--- Coro/Coro/State.xs 2006/11/30 20:54:24 1.113 +++ Coro/Coro/State.xs 2016/06/22 20:37:27 1.463 @@ -1,319 +1,854 @@ +/* this works around a bug in mingw32 providing a non-working setjmp */ +#define USE_NO_MINGW_SETJMP_TWO_ARGS + +#define NDEBUG 1 /* perl usually disables NDEBUG later */ + #include "libcoro/coro.c" +#define PERL_NO_GET_CONTEXT +#define PERL_EXT + #include "EXTERN.h" #include "perl.h" #include "XSUB.h" +#include "perliol.h" -#include "patchlevel.h" +#include "schmorp.h" -#if USE_VALGRIND -# include -#endif - -#define PERL_VERSION_ATLEAST(a,b,c) \ - (PERL_REVISION > (a) \ - || (PERL_REVISION == (a) \ - && (PERL_VERSION > (b) \ - || (PERL_VERSION == (b) && PERLSUBVERSION >= (c))))) - -#if !PERL_VERSION_ATLEAST (5,6,0) -# ifndef PL_ppaddr -# define PL_ppaddr ppaddr -# endif -# ifndef call_sv -# define call_sv perl_call_sv -# endif -# ifndef get_sv -# define get_sv perl_get_sv -# endif -# ifndef get_cv -# define get_cv perl_get_cv -# endif -# ifndef IS_PADGV -# define IS_PADGV(v) 0 -# endif -# ifndef IS_PADCONST -# define IS_PADCONST(v) 0 -# endif -#endif +#define ECB_NO_THREADS 1 +#define ECB_NO_LIBM 1 +#include "ecb.h" +#include #include #include +#include -#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 -# undef STACKGUARD +#ifndef SvREFCNT_dec_NN + #define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv) #endif -#ifndef STACKGUARD -# define STACKGUARD 0 +#ifndef SvREFCNT_inc_NN + #define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv) #endif -#ifdef HAVE_MMAP -# include -# include -# ifndef MAP_ANONYMOUS -# ifdef MAP_ANON -# define MAP_ANONYMOUS MAP_ANON -# else -# undef HAVE_MMAP -# endif -# endif -# include -# ifndef PAGESIZE -# define PAGESIZE pagesize -# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) -static long pagesize; -# else -# define BOOT_PAGESIZE (void)0 +#ifndef SVs_PADSTALE +# define SVs_PADSTALE 0 +#endif + +#ifdef PadARRAY +# define NEWPADAPI 1 +# define newPADLIST(var) (Newz (0, var, 1, PADLIST), Newx (PadlistARRAY (var), 2, PAD *)) +#else +typedef AV PADNAMELIST; +# if !PERL_VERSION_ATLEAST(5,8,0) +typedef AV PADLIST; +typedef AV PAD; # endif +# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl)) +# define PadlistMAX(pl) AvFILLp (pl) +# define PadlistNAMES(pl) (*PadlistARRAY (pl)) +# define PadARRAY AvARRAY +# define PadMAX AvFILLp +# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1)) +#endif +#ifndef PadnamelistREFCNT +# define PadnamelistREFCNT(pnl) SvREFCNT (pnl) +#endif +#ifndef PadnamelistREFCNT_dec +# define PadnamelistREFCNT_dec(pnl) SvREFCNT_dec (pnl) +#endif + +/* 5.19.something has replaced SVt_BIND by SVt_INVLIST */ +/* we just alias it to SVt_IV, as that is sufficient for swap_sv for now */ +#if PERL_VERSION_ATLEAST(5,19,0) +# define SVt_BIND SVt_IV +#endif + +#if defined(_WIN32) +# undef HAS_GETTIMEOFDAY +# undef setjmp +# undef longjmp +# undef _exit +# define setjmp _setjmp /* deep magic */ #else -# define PAGESIZE 0 -# define BOOT_PAGESIZE (void)0 +# include /* most portable stdint.h */ #endif -/* The next macro should declare a variable stacklevel that contains and approximation - * to the current C stack pointer. Its property is that it changes with each call - * and should be unique. */ -#define dSTACKLEVEL int stacklevel -#define STACKLEVEL ((void *)&stacklevel) +/* the maximum number of idle cctx that will be pooled */ +static int cctx_max_idle = 4; -#define IN_DESTRUCT (PL_main_cv == Nullcv) +#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0) +# define HAS_SCOPESTACK_NAME 1 +#endif + +/* prefer perl internal functions over our own? */ +#ifndef CORO_PREFER_PERL_FUNCTIONS +# define CORO_PREFER_PERL_FUNCTIONS 0 +#endif -#if __GNUC__ >= 3 -# define attribute(x) __attribute__(x) +/* The next macros try to return the current stack pointer, in an as + * portable way as possible. */ +#if __GNUC__ >= 4 +# define dSTACKLEVEL int stacklevel_dummy +# define STACKLEVEL __builtin_frame_address (0) #else -# define attribute(x) +# define dSTACKLEVEL volatile void *stacklevel +# define STACKLEVEL ((void *)&stacklevel) #endif -#define NOINLINE attribute ((noinline)) +#define IN_DESTRUCT PL_dirty #include "CoroAPI.h" - -#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */ +#define GCoroAPI (&coroapi) /* very sneaky */ #ifdef USE_ITHREADS -static perl_mutex coro_mutex; -# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) -# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) -#else -# define LOCK (void)0 -# define UNLOCK (void)0 +# if CORO_PTHREAD +static void *coro_thx; +# endif #endif +#ifdef __linux +# include /* for timespec */ +# include /* for SYS_* */ +# ifdef SYS_clock_gettime +# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) +# define CORO_CLOCK_MONOTONIC 1 +# define CORO_CLOCK_THREAD_CPUTIME_ID 3 +# endif +#endif + +static double (*nvtime)(); /* so why doesn't it take void? */ +static void (*u2time)(pTHX_ UV ret[2]); + +/* we hijack an hopefully unused CV flag for our purposes */ +#define CVf_SLF 0x4000 +static OP *pp_slf (pTHX); +static void slf_destroy (pTHX_ struct coro *coro); + +static U32 cctx_gen; +static size_t cctx_stacksize = CORO_STACKSIZE; static struct CoroAPI coroapi; static AV *main_mainstack; /* used to differentiate between $main and others */ +static JMPENV *main_top_env; static HV *coro_state_stash, *coro_stash; -static SV *coro_mortal; /* will be freed after next transfer */ +static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */ + +static AV *av_destroy; /* destruction queue */ +static SV *sv_manager; /* the manager coro */ +static SV *sv_idle; /* $Coro::idle */ + +static GV *irsgv; /* $/ */ +static GV *stdoutgv; /* *STDOUT */ +static SV *rv_diehook; +static SV *rv_warnhook; + +/* async_pool helper stuff */ +static SV *sv_pool_rss; +static SV *sv_pool_size; +static SV *sv_async_pool_idle; /* description string */ +static AV *av_async_pool; /* idle pool */ +static SV *sv_Coro; /* class string */ +static CV *cv_pool_handler; + +/* Coro::AnyEvent */ +static SV *sv_activity; + +/* enable processtime/realtime profiling */ +static char enable_times; +typedef U32 coro_ts[2]; +static coro_ts time_real, time_cpu; +static char times_valid; static struct coro_cctx *cctx_first; static int cctx_count, cctx_idle; +enum +{ + CC_MAPPED = 0x01, + CC_NOREUSE = 0x02, /* throw this away after tracing */ + CC_TRACE = 0x04, + CC_TRACE_SUB = 0x08, /* trace sub calls */ + CC_TRACE_LINE = 0x10, /* trace each statement */ + CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, +}; + /* this is a structure representing a c-level coroutine */ -typedef struct coro_cctx { +typedef struct coro_cctx +{ struct coro_cctx *next; /* the stack */ - void *sptr; - long ssize; /* positive == mmap, otherwise malloc */ + struct coro_stack stack; /* cpu state */ - void *idle_sp; /* sp of top-level transfer/schedule/cede call */ + void *idle_sp; /* sp of top-level transfer/schedule/cede call */ +#ifndef NDEBUG + JMPENV *idle_te; /* same as idle_sp, but for top_env */ +#endif JMPENV *top_env; coro_context cctx; - int inuse; - -#if USE_VALGRIND + U32 gen; +#if CORO_USE_VALGRIND int valgrind_id; #endif + unsigned char flags; } coro_cctx; -enum { - CF_RUNNING, /* coroutine is running */ - CF_READY, /* coroutine is ready */ +static coro_cctx *cctx_current; /* the currently running cctx */ + +/*****************************************************************************/ + +static MGVTBL coro_state_vtbl; + +enum +{ + CF_RUNNING = 0x0001, /* coroutine is running */ + CF_READY = 0x0002, /* coroutine is ready */ + CF_NEW = 0x0004, /* has never been switched to */ + CF_ZOMBIE = 0x0008, /* coroutine data has been freed */ + CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */ + CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */ }; +/* the structure where most of the perl state is stored, overlaid on the cxstack */ +typedef struct +{ + #define VARx(name,expr,type) type name; + #include "state.h" +} perl_slots; + +/* how many context stack entries do we need for perl_slots */ +#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) + /* this is a structure representing a perl-level coroutine */ -struct coro { - /* the c coroutine allocated to this perl coroutine, if any */ +struct coro +{ + /* the C coroutine allocated to this perl coroutine, if any */ coro_cctx *cctx; - /* data associated with this coroutine (initial args) */ - AV *args; - int refcnt; - int flags; - - /* optionally saved, might be zero */ - AV *defav; - SV *defsv; - SV *errsv; - -#define VAR(name,type) type name; -# include "state.h" -#undef VAR + /* ready queue */ + struct coro *next_ready; + + /* state data */ + struct CoroSLF slf_frame; /* saved slf frame */ + AV *mainstack; + perl_slots *slot; /* basically the saved sp */ + + CV *startcv; /* the CV to execute */ + AV *args; /* data associated with this coroutine (initial args) */ + int flags; /* CF_ flags */ + HV *hv; /* the perl hash associated with this coro, if any */ + + /* statistics */ + int usecount; /* number of transfers to this coro */ /* coro process data */ int prio; + SV *except; /* exception to be thrown */ + SV *rouse_cb; /* last rouse callback */ + AV *on_destroy; /* callbacks or coros to notify on destroy */ + AV *status; /* the exit status list */ + + /* async_pool */ + SV *saved_deffh; + SV *invoke_cb; + AV *invoke_av; + + /* on_enter/on_leave */ + AV *on_enter; AV *on_enter_xs; + AV *on_leave; AV *on_leave_xs; + + /* swap_sv */ + AV *swap_sv; + + /* times */ + coro_ts t_cpu, t_real; + + /* linked list */ + struct coro *next, *prev; }; typedef struct coro *Coro__State; typedef struct coro *Coro__State_or_hashref; -static AV * -coro_clone_padlist (CV *cv) +/* the following variables are effectively part of the perl context */ +/* and get copied between struct coro and these variables */ +/* the main reason we don't support windows process emulation */ +static struct CoroSLF slf_frame; /* the current slf frame */ + +/** Coro ********************************************************************/ + +#define CORO_PRIO_MAX 3 +#define CORO_PRIO_HIGH 1 +#define CORO_PRIO_NORMAL 0 +#define CORO_PRIO_LOW -1 +#define CORO_PRIO_IDLE -3 +#define CORO_PRIO_MIN -4 + +/* for Coro.pm */ +static SV *coro_current; +static SV *coro_readyhook; +static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */ +static CV *cv_coro_run; +static struct coro *coro_first; +#define coro_nready coroapi.nready + +/** JIT *********************************************************************/ + +#if CORO_JIT + /* APPLE doesn't have mmap though */ + #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__) + #ifndef CORO_JIT_TYPE + #if ECB_AMD64 && CORO_JIT_UNIXY + #define CORO_JIT_TYPE "amd64-unix" + #elif __i386 && CORO_JIT_UNIXY + #define CORO_JIT_TYPE "x86-unix" + #endif + #endif +#endif + +#if !defined(CORO_JIT_TYPE) || _POSIX_MEMORY_PROTECTION <= 0 + #undef CORO_JIT +#endif + +#if CORO_JIT + typedef void (*load_save_perl_slots_type)(perl_slots *); + static load_save_perl_slots_type load_perl_slots, save_perl_slots; +#endif + +/** Coro::Select ************************************************************/ + +static OP *(*coro_old_pp_sselect) (pTHX); +static SV *coro_select_select; + +/* horrible hack, but if it works... */ +static OP * +coro_pp_sselect (pTHX) { - AV *padlist = CvPADLIST (cv); - AV *newpadlist, *newpad; + dSP; + PUSHMARK (SP - 4); /* fake argument list */ + XPUSHs (coro_select_select); + PUTBACK; - newpadlist = newAV (); - AvREAL_off (newpadlist); -#if PERL_VERSION_ATLEAST (5,9,0) - Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); + /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */ + PL_op->op_flags |= OPf_STACKED; + PL_op->op_private = 0; + return PL_ppaddr [OP_ENTERSUB](aTHX); +} + +/** time stuff **************************************************************/ + +#ifdef HAS_GETTIMEOFDAY + +ecb_inline void +coro_u2time (pTHX_ UV ret[2]) +{ + struct timeval tv; + gettimeofday (&tv, 0); + + ret [0] = tv.tv_sec; + ret [1] = tv.tv_usec; +} + +ecb_inline double +coro_nvtime (void) +{ + struct timeval tv; + gettimeofday (&tv, 0); + + return tv.tv_sec + tv.tv_usec * 1e-6; +} + +ecb_inline void +time_init (pTHX) +{ + nvtime = coro_nvtime; + u2time = coro_u2time; +} + +#else + +ecb_inline void +time_init (pTHX) +{ + SV **svp; + + require_pv ("Time/HiRes.pm"); + + svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0); + + if (!svp) croak ("Time::HiRes is required, but missing. Caught"); + if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught"); + + nvtime = INT2PTR (double (*)(), SvIV (*svp)); + + svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0); + u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp)); +} + +#endif + +/** lowlevel stuff **********************************************************/ + +static SV * ecb_noinline +coro_get_sv (pTHX_ const char *name, int create) +{ +#if PERL_VERSION_ATLEAST (5,10,0) + /* silence stupid and wrong 5.10 warning that I am unable to switch off */ + get_sv (name, create); +#endif + return get_sv (name, create); +} + +static AV * ecb_noinline +coro_get_av (pTHX_ const char *name, int create) +{ +#if PERL_VERSION_ATLEAST (5,10,0) + /* silence stupid and wrong 5.10 warning that I am unable to switch off */ + get_av (name, create); +#endif + return get_av (name, create); +} + +static HV * ecb_noinline +coro_get_hv (pTHX_ const char *name, int create) +{ +#if PERL_VERSION_ATLEAST (5,10,0) + /* silence stupid and wrong 5.10 warning that I am unable to switch off */ + get_hv (name, create); +#endif + return get_hv (name, create); +} + +ecb_inline void +coro_times_update (void) +{ +#ifdef coro_clock_gettime + struct timespec ts; + + ts.tv_sec = ts.tv_nsec = 0; + coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts); + time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec; + + ts.tv_sec = ts.tv_nsec = 0; + coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts); + time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec; +#else + dTHX; + UV tv[2]; + + u2time (aTHX_ tv); + time_real [0] = tv [0]; + time_real [1] = tv [1] * 1000; +#endif +} + +ecb_inline void +coro_times_add (struct coro *c) +{ + c->t_real [1] += time_real [1]; + if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; } + c->t_real [0] += time_real [0]; + + c->t_cpu [1] += time_cpu [1]; + if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; } + c->t_cpu [0] += time_cpu [0]; +} + +ecb_inline void +coro_times_sub (struct coro *c) +{ + if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; } + c->t_real [1] -= time_real [1]; + c->t_real [0] -= time_real [0]; + + if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; } + c->t_cpu [1] -= time_cpu [1]; + c->t_cpu [0] -= time_cpu [0]; +} + +/*****************************************************************************/ +/* magic glue */ + +#define CORO_MAGIC_type_cv 26 +#define CORO_MAGIC_type_state PERL_MAGIC_ext + +#define CORO_MAGIC_NN(sv, type) \ + (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \ + ? SvMAGIC (sv) \ + : mg_find (sv, type)) + +#define CORO_MAGIC(sv, type) \ + (ecb_expect_true (SvMAGIC (sv)) \ + ? CORO_MAGIC_NN (sv, type) \ + : 0) + +#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv) +#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state) + +ecb_inline MAGIC * +SvSTATEhv_p (pTHX_ SV *coro) +{ + MAGIC *mg; + + if (ecb_expect_true ( + SvTYPE (coro) == SVt_PVHV + && (mg = CORO_MAGIC_state (coro)) + && mg->mg_virtual == &coro_state_vtbl + )) + return mg; + + return 0; +} + +ecb_inline struct coro * +SvSTATE_ (pTHX_ SV *coro_sv) +{ + MAGIC *mg; + + if (SvROK (coro_sv)) + coro_sv = SvRV (coro_sv); + + mg = SvSTATEhv_p (aTHX_ coro_sv); + if (!mg) + croak ("Coro::State object required"); + + return (struct coro *)mg->mg_ptr; +} + +#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv)) + +/* faster than SvSTATE, but expects a coroutine hv */ +#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr) +#define SvSTATE_current SvSTATE_hv (SvRV (coro_current)) + +/*****************************************************************************/ +/* padlist management and caching */ + +ecb_inline PADLIST * +coro_derive_padlist (pTHX_ CV *cv) +{ + PADLIST *padlist = CvPADLIST (cv); + PADLIST *newpadlist; + PADNAMELIST *padnames; + PAD *newpad; + PADOFFSET off = PadlistMAX (padlist) + 1; + +#if NEWPADAPI + + /* if we had the original CvDEPTH, we might be able to steal the CvDEPTH+1 entry instead */ + /* 20131102194744.GA6705@schmorp.de, 20131102195825.2013.qmail@lists-nntp.develooper.com */ + while (!PadlistARRAY (padlist)[off - 1]) + --off; + + Perl_pad_push (aTHX_ padlist, off); + + newpad = PadlistARRAY (padlist)[off]; + PadlistARRAY (padlist)[off] = 0; + +#else + +#if PERL_VERSION_ATLEAST (5,10,0) + Perl_pad_push (aTHX_ padlist, off); #else - Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); + Perl_pad_push (aTHX_ padlist, off, 1); +#endif + + newpad = PadlistARRAY (padlist)[off]; + PadlistMAX (padlist) = off - 1; + +#endif + + newPADLIST (newpadlist); +#if !PERL_VERSION_ATLEAST(5,15,3) + /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */ + AvREAL_off (newpadlist); #endif - newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; - --AvFILLp (padlist); - av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); - av_store (newpadlist, 1, (SV *)newpad); + /* Already extended to 2 elements by newPADLIST. */ + PadlistMAX (newpadlist) = 1; + + padnames = PadlistNAMES (padlist); + ++PadnamelistREFCNT (padnames); + PadlistNAMES (newpadlist) = padnames; + + PadlistARRAY (newpadlist)[1] = newpad; return newpadlist; } -static void -free_padlist (AV *padlist) +ecb_inline void +free_padlist (pTHX_ PADLIST *padlist) { /* may be during global destruction */ - if (SvREFCNT (padlist)) + if (!IN_DESTRUCT) { - I32 i = AvFILLp (padlist); - while (i >= 0) + I32 i = PadlistMAX (padlist); + + while (i > 0) /* special-case index 0 */ { - SV **svp = av_fetch (padlist, i--, FALSE); - if (svp) + /* we try to be extra-careful here */ + PAD *pad = PadlistARRAY (padlist)[i--]; + + if (pad) { - SV *sv; - while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) - SvREFCNT_dec (sv); + I32 j = PadMAX (pad); - SvREFCNT_dec (*svp); + while (j >= 0) + SvREFCNT_dec (PadARRAY (pad)[j--]); + + PadMAX (pad) = -1; + SvREFCNT_dec (pad); } } + PadnamelistREFCNT_dec (PadlistNAMES (padlist)); + +#if NEWPADAPI + Safefree (PadlistARRAY (padlist)); + Safefree (padlist); +#else + AvFILLp (padlist) = -1; + AvREAL_off (padlist); SvREFCNT_dec ((SV*)padlist); +#endif } } static int coro_cv_free (pTHX_ SV *sv, MAGIC *mg) { - AV *padlist; - AV *av = (AV *)mg->mg_obj; + PADLIST *padlist; + PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t)); + size_t len = *(size_t *)mg->mg_ptr; - /* casting is fun. */ - while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) - free_padlist (padlist); + /* perl manages to free our internal AV and _then_ call us */ + if (IN_DESTRUCT) + return 0; - SvREFCNT_dec (av); + while (len--) + free_padlist (aTHX_ padlists[len]); return 0; } -#define PERL_MAGIC_coro PERL_MAGIC_ext - -static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; - -#define CORO_MAGIC(cv) \ - SvMAGIC (cv) \ - ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ - ? SvMAGIC (cv) \ - : mg_find ((SV *)cv, PERL_MAGIC_coro) \ - : 0 +static MGVTBL coro_cv_vtbl = { + 0, 0, 0, 0, + coro_cv_free +}; /* the next two functions merely cache the padlists */ -static void -get_padlist (CV *cv) +ecb_inline void +get_padlist (pTHX_ CV *cv) { - MAGIC *mg = CORO_MAGIC (cv); - AV *av; + MAGIC *mg = CORO_MAGIC_cv (cv); + size_t *lenp; - if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) - CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; + if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr))) + CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp]; else { -#if 0 - /* this is probably cleaner, but also slower? */ - CV *cp = Perl_cv_clone (cv); +#if CORO_PREFER_PERL_FUNCTIONS + /* this is probably cleaner? but also slower! */ + /* in practise, it seems to be less stable */ + CV *cp = Perl_cv_clone (aTHX_ cv); CvPADLIST (cv) = CvPADLIST (cp); CvPADLIST (cp) = 0; SvREFCNT_dec (cp); #else - CvPADLIST (cv) = coro_clone_padlist (cv); + CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv); #endif } } -static void -put_padlist (CV *cv) +ecb_inline void +put_padlist (pTHX_ CV *cv) { - MAGIC *mg = CORO_MAGIC (cv); - AV *av; + MAGIC *mg = CORO_MAGIC_cv (cv); - if (!mg) + if (ecb_expect_false (!mg)) { - sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0); - mg = mg_find ((SV *)cv, PERL_MAGIC_coro); - mg->mg_virtual = &vtbl_coro; - mg->mg_obj = (SV *)newAV (); + mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0); + Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char); + mg->mg_len = 1; /* so mg_free frees mg_ptr */ } + else + Renew (mg->mg_ptr, + sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *), + char); + + ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv); +} + +/** load & save, init *******************************************************/ + +ecb_inline void +swap_sv (SV *a, SV *b) +{ + const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */ + SV tmp; + + /* swap sv_any */ + SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp); + + /* swap sv_flags */ + SvFLAGS (&tmp) = SvFLAGS (a); + SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep); + SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep); + +#if PERL_VERSION_ATLEAST (5,10,0) + /* perl 5.10 and later complicates this _quite_ a bit, but it also + * is much faster, so no quarrels here. alternatively, we could + * sv_upgrade to avoid this. + */ + { + /* swap sv_u */ + tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u; + + /* if SvANY points to the head, we need to adjust the pointers, + * as the pointer for a still points to b, and maybe vice versa. + */ + U32 svany_in_head_set = (1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV); + #if NVSIZE <= IVSIZE && PERL_VERSION_ATLEAST(5,22,0) + svany_in_head_set |= 1 << SVt_NV; + #endif + + #define svany_in_head(type) (svany_in_head_set & (1 << (type))) - av = (AV *)mg->mg_obj; + if (svany_in_head (SvTYPE (a))) + SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a); - if (AvFILLp (av) >= AvMAX (av)) - av_extend (av, AvMAX (av) + 1); + if (svany_in_head (SvTYPE (b))) + SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b); + } +#endif +} - AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); +/* swap sv heads, at least logically */ +static void +swap_svs_enter (pTHX_ Coro__State c) +{ + int i; + + for (i = 0; i <= AvFILLp (c->swap_sv); i += 2) + swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]); } -#define SB do { -#define SE } while (0) +static void +swap_svs_leave (pTHX_ Coro__State c) +{ + int i; + + for (i = AvFILLp (c->swap_sv) - 1; i >= 0; i -= 2) + swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]); +} -#define LOAD(state) load_state((state)); -#define SAVE(state,flags) save_state((state),(flags)); +#define SWAP_SVS_ENTER(coro) \ + if (ecb_expect_false ((coro)->swap_sv)) \ + swap_svs_enter (aTHX_ (coro)) + +#define SWAP_SVS_LEAVE(coro) \ + if (ecb_expect_false ((coro)->swap_sv)) \ + swap_svs_leave (aTHX_ (coro)) -#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE +static void +on_enterleave_call (pTHX_ SV *cb); static void -load_state(Coro__State c) +load_perl (pTHX_ Coro__State c) { -#define VAR(name,type) PL_ ## name = c->name; -# include "state.h" -#undef VAR + perl_slots *slot = c->slot; + c->slot = 0; - if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); - if (c->defsv) REPLACE_SV (DEFSV , c->defsv); - if (c->errsv) REPLACE_SV (ERRSV , c->errsv); + PL_mainstack = c->mainstack; + +#if CORO_JIT + load_perl_slots (slot); +#else + #define VARx(name,expr,type) expr = slot->name; + #include "state.h" +#endif { dSP; + CV *cv; /* now do the ugly restore mess */ - while ((cv = (CV *)POPs)) + while (ecb_expect_true (cv = (CV *)POPs)) { - put_padlist (cv); /* mark this padlist as available */ + put_padlist (aTHX_ cv); /* mark this padlist as available */ CvDEPTH (cv) = PTR2IV (POPs); - CvPADLIST (cv) = (AV *)POPs; + CvPADLIST (cv) = (PADLIST *)POPs; } PUTBACK; } + + slf_frame = c->slf_frame; + CORO_THROW = c->except; + + if (ecb_expect_false (enable_times)) + { + if (ecb_expect_false (!times_valid)) + coro_times_update (); + + coro_times_sub (c); + } + + if (ecb_expect_false (c->on_enter)) + { + int i; + + for (i = 0; i <= AvFILLp (c->on_enter); ++i) + on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]); + } + + if (ecb_expect_false (c->on_enter_xs)) + { + int i; + + for (i = 0; i <= AvFILLp (c->on_enter_xs); i += 2) + ((coro_enterleave_hook)AvARRAY (c->on_enter_xs)[i]) (aTHX_ AvARRAY (c->on_enter_xs)[i + 1]); + } + + SWAP_SVS_ENTER (c); } static void -save_state(Coro__State c, int flags) +save_perl (pTHX_ Coro__State c) { + SWAP_SVS_LEAVE (c); + + if (ecb_expect_false (c->on_leave_xs)) + { + int i; + + for (i = AvFILLp (c->on_leave_xs) - 1; i >= 0; i -= 2) + ((coro_enterleave_hook)AvARRAY (c->on_leave_xs)[i]) (aTHX_ AvARRAY (c->on_leave_xs)[i + 1]); + } + + if (ecb_expect_false (c->on_leave)) + { + int i; + + for (i = AvFILLp (c->on_leave); i >= 0; --i) + on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]); + } + + times_valid = 0; + + if (ecb_expect_false (enable_times)) + { + coro_times_update (); times_valid = 1; + coro_times_add (c); + } + + c->except = CORO_THROW; + c->slf_frame = slf_frame; + { dSP; I32 cxix = cxstack_ix; @@ -325,70 +860,80 @@ * (and reinitialize) all cv's in the whole callchain :( */ - PUSHs (Nullsv); + XPUSHs (Nullsv); /* this loop was inspired by pp_caller */ for (;;) { - while (cxix >= 0) + while (ecb_expect_true (cxix >= 0)) { PERL_CONTEXT *cx = &ccstk[cxix--]; - if (CxTYPE(cx) == CXt_SUB) + if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT)) { CV *cv = cx->blk_sub.cv; - if (CvDEPTH (cv)) + if (ecb_expect_true (CvDEPTH (cv))) { EXTEND (SP, 3); - - PUSHs ((SV *)CvPADLIST(cv)); - PUSHs (INT2PTR (SV *, CvDEPTH (cv))); + PUSHs ((SV *)CvPADLIST (cv)); + PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv))); PUSHs ((SV *)cv); CvDEPTH (cv) = 0; - get_padlist (cv); + get_padlist (aTHX_ cv); } } -#ifdef CXt_FORMAT - else if (CxTYPE(cx) == CXt_FORMAT) - { - /* I never used formats, so how should I know how these are implemented? */ - /* my bold guess is as a simple, plain sub... */ - croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats"); - } -#endif } - if (top_si->si_type == PERLSI_MAIN) + if (ecb_expect_true (top_si->si_type == PERLSI_MAIN)) break; top_si = top_si->si_prev; - ccstk = top_si->si_cxstack; - cxix = top_si->si_cxix; + ccstk = top_si->si_cxstack; + cxix = top_si->si_cxix; } PUTBACK; } - c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; - c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; - c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; - -#define VAR(name,type)c->name = PL_ ## name; -# include "state.h" -#undef VAR + /* allocate some space on the context stack for our purposes */ + if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max)) + { + unsigned int i; + + for (i = 0; i < SLOT_COUNT; ++i) + CXINC; + + cxstack_ix -= SLOT_COUNT; /* undo allocation */ + } + + c->mainstack = PL_mainstack; + + { + perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); + +#if CORO_JIT + save_perl_slots (slot); +#else + #define VARx(name,expr,type) slot->name = expr; + #include "state.h" +#endif + } } /* - * allocate various perl stacks. This is an exact copy + * allocate various perl stacks. This is almost an exact copy * of perl.c:init_stacks, except that it uses less memory * on the (sometimes correct) assumption that coroutines do * not usually need a lot of stackspace. */ +#if CORO_PREFER_PERL_FUNCTIONS +# define coro_init_stacks(thx) init_stacks () +#else static void -coro_init_stacks () +coro_init_stacks (pTHX) { - PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); + PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */ PL_curstackinfo->si_type = PERLSI_MAIN; PL_curstack = PL_curstackinfo->si_stack; PL_mainstack = PL_curstack; /* remember in case we switch stacks */ @@ -397,10 +942,10 @@ PL_stack_sp = PL_stack_base; PL_stack_max = PL_stack_base + AvMAX(PL_curstack); - New(50,PL_tmps_stack,96,SV*); + New(50,PL_tmps_stack,32,SV*); PL_tmps_floor = -1; PL_tmps_ix = -1; - PL_tmps_max = 96; + PL_tmps_max = 32; New(54,PL_markstack,16,I32); PL_markstack_ptr = PL_markstack; @@ -410,38 +955,36 @@ SET_MARK_OFFSET; #endif - New(54,PL_scopestack,16,I32); + New(54,PL_scopestack,8,I32); PL_scopestack_ix = 0; - PL_scopestack_max = 16; + PL_scopestack_max = 8; +#if HAS_SCOPESTACK_NAME + New(54,PL_scopestack_name,8,const char*); +#endif - New(54,PL_savestack,96,ANY); + New(54,PL_savestack,24,ANY); PL_savestack_ix = 0; - PL_savestack_max = 96; + PL_savestack_max = 24; +#if !PERL_VERSION_ATLEAST (5,24,0) + /* perl 5.24 moves SS_MAXPUSH optimisation from */ + /* the header macros to PL_savestack_max */ + PL_savestack_max -= SS_MAXPUSH; +#endif -#if !PERL_VERSION_ATLEAST (5,9,0) - New(54,PL_retstack,8,OP*); +#if !PERL_VERSION_ATLEAST (5,10,0) + New(54,PL_retstack,4,OP*); PL_retstack_ix = 0; - PL_retstack_max = 8; + PL_retstack_max = 4; #endif } +#endif /* * destroy the stacks, the callchain etc... */ static void -coro_destroy_stacks () +coro_destruct_stacks (pTHX) { - if (!IN_DESTRUCT) - { - /* is this ugly, I ask? */ - LEAVE_SCOPE (0); - - /* sure it is, but more important: is it correct?? :/ */ - FREETMPS; - - /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/ - } - while (PL_curstackinfo->si_next) PL_curstackinfo = PL_curstackinfo->si_next; @@ -449,17 +992,8 @@ { PERL_SI *p = PL_curstackinfo->si_prev; - { /*D*//*remove*/ - dSP; - SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack); - PUTBACK; /* possibly superfluous */ - } - if (!IN_DESTRUCT) - { - dounwind (-1);/*D*//*remove*/ - SvREFCNT_dec (PL_curstackinfo->si_stack); - } + SvREFCNT_dec (PL_curstackinfo->si_stack); Safefree (PL_curstackinfo->si_cxstack); Safefree (PL_curstackinfo); @@ -469,344 +1003,844 @@ Safefree (PL_tmps_stack); Safefree (PL_markstack); Safefree (PL_scopestack); +#if HAS_SCOPESTACK_NAME + Safefree (PL_scopestack_name); +#endif Safefree (PL_savestack); -#if !PERL_VERSION_ATLEAST (5,9,0) +#if !PERL_VERSION_ATLEAST (5,10,0) Safefree (PL_retstack); #endif } +#define CORO_RSS \ + rss += sizeof (SYM (curstackinfo)); \ + rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \ + rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \ + rss += SYM (tmps_max) * sizeof (SV *); \ + rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \ + rss += SYM (scopestack_max) * sizeof (I32); \ + rss += SYM (savestack_max) * sizeof (ANY); + +static size_t +coro_rss (pTHX_ struct coro *coro) +{ + size_t rss = sizeof (*coro); + + if (coro->mainstack) + { + if (coro->flags & CF_RUNNING) + { + #define SYM(sym) PL_ ## sym + CORO_RSS; + #undef SYM + } + else + { + #define SYM(sym) coro->slot->sym + CORO_RSS; + #undef SYM + } + } + + return rss; +} + +/** coroutine stack handling ************************************************/ + +static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg); +static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg); +static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg); + +/* apparently < 5.8.8 */ +#ifndef MgPV_nolen_const +#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \ + SvPV_nolen((SV*)((mg)->mg_ptr)) : \ + (const char*)(mg)->mg_ptr) +#endif + +/* + * This overrides the default magic get method of %SIG elements. + * The original one doesn't provide for reading back of PL_diehook/PL_warnhook + * and instead of trying to save and restore the hash elements (extremely slow), + * we just provide our own readback here. + */ +static int ecb_cold +coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg) +{ + const char *s = MgPV_nolen_const (mg); + + if (*s == '_') + { + SV **svp = 0; + + if (strEQ (s, "__DIE__" )) svp = &PL_diehook; + if (strEQ (s, "__WARN__")) svp = &PL_warnhook; + + if (svp) + { + SV *ssv; + + if (!*svp) + ssv = &PL_sv_undef; + else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */ + ssv = sv_2mortal (newRV_inc (*svp)); + else + ssv = *svp; + + sv_setsv (sv, ssv); + return 0; + } + } + + return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0; +} + +static int ecb_cold +coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg) +{ + const char *s = MgPV_nolen_const (mg); + + if (*s == '_') + { + SV **svp = 0; + + if (strEQ (s, "__DIE__" )) svp = &PL_diehook; + if (strEQ (s, "__WARN__")) svp = &PL_warnhook; + + if (svp) + { + SV *old = *svp; + *svp = 0; + SvREFCNT_dec (old); + return 0; + } + } + + return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0; +} + +static int ecb_cold +coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg) +{ + const char *s = MgPV_nolen_const (mg); + + if (*s == '_') + { + SV **svp = 0; + + if (strEQ (s, "__DIE__" )) svp = &PL_diehook; + if (strEQ (s, "__WARN__")) svp = &PL_warnhook; + + if (svp) + { + SV *old = *svp; + *svp = SvOK (sv) ? newSVsv (sv) : 0; + SvREFCNT_dec (old); + return 0; + } + } + + return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; +} + static void -setup_coro (struct coro *coro) +prepare_nop (pTHX_ struct coro_transfer_args *ta) +{ + /* kind of mega-hacky, but works */ + ta->next = ta->prev = (struct coro *)ta; +} + +static int +slf_check_nop (pTHX_ struct CoroSLF *frame) +{ + return 0; +} + +static int +slf_check_repeat (pTHX_ struct CoroSLF *frame) +{ + return 1; +} + +static UNOP init_perl_op; + +ecb_noinline static void /* noinline to keep it out of the transfer fast path */ +init_perl (pTHX_ struct coro *coro) { /* * emulate part of the perl startup here. */ + coro_init_stacks (aTHX); - coro_init_stacks (); + PL_runops = RUNOPS_DEFAULT; + PL_curcop = &PL_compiling; + PL_in_eval = EVAL_NULL; + PL_comppad = 0; + PL_comppad_name = 0; + PL_comppad_name_fill = 0; + PL_comppad_name_floor = 0; + PL_curpm = 0; + PL_curpad = 0; + PL_localizing = 0; + PL_restartop = 0; +#if PERL_VERSION_ATLEAST (5,10,0) + PL_parser = 0; +#endif + PL_hints = 0; - PL_curcop = 0; - PL_in_eval = 0; - PL_curpm = 0; + /* recreate the die/warn hooks */ + PL_diehook = SvREFCNT_inc (rv_diehook); + PL_warnhook = SvREFCNT_inc (rv_warnhook); + + GvSV (PL_defgv) = newSV (0); + GvAV (PL_defgv) = coro->args; coro->args = 0; + GvSV (PL_errgv) = newSV (0); + GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); + GvHV (PL_hintgv) = newHV (); +#if PERL_VERSION_ATLEAST (5,10,0) + hv_magic (GvHV (PL_hintgv), 0, PERL_MAGIC_hints); +#endif + PL_rs = newSVsv (GvSV (irsgv)); + PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv); { dSP; - LOGOP myop; - - /* I have no idea why this is needed, but it is */ - PUSHMARK (SP); + UNOP myop; - SvREFCNT_dec (GvAV (PL_defgv)); - GvAV (PL_defgv) = coro->args; coro->args = 0; - - Zero (&myop, 1, LOGOP); - myop.op_next = Nullop; + Zero (&myop, 1, UNOP); + myop.op_next = Nullop; + myop.op_type = OP_ENTERSUB; myop.op_flags = OPf_WANT_VOID; - PL_op = (OP *)&myop; - PUSHMARK (SP); - XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE)); + PUSHs ((SV *)coro->startcv); PUTBACK; + PL_op = (OP *)&myop; PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); - SPAGAIN; - - ENTER; /* necessary e.g. for dounwind */ } + + /* this newly created coroutine might be run on an existing cctx which most + * likely was suspended in pp_slf, so we have to emulate entering pp_slf here. + */ + slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */ + slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */ + slf_frame.destroy = 0; + + /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */ + init_perl_op.op_next = PL_op; + init_perl_op.op_type = OP_ENTERSUB; + init_perl_op.op_ppaddr = pp_slf; + /* no flags etc. required, as an init function won't be called */ + + PL_op = (OP *)&init_perl_op; + + /* copy throw, in case it was set before init_perl */ + CORO_THROW = coro->except; + + SWAP_SVS_ENTER (coro); + + if (ecb_expect_false (enable_times)) + { + coro_times_update (); + coro_times_sub (coro); + } } static void -free_coro_mortal () +coro_unwind_stacks (pTHX) { - if (coro_mortal) + if (!IN_DESTRUCT) { - SvREFCNT_dec (coro_mortal); + /* restore all saved variables and stuff */ + LEAVE_SCOPE (0); + assert (PL_tmps_floor == -1); + + /* free all temporaries */ + FREETMPS; + assert (PL_tmps_ix == -1); + + /* unwind all extra stacks */ + POPSTACK_TO (PL_mainstack); + + /* unwind main stack */ + dounwind (-1); + } +} + +static void +destroy_perl (pTHX_ struct coro *coro) +{ + SV *svf [9]; + + { + SV *old_current = SvRV (coro_current); + struct coro *current = SvSTATE (old_current); + + assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack)); + + save_perl (aTHX_ current); + + /* this will cause transfer_check to croak on block*/ + SvRV_set (coro_current, (SV *)coro->hv); + + load_perl (aTHX_ coro); + + /* restore swapped sv's */ + SWAP_SVS_LEAVE (coro); + + coro_unwind_stacks (aTHX); + + coro_destruct_stacks (aTHX); + + /* now save some sv's to be free'd later */ + svf [0] = GvSV (PL_defgv); + svf [1] = (SV *)GvAV (PL_defgv); + svf [2] = GvSV (PL_errgv); + svf [3] = (SV *)PL_defoutgv; + svf [4] = PL_rs; + svf [5] = GvSV (irsgv); + svf [6] = (SV *)GvHV (PL_hintgv); + svf [7] = PL_diehook; + svf [8] = PL_warnhook; + assert (9 == sizeof (svf) / sizeof (*svf)); + + SvRV_set (coro_current, old_current); + + load_perl (aTHX_ current); + } + + { + unsigned int i; + + for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i) + SvREFCNT_dec (svf [i]); + + SvREFCNT_dec (coro->saved_deffh); + SvREFCNT_dec (coro->rouse_cb); + SvREFCNT_dec (coro->invoke_cb); + SvREFCNT_dec (coro->invoke_av); + SvREFCNT_dec (coro->on_enter_xs); + SvREFCNT_dec (coro->on_leave_xs); + } +} + +ecb_inline void +free_coro_mortal (pTHX) +{ + if (ecb_expect_true (coro_mortal)) + { + SvREFCNT_dec ((SV *)coro_mortal); coro_mortal = 0; } } -static void NOINLINE -prepare_cctx (coro_cctx *cctx) +static int +runops_trace (pTHX) { - dSP; - LOGOP myop; + COP *oldcop = 0; + int oldcxix = -2; - Zero (&myop, 1, LOGOP); - myop.op_next = PL_op; - myop.op_flags = OPf_WANT_VOID; + while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) + { + PERL_ASYNC_CHECK (); - sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx)); + if (cctx_current->flags & CC_TRACE_ALL) + { + if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB) + { + PERL_CONTEXT *cx = &cxstack[cxstack_ix]; + SV **bot, **top; + AV *av = newAV (); /* return values */ + SV **cb; + dSP; + + GV *gv = CvGV (cx->blk_sub.cv); + SV *fullname = sv_2mortal (newSV (0)); + if (isGV (gv)) + gv_efullname3 (fullname, gv, 0); + + bot = PL_stack_base + cx->blk_oldsp + 1; + top = cx->blk_gimme == G_ARRAY ? SP + 1 + : cx->blk_gimme == G_SCALAR ? bot + 1 + : bot; + + av_extend (av, top - bot); + while (bot < top) + av_push (av, SvREFCNT_inc_NN (*bot++)); + + PL_runops = RUNOPS_DEFAULT; + ENTER; + SAVETMPS; + EXTEND (SP, 3); + PUSHMARK (SP); + PUSHs (&PL_sv_no); + PUSHs (fullname); + PUSHs (sv_2mortal (newRV_noinc ((SV *)av))); + PUTBACK; + cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); + if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); + SPAGAIN; + FREETMPS; + LEAVE; + PL_runops = runops_trace; + } - PUSHMARK (SP); - XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); - PUTBACK; - PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX); - SPAGAIN; + if (oldcop != PL_curcop) + { + oldcop = PL_curcop; + + if (PL_curcop != &PL_compiling) + { + SV **cb; + + if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB && cxstack_ix >= 0) + { + PERL_CONTEXT *cx = &cxstack[cxstack_ix]; + + if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) + { + dSP; + GV *gv = CvGV (cx->blk_sub.cv); + SV *fullname = sv_2mortal (newSV (0)); + + if (isGV (gv)) + gv_efullname3 (fullname, gv, 0); + + PL_runops = RUNOPS_DEFAULT; + ENTER; + SAVETMPS; + EXTEND (SP, 3); + PUSHMARK (SP); + PUSHs (&PL_sv_yes); + PUSHs (fullname); + PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); + PUTBACK; + cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); + if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); + SPAGAIN; + FREETMPS; + LEAVE; + PL_runops = runops_trace; + } + + oldcxix = cxstack_ix; + } + + if (cctx_current->flags & CC_TRACE_LINE) + { + dSP; + + PL_runops = RUNOPS_DEFAULT; + ENTER; + SAVETMPS; + EXTEND (SP, 3); + PL_runops = RUNOPS_DEFAULT; + PUSHMARK (SP); + PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0))); + PUSHs (sv_2mortal (newSViv (CopLINE (oldcop)))); + PUTBACK; + cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0); + if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); + SPAGAIN; + FREETMPS; + LEAVE; + PL_runops = runops_trace; + } + } + } + } + } + + TAINT_NOT; + return 0; } +static struct CoroSLF cctx_ssl_frame; + static void -coro_run (void *arg) +slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta) { - /* coro_run is the alternative epilogue of transfer() */ - UNLOCK; + ta->prev = 0; +} - /* - * this is a _very_ stripped down perl interpreter ;) - */ +static int +slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame) +{ + *frame = cctx_ssl_frame; + + return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */ +} + +/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */ +static void ecb_noinline +cctx_prepare (pTHX) +{ PL_top_env = &PL_start_env; - /* inject call to cctx_init */ - prepare_cctx ((coro_cctx *)arg); + if (cctx_current->flags & CC_TRACE) + PL_runops = runops_trace; - /* somebody will hit me for both perl_run and PL_restartop */ - perl_run (PL_curinterp); + /* we already must be executing an SLF op, there is no other valid way + * that can lead to creation of a new cctx */ + assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)", + slf_frame.prepare && PL_op->op_ppaddr == pp_slf)); - fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); - abort (); + /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */ + cctx_ssl_frame = slf_frame; + + slf_frame.prepare = slf_prepare_set_stacklevel; + slf_frame.check = slf_check_set_stacklevel; +} + +/* the tail of transfer: execute stuff we can only do after a transfer */ +ecb_inline void +transfer_tail (pTHX) +{ + free_coro_mortal (aTHX); +} + +/* try to exit the same way perl's main function would do */ +/* we do not bother resetting the environment or other things *7 +/* that are not, uhm, essential */ +/* this obviously also doesn't work when perl is embedded */ +static void ecb_noinline ecb_cold +perlish_exit (pTHX) +{ + int exitstatus = perl_destruct (PL_curinterp); + perl_free (PL_curinterp); + exit (exitstatus); +} + +/* + * this is a _very_ stripped down perl interpreter ;) + */ +static void +cctx_run (void *arg) +{ +#ifdef USE_ITHREADS +# if CORO_PTHREAD + PERL_SET_CONTEXT (coro_thx); +# endif +#endif + { + dTHX; + + /* normally we would need to skip the entersub here */ + /* not doing so will re-execute it, which is exactly what we want */ + /* PL_nop = PL_nop->op_next */ + + /* inject a fake subroutine call to cctx_init */ + cctx_prepare (aTHX); + + /* cctx_run is the alternative tail of transfer() */ + transfer_tail (aTHX); + + /* somebody or something will hit me for both perl_run and PL_restartop */ + PL_restartop = PL_op; + perl_run (PL_curinterp); + /* + * Unfortunately, there is no way to get at the return values of the + * coro body here, as perl_run destroys these. Likewise, we cannot catch + * runtime errors here, as this is just a random interpreter, not a thread. + */ + + /* + * pp_entersub in 5.24 no longer ENTERs, but perl_destruct + * requires PL_scopestack_ix, so do it here if required. + */ + if (!PL_scopestack_ix) + ENTER; + + /* + * If