3618 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3619 #include "state.h"
3620 count = call_pv ("Coro::State::_jit", G_ARRAY);
3621 SPAGAIN;
3622
3623 save = POPs; save_ptr = SvPVbyte (save, save_len);
3624 load = POPs; load_ptr = SvPVbyte (load, load_len);
3625
3626 map_len = load_len + save_len + 16;
3627
3628 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3629
3630 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3631
3632 load_perl_slots = (load_save_perl_slots_type)map_base;
3633 memcpy (load_perl_slots, load_ptr, load_len);
3634
3635 save_perl_slots = (load_save_perl_slots_type)(map_base + ((load_len + 15) & ~15));
3636 memcpy (save_perl_slots, save_ptr, save_len);
3637
3638 /* we are good citizens and try to make the page read-only, so the evil evil */
3639 /* hackers might have it a bit more difficult */
3640 /* we do this in two steps, to potentially appease some security frameworks */
3641 mprotect (map_base, map_len, PROT_READ);
3642 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3643
3644 PUTBACK;
3645 eval_pv ("undef &Coro::State::_jit", 1);
3646}
3647
3648#endif
3649
1254MODULE = Coro::State PACKAGE = Coro::State 3650MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1255 3651
1256PROTOTYPES: DISABLE 3652PROTOTYPES: DISABLE
1257 3653
1258BOOT: 3654BOOT:
1259{ 3655{
3656#define VARx(name,expr,type) if (sizeof (type) < sizeof (expr)) croak ("FATAL: Coro thread context slot '" # name "' too small for this version of perl.");
3657#include "state.h"
1260#ifdef USE_ITHREADS 3658#ifdef USE_ITHREADS
1261 MUTEX_INIT (&coro_mutex); 3659# if CORO_PTHREAD
3660 coro_thx = PERL_GET_CONTEXT;
1262#endif 3661# endif
1263 BOOT_PAGESIZE; 3662#endif
3663 /* perl defines these to check for existance first, but why it doesn't */
3664 /* just create them one at init time is not clear to me, except for */
3665 /* programs trying to delete them, but... */
3666 /* anyway, we declare this as invalid and make sure they are initialised here */
3667 DEFSV;
3668 ERRSV;
3669
3670 cctx_current = cctx_new_empty ();
3671
3672 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3673 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3674
3675 {
3676 /*
3677 * we provide a vtbvl for %SIG magic that replaces PL_vtbl_sig
3678 * by coro_sig_vtbl in hash values.
3679 */
3680 MAGIC *mg = mg_find ((SV *)GvHV (gv_fetchpv ("SIG", GV_ADD | GV_NOTQUAL, SVt_PVHV)), PERL_MAGIC_sig);
3681
3682 /* this only works if perl doesn't have a vtbl for %SIG */
3683 assert (!mg->mg_virtual);
3684
3685 /*
3686 * The irony is that the perl API itself asserts that mg_virtual
3687 * must be non-const, yet perl5porters insisted on marking their
3688 * vtbls as read-only, just to thwart perl modules from patching
3689 * them.
3690 */
3691 mg->mg_virtual = (MGVTBL *)&coro_sig_vtbl;
3692 mg->mg_flags |= MGf_COPY;
3693
3694 coro_sigelem_vtbl = PL_vtbl_sigelem;
3695 coro_sigelem_vtbl.svt_get = coro_sigelem_get;
3696 coro_sigelem_vtbl.svt_set = coro_sigelem_set;
3697 coro_sigelem_vtbl.svt_clear = coro_sigelem_clr;
3698 }
3699
3700 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3701 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1264 3702
1265 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3703 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1266 3704
3705 newCONSTSUB (coro_state_stash, "BACKEND", newSVpv (CORO_BACKEND, 0)); /* undocumented */
3706
1267 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 3707 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1268 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV)); 3708 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1269 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1270 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1271 newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
1272 newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF)); 3709 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1273 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 3710 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1274 3711
1275 main_mainstack = PL_mainstack; 3712 main_mainstack = PL_mainstack;
1276 main_top_env = PL_top_env; 3713 main_top_env = PL_top_env;
1277 3714
1278 while (main_top_env->je_prev) 3715 while (main_top_env->je_prev)
1279 main_top_env = main_top_env->je_prev; 3716 main_top_env = main_top_env->je_prev;
1280 3717
3718 {
3719 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3720
3721 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3722 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3723
3724 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3725 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3726 }
3727
1281 coroapi.ver = CORO_API_VERSION; 3728 coroapi.ver = CORO_API_VERSION;
3729 coroapi.rev = CORO_API_REVISION;
3730
1282 coroapi.transfer = api_transfer; 3731 coroapi.transfer = api_transfer;
1283 3732
3733 coroapi.sv_state = SvSTATE_;
3734 coroapi.execute_slf = api_execute_slf;
3735 coroapi.prepare_nop = prepare_nop;
3736 coroapi.prepare_schedule = prepare_schedule;
3737 coroapi.prepare_cede = prepare_cede;
3738 coroapi.prepare_cede_notself = prepare_cede_notself;
3739
3740 time_init (aTHX);
3741
1284 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3742 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3743#if CORO_JIT
3744 PUTBACK;
3745 jit_init (aTHX);
3746 SPAGAIN;
3747#endif
1285} 3748}
1286 3749
1287SV * 3750SV *
1288new (char *klass, ...) 3751new (SV *klass, ...)
