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Comparing Coro/Coro/State.xs (file contents):
Revision 1.221 by root, Sun Jan 13 09:47:22 2008 UTC vs.
Revision 1.437 by root, Tue Nov 5 15:13:42 2013 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1 /* perl usually disables NDEBUG later */
5
1#include "libcoro/coro.c" 6#include "libcoro/coro.c"
2 7
3#define PERL_NO_GET_CONTEXT 8#define PERL_NO_GET_CONTEXT
4#define PERL_EXT 9#define PERL_EXT
5 10
6#include "EXTERN.h" 11#include "EXTERN.h"
7#include "perl.h" 12#include "perl.h"
8#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
9 15
10#include "patchlevel.h" 16#include "schmorp.h"
11 17
18#define ECB_NO_THREADS 1
19#include "ecb.h"
20
21#include <stddef.h>
12#include <stdio.h> 22#include <stdio.h>
13#include <errno.h> 23#include <errno.h>
14#include <assert.h> 24#include <assert.h>
15#include <inttypes.h> /* portable stdint.h */
16 25
17#ifdef HAVE_MMAP 26#ifndef SVs_PADSTALE
18# include <unistd.h> 27# define SVs_PADSTALE 0
19# include <sys/mman.h>
20# ifndef MAP_ANONYMOUS
21# ifdef MAP_ANON
22# define MAP_ANONYMOUS MAP_ANON
23# else
24# undef HAVE_MMAP
25# endif 28#endif
29
30#ifdef PadARRAY
31# define NEWPADAPI 1
32# define newPADLIST(var) (Newz (0, var, 1, PADLIST), Newx (PadlistARRAY (var), 2, PAD *))
33#else
34typedef AV PADNAMELIST;
35# if !PERL_VERSION_ATLEAST(5,8,0)
36typedef AV PADLIST;
37typedef AV PAD;
26# endif 38# endif
27# include <limits.h> 39# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
28# ifndef PAGESIZE 40# define PadlistMAX(pl) AvFILLp (pl)
29# define PAGESIZE pagesize 41# define PadlistNAMES(pl) (*PadlistARRAY (pl))
30# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 42# define PadARRAY AvARRAY
31static long pagesize; 43# define PadMAX AvFILLp
32# else 44# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
33# define BOOT_PAGESIZE (void)0
34# endif 45#endif
46
47/* 5.19.something has replaced SVt_BIND by SVt_INVLIST */
48/* we just alias it to SVt_IV, as that is sufficient for swap_sv for now */
49#if PERL_VERSION_ATLEAST(5,19,0)
50# define SVt_BIND SVt_IV
51#endif
52
53#if defined(_WIN32)
54# undef HAS_GETTIMEOFDAY
55# undef setjmp
56# undef longjmp
57# undef _exit
58# define setjmp _setjmp /* deep magic */
35#else 59#else
36# define PAGESIZE 0 60# include <inttypes.h> /* most portable stdint.h */
37# define BOOT_PAGESIZE (void)0
38#endif
39
40#if CORO_USE_VALGRIND
41# include <valgrind/valgrind.h>
42# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
43#else
44# define REGISTER_STACK(cctx,start,end)
45#endif 61#endif
46 62
47/* the maximum number of idle cctx that will be pooled */ 63/* the maximum number of idle cctx that will be pooled */
48#define MAX_IDLE_CCTX 8 64static int cctx_max_idle = 4;
49 65
50#define PERL_VERSION_ATLEAST(a,b,c) \ 66#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
51 (PERL_REVISION > (a) \ 67# define HAS_SCOPESTACK_NAME 1
52 || (PERL_REVISION == (a) \
53 && (PERL_VERSION > (b) \
54 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
55
56#if !PERL_VERSION_ATLEAST (5,6,0)
57# ifndef PL_ppaddr
58# define PL_ppaddr ppaddr
59# endif
60# ifndef call_sv
61# define call_sv perl_call_sv
62# endif
63# ifndef get_sv
64# define get_sv perl_get_sv
65# endif
66# ifndef get_cv
67# define get_cv perl_get_cv
68# endif
69# ifndef IS_PADGV
70# define IS_PADGV(v) 0
71# endif
72# ifndef IS_PADCONST
73# define IS_PADCONST(v) 0
74# endif
75#endif
76
77/* 5.8.7 */
78#ifndef SvRV_set
79# define SvRV_set(s,v) SvRV(s) = (v)
80#endif
81
82/* 5.8.8 */
83#ifndef GV_NOTQUAL
84# define GV_NOTQUAL 0
85#endif
86#ifndef newSV
87# define newSV(l) NEWSV(0,l)
88#endif
89
90#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
91# undef CORO_STACKGUARD
92#endif
93
94#ifndef CORO_STACKGUARD
95# define CORO_STACKGUARD 0
96#endif 68#endif
97 69
98/* prefer perl internal functions over our own? */ 70/* prefer perl internal functions over our own? */
99#ifndef CORO_PREFER_PERL_FUNCTIONS 71#ifndef CORO_PREFER_PERL_FUNCTIONS
100# define CORO_PREFER_PERL_FUNCTIONS 0 72# define CORO_PREFER_PERL_FUNCTIONS 0
101#endif 73#endif
102 74
103/* The next macros try to return the current stack pointer, in an as 75/* The next macros try to return the current stack pointer, in an as
104 * portable way as possible. */ 76 * portable way as possible. */
105#define dSTACKLEVEL volatile char stacklevel
106#define STACKLEVEL ((void *)&stacklevel)
107
108#define IN_DESTRUCT (PL_main_cv == Nullcv)
109
110#if __GNUC__ >= 3 77#if __GNUC__ >= 4
111# define attribute(x) __attribute__(x) 78# define dSTACKLEVEL int stacklevel_dummy
112# define BARRIER __asm__ __volatile__ ("" : : : "memory") 79# define STACKLEVEL __builtin_frame_address (0)
113# define expect(expr,value) __builtin_expect ((expr),(value))
114#else 80#else
115# define attribute(x) 81# define dSTACKLEVEL volatile void *stacklevel
116# define BARRIER 82# define STACKLEVEL ((void *)&stacklevel)
117# define expect(expr,value) (expr)
118#endif 83#endif
119 84
120#define expect_false(expr) expect ((expr) != 0, 0) 85#define IN_DESTRUCT PL_dirty
121#define expect_true(expr) expect ((expr) != 0, 1)
122
123#define NOINLINE attribute ((noinline))
124 86
125#include "CoroAPI.h" 87#include "CoroAPI.h"
88#define GCoroAPI (&coroapi) /* very sneaky */
126 89
127#ifdef USE_ITHREADS 90#ifdef USE_ITHREADS
128static perl_mutex coro_mutex; 91# if CORO_PTHREAD
129# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 92static void *coro_thx;
130# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
131#else
132# define LOCK (void)0
133# define UNLOCK (void)0
134#endif 93# endif
94#endif
135 95
136/* helper storage struct for Coro::AIO */ 96#ifdef __linux
137struct io_state 97# include <time.h> /* for timespec */
138{ 98# include <syscall.h> /* for SYS_* */
139 int errorno; 99# ifdef SYS_clock_gettime
140 I32 laststype; 100# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
141 int laststatval; 101# define CORO_CLOCK_MONOTONIC 1
142 Stat_t statcache; 102# define CORO_CLOCK_THREAD_CPUTIME_ID 3
143}; 103# endif
104#endif
144 105
106static double (*nvtime)(); /* so why doesn't it take void? */
107static void (*u2time)(pTHX_ UV ret[2]);
108
109/* we hijack an hopefully unused CV flag for our purposes */
110#define CVf_SLF 0x4000
111static OP *pp_slf (pTHX);
112static void slf_destroy (pTHX_ struct coro *coro);
113
114static U32 cctx_gen;
145static size_t coro_stacksize = CORO_STACKSIZE; 115static size_t cctx_stacksize = CORO_STACKSIZE;
146static struct CoroAPI coroapi; 116static struct CoroAPI coroapi;
147static AV *main_mainstack; /* used to differentiate between $main and others */ 117static AV *main_mainstack; /* used to differentiate between $main and others */
148static JMPENV *main_top_env; 118static JMPENV *main_top_env;
149static HV *coro_state_stash, *coro_stash; 119static HV *coro_state_stash, *coro_stash;
150static volatile SV *coro_mortal; /* will be freed after next transfer */ 120static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
121
122static AV *av_destroy; /* destruction queue */
123static SV *sv_manager; /* the manager coro */
124static SV *sv_idle; /* $Coro::idle */
151 125
152static GV *irsgv; /* $/ */ 126static GV *irsgv; /* $/ */
153static GV *stdoutgv; /* *STDOUT */ 127static GV *stdoutgv; /* *STDOUT */
154static SV *rv_diehook; 128static SV *rv_diehook;
155static SV *rv_warnhook; 129static SV *rv_warnhook;
156static HV *hv_sig; /* %SIG */ 130static HV *hv_sig; /* %SIG */
157 131
158/* async_pool helper stuff */ 132/* async_pool helper stuff */
159static SV *sv_pool_rss; 133static SV *sv_pool_rss;
160static SV *sv_pool_size; 134static SV *sv_pool_size;
135static SV *sv_async_pool_idle; /* description string */
161static AV *av_async_pool; 136static AV *av_async_pool; /* idle pool */
137static SV *sv_Coro; /* class string */
138static CV *cv_pool_handler;
139
140/* Coro::AnyEvent */
141static SV *sv_activity;
142
143/* enable processtime/realtime profiling */
144static char enable_times;
145typedef U32 coro_ts[2];
146static coro_ts time_real, time_cpu;
147static char times_valid;
162 148
163static struct coro_cctx *cctx_first; 149static struct coro_cctx *cctx_first;
164static int cctx_count, cctx_idle; 150static int cctx_count, cctx_idle;
165 151
166enum { 152enum
153{
167 CC_MAPPED = 0x01, 154 CC_MAPPED = 0x01,
168 CC_NOREUSE = 0x02, /* throw this away after tracing */ 155 CC_NOREUSE = 0x02, /* throw this away after tracing */
169 CC_TRACE = 0x04, 156 CC_TRACE = 0x04,
170 CC_TRACE_SUB = 0x08, /* trace sub calls */ 157 CC_TRACE_SUB = 0x08, /* trace sub calls */
171 CC_TRACE_LINE = 0x10, /* trace each statement */ 158 CC_TRACE_LINE = 0x10, /* trace each statement */
172 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 159 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
173}; 160};
174 161
175/* this is a structure representing a c-level coroutine */ 162/* this is a structure representing a c-level coroutine */
176typedef struct coro_cctx { 163typedef struct coro_cctx
164{
177 struct coro_cctx *next; 165 struct coro_cctx *next;
178 166
179 /* the stack */ 167 /* the stack */
180 void *sptr; 168 struct coro_stack stack;
181 size_t ssize;
182 169
183 /* cpu state */ 170 /* cpu state */
184 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 171 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
172#ifndef NDEBUG
185 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 173 JMPENV *idle_te; /* same as idle_sp, but for top_env */
174#endif
186 JMPENV *top_env; 175 JMPENV *top_env;
187 coro_context cctx; 176 coro_context cctx;
188 177
178 U32 gen;
189#if CORO_USE_VALGRIND 179#if CORO_USE_VALGRIND
190 int valgrind_id; 180 int valgrind_id;
191#endif 181#endif
192 unsigned char flags; 182 unsigned char flags;
193} coro_cctx; 183} coro_cctx;
194 184
185static coro_cctx *cctx_current; /* the currently running cctx */
186
187/*****************************************************************************/
188
189static MGVTBL coro_state_vtbl;
190
195enum { 191enum
192{
196 CF_RUNNING = 0x0001, /* coroutine is running */ 193 CF_RUNNING = 0x0001, /* coroutine is running */
197 CF_READY = 0x0002, /* coroutine is ready */ 194 CF_READY = 0x0002, /* coroutine is ready */
198 CF_NEW = 0x0004, /* has never been switched to */ 195 CF_NEW = 0x0004, /* has never been switched to */
199 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 196 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
197 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
198 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
200}; 199};
201 200
202/* the structure where most of the perl state is stored, overlaid on the cxstack */ 201/* the structure where most of the perl state is stored, overlaid on the cxstack */
203typedef struct { 202typedef struct
204 SV *defsv; 203{
205 AV *defav;
206 SV *errsv;
207 SV *irsgv;
208#define VAR(name,type) type name; 204 #define VARx(name,expr,type) type name;
209# include "state.h" 205 #include "state.h"
210#undef VAR
211} perl_slots; 206} perl_slots;
212 207
208/* how many context stack entries do we need for perl_slots */
213#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 209#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
214 210
215/* this is a structure representing a perl-level coroutine */ 211/* this is a structure representing a perl-level coroutine */
216struct coro { 212struct coro
213{
217 /* the c coroutine allocated to this perl coroutine, if any */ 214 /* the C coroutine allocated to this perl coroutine, if any */
218 coro_cctx *cctx; 215 coro_cctx *cctx;
219 216
220 /* process data */ 217 /* ready queue */
218 struct coro *next_ready;
219
220 /* state data */
221 struct CoroSLF slf_frame; /* saved slf frame */
221 AV *mainstack; 222 AV *mainstack;
222 perl_slots *slot; /* basically the saved sp */ 223 perl_slots *slot; /* basically the saved sp */
223 224
225 CV *startcv; /* the CV to execute */
224 AV *args; /* data associated with this coroutine (initial args) */ 226 AV *args; /* data associated with this coroutine (initial args) */
225 int refcnt; /* coroutines are refcounted, yes */
226 int flags; /* CF_ flags */ 227 int flags; /* CF_ flags */
227 HV *hv; /* the perl hash associated with this coro, if any */ 228 HV *hv; /* the perl hash associated with this coro, if any */
228 229
229 /* statistics */ 230 /* statistics */
230 int usecount; /* number of transfers to this coro */ 231 int usecount; /* number of transfers to this coro */
231 232
232 /* coro process data */ 233 /* coro process data */
233 int prio; 234 int prio;
234 SV *throw; /* exception to be thrown */ 235 SV *except; /* exception to be thrown */
236 SV *rouse_cb; /* last rouse callback */
237 AV *on_destroy; /* callbacks or coros to notify on destroy */
238 AV *status; /* the exit status list */
235 239
236 /* async_pool */ 240 /* async_pool */
237 SV *saved_deffh; 241 SV *saved_deffh;
242 SV *invoke_cb;
243 AV *invoke_av;
244
245 /* on_enter/on_leave */
246 AV *on_enter;
247 AV *on_leave;
248
249 /* swap_sv */
250 AV *swap_sv;
251
252 /* times */
253 coro_ts t_cpu, t_real;
238 254
239 /* linked list */ 255 /* linked list */
240 struct coro *next, *prev; 256 struct coro *next, *prev;
241}; 257};
242 258
243typedef struct coro *Coro__State; 259typedef struct coro *Coro__State;
244typedef struct coro *Coro__State_or_hashref; 260typedef struct coro *Coro__State_or_hashref;
245 261
262/* the following variables are effectively part of the perl context */
263/* and get copied between struct coro and these variables */
264/* the main reason we don't support windows process emulation */
265static struct CoroSLF slf_frame; /* the current slf frame */
266
246/** Coro ********************************************************************/ 267/** Coro ********************************************************************/
247 268
248#define PRIO_MAX 3 269#define CORO_PRIO_MAX 3
249#define PRIO_HIGH 1 270#define CORO_PRIO_HIGH 1
250#define PRIO_NORMAL 0 271#define CORO_PRIO_NORMAL 0
251#define PRIO_LOW -1 272#define CORO_PRIO_LOW -1
252#define PRIO_IDLE -3 273#define CORO_PRIO_IDLE -3
253#define PRIO_MIN -4 274#define CORO_PRIO_MIN -4
254 275
255/* for Coro.pm */ 276/* for Coro.pm */
256static SV *coro_current; 277static SV *coro_current;
257static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 278static SV *coro_readyhook;
258static int coro_nready; 279static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
280static CV *cv_coro_run;
259static struct coro *coro_first; 281static struct coro *coro_first;
282#define coro_nready coroapi.nready
283
284/** JIT *********************************************************************/
285
286#if CORO_JIT
287 /* APPLE doesn't have mmap though */
288 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
289 #ifndef CORO_JIT_TYPE
290 #if ECB_AMD64 && CORO_JIT_UNIXY
291 #define CORO_JIT_TYPE "amd64-unix"
292 #elif __i386 && CORO_JIT_UNIXY
293 #define CORO_JIT_TYPE "x86-unix"
294 #endif
295 #endif
296#endif
297
298#if !defined(CORO_JIT_TYPE) || _POSIX_MEMORY_PROTECTION <= 0
299 #undef CORO_JIT
300#endif
301
302#if CORO_JIT
303 typedef void (*load_save_perl_slots_type)(perl_slots *);
304 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
305#endif
306
307/** Coro::Select ************************************************************/
308
309static OP *(*coro_old_pp_sselect) (pTHX);
310static SV *coro_select_select;
311
312/* horrible hack, but if it works... */
313static OP *
314coro_pp_sselect (pTHX)
315{
316 dSP;
317 PUSHMARK (SP - 4); /* fake argument list */
318 XPUSHs (coro_select_select);
319 PUTBACK;
320
321 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
322 PL_op->op_flags |= OPf_STACKED;
323 PL_op->op_private = 0;
324 return PL_ppaddr [OP_ENTERSUB](aTHX);
325}
326
327/** time stuff **************************************************************/
328
329#ifdef HAS_GETTIMEOFDAY
330
331ecb_inline void
332coro_u2time (pTHX_ UV ret[2])
333{
334 struct timeval tv;
335 gettimeofday (&tv, 0);
336
337 ret [0] = tv.tv_sec;
338 ret [1] = tv.tv_usec;
339}
340
341ecb_inline double
342coro_nvtime (void)
343{
344 struct timeval tv;
345 gettimeofday (&tv, 0);
346
347 return tv.tv_sec + tv.tv_usec * 1e-6;
348}
349
350ecb_inline void
351time_init (pTHX)
352{
353 nvtime = coro_nvtime;
354 u2time = coro_u2time;
355}
356
357#else
358
359ecb_inline void
360time_init (pTHX)
361{
362 SV **svp;
363
364 require_pv ("Time/HiRes.pm");
365
366 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
367
368 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
369 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
370
371 nvtime = INT2PTR (double (*)(), SvIV (*svp));
372
373 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
374 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
375}
376
377#endif
260 378
261/** lowlevel stuff **********************************************************/ 379/** lowlevel stuff **********************************************************/
262 380
263static SV * 381static SV * ecb_noinline
264coro_get_sv (pTHX_ const char *name, int create) 382coro_get_sv (pTHX_ const char *name, int create)
265{ 383{
266#if PERL_VERSION_ATLEAST (5,9,0) 384#if PERL_VERSION_ATLEAST (5,10,0)
267 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 385 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
268 get_sv (name, create); 386 get_sv (name, create);
269#endif 387#endif
270 return get_sv (name, create); 388 return get_sv (name, create);
271} 389}
272 390
273static AV * 391static AV * ecb_noinline
274coro_get_av (pTHX_ const char *name, int create) 392coro_get_av (pTHX_ const char *name, int create)
275{ 393{
276#if PERL_VERSION_ATLEAST (5,9,0) 394#if PERL_VERSION_ATLEAST (5,10,0)