perl-run returns we assume exit() was being called or the coro + * fell off the end, which seems to be the only valid (non-bug) + * reason for perl_run to return. We try to mimic whatever perl is normally + * doing in that case. YMMV. + */ + perlish_exit (aTHX); + } } static coro_cctx * -cctx_new () +cctx_new (void) { coro_cctx *cctx; ++cctx_count; - New (0, cctx, 1, coro_cctx); -#if HAVE_MMAP + cctx->gen = cctx_gen; + cctx->flags = 0; + cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */ - cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; - /* mmap suppsedly does allocate-on-write for us */ - cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); + return cctx; +} - if (cctx->sptr == (void *)-1) - { - perror ("FATAL: unable to mmap stack for coroutine"); - _exit (EXIT_FAILURE); - } +/* create a new cctx only suitable as source */ +static coro_cctx * +cctx_new_empty (void) +{ + coro_cctx *cctx = cctx_new (); -# if STACKGUARD - mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); -# endif + cctx->stack.sptr = 0; + coro_create (&cctx->cctx, 0, 0, 0, 0); -#else + return cctx; +} - cctx->ssize = STACKSIZE * (long)sizeof (long); - New (0, cctx->sptr, STACKSIZE, long); +/* create a new cctx suitable as destination/running a perl interpreter */ +static coro_cctx * +cctx_new_run (void) +{ + coro_cctx *cctx = cctx_new (); - if (!cctx->sptr) + if (!coro_stack_alloc (&cctx->stack, cctx_stacksize)) { - perror ("FATAL: unable to malloc stack for coroutine"); + perror ("FATAL: unable to allocate stack for coroutine, exiting."); _exit (EXIT_FAILURE); } -#endif - -#if USE_VALGRIND - cctx->valgrind_id = VALGRIND_STACK_REGISTER ( - STACKGUARD * PAGESIZE + (char *)cctx->sptr, - cctx->ssize + (char *)cctx->sptr - ); -#endif - - coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize); + coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze); return cctx; } static void -cctx_free (coro_cctx *cctx) +cctx_destroy (coro_cctx *cctx) { if (!cctx) return; - --cctx_count; + assert (("FATAL: tried to destroy current cctx", cctx != cctx_current)); -#if USE_VALGRIND - VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); -#endif + --cctx_count; + coro_destroy (&cctx->cctx); -#if HAVE_MMAP - munmap (cctx->sptr, cctx->ssize); -#else - Safefree (cctx->sptr); -#endif + coro_stack_free (&cctx->stack); Safefree (cctx); } +/* wether this cctx should be destructed */ +#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE)) + static coro_cctx * -cctx_get () +cctx_get (pTHX) { - coro_cctx *cctx; - - if (cctx_first) + while (ecb_expect_true (cctx_first)) { - --cctx_idle; - cctx = cctx_first; + coro_cctx *cctx = cctx_first; cctx_first = cctx->next; + --cctx_idle; + + if (ecb_expect_true (!CCTX_EXPIRED (cctx))) + return cctx; + + cctx_destroy (cctx); } - else - { - cctx = cctx_new (); - PL_op = PL_op->op_next; - } - return cctx; + return cctx_new_run (); } static void cctx_put (coro_cctx *cctx) { + assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr)); + + /* free another cctx if overlimit */ + if (ecb_expect_false (cctx_idle >= cctx_max_idle)) + { + coro_cctx *first = cctx_first; + cctx_first = first->next; + --cctx_idle; + + cctx_destroy (first); + } + ++cctx_idle; cctx->next = cctx_first; cctx_first = cctx; } -/* never call directly, always through the coro_state_transfer global variable */ -static void NOINLINE -transfer (struct coro *prev, struct coro *next, int flags) +/** coroutine switching *****************************************************/ + +static void +transfer_check (pTHX_ struct coro *prev, struct coro *next) +{ + /* TODO: throwing up here is considered harmful */ + + if (ecb_expect_true (prev != next)) + { + if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) + croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,"); + + if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED))) + croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,"); + +#if !PERL_VERSION_ATLEAST (5,10,0) + if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING)) + croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,"); +#endif + } +} + +/* always use the TRANSFER macro */ +static void ecb_noinline /* noinline so we have a fixed stackframe */ +transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) { dSTACKLEVEL; /* sometimes transfer is only called to set idle_sp */ - if (flags == TRANSFER_SET_STACKLEVEL) - ((coro_cctx *)prev)->idle_sp = STACKLEVEL; - else if (prev != next) + if (ecb_expect_false (!prev)) + { + cctx_current->idle_sp = STACKLEVEL; + assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ + } + else if (ecb_expect_true (prev != next)) { - coro_cctx *prev__cctx; + coro_cctx *cctx_prev; - if (!prev->cctx) + if (ecb_expect_false (prev->flags & CF_NEW)) { - /* create a new empty context */ - Newz (0, prev->cctx, 1, coro_cctx); - prev->cctx->inuse = 1; - prev->flags |= CF_RUNNING; + /* create a new empty/source context */ + prev->flags &= ~CF_NEW; + prev->flags |= CF_RUNNING; } - if (!prev->flags & CF_RUNNING) - croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states"); - - if (next->flags & CF_RUNNING) - croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states"); - prev->flags &= ~CF_RUNNING; next->flags |= CF_RUNNING; - LOCK; + /* first get rid of the old state */ + save_perl (aTHX_ prev); - if (next->mainstack) - { - /* coroutine already started */ - SAVE (prev, flags); - LOAD (next); - } - else + if (ecb_expect_false (next->flags & CF_NEW)) { /* need to start coroutine */ - /* first get rid of the old state */ - SAVE (prev, -1); + next->flags &= ~CF_NEW; /* setup coroutine call */ - setup_coro (next); - /* need a new stack */ - assert (!next->stack); + init_perl (aTHX_ next); } + else + load_perl (aTHX_ next); - prev__cctx = prev->cctx; - - /* possibly "free" the cctx */ - if (prev__cctx->idle_sp == STACKLEVEL) + /* possibly untie and reuse the cctx */ + if (ecb_expect_true ( + cctx_current->idle_sp == STACKLEVEL + && !(cctx_current->flags & CC_TRACE) + && !force_cctx + )) { - assert (PL_top_env == prev__cctx->top_env); + /* I assume that stacklevel is a stronger indicator than PL_top_env changes */ + assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te)); + + /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */ + /* without this the next cctx_get might destroy the running cctx while still in use */ + if (ecb_expect_false (CCTX_EXPIRED (cctx_current))) + if (ecb_expect_true (!next->cctx)) + next->cctx = cctx_get (aTHX); - cctx_put (prev__cctx); - prev->cctx = 0; + cctx_put (cctx_current); } - else if (prev__cctx->idle_sp) //D - fprintf (stderr, "coro %p has own stack %p-%p\n", prev__cctx, prev__cctx->idle_sp, STACKLEVEL);//D + else + prev->cctx = cctx_current; - if (!next->cctx) - next->cctx = cctx_get (); + ++next->usecount; - if (prev__cctx != next->cctx) - { - assert ( prev__cctx->inuse); - assert (!next->cctx->inuse); + cctx_prev = cctx_current; + cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX); - prev__cctx->inuse = 0; - next->cctx->inuse = 1; + next->cctx = 0; - prev__cctx->top_env = PL_top_env; - PL_top_env = next->cctx->top_env; - coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); + if (ecb_expect_false (cctx_prev != cctx_current)) + { + cctx_prev->top_env = PL_top_env; + PL_top_env = cctx_current->top_env; + coro_transfer (&cctx_prev->cctx, &cctx_current->cctx); } - free_coro_mortal (); - - UNLOCK; + transfer_tail (aTHX); } } -struct transfer_args -{ - struct coro *prev, *next; - int flags; -}; +#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx)) +#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) + +/** high level stuff ********************************************************/ -#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags) +/* this function is actually Coro, not Coro::State, but we call it from here */ +/* because it is convenient - but it hasn't been declared yet for that reason */ +static void +coro_call_on_destroy (pTHX_ struct coro *coro); static void -coro_state_destroy (struct coro *coro) +coro_state_destroy (pTHX_ struct coro *coro) { - if (coro->refcnt--) + if (coro->flags & CF_ZOMBIE) return; - if (coro->flags & CF_RUNNING) - croak ("FATAL: tried to destroy currently running coroutine"); + slf_destroy (aTHX_ coro); - if (coro->mainstack && coro->mainstack != main_mainstack) - { - struct coro temp; + coro->flags |= CF_ZOMBIE; - SAVE ((&temp), TRANSFER_SAVE_ALL); - LOAD (coro); + if (coro->flags & CF_READY) + { + /* reduce nready, as destroying a ready coro effectively unreadies it */ + /* alternative: look through all ready queues and remove the coro */ + --coro_nready; + } + else + coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ - coro_destroy_stacks (); + if (coro->next) coro->next->prev = coro->prev; + if (coro->prev) coro->prev->next = coro->next; + if (coro == coro_first) coro_first = coro->next; + + if (coro->mainstack + && coro->mainstack != main_mainstack + && coro->slot + && !PL_dirty) + destroy_perl (aTHX_ coro); - LOAD ((&temp)); /* this will get rid of defsv etc.. */ + cctx_destroy (coro->cctx); + SvREFCNT_dec (coro->startcv); + SvREFCNT_dec (coro->args); + SvREFCNT_dec (coro->swap_sv); + SvREFCNT_dec (CORO_THROW); - coro->mainstack = 0; - } + coro_call_on_destroy (aTHX_ coro); - cctx_free (coro->cctx); - SvREFCNT_dec (coro->args); - Safefree (coro); + /* more destruction mayhem in coro_state_free */ } static int -coro_state_clear (pTHX_ SV *sv, MAGIC *mg) +coro_state_free (pTHX_ SV *sv, MAGIC *mg) { struct coro *coro = (struct coro *)mg->mg_ptr; mg->mg_ptr = 0; - coro_state_destroy (coro); + coro_state_destroy (aTHX_ coro); + SvREFCNT_dec (coro->on_destroy); + SvREFCNT_dec (coro->status); + + Safefree (coro); return 0; } -static int +static int ecb_cold coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) { - struct coro *coro = (struct coro *)mg->mg_ptr; - - ++coro->refcnt; + /* called when perl clones the current process the slow way (windows process emulation) */ + /* WE SIMply nuke the pointers in the copy, causing perl to croak */ + mg->mg_ptr = 0; + mg->mg_virtual = 0; return 0; } static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, - coro_state_clear, + coro_state_free, 0, #ifdef MGf_DUP coro_state_dup, @@ -815,375 +1849,2299 @@ #endif }; -static struct coro * -SvSTATE (SV *coro) +static void +prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv) { - HV *stash; - MAGIC *mg; + ta->prev = SvSTATE (prev_sv); + ta->next = SvSTATE (next_sv); + TRANSFER_CHECK (*ta); +} + +static void +api_transfer (pTHX_ SV *prev_sv, SV *next_sv) +{ + struct coro_transfer_args ta; + + prepare_transfer (aTHX_ &ta, prev_sv, next_sv); + TRANSFER (ta, 1); +} - if (SvROK (coro)) - coro = SvRV (coro); +/** Coro ********************************************************************/ + +ecb_inline void +coro_enq (pTHX_ struct coro *coro) +{ + struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN]; + + SvREFCNT_inc_NN (coro->hv); + + coro->next_ready = 0; + *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro; + ready [1] = coro; +} + +ecb_inline struct coro * +coro_deq (pTHX) +{ + int prio; - stash = SvSTASH (coro); - if (stash != coro_stash && stash != coro_state_stash) + for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; ) { - /* very slow, but rare, check */ - if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State")) - croak ("Coro::State object required"); + struct coro **ready = coro_ready [prio]; + + if (ready [0]) + { + struct coro *coro = ready [0]; + ready [0] = coro->next_ready; + return coro; + } } - mg = SvMAGIC (coro); - assert (mg->mg_type == PERL_MAGIC_ext); - return (struct coro *)mg->mg_ptr; + return 0; } static void -prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) +invoke_sv_ready_hook_helper (void) { - ta->prev = SvSTATE (prev); - ta->next = SvSTATE (next); - ta->flags = flags; + dTHX; + dSP; + + ENTER; + SAVETMPS; + + PUSHMARK (SP); + PUTBACK; + call_sv (coro_readyhook, G_VOID | G_DISCARD); + + FREETMPS; + LEAVE; } -static void -api_transfer (SV *prev, SV *next, int flags) +static int +api_ready (pTHX_ SV *coro_sv) { - dTHX; - struct transfer_args ta; + struct coro *coro = SvSTATE (coro_sv); + + if (coro->flags & CF_READY) + return 0; + + coro->flags |= CF_READY; - prepare_transfer (&ta, prev, next, flags); - TRANSFER (ta); + coro_enq (aTHX_ coro); + + if (!coro_nready++) + if (coroapi.readyhook) + coroapi.readyhook (); + + return 1; } -/** Coro ********************************************************************/ +static int +api_is_ready (pTHX_ SV *coro_sv) +{ + return !!(SvSTATE (coro_sv)->flags & CF_READY); +} + +/* expects to own a reference to next->hv */ +ecb_inline void +prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next) +{ + SV *prev_sv = SvRV (coro_current); -#define PRIO_MAX 3 -#define PRIO_HIGH 1 -#define PRIO_NORMAL 0 -#define PRIO_LOW -1 -#define PRIO_IDLE -3 -#define PRIO_MIN -4 + ta->prev = SvSTATE_hv (prev_sv); + ta->next = next; -/* for Coro.pm */ -static GV *coro_current, *coro_idle; -static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; -static int coro_nready; + TRANSFER_CHECK (*ta); + + SvRV_set (coro_current, (SV *)next->hv); + + free_coro_mortal (aTHX); + coro_mortal = prev_sv; +} static void -coro_enq (SV *coro_sv) +prepare_schedule (pTHX_ struct coro_transfer_args *ta) { - av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); - coro_nready++; + for (;;) + { + struct coro *next = coro_deq (aTHX); + + if (ecb_expect_true (next)) + { + /* cannot transfer to destroyed coros, skip and look for next */ + if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED))) + SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */ + else + { + next->flags &= ~CF_READY; + --coro_nready; + + prepare_schedule_to (aTHX_ ta, next); + break; + } + } + else + { + /* nothing to schedule: call the idle handler */ + if (SvROK (sv_idle) + && SvOBJECT (SvRV (sv_idle))) + { + if (SvRV (sv_idle) == SvRV (coro_current)) + { + require_pv ("Carp"); + + { + dSP; + + ENTER; + SAVETMPS; + + PUSHMARK (SP); + XPUSHs (sv_2mortal (newSVpv ("FATAL: $Coro::idle blocked itself - did you try to block inside an event loop callback? Caught", 0))); + PUTBACK; + call_pv ("Carp::confess", G_VOID | G_DISCARD); + + FREETMPS; + LEAVE; + } + } + + ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */ + api_ready (aTHX_ SvRV (sv_idle)); + --coro_nready; + } + else + { + /* TODO: deprecated, remove, cannot work reliably *//*D*/ + dSP; + + ENTER; + SAVETMPS; + + PUSHMARK (SP); + PUTBACK; + call_sv (sv_idle, G_VOID | G_DISCARD); + + FREETMPS; + LEAVE; + } + } + } } -static SV * -coro_deq (int min_prio) +ecb_inline void +prepare_cede (pTHX_ struct coro_transfer_args *ta) { - int prio = PRIO_MAX - PRIO_MIN; + api_ready (aTHX_ coro_current); + prepare_schedule (aTHX_ ta); +} - min_prio -= PRIO_MIN; - if (min_prio < 0) - min_prio = 0; +ecb_inline void +prepare_cede_notself (pTHX_ struct coro_transfer_args *ta) +{ + SV *prev = SvRV (coro_current); - for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) - if (AvFILLp (coro_ready [prio]) >= 0) - { - coro_nready--; - return av_shift (coro_ready [prio]); - } + if (coro_nready) + { + prepare_schedule (aTHX_ ta); + api_ready (aTHX_ prev); + } + else + prepare_nop (aTHX_ ta); +} - return 0; +static void +api_schedule (pTHX) +{ + struct coro_transfer_args ta; + + prepare_schedule (aTHX_ &ta); + TRANSFER (ta, 1); +} + +static void +api_schedule_to (pTHX_ SV *coro_sv) +{ + struct coro_transfer_args ta; + struct coro *next = SvSTATE (coro_sv); + + SvREFCNT_inc_NN (coro_sv); + prepare_schedule_to (aTHX_ &ta, next); } static int -api_ready (SV *coro_sv) +api_cede (pTHX) { - struct coro *coro; + struct coro_transfer_args ta; - if (SvROK (coro_sv)) - coro_sv = SvRV (coro_sv); + prepare_cede (aTHX_ &ta); - coro = SvSTATE (coro_sv); + if (ecb_expect_true (ta.prev != ta.next)) + { + TRANSFER (ta, 1); + return 1; + } + else + return 0; +} - if (coro->flags & CF_READY) +static int +api_cede_notself (pTHX) +{ + if (coro_nready) + { + struct coro_transfer_args ta; + + prepare_cede_notself (aTHX_ &ta); + TRANSFER (ta, 1); + return 1; + } + else return 0; +} + +static void +api_trace (pTHX_ SV *coro_sv, int flags) +{ + struct coro *coro = SvSTATE (coro_sv); if (coro->flags & CF_RUNNING) - croak ("Coro::ready called on currently running coroutine"); + croak ("cannot enable tracing on a running coroutine, caught"); - coro->flags |= CF_READY; + if (flags & CC_TRACE) + { + if (!coro->cctx) + coro->cctx = cctx_new_run (); + else if (!