3752 ALIAS:
3753 Coro::new = 1
1289 CODE: 3754 CODE:
1290{ 3755 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1291 struct coro *coro;
1292 HV *hv;
1293 int i;
1294
1295 Newz (0, coro, 1, struct coro);
1296 coro->args = newAV ();
1297 coro->save = CORO_SAVE_DEF;
1298 coro->flags = CF_NEW;
1299
1300 if (coro_first) coro_first->prev = coro;
1301 coro->next = coro_first;
1302 coro_first = coro;
1303
1304 coro->hv = hv = newHV ();
1305 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1306 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1307
1308 for (i = 1; i < items; i++)
1309 av_push (coro->args, newSVsv (ST (i)));
1310}
1311 OUTPUT:
1312 RETVAL
1313
1314int
1315save (SV *coro, int new_save = -1)
1316 CODE:
1317 RETVAL = api_save (coro, new_save);
1318 OUTPUT: 3756 OUTPUT:
1319 RETVAL 3757 RETVAL
1320 3758
1321int 3759void
1322save_also (SV *coro_sv, int save_also) 3760transfer (...)
3761 PROTOTYPE: $$
1323 CODE: 3762 CODE:
3763 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3764
3765SV *
3766clone (Coro::State coro)
3767 CODE:
1324{ 3768{
1325 struct coro *coro = SvSTATE (coro_sv); 3769#if CORO_CLONE
1326 RETVAL = coro->save; 3770 struct coro *ncoro = coro_clone (aTHX_ coro);
1327 coro->save |= save_also; 3771 MAGIC *mg;
3772 /* TODO: too much duplication */
3773 ncoro->hv = newHV ();
3774 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3775 mg->mg_flags |= MGf_DUP;
3776 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3777#else
3778 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3779#endif
1328} 3780}
1329 OUTPUT: 3781 OUTPUT:
1330 RETVAL 3782 RETVAL
1331 3783
1332void 3784int
1333_set_stacklevel (...) 3785cctx_stacksize (int new_stacksize = 0)
1334 ALIAS: 3786 PROTOTYPE: ;$
1335 Coro::State::transfer = 1 3787 CODE:
1336 Coro::schedule = 2 3788 RETVAL = cctx_stacksize;
1337 Coro::cede = 3 3789 if (new_stacksize)
1338 Coro::cede_notself = 4
1339 CODE:
1340{
1341 struct transfer_args ta;
1342
1343 switch (ix)
1344 { 3790 {
1345 case 0: 3791 cctx_stacksize = new_stacksize;
1346 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 3792 ++cctx_gen;
1347 ta.next = 0;
1348 break;
1349
1350 case 1:
1351 if (items != 2)
1352 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1353
1354 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1355 break;
1356
1357 case 2:
1358 prepare_schedule (aTHX_ &ta);
1359 break;
1360
1361 case 3:
1362 prepare_cede (aTHX_ &ta);
1363 break;
1364
1365 case 4:
1366 if (!prepare_cede_notself (aTHX_ &ta))
1367 XSRETURN_EMPTY;
1368
1369 break;
1370 } 3793 }
1371
1372 BARRIER;
1373 TRANSFER (ta);
1374
1375 if (GIMME_V != G_VOID && ta.next != ta.prev)
1376 XSRETURN_YES;
1377}
1378
1379bool
1380_destroy (SV *coro_sv)
1381 CODE:
1382 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1383 OUTPUT: 3794 OUTPUT:
1384 RETVAL 3795 RETVAL
1385 3796
1386void 3797int
1387_exit (code) 3798cctx_max_idle (int max_idle = 0)
1388 int code 3799 PROTOTYPE: ;$
1389 PROTOTYPE: $
1390 CODE: 3800 CODE:
1391 _exit (code); 3801 RETVAL = cctx_max_idle;
1392 3802 if (max_idle > 1)
1393int 3803 cctx_max_idle = max_idle;
1394cctx_stacksize (int new_stacksize = 0)
1395 CODE:
1396 RETVAL = coro_stacksize;
1397 if (new_stacksize)
1398 coro_stacksize = new_stacksize;
1399 OUTPUT: 3804 OUTPUT:
1400 RETVAL 3805 RETVAL
1401 3806
1402int 3807int
1403cctx_count () 3808cctx_count ()
3809 PROTOTYPE:
1404 CODE: 3810 CODE:
1405 RETVAL = cctx_count; 3811 RETVAL = cctx_count;
1406 OUTPUT: 3812 OUTPUT:
1407 RETVAL 3813 RETVAL
1408 3814
1409int 3815int
1410cctx_idle () 3816cctx_idle ()
3817 PROTOTYPE:
1411 CODE: 3818 CODE:
1412 RETVAL = cctx_idle; 3819 RETVAL = cctx_idle;
1413 OUTPUT: 3820 OUTPUT:
1414 RETVAL 3821 RETVAL
1415 3822
1416void 3823void
1417list () 3824list ()