277 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 395 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
278 get_av (name, create); 396 get_av (name, create);
279#endif 397#endif
280 return get_av (name, create); 398 return get_av (name, create);
281} 399}
282 400
283static HV * 401static HV * ecb_noinline
284coro_get_hv (pTHX_ const char *name, int create) 402coro_get_hv (pTHX_ const char *name, int create)
285{ 403{
286#if PERL_VERSION_ATLEAST (5,9,0) 404#if PERL_VERSION_ATLEAST (5,10,0)
287 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 405 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
288 get_hv (name, create); 406 get_hv (name, create);
289#endif 407#endif
290 return get_hv (name, create); 408 return get_hv (name, create);
291} 409}
292 410
293static AV * 411ecb_inline void
412coro_times_update (void)
413{
414#ifdef coro_clock_gettime
415 struct timespec ts;
416
417 ts.tv_sec = ts.tv_nsec = 0;
418 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
419 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
420
421 ts.tv_sec = ts.tv_nsec = 0;
422 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
423 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
424#else
425 dTHX;
426 UV tv[2];
427
428 u2time (aTHX_ tv);
429 time_real [0] = tv [0];
430 time_real [1] = tv [1] * 1000;
431#endif
432}
433
434ecb_inline void
435coro_times_add (struct coro *c)
436{
437 c->t_real [1] += time_real [1];
438 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
439 c->t_real [0] += time_real [0];
440
441 c->t_cpu [1] += time_cpu [1];
442 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
443 c->t_cpu [0] += time_cpu [0];
444}
445
446ecb_inline void
447coro_times_sub (struct coro *c)
448{
449 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
450 c->t_real [1] -= time_real [1];
451 c->t_real [0] -= time_real [0];
452
453 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
454 c->t_cpu [1] -= time_cpu [1];
455 c->t_cpu [0] -= time_cpu [0];
456}
457
458/*****************************************************************************/
459/* magic glue */
460
461#define CORO_MAGIC_type_cv 26
462#define CORO_MAGIC_type_state PERL_MAGIC_ext
463
464#define CORO_MAGIC_NN(sv, type) \
465 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
466 ? SvMAGIC (sv) \
467 : mg_find (sv, type))
468
469#define CORO_MAGIC(sv, type) \
470 (ecb_expect_true (SvMAGIC (sv)) \
471 ? CORO_MAGIC_NN (sv, type) \
472 : 0)
473
474#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
475#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
476
477ecb_inline MAGIC *
478SvSTATEhv_p (pTHX_ SV *coro)
479{
480 MAGIC *mg;
481
482 if (ecb_expect_true (
483 SvTYPE (coro) == SVt_PVHV
484 && (mg = CORO_MAGIC_state (coro))
485 && mg->mg_virtual == &coro_state_vtbl
486 ))
487 return mg;
488
489 return 0;
490}
491
492ecb_inline struct coro *
493SvSTATE_ (pTHX_ SV *coro)
494{
495 MAGIC *mg;
496
497 if (SvROK (coro))
498 coro = SvRV (coro);
499
500 mg = SvSTATEhv_p (aTHX_ coro);
501 if (!mg)
502 croak ("Coro::State object required");
503
504 return (struct coro *)mg->mg_ptr;
505}
506
507#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
508
509/* faster than SvSTATE, but expects a coroutine hv */
510#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
511#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
512
513/*****************************************************************************/
514/* padlist management and caching */
515
516ecb_inline PADLIST *
294coro_clone_padlist (pTHX_ CV *cv) 517coro_derive_padlist (pTHX_ CV *cv)
295{ 518{
296 AV *padlist = CvPADLIST (cv); 519 PADLIST *padlist = CvPADLIST (cv);
297 AV *newpadlist, *newpad; 520 PADLIST *newpadlist;
521 PAD *newpad;
522 PADOFFSET off = PadlistMAX (padlist) + 1;
298 523
299 newpadlist = newAV (); 524#if NEWPADAPI
525
526 /* if we had the original CvDEPTH, we might be able to steal the CvDEPTH+1 entry instead */
527 /* 20131102194744.GA6705@schmorp.de, 20131102195825.2013.qmail@lists-nntp.develooper.com */
528 while (!PadlistARRAY (padlist)[off - 1])
529 --off;
530
531 Perl_pad_push (aTHX_ padlist, off);
532
533 newpad = PadlistARRAY (padlist)[off];
534 PadlistARRAY (padlist)[off] = 0;
535
536#else
537
538#if PERL_VERSION_ATLEAST (5,10,0)
539 Perl_pad_push (aTHX_ padlist, off);
540#else
541 Perl_pad_push (aTHX_ padlist, off, 1);
542#endif
543
544 newpad = PadlistARRAY (padlist)[off];
545 PadlistMAX (padlist) = off - 1;
546
547#endif
548
549 newPADLIST (newpadlist);
550#if !PERL_VERSION_ATLEAST(5,15,3)
551 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
300 AvREAL_off (newpadlist); 552 AvREAL_off (newpadlist);
301#if PERL_VERSION_ATLEAST (5,9,0) 553#endif
302 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 554
555 /* Already extended to 2 elements by newPADLIST. */
556 PadlistMAX (newpadlist) = 1;
557 PadlistNAMES (newpadlist) = (PADNAMELIST *)SvREFCNT_inc_NN (PadlistNAMES (padlist));
558 PadlistARRAY (newpadlist)[1] = newpad;
559
560 return newpadlist;
561}
562
563ecb_inline void
564free_padlist (pTHX_ PADLIST *padlist)
565{
566 /* may be during global destruction */
567 if (!IN_DESTRUCT)
568 {
569 I32 i = PadlistMAX (padlist);
570
571 while (i > 0) /* special-case index 0 */
572 {
573 /* we try to be extra-careful here */
574 PAD *pad = PadlistARRAY (padlist)[i--];
575 I32 j = PadMAX (pad);
576
577 while (j >= 0)
578 SvREFCNT_dec (PadARRAY (pad)[j--]);
579
580 PadMAX (pad) = -1;
581 SvREFCNT_dec (pad);
582 }
583
584 SvREFCNT_dec (PadlistNAMES (padlist));
585
586#if NEWPADAPI
587 Safefree (PadlistARRAY (padlist));
588 Safefree (padlist);
303#else 589#else
304 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
305#endif
306 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
307 --AvFILLp (padlist);
308
309 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
310 av_store (newpadlist, 1, (SV *)newpad);
311
312 return newpadlist;
313}
314
315static void
316free_padlist (pTHX_ AV *padlist)
317{
318 /* may be during global destruction */
319 if (SvREFCNT (padlist))
320 {
321 I32 i = AvFILLp (padlist); 590 AvFILLp (padlist) = -1;
322 while (i >= 0) 591 AvREAL_off (padlist);
323 {
324 SV **svp = av_fetch (padlist, i--, FALSE);
325 if (svp)
326 {
327 SV *sv;
328 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
329 SvREFCNT_dec (sv);
330
331 SvREFCNT_dec (*svp);
332 }
333 }
334
335 SvREFCNT_dec ((SV*)padlist); 592 SvREFCNT_dec ((SV*)padlist);
593#endif
336 } 594 }
337} 595}
338 596
339static int 597static int
340coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 598coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
341{ 599{
342 AV *padlist; 600 PADLIST *padlist;
343 AV *av = (AV *)mg->mg_obj; 601 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
602 size_t len = *(size_t *)mg->mg_ptr;
344 603
345 /* casting is fun. */ 604 /* perl manages to free our internal AV and _then_ call us */
346 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 605 if (IN_DESTRUCT)
606 return 0;
607
608 while (len--)
347 free_padlist (aTHX_ padlist); 609 free_padlist (aTHX_ padlists[len]);
348 610
349 return 0; 611 return 0;
350} 612}
351
352#define CORO_MAGIC_type_cv PERL_MAGIC_ext
353#define CORO_MAGIC_type_state PERL_MAGIC_ext
354 613
355static MGVTBL coro_cv_vtbl = { 614static MGVTBL coro_cv_vtbl = {
356 0, 0, 0, 0, 615 0, 0, 0, 0,
357 coro_cv_free 616 coro_cv_free
358}; 617};
359 618
360#define CORO_MAGIC(sv,type) \
361 SvMAGIC (sv) \
362 ? SvMAGIC (sv)->mg_type == type \
363 ? SvMAGIC (sv) \
364 : mg_find (sv, type) \
365 : 0
366
367#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
368#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
369
370static struct coro *
371SvSTATE_ (pTHX_ SV *coro)
372{
373 HV *stash;
374 MAGIC *mg;
375
376 if (SvROK (coro))
377 coro = SvRV (coro);
378
379 if (expect_false (SvTYPE (coro) != SVt_PVHV))
380 croak ("Coro::State object required");
381
382 stash = SvSTASH (coro);
383 if (expect_false (stash != coro_stash && stash != coro_state_stash))
384 {
385 /* very slow, but rare, check */
386 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
387 croak ("Coro::State object required");
388 }
389
390 mg = CORO_MAGIC_state (coro);
391 return (struct coro *)mg->mg_ptr;
392}
393
394#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
395
396/* the next two functions merely cache the padlists */ 619/* the next two functions merely cache the padlists */
397static void 620ecb_inline void
398get_padlist (pTHX_ CV *cv) 621get_padlist (pTHX_ CV *cv)
399{ 622{
400 MAGIC *mg = CORO_MAGIC_cv (cv); 623 MAGIC *mg = CORO_MAGIC_cv (cv);
401 AV *av; 624 size_t *lenp;
402 625
403 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)) 626 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
404 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 627 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
405 else 628 else
406 { 629 {
407#if CORO_PREFER_PERL_FUNCTIONS 630#if CORO_PREFER_PERL_FUNCTIONS
408 /* this is probably cleaner, but also slower? */ 631 /* this is probably cleaner? but also slower! */
632 /* in practise, it seems to be less stable */
409 CV *cp = Perl_cv_clone (cv); 633 CV *cp = Perl_cv_clone (aTHX_ cv);
410 CvPADLIST (cv) = CvPADLIST (cp); 634 CvPADLIST (cv) = CvPADLIST (cp);
411 CvPADLIST (cp) = 0; 635 CvPADLIST (cp) = 0;
412 SvREFCNT_dec (cp); 636 SvREFCNT_dec (cp);
413#else 637#else
414 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 638 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
415#endif 639#endif
416 } 640 }
417} 641}
418 642
419static void 643ecb_inline void
420put_padlist (pTHX_ CV *cv) 644put_padlist (pTHX_ CV *cv)
421{ 645{
422 MAGIC *mg = CORO_MAGIC_cv (cv); 646 MAGIC *mg = CORO_MAGIC_cv (cv);
423 AV *av;
424 647
425 if (expect_false (!mg)) 648 if (ecb_expect_false (!mg))
649 {
426 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0); 650 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
651 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
652 mg->mg_len = 1; /* so mg_free frees mg_ptr */
653 }
654 else
655 Renew (mg->mg_ptr,
656 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
657 char);
427 658
428 av = (AV *)mg->mg_obj; 659 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
429
430 if (expect_false (AvFILLp (av) >= AvMAX (av)))
431 av_extend (av, AvMAX (av) + 1);
432
433 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
434} 660}
435 661
436/** load & save, init *******************************************************/ 662/** load & save, init *******************************************************/
663
664ecb_inline void
665swap_sv (SV *a, SV *b)
666{
667 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
668 SV tmp;
669
670 /* swap sv_any */
671 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
672
673 /* swap sv_flags */
674 SvFLAGS (&tmp) = SvFLAGS (a);
675 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
676 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
677
678#if PERL_VERSION_ATLEAST (5,10,0)
679 /* perl 5.10 and later complicates this _quite_ a bit, but it also
680 * is much faster, so no quarrels here. alternatively, we could
681 * sv_upgrade to avoid this.
682 */
683 {
684 /* swap sv_u */
685 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
686
687 /* if SvANY points to the head, we need to adjust the pointers,
688 * as the pointer for a still points to b, and maybe vice versa.
689 */
690 #define svany_in_head(type) \
691 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
692
693 if (svany_in_head (SvTYPE (a)))
694 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
695
696 if (svany_in_head (SvTYPE (b)))
697 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
698 }
699#endif
700}
701
702/* swap sv heads, at least logically */
703static void
704swap_svs (pTHX_ Coro__State c)
705{
706 int i;
707
708 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
709 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
710}
711
712#define SWAP_SVS(coro) \
713 if (ecb_expect_false ((coro)->swap_sv)) \
714 swap_svs (aTHX_ (coro))
715
716static void
717on_enterleave_call (pTHX_ SV *cb);
437 718
438static void 719static void
439load_perl (pTHX_ Coro__State c) 720load_perl (pTHX_ Coro__State c)
440{ 721{
441 perl_slots *slot = c->slot; 722 perl_slots *slot = c->slot;
442 c->slot = 0; 723 c->slot = 0;
443 724
444 PL_mainstack = c->mainstack; 725 PL_mainstack = c->mainstack;
445 726
446 GvSV (PL_defgv) = slot->defsv; 727#if CORO_JIT
447 GvAV (PL_defgv) = slot->defav; 728 load_perl_slots (slot);
448 GvSV (PL_errgv) = slot->errsv; 729#else
449 GvSV (irsgv) = slot->irsgv;
450
451 #define VAR(name,type) PL_ ## name = slot->name; 730 #define VARx(name,expr,type) expr = slot->name;
452 # include "state.h" 731 #include "state.h"
453 #undef VAR 732#endif
454 733
455 { 734 {
456 dSP; 735 dSP;
457 736
458 CV *cv; 737 CV *cv;
459 738
460 /* now do the ugly restore mess */ 739 /* now do the ugly restore mess */
461 while (expect_true (cv = (CV *)POPs)) 740 while (ecb_expect_true (cv = (CV *)POPs))
462 { 741 {
463 put_padlist (aTHX_ cv); /* mark this padlist as available */ 742 put_padlist (aTHX_ cv); /* mark this padlist as available */
464 CvDEPTH (cv) = PTR2IV (POPs); 743 CvDEPTH (cv) = PTR2IV (POPs);
465 CvPADLIST (cv) = (AV *)POPs; 744 CvPADLIST (cv) = (PADLIST *)POPs;
466 } 745 }
467 746
468 PUTBACK; 747 PUTBACK;
469 } 748 }
749
750 slf_frame = c->slf_frame;
751 CORO_THROW = c->except;
752
753 if (ecb_expect_false (enable_times))
754 {
755 if (ecb_expect_false (!times_valid))
756 coro_times_update ();
757
758 coro_times_sub (c);
759 }
760
761 if (ecb_expect_false (c->on_enter))
762 {
763 int i;
764
765 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
766 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
767 }
768
769 SWAP_SVS (c);
470} 770}
471 771
472static void 772static void
473save_perl (pTHX_ Coro__State c) 773save_perl (pTHX_ Coro__State c)
474{ 774{
775 SWAP_SVS (c);
776
777 if (ecb_expect_false (c->on_leave))
778 {
779 int i;
780
781 for (i = AvFILLp (c->on_leave); i >= 0; --i)
782 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
783 }
784
785 times_valid = 0;
786
787 if (ecb_expect_false (enable_times))
788 {
789 coro_times_update (); times_valid = 1;
790 coro_times_add (c);
791 }
792
793 c->except = CORO_THROW;
794 c->slf_frame = slf_frame;
795
475 { 796 {
476 dSP; 797 dSP;
477 I32 cxix = cxstack_ix; 798 I32 cxix = cxstack_ix;
478 PERL_CONTEXT *ccstk = cxstack; 799 PERL_CONTEXT *ccstk = cxstack;
479 PERL_SI *top_si = PL_curstackinfo; 800 PERL_SI *top_si = PL_curstackinfo;
… …
485 806
486 XPUSHs (Nullsv); 807 XPUSHs (Nullsv);
487 /* this loop was inspired by pp_caller */ 808 /* this loop was inspired by pp_caller */
488 for (;;) 809 for (;;)
489 { 810 {
490 while (expect_true (cxix >= 0)) 811 while (ecb_expect_true (cxix >= 0))
491 { 812 {
492 PERL_CONTEXT *cx = &ccstk[cxix--]; 813 PERL_CONTEXT *cx = &ccstk[cxix--];
493 814
494 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)) 815 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
495 { 816 {
496 CV *cv = cx->blk_sub.cv; 817 CV *cv = cx->blk_sub.cv;
497 818
498 if (expect_true (CvDEPTH (cv))) 819 if (ecb_expect_true (CvDEPTH (cv)))
499 { 820 {
500 EXTEND (SP, 3); 821 EXTEND (SP, 3);
501 PUSHs ((SV *)CvPADLIST (cv)); 822 PUSHs ((SV *)CvPADLIST (cv));
502 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 823 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
503 PUSHs ((SV *)cv); 824 PUSHs ((SV *)cv);
504 825
505 CvDEPTH (cv) = 0; 826 CvDEPTH (cv) = 0;
506 get_padlist (aTHX_ cv); 827 get_padlist (aTHX_ cv);
507 } 828 }
508 } 829 }
509 } 830 }
510 831
511 if (expect_true (top_si->si_type == PERLSI_MAIN)) 832 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
512 break; 833 break;
513 834
514 top_si = top_si->si_prev; 835 top_si = top_si->si_prev;
515 ccstk = top_si->si_cxstack; 836 ccstk = top_si->si_cxstack;
516 cxix = top_si->si_cxix; 837 cxix = top_si->si_cxix;
… …
518 839
519 PUTBACK; 840 PUTBACK;
520 } 841 }
521 842
522 /* allocate some space on the context stack for our purposes */ 843 /* allocate some space on the context stack for our purposes */
523 /* we manually unroll here, as usually 2 slots is enough */ 844 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
524 if (SLOT_COUNT >= 1) CXINC;
525 if (SLOT_COUNT >= 2) CXINC;
526 if (SLOT_COUNT >= 3) CXINC;
527 { 845 {
528 int i; 846 unsigned int i;
847
529 for (i = 3; i < SLOT_COUNT; ++i) 848 for (i = 0; i < SLOT_COUNT; ++i)
530 CXINC; 849 CXINC;
531 } 850
532 cxstack_ix -= SLOT_COUNT; /* undo allocation */ 851 cxstack_ix -= SLOT_COUNT; /* undo allocation */
852 }
533 853
534 c->mainstack = PL_mainstack; 854 c->mainstack = PL_mainstack;
535 855
536 { 856 {
537 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); 857 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
538 858
539 slot->defav = GvAV (PL_defgv); 859#if CORO_JIT
540 slot->defsv = DEFSV; 860 save_perl_slots (slot);
541 slot->errsv = ERRSV; 861#else
542 slot->irsgv = GvSV (irsgv);
543
544 #define VAR(name,type) slot->name = PL_ ## name; 862 #define VARx(name,expr,type) slot->name = expr;
545 # include "state.h" 863 #include "state.h"
546 #undef VAR 864#endif
547 } 865 }
548} 866}
549 867
550/* 868/*
551 * allocate various perl stacks. This is an exact copy 869 * allocate various perl stacks. This is almost an exact copy
552 * of perl.c:init_stacks, except that it uses less memory 870 * of perl.c:init_stacks, except that it uses less memory
553 * on the (sometimes correct) assumption that coroutines do 871 * on the (sometimes correct) assumption that coroutines do
554 * not usually need a lot of stackspace. 872 * not usually need a lot of stackspace.
