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#define PERL_NO_GET_CONTEXT |
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|
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#include "EXTERN.h" |
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#include "perl.h" |
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#include "XSUB.h" |
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|
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#define X_STACKSIZE -1 |
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|
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#include "CoroAPI.h" |
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#include "perlmulticore.h" |
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#include "schmorp.h" |
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#include "xthread.h" |
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|
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#ifdef _WIN32 |
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typedef char sigset_t; |
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#define pthread_sigmask(mode,new,old) |
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#endif |
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|
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static pthread_key_t current_key; |
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|
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static s_epipe ep; |
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static void *perl_thx; |
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static sigset_t cursigset, fullsigset; |
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|
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struct tctx |
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{ |
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void *coro; |
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}; |
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|
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static struct tctx *tctx_free; |
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|
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static int available; |
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static int max_idle = 8; |
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|
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static xmutex_t perl_m = X_MUTEX_INIT; static xcond_t perl_c = X_COND_INIT; static struct tctx *perl_f; |
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static xmutex_t wait_m = X_MUTEX_INIT; static xcond_t wait_c = X_COND_INIT; static int wait_f; |
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|
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static int wakeup_f; |
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static struct tctx **waiters; |
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static int waiters_count, waiters_max; |
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|
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static struct tctx * |
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tctx_get (void) |
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{ |
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struct tctx *ctx; |
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|
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if (!tctx_free) |
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ctx = malloc (sizeof (*tctx_free)); |
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else |
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{ |
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ctx = tctx_free; |
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tctx_free = tctx_free->coro; |
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} |
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|
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return ctx; |
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} |
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|
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static void |
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tctx_put (struct tctx *ctx) |
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{ |
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ctx->coro = tctx_free; |
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tctx_free = ctx; |
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} |
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|
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X_THREAD_PROC(thread_proc) |
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{ |
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PERL_SET_CONTEXT (perl_thx); |
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|
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{ |
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dTHX; /* inefficient, we already have perl_thx, but I see no better way */ |
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struct tctx *ctx; |
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|
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for (;;) |
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{ |
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/* TODO: should really use some idle time and exit after that */ |
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X_LOCK (perl_m); |
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while (!perl_f) |
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X_COND_WAIT (perl_c, perl_m); |
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ctx = perl_f; |
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perl_f = 0; |
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--available; |
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pthread_sigmask (SIG_SETMASK, &cursigset, 0); |
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X_UNLOCK (perl_m); |
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|
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while (ctx->coro) |
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CORO_SCHEDULE; |
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|
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X_LOCK (wait_m); |
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pthread_sigmask (SIG_SETMASK, &fullsigset, &cursigset); |
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wait_f = 1; |
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X_COND_SIGNAL (wait_c); |
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|
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if (available >= max_idle) |
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{ |
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X_UNLOCK (wait_m); |
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break; |
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} |
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|
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++available; |
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X_UNLOCK (wait_m); |
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} |
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} |
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} |
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|
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static void |
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start_thread (void) |
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{ |
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xthread_t tid; |
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|
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++available; |
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xthread_create (&tid, thread_proc, 0); |
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} |
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|
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static void |
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pmapi_release (void) |
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{ |
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struct tctx *ctx = tctx_get (); |
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ctx->coro = SvREFCNT_inc_NN (CORO_CURRENT); |
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pthread_setspecific (current_key, ctx); |
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pthread_sigmask (SIG_SETMASK, &fullsigset, &cursigset); |
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|
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if (!available) |
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start_thread (); |
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|
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X_LOCK (perl_m); |
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perl_f = ctx; |
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X_COND_SIGNAL (perl_c); |
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X_UNLOCK (perl_m); |
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} |
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|
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static void |
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pmapi_acquire (void) |
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{ |
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struct tctx *ctx = pthread_getspecific (current_key); |
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|
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X_LOCK (wait_m); |
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|
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if (waiters_count