3825 PROTOTYPE:
1418 PPCODE: 3826 PPCODE:
1419{ 3827{
1420 struct coro *coro; 3828 struct coro *coro;
1421 for (coro = coro_first; coro; coro = coro->next) 3829 for (coro = coro_first; coro; coro = coro->next)
1422 if (coro->hv) 3830 if (coro->hv)
1423 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv))); 3831 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1424} 3832}
1425 3833
… …
1427call (Coro::State coro, SV *coderef) 3835call (Coro::State coro, SV *coderef)
1428 ALIAS: 3836 ALIAS:
1429 eval = 1 3837 eval = 1
1430 CODE: 3838 CODE:
1431{ 3839{
1432 if (coro->mainstack) 3840 struct coro *current = SvSTATE_current;
3841
3842 if ((coro == current) || (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot)))
1433 { 3843 {
1434 struct coro temp; 3844 struct CoroSLF slf_save;
1435 Zero (&temp, 1, struct coro);
1436 temp.save = CORO_SAVE_ALL;
1437 3845
1438 if (!(coro->flags & CF_RUNNING)) 3846 if (current != coro)
1439 { 3847 {
3848 PUTBACK;
1440 save_perl (aTHX_ &temp); 3849 save_perl (aTHX_ current);
1441 load_perl (aTHX_ coro); 3850 load_perl (aTHX_ coro);
3851 /* the coro is most likely in an active SLF call.
3852 * while not strictly required (the code we execute is
3853 * not allowed to call any SLF functions), it's cleaner
3854 * to reinitialise the slf_frame and restore it later.
3855 * This might one day allow us to actually do SLF calls
3856 * from code executed here.
3857 */
3858 slf_save = slf_frame;
3859 slf_frame.prepare = 0;
3860 SPAGAIN;
1442 } 3861 }
1443 3862
1444 { 3863 PUSHSTACK;
1445 dSP; 3864
1446 ENTER;
1447 SAVETMPS;
1448 PUSHMARK (SP); 3865 PUSHMARK (SP);
1449 PUTBACK; 3866 PUTBACK;
3867
1450 if (ix) 3868 if (ix)
1451 eval_sv (coderef, 0); 3869 eval_sv (coderef, 0);
1452 else 3870 else
1453 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3871 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3872
3873 POPSTACK;
1454 SPAGAIN; 3874 SPAGAIN;
1455 FREETMPS;
1456 LEAVE;
1457 PUTBACK;
1458 }
1459 3875
1460 if (!(coro->flags & CF_RUNNING)) 3876 if (current != coro)
1461 { 3877 {
3878 PUTBACK;
3879 slf_frame = slf_save;
1462 save_perl (aTHX_ coro); 3880 save_perl (aTHX_ coro);
1463 load_perl (aTHX_ &temp); 3881 load_perl (aTHX_ current);
3882 SPAGAIN;
1464 } 3883 }
1465 } 3884 }
1466} 3885}
1467 3886
1468SV * 3887SV *
1469is_ready (Coro::State coro) 3888is_ready (Coro::State coro)
1470 PROTOTYPE: $ 3889 PROTOTYPE: $
1471 ALIAS: 3890 ALIAS:
1472 is_ready = CF_READY 3891 is_ready = CF_READY
1473 is_running = CF_RUNNING 3892 is_running = CF_RUNNING
1474 is_new = CF_NEW 3893 is_new = CF_NEW
1475 is_destroyed = CF_DESTROYED 3894 is_destroyed = CF_ZOMBIE
3895 is_zombie = CF_ZOMBIE
3896 is_suspended = CF_SUSPENDED
1476 CODE: 3897 CODE:
1477 RETVAL = boolSV (coro->flags & ix); 3898 RETVAL = boolSV (coro->flags & ix);
1478 OUTPUT: 3899 OUTPUT:
1479 RETVAL 3900 RETVAL
1480 3901
1481void 3902void
1482trace (Coro::State coro, int enable = 0) 3903throw (SV *self, SV *exception = &PL_sv_undef)
1483 CODE: 3904 PROTOTYPE: $;$
1484 if (enable) 3905 CODE:
1485 { 3906{
1486 if (coro->flags & CF_RUNNING) 3907 struct coro *coro = SvSTATE (self);
1487 croak ("cannot enable tracing on running coroutine"); 3908 struct coro *current = SvSTATE_current;
3909 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3910 SvREFCNT_dec (*exceptionp);
3911 SvGETMAGIC (exception);
3912 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
1488 3913
1489 if (coro->cctx) 3914 api_ready (aTHX_ self);
1490 croak ("cannot enable tracing on coroutine with custom stack"); 3915}
1491 3916
1492 coro->cctx = cctx_new (); 3917void
1493 coro->cctx->flags |= CC_TRACE; 3918api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1494 } 3919 PROTOTYPE: $;$
1495 else 3920 C_ARGS: aTHX_ coro, flags