555 */ 873 */
556#if CORO_PREFER_PERL_FUNCTIONS 874#if CORO_PREFER_PERL_FUNCTIONS
557# define coro_init_stacks init_stacks 875# define coro_init_stacks(thx) init_stacks ()
558#else 876#else
559static void 877static void
560coro_init_stacks (pTHX) 878coro_init_stacks (pTHX)
561{ 879{
562 PL_curstackinfo = new_stackinfo(32, 8); 880 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
563 PL_curstackinfo->si_type = PERLSI_MAIN; 881 PL_curstackinfo->si_type = PERLSI_MAIN;
564 PL_curstack = PL_curstackinfo->si_stack; 882 PL_curstack = PL_curstackinfo->si_stack;
565 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 883 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
566 884
567 PL_stack_base = AvARRAY(PL_curstack); 885 PL_stack_base = AvARRAY(PL_curstack);
… …
582#endif 900#endif
583 901
584 New(54,PL_scopestack,8,I32); 902 New(54,PL_scopestack,8,I32);
585 PL_scopestack_ix = 0; 903 PL_scopestack_ix = 0;
586 PL_scopestack_max = 8; 904 PL_scopestack_max = 8;
905#if HAS_SCOPESTACK_NAME
906 New(54,PL_scopestack_name,8,const char*);
907#endif
587 908
588 New(54,PL_savestack,24,ANY); 909 New(54,PL_savestack,24,ANY);
589 PL_savestack_ix = 0; 910 PL_savestack_ix = 0;
590 PL_savestack_max = 24; 911 PL_savestack_max = 24;
591 912
592#if !PERL_VERSION_ATLEAST (5,9,0) 913#if !PERL_VERSION_ATLEAST (5,10,0)
593 New(54,PL_retstack,4,OP*); 914 New(54,PL_retstack,4,OP*);
594 PL_retstack_ix = 0; 915 PL_retstack_ix = 0;
595 PL_retstack_max = 4; 916 PL_retstack_max = 4;
596#endif 917#endif
597} 918}
… …
599 920
600/* 921/*
601 * destroy the stacks, the callchain etc... 922 * destroy the stacks, the callchain etc...
602 */ 923 */
603static void 924static void
604coro_destroy_stacks (pTHX) 925coro_destruct_stacks (pTHX)
605{ 926{
606 while (PL_curstackinfo->si_next) 927 while (PL_curstackinfo->si_next)
607 PL_curstackinfo = PL_curstackinfo->si_next; 928 PL_curstackinfo = PL_curstackinfo->si_next;
608 929
609 while (PL_curstackinfo) 930 while (PL_curstackinfo)
… …
619 } 940 }
620 941
621 Safefree (PL_tmps_stack); 942 Safefree (PL_tmps_stack);
622 Safefree (PL_markstack); 943 Safefree (PL_markstack);
623 Safefree (PL_scopestack); 944 Safefree (PL_scopestack);
945#if HAS_SCOPESTACK_NAME
946 Safefree (PL_scopestack_name);
947#endif
624 Safefree (PL_savestack); 948 Safefree (PL_savestack);
625#if !PERL_VERSION_ATLEAST (5,9,0) 949#if !PERL_VERSION_ATLEAST (5,10,0)
626 Safefree (PL_retstack); 950 Safefree (PL_retstack);
627#endif 951#endif
628} 952}
953
954#define CORO_RSS \
955 rss += sizeof (SYM (curstackinfo)); \
956 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
957 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
958 rss += SYM (tmps_max) * sizeof (SV *); \
959 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
960 rss += SYM (scopestack_max) * sizeof (I32); \
961 rss += SYM (savestack_max) * sizeof (ANY);
629 962
630static size_t 963static size_t
631coro_rss (pTHX_ struct coro *coro) 964coro_rss (pTHX_ struct coro *coro)
632{ 965{
633 size_t rss = sizeof (*coro); 966 size_t rss = sizeof (*coro);
634 967
635 if (coro->mainstack) 968 if (coro->mainstack)
636 { 969 {
637 perl_slots tmp_slot;
638 perl_slots *slot;
639
640 if (coro->flags & CF_RUNNING) 970 if (coro->flags & CF_RUNNING)
641 { 971 {
642 slot = &tmp_slot; 972 #define SYM(sym) PL_ ## sym
643 973 CORO_RSS;
644 #define VAR(name,type) slot->name = PL_ ## name;
645 # include "state.h"
646 #undef VAR 974 #undef SYM
647 } 975 }
648 else 976 else
649 slot = coro->slot; 977 {
650 978 #define SYM(sym) coro->slot->sym
651 rss += sizeof (slot->curstackinfo); 979 CORO_RSS;
652 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 980 #undef SYM
653 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 981 }
654 rss += slot->tmps_max * sizeof (SV *);
655 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
656 rss += slot->scopestack_max * sizeof (I32);
657 rss += slot->savestack_max * sizeof (ANY);
658
659#if !PERL_VERSION_ATLEAST (5,9,0)
660 rss += slot->retstack_max * sizeof (OP *);
661#endif
662 } 982 }
663 983
664 return rss; 984 return rss;
665} 985}
666 986
667/** coroutine stack handling ************************************************/ 987/** coroutine stack handling ************************************************/
668 988
669static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg); 989static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
670static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg); 990static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
991static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
992
993/* apparently < 5.8.8 */
994#ifndef MgPV_nolen_const
995#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
996 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
997 (const char*)(mg)->mg_ptr)
998#endif
671 999
672/* 1000/*
673 * This overrides the default magic get method of %SIG elements. 1001 * This overrides the default magic get method of %SIG elements.
674 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook 1002 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
675 * and instead of tryign to save and restore the hash elements, we just provide 1003 * and instead of trying to save and restore the hash elements (extremely slow),
676 * readback here. 1004 * we just provide our own readback here.
677 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
678 * not expecting this to actually change the hook. This is a potential problem
679 * when a schedule happens then, but we ignore this.
680 */ 1005 */
681static int 1006static int ecb_cold
682coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg) 1007coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
683{ 1008{
684 const char *s = MgPV_nolen_const (mg); 1009 const char *s = MgPV_nolen_const (mg);
685 1010
686 if (*s == '_') 1011 if (*s == '_')
687 { 1012 {
688 if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0; 1013 SV **svp = 0;
689 if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0; 1014
1015 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1016 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1017
1018 if (svp)
1019 {
1020 SV *ssv;
1021
1022 if (!*svp)
1023 ssv = &PL_sv_undef;
1024 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1025 ssv = sv_2mortal (newRV_inc (*svp));
1026 else
1027 ssv = *svp;
1028
1029 sv_setsv (sv, ssv);
1030 return 0;
1031 }
690 } 1032 }
691 1033
692 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0; 1034 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
693} 1035}
694 1036
695static int 1037static int ecb_cold
696coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg) 1038coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
697{ 1039{
698 const char *s = MgPV_nolen_const (mg); 1040 const char *s = MgPV_nolen_const (mg);
699 1041
700 if (*s == '_') 1042 if (*s == '_')
701 { 1043 {
… …
705 if (strEQ (s, "__WARN__")) svp = &PL_warnhook; 1047 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
706 1048
707 if (svp) 1049 if (svp)
708 { 1050 {
709 SV *old = *svp; 1051 SV *old = *svp;
710 *svp = newSVsv (sv); 1052 *svp = 0;
711 SvREFCNT_dec (old); 1053 SvREFCNT_dec (old);
712 return; 1054 return 0;
713 } 1055 }
714 } 1056 }
715 1057
1058 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1059}
1060
1061static int ecb_cold
1062coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1063{
1064 const char *s = MgPV_nolen_const (mg);
1065
1066 if (*s == '_')
1067 {
1068 SV **svp = 0;
1069
1070 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1071 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1072
1073 if (svp)
1074 {
1075 SV *old = *svp;
1076 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1077 SvREFCNT_dec (old);
1078 return 0;
1079 }
1080 }
1081
716 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 1082 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
717} 1083}
718 1084
719static void 1085static void
1086prepare_nop (pTHX_ struct coro_transfer_args *ta)
1087{
1088 /* kind of mega-hacky, but works */
1089 ta->next = ta->prev = (struct coro *)ta;
1090}
1091
1092static int
1093slf_check_nop (pTHX_ struct CoroSLF *frame)
1094{
1095 return 0;
1096}
1097
1098static int
1099slf_check_repeat (pTHX_ struct CoroSLF *frame)
1100{
1101 return 1;
1102}
1103
1104static UNOP init_perl_op;
1105
1106ecb_noinline static void /* noinline to keep it out of the transfer fast path */
720coro_setup (pTHX_ struct coro *coro) 1107init_perl (pTHX_ struct coro *coro)
721{ 1108{
722 /* 1109 /*
723 * emulate part of the perl startup here. 1110 * emulate part of the perl startup here.
724 */ 1111 */
725 coro_init_stacks (aTHX); 1112 coro_init_stacks (aTHX);
726 1113
727 PL_runops = RUNOPS_DEFAULT; 1114 PL_runops = RUNOPS_DEFAULT;
728 PL_curcop = &PL_compiling; 1115 PL_curcop = &PL_compiling;
729 PL_in_eval = EVAL_NULL; 1116 PL_in_eval = EVAL_NULL;
730 PL_comppad = 0; 1117 PL_comppad = 0;
1118 PL_comppad_name = 0;
1119 PL_comppad_name_fill = 0;
1120 PL_comppad_name_floor = 0;
731 PL_curpm = 0; 1121 PL_curpm = 0;
732 PL_curpad = 0; 1122 PL_curpad = 0;
733 PL_localizing = 0; 1123 PL_localizing = 0;
734 PL_dirty = 0;
735 PL_restartop = 0; 1124 PL_restartop = 0;
1125#if PERL_VERSION_ATLEAST (5,10,0)
1126 PL_parser = 0;
1127#endif
1128 PL_hints = 0;
736 1129
737 /* recreate the die/warn hooks */ 1130 /* recreate the die/warn hooks */
738 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook ); 1131 PL_diehook = SvREFCNT_inc (rv_diehook);
739 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook); 1132 PL_warnhook = SvREFCNT_inc (rv_warnhook);
740 1133
741 GvSV (PL_defgv) = newSV (0); 1134 GvSV (PL_defgv) = newSV (0);
742 GvAV (PL_defgv) = coro->args; coro->args = 0; 1135 GvAV (PL_defgv) = coro->args; coro->args = 0;
743 GvSV (PL_errgv) = newSV (0); 1136 GvSV (PL_errgv) = newSV (0);
744 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 1137 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1138 GvHV (PL_hintgv) = 0;
745 PL_rs = newSVsv (GvSV (irsgv)); 1139 PL_rs = newSVsv (GvSV (irsgv));
746 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv); 1140 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
747 1141
748 { 1142 {
749 dSP; 1143 dSP;
750 LOGOP myop; 1144 UNOP myop;
751 1145
752 Zero (&myop, 1, LOGOP); 1146 Zero (&myop, 1, UNOP);
753 myop.op_next = Nullop; 1147 myop.op_next = Nullop;
1148 myop.op_type = OP_ENTERSUB;
754 myop.op_flags = OPf_WANT_VOID; 1149 myop.op_flags = OPf_WANT_VOID;
755 1150
756 PUSHMARK (SP); 1151 PUSHMARK (SP);
757 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 1152 PUSHs ((SV *)coro->startcv);
758 PUTBACK; 1153 PUTBACK;
759 PL_op = (OP *)&myop; 1154 PL_op = (OP *)&myop;
760 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1155 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
761 SPAGAIN;
762 } 1156 }
763 1157
764 /* this newly created coroutine might be run on an existing cctx which most 1158 /* this newly created coroutine might be run on an existing cctx which most
765 * likely was suspended in set_stacklevel, called from entersub. 1159 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
766 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
767 * so we ENTER here for symmetry
768 */ 1160 */
769 ENTER; 1161 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
770} 1162 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1163 slf_frame.destroy = 0;
771 1164
1165 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1166 init_perl_op.op_next = PL_op;
1167 init_perl_op.op_type = OP_ENTERSUB;
1168 init_perl_op.op_ppaddr = pp_slf;
1169 /* no flags etc. required, as an init function won't be called */
1170
1171 PL_op = (OP *)&init_perl_op;
1172
1173 /* copy throw, in case it was set before init_perl */
1174 CORO_THROW = coro->except;
1175
1176 SWAP_SVS (coro);
1177
1178 if (ecb_expect_false (enable_times))
1179 {
1180 coro_times_update ();
1181 coro_times_sub (coro);
1182 }
1183}
1184
772static void 1185static void
773coro_destroy (pTHX_ struct coro *coro) 1186coro_unwind_stacks (pTHX)
774{ 1187{
775 if (!IN_DESTRUCT) 1188 if (!IN_DESTRUCT)
776 { 1189 {
777 /* restore all saved variables and stuff */ 1190 /* restore all saved variables and stuff */
778 LEAVE_SCOPE (0); 1191 LEAVE_SCOPE (0);
… …
786 POPSTACK_TO (PL_mainstack); 1199 POPSTACK_TO (PL_mainstack);
787 1200
788 /* unwind main stack */ 1201 /* unwind main stack */
789 dounwind (-1); 1202 dounwind (-1);
790 } 1203 }
1204}
791 1205
792 SvREFCNT_dec (GvSV (PL_defgv)); 1206static void
793 SvREFCNT_dec (GvAV (PL_defgv)); 1207destroy_perl (pTHX_ struct coro *coro)
794 SvREFCNT_dec (GvSV (PL_errgv)); 1208{
795 SvREFCNT_dec (PL_defoutgv); 1209 SV *svf [9];
796 SvREFCNT_dec (PL_rs);
797 SvREFCNT_dec (GvSV (irsgv));
798 1210
799 SvREFCNT_dec (PL_diehook);
800 SvREFCNT_dec (PL_warnhook);
801 1211 {
1212 SV *old_current = SvRV (coro_current);
1213 struct coro *current = SvSTATE (old_current);
1214
1215 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1216
1217 save_perl (aTHX_ current);
1218
1219 /* this will cause transfer_check to croak on block*/
1220 SvRV_set (coro_current, (SV *)coro->hv);
1221
1222 load_perl (aTHX_ coro);
1223
1224 coro_unwind_stacks (aTHX);
1225
1226 /* restore swapped sv's */
1227 SWAP_SVS (coro);
1228
1229 coro_destruct_stacks (aTHX);
1230
1231 /* now save some sv's to be free'd later */
1232 svf [0] = GvSV (PL_defgv);
1233 svf [1] = (SV *)GvAV (PL_defgv);
1234 svf [2] = GvSV (PL_errgv);
1235 svf [3] = (SV *)PL_defoutgv;
1236 svf [4] = PL_rs;
1237 svf [5] = GvSV (irsgv);
1238 svf [6] = (SV *)GvHV (PL_hintgv);
1239 svf [7] = PL_diehook;
1240 svf [8] = PL_warnhook;
1241 assert (9 == sizeof (svf) / sizeof (*svf));
1242
1243 SvRV_set (coro_current, old_current);
1244
1245 load_perl (aTHX_ current);
1246 }
1247
1248 {
1249 unsigned int i;
1250
1251 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1252 SvREFCNT_dec (svf [i]);
1253
802 SvREFCNT_dec (coro->saved_deffh); 1254 SvREFCNT_dec (coro->saved_deffh);
803 SvREFCNT_dec (coro->throw); 1255 SvREFCNT_dec (coro->rouse_cb);
804 1256 SvREFCNT_dec (coro->invoke_cb);
805 coro_destroy_stacks (aTHX); 1257 SvREFCNT_dec (coro->invoke_av);
1258 }
806} 1259}
807 1260
808static void 1261ecb_inline void
809free_coro_mortal (pTHX) 1262free_coro_mortal (pTHX)
810{ 1263{
811 if (expect_true (coro_mortal)) 1264 if (ecb_expect_true (coro_mortal))
812 { 1265 {
813 SvREFCNT_dec (coro_mortal); 1266 SvREFCNT_dec ((SV *)coro_mortal);
814 coro_mortal = 0; 1267 coro_mortal = 0;
815 } 1268 }
816} 1269}
817 1270
818static int 1271static int
819runops_trace (pTHX) 1272runops_trace (pTHX)
820{ 1273{
821 COP *oldcop = 0; 1274 COP *oldcop = 0;
822 int oldcxix = -2; 1275 int oldcxix = -2;
823 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
824 coro_cctx *cctx = coro->cctx;
825 1276
826 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1277 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
827 { 1278 {
828 PERL_ASYNC_CHECK (); 1279 PERL_ASYNC_CHECK ();
829 1280
830 if (cctx->flags & CC_TRACE_ALL) 1281 if (cctx_current->flags & CC_TRACE_ALL)
831 { 1282 {
832 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1283 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
833 { 1284 {
834 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1285 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
835 SV **bot, **top; 1286 SV **bot, **top;
836 AV *av = newAV (); /* return values */ 1287 AV *av = newAV (); /* return values */
837 SV **cb; 1288 SV **cb;
… …
847 : cx->blk_gimme == G_SCALAR ? bot + 1 1298 : cx->blk_gimme == G_SCALAR ? bot + 1
848 : bot; 1299 : bot;
849 1300
850 av_extend (av, top - bot); 1301 av_extend (av, top - bot);
851 while (bot < top) 1302 while (bot < top)
852 av_push (av, SvREFCNT_inc (*bot++)); 1303 av_push (av, SvREFCNT_inc_NN (*bot++));
853 1304
854 PL_runops = RUNOPS_DEFAULT; 1305 PL_runops = RUNOPS_DEFAULT;
855 ENTER; 1306 ENTER;
856 SAVETMPS; 1307 SAVETMPS;
857 EXTEND (SP, 3); 1308 EXTEND (SP, 3);
… …
874 1325
875 if (PL_curcop != &PL_compiling) 1326 if (PL_curcop != &PL_compiling)
876 { 1327 {
877 SV **cb; 1328 SV **cb;
878 1329
879 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1330 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
880 { 1331 {
881 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1332 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
882 1333
883 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1334 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
884 { 1335 {
885 runops_proc_t old_runops = PL_runops;
886 dSP; 1336 dSP;
887 GV *gv = CvGV (cx->blk_sub.cv); 1337 GV *gv = CvGV (cx->blk_sub.cv);
888 SV *fullname = sv_2mortal (newSV (0)); 1338 SV *fullname = sv_2mortal (newSV (0));
889 1339
890 if (isGV (gv)) 1340 if (isGV (gv))
… …
895 SAVETMPS; 1345 SAVETMPS;
896 EXTEND (SP, 3); 1346 EXTEND (SP, 3);
897 PUSHMARK (SP); 1347 PUSHMARK (SP);
898 PUSHs (&PL_sv_yes); 1348 PUSHs (&PL_sv_yes);
899 PUSHs (fullname); 1349 PUSHs (fullname);
900 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1350 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
901 PUTBACK; 1351 PUTBACK;
902 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1352 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
903 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1353 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
904 SPAGAIN; 1354 SPAGAIN;
905 FREETMPS; 1355 FREETMPS;
… …
908 } 1358 }
909 1359
910 oldcxix = cxstack_ix; 1360 oldcxix = cxstack_ix;
911 } 1361 }
912 1362
913 if (cctx->flags & CC_TRACE_LINE) 1363 if (cctx_current->flags & CC_TRACE_LINE)
914 { 1364 {
915 dSP; 1365 dSP;
916 1366
917 PL_runops = RUNOPS_DEFAULT; 1367 PL_runops = RUNOPS_DEFAULT;
918 ENTER; 1368 ENTER;
… …
937 1387
938 TAINT_NOT; 1388 TAINT_NOT;
939 return 0; 1389 return 0;
940} 1390}
941 1391
942/* inject a fake call to Coro::State::_cctx_init into the execution */ 1392static struct CoroSLF cctx_ssl_frame;
943/* _cctx_init should be careful, as it could be called at almost any time */
944/* during execution of a perl program */
945static void NOINLINE
946cctx_prepare (pTHX_ coro_cctx *cctx)
947{
948 dSP;
949 LOGOP myop;
950 1393
1394static void
1395slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1396{
1397 ta->prev = 0;
1398}
1399
1400static int
1401slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1402{
1403 *frame = cctx_ssl_frame;
1404
1405 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1406}
1407
1408/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1409static void ecb_noinline
1410cctx_prepare (pTHX)
1411{
951 PL_top_env = &PL_start_env; 1412 PL_top_env = &PL_start_env;
952 1413
953 if (cctx->flags & CC_TRACE) 1414 if (cctx_current->flags & CC_TRACE)
954 PL_runops = runops_trace; 1415 PL_runops = runops_trace;
955 1416
956 Zero (&myop, 1, LOGOP); 1417 /* we already must be executing an SLF op, there is no other valid way
957 myop.op_next = PL_op; 1418 * that can lead to creation of a new cctx */
958 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1419 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1420 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
959 1421
960 PUSHMARK (SP); 1422 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
961 EXTEND (SP, 2); 1423 cctx_ssl_frame = slf_frame;
962 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1424
963 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1425 slf_frame.prepare = slf_prepare_set_stacklevel;
964 PUTBACK; 1426 slf_frame.check = slf_check_set_stacklevel;
965 PL_op = (OP *)&myop; 1427}
966 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1428
967 SPAGAIN; 1429/* the tail of transfer: execute stuff we can only do after a transfer */
1430ecb_inline void
1431transfer_tail (pTHX)
1432{
1433 free_coro_mortal (aTHX);
1434}
1435
1436/* try to exit the same way perl's main function would do */
1437/* we do not bother resetting the environment or other things *7
1438/* that are not, uhm, essential */
1439/* this obviously also doesn't work when perl is embedded */
1440static void ecb_noinline ecb_cold
1441perlish_exit (pTHX)
1442{
1443 int exitstatus = perl_destruct (PL_curinterp);
1444 perl_free (PL_curinterp);
1445 exit (exitstatus);
968} 1446}
969 1447
970/* 1448/*
971 * this is a _very_ stripped down perl interpreter ;) 1449 * this is a _very_ stripped down perl interpreter ;)
972 */ 1450 */
973static void 1451static void
974cctx_run (void *arg) 1452cctx_run (void *arg)
975{ 1453{
1454#ifdef USE_ITHREADS
1455# if CORO_PTHREAD
1456 PERL_SET_CONTEXT (coro_thx);
1457# endif
1458#endif
1459 {
976 dTHX; 1460 dTHX;
977 1461
978 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1462 /* normally we would need to skip the entersub here */
979 UNLOCK; 1463 /* not doing so will re-execute it, which is exactly what we want */
980
981 /* we now skip the entersub that lead to transfer() */
982 PL_op = PL_op->op_next; 1464 /* PL_nop = PL_nop->op_next */
983 1465
984 /* inject a fake subroutine call to cctx_init */ 1466 /* inject a fake subroutine call to cctx_init */
985 cctx_prepare (aTHX_ (coro_cctx *)arg); 1467 cctx_prepare (aTHX);
986 1468
1469 /* cctx_run is the alternative tail of transfer() */
1470 transfer_tail (aTHX);
1471
987 /* somebody or something will hit me for both perl_run and PL_restartop */ 1472 /* somebody or something will hit me for both perl_run and PL_restartop */
988 PL_restartop = PL_op; 1473 PL_restartop = PL_op;
989 perl_run (PL_curinterp); 1474 perl_run (PL_curinterp);
990
991 /* 1475 /*
1476 * Unfortunately, there is no way to get at the return values of the
1477 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1478 * runtime errors here, as this is just a random interpreter, not a thread.