(coro->cctx->flags & CC_TRACE)) + croak ("cannot enable tracing on coroutine with custom stack, caught"); - LOCK; - coro_enq (SvREFCNT_inc (coro_sv)); - UNLOCK; + coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); + } + else if (coro->cctx && coro->cctx->flags & CC_TRACE) + { + coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL); - return 1; + if (coro->flags & CF_RUNNING) + PL_runops = RUNOPS_DEFAULT; + else + coro->slot->runops = RUNOPS_DEFAULT; + } +} + +static void +coro_push_av (pTHX_ AV *av, I32 gimme_v) +{ + if (AvFILLp (av) >= 0 && gimme_v != G_VOID) + { + dSP; + + if (gimme_v == G_SCALAR) + XPUSHs (AvARRAY (av)[AvFILLp (av)]); + else + { + int i; + EXTEND (SP, AvFILLp (av) + 1); + + for (i = 0; i <= AvFILLp (av); ++i) + PUSHs (AvARRAY (av)[i]); + } + + PUTBACK; + } +} + +static void +coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb) +{ + if (!coro->on_destroy) + coro->on_destroy = newAV (); + + av_push (coro->on_destroy, cb); +} + +static void +slf_destroy_join (pTHX_ struct CoroSLF *frame) +{ + SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv); } static int -api_is_ready (SV *coro_sv) +slf_check_join (pTHX_ struct CoroSLF *frame) +{ + struct coro *coro = (struct coro *)frame->data; + + if (!coro->status) + return 1; + + frame->destroy = 0; + + coro_push_av (aTHX_ coro->status, GIMME_V); + + SvREFCNT_dec ((SV *)coro->hv); + + return 0; +} + +static void +slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items) { - return !!SvSTATE (coro_sv)->flags & CF_READY; + struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef); + + if (items > 1) + croak ("join called with too many arguments"); + + if (coro->status) + frame->prepare = prepare_nop; + else + { + coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current))); + frame->prepare = prepare_schedule; + } + + frame->check = slf_check_join; + frame->destroy = slf_destroy_join; + frame->data = (void *)coro; + SvREFCNT_inc (coro->hv); } static void -prepare_schedule (struct transfer_args *ta) +coro_call_on_destroy (pTHX_ struct coro *coro) { - SV *current, *prev, *next; + AV *od = coro->on_destroy; + + if (!od) + return; - current = GvSV (coro_current); + coro->on_destroy = 0; + sv_2mortal ((SV *)od); - for (;;) + while (AvFILLp (od) >= 0) { - LOCK; - next = coro_deq (PRIO_MIN); - UNLOCK; + SV *cb = sv_2mortal (av_pop (od)); - if (next) - break; + /* coro hv's (and only hv's at the moment) are supported as well */ + if (SvSTATEhv_p (aTHX_ cb)) + api_ready (aTHX_ cb); + else + { + dSP; /* don't disturb outer sp */ + PUSHMARK (SP); + + if (coro->status) + { + PUTBACK; + coro_push_av (aTHX_ coro->status, G_ARRAY); + SPAGAIN; + } + + PUTBACK; + call_sv (cb, G_VOID | G_DISCARD); + } + } +} + +static void +coro_set_status (pTHX_ struct coro *coro, SV **arg, int items) +{ + AV *av; + + if (coro->status) + { + av = coro->status; + av_clear (av); + } + else + av = coro->status = newAV (); + + /* items are actually not so common, so optimise for this case */ + if (items) + { + int i; + + av_extend (av, items - 1); + + for (i = 0; i < items; ++i) + av_push (av, SvREFCNT_inc_NN (arg [i])); + } +} + +static void +slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv) +{ + av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */ + api_ready (aTHX_ sv_manager); + + frame->prepare = prepare_schedule; + frame->check = slf_check_repeat; + + /* as a minor optimisation, we could unwind all stacks here */ + /* but that puts extra pressure on pp_slf, and is not worth much */ + /*coro_unwind_stacks (aTHX);*/ +} + +static void +slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items) +{ + HV *coro_hv = (HV *)SvRV (coro_current); + + coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items); + slf_init_terminate_cancel_common (aTHX_ frame, coro_hv); +} + +static void +slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items) +{ + HV *coro_hv; + struct coro *coro; + + if (items <= 0) + croak ("Coro::cancel called without coro object,"); + + coro = SvSTATE (arg [0]); + coro_hv = coro->hv; + + coro_set_status (aTHX_ coro, arg + 1, items - 1); + + if (ecb_expect_false (coro->flags & CF_NOCANCEL)) + { + /* coro currently busy cancelling something, so just notify it */ + coro->slf_frame.data = (void *)coro; + + frame->prepare = prepare_nop; + frame->check = slf_check_nop; + } + else if (coro_hv == (HV *)SvRV (coro_current)) + { + /* cancelling the current coro is allowed, and equals terminate */ + slf_init_terminate_cancel_common (aTHX_ frame, coro_hv); + } + else + { + struct coro *self = SvSTATE_current; + + if (!self) + croak ("Coro::cancel called outside of thread content,"); + + /* otherwise we cancel directly, purely for speed reasons + * unfortunately, this requires some magic trickery, as + * somebody else could cancel us, so we have to fight the cancellation. + * this is ugly, and hopefully fully worth the extra speed. + * besides, I can't get the slow-but-safe version working... + */ + slf_frame.data = 0; + self->flags |= CF_NOCANCEL; + coro_state_destroy (aTHX_ coro); + self->flags &= ~CF_NOCANCEL; + + if (slf_frame.data) + { + /* while we were busy we have been cancelled, so terminate */ + slf_init_terminate_cancel_common (aTHX_ frame, self->hv); + } + else + { + frame->prepare = prepare_nop; + frame->check = slf_check_nop; + } + } +} + +static int +slf_check_safe_cancel (pTHX_ struct CoroSLF *frame) +{ + frame->prepare = 0; + coro_unwind_stacks (aTHX); + + slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current)); + + return 1; +} + +static int +safe_cancel (pTHX_ struct coro *coro, SV **arg, int items) +{ + if (coro->cctx) + croak ("coro inside C callback, unable to cancel at this time, caught"); + + if (coro->flags & CF_NEW) + { + coro_set_status (aTHX_ coro, arg, items); + coro_state_destroy (aTHX_ coro); + } + else + { + if (!coro->slf_frame.prepare) + croak ("coro outside an SLF function, unable to cancel at this time, caught"); + + slf_destroy (aTHX_ coro); + + coro_set_status (aTHX_ coro, arg, items); + coro->slf_frame.prepare = prepare_nop; + coro->slf_frame.check = slf_check_safe_cancel; + + api_ready (aTHX_ (SV *)coro->hv); + } + + return 1; +} + +/*****************************************************************************/ +/* async pool handler */ + +static int +slf_check_pool_handler (pTHX_ struct CoroSLF *frame) +{ + HV *hv = (HV *)SvRV (coro_current); + struct coro *coro = (struct coro *)frame->data; + + if (!coro->invoke_cb) + return 1; /* loop till we have invoke */ + else + { + hv_store (hv, "desc", sizeof ("desc") - 1, + newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); + + coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv); { dSP; + XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0; + PUTBACK; + } - ENTER; - SAVETMPS; + SvREFCNT_dec (GvAV (PL_defgv)); + GvAV (PL_defgv) = coro->invoke_av; + coro->invoke_av = 0; - PUSHMARK (SP); - PUTBACK; - call_sv (GvSV (coro_idle), G_DISCARD); + return 0; + } +} + +static void +slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items) +{ + HV *hv = (HV *)SvRV (coro_current); + struct coro *coro = SvSTATE_hv ((SV *)hv); + + if (ecb_expect_true (coro->saved_deffh)) + { + /* subsequent iteration */ + SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh; + coro->saved_deffh = 0; + + if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss) + || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size)) + { + slf_init_terminate_cancel_common (aTHX_ frame, hv); + return; + } + else + { + av_clear (GvAV (PL_defgv)); + hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0); + + if (ecb_expect_false (coro->swap_sv)) + { + swap_svs_leave (coro); + SvREFCNT_dec_NN (coro->swap_sv); + coro->swap_sv = 0; + } - FREETMPS; - LEAVE; + coro->prio = 0; + + if (ecb_expect_false (coro->cctx) && ecb_expect_false (coro->cctx->flags & CC_TRACE)) + api_trace (aTHX_ coro_current, 0); + + frame->prepare = prepare_schedule; + av_push (av_async_pool, SvREFCNT_inc (hv)); + } + } + else + { + /* first iteration, simply fall through */ + frame->prepare = prepare_nop; + } + + frame->check = slf_check_pool_handler; + frame->data = (void *)coro; +} + +/*****************************************************************************/ +/* rouse callback */ + +#define CORO_MAGIC_type_rouse PERL_MAGIC_ext + +static void +coro_rouse_callback (pTHX_ CV *cv) +{ + dXSARGS; + SV *data = (SV *)S_GENSUB_ARG; + + if (SvTYPE (SvRV (data)) != SVt_PVAV) + { + /* first call, set args */ + SV *coro = SvRV (data); + AV *av = newAV (); + + SvRV_set (data, (SV *)av); + + /* better take a full copy of the arguments */ + while (items--) + av_store (av, items, newSVsv (ST (items))); + + api_ready (aTHX_ coro); + SvREFCNT_dec (coro); + } + + XSRETURN_EMPTY; +} + +static int +slf_check_rouse_wait (pTHX_ struct CoroSLF *frame) +{ + SV *data = (SV *)frame->data; + + if (CORO_THROW) + return 0; + + if (SvTYPE (SvRV (data)) != SVt_PVAV) + return 1; + + /* now push all results on the stack */ + { + dSP; + AV *av = (AV *)SvRV (data); + int i; + + EXTEND (SP, AvFILLp (av) + 1); + for (i = 0; i <= AvFILLp (av); ++i) + PUSHs (sv_2mortal (AvARRAY (av)[i])); + + /* we have stolen the elements, so set length to zero and free */ + AvFILLp (av) = -1; + av_undef (av); + + PUTBACK; + } + + return 0; +} + +static void +slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items) +{ + SV *cb; + + if (items) + cb = arg [0]; + else + { + struct coro *coro = SvSTATE_current; + + if (!coro->rouse_cb) + croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,"); + + cb = sv_2mortal (coro->rouse_cb); + coro->rouse_cb = 0; + } + + if (!SvROK (cb) + || SvTYPE (SvRV (cb)) != SVt_PVCV + || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback) + croak ("Coro::rouse_wait called with illegal callback argument,"); + + { + CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */ + SV *data = (SV *)S_GENSUB_ARG; + + frame->data = (void *)data; + frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule; + frame->check = slf_check_rouse_wait; + } +} + +static SV * +coro_new_rouse_cb (pTHX) +{ + HV *hv = (HV *)SvRV (coro_current); + struct coro *coro = SvSTATE_hv (hv); + SV *data = newRV_inc ((SV *)hv); + SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data); + + sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0); + SvREFCNT_dec (data); /* magicext increases the refcount */ + + SvREFCNT_dec (coro->rouse_cb); + coro->rouse_cb = SvREFCNT_inc_NN (cb); + + return cb; +} + +/*****************************************************************************/ +/* schedule-like-function opcode (SLF) */ + +static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */ +static const CV *slf_cv; +static SV **slf_argv; +static int slf_argc, slf_arga; /* count, allocated */ +static I32 slf_ax; /* top of stack, for restore */ + +/* this restores the stack in the case we patched the entersub, to */ +/* recreate the stack frame as perl will on following calls */ +/* since entersub cleared the stack */ +static OP * +pp_restore (pTHX) +{ + int i; + SV **SP = PL_stack_base + slf_ax; + + PUSHMARK (SP); + + EXTEND (SP, slf_argc + 1); + + for (i = 0; i < slf_argc; ++i) + PUSHs (sv_2mortal (slf_argv [i])); + + PUSHs ((SV *)CvGV (slf_cv)); + + RETURNOP (slf_restore.op_first); +} + +static void +slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta) +{ + SV **arg = (SV **)slf_frame.data; + + prepare_transfer (aTHX_ ta, arg [0], arg [1]); +} + +static void +slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items) +{ + if (items != 2) + croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items); + + frame->prepare = slf_prepare_transfer; + frame->check = slf_check_nop; + frame->data = (void *)arg; /* let's hope it will stay valid */ +} + +static void +slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items) +{ + frame->prepare = prepare_schedule; + frame->check = slf_check_nop; +} + +static void +slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta) +{ + struct coro *next = (struct coro *)slf_frame.data; + + SvREFCNT_inc_NN (next->hv); + prepare_schedule_to (aTHX_ ta, next); +} + +static void +slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items) +{ + if (!items) + croak ("Coro::schedule_to expects a coroutine argument, caught"); + + frame->data = (void *)SvSTATE (arg [0]); + frame->prepare = slf_prepare_schedule_to; + frame->check = slf_check_nop; +} + +static void +slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items) +{ + api_ready (aTHX_ SvRV (coro_current)); + + slf_init_schedule_to (aTHX_ frame, cv, arg, items); +} + +static void +slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items) +{ + frame->prepare = prepare_cede; + frame->check = slf_check_nop; +} + +static void +slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items) +{ + frame->prepare = prepare_cede_notself; + frame->check = slf_check_nop; +} + +/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */ +static void +slf_destroy (pTHX_ struct coro *coro) +{ + struct CoroSLF frame = coro->slf_frame; + + /* + * The on_destroy below most likely is from an SLF call. + * Since by definition the SLF call will not finish when we destroy + * the coro, we will have to force-finish it here, otherwise + * cleanup functions cannot call SLF functions. + */ + coro->slf_frame.prepare = 0; + + /* this callback is reserved for slf functions needing to do cleanup */ + if (frame.destroy && frame.prepare && !PL_dirty) + frame.destroy (aTHX_ &frame); +} + +/* + * these not obviously related functions are all rolled into one + * function to increase chances that they all will call transfer with the same + * stack offset + * SLF stands for "schedule-like-function". + */ +static OP * +pp_slf (pTHX) +{ + I32 checkmark; /* mark SP to see how many elements check has pushed */ + + /* set up the slf frame, unless it has already been set-up */ + /* the latter happens when a new coro has been started */ + /* or when a new cctx was attached to an existing coroutine */ + if (ecb_expect_true (!slf_frame.prepare)) + { + /* first iteration */ + dSP; + SV **arg = PL_stack_base + TOPMARK + 1; + int items = SP - arg; /* args without function object */ + SV *gv = *sp; + + /* do a quick consistency check on the "function" object, and if it isn't */ + /* for us, divert to the real entersub */ + if (SvTYPE (gv) != SVt_PVGV + || !GvCV (gv) + || !