1496 if (coro->cctx && coro->cctx->flags & CC_TRACE)
1497 {
1498 coro->cctx->flags &= ~CC_TRACE;
1499 coro->cctx->flags |= CC_NOREUSE;
1500 }
1501 3921
1502SV * 3922SV *
1503has_stack (Coro::State coro) 3923has_cctx (Coro::State coro)
1504 PROTOTYPE: $ 3924 PROTOTYPE: $
1505 CODE: 3925 CODE:
1506 RETVAL = boolSV (!!coro->cctx); 3926 /* maybe manage the running flag differently */
3927 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1507 OUTPUT: 3928 OUTPUT:
1508 RETVAL 3929 RETVAL
1509 3930
1510IV 3931int
3932is_traced (Coro::State coro)
3933 PROTOTYPE: $
3934 CODE:
3935 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3936 OUTPUT:
3937 RETVAL
3938
3939UV
1511rss (Coro::State coro) 3940rss (Coro::State coro)
1512 PROTOTYPE: $ 3941 PROTOTYPE: $
3942 ALIAS:
3943 usecount = 1
1513 CODE: 3944 CODE:
1514 RETVAL = coro_rss (coro); 3945 switch (ix)
3946 {
3947 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3948 case 1: RETVAL = coro->usecount; break;
3949 }
1515 OUTPUT: 3950 OUTPUT:
1516 RETVAL 3951 RETVAL
1517 3952
3953void
3954force_cctx ()
3955 PROTOTYPE:
3956 CODE:
3957 cctx_current->idle_sp = 0;
3958
3959void
3960swap_defsv (Coro::State self)
3961 PROTOTYPE: $
3962 ALIAS:
3963 swap_defav = 1
3964 CODE:
3965 if (!self->slot)
3966 croak ("cannot swap state with coroutine that has no saved state,");
3967 else
3968 {
3969 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3970 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3971
3972 SV *tmp = *src; *src = *dst; *dst = tmp;
3973 }
3974
3975void
3976cancel (Coro::State self)
3977 CODE:
3978 coro_state_destroy (aTHX_ self);
3979
3980SV *
3981enable_times (int enabled = enable_times)
3982 CODE:
3983{
3984 RETVAL = boolSV (enable_times);
3985
3986 if (enabled != enable_times)
3987 {
3988 enable_times = enabled;
3989
3990 coro_times_update ();
3991 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3992 }
3993}
3994 OUTPUT:
3995 RETVAL
3996
3997void
3998times (Coro::State self)
3999 PPCODE:
4000{
4001 struct coro *current = SvSTATE (coro_current);
4002
4003 if (ecb_expect_false (current == self))
4004 {
4005 coro_times_update ();
4006 coro_times_add (SvSTATE (coro_current));
4007 }
4008
4009 EXTEND (SP, 2);
4010 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
4011 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
4012
4013 if (ecb_expect_false (current == self))
4014 coro_times_sub (SvSTATE (coro_current));
4015}
4016
4017void
4018swap_sv (Coro::State coro, SV *sva, SV *svb)
4019 CODE:
4020{
4021 struct coro *current = SvSTATE_current;
4022 AV *swap_sv;
4023 int i;
4024
4025 sva = SvRV (sva);
4026 svb = SvRV (svb);
4027
4028 if (current == coro)
4029 SWAP_SVS_LEAVE (current);
4030
4031 if (!coro->swap_sv)
4032 coro->swap_sv = newAV ();
4033
4034 swap_sv = coro->swap_sv;
4035
4036 for (i = AvFILLp (swap_sv) - 1; i >= 0; i -= 2)
4037 {
4038 SV *a = AvARRAY (swap_sv)[i ];
4039 SV *b = AvARRAY (swap_sv)[i + 1];
4040
4041 if (a == sva && b == svb)
4042 {
4043 SvREFCNT_dec_NN (a);
4044 SvREFCNT_dec_NN (b);
4045
4046 for (; i <= AvFILLp (swap_sv) - 2; i++)
4047 AvARRAY (swap_sv)[i] = AvARRAY (swap_sv)[i + 2];
4048
4049 AvFILLp (swap_sv) -= 2;
4050
4051 goto removed;
4052 }
4053 }
4054
4055 av_push (swap_sv, SvREFCNT_inc_NN (sva));
4056 av_push (swap_sv, SvREFCNT_inc_NN (svb));
4057
4058 removed:
4059
4060 if (current == coro)
4061 SWAP_SVS_ENTER (current);
4062}
4063
1518 4064
1519MODULE = Coro::State PACKAGE = Coro 4065MODULE = Coro::State PACKAGE = Coro
1520 4066
1521BOOT: 4067BOOT:
1522{ 4068{
1523 int i; 4069 if (SVt_LAST > 32)
4070 croak ("Coro internal error: SVt_LAST > 32, swap_sv might need adjustment");
1524 4071