1479 */
1480
1481 /*
992 * If perl-run returns we assume exit() was being called or the coro 1482 * If perl-run returns we assume exit() was being called or the coro
993 * fell off the end, which seems to be the only valid (non-bug) 1483 * fell off the end, which seems to be the only valid (non-bug)
994 * reason for perl_run to return. We try to exit by jumping to the 1484 * reason for perl_run to return. We try to mimic whatever perl is normally
995 * bootstrap-time "top" top_env, as we cannot restore the "main" 1485 * doing in that case. YMMV.
996 * coroutine as Coro has no such concept
997 */ 1486 */
998 PL_top_env = main_top_env; 1487 perlish_exit (aTHX);
999 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1488 }
1000} 1489}
1001 1490
1002static coro_cctx * 1491static coro_cctx *
1003cctx_new () 1492cctx_new (void)
1004{ 1493{
1005 coro_cctx *cctx; 1494 coro_cctx *cctx;
1006 void *stack_start;
1007 size_t stack_size;
1008 1495
1009 ++cctx_count; 1496 ++cctx_count;
1010
1011 Newz (0, cctx, 1, coro_cctx); 1497 New (0, cctx, 1, coro_cctx);
1012 1498
1013#if HAVE_MMAP 1499 cctx->gen = cctx_gen;
1014 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1500 cctx->flags = 0;
1015 /* mmap supposedly does allocate-on-write for us */ 1501 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1016 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1017 1502
1018 if (cctx->sptr != (void *)-1) 1503 return cctx;
1019 { 1504}
1020# if CORO_STACKGUARD 1505
1021 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1506/* create a new cctx only suitable as source */
1022# endif 1507static coro_cctx *
1023 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1508cctx_new_empty (void)
1024 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1509{
1025 cctx->flags |= CC_MAPPED; 1510 coro_cctx *cctx = cctx_new ();
1511
1512 cctx->stack.sptr = 0;
1513 coro_create (&cctx->cctx, 0, 0, 0, 0);
1514
1515 return cctx;
1516}
1517
1518/* create a new cctx suitable as destination/running a perl interpreter */
1519static coro_cctx *
1520cctx_new_run (void)
1521{
1522 coro_cctx *cctx = cctx_new ();
1523
1524 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
1026 } 1525 {
1027 else
1028#endif
1029 {
1030 cctx->ssize = coro_stacksize * (long)sizeof (long);
1031 New (0, cctx->sptr, coro_stacksize, long);
1032
1033 if (!cctx->sptr)
1034 {
1035 perror ("FATAL: unable to allocate stack for coroutine"); 1526 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1036 _exit (EXIT_FAILURE); 1527 _exit (EXIT_FAILURE);
1037 }
1038
1039 stack_start = cctx->sptr;
1040 stack_size = cctx->ssize;
1041 } 1528 }
1042 1529
1043 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1044 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1530 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
1045 1531
1046 return cctx; 1532 return cctx;
1047} 1533}
1048 1534
1049static void 1535static void
1050cctx_destroy (coro_cctx *cctx) 1536cctx_destroy (coro_cctx *cctx)
1051{ 1537{
1052 if (!cctx) 1538 if (!cctx)
1053 return; 1539 return;
1054 1540
1541 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1542
1055 --cctx_count; 1543 --cctx_count;
1544 coro_destroy (&cctx->cctx);
1056 1545
1057#if CORO_USE_VALGRIND 1546 coro_stack_free (&cctx->stack);
1058 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1059#endif
1060
1061#if HAVE_MMAP
1062 if (cctx->flags & CC_MAPPED)
1063 munmap (cctx->sptr, cctx->ssize);
1064 else
1065#endif
1066 Safefree (cctx->sptr);
1067 1547
1068 Safefree (cctx); 1548 Safefree (cctx);
1069} 1549}
1070 1550
1071/* wether this cctx should be destructed */ 1551/* wether this cctx should be destructed */
1072#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1552#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1073 1553
1074static coro_cctx * 1554static coro_cctx *
1075cctx_get (pTHX) 1555cctx_get (pTHX)
1076{ 1556{
1077 while (expect_true (cctx_first)) 1557 while (ecb_expect_true (cctx_first))
1078 { 1558 {
1079 coro_cctx *cctx = cctx_first; 1559 coro_cctx *cctx = cctx_first;
1080 cctx_first = cctx->next; 1560 cctx_first = cctx->next;
1081 --cctx_idle; 1561 --cctx_idle;
1082 1562
1083 if (expect_true (!CCTX_EXPIRED (cctx))) 1563 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
1084 return cctx; 1564 return cctx;
1085 1565
1086 cctx_destroy (cctx); 1566 cctx_destroy (cctx);
1087 } 1567 }
1088 1568
1089 return cctx_new (); 1569 return cctx_new_run ();
1090} 1570}
1091 1571
1092static void 1572static void
1093cctx_put (coro_cctx *cctx) 1573cctx_put (coro_cctx *cctx)
1094{ 1574{
1575 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1576
1095 /* free another cctx if overlimit */ 1577 /* free another cctx if overlimit */
1096 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1578 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1097 { 1579 {
1098 coro_cctx *first = cctx_first; 1580 coro_cctx *first = cctx_first;
1099 cctx_first = first->next; 1581 cctx_first = first->next;
1100 --cctx_idle; 1582 --cctx_idle;
1101 1583
… …
1110/** coroutine switching *****************************************************/ 1592/** coroutine switching *****************************************************/
1111 1593
1112static void 1594static void
1113transfer_check (pTHX_ struct coro *prev, struct coro *next) 1595transfer_check (pTHX_ struct coro *prev, struct coro *next)
1114{ 1596{
1597 /* TODO: throwing up here is considered harmful */
1598
1115 if (expect_true (prev != next)) 1599 if (ecb_expect_true (prev != next))
1116 { 1600 {
1117 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1601 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1118 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1602 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1119 1603
1120 if (expect_false (next->flags & CF_RUNNING)) 1604 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1121 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1122
1123 if (expect_false (next->flags & CF_DESTROYED))
1124 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1605 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1125 1606
1126 if (
1127#if PERL_VERSION_ATLEAST (5,9,0) 1607#if !PERL_VERSION_ATLEAST (5,10,0)
1128 expect_false (PL_parser)
1129#else
1130 expect_false (PL_lex_state != LEX_NOTPARSING) 1608 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1131#endif
1132 )
1133 croak ("Coro::State::transfer called while parsing, but this is not supported"); 1609 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1610#endif
1134 } 1611 }
1135} 1612}
1136 1613
1137/* always use the TRANSFER macro */ 1614/* always use the TRANSFER macro */
1138static void NOINLINE 1615static void ecb_noinline /* noinline so we have a fixed stackframe */
1139transfer (pTHX_ struct coro *prev, struct coro *next) 1616transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1140{ 1617{
1141 dSTACKLEVEL; 1618 dSTACKLEVEL;
1142 static volatile int has_throw;
1143 1619
1144 /* sometimes transfer is only called to set idle_sp */ 1620 /* sometimes transfer is only called to set idle_sp */
1145 if (expect_false (!next)) 1621 if (ecb_expect_false (!prev))
1146 { 1622 {
1147 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1623 cctx_current->idle_sp = STACKLEVEL;
1148 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1624 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1149 } 1625 }
1150 else if (expect_true (prev != next)) 1626 else if (ecb_expect_true (prev != next))
1151 { 1627 {
1152 coro_cctx *prev__cctx; 1628 coro_cctx *cctx_prev;
1153 1629
1154 if (expect_false (prev->flags & CF_NEW)) 1630 if (ecb_expect_false (prev->flags & CF_NEW))
1155 { 1631 {
1156 /* create a new empty context */ 1632 /* create a new empty/source context */
1157 Newz (0, prev->cctx, 1, coro_cctx);
1158 prev->flags &= ~CF_NEW; 1633 prev->flags &= ~CF_NEW;
1159 prev->flags |= CF_RUNNING; 1634 prev->flags |= CF_RUNNING;
1160 } 1635 }
1161 1636
1162 prev->flags &= ~CF_RUNNING; 1637 prev->flags &= ~CF_RUNNING;
1163 next->flags |= CF_RUNNING; 1638 next->flags |= CF_RUNNING;
1164 1639
1165 LOCK;
1166
1167 /* first get rid of the old state */ 1640 /* first get rid of the old state */
1168 save_perl (aTHX_ prev); 1641 save_perl (aTHX_ prev);
1169 1642
1170 if (expect_false (next->flags & CF_NEW)) 1643 if (ecb_expect_false (next->flags & CF_NEW))
1171 { 1644 {
1172 /* need to start coroutine */ 1645 /* need to start coroutine */
1173 next->flags &= ~CF_NEW; 1646 next->flags &= ~CF_NEW;
1174 /* setup coroutine call */ 1647 /* setup coroutine call */
1175 coro_setup (aTHX_ next); 1648 init_perl (aTHX_ next);
1176 } 1649 }
1177 else 1650 else
1178 load_perl (aTHX_ next); 1651 load_perl (aTHX_ next);
1179 1652
1180 prev__cctx = prev->cctx;
1181
1182 /* possibly "free" the cctx */ 1653 /* possibly untie and reuse the cctx */
1183 if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))) 1654 if (ecb_expect_true (
1655 cctx_current->idle_sp == STACKLEVEL
1656 && !(cctx_current->flags & CC_TRACE)
1657 && !force_cctx
1658 ))
1184 { 1659 {
1185 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1660 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1186 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1661 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1187 1662
1188 prev->cctx = 0;
1189
1190 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1663 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1191 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1664 /* without this the next cctx_get might destroy the running cctx while still in use */
1192 if (expect_false (CCTX_EXPIRED (prev__cctx))) 1665 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1193 if (!next->cctx) 1666 if (ecb_expect_true (!next->cctx))
1194 next->cctx = cctx_get (aTHX); 1667 next->cctx = cctx_get (aTHX);
1195 1668
1196 cctx_put (prev__cctx); 1669 cctx_put (cctx_current);
1197 } 1670 }
1671 else
1672 prev->cctx = cctx_current;
1198 1673
1199 ++next->usecount; 1674 ++next->usecount;
1200 1675
1201 if (expect_true (!next->cctx)) 1676 cctx_prev = cctx_current;
1202 next->cctx = cctx_get (aTHX); 1677 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1203 1678
1204 has_throw = !!next->throw; 1679 next->cctx = 0;
1205 1680
1206 if (expect_false (prev__cctx != next->cctx)) 1681 if (ecb_expect_false (cctx_prev != cctx_current))
1207 { 1682 {
1208 prev__cctx->top_env = PL_top_env; 1683 cctx_prev->top_env = PL_top_env;
1209 PL_top_env = next->cctx->top_env; 1684 PL_top_env = cctx_current->top_env;
1210 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1685 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1211 } 1686 }
1212 1687
1213 free_coro_mortal (aTHX); 1688 transfer_tail (aTHX);
1214 UNLOCK;
1215
1216 if (expect_false (has_throw))
1217 {
1218 struct coro *coro = SvSTATE (coro_current);
1219
1220 if (coro->throw)
1221 {
1222 SV *exception = coro->throw;
1223 coro->throw = 0;
1224 sv_setsv (ERRSV, exception);
1225 croak (0);
1226 }
1227 }
1228 } 1689 }
1229} 1690}
1230 1691
1231struct transfer_args
1232{
1233 struct coro *prev, *next;
1234};
1235
1236#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1692#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1237#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1693#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1238 1694
1239/** high level stuff ********************************************************/ 1695/** high level stuff ********************************************************/
1240 1696
1697/* this function is actually Coro, not Coro::State, but we call it from here */
1698/* because it is convenient - but it hasn't been declared yet for that reason */
1241static int 1699static void
1700coro_call_on_destroy (pTHX_ struct coro *coro);
1701
1702static void
1242coro_state_destroy (pTHX_ struct coro *coro) 1703coro_state_destroy (pTHX_ struct coro *coro)
1243{ 1704{
1244 if (coro->flags & CF_DESTROYED) 1705 if (coro->flags & CF_ZOMBIE)
1245 return 0; 1706 return;
1246 1707
1708 slf_destroy (aTHX_ coro);
1709
1247 coro->flags |= CF_DESTROYED; 1710 coro->flags |= CF_ZOMBIE;
1248 1711
1249 if (coro->flags & CF_READY) 1712 if (coro->flags & CF_READY)
1250 { 1713 {
1251 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1714 /* reduce nready, as destroying a ready coro effectively unreadies it */
1252 /* alternative: look through all ready queues and remove the coro */ 1715 /* alternative: look through all ready queues and remove the coro */
1253 LOCK;
1254 --coro_nready; 1716 --coro_nready;
1255 UNLOCK;
1256 } 1717 }
1257 else 1718 else
1258 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1719 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1259
1260 if (coro->mainstack && coro->mainstack != main_mainstack)
1261 {
1262 struct coro temp;
1263
1264 if (coro->flags & CF_RUNNING)
1265 croak ("FATAL: tried to destroy currently running coroutine");
1266
1267 save_perl (aTHX_ &temp);
1268 load_perl (aTHX_ coro);
1269
1270 coro_destroy (aTHX_ coro);
1271
1272 load_perl (aTHX_ &temp);
1273
1274 coro->slot = 0;
1275 }
1276
1277 cctx_destroy (coro->cctx);
1278 SvREFCNT_dec (coro->args);
1279 1720
1280 if (coro->next) coro->next->prev = coro->prev; 1721 if (coro->next) coro->next->prev = coro->prev;
1281 if (coro->prev) coro->prev->next = coro->next; 1722 if (coro->prev) coro->prev->next = coro->next;
1282 if (coro == coro_first) coro_first = coro->next; 1723 if (coro == coro_first) coro_first = coro->next;
1283 1724
1284 return 1; 1725 if (coro->mainstack
1726 && coro->mainstack != main_mainstack
1727 && coro->slot
1728 && !PL_dirty)
1729 destroy_perl (aTHX_ coro);
1730
1731 cctx_destroy (coro->cctx);
1732 SvREFCNT_dec (coro->startcv);
1733 SvREFCNT_dec (coro->args);
1734 SvREFCNT_dec (coro->swap_sv);
1735 SvREFCNT_dec (CORO_THROW);
1736
1737 coro_call_on_destroy (aTHX_ coro);
1738
1739 /* more destruction mayhem in coro_state_free */
1285} 1740}
1286 1741
1287static int 1742static int
1288coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1743coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1289{ 1744{
1290 struct coro *coro = (struct coro *)mg->mg_ptr; 1745 struct coro *coro = (struct coro *)mg->mg_ptr;
1291 mg->mg_ptr = 0; 1746 mg->mg_ptr = 0;
1292 1747
1293 coro->hv = 0;
1294
1295 if (--coro->refcnt < 0)
1296 {
1297 coro_state_destroy (aTHX_ coro); 1748 coro_state_destroy (aTHX_ coro);
1749 SvREFCNT_dec (coro->on_destroy);
1750 SvREFCNT_dec (coro->status);
1751
1298 Safefree (coro); 1752 Safefree (coro);
1299 }
1300 1753
1301 return 0; 1754 return 0;
1302} 1755}
1303 1756
1304static int 1757static int ecb_cold
1305coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1758coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1306{ 1759{