(CvFLAGS (GvCV (gv)) & CVf_SLF)) + return PL_ppaddr[OP_ENTERSUB](aTHX); + + if (!(PL_op->op_flags & OPf_STACKED)) + { + /* ampersand-form of call, use @_ instead of stack */ + AV *av = GvAV (PL_defgv); + arg = AvARRAY (av); + items = AvFILLp (av) + 1; + } + + /* now call the init function, which needs to set up slf_frame */ + ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr) + (aTHX_ &slf_frame, GvCV (gv), arg, items); + + /* pop args */ + SP = PL_stack_base + POPMARK; + + PUTBACK; + } + + /* now that we have a slf_frame, interpret it! */ + /* we use a callback system not to make the code needlessly */ + /* complicated, but so we can run multiple perl coros from one cctx */ + + do + { + struct coro_transfer_args ta; + + slf_frame.prepare (aTHX_ &ta); + TRANSFER (ta, 0); + + checkmark = PL_stack_sp - PL_stack_base; + } + while (slf_frame.check (aTHX_ &slf_frame)); + + slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */ + + /* exception handling */ + if (ecb_expect_false (CORO_THROW)) + { + SV *exception = sv_2mortal (CORO_THROW); + + CORO_THROW = 0; + sv_setsv (ERRSV, exception); + croak (0); + } + + /* return value handling - mostly like entersub */ + /* make sure we put something on the stack in scalar context */ + if (GIMME_V == G_SCALAR + && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1)) + { + dSP; + SV **bot = PL_stack_base + checkmark; + + if (sp == bot) /* too few, push undef */ + bot [1] = &PL_sv_undef; + else /* too many, take last one */ + bot [1] = *sp; + + SP = bot + 1; + + PUTBACK; + } + + return NORMAL; +} + +static void +api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax) +{ + int i; + SV **arg = PL_stack_base + ax; + int items = PL_stack_sp - arg + 1; + + assert (("FATAL: SLF call with illegal CV value", !CvANON (cv))); + + if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB] + && PL_op->op_ppaddr != pp_slf) + croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught"); + + CvFLAGS (cv) |= CVf_SLF; + CvXSUBANY (cv).any_ptr = (void *)init_cb; + slf_cv = cv; + + /* we patch the op, and then re-run the whole call */ + /* we have to put the same argument on the stack for this to work */ + /* and this will be done by pp_restore */ + slf_restore.op_next = (OP *)&slf_restore; + slf_restore.op_type = OP_CUSTOM; + slf_restore.op_ppaddr = pp_restore; + slf_restore.op_first = PL_op; + + slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */ + + if (PL_op->op_flags & OPf_STACKED) + { + if (items > slf_arga) + { + slf_arga = items; + Safefree (slf_argv); + New (0, slf_argv, slf_arga, SV *); + } + + slf_argc = items; + + for (i = 0; i < items; ++i) + slf_argv [i] = SvREFCNT_inc (arg [i]); + } + else + slf_argc = 0; + + PL_op->op_ppaddr = pp_slf; + /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */ + + PL_op = (OP *)&slf_restore; +} + +/*****************************************************************************/ +/* dynamic wind */ + +static void +on_enterleave_call (pTHX_ SV *cb) +{ + dSP; + + PUSHSTACK; + + PUSHMARK (SP); + PUTBACK; + call_sv (cb, G_VOID | G_DISCARD); + SPAGAIN; + + POPSTACK; +} + +static SV * +coro_avp_pop_and_free (pTHX_ AV **avp) +{ + AV *av = *avp; + SV *res = av_pop (av); + + if (AvFILLp (av) < 0) + { + *avp = 0; + SvREFCNT_dec (av); + } + + return res; +} + +static void +coro_pop_on_enter (pTHX_ void *coro) +{ + SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter); + SvREFCNT_dec (cb); +} + +static void +coro_pop_on_leave (pTHX_ void *coro) +{ + SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave); + on_enterleave_call (aTHX_ sv_2mortal (cb)); +} + +static void +enterleave_hook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, void *arg) +{ + if (!hook) + return; + + if (!*avp) + { + *avp = newAV (); + AvREAL_off (*avp); + } + + av_push (*avp, (SV *)hook); + av_push (*avp, (SV *)arg); +} + +static void +enterleave_unhook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, int execute) +{ + AV *av = *avp; + int i; + + if (!av) + return; + + for (i = AvFILLp (av) - 1; i >= 0; i -= 2) + if (AvARRAY (av)[i] == (SV *)hook) + { + if (execute) + hook (aTHX_ (void *)AvARRAY (av)[i + 1]); + + memmove (AvARRAY (av) + i, AvARRAY (av) + i + 2, AvFILLp (av) - i - 1); + av_pop (av); + av_pop (av); + break; } + + if (AvFILLp (av) >= 0) + { + *avp = 0; + SvREFCNT_dec_NN (av); } +} - prev = SvRV (current); - SvRV (current) = next; +static void +api_enterleave_hook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg) +{ + struct coro *coro = SvSTATE (coro_sv); - /* free this only after the transfer */ - LOCK; - free_coro_mortal (); - UNLOCK; - coro_mortal = prev; + if (SvSTATE_current == coro) + if (enter) + enter (aTHX_ enter_arg); - ta->prev = SvSTATE (prev); - ta->next = SvSTATE (next); - ta->flags = TRANSFER_SAVE_ALL; + enterleave_hook_xs (aTHX_ coro, &coro->on_enter_xs, enter, enter_arg); + enterleave_hook_xs (aTHX_ coro, &coro->on_leave_xs, leave, leave_arg); +} - ta->next->flags &= ~CF_READY; +static void +api_enterleave_unhook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, coro_enterleave_hook leave) +{ + struct coro *coro = SvSTATE (coro_sv); + + enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0); + enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, SvSTATE_current == coro); } static void -prepare_cede (struct transfer_args *ta) +savedestructor_unhook_enter (pTHX_ coro_enterleave_hook enter) { - api_ready (GvSV (coro_current)); + struct coro *coro = SvSTATE_current; - prepare_schedule (ta); + enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0); } static void -api_schedule (void) +savedestructor_unhook_leave (pTHX_ coro_enterleave_hook leave) { - dTHX; - struct transfer_args ta; + struct coro *coro = SvSTATE_current; - prepare_schedule (&ta); - TRANSFER (ta); + enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, 1); } static void -api_cede (void) +api_enterleave_scope_hook (pTHX_ coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg) { - dTHX; - struct transfer_args ta; + api_enterleave_hook (aTHX_ coro_current, enter, enter_arg, leave, leave_arg); + + /* this ought to be much cheaper than malloc + a single destructor call */ + if (enter) SAVEDESTRUCTOR_X (savedestructor_unhook_enter, enter); + if (leave) SAVEDESTRUCTOR_X (savedestructor_unhook_leave, leave); +} + +/*****************************************************************************/ +/* PerlIO::cede */ + +typedef struct +{ + PerlIOBuf base; + NV next, every; +} PerlIOCede; + +static IV ecb_cold +PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab) +{ + PerlIOCede *self = PerlIOSelf (f, PerlIOCede); + + self->every = SvCUR (arg) ? SvNV (arg) : 0.01; + self->next = nvtime () + self->every; + + return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab); +} + +static SV * ecb_cold +PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags) +{ + PerlIOCede *self = PerlIOSelf (f, PerlIOCede); + + return newSVnv (self->every); +} + +static IV +PerlIOCede_flush (pTHX_ PerlIO *f) +{ + PerlIOCede *self = PerlIOSelf (f, PerlIOCede); + double now = nvtime (); + + if (now >= self->next) + { + api_cede (aTHX); + self->next = now + self->every; + } + + return PerlIOBuf_flush (aTHX_ f); +} + +static PerlIO_funcs PerlIO_cede = +{ + sizeof(PerlIO_funcs), + "cede", + sizeof(PerlIOCede), + PERLIO_K_DESTRUCT | PERLIO_K_RAW, + PerlIOCede_pushed, + PerlIOBuf_popped, + PerlIOBuf_open, + PerlIOBase_binmode, + PerlIOCede_getarg, + PerlIOBase_fileno, + PerlIOBuf_dup, + PerlIOBuf_read, + PerlIOBuf_unread, + PerlIOBuf_write, + PerlIOBuf_seek, + PerlIOBuf_tell, + PerlIOBuf_close, + PerlIOCede_flush, + PerlIOBuf_fill, + PerlIOBase_eof, + PerlIOBase_error, + PerlIOBase_clearerr, + PerlIOBase_setlinebuf, + PerlIOBuf_get_base, + PerlIOBuf_bufsiz, + PerlIOBuf_get_ptr, + PerlIOBuf_get_cnt, + PerlIOBuf_set_ptrcnt, +}; + +/*****************************************************************************/ +/* Coro::Semaphore & Coro::Signal */ + +static SV * +coro_waitarray_new (pTHX_ int count) +{ + /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */ + AV *av = newAV (); + SV **ary; + + /* unfortunately, building manually saves memory */ + Newx (ary, 2, SV *); + AvALLOC (av) = ary; +#if PERL_VERSION_ATLEAST (5,10,0) + AvARRAY (av) = ary; +#else + /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */ + /* -DDEBUGGING flags this as a bug, despite it perfectly working */ + SvPVX ((SV *)av) = (char *)ary; +#endif + AvMAX (av) = 1; + AvFILLp (av) = 0; + ary [0] = newSViv (count); + + return newRV_noinc ((SV *)av); +} + +/* semaphore */ + +static void +coro_semaphore_adjust (pTHX_ AV *av, IV adjust) +{ + SV *count_sv = AvARRAY (av)[0]; + IV count = SvIVX (count_sv); + + count += adjust; + SvIVX (count_sv) = count; + + /* now wake up as many waiters as are expected to lock */ + while (count > 0 && AvFILLp (av) > 0) + { + SV *cb; + + /* swap first two elements so we can shift a waiter */ + AvARRAY (av)[0] = AvARRAY (av)[1]; + AvARRAY (av)[1] = count_sv; + cb = av_shift (av); + + if (SvOBJECT (cb)) + { + api_ready (aTHX_ cb); + --count; + } + else if (SvTYPE (cb) == SVt_PVCV) + { + dSP; + PUSHMARK (SP); + XPUSHs (sv_2mortal (newRV_inc ((SV *)av))); + PUTBACK; + call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR); + } + + SvREFCNT_dec_NN (cb); + } +} + +static void +coro_semaphore_destroy (pTHX_ struct CoroSLF *frame) +{ + /* call $sem->adjust (0) to possibly wake up some other waiters */ + coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0); +} + +static int +slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire) +{ + AV *av = (AV *)frame->data; + SV *count_sv = AvARRAY (av)[0]; + SV *coro_hv = SvRV (coro_current); + + frame->destroy = 0; + + /* if we are about to throw, don't actually acquire the lock, just throw */ + if (ecb_expect_false (CORO_THROW)) + { + /* we still might be responsible for the semaphore, so wake up others */ + coro_semaphore_adjust (aTHX_ av, 0); + + return 0; + } + else if (SvIVX (count_sv) > 0) + { + if (acquire) + SvIVX (count_sv) = SvIVX (count_sv) - 1; + else + coro_semaphore_adjust (aTHX_ av, 0); + + return 0; + } + else + { + int i; + /* if we were woken up but can't down, we look through the whole */ + /* waiters list and only add us if we aren't in there already */ + /* this avoids some degenerate memory usage cases */ + for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */ + if (AvARRAY (av)[i] == coro_hv) + return 1; + + av_push (av, SvREFCNT_inc (coro_hv)); + return 1; + } +} + +static int +slf_check_semaphore_down (pTHX_ struct CoroSLF *frame) +{ + return slf_check_semaphore_down_or_wait (aTHX_ frame, 1); +} + +static int +slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame) +{ + return slf_check_semaphore_down_or_wait (aTHX_ frame, 0); +} + +static void +slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items) +{ + AV *av = (AV *)SvRV (arg [0]); + + if (SvIVX (AvARRAY (av)[0]) > 0) + { + frame->data = (void *)av; + frame->prepare = prepare_nop; + } + else + { + av_push (av, SvREFCNT_inc (SvRV (coro_current))); + + frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av)); + frame->prepare = prepare_schedule; + /* to avoid race conditions when a woken-up coro gets terminated */ + /* we arrange for a temporary on_destroy that calls adjust (0) */ + frame->destroy = coro_semaphore_destroy; + } +} + +static void +slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items) +{ + slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items); + frame->check = slf_check_semaphore_down; +} + +static void +slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items) +{ + if (items >= 2) + { + /* callback form */ + AV *av = (AV *)SvRV (arg [0]); + SV *cb_cv = s_get_cv_croak (arg [1]); + + av_push (av, SvREFCNT_inc_NN (cb_cv)); + + if (SvIVX (AvARRAY (av)[0]) > 0) + coro_semaphore_adjust (aTHX_ av, 0); + + frame->prepare = prepare_nop; + frame->check = slf_check_nop; + } + else + { + slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items); + frame->check = slf_check_semaphore_wait; + } +} + +/* signal */ + +static void +coro_signal_wake (pTHX_ AV *av, int count) +{ + SvIVX (AvARRAY (av)[0]) = 0; + + /* now signal count waiters */ + while (count > 0 && AvFILLp (av) > 0) + { + SV *cb; + + /* swap first two elements so we can shift a waiter */ + cb = AvARRAY (av)[0]; + AvARRAY (av)[0] = AvARRAY (av)[1]; + AvARRAY (av)[1] = cb; + + cb = av_shift (av); + + if (SvTYPE (cb) == SVt_PVCV) + { + dSP; + PUSHMARK (SP); + XPUSHs (sv_2mortal (newRV_inc ((SV *)av))); + PUTBACK; + call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR); + } + else + { + api_ready (aTHX_ cb); + sv_setiv (cb, 0); /* signal waiter */ + } + + SvREFCNT_dec_NN (cb); + + --count; + } +} + +static int +slf_check_signal_wait (pTHX_ struct CoroSLF *frame) +{ + /* if we are about to throw, also stop waiting */ + return SvROK ((SV *)frame->data) && !CORO_THROW; +} + +static void +slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items) +{ + AV *av = (AV *)SvRV (arg [0]); + + if (items >= 2) + { + SV *cb_cv = s_get_cv_croak (arg [1]); + av_push (av, SvREFCNT_inc_NN (cb_cv)); + + if (SvIVX (AvARRAY (av)[0])) + coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */ + + frame->prepare = prepare_nop; + frame->check = slf_check_nop; + } + else if (SvIVX (AvARRAY (av)[0])) + { + SvIVX (AvARRAY (av)[0]) = 0; + frame->prepare = prepare_nop; + frame->check = slf_check_nop; + } + else + { + SV *waiter = newSVsv (coro_current); /* owned by signal av */ + + av_push (av, waiter); + + frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */ + frame->prepare = prepare_schedule; + frame->check = slf_check_signal_wait; + } +} + +/*****************************************************************************/ +/* Coro::AIO */ + +#define CORO_MAGIC_type_aio PERL_MAGIC_ext + +/* helper storage struct */ +struct io_state +{ + int errorno; + I32 laststype; /* U16 in 5.10.0 */ + int laststatval; + Stat_t statcache; +}; + +static void +coro_aio_callback (pTHX_ CV *cv) +{ + dXSARGS; + AV *state = (AV *)S_GENSUB_ARG; + SV *coro = av_pop (state); + SV *data_sv = newSV (sizeof (struct io_state)); + + av_extend (state, items - 1); + + sv_upgrade (data_sv, SVt_PV); + SvCUR_set (data_sv, sizeof (struct io_state)); + SvPOK_only (data_sv); + + { + struct io_state *data = (struct io_state *)SvPVX (data_sv); + + data->errorno = errno; + data->laststype = PL_laststype; + data->laststatval = PL_laststatval; + data->statcache = PL_statcache; + } + + /* now build the result vector out of all the parameters and the data_sv */ + { + int i; + + for (i = 0; i < items; ++i) + av_push (state, SvREFCNT_inc_NN (ST (i))); + } + + av_push (state, data_sv); + + api_ready (aTHX_ coro); + SvREFCNT_dec_NN (coro); + SvREFCNT_dec_NN ((AV *)state); +} + +static int +slf_check_aio_req (pTHX_ struct CoroSLF *frame) +{ + AV *state = (AV *)frame->data; + + /* if we are about to throw, return early */ + /* this does not cancel the aio request, but at least */ + /* it quickly returns */ + if (CORO_THROW) + return 0; + + /* one element that is an RV? repeat! */ + if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV) + return 1; + + /* restore status */ + { + SV *data_sv = av_pop (state); + struct io_state *data = (struct io_state *)SvPVX (data_sv); + + errno = data->errorno; + PL_laststype = data->laststype; + PL_laststatval = data->laststatval; + PL_statcache = data->statcache; + + SvREFCNT_dec_NN (data_sv); + } + + /* push result values */ + { + dSP; + int i; + + EXTEND (SP, AvFILLp (state) + 1); + for (i = 0; i <= AvFILLp (state); ++i) + PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i]))); + + PUTBACK; + } + + return 0; +} + +static void +slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items) +{ + AV *state = (AV *)sv_2mortal ((SV *)newAV ()); + SV *coro_hv = SvRV (coro_current); + struct coro *coro = SvSTATE_hv (coro_hv); + + /* put our coroutine id on the state arg */ + av_push (state, SvREFCNT_inc_NN (coro_hv)); + + /* first see whether we have a non-zero priority and set it as AIO prio */ + if (coro->prio) + { + dSP; + + static SV *prio_cv; + static SV *prio_sv; + + if (ecb_expect_false (!prio_cv)) + { + prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0); + prio_sv = newSViv (0); + } + + PUSHMARK (SP); + sv_setiv (prio_sv, coro->prio); + XPUSHs (prio_sv); + + PUTBACK; + call_sv (prio_cv, G_VOID | G_DISCARD); + } + + /* now call the original request */ + { + dSP; + CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj; + int i; + + PUSHMARK (SP); + + /* first push all args to the stack */ + EXTEND (SP, items + 1); + + for (i = 0; i < items; ++i) + PUSHs (arg [i]); + + /* now push the callback closure */ + PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state)))); + + /* now call the AIO function - we assume our request is uncancelable */ + PUTBACK; + call_sv ((SV *)req, G_VOID | G_DISCARD); + } + + /* now that the request is going, we loop till we have a result */ + frame->data = (void *)state; + frame->prepare = prepare_schedule; + frame->check = slf_check_aio_req; +} + +static void +coro_aio_req_xs (pTHX_ CV *cv) +{ + dXSARGS; + + CORO_EXECUTE_SLF_XS (slf_init_aio_req); + + XSRETURN_EMPTY; +} + +/*****************************************************************************/ + +#if CORO_CLONE +# include "clone.c" +#endif + +/*****************************************************************************/ + +static SV * +coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro) +{ + SV *coro_sv; + struct coro *coro; + MAGIC *mg; + HV *hv; + SV *cb; + int i; + + if (argc > 0) + { + cb = s_get_cv_croak (argv [0]); + + if (!is_coro) + { + if (CvISXSUB (cb)) + croak ("Coro::State doesn't support XS functions as coroutine start, caught"); + + if (!CvROOT (cb)) + croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught"); + } + } + + Newz (0, coro, 1, struct coro); + coro->args = newAV (); + coro->flags = CF_NEW; + + if (coro_first) coro_first->prev = coro; + coro->next = coro_first; + coro_first = coro; + + coro->hv = hv = newHV (); + mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0); + mg->mg_flags |= MGf_DUP; + coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash); + + if (argc > 0) + { + av_extend (coro->args, argc + is_coro - 1); + + if (is_coro) + { + av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb)); + cb = (SV *)cv_coro_run; + } + + coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb); + + for (i = 1; i < argc; i++) + av_push (coro->args, newSVsv (argv [i])); + } + + return coro_sv; +} + +#ifndef __cplusplus +ecb_cold XS(boot_Coro__State); +#endif + +#if CORO_JIT + +static void ecb_noinline ecb_cold +pushav_4uv (pTHX_ UV a, UV b, UV c, UV d) +{ + dSP; + AV *av = newAV (); + + av_store (av, 3, newSVuv (d)); + av_store (av, 2, newSVuv (c)); + av_store (av, 1, newSVuv (b)); + av_store (av, 0, newSVuv (a)); + + XPUSHs (sv_2mortal (newRV_noinc ((SV *)av))); + + PUTBACK; +} + +static void ecb_noinline ecb_cold +jit_init (pTHX) +{ + dSP; + SV *load, *save; + char *map_base; + char *load_ptr, *save_ptr; + STRLEN load_len, save_len, map_len; + int count; + + eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1); + + PUSHMARK (SP); + #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type)); + #include "state.h" + count = call_pv ("Coro::State::_jit", G_ARRAY); + SPAGAIN; + + save = POPs; save_ptr = SvPVbyte (save, save_len); + load = POPs; load_ptr = SvPVbyte (load, load_len); + + map_len = load_len + save_len + 16; + + map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); + + assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED)); + + load_perl_slots = (load_save_perl_slots_type)map_base; + memcpy (map_base, load_ptr, load_len); + + map_base += (load_len + 15) & ~15; + + save_perl_slots = (load_save_perl_slots_type)map_base; + memcpy (map_base, save_ptr, save_len); + + /* we are good citizens and try to make the page read-only, so the evil evil */ + /* hackers might have it a bit more difficult */ + mprotect (map_base, map_len, PROT_READ | PROT_EXEC); - prepare_cede (&ta); - TRANSFER (ta); + PUTBACK; + eval_pv ("undef &Coro::State::_jit", 1); } -MODULE = Coro::State PACKAGE = Coro::State +#endif + +MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ PROTOTYPES: DISABLE BOOT: { +#define VARx(name,expr,type) if (sizeof (type) < sizeof (expr)) croak ("FATAL: Coro thread context slot '" # name "' too small for this version of perl."); +#include "state.h" #ifdef USE_ITHREADS - MUTEX_INIT (&coro_mutex); +# if CORO_PTHREAD + coro_thx = PERL_GET_CONTEXT; +# endif #endif - BOOT_PAGESIZE; + /* perl defines these to check for existance first, but why it doesn't */ + /* just create them one at init time is not clear to me, except for */ + /* programs trying to delete them, but... */ + /* anyway, we declare this as invalid and make sure they are initialised here */ + DEFSV; + ERRSV; + + cctx_current = cctx_new_empty (); + + irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); + stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); + + orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get; + orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set; + orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr; + + rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV)); + rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV)); coro_state_stash = gv_stashpv ("Coro::State", TRUE); - newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); - newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); - newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); + newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE)); + newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB)); + newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE)); + newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL)); main_mainstack = PL_mainstack; + main_top_env = PL_top_env; + + while (main_top_env->je_prev) + main_top_env = main_top_env->je_prev; - coroapi.ver = CORO_API_VERSION; - coroapi.transfer = api_transfer; + { + SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf))); - assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); + if (!PL_custom_op_names) PL_custom_op_names = newHV (); + hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0); + + if (!PL_custom_op_descs) PL_custom_op_descs = newHV (); + hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0); + } + + coroapi.ver = CORO_API_VERSION; + coroapi.rev = CORO_API_REVISION; + + coroapi.transfer = api_transfer; + + coroapi.sv_state = SvSTATE_; + coroapi.execute_slf = api_execute_slf; + coroapi.prepare_nop = prepare_nop; + coroapi.prepare_schedule = prepare_schedule; + coroapi.prepare_cede = prepare_cede; + coroapi.prepare_cede_notself = prepare_cede_notself; + + time_init (aTHX); + + assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL)); +#if CORO_JIT + PUTBACK; + jit_init (aTHX); + SPAGAIN; +#endif } SV * -new (char *klass, ...) +new (SV *klass, ...) + ALIAS: + Coro::new = 1 CODE: + RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix); + OUTPUT: + RETVAL + +void +transfer (...) + PROTOTYPE: $$ + CODE: + CORO_EXECUTE_SLF_XS (slf_init_transfer); + +SV * +clone (Coro::State coro) + CODE: { - struct coro *coro; - HV *hv; - int i; +#if CORO_CLONE + struct coro *ncoro = coro_clone (aTHX_ coro); + MAGIC *mg; + /* TODO: too much duplication */ + ncoro->hv = newHV (); + mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0); + mg->mg_flags |= MGf_DUP; + RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv)); +#else + croak ("Coro::State->clone has not been configured into this installation of Coro, realised"); +#endif +} + OUTPUT: + RETVAL - Newz (0, coro, 1, struct coro); - coro->args = newAV (); +int +cctx_stacksize (int new_stacksize = 0) + PROTOTYPE: ;$ + CODE: + RETVAL = cctx_stacksize; + if (new_stacksize) + { + cctx_stacksize = new_stacksize; + ++cctx_gen; + } + OUTPUT: + RETVAL - hv = newHV (); - sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; - RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); +int +cctx_max_idle (int max_idle = 0) + PROTOTYPE: ;$ + CODE: + RETVAL = cctx_max_idle; + if (max_idle > 1) + cctx_max_idle = max_idle; + OUTPUT: + RETVAL - for (i = 1; i < items; i++) - av_push (coro->args, newSVsv (ST (i))); -} - OUTPUT: +int +cctx_count () + PROTOTYPE: + CODE: + RETVAL = cctx_count; + OUTPUT: + RETVAL + +int +cctx_idle () + PROTOTYPE: + CODE: + RETVAL = cctx_idle; + OUTPUT: RETVAL void -_set_stacklevel (...) - ALIAS: - Coro::State::transfer = 1 - Coro::schedule = 2 - Coro::cede = 3 - Coro::Cont::yield = 4 - CODE: +list () + PROTOTYPE: + PPCODE: { - struct transfer_args ta; + struct coro *coro; + for (coro = coro_first; coro; coro = coro->next) + if (coro->hv) + XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv))); +} - switch (ix) +void +call (Coro::State coro, SV *coderef) + ALIAS: + eval = 1 + CODE: +{ + if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot)) { - case 0: - ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); - ta.next = 0; - ta.flags = TRANSFER_SET_STACKLEVEL; - break; + struct coro *current = SvSTATE_current; + struct CoroSLF slf_save; - case 1: - if (items != 3) - croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items); + if (current != coro) + { + PUTBACK; + save_perl (aTHX_ current); + load_perl (aTHX_ coro); + /* the coro is most likely in an active SLF call. + * while not strictly required (the code we execute is + * not allowed to call any SLF functions), it's cleaner + * to reinitialise the slf_frame and restore it later. + * This might one day allow us to actually do SLF calls + * from code executed here. + */ + slf_save = slf_frame; + slf_frame.prepare = 0; + SPAGAIN; + } - prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2))); - break; + PUSHSTACK; - case 2: - prepare_schedule (&ta); - break; + PUSHMARK (SP); + PUTBACK; - case 3: - prepare_cede (&ta); - break; + if (ix) + eval_sv (coderef, 0); + else + call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); + + POPSTACK; + SPAGAIN; - case 4: + if (current != coro) { - SV *yieldstack; - SV *sv; - AV *defav = GvAV (PL_defgv); - - yieldstack = *hv_fetch ( - (HV *)SvRV (GvSV (coro_current)), - "yieldstack", sizeof ("yieldstack") - 1, - 0 - ); - - /* set up @_ -- ugly */ - av_clear (defav); - av_fill (defav, items - 1); - while (items--) - av_store (defav, items, SvREFCNT_inc (ST(items))); - - sv = av_pop ((AV *)SvRV (yieldstack)); - ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0)); - ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0)); - ta.flags = 0; - SvREFCNT_dec (sv); + PUTBACK; + slf_frame = slf_save; + save_perl (aTHX_ coro); + load_perl (aTHX_ current); + SPAGAIN; } - break; - } - - TRANSFER (ta); } -void -_clone_state_from (SV *dst, SV *src) +SV * +is_ready (Coro::State coro) + PROTOTYPE: $ + ALIAS: + is_ready = CF_READY + is_running = CF_RUNNING + is_new = CF_NEW + is_destroyed = CF_ZOMBIE + is_zombie = CF_ZOMBIE + is_suspended = CF_SUSPENDED CODE: -{ - struct coro *coro_src = SvSTATE (src); + RETVAL = boolSV (coro->flags & ix); + OUTPUT: + RETVAL - sv_unmagic (SvRV (dst), PERL_MAGIC_ext); +void +throw (SV *self, SV *exception = &PL_sv_undef) + PROTOTYPE: $;$ + CODE: +{ + struct coro *coro = SvSTATE (self); + struct coro *current = SvSTATE_current; + SV **exceptionp = coro == current ? &CORO_THROW : &coro->except; + SvREFCNT_dec (*exceptionp); + SvGETMAGIC (exception); + *exceptionp = SvOK (exception) ? newSVsv (exception) : 0; - ++coro_src->refcnt; - sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP; + api_ready (aTHX_ self); } void -_exit (code) - int code +api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) + PROTOTYPE: $;$ + C_ARGS: aTHX_ coro, flags + +SV * +has_cctx (Coro::State coro) PROTOTYPE: $ CODE: - _exit (code); + /* maybe manage the running flag differently */ + RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING)); + OUTPUT: + RETVAL int -cctx_count () +is_traced (Coro::State coro) + PROTOTYPE: $ CODE: - RETVAL = cctx_count; + RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; OUTPUT: RETVAL -int -cctx_idle () - CODE: - RETVAL = cctx_idle; +UV +rss (Coro::State coro) + PROTOTYPE: $ + ALIAS: + usecount = 1 + CODE: + switch (ix) + { + case 0: RETVAL = coro_rss (aTHX_ coro); break; + case 1: RETVAL = coro->usecount; break; + } OUTPUT: RETVAL -MODULE = Coro::State PACKAGE = Coro +void +force_cctx () + PROTOTYPE: + CODE: + cctx_current->idle_sp = 0; -BOOT: +void +swap_defsv (Coro::State self) + PROTOTYPE: $ + ALIAS: + swap_defav = 1 + CODE: + if (!self->slot) + croak ("cannot swap state with coroutine that has no saved state,"); + else + { + SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv); + SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv; + + SV *tmp = *src; *src = *dst; *dst = tmp; + } + +void +cancel (Coro::State self) + CODE: + coro_state_destroy (aTHX_ self); + +SV * +enable_times (int enabled = enable_times) + CODE: +{ + RETVAL = boolSV (enable_times); + + if (enabled != enable_times) + { + enable_times = enabled; + + coro_times_update (); + (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current)); + } +} + OUTPUT: + RETVAL + +void +times (Coro::State self) + PPCODE: +{ + struct coro *current = SvSTATE (coro_current); + + if (ecb_expect_false (current == self)) + { + coro_times_update (); + coro_times_add (SvSTATE (coro_current)); + } + + EXTEND (SP, 2); + PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9))); + PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9))); + + if (ecb_expect_false (current == self)) + coro_times_sub (SvSTATE (coro_current)); +} + +void +swap_sv (Coro::State coro, SV *sva, SV *svb) + CODE: { - int i; + struct coro *current = SvSTATE_current; + AV *swap_sv; + int i; + + sva = SvRV (sva); + svb = SvRV (svb); - coro_stash = gv_stashpv ("Coro", TRUE); + if (current == coro) + SWAP_SVS_LEAVE (current); - newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); - newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); - newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); - newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); - newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); - newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); + if (!coro->swap_sv) + coro->swap_sv = newAV (); - coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV); - coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV); + swap_sv = coro->swap_sv; - for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) - coro_ready[i] = newAV (); + for (i = AvFILLp (swap_sv) - 1; i >= 0; i -= 2) + { + SV *a = AvARRAY (swap_sv)[i ]; + SV *b = AvARRAY (swap_sv)[i + 1]; + + if (a == sva && b == svb) + { + SvREFCNT_dec_NN (a); + SvREFCNT_dec_NN (b); + + for (; i <= AvFILLp (swap_sv) - 2; i++) + AvARRAY (swap_sv)[i] = AvARRAY (swap_sv)[i + 2]; + + AvFILLp (swap_sv) -= 2; + + goto removed; + } + } + + av_push (swap_sv, SvREFCNT_inc_NN (sva)); + av_push (swap_sv, SvREFCNT_inc_NN (svb)); + + removed: + + if (current == coro) + SWAP_SVS_ENTER (current); +} + + +MODULE = Coro::State PACKAGE = Coro + +BOOT: +{ + if (SVt_LAST > 32) + croak ("Coro internal error: SVt_LAST > 32, swap_sv might need adjustment"); + + sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE); + sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); + cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD); + coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current); + av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE); + av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE); + sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE); + sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE); + + sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle); + sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro); + cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler); + CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */ + + coro_stash = gv_stashpv ("Coro", TRUE); + + newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX)); + newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH)); + newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL)); + newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW)); + newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE)); + newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN)); { - SV *sv = perl_get_sv("Coro::API", 1); + SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE); - coroapi.schedule = api_schedule; - coroapi.cede = api_cede; - coroapi.ready = api_ready; - coroapi.is_ready = api_is_ready; - coroapi.nready = &coro_nready; - coroapi.current = coro_current; + coroapi.schedule = api_schedule; + coroapi.schedule_to = api_schedule_to; + coroapi.cede = api_cede; + coroapi.cede_notself = api_cede_notself; + coroapi.ready = api_ready; + coroapi.is_ready = api_is_ready; + coroapi.nready = coro_nready; + coroapi.current = coro_current; + + coroapi.enterleave_hook = api_enterleave_hook; + coroapi.enterleave_unhook = api_enterleave_unhook; + coroapi.enterleave_scope_hook = api_enterleave_scope_hook; - GCoroAPI = &coroapi; + /*GCoroAPI = &coroapi;*/ sv_setiv (sv, (IV)&coroapi); SvREADONLY_on (sv); } } +SV * +async (...) + PROTOTYPE: &@ + CODE: + RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1); + api_ready (aTHX_ RETVAL); + OUTPUT: + RETVAL + +void +_destroy (Coro::State coro) + CODE: + /* used by the manager thread */ + coro_state_destroy (aTHX_ coro); + +void +on_destroy (Coro::State coro, SV *cb) + CODE: + coro_push_on_destroy (aTHX_ coro, newSVsv (cb)); + +void +join (...) + CODE: + CORO_EXECUTE_SLF_XS (slf_init_join); + +void +terminate (...) + CODE: + CORO_EXECUTE_SLF_XS (slf_init_terminate); + +void +cancel (...) + CODE: + CORO_EXECUTE_SLF_XS (slf_init_cancel); + +int +safe_cancel (Coro::State self, ...) + C_ARGS: aTHX_ self, &ST (1), items - 1 + +void +schedule (...) + CODE: + CORO_EXECUTE_SLF_XS (slf_init_schedule); + +void +schedule_to (...) + CODE: + CORO_EXECUTE_SLF_XS (slf_init_schedule_to); + +void +cede_to (...) + CODE: + CORO_EXECUTE_SLF_XS (slf_init_cede_to); + +void +cede (...) + CODE: + CORO_EXECUTE_SLF_XS (slf_init_cede); + +void +cede_notself (...) + CODE: + CORO_EXECUTE_SLF_XS (slf_init_cede_notself); + +void +_set_current (SV *current) + PROTOTYPE: $ + CODE: + SvREFCNT_dec_NN (SvRV (coro_current)); + SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current))); + +void +_set_readyhook (SV *hook) + PROTOTYPE: $ + CODE: + SvREFCNT_dec (coro_readyhook); + SvGETMAGIC (hook); + if (SvOK (hook)) + { + coro_readyhook = newSVsv (hook); + CORO_READYHOOK = invoke_sv_ready_hook_helper; + } + else + { + coro_readyhook = 0; + CORO_READYHOOK = 0; + } + int prio (Coro::State coro, int newprio = 0) + PROTOTYPE: $;$ ALIAS: nice = 1 CODE: @@ -1193,28 +4151,22 @@ if (items > 1) { if (ix) - newprio += coro->prio; + newprio = coro->prio - newprio; - if (newprio < PRIO_MIN) newprio = PRIO_MIN; - if (newprio > PRIO_MAX) newprio = PRIO_MAX; + if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN; + if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX; coro->prio = newprio; } } - -SV * -ready (SV *self) - PROTOTYPE: $ - CODE: - RETVAL = boolSV (api_ready (self)); OUTPUT: RETVAL SV * -is_ready (SV *self) +ready (SV *self) PROTOTYPE: $ CODE: - RETVAL = boolSV (api_is_ready (self)); + RETVAL = boolSV (api_ready (aTHX_ self)); OUTPUT: RETVAL @@ -1226,43 +4178,348 @@ OUTPUT: RETVAL -MODULE = Coro::State PACKAGE = Coro::AIO +void +suspend (Coro::State self) + PROTOTYPE: $ + CODE: + self->flags |= CF_SUSPENDED; + +void +resume (Coro::State self) + PROTOTYPE: $ + CODE: + self->flags &= ~CF_SUSPENDED; + +void +_pool_handler (...) + CODE: + CORO_EXECUTE_SLF_XS (slf_init_pool_handler); + +void +async_pool (SV *cv, ...) + PROTOTYPE: &@ + PPCODE: +{ + HV *hv = (HV *)av_pop (av_async_pool); + AV *av = newAV (); + SV *cb = ST (0); + int i; + + av_extend (av, items - 2); + for (i = 1; i < items; ++i) + av_push (av, SvREFCNT_inc_NN (ST (i))); + + if ((SV *)hv == &PL_sv_undef) + { + SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1); + hv = (HV *)SvREFCNT_inc_NN (SvRV (sv)); + SvREFCNT_dec_NN (sv); + } + + { + struct coro *coro = SvSTATE_hv (hv); + + assert (!coro->invoke_cb); + assert (!coro->invoke_av); + coro->invoke_cb = SvREFCNT_inc (cb); + coro->invoke_av = av; + } + + api_ready (aTHX_ (SV *)hv); + + if (GIMME_V != G_VOID) + XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv))); + else + SvREFCNT_dec_NN (hv); +} + +SV * +rouse_cb () + PROTOTYPE: + CODE: + RETVAL = coro_new_rouse_cb (aTHX); + OUTPUT: + RETVAL + +void +rouse_wait (...) + PROTOTYPE: ;$ + PPCODE: + CORO_EXECUTE_SLF_XS (slf_init_rouse_wait); + +void +on_enter (SV *block) + ALIAS: + on_leave = 1 + PROTOTYPE: & + CODE: +{ + struct coro *coro = SvSTATE_current; + AV **avp = ix ? &coro->on_leave : &coro->on_enter; + + block = s_get_cv_croak (block); + + if (!*avp) + *avp = newAV (); + + av_push (*avp, SvREFCNT_inc (block)); + + if (!ix) + on_enterleave_call (aTHX_ block); + + LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */ + SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro); + ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */ +} + + +MODULE = Coro::State PACKAGE = PerlIO::cede + +BOOT: + PerlIO_define_layer (aTHX_ &PerlIO_cede); + + +MODULE = Coro::State PACKAGE = Coro::Semaphore SV * -_get_state () +new (SV *klass, SV *count = 0) CODE: { - struct { - int errorno; - int laststype; - int laststatval; - Stat_t statcache; - } data; - - data.errorno = errno; - data.laststype = PL_laststype; - data.laststatval = PL_laststatval; - data.statcache = PL_statcache; + int semcnt = 1; + + if (count) + { + SvGETMAGIC (count); + + if (SvOK (count)) + semcnt = SvIV (count); + } - RETVAL = newSVpvn ((char *)&data, sizeof data); + RETVAL = sv_bless ( + coro_waitarray_new (aTHX_ semcnt), + GvSTASH (CvGV (cv)) + ); } OUTPUT: RETVAL +# helper for Coro::Channel and others +SV * +_alloc (int count) + CODE: + RETVAL = coro_waitarray_new (aTHX_ count); + OUTPUT: + RETVAL + +SV * +count (SV *self) + CODE: + RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]); + OUTPUT: + RETVAL + void -_set_state (char *data_) - PROTOTYPE: $ +up (SV *self) + CODE: + coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), 1); + +void +adjust (SV *self, int adjust) + CODE: + coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), adjust); + +void +down (...) + CODE: + CORO_EXECUTE_SLF_XS (slf_init_semaphore_down); + +void +wait (...) + CODE: + CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait); + +void +try (SV *self) + PPCODE: +{ + AV *av = (AV *)SvRV (self); + SV *count_sv = AvARRAY (av)[0]; + IV count = SvIVX (count_sv); + + if (count > 0) + { + --count; + SvIVX (count_sv) = count; + XSRETURN_YES; + } + else + XSRETURN_NO; +} + +void +waiters (SV *self) + PPCODE: +{ + AV *av = (AV *)SvRV (self); + int wcount = AvFILLp (av) + 1 - 1; + + if (GIMME_V == G_SCALAR) + XPUSHs (sv_2mortal (newSViv (wcount))); + else + { + int i; + EXTEND (SP, wcount); + for (i = 1; i <= wcount; ++i) + PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i]))); + } +} + +MODULE = Coro::State PACKAGE = Coro::SemaphoreSet + +void +_may_delete (SV *sem, int count, unsigned int extra_refs) + PPCODE: +{ + AV *av = (AV *)SvRV (sem); + + if (SvREFCNT ((SV *)av) == 1 + extra_refs + && AvFILLp (av) == 0 /* no waiters, just count */ + && SvIV (AvARRAY (av)[0]) == count) + XSRETURN_YES; + + XSRETURN_NO; +} + +MODULE = Coro::State PACKAGE = Coro::Signal + +SV * +new (SV *klass) CODE: + RETVAL = sv_bless ( + coro_waitarray_new (aTHX_ 0), + GvSTASH (CvGV (cv)) + ); + OUTPUT: + RETVAL + +void +wait (...) + CODE: + CORO_EXECUTE_SLF_XS (slf_init_signal_wait); + +void +broadcast (SV *self) + CODE: { - struct { - int errorno; - int laststype; - int laststatval; - Stat_t statcache; - } *data = (void *)data_; - - errno = data->errorno; - PL_laststype = data->laststype; - PL_laststatval = data->laststatval; - PL_statcache = data->statcache; + AV *av = (AV *)SvRV (self); + coro_signal_wake (aTHX_ av, AvFILLp (av)); } + +void +send (SV *self) + CODE: +{ + AV *av = (AV *)SvRV (self); + + if (AvFILLp (av)) + coro_signal_wake (aTHX_ av, 1); + else + SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */ +} + +IV +awaited (SV *self) + CODE: + RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1; + OUTPUT: + RETVAL + + +MODULE = Coro::State PACKAGE = Coro::AnyEvent + +BOOT: + sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE); + +void +_schedule (...) + CODE: +{ + static int incede; + + api_cede_notself (aTHX); + + ++incede; + while (coro_nready >= incede && api_cede (aTHX)) + ; + + sv_setsv (sv_activity, &PL_sv_undef); + if (coro_nready >= incede) + { + PUSHMARK (SP); + PUTBACK; + call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); + } + + --incede; +} + + +MODULE = Coro::State PACKAGE = Coro::AIO + +void +_register (char *target, char *proto, SV *req) + CODE: +{ + SV *req_cv = s_get_cv_croak (req); + /* newXSproto doesn't return the CV on 5.8 */ + CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__); + sv_setpv ((SV *)slf_cv, proto); + sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0); +} + +MODULE = Coro::State PACKAGE = Coro::Select + +void +patch_pp_sselect () + CODE: + if (!coro_old_pp_sselect) + { + coro_select_select = (SV *)get_cv ("Coro::Select::select", 0); + coro_old_pp_sselect = PL_ppaddr [OP_SSELECT]; + PL_ppaddr [OP_SSELECT] = coro_pp_sselect; + } + +void +unpatch_pp_sselect () + CODE: + if (coro_old_pp_sselect) + { + PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect; + coro_old_pp_sselect = 0; + } + +MODULE = Coro::State PACKAGE = Coro::Util + +void +_exit (int code) + CODE: + _exit (code); + +NV +time () + CODE: + RETVAL = nvtime (aTHX); + OUTPUT: + RETVAL + +NV +gettimeofday () + PPCODE: +{ + UV tv [2]; + u2time (aTHX_ tv); + EXTEND (SP, 2); + PUSHs (sv_2mortal (newSVuv (tv [0]))); + PUSHs (sv_2mortal (newSVuv (tv [1]))); +} +