1525 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE); 4072 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1526 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE); 4073 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
4074 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
4075 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1527 av_async_pool = get_av ("Coro::async_pool", TRUE); 4076 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
4077 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
4078 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
4079 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1528 4080
1529 coro_current = get_sv ("Coro::current", FALSE); 4081 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1530 SvREADONLY_on (coro_current); 4082 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
4083 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
4084 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
1531 4085
1532 coro_stash = gv_stashpv ("Coro", TRUE); 4086 coro_stash = gv_stashpv ("Coro", TRUE);
1533 4087
1534 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 4088 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1535 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 4089 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1536 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 4090 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1537 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 4091 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1538 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 4092 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1539 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 4093 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1540
1541 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1542 coro_ready[i] = newAV ();
1543 4094
1544 { 4095 {
1545 SV *sv = perl_get_sv("Coro::API", 1); 4096 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1546 4097
1547 coroapi.schedule = api_schedule; 4098 coroapi.schedule = api_schedule;
1548 coroapi.save = api_save; 4099 coroapi.schedule_to = api_schedule_to;
1549 coroapi.cede = api_cede; 4100 coroapi.cede = api_cede;
1550 coroapi.cede_notself = api_cede_notself; 4101 coroapi.cede_notself = api_cede_notself;
1551 coroapi.ready = api_ready; 4102 coroapi.ready = api_ready;
1552 coroapi.is_ready = api_is_ready; 4103 coroapi.is_ready = api_is_ready;
1553 coroapi.nready = &coro_nready; 4104 coroapi.nready = coro_nready;
1554 coroapi.current = coro_current; 4105 coroapi.current = coro_current;
1555 4106
4107 coroapi.enterleave_hook = api_enterleave_hook;
4108 coroapi.enterleave_unhook = api_enterleave_unhook;
4109 coroapi.enterleave_scope_hook = api_enterleave_scope_hook;
4110
1556 GCoroAPI = &coroapi; 4111 /*GCoroAPI = &coroapi;*/
1557 sv_setiv (sv, (IV)&coroapi); 4112 sv_setiv (sv, PTR2IV (&coroapi));
1558 SvREADONLY_on (sv); 4113 SvREADONLY_on (sv);
1559 } 4114 }
1560} 4115}
4116
4117SV *
4118async (...)
4119 PROTOTYPE: &@
4120 CODE:
4121 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
4122 api_ready (aTHX_ RETVAL);
4123 OUTPUT:
4124 RETVAL
4125
4126void
4127_destroy (Coro::State coro)
4128 CODE:
4129 /* used by the manager thread */
4130 coro_state_destroy (aTHX_ coro);
4131
4132void
4133on_destroy (Coro::State coro, SV *cb)
4134 CODE:
4135 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
4136
4137void
4138join (...)
4139 CODE:
4140 CORO_EXECUTE_SLF_XS (slf_init_join);
4141
4142void
4143terminate (...)
4144 CODE:
4145 CORO_EXECUTE_SLF_XS (slf_init_terminate);
4146
4147void
4148cancel (...)
4149 CODE:
4150 CORO_EXECUTE_SLF_XS (slf_init_cancel);
4151
4152int
4153safe_cancel (Coro::State self, ...)
4154 C_ARGS: aTHX_ self, &ST (1), items - 1
4155
4156void
4157schedule (...)