1307 struct coro *coro = (struct coro *)mg->mg_ptr; 1760 /* called when perl clones the current process the slow way (windows process emulation) */
1308 1761 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1309 ++coro->refcnt; 1762 mg->mg_ptr = 0;
1763 mg->mg_virtual = 0;
1310 1764
1311 return 0; 1765 return 0;
1312} 1766}
1313 1767
1314static MGVTBL coro_state_vtbl = { 1768static MGVTBL coro_state_vtbl = {
… …
1321# define MGf_DUP 0 1775# define MGf_DUP 0
1322#endif 1776#endif
1323}; 1777};
1324 1778
1325static void 1779static void
1326prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1780prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1327{ 1781{
1328 ta->prev = SvSTATE (prev_sv); 1782 ta->prev = SvSTATE (prev_sv);
1329 ta->next = SvSTATE (next_sv); 1783 ta->next = SvSTATE (next_sv);
1330 TRANSFER_CHECK (*ta); 1784 TRANSFER_CHECK (*ta);
1331} 1785}
1332 1786
1333static void 1787static void
1334api_transfer (SV *prev_sv, SV *next_sv) 1788api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1789{
1790 struct coro_transfer_args ta;
1791
1792 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1793 TRANSFER (ta, 1);
1794}
1795
1796/** Coro ********************************************************************/
1797
1798ecb_inline void
1799coro_enq (pTHX_ struct coro *coro)
1800{
1801 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1802
1803 SvREFCNT_inc_NN (coro->hv);
1804
1805 coro->next_ready = 0;
1806 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1807 ready [1] = coro;
1808}
1809
1810ecb_inline struct coro *
1811coro_deq (pTHX)
1812{
1813 int prio;
1814
1815 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1816 {
1817 struct coro **ready = coro_ready [prio];
1818
1819 if (ready [0])
1820 {
1821 struct coro *coro = ready [0];
1822 ready [0] = coro->next_ready;
1823 return coro;
1824 }
1825 }
1826
1827 return 0;
1828}
1829
1830static void
1831invoke_sv_ready_hook_helper (void)
1335{ 1832{
1336 dTHX; 1833 dTHX;
1337 struct transfer_args ta; 1834 dSP;
1338 1835
1339 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1836 ENTER;
1340 TRANSFER (ta); 1837 SAVETMPS;
1341}
1342 1838
1343/** Coro ********************************************************************/ 1839 PUSHMARK (SP);
1840 PUTBACK;
1841 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1344 1842
1345static void 1843 FREETMPS;
1346coro_enq (pTHX_ SV *coro_sv) 1844 LEAVE;
1347{
1348 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1349}
1350
1351static SV *
1352coro_deq (pTHX)
1353{
1354 int prio;
1355
1356 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1357 if (AvFILLp (coro_ready [prio]) >= 0)
1358 return av_shift (coro_ready [prio]);
1359
1360 return 0;
1361} 1845}
1362 1846
1363static int 1847static int
1364api_ready (SV *coro_sv) 1848api_ready (pTHX_ SV *coro_sv)
1365{ 1849{
1366 dTHX;
1367 struct coro *coro;
1368
1369 if (SvROK (coro_sv))
1370 coro_sv = SvRV (coro_sv);
1371
1372 coro = SvSTATE (coro_sv); 1850 struct coro *coro = SvSTATE (coro_sv);
1373 1851
1374 if (coro->flags & CF_READY) 1852 if (coro->flags & CF_READY)
1375 return 0; 1853 return 0;
1376 1854
1377 coro->flags |= CF_READY; 1855 coro->flags |= CF_READY;
1378 1856
1379 LOCK; 1857 coro_enq (aTHX_ coro);
1380 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1858
1381 ++coro_nready; 1859 if (!coro_nready++)
1382 UNLOCK; 1860 if (coroapi.readyhook)
1861 coroapi.readyhook ();
1383 1862
1384 return 1; 1863 return 1;
1385} 1864}
1386 1865
1387static int 1866static int
1388api_is_ready (SV *coro_sv) 1867api_is_ready (pTHX_ SV *coro_sv)
1389{ 1868{
1390 dTHX;
1391 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1869 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1392} 1870}
1393 1871
1394static void 1872/* expects to own a reference to next->hv */
1873ecb_inline void
1395prepare_schedule (pTHX_ struct transfer_args *ta) 1874prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1396{ 1875{
1397 SV *prev_sv, *next_sv;
1398
1399 for (;;)
1400 {
1401 LOCK;
1402 next_sv = coro_deq (aTHX);
1403
1404 /* nothing to schedule: call the idle handler */
1405 if (expect_false (!next_sv))
1406 {
1407 dSP;
1408 UNLOCK;
1409
1410 ENTER;
1411 SAVETMPS;
1412
1413 PUSHMARK (SP);
1414 PUTBACK;
1415 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1416 SPAGAIN;
1417
1418 FREETMPS;
1419 LEAVE;
1420 continue;
1421 }
1422
1423 ta->next = SvSTATE (next_sv);
1424
1425 /* cannot transfer to destroyed coros, skip and look for next */
1426 if (expect_false (ta->next->flags & CF_DESTROYED))
1427 {
1428 UNLOCK;
1429 SvREFCNT_dec (next_sv);
1430 /* coro_nready is already taken care of by destroy */
1431 continue;
1432 }
1433
1434 --coro_nready;
1435 UNLOCK;
1436 break;
1437 }
1438
1439 /* free this only after the transfer */
1440 prev_sv = SvRV (coro_current); 1876 SV *prev_sv = SvRV (coro_current);
1877
1441 ta->prev = SvSTATE (prev_sv); 1878 ta->prev = SvSTATE_hv (prev_sv);
1879 ta->next = next;
1880
1442 TRANSFER_CHECK (*ta); 1881 TRANSFER_CHECK (*ta);
1443 assert (ta->next->flags & CF_READY); 1882
1444 ta->next->flags &= ~CF_READY;
1445 SvRV_set (coro_current, next_sv); 1883 SvRV_set (coro_current, (SV *)next->hv);
1446 1884
1447 LOCK;
1448 free_coro_mortal (aTHX); 1885 free_coro_mortal (aTHX);
1449 coro_mortal = prev_sv; 1886 coro_mortal = prev_sv;
1450 UNLOCK;
1451} 1887}
1452 1888
1453static void 1889static void
1890prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1891{
1892 for (;;)
1893 {
1894 struct coro *next = coro_deq (aTHX);
1895
1896 if (ecb_expect_true (next))
1897 {
1898 /* cannot transfer to destroyed coros, skip and look for next */
1899 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1900 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1901 else
1902 {
1903 next->flags &= ~CF_READY;
1904 --coro_nready;
1905
1906 prepare_schedule_to (aTHX_ ta, next);
1907 break;
1908 }
1909 }
1910 else
1911 {
1912 /* nothing to schedule: call the idle handler */
1913 if (SvROK (sv_idle)
1914 && SvOBJECT (SvRV (sv_idle)))
1915 {
1916 if (SvRV (sv_idle) == SvRV (coro_current))
1917 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1918
1919 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1920 api_ready (aTHX_ SvRV (sv_idle));
1921 --coro_nready;
1922 }
1923 else
1924 {
1925 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1926 dSP;
1927
1928 ENTER;
1929 SAVETMPS;
1930
1931 PUSHMARK (SP);
1932 PUTBACK;
1933 call_sv (sv_idle, G_VOID | G_DISCARD);
1934
1935 FREETMPS;
1936 LEAVE;
1937 }
1938 }
1939 }
1940}
1941
1942ecb_inline void
1454prepare_cede (pTHX_ struct transfer_args *ta) 1943prepare_cede (pTHX_ struct coro_transfer_args *ta)
1455{ 1944{
1456 api_ready (coro_current); 1945 api_ready (aTHX_ coro_current);
1457 prepare_schedule (aTHX_ ta); 1946 prepare_schedule (aTHX_ ta);
1458} 1947}
1459 1948
1949ecb_inline void
1950prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1951{
1952 SV *prev = SvRV (coro_current);
1953
1954 if (coro_nready)
1955 {
1956 prepare_schedule (aTHX_ ta);
1957 api_ready (aTHX_ prev);
1958 }
1959 else
1960 prepare_nop (aTHX_ ta);
1961}
1962
1963static void
1964api_schedule (pTHX)
1965{
1966 struct coro_transfer_args ta;
1967
1968 prepare_schedule (aTHX_ &ta);
1969 TRANSFER (ta, 1);
1970}
1971
1972static void
1973api_schedule_to (pTHX_ SV *coro_sv)
1974{
1975 struct coro_transfer_args ta;
1976 struct coro *next = SvSTATE (coro_sv);
1977
1978 SvREFCNT_inc_NN (coro_sv);
1979 prepare_schedule_to (aTHX_ &ta, next);
1980}
1981
1460static int 1982static int
1461prepare_cede_notself (pTHX_ struct transfer_args *ta) 1983api_cede (pTHX)
1462{ 1984{
1463 if (coro_nready) 1985 struct coro_transfer_args ta;
1464 { 1986
1465 SV *prev = SvRV (coro_current);
1466 prepare_schedule (aTHX_ ta); 1987 prepare_cede (aTHX_ &ta);
1467 api_ready (prev); 1988
1989 if (ecb_expect_true (ta.prev != ta.next))
1990 {
1991 TRANSFER (ta, 1);
1468 return 1; 1992 return 1;
1469 } 1993 }
1470 else 1994 else
1471 return 0; 1995 return 0;
1472} 1996}
1473 1997
1474static void
1475api_schedule (void)
1476{
1477 dTHX;
1478 struct transfer_args ta;
1479
1480 prepare_schedule (aTHX_ &ta);
1481 TRANSFER (ta);
1482}
1483
1484static int 1998static int
1485api_cede (void) 1999api_cede_notself (pTHX)
1486{ 2000{
1487 dTHX; 2001 if (coro_nready)
2002 {
1488 struct transfer_args ta; 2003 struct coro_transfer_args ta;
1489 2004
1490 prepare_cede (aTHX_ &ta); 2005 prepare_cede_notself (aTHX_ &ta);
1491
1492 if (expect_true (ta.prev != ta.next))
1493 {
1494 TRANSFER (ta); 2006 TRANSFER (ta, 1);
1495 return 1; 2007 return 1;
1496 } 2008 }
1497 else 2009 else
1498 return 0; 2010 return 0;
1499} 2011}
1500 2012
1501static int 2013static void
1502api_cede_notself (void)
1503{
1504 dTHX;
1505 struct transfer_args ta;
1506
1507 if (prepare_cede_notself (aTHX_ &ta))
1508 {
1509 TRANSFER (ta);
1510 return 1;
1511 }
1512 else
1513 return 0;
1514}
1515
1516static void
1517api_trace (SV *coro_sv, int flags) 2014api_trace (pTHX_ SV *coro_sv, int flags)
1518{ 2015{
1519 dTHX;
1520 struct coro *coro = SvSTATE (coro_sv); 2016 struct coro *coro = SvSTATE (coro_sv);
1521 2017
2018 if (coro->flags & CF_RUNNING)
2019 croak ("cannot enable tracing on a running coroutine, caught");
2020
1522 if (flags & CC_TRACE) 2021 if (flags & CC_TRACE)
1523 { 2022 {
1524 if (!coro->cctx) 2023 if (!coro->cctx)
1525 coro->cctx = cctx_new (); 2024 coro->cctx = cctx_new_run ();
1526 else if (!(coro->cctx->flags & CC_TRACE)) 2025 else if (!(coro->cctx->flags & CC_TRACE))
1527 croak ("cannot enable tracing on coroutine with custom stack"); 2026 croak ("cannot enable tracing on coroutine with custom stack, caught");
1528 2027
1529 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 2028 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1530 } 2029 }
1531 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 2030 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1532 { 2031 {
… …
1537 else 2036 else
1538 coro->slot->runops = RUNOPS_DEFAULT; 2037 coro->slot->runops = RUNOPS_DEFAULT;
1539 } 2038 }
1540} 2039}
1541 2040
2041static void
2042coro_push_av (pTHX_ AV *av, I32 gimme_v)
2043{
2044 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2045 {
2046 dSP;
2047
2048 if (gimme_v == G_SCALAR)
2049 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2050 else
2051 {
2052 int i;
2053 EXTEND (SP, AvFILLp (av) + 1);
2054
2055 for (i = 0; i <= AvFILLp (av); ++i)
2056 PUSHs (AvARRAY (av)[i]);
2057 }
2058
2059 PUTBACK;
2060 }
2061}
2062
2063static void
2064coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2065{
2066 if (!coro->on_destroy)
2067 coro->on_destroy = newAV ();
2068
2069 av_push (coro->on_destroy, cb);
2070}
2071
2072static void
2073slf_destroy_join (pTHX_ struct CoroSLF *frame)
2074{
2075 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2076}
2077
2078static int
2079slf_check_join (pTHX_ struct CoroSLF *frame)
2080{
2081 struct coro *coro = (struct coro *)frame->data;
2082
2083 if (!coro->status)
2084 return 1;
2085
2086 frame->destroy = 0;
2087
2088 coro_push_av (aTHX_ coro->status, GIMME_V);
2089
2090 SvREFCNT_dec ((SV *)coro->hv);
2091
2092 return 0;
2093}
2094
2095static void
2096slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2097{
2098 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2099
2100 if (items > 1)
2101 croak ("join called with too many arguments");
2102
2103 if (coro->status)
2104 frame->prepare = prepare_nop;
2105 else
2106 {
2107 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2108 frame->prepare = prepare_schedule;
2109 }
2110
2111 frame->check = slf_check_join;
2112 frame->destroy = slf_destroy_join;
2113 frame->data = (void *)coro;
2114 SvREFCNT_inc (coro->hv);
2115}
2116
2117static void
2118coro_call_on_destroy (pTHX_ struct coro *coro)
2119{
2120 AV *od = coro->on_destroy;
2121
2122 if (!od)
2123 return;
2124
2125 coro->on_destroy = 0;
2126 sv_2mortal ((SV *)od);
2127
2128 while (AvFILLp (od) >= 0)
2129 {
2130 SV *cb = sv_2mortal (av_pop (od));
2131
2132 /* coro hv's (and only hv's at the moment) are supported as well */
2133 if (SvSTATEhv_p (aTHX_ cb))
2134 api_ready (aTHX_ cb);
2135 else
2136 {
2137 dSP; /* don't disturb outer sp */
2138 PUSHMARK (SP);
2139
2140 if (coro->status)
2141 {
2142 PUTBACK;
2143 coro_push_av (aTHX_ coro->status, G_ARRAY);
2144 SPAGAIN;
2145 }
2146
2147 PUTBACK;
2148 call_sv (cb, G_VOID | G_DISCARD);
2149 }
2150 }
2151}
2152
2153static void
2154coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2155{
2156 AV *av;
2157
2158 if (coro->status)
2159 {
2160 av = coro->status;
2161 av_clear (av);
2162 }
2163 else
2164 av = coro->status = newAV ();
2165
2166 /* items are actually not so common, so optimise for this case */
2167 if (items)
2168 {
2169 int i;
2170
2171 av_extend (av, items - 1);
2172
2173 for (i = 0; i < items; ++i)
2174 av_push (av, SvREFCNT_inc_NN (arg [i]));
2175 }
2176}
2177
2178static void
2179slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2180{
2181 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2182 api_ready (aTHX_ sv_manager);
2183
2184 frame->prepare = prepare_schedule;
2185 frame->check = slf_check_repeat;
2186
2187 /* as a minor optimisation, we could unwind all stacks here */
2188 /* but that puts extra pressure on pp_slf, and is not worth much */
2189 /*coro_unwind_stacks (aTHX);*/
2190}
2191
2192static void
2193slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2194{
2195 HV *coro_hv = (HV *)SvRV (coro_current);
2196
2197 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2198 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2199}
2200
2201static void
2202slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2203{
2204 HV *coro_hv;
2205 struct coro *coro;
2206
2207 if (items <= 0)
2208 croak ("Coro::cancel called without coro object,");
2209
2210 coro = SvSTATE (arg [0]);
2211 coro_hv = coro->hv;
2212
2213 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2214
2215 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2216 {
2217 /* coro currently busy cancelling something, so just notify it */
2218 coro->slf_frame.data = (void *)coro;
2219
2220 frame->prepare = prepare_nop;
2221 frame->check = slf_check_nop;
2222 }
2223 else if (coro_hv == (HV *)SvRV (coro_current))
2224 {
2225 /* cancelling the current coro is allowed, and equals terminate */
2226 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2227 }
2228 else
2229 {
2230 struct coro *self = SvSTATE_current;
2231
2232 /* otherwise we cancel directly, purely for speed reasons
2233 * unfortunately, this requires some magic trickery, as
2234 * somebody else could cancel us, so we have to fight the cancellation.
2235 * this is ugly, and hopefully fully worth the extra speed.
2236 * besides, I can't get the slow-but-safe version working...