4158 CODE:
4159 CORO_EXECUTE_SLF_XS (slf_init_schedule);
4160
4161void
4162schedule_to (...)
4163 CODE:
4164 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
4165
4166void
4167cede_to (...)
4168 CODE:
4169 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
4170
4171void
4172cede (...)
4173 CODE:
4174 CORO_EXECUTE_SLF_XS (slf_init_cede);
4175
4176void
4177cede_notself (...)
4178 CODE:
4179 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1561 4180
1562void 4181void
1563_set_current (SV *current) 4182_set_current (SV *current)
1564 PROTOTYPE: $ 4183 PROTOTYPE: $
1565 CODE: 4184 CODE:
1566 SvREFCNT_dec (SvRV (coro_current)); 4185 SvREFCNT_dec_NN (SvRV (coro_current));
1567 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 4186 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
4187
4188void
4189_set_readyhook (SV *hook)
4190 PROTOTYPE: $
4191 CODE:
4192 SvREFCNT_dec (coro_readyhook);
4193 SvGETMAGIC (hook);
4194 if (SvOK (hook))
4195 {
4196 coro_readyhook = newSVsv (hook);
4197 CORO_READYHOOK = invoke_sv_ready_hook_helper;
4198 }
4199 else
4200 {
4201 coro_readyhook = 0;
4202 CORO_READYHOOK = 0;
4203 }
1568 4204
1569int 4205int
1570prio (Coro::State coro, int newprio = 0) 4206prio (Coro::State coro, int newprio = 0)
4207 PROTOTYPE: $;$
1571 ALIAS: 4208 ALIAS:
1572 nice = 1 4209 nice = 1
1573 CODE: 4210 CODE:
1574{ 4211{
1575 RETVAL = coro->prio; 4212 RETVAL = coro->prio;
… …
1577 if (items > 1) 4214 if (items > 1)
1578 { 4215 {
1579 if (ix) 4216 if (ix)
1580 newprio = coro->prio - newprio; 4217 newprio = coro->prio - newprio;
1581 4218
1582 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 4219 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1583 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 4220 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1584 4221
1585 coro->prio = newprio; 4222 coro->prio = newprio;
1586 } 4223 }
1587} 4224}
1588 OUTPUT: 4225 OUTPUT:
… …
1590 4227
1591SV * 4228SV *
1592ready (SV *self) 4229ready (SV *self)
1593 PROTOTYPE: $ 4230 PROTOTYPE: $
1594 CODE: 4231 CODE:
1595 RETVAL = boolSV (api_ready (self)); 4232 RETVAL = boolSV (api_ready (aTHX_ self));
1596 OUTPUT: 4233 OUTPUT:
1597 RETVAL 4234 RETVAL
1598 4235
1599int 4236int
1600nready (...) 4237nready (...)
… …
1602 CODE: 4239 CODE:
1603 RETVAL = coro_nready; 4240 RETVAL = coro_nready;
1604 OUTPUT: 4241 OUTPUT:
1605 RETVAL 4242 RETVAL
1606 4243
1607# for async_pool speedup
1608void 4244void
1609_pool_1 (SV *cb) 4245suspend (Coro::State self)
4246 PROTOTYPE: $
1610 CODE: 4247 CODE:
1611{ 4248 self->flags |= CF_SUSPENDED;
1612 int i, len;
1613 HV *hv = (HV *)SvRV (coro_current);
1614 AV *defav = GvAV (PL_defgv);
1615 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1616 AV *invoke_av;
1617 4249
1618 if (!invoke) 4250void
1619 croak ("\3terminate\2\n"); 4251resume (Coro::State self)
4252 PROTOTYPE: $
4253 CODE:
4254 self->flags &= ~CF_SUSPENDED;
1620 4255
1621 hv_store (hv, "desc", sizeof ("desc") - 1, 4256void
1622 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 4257_pool_handler (...)
4258 CODE:
4259 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1623 4260
1624 invoke_av = (AV *)SvRV (invoke); 4261void
1625 len = av_len (invoke_av); 4262async_pool (SV *cv, ...)
4263 PROTOTYPE: &@
4264 PPCODE:
4265{
4266 HV *hv = (HV *)av_pop (av_async_pool);
4267 AV *av = newAV ();
4268 SV *cb = ST (0);
4269 int i;
1626 4270
1627 sv_setsv (cb, AvARRAY (invoke_av)[0]); 4271 av_extend (av, items - 2);
4272 for (i = 1; i < items; ++i)
4273 av_push (av, SvREFCNT_inc_NN (ST (i)));
1628 4274
1629 if (len > 0) 4275 if ((SV *)hv == &PL_sv_undef)
1630 { 4276 {
1631 av_fill (defav, len - 1); 4277 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
1632 for (i = 0; i < len; ++i) 4278 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
1633 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 4279 SvREFCNT_dec_NN (sv);
1634 } 4280 }
1635 4281
4282 {
4283 struct coro *coro = SvSTATE_hv (hv);
4284
4285 assert (!coro->invoke_cb);
4286 assert (!coro->invoke_av);
4287 coro->invoke_cb = SvREFCNT_inc (cb);
4288 coro->invoke_av = av;
4289 }
4290
4291 api_ready (aTHX_ (SV *)hv);
4292
4293 if (GIMME_V != G_VOID)
4294 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4295 else
1636 SvREFCNT_dec (invoke); 4296 SvREFCNT_dec_NN (hv);
1637} 4297}
1638 4298
1639void 4299SV *
1640_pool_2 (SV *cb) 4300rouse_cb ()
4301 PROTOTYPE:
1641 CODE: 4302 CODE:
1642{ 4303 RETVAL = coro_new_rouse_cb (aTHX);
1643 struct coro *coro = SvSTATE (coro_current);
1644
1645 sv_setsv (cb, &PL_sv_undef);
1646
1647 if (coro_rss (coro) > SvIV (sv_pool_rss)
1648 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1649 croak ("\3terminate\2\n");
1650
1651 av_clear (GvAV (PL_defgv));
1652 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1653 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1654 coro->save = CORO_SAVE_DEF;
1655 coro->prio = 0;
1656 av_push (av_async_pool, newSVsv (coro_current));
1657}
1658
1659
1660MODULE = Coro::State PACKAGE = Coro::AIO
1661
1662SV *
1663_get_state ()
1664 CODE:
1665{
1666 struct io_state *data;
1667
1668 RETVAL = newSV (sizeof (struct io_state));
1669 data = (struct io_state *)SvPVX (RETVAL);
1670 SvCUR_set (RETVAL, sizeof (struct io_state));
1671 SvPOK_only (RETVAL);
1672
1673 data->errorno = errno;
1674 data->laststype = PL_laststype;
1675 data->laststatval = PL_laststatval;
1676 data->statcache = PL_statcache;
1677}
1678 OUTPUT: 4304 OUTPUT:
1679 RETVAL 4305 RETVAL
1680 4306
1681void 4307void
1682_set_state (char *data_) 4308rouse_wait (...)
4309 PROTOTYPE: ;$
4310 PPCODE:
4311 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4312
4313void
4314on_enter (SV *block)
4315 ALIAS:
4316 on_leave = 1
1683 PROTOTYPE: $ 4317 PROTOTYPE: &
1684 CODE: 4318 CODE:
1685{ 4319{
1686 struct io_state *data = (void *)data_; 4320 struct coro *coro = SvSTATE_current;
4321 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1687 4322
1688 errno = data->errorno; 4323 block = s_get_cv_croak (block);
1689 PL_laststype = data->laststype;
1690 PL_laststatval = data->laststatval;
1691 PL_statcache = data->statcache;
1692}
1693 4324
4325 if (!*avp)
4326 *avp = newAV ();
4327
4328 av_push (*avp, SvREFCNT_inc (block));
4329
4330 if (!ix)
4331 on_enterleave_call (aTHX_ block);
4332
4333 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4334 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4335 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4336}
4337
4338
4339MODULE = Coro::State PACKAGE = PerlIO::cede
4340
4341BOOT:
4342 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4343
4344
4345MODULE = Coro::State PACKAGE = Coro::Semaphore
4346
4347SV *
4348new (SV *klass, SV *count = 0)
4349 CODE:
4350{
4351 int semcnt = 1;
4352
4353 if (count)
4354 {
4355 SvGETMAGIC (count);
4356
4357 if (SvOK (count))
4358 semcnt = SvIV (count);
4359 }
4360
4361 RETVAL = sv_bless (
4362 coro_waitarray_new (aTHX_ semcnt),
4363 GvSTASH (CvGV (cv))
4364 );
4365}
4366 OUTPUT:
4367 RETVAL
4368
4369# helper for Coro::Channel and others
4370SV *
4371_alloc (int count)
4372 CODE:
4373 RETVAL = coro_waitarray_new (aTHX_ count);
4374 OUTPUT:
4375 RETVAL
4376
4377SV *
4378count (SV *self)
4379 CODE:
4380 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4381 OUTPUT:
4382 RETVAL
4383
4384void
4385up (SV *self)
4386 CODE:
4387 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), 1);
4388
4389void
4390adjust (SV *self, int adjust)
4391 CODE:
4392 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), adjust);
4393
4394void
4395down (...)