2237 */
2238 slf_frame.data = 0;
2239 self->flags |= CF_NOCANCEL;
2240 coro_state_destroy (aTHX_ coro);
2241 self->flags &= ~CF_NOCANCEL;
2242
2243 if (slf_frame.data)
2244 {
2245 /* while we were busy we have been cancelled, so terminate */
2246 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2247 }
2248 else
2249 {
2250 frame->prepare = prepare_nop;
2251 frame->check = slf_check_nop;
2252 }
2253 }
2254}
2255
2256static int
2257slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2258{
2259 frame->prepare = 0;
2260 coro_unwind_stacks (aTHX);
2261
2262 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2263
2264 return 1;
2265}
2266
2267static int
2268safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2269{
2270 if (coro->cctx)
2271 croak ("coro inside C callback, unable to cancel at this time, caught");
2272
2273 if (coro->flags & CF_NEW)
2274 {
2275 coro_set_status (aTHX_ coro, arg, items);
2276 coro_state_destroy (aTHX_ coro);
2277 }
2278 else
2279 {
2280 if (!coro->slf_frame.prepare)
2281 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2282
2283 slf_destroy (aTHX_ coro);
2284
2285 coro_set_status (aTHX_ coro, arg, items);
2286 coro->slf_frame.prepare = prepare_nop;
2287 coro->slf_frame.check = slf_check_safe_cancel;
2288
2289 api_ready (aTHX_ (SV *)coro->hv);
2290 }
2291
2292 return 1;
2293}
2294
2295/*****************************************************************************/
2296/* async pool handler */
2297
2298static int
2299slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2300{
2301 HV *hv = (HV *)SvRV (coro_current);
2302 struct coro *coro = (struct coro *)frame->data;
2303
2304 if (!coro->invoke_cb)
2305 return 1; /* loop till we have invoke */
2306 else
2307 {
2308 hv_store (hv, "desc", sizeof ("desc") - 1,
2309 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2310
2311 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2312
2313 {
2314 dSP;
2315 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2316 PUTBACK;
2317 }
2318
2319 SvREFCNT_dec (GvAV (PL_defgv));
2320 GvAV (PL_defgv) = coro->invoke_av;
2321 coro->invoke_av = 0;
2322
2323 return 0;
2324 }
2325}
2326
2327static void
2328slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2329{
2330 HV *hv = (HV *)SvRV (coro_current);
2331 struct coro *coro = SvSTATE_hv ((SV *)hv);
2332
2333 if (ecb_expect_true (coro->saved_deffh))
2334 {
2335 /* subsequent iteration */
2336 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2337 coro->saved_deffh = 0;
2338
2339 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2340 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2341 {
2342 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2343 return;
2344 }
2345 else
2346 {
2347 av_clear (GvAV (PL_defgv));
2348 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2349
2350 coro->prio = 0;
2351
2352 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2353 api_trace (aTHX_ coro_current, 0);
2354
2355 frame->prepare = prepare_schedule;
2356 av_push (av_async_pool, SvREFCNT_inc (hv));
2357 }
2358 }
2359 else
2360 {
2361 /* first iteration, simply fall through */
2362 frame->prepare = prepare_nop;
2363 }
2364
2365 frame->check = slf_check_pool_handler;
2366 frame->data = (void *)coro;
2367}
2368
2369/*****************************************************************************/
2370/* rouse callback */
2371
2372#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2373
2374static void
2375coro_rouse_callback (pTHX_ CV *cv)
2376{
2377 dXSARGS;
2378 SV *data = (SV *)S_GENSUB_ARG;
2379
2380 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2381 {
2382 /* first call, set args */
2383 SV *coro = SvRV (data);
2384 AV *av = newAV ();
2385
2386 SvRV_set (data, (SV *)av);
2387
2388 /* better take a full copy of the arguments */
2389 while (items--)
2390 av_store (av, items, newSVsv (ST (items)));
2391
2392 api_ready (aTHX_ coro);
2393 SvREFCNT_dec (coro);
2394 }
2395
2396 XSRETURN_EMPTY;
2397}
2398
2399static int
2400slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2401{
2402 SV *data = (SV *)frame->data;
2403
2404 if (CORO_THROW)
2405 return 0;
2406
2407 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2408 return 1;
2409
2410 /* now push all results on the stack */
2411 {
2412 dSP;
2413 AV *av = (AV *)SvRV (data);
2414 int i;
2415
2416 EXTEND (SP, AvFILLp (av) + 1);
2417 for (i = 0; i <= AvFILLp (av); ++i)
2418 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2419
2420 /* we have stolen the elements, so set length to zero and free */
2421 AvFILLp (av) = -1;
2422 av_undef (av);
2423
2424 PUTBACK;
2425 }
2426
2427 return 0;
2428}
2429
2430static void
2431slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2432{
2433 SV *cb;
2434
2435 if (items)
2436 cb = arg [0];
2437 else
2438 {
2439 struct coro *coro = SvSTATE_current;
2440
2441 if (!coro->rouse_cb)
2442 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2443
2444 cb = sv_2mortal (coro->rouse_cb);
2445 coro->rouse_cb = 0;
2446 }
2447
2448 if (!SvROK (cb)
2449 || SvTYPE (SvRV (cb)) != SVt_PVCV
2450 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2451 croak ("Coro::rouse_wait called with illegal callback argument,");
2452
2453 {
2454 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2455 SV *data = (SV *)S_GENSUB_ARG;
2456
2457 frame->data = (void *)data;
2458 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2459 frame->check = slf_check_rouse_wait;
2460 }
2461}
2462
2463static SV *
2464coro_new_rouse_cb (pTHX)
2465{
2466 HV *hv = (HV *)SvRV (coro_current);
2467 struct coro *coro = SvSTATE_hv (hv);
2468 SV *data = newRV_inc ((SV *)hv);
2469 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2470
2471 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2472 SvREFCNT_dec (data); /* magicext increases the refcount */
2473
2474 SvREFCNT_dec (coro->rouse_cb);
2475 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2476
2477 return cb;
2478}
2479
2480/*****************************************************************************/
2481/* schedule-like-function opcode (SLF) */
2482
2483static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2484static const CV *slf_cv;
2485static SV **slf_argv;
2486static int slf_argc, slf_arga; /* count, allocated */
2487static I32 slf_ax; /* top of stack, for restore */
2488
2489/* this restores the stack in the case we patched the entersub, to */
2490/* recreate the stack frame as perl will on following calls */
2491/* since entersub cleared the stack */
2492static OP *
2493pp_restore (pTHX)
2494{
2495 int i;
2496 SV **SP = PL_stack_base + slf_ax;
2497
2498 PUSHMARK (SP);
2499
2500 EXTEND (SP, slf_argc + 1);
2501
2502 for (i = 0; i < slf_argc; ++i)
2503 PUSHs (sv_2mortal (slf_argv [i]));
2504
2505 PUSHs ((SV *)CvGV (slf_cv));
2506
2507 RETURNOP (slf_restore.op_first);
2508}
2509
2510static void
2511slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2512{
2513 SV **arg = (SV **)slf_frame.data;
2514
2515 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2516}
2517
2518static void
2519slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2520{
2521 if (items != 2)
2522 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2523
2524 frame->prepare = slf_prepare_transfer;
2525 frame->check = slf_check_nop;
2526 frame->data = (void *)arg; /* let's hope it will stay valid */
2527}
2528
2529static void
2530slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2531{
2532 frame->prepare = prepare_schedule;
2533 frame->check = slf_check_nop;
2534}
2535
2536static void
2537slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2538{
2539 struct coro *next = (struct coro *)slf_frame.data;
2540
2541 SvREFCNT_inc_NN (next->hv);
2542 prepare_schedule_to (aTHX_ ta, next);
2543}
2544
2545static void
2546slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2547{
2548 if (!items)
2549 croak ("Coro::schedule_to expects a coroutine argument, caught");
2550
2551 frame->data = (void *)SvSTATE (arg [0]);
2552 frame->prepare = slf_prepare_schedule_to;
2553 frame->check = slf_check_nop;
2554}
2555
2556static void
2557slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2558{
2559 api_ready (aTHX_ SvRV (coro_current));
2560
2561 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2562}
2563
2564static void
2565slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2566{
2567 frame->prepare = prepare_cede;
2568 frame->check = slf_check_nop;
2569}
2570
2571static void
2572slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2573{
2574 frame->prepare = prepare_cede_notself;
2575 frame->check = slf_check_nop;
2576}
2577
2578/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2579static void
2580slf_destroy (pTHX_ struct coro *coro)
2581{
2582 /* this callback is reserved for slf functions needing to do cleanup */
2583 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2584 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2585
2586 /*
2587 * The on_destroy above most likely is from an SLF call.
2588 * Since by definition the SLF call will not finish when we destroy
2589 * the coro, we will have to force-finish it here, otherwise
2590 * cleanup functions cannot call SLF functions.
2591 */
2592 coro->slf_frame.prepare = 0;
2593}
2594
2595/*
2596 * these not obviously related functions are all rolled into one
2597 * function to increase chances that they all will call transfer with the same
2598 * stack offset
2599 * SLF stands for "schedule-like-function".
2600 */
2601static OP *
2602pp_slf (pTHX)
2603{
2604 I32 checkmark; /* mark SP to see how many elements check has pushed */
2605
2606 /* set up the slf frame, unless it has already been set-up */
2607 /* the latter happens when a new coro has been started */
2608 /* or when a new cctx was attached to an existing coroutine */
2609 if (ecb_expect_true (!slf_frame.prepare))
2610 {
2611 /* first iteration */
2612 dSP;
2613 SV **arg = PL_stack_base + TOPMARK + 1;
2614 int items = SP - arg; /* args without function object */
2615 SV *gv = *sp;
2616
2617 /* do a quick consistency check on the "function" object, and if it isn't */
2618 /* for us, divert to the real entersub */
2619 if (SvTYPE (gv) != SVt_PVGV
2620 || !GvCV (gv)
2621 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2622 return PL_ppaddr[OP_ENTERSUB](aTHX);
2623
2624 if (!(PL_op->op_flags & OPf_STACKED))
2625 {
2626 /* ampersand-form of call, use @_ instead of stack */
2627 AV *av = GvAV (PL_defgv);
2628 arg = AvARRAY (av);
2629 items = AvFILLp (av) + 1;
2630 }
2631
2632 /* now call the init function, which needs to set up slf_frame */
2633 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2634 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2635
2636 /* pop args */
2637 SP = PL_stack_base + POPMARK;
2638
2639 PUTBACK;
2640 }
2641
2642 /* now that we have a slf_frame, interpret it! */
2643 /* we use a callback system not to make the code needlessly */
2644 /* complicated, but so we can run multiple perl coros from one cctx */
2645
2646 do
2647 {
2648 struct coro_transfer_args ta;
2649
2650 slf_frame.prepare (aTHX_ &ta);
2651 TRANSFER (ta, 0);
2652
2653 checkmark = PL_stack_sp - PL_stack_base;
2654 }
2655 while (slf_frame.check (aTHX_ &slf_frame));
2656
2657 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2658
2659 /* exception handling */
2660 if (ecb_expect_false (CORO_THROW))
2661 {
2662 SV *exception = sv_2mortal (CORO_THROW);
2663
2664 CORO_THROW = 0;
2665 sv_setsv (ERRSV, exception);
2666 croak (0);
2667 }
2668
2669 /* return value handling - mostly like entersub */
2670 /* make sure we put something on the stack in scalar context */
2671 if (GIMME_V == G_SCALAR
2672 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2673 {
2674 dSP;
2675 SV **bot = PL_stack_base + checkmark;
2676
2677 if (sp == bot) /* too few, push undef */
2678 bot [1] = &PL_sv_undef;
2679 else /* too many, take last one */
2680 bot [1] = *sp;
2681
2682 SP = bot + 1;
2683
2684 PUTBACK;
2685 }
2686
2687 return NORMAL;
2688}
2689
2690static void
2691api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2692{
2693 int i;
2694 SV **arg = PL_stack_base + ax;
2695 int items = PL_stack_sp - arg + 1;
2696
2697 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2698
2699 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2700 && PL_op->op_ppaddr != pp_slf)
2701 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2702
2703 CvFLAGS (cv) |= CVf_SLF;
2704 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2705 slf_cv = cv;
2706
2707 /* we patch the op, and then re-run the whole call */
2708 /* we have to put the same argument on the stack for this to work */
2709 /* and this will be done by pp_restore */
2710 slf_restore.op_next = (OP *)&slf_restore;
2711 slf_restore.op_type = OP_CUSTOM;
2712 slf_restore.op_ppaddr = pp_restore;
2713 slf_restore.op_first = PL_op;
2714
2715 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2716
2717 if (PL_op->op_flags & OPf_STACKED)
2718 {
2719 if (items > slf_arga)
2720 {
2721 slf_arga = items;
2722 Safefree (slf_argv);
2723 New (0, slf_argv, slf_arga, SV *);
2724 }
2725
2726 slf_argc = items;
2727
2728 for (i = 0; i < items; ++i)
2729 slf_argv [i] = SvREFCNT_inc (arg [i]);
2730 }
2731 else
2732 slf_argc = 0;
2733
2734 PL_op->op_ppaddr = pp_slf;
2735 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2736
2737 PL_op = (OP *)&slf_restore;
2738}
2739
2740/*****************************************************************************/
2741/* dynamic wind */
2742
2743static void
2744on_enterleave_call (pTHX_ SV *cb)
2745{
2746 dSP;
2747
2748 PUSHSTACK;
2749
2750 PUSHMARK (SP);
2751 PUTBACK;
2752 call_sv (cb, G_VOID | G_DISCARD);
2753 SPAGAIN;
2754
2755 POPSTACK;
2756}
2757
2758static SV *
2759coro_avp_pop_and_free (pTHX_ AV **avp)
2760{
2761 AV *av = *avp;
2762 SV *res = av_pop (av);
2763
2764 if (AvFILLp (av) < 0)
2765 {
2766 *avp = 0;
2767 SvREFCNT_dec (av);
2768 }
2769
2770 return res;
2771}
2772
2773static void
2774coro_pop_on_enter (pTHX_ void *coro)
2775{
2776 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2777 SvREFCNT_dec (cb);
2778}
2779
2780static void
2781coro_pop_on_leave (pTHX_ void *coro)
2782{
2783 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2784 on_enterleave_call (aTHX_ sv_2mortal (cb));
2785}
2786
2787/*****************************************************************************/
2788/* PerlIO::cede */
2789
2790typedef struct
2791{
2792 PerlIOBuf base;
2793 NV next, every;
2794} PerlIOCede;
2795
2796static IV ecb_cold
2797PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2798{
2799 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2800
2801 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2802 self->next = nvtime () + self->every;
2803
2804 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2805}
2806
2807static SV * ecb_cold
2808PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2809{
2810 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2811
2812 return newSVnv (self->every);
2813}
2814
2815static IV
2816PerlIOCede_flush (pTHX_ PerlIO *f)
2817{
2818 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2819 double now = nvtime ();
2820
2821 if (now >= self->next)
2822 {
2823 api_cede (aTHX);
2824 self->next = now + self->every;
2825 }
2826
2827 return PerlIOBuf_flush (aTHX_ f);
2828}
2829
2830static PerlIO_funcs PerlIO_cede =
2831{
2832 sizeof(PerlIO_funcs),
2833 "cede",
2834 sizeof(PerlIOCede),
2835 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2836 PerlIOCede_pushed,
2837 PerlIOBuf_popped,
2838 PerlIOBuf_open,
2839 PerlIOBase_binmode,
2840 PerlIOCede_getarg,
2841 PerlIOBase_fileno,
2842 PerlIOBuf_dup,
2843 PerlIOBuf_read,
2844 PerlIOBuf_unread,
2845 PerlIOBuf_write,
2846 PerlIOBuf_seek,
2847 PerlIOBuf_tell,
2848 PerlIOBuf_close,
2849 PerlIOCede_flush,
2850 PerlIOBuf_fill,
2851 PerlIOBase_eof,
2852 PerlIOBase_error,
2853 PerlIOBase_clearerr,
2854 PerlIOBase_setlinebuf,
2855 PerlIOBuf_get_base,
2856 PerlIOBuf_bufsiz,
2857 PerlIOBuf_get_ptr,
2858 PerlIOBuf_get_cnt,
2859 PerlIOBuf_set_ptrcnt,
2860};
2861
2862/*****************************************************************************/
2863/* Coro::Semaphore & Coro::Signal */
2864
2865static SV *
2866coro_waitarray_new (pTHX_ int count)
2867{
2868 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2869 AV *av = newAV ();
2870 SV **ary;
2871
2872 /* unfortunately, building manually saves memory */
2873 Newx (ary, 2, SV *);
2874 AvALLOC (av) = ary;
2875#if PERL_VERSION_ATLEAST (5,10,0)
2876 AvARRAY (av) = ary;
2877#else
2878 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2879 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2880 SvPVX ((SV *)av) = (char *)ary;
2881#endif
2882 AvMAX (av) = 1;
2883 AvFILLp (av) = 0;
2884 ary [0] = newSViv (count);
2885
2886 return newRV_noinc ((SV *)av);
2887}
2888
2889/* semaphore */
2890
2891static void
2892coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2893{
2894 SV *count_sv = AvARRAY (av)[0];
2895 IV count = SvIVX (count_sv);
2896
2897 count += adjust;
2898 SvIVX (count_sv) = count;
2899
2900 /* now wake up as many waiters as are expected to lock */
2901 while (count > 0 && AvFILLp (av) > 0)
2902 {
2903 SV *cb;
2904
2905 /* swap first two elements so we can shift a waiter */
2906 AvARRAY (av)[0] = AvARRAY (av)[1];
2907 AvARRAY (av)[1] = count_sv;
2908 cb = av_shift (av);
2909
2910 if (SvOBJECT (cb))
2911 {
2912 api_ready (aTHX_ cb);
2913 --count;
2914 }
2915 else if (SvTYPE (cb) == SVt_PVCV)
2916 {
2917 dSP;
2918 PUSHMARK (SP);
2919 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2920 PUTBACK;
2921 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2922 }
2923
2924 SvREFCNT_dec (cb);
2925 }
2926}
2927
2928static void
2929coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2930{
2931 /* call $sem->adjust (0) to possibly wake up some other waiters */
2932 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2933}
2934
2935static int
2936slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2937{
2938 AV *av = (AV *)frame->data;
2939 SV *count_sv = AvARRAY (av)[0];
2940 SV *coro_hv = SvRV (coro_current);
2941
2942 /* if we are about to throw, don't actually acquire the lock, just throw */
2943 if (CORO_THROW)
2944 return 0;
2945 else if (SvIVX (count_sv) > 0)
2946 {
2947 frame->destroy = 0;
2948
2949 if (acquire)
2950 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2951 else
2952 coro_semaphore_adjust (aTHX_ av, 0);
2953
2954 return 0;
2955 }
2956 else
2957 {
2958 int i;
2959 /* if we were woken up but can't down, we look through the whole */
2960 /* waiters list and only add us if we aren't in there already */
2961 /* this avoids some degenerate memory usage cases */
2962 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
2963 if (AvARRAY (av)[i] == coro_hv)
2964 return 1;
2965
2966 av_push (av, SvREFCNT_inc (coro_hv));
2967 return 1;
2968 }
2969}
2970
2971static int
2972slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2973{