4396 CODE:
4397 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4398
4399void
4400wait (...)
4401 CODE:
4402 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4403
4404void
4405try (SV *self)
4406 PPCODE:
4407{
4408 AV *av = (AV *)SvRV (self);
4409 SV *count_sv = AvARRAY (av)[0];
4410 IV count = SvIVX (count_sv);
4411
4412 if (count > 0)
4413 {
4414 --count;
4415 SvIVX (count_sv) = count;
4416 XSRETURN_YES;
4417 }
4418 else
4419 XSRETURN_NO;
4420}
4421
4422void
4423waiters (SV *self)
4424 PPCODE:
4425{
4426 AV *av = (AV *)SvRV (self);
4427 int wcount = AvFILLp (av) + 1 - 1;
4428
4429 if (GIMME_V == G_SCALAR)
4430 XPUSHs (sv_2mortal (newSViv (wcount)));
4431 else
4432 {
4433 int i;
4434 EXTEND (SP, wcount);
4435 for (i = 1; i <= wcount; ++i)
4436 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4437 }
4438}
4439
4440MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4441
4442void
4443_may_delete (SV *sem, int count, unsigned int extra_refs)
4444 PPCODE:
4445{
4446 AV *av = (AV *)SvRV (sem);
4447
4448 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4449 && AvFILLp (av) == 0 /* no waiters, just count */
4450 && SvIV (AvARRAY (av)[0]) == count)
4451 XSRETURN_YES;
4452
4453 XSRETURN_NO;
4454}
4455
4456MODULE = Coro::State PACKAGE = Coro::Signal
4457
4458SV *
4459new (SV *klass)
4460 CODE:
4461 RETVAL = sv_bless (
4462 coro_waitarray_new (aTHX_ 0),
4463 GvSTASH (CvGV (cv))
4464 );
4465 OUTPUT:
4466 RETVAL
4467
4468void
4469wait (...)
4470 CODE:
4471 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4472
4473void
4474broadcast (SV *self)
4475 CODE:
4476{
4477 AV *av = (AV *)SvRV (self);
4478 coro_signal_wake (aTHX_ av, AvFILLp (av));
4479}
4480
4481void
4482send (SV *self)
4483 CODE:
4484{
4485 AV *av = (AV *)SvRV (self);
4486
4487 if (AvFILLp (av))
4488 coro_signal_wake (aTHX_ av, 1);
4489 else
4490 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4491}
4492
4493IV
4494awaited (SV *self)
4495 CODE:
4496 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4497 OUTPUT:
4498 RETVAL
4499
4500
4501MODULE = Coro::State PACKAGE = Coro::AnyEvent
4502
4503BOOT:
4504 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4505
4506void
4507_schedule (...)
4508 CODE:
4509{
4510 static int incede;
4511
4512 api_cede_notself (aTHX);
4513
4514 ++incede;
4515 while (coro_nready >= incede && api_cede (aTHX))
4516 ;
4517
4518 sv_setsv (sv_activity, &PL_sv_undef);
4519 if (coro_nready >= incede)
4520 {
4521 PUSHMARK (SP);
4522 PUTBACK;
4523 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4524 }
4525
4526 --incede;
4527}
4528
4529
4530MODULE = Coro::State PACKAGE = Coro::AIO
4531
4532void
4533_register (char *target, char *proto, SV *req)
4534 CODE:
4535{
4536 SV *req_cv = s_get_cv_croak (req);
4537 /* newXSproto doesn't return the CV on 5.8 */
4538 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4539 sv_setpv ((SV *)slf_cv, proto);
4540 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4541}
4542
4543MODULE = Coro::State PACKAGE = Coro::Select
4544
4545void
4546patch_pp_sselect ()
4547 CODE:
4548 if (!coro_old_pp_sselect)
4549 {
4550 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4551 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4552 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4553 }
4554
4555void
4556unpatch_pp_sselect ()
4557 CODE:
4558 if (coro_old_pp_sselect)
4559 {
4560 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4561 coro_old_pp_sselect = 0;
4562 }
4563
4564MODULE = Coro::State PACKAGE = Coro::Util
4565
4566void
4567_exit (int code)
4568 CODE:
4569 _exit (code);
4570
4571NV
4572time ()
4573 CODE:
4574 RETVAL = nvtime (aTHX);
4575 OUTPUT:
4576 RETVAL
4577
4578NV
4579gettimeofday ()
4580 PPCODE:
4581{
4582 UV tv [2];
4583 u2time (aTHX_ tv);
4584 EXTEND (SP, 2);
4585 PUSHs (sv_2mortal (newSVuv (tv [0])));
4586 PUSHs (sv_2mortal (newSVuv (tv [1])));
4587}
4588

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