2974 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2975}
2976
2977static int
2978slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2979{
2980 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2981}
2982
2983static void
2984slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2985{
2986 AV *av = (AV *)SvRV (arg [0]);
2987
2988 if (SvIVX (AvARRAY (av)[0]) > 0)
2989 {
2990 frame->data = (void *)av;
2991 frame->prepare = prepare_nop;
2992 }
2993 else
2994 {
2995 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2996
2997 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2998 frame->prepare = prepare_schedule;
2999 /* to avoid race conditions when a woken-up coro gets terminated */
3000 /* we arrange for a temporary on_destroy that calls adjust (0) */
3001 frame->destroy = coro_semaphore_destroy;
3002 }
3003}
3004
3005static void
3006slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3007{
3008 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3009 frame->check = slf_check_semaphore_down;
3010}
3011
3012static void
3013slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3014{
3015 if (items >= 2)
3016 {
3017 /* callback form */
3018 AV *av = (AV *)SvRV (arg [0]);
3019 SV *cb_cv = s_get_cv_croak (arg [1]);
3020
3021 av_push (av, SvREFCNT_inc_NN (cb_cv));
3022
3023 if (SvIVX (AvARRAY (av)[0]) > 0)
3024 coro_semaphore_adjust (aTHX_ av, 0);
3025
3026 frame->prepare = prepare_nop;
3027 frame->check = slf_check_nop;
3028 }
3029 else
3030 {
3031 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3032 frame->check = slf_check_semaphore_wait;
3033 }
3034}
3035
3036/* signal */
3037
3038static void
3039coro_signal_wake (pTHX_ AV *av, int count)
3040{
3041 SvIVX (AvARRAY (av)[0]) = 0;
3042
3043 /* now signal count waiters */
3044 while (count > 0 && AvFILLp (av) > 0)
3045 {
3046 SV *cb;
3047
3048 /* swap first two elements so we can shift a waiter */
3049 cb = AvARRAY (av)[0];
3050 AvARRAY (av)[0] = AvARRAY (av)[1];
3051 AvARRAY (av)[1] = cb;
3052
3053 cb = av_shift (av);
3054
3055 if (SvTYPE (cb) == SVt_PVCV)
3056 {
3057 dSP;
3058 PUSHMARK (SP);
3059 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3060 PUTBACK;
3061 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3062 }
3063 else
3064 {
3065 api_ready (aTHX_ cb);
3066 sv_setiv (cb, 0); /* signal waiter */
3067 }
3068
3069 SvREFCNT_dec (cb);
3070
3071 --count;
3072 }
3073}
3074
3075static int
3076slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3077{
3078 /* if we are about to throw, also stop waiting */
3079 return SvROK ((SV *)frame->data) && !CORO_THROW;
3080}
3081
3082static void
3083slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3084{
3085 AV *av = (AV *)SvRV (arg [0]);
3086
3087 if (items >= 2)
3088 {
3089 SV *cb_cv = s_get_cv_croak (arg [1]);
3090 av_push (av, SvREFCNT_inc_NN (cb_cv));
3091
3092 if (SvIVX (AvARRAY (av)[0]))
3093 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3094
3095 frame->prepare = prepare_nop;
3096 frame->check = slf_check_nop;
3097 }
3098 else if (SvIVX (AvARRAY (av)[0]))
3099 {
3100 SvIVX (AvARRAY (av)[0]) = 0;
3101 frame->prepare = prepare_nop;
3102 frame->check = slf_check_nop;
3103 }
3104 else
3105 {
3106 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3107
3108 av_push (av, waiter);
3109
3110 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3111 frame->prepare = prepare_schedule;
3112 frame->check = slf_check_signal_wait;
3113 }
3114}
3115
3116/*****************************************************************************/
3117/* Coro::AIO */
3118
3119#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3120
3121/* helper storage struct */
3122struct io_state
3123{
3124 int errorno;
3125 I32 laststype; /* U16 in 5.10.0 */
3126 int laststatval;
3127 Stat_t statcache;
3128};
3129
3130static void
3131coro_aio_callback (pTHX_ CV *cv)
3132{
3133 dXSARGS;
3134 AV *state = (AV *)S_GENSUB_ARG;
3135 SV *coro = av_pop (state);
3136 SV *data_sv = newSV (sizeof (struct io_state));
3137
3138 av_extend (state, items - 1);
3139
3140 sv_upgrade (data_sv, SVt_PV);
3141 SvCUR_set (data_sv, sizeof (struct io_state));
3142 SvPOK_only (data_sv);
3143
3144 {
3145 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3146
3147 data->errorno = errno;
3148 data->laststype = PL_laststype;
3149 data->laststatval = PL_laststatval;
3150 data->statcache = PL_statcache;
3151 }
3152
3153 /* now build the result vector out of all the parameters and the data_sv */
3154 {
3155 int i;
3156
3157 for (i = 0; i < items; ++i)
3158 av_push (state, SvREFCNT_inc_NN (ST (i)));
3159 }
3160
3161 av_push (state, data_sv);
3162
3163 api_ready (aTHX_ coro);
3164 SvREFCNT_dec (coro);
3165 SvREFCNT_dec ((AV *)state);
3166}
3167
3168static int
3169slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3170{
3171 AV *state = (AV *)frame->data;
3172
3173 /* if we are about to throw, return early */
3174 /* this does not cancel the aio request, but at least */
3175 /* it quickly returns */
3176 if (CORO_THROW)
3177 return 0;
3178
3179 /* one element that is an RV? repeat! */
3180 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
3181 return 1;
3182
3183 /* restore status */
3184 {
3185 SV *data_sv = av_pop (state);
3186 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3187
3188 errno = data->errorno;
3189 PL_laststype = data->laststype;
3190 PL_laststatval = data->laststatval;
3191 PL_statcache = data->statcache;
3192
3193 SvREFCNT_dec (data_sv);
3194 }
3195
3196 /* push result values */
3197 {
3198 dSP;
3199 int i;
3200
3201 EXTEND (SP, AvFILLp (state) + 1);
3202 for (i = 0; i <= AvFILLp (state); ++i)
3203 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3204
3205 PUTBACK;
3206 }
3207
3208 return 0;
3209}
3210
3211static void
3212slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3213{
3214 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3215 SV *coro_hv = SvRV (coro_current);
3216 struct coro *coro = SvSTATE_hv (coro_hv);
3217
3218 /* put our coroutine id on the state arg */
3219 av_push (state, SvREFCNT_inc_NN (coro_hv));
3220
3221 /* first see whether we have a non-zero priority and set it as AIO prio */
3222 if (coro->prio)
3223 {
3224 dSP;
3225
3226 static SV *prio_cv;
3227 static SV *prio_sv;
3228
3229 if (ecb_expect_false (!prio_cv))
3230 {
3231 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3232 prio_sv = newSViv (0);
3233 }
3234
3235 PUSHMARK (SP);
3236 sv_setiv (prio_sv, coro->prio);
3237 XPUSHs (prio_sv);
3238
3239 PUTBACK;
3240 call_sv (prio_cv, G_VOID | G_DISCARD);
3241 }
3242
3243 /* now call the original request */
3244 {
3245 dSP;
3246 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3247 int i;
3248
3249 PUSHMARK (SP);
3250
3251 /* first push all args to the stack */
3252 EXTEND (SP, items + 1);
3253
3254 for (i = 0; i < items; ++i)
3255 PUSHs (arg [i]);
3256
3257 /* now push the callback closure */
3258 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3259
3260 /* now call the AIO function - we assume our request is uncancelable */
3261 PUTBACK;
3262 call_sv ((SV *)req, G_VOID | G_DISCARD);
3263 }
3264
3265 /* now that the request is going, we loop till we have a result */
3266 frame->data = (void *)state;
3267 frame->prepare = prepare_schedule;
3268 frame->check = slf_check_aio_req;
3269}
3270
3271static void
3272coro_aio_req_xs (pTHX_ CV *cv)
3273{
3274 dXSARGS;
3275
3276 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3277
3278 XSRETURN_EMPTY;
3279}
3280
3281/*****************************************************************************/
3282
3283#if CORO_CLONE
3284# include "clone.c"
3285#endif
3286
3287/*****************************************************************************/
3288
3289static SV *
3290coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3291{
3292 SV *coro_sv;
3293 struct coro *coro;
3294 MAGIC *mg;
3295 HV *hv;
3296 SV *cb;
3297 int i;
3298
3299 if (argc > 0)
3300 {
3301 cb = s_get_cv_croak (argv [0]);
3302
3303 if (!is_coro)
3304 {
3305 if (CvISXSUB (cb))
3306 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3307
3308 if (!CvROOT (cb))
3309 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3310 }
3311 }
3312
3313 Newz (0, coro, 1, struct coro);
3314 coro->args = newAV ();
3315 coro->flags = CF_NEW;
3316
3317 if (coro_first) coro_first->prev = coro;
3318 coro->next = coro_first;
3319 coro_first = coro;
3320
3321 coro->hv = hv = newHV ();
3322 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3323 mg->mg_flags |= MGf_DUP;
3324 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3325
3326 if (argc > 0)
3327 {
3328 av_extend (coro->args, argc + is_coro - 1);
3329
3330 if (is_coro)
3331 {
3332 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3333 cb = (SV *)cv_coro_run;
3334 }
3335
3336 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3337
3338 for (i = 1; i < argc; i++)
3339 av_push (coro->args, newSVsv (argv [i]));
3340 }
3341
3342 return coro_sv;
3343}
3344
3345#ifndef __cplusplus
3346ecb_cold XS(boot_Coro__State);
3347#endif
3348
3349#if CORO_JIT
3350
3351static void ecb_noinline ecb_cold
3352pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3353{
3354 dSP;
3355 AV *av = newAV ();
3356
3357 av_store (av, 3, newSVuv (d));
3358 av_store (av, 2, newSVuv (c));
3359 av_store (av, 1, newSVuv (b));
3360 av_store (av, 0, newSVuv (a));
3361
3362 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3363
3364 PUTBACK;
3365}
3366
3367static void ecb_noinline ecb_cold
3368jit_init (pTHX)
3369{
3370 dSP;
3371 SV *load, *save;
3372 char *map_base;
3373 char *load_ptr, *save_ptr;
3374 STRLEN load_len, save_len, map_len;
3375 int count;
3376
3377 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3378
3379 PUSHMARK (SP);
3380 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3381 #include "state.h"
3382 count = call_pv ("Coro::State::_jit", G_ARRAY);
3383 SPAGAIN;
3384
3385 save = POPs; save_ptr = SvPVbyte (save, save_len);
3386 load = POPs; load_ptr = SvPVbyte (load, load_len);
3387
3388 map_len = load_len + save_len + 16;
3389
3390 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3391
3392 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3393
3394 load_perl_slots = (load_save_perl_slots_type)map_base;
3395 memcpy (map_base, load_ptr, load_len);
3396
3397 map_base += (load_len + 15) & ~15;
3398
3399 save_perl_slots = (load_save_perl_slots_type)map_base;
3400 memcpy (map_base, save_ptr, save_len);
3401
3402 /* we are good citizens and try to make the page read-only, so the evil evil */
3403 /* hackers might have it a bit more difficult */
3404 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3405
3406 PUTBACK;
3407 eval_pv ("undef &Coro::State::_jit", 1);
3408}
3409
3410#endif
3411
1542MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 3412MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1543 3413
1544PROTOTYPES: DISABLE 3414PROTOTYPES: DISABLE
1545 3415
1546BOOT: 3416BOOT:
1547{ 3417{
1548#ifdef USE_ITHREADS 3418#ifdef USE_ITHREADS
1549 MUTEX_INIT (&coro_mutex); 3419# if CORO_PTHREAD
3420 coro_thx = PERL_GET_CONTEXT;
1550#endif 3421# endif
1551 BOOT_PAGESIZE; 3422#endif
3423 /* perl defines these to check for existance first, but why it doesn't */
3424 /* just create them one at init time is not clear to me, except for */
3425 /* programs trying to delete them, but... */
3426 /* anyway, we declare this as invalid and make sure they are initialised here */
3427 DEFSV;
3428 ERRSV;
3429
3430 cctx_current = cctx_new_empty ();
1552 3431
1553 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 3432 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1554 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 3433 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1555 3434
1556 orig_sigelem_get = PL_vtbl_sigelem.svt_get; 3435 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1557 PL_vtbl_sigelem.svt_get = coro_sigelem_get; 3436 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1558 orig_sigelem_set = PL_vtbl_sigelem.svt_set; 3437 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1559 PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1560 3438
1561 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE); 3439 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1562 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV)); 3440 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1563 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV)); 3441 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1564 3442
… …
1573 main_top_env = PL_top_env; 3451 main_top_env = PL_top_env;
1574 3452
1575 while (main_top_env->je_prev) 3453 while (main_top_env->je_prev)
1576 main_top_env = main_top_env->je_prev; 3454 main_top_env = main_top_env->je_prev;
1577 3455
3456 {
3457 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3458
3459 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3460 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3461
3462 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3463 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3464 }
3465
1578 coroapi.ver = CORO_API_VERSION; 3466 coroapi.ver = CORO_API_VERSION;
1579 coroapi.rev = CORO_API_REVISION; 3467 coroapi.rev = CORO_API_REVISION;
3468
1580 coroapi.transfer = api_transfer; 3469 coroapi.transfer = api_transfer;
1581 3470
3471 coroapi.sv_state = SvSTATE_;
3472 coroapi.execute_slf = api_execute_slf;
3473 coroapi.prepare_nop = prepare_nop;
3474 coroapi.prepare_schedule = prepare_schedule;
3475 coroapi.prepare_cede = prepare_cede;
3476 coroapi.prepare_cede_notself = prepare_cede_notself;
3477
3478 time_init (aTHX);
3479
1582 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3480 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3481#if CORO_JIT
3482 PUTBACK;
3483 jit_init (aTHX);
3484 SPAGAIN;
3485#endif
1583} 3486}
1584 3487
1585SV * 3488SV *
1586new (char *klass, ...) 3489new (SV *klass, ...)
3490 ALIAS:
3491 Coro::new = 1
1587 CODE: 3492 CODE:
1588{ 3493 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1589 struct coro *coro;
1590 MAGIC *mg;
1591 HV *hv;
1592 int i;
1593
1594 Newz (0, coro, 1, struct coro);
1595 coro->args = newAV ();
1596 coro->flags = CF_NEW;
1597
1598 if (coro_first) coro_first->prev = coro;
1599 coro->next = coro_first;
1600 coro_first = coro;
1601
1602 coro->hv = hv = newHV ();
1603 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1604 mg->mg_flags |= MGf_DUP;
1605 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1606
1607 av_extend (coro->args, items - 1);
1608 for (i = 1; i < items; i++)
1609 av_push (coro->args, newSVsv (ST (i)));
1610}
1611 OUTPUT:
1612 RETVAL
1613
1614# these not obviously related functions are all rolled into the same xs
1615# function to increase chances that they all will call transfer with the same
1616# stack offset
1617void
1618_set_stacklevel (...)
1619 ALIAS:
1620 Coro::State::transfer = 1
1621 Coro::schedule = 2
1622 Coro::cede = 3
1623 Coro::cede_notself = 4
1624 CODE:
1625{
1626 struct transfer_args ta;
1627
1628 PUTBACK;
1629 switch (ix)
1630 {
1631 case 0:
1632 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1633 ta.next = 0;
1634 break;
1635
1636 case 1:
1637 if (items != 2)
1638 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1639
1640 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1641 break;
1642
1643 case 2:
1644 prepare_schedule (aTHX_ &ta);
1645 break;
1646
1647 case 3:
1648 prepare_cede (aTHX_ &ta);
1649 break;
1650
1651 case 4:
1652 if (!prepare_cede_notself (aTHX_ &ta))
1653 XSRETURN_EMPTY;
1654
1655 break;
1656 }
1657 SPAGAIN;
1658
1659 BARRIER;
1660 PUTBACK;
1661 TRANSFER (ta);
1662 SPAGAIN; /* might be the sp of a different coroutine now */
1663 /* be extra careful not to ever do anything after TRANSFER */
1664}
1665
1666bool
1667_destroy (SV *coro_sv)
1668 CODE:
1669 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1670 OUTPUT: 3494 OUTPUT:
1671 RETVAL 3495 RETVAL
1672 3496
1673void 3497void
1674_exit (code) 3498transfer (...)
1675 int code
1676 PROTOTYPE: $ 3499 PROTOTYPE: $$
1677 CODE: 3500 CODE:
1678 _exit (code); 3501 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3502
3503SV *
3504clone (Coro::State coro)
3505 CODE:
3506{
3507#if CORO_CLONE
3508 struct coro *ncoro = coro_clone (aTHX_ coro);
3509 MAGIC *mg;
3510 /* TODO: too much duplication */
3511 ncoro->hv = newHV ();
3512 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3513 mg->mg_flags |= MGf_DUP;
3514 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3515#else
3516 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3517#endif
3518}
3519 OUTPUT:
3520 RETVAL
1679 3521
1680int 3522int
1681cctx_stacksize (int new_stacksize = 0) 3523cctx_stacksize (int new_stacksize = 0)
3524 PROTOTYPE: ;$
1682 CODE: 3525 CODE:
1683 RETVAL = coro_stacksize; 3526 RETVAL = cctx_stacksize;
1684 if (new_stacksize) 3527 if (new_stacksize)
3528 {
1685 coro_stacksize = new_stacksize; 3529 cctx_stacksize = new_stacksize;
3530 ++cctx_gen;
3531 }
1686 OUTPUT: 3532 OUTPUT:
1687 RETVAL 3533 RETVAL
1688 3534
1689int 3535int
3536cctx_max_idle (int max_idle = 0)
3537 PROTOTYPE: ;$
3538 CODE:
3539 RETVAL = cctx_max_idle;
3540 if (max_idle > 1)
3541 cctx_max_idle = max_idle;
3542 OUTPUT:
3543 RETVAL
3544
3545int
1690cctx_count () 3546cctx_count ()
3547 PROTOTYPE:
1691 CODE: 3548 CODE:
1692 RETVAL = cctx_count; 3549 RETVAL = cctx_count;
1693 OUTPUT: 3550 OUTPUT:
1694 RETVAL 3551 RETVAL
1695 3552
1696int 3553int
1697cctx_idle () 3554cctx_idle ()
3555 PROTOTYPE:
1698 CODE: 3556 CODE:
1699 RETVAL = cctx_idle; 3557 RETVAL = cctx_idle;
1700 OUTPUT: 3558 OUTPUT:
1701 RETVAL 3559 RETVAL
1702 3560
1703void 3561void
1704list () 3562list ()
3563 PROTOTYPE:
1705 PPCODE: 3564 PPCODE:
1706{ 3565{
1707 struct coro *coro; 3566 struct coro *coro;
1708 for (coro = coro_first; coro; coro = coro->next) 3567 for (coro = coro_first; coro; coro = coro->next)
1709 if (coro->hv) 3568 if (coro->hv)
1710 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv))); 3569 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1711} 3570}
1712 3571
… …
1714call (Coro::State coro, SV *coderef) 3573call (Coro::State coro, SV *coderef)
1715 ALIAS: 3574 ALIAS:
1716 eval = 1 3575 eval = 1
1717 CODE: 3576 CODE:
1718{ 3577{
1719 if (coro->mainstack) 3578 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1720 { 3579 {
1721 struct coro temp; 3580 struct coro *current = SvSTATE_current;
3581 struct CoroSLF slf_save;
1722 3582
1723 if (!(coro->flags & CF_RUNNING)) 3583 if (current != coro)
1724 { 3584 {
1725 PUTBACK; 3585 PUTBACK;
1726 save_perl (aTHX_ &temp); 3586 save_perl (aTHX_ current);
1727 load_perl (aTHX_ coro); 3587 load_perl (aTHX_ coro);
3588 /* the coro is most likely in an active SLF call.
3589 * while not strictly required (the code we execute is
3590 * not allowed to call any SLF functions), it's cleaner
3591 * to reinitialise the slf_frame and restore it later.
3592 * This might one day allow us to actually do SLF calls
3593 * from code executed here.
3594 */
3595 slf_save = slf_frame;
3596 slf_frame.prepare = 0;
3597 SPAGAIN;
1728 } 3598 }
1729 3599
1730 {
1731 dSP;
1732 ENTER;
1733 SAVETMPS;
1734 PUTBACK;
1735 PUSHSTACK; 3600 PUSHSTACK;
3601
1736 PUSHMARK (SP); 3602 PUSHMARK (SP);
3603 PUTBACK;
1737 3604
1738 if (ix) 3605 if (ix)
1739 eval_sv (coderef, 0); 3606 eval_sv (coderef, 0);
1740 else 3607 else
1741 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3608 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1742 3609
1743 POPSTACK; 3610 POPSTACK;
1744 SPAGAIN; 3611 SPAGAIN;
1745 FREETMPS;
1746 LEAVE;
1747 PUTBACK;
1748 }
1749 3612
1750 if (!(coro->flags & CF_RUNNING)) 3613 if (current != coro)
1751 { 3614 {
3615 PUTBACK;
3616 slf_frame = slf_save;
1752 save_perl (aTHX_ coro); 3617 save_perl (aTHX_ coro);
1753 load_perl (aTHX_ &temp); 3618 load_perl (aTHX_ current);
1754 SPAGAIN; 3619 SPAGAIN;
1755 } 3620 }
1756 } 3621 }
1757} 3622}
1758 3623
… …
1761 PROTOTYPE: $ 3626 PROTOTYPE: $
1762 ALIAS: 3627 ALIAS:
1763 is_ready = CF_READY 3628 is_ready = CF_READY
1764 is_running = CF_RUNNING 3629 is_running = CF_RUNNING
1765 is_new = CF_NEW 3630 is_new = CF_NEW
1766 is_destroyed = CF_DESTROYED 3631 is_destroyed = CF_ZOMBIE
3632 is_zombie = CF_ZOMBIE
3633 is_suspended = CF_SUSPENDED
1767 CODE: 3634 CODE:
1768 RETVAL = boolSV (coro->flags & ix); 3635 RETVAL = boolSV (coro->flags & ix);
1769 OUTPUT: 3636 OUTPUT:
1770 RETVAL 3637 RETVAL
1771 3638
1772void 3639void
3640throw (SV *self, SV *exception = &PL_sv_undef)
3641 PROTOTYPE: $;$
3642 CODE:
3643{
3644 struct coro *coro = SvSTATE (self);
3645 struct coro *current = SvSTATE_current;
3646 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3647 SvREFCNT_dec (*exceptionp);
3648 SvGETMAGIC (exception);
3649 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3650
3651 api_ready (aTHX_ self);
3652}
3653
3654void
1773api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3655api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3656 PROTOTYPE: $;$
3657 C_ARGS: aTHX_ coro, flags
1774 3658
1775SV * 3659SV *
1776has_stack (Coro::State coro) 3660has_cctx (Coro::State coro)
1777 PROTOTYPE: $ 3661 PROTOTYPE: $
1778 CODE: 3662 CODE:
1779 RETVAL = boolSV (!!coro->cctx); 3663 /* maybe manage the running flag differently */
3664 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1780 OUTPUT: 3665 OUTPUT:
1781 RETVAL 3666 RETVAL
1782 3667
1783int 3668int
1784is_traced (Coro::State coro) 3669is_traced (Coro::State coro)
… …
1786 CODE: 3671 CODE:
1787 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3672 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1788 OUTPUT: 3673 OUTPUT:
1789 RETVAL 3674 RETVAL
1790 3675
1791IV 3676UV
1792rss (Coro::State coro) 3677rss (Coro::State coro)
1793 PROTOTYPE: $ 3678 PROTOTYPE: $
1794 ALIAS: 3679 ALIAS:
1795 usecount = 1 3680 usecount = 1
1796 CODE: 3681 CODE:
… …
1800 case 1: RETVAL = coro->usecount; break; 3685 case 1: RETVAL = coro->usecount; break;
1801 } 3686 }
1802 OUTPUT: 3687 OUTPUT:
1803 RETVAL 3688 RETVAL
1804 3689
3690void
3691force_cctx ()
3692 PROTOTYPE:
3693 CODE:
3694 cctx_current->idle_sp = 0;
3695
3696void
3697swap_defsv (Coro::State self)
3698 PROTOTYPE: $
3699 ALIAS:
3700 swap_defav = 1
3701 CODE:
3702 if (!self->slot)
3703 croak ("cannot swap state with coroutine that has no saved state,");
3704 else
3705 {
3706 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3707 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3708
3709 SV *tmp = *src; *src = *dst; *dst = tmp;
3710 }
3711
3712void
3713cancel (Coro::State self)
3714 CODE:
3715 coro_state_destroy (aTHX_ self);
3716
3717SV *
3718enable_times (int enabled = enable_times)
3719 CODE:
3720{
3721 RETVAL = boolSV (enable_times);
3722
3723 if (enabled != enable_times)
3724 {
3725 enable_times = enabled;
3726
3727 coro_times_update ();
3728 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3729 }
3730}
3731 OUTPUT:
3732 RETVAL
3733
3734void
3735times (Coro::State self)
3736 PPCODE:
3737{
3738 struct coro *current = SvSTATE (coro_current);
3739
3740 if (ecb_expect_false (current == self))
3741 {
3742 coro_times_update ();
3743 coro_times_add (SvSTATE (coro_current));
3744 }
3745
3746 EXTEND (SP, 2);
3747 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3748 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3749
3750 if (ecb_expect_false (current == self))
3751 coro_times_sub (SvSTATE (coro_current));
3752}
3753
3754void
3755swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3756 CODE:
3757{
3758 struct coro *current = SvSTATE_current;
3759
3760 if (current == coro)
3761 SWAP_SVS (current);
3762
3763 if (!coro->swap_sv)
3764 coro->swap_sv = newAV ();
3765
3766 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3767 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3768
3769 if (current == coro)
3770 SWAP_SVS (current);
3771}
3772
1805 3773
1806MODULE = Coro::State PACKAGE = Coro 3774MODULE = Coro::State PACKAGE = Coro
1807 3775
1808BOOT: 3776BOOT:
1809{ 3777{
1810 int i;
1811
1812 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE); 3778 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1813 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); 3779 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3780 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3781 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1814 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE); 3782 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3783 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3784 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3785 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1815 3786
1816 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE); 3787 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1817 SvREADONLY_on (coro_current); 3788 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3789 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3790 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
1818 3791
1819 coro_stash = gv_stashpv ("Coro", TRUE); 3792 coro_stash = gv_stashpv ("Coro", TRUE);
1820 3793
1821 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3794 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1822 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3795 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1823 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3796 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1824 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3797 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1825 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3798 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1826 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3799 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1827
1828 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1829 coro_ready[i] = newAV ();
1830 3800
1831 { 3801 {
1832 SV *sv = perl_get_sv ("Coro::API", TRUE); 3802 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1833 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1834 3803
1835 coroapi.schedule = api_schedule; 3804 coroapi.schedule = api_schedule;
3805 coroapi.schedule_to = api_schedule_to;
1836 coroapi.cede = api_cede; 3806 coroapi.cede = api_cede;
1837 coroapi.cede_notself = api_cede_notself; 3807 coroapi.cede_notself = api_cede_notself;
1838 coroapi.ready = api_ready; 3808 coroapi.ready = api_ready;
1839 coroapi.is_ready = api_is_ready; 3809 coroapi.is_ready = api_is_ready;
1840 coroapi.nready = &coro_nready; 3810 coroapi.nready = coro_nready;
1841 coroapi.current = coro_current; 3811 coroapi.current = coro_current;
1842 3812
1843 GCoroAPI = &coroapi; 3813 /*GCoroAPI = &coroapi;*/
1844 sv_setiv (sv, (IV)&coroapi); 3814 sv_setiv (sv, (IV)&coroapi);
1845 SvREADONLY_on (sv); 3815 SvREADONLY_on (sv);
1846 } 3816 }
1847} 3817}
3818
3819SV *
3820async (...)
3821 PROTOTYPE: &@
3822 CODE:
3823 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3824 api_ready (aTHX_ RETVAL);
3825 OUTPUT:
3826 RETVAL
3827
3828void
3829_destroy (Coro::State coro)
3830 CODE:
3831 /* used by the manager thread */
3832 coro_state_destroy (aTHX_ coro);
3833
3834void
3835on_destroy (Coro::State coro, SV *cb)
3836 CODE:
3837 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3838
3839void
3840join (...)
3841 CODE:
3842 CORO_EXECUTE_SLF_XS (slf_init_join);
3843
3844void
3845terminate (...)
3846 CODE:
3847 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3848
3849void
3850cancel (...)
3851 CODE:
3852 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3853
3854int
3855safe_cancel (Coro::State self, ...)
3856 C_ARGS: aTHX_ self, &ST (1), items - 1
3857
3858void
3859schedule (...)
3860 CODE:
3861 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3862
3863void
3864schedule_to (...)
3865 CODE:
3866 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3867
3868void
3869cede_to (...)
3870 CODE:
3871 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3872
3873void
3874cede (...)
3875 CODE:
3876 CORO_EXECUTE_SLF_XS (slf_init_cede);
3877
3878void
3879cede_notself (...)
3880 CODE:
3881 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1848 3882
1849void 3883void
1850_set_current (SV *current) 3884_set_current (SV *current)
1851 PROTOTYPE: $ 3885 PROTOTYPE: $
1852 CODE: 3886 CODE:
1853 SvREFCNT_dec (SvRV (coro_current)); 3887 SvREFCNT_dec (SvRV (coro_current));
1854 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3888 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3889
3890void
3891_set_readyhook (SV *hook)
3892 PROTOTYPE: $
3893 CODE:
3894 SvREFCNT_dec (coro_readyhook);
3895 SvGETMAGIC (hook);
3896 if (SvOK (hook))
3897 {
3898 coro_readyhook = newSVsv (hook);
3899 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3900 }
3901 else
3902 {
3903 coro_readyhook = 0;
3904 CORO_READYHOOK = 0;
3905 }
1855 3906
1856int 3907int
1857prio (Coro::State coro, int newprio = 0) 3908prio (Coro::State coro, int newprio = 0)
3909 PROTOTYPE: $;$
1858 ALIAS: 3910 ALIAS:
1859 nice = 1 3911 nice = 1
1860 CODE: 3912 CODE:
1861{ 3913{
1862 RETVAL = coro->prio; 3914 RETVAL = coro->prio;
… …
1864 if (items > 1) 3916 if (items > 1)
1865 { 3917 {
1866 if (ix) 3918 if (ix)
1867 newprio = coro->prio - newprio; 3919 newprio = coro->prio - newprio;
1868 3920
1869 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3921 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1870 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3922 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1871 3923
1872 coro->prio = newprio; 3924 coro->prio = newprio;
1873 } 3925 }
1874} 3926}
1875 OUTPUT: 3927 OUTPUT:
… …
1877 3929
1878SV * 3930SV *
1879ready (SV *self) 3931ready (SV *self)
1880 PROTOTYPE: $ 3932 PROTOTYPE: $
1881 CODE: 3933 CODE:
1882 RETVAL = boolSV (api_ready (self)); 3934 RETVAL = boolSV (api_ready (aTHX_ self));
1883 OUTPUT: 3935 OUTPUT:
1884 RETVAL 3936 RETVAL
1885 3937
1886int 3938int
1887nready (...) 3939nready (...)
… …
1890 RETVAL = coro_nready; 3942 RETVAL = coro_nready;
1891 OUTPUT: 3943 OUTPUT:
1892 RETVAL 3944 RETVAL
1893 3945
1894void 3946void
1895throw (Coro::State self, SV *throw = &PL_sv_undef) 3947suspend (Coro::State self)
1896 PROTOTYPE: $;$ 3948 PROTOTYPE: $
1897 CODE: 3949 CODE:
1898 SvREFCNT_dec (self->throw); 3950 self->flags |= CF_SUSPENDED;
1899 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1900 3951
1901# for async_pool speedup
1902void 3952void
1903_pool_1 (SV *cb) 3953resume (Coro::State self)
3954 PROTOTYPE: $
1904 CODE: 3955 CODE:
1905{ 3956 self->flags &= ~CF_SUSPENDED;
1906 struct coro *coro = SvSTATE (coro_current);
1907 HV *hv = (HV *)SvRV (coro_current);
1908 AV *defav = GvAV (PL_defgv);
1909 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1910 AV *invoke_av;
1911 int i, len;
1912 3957
1913 if (!invoke) 3958void
3959_pool_handler (...)
3960 CODE:
3961 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3962
3963void
3964async_pool (SV *cv, ...)
3965 PROTOTYPE: &@
3966 PPCODE:
3967{
3968 HV *hv = (HV *)av_pop (av_async_pool);
3969 AV *av = newAV ();
3970 SV *cb = ST (0);
3971 int i;
3972
3973 av_extend (av, items - 2);
3974 for (i = 1; i < items; ++i)
3975 av_push (av, SvREFCNT_inc_NN (ST (i)));
3976
3977 if ((SV *)hv == &PL_sv_undef)
1914 { 3978 {
1915 SvREFCNT_dec (PL_diehook); PL_diehook = 0; 3979 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
1916 croak ("\3async_pool terminate\2\n"); 3980 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3981 SvREFCNT_dec (sv);
1917 } 3982 }
1918 3983
1919 SvREFCNT_dec (coro->saved_deffh);
1920 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
1921
1922 hv_store (hv, "desc", sizeof ("desc") - 1,
1923 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1924
1925 invoke_av = (AV *)SvRV (invoke);
1926 len = av_len (invoke_av);
1927
1928 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1929
1930 if (len > 0)
1931 { 3984 {
1932 av_fill (defav, len - 1); 3985 struct coro *coro = SvSTATE_hv (hv);
1933 for (i = 0; i < len; ++i) 3986
1934 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 3987 assert (!coro->invoke_cb);
3988 assert (!coro->invoke_av);
3989 coro->invoke_cb = SvREFCNT_inc (cb);
3990 coro->invoke_av = av;
1935 } 3991 }
1936 3992
3993 api_ready (aTHX_ (SV *)hv);
3994
3995 if (GIMME_V != G_VOID)
3996 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3997 else
1937 SvREFCNT_dec (invoke); 3998 SvREFCNT_dec (hv);
1938} 3999}
1939 4000
1940void 4001SV *
1941_pool_2 (SV *cb) 4002rouse_cb ()
4003 PROTOTYPE:
1942 CODE: 4004 CODE:
1943{ 4005 RETVAL = coro_new_rouse_cb (aTHX);
1944 struct coro *coro = SvSTATE (coro_current);
1945
1946 sv_setsv (cb, &PL_sv_undef);
1947
1948 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1949 coro->saved_deffh = 0;
1950
1951 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1952 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1953 {
1954 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
1955 croak ("\3async_pool terminate\2\n");
1956 }
1957
1958 av_clear (GvAV (PL_defgv));
1959 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1960 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1961
1962 coro->prio = 0;
1963
1964 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1965 api_trace (coro_current, 0);
1966
1967 av_push (av_async_pool, newSVsv (coro_current));
1968}
1969
1970
1971MODULE = Coro::State PACKAGE = Coro::AIO
1972
1973SV *
1974_get_state ()
1975 CODE:
1976{
1977 struct io_state *data;
1978
1979 RETVAL = newSV (sizeof (struct io_state));
1980 data = (struct io_state *)SvPVX (RETVAL);
1981 SvCUR_set (RETVAL, sizeof (struct io_state));
1982 SvPOK_only (RETVAL);
1983
1984 data->errorno = errno;
1985 data->laststype = PL_laststype;
1986 data->laststatval = PL_laststatval;
1987 data->statcache = PL_statcache;
1988}
1989 OUTPUT: 4006 OUTPUT:
1990 RETVAL 4007 RETVAL
1991 4008
1992void 4009void
1993_set_state (char *data_) 4010rouse_wait (...)
4011 PROTOTYPE: ;$
4012 PPCODE:
4013 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4014
4015void
4016on_enter (SV *block)
4017 ALIAS:
4018 on_leave = 1
1994 PROTOTYPE: $ 4019 PROTOTYPE: &
1995 CODE: 4020 CODE:
1996{ 4021{
1997 struct io_state *data = (void *)data_; 4022 struct coro *coro = SvSTATE_current;
4023 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1998 4024
1999 errno = data->errorno; 4025 block = s_get_cv_croak (block);
2000 PL_laststype = data->laststype;
2001 PL_laststatval = data->laststatval;
2002 PL_statcache = data->statcache;
2003}
2004 4026
4027 if (!*avp)
4028 *avp = newAV ();
4029
4030 av_push (*avp, SvREFCNT_inc (block));
4031
4032 if (!ix)
4033 on_enterleave_call (aTHX_ block);
4034
4035 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4036 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4037 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4038}
4039
4040
4041MODULE = Coro::State PACKAGE = PerlIO::cede
4042
4043BOOT:
4044 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4045
4046
4047MODULE = Coro::State PACKAGE = Coro::Semaphore
4048
4049SV *
4050new (SV *klass, SV *count = 0)
4051 CODE:
4052{
4053 int semcnt = 1;
4054
4055 if (count)
4056 {
4057 SvGETMAGIC (count);
4058
4059 if (SvOK (count))
4060 semcnt = SvIV (count);
4061 }
4062
4063 RETVAL = sv_bless (
4064 coro_waitarray_new (aTHX_ semcnt),
4065 GvSTASH (CvGV (cv))
4066 );
4067}
4068 OUTPUT:
4069 RETVAL
4070
4071# helper for Coro::Channel and others
4072SV *
4073_alloc (int count)
4074 CODE:
4075 RETVAL = coro_waitarray_new (aTHX_ count);
4076 OUTPUT:
4077 RETVAL
4078
4079SV *
4080count (SV *self)
4081 CODE:
4082 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4083 OUTPUT:
4084 RETVAL
4085
4086void
4087up (SV *self, int adjust = 1)
4088 ALIAS:
4089 adjust = 1
4090 CODE:
4091 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4092
4093void
4094down (...)
4095 CODE:
4096 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4097
4098void
4099wait (...)
4100 CODE:
4101 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4102
4103void
4104try (SV *self)
4105 PPCODE:
4106{
4107 AV *av = (AV *)SvRV (self);
4108 SV *count_sv = AvARRAY (av)[0];
4109 IV count = SvIVX (count_sv);
4110
4111 if (count > 0)
4112 {
4113 --count;
4114 SvIVX (count_sv) = count;
4115 XSRETURN_YES;
4116 }
4117 else
4118 XSRETURN_NO;
4119}
4120
4121void
4122waiters (SV *self)
4123 PPCODE:
4124{
4125 AV *av = (AV *)SvRV (self);
4126 int wcount = AvFILLp (av) + 1 - 1;
4127
4128 if (GIMME_V == G_SCALAR)
4129 XPUSHs (sv_2mortal (newSViv (wcount)));
4130 else
4131 {
4132 int i;
4133 EXTEND (SP, wcount);
4134 for (i = 1; i <= wcount; ++i)
4135 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4136 }
4137}
4138
4139MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4140
4141void
4142_may_delete (SV *sem, int count, unsigned int extra_refs)
4143 PPCODE:
4144{
4145 AV *av = (AV *)SvRV (sem);
4146
4147 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4148 && AvFILLp (av) == 0 /* no waiters, just count */
4149 && SvIV (AvARRAY (av)[0]) == count)
4150 XSRETURN_YES;
4151
4152 XSRETURN_NO;
4153}
4154
4155MODULE = Coro::State PACKAGE = Coro::Signal
4156
4157SV *
4158new (SV *klass)
4159 CODE:
4160 RETVAL = sv_bless (
4161 coro_waitarray_new (aTHX_ 0),
4162 GvSTASH (CvGV (cv))
4163 );
4164 OUTPUT:
4165 RETVAL
4166
4167void
4168wait (...)
4169 CODE:
4170 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4171
4172void
4173broadcast (SV *self)
4174 CODE:
4175{
4176 AV *av = (AV *)SvRV (self);
4177 coro_signal_wake (aTHX_ av, AvFILLp (av));
4178}
4179
4180void
4181send (SV *self)
4182 CODE:
4183{
4184 AV *av = (AV *)SvRV (self);
4185
4186 if (AvFILLp (av))
4187 coro_signal_wake (aTHX_ av, 1);
4188 else
4189 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4190}
4191
4192IV
4193awaited (SV *self)
4194 CODE:
4195 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4196 OUTPUT:
4197 RETVAL
4198
4199
4200MODULE = Coro::State PACKAGE = Coro::AnyEvent
4201
4202BOOT:
4203 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4204
4205void
4206_schedule (...)
4207 CODE:
4208{
4209 static int incede;
4210
4211 api_cede_notself (aTHX);
4212
4213 ++incede;
4214 while (coro_nready >= incede && api_cede (aTHX))
4215 ;
4216
4217 sv_setsv (sv_activity, &PL_sv_undef);
4218 if (coro_nready >= incede)
4219 {
4220 PUSHMARK (SP);
4221 PUTBACK;
4222 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4223 }
4224
4225 --incede;
4226}
4227
4228
4229MODULE = Coro::State PACKAGE = Coro::AIO
4230
4231void
4232_register (char *target, char *proto, SV *req)
4233 CODE:
4234{
4235 SV *req_cv = s_get_cv_croak (req);
4236 /* newXSproto doesn't return the CV on 5.8 */
4237 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4238 sv_setpv ((SV *)slf_cv, proto);
4239 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4240}
4241
4242MODULE = Coro::State PACKAGE = Coro::Select
4243
4244void
4245patch_pp_sselect ()
4246 CODE:
4247 if (!coro_old_pp_sselect)
4248 {
4249 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4250 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4251 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4252 }
4253
4254void
4255unpatch_pp_sselect ()
4256 CODE:
4257 if (coro_old_pp_sselect)
4258 {
4259 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4260 coro_old_pp_sselect = 0;
4261 }
4262
4263MODULE = Coro::State PACKAGE = Coro::Util
4264
4265void
4266_exit (int code)
4267 CODE:
4268 _exit (code);
4269
4270NV
4271time ()
4272 CODE:
4273 RETVAL = nvtime (aTHX);
4274 OUTPUT:
4275 RETVAL
4276
4277NV
4278gettimeofday ()
4279 PPCODE:
4280{
4281 UV tv [2];
4282 u2time (aTHX_ tv);
4283 EXTEND (SP, 2);
4284 PUSHs (sv_2mortal (newSVuv (tv [0])));
4285 PUSHs (sv_2mortal (newSVuv (tv [1])));
4286}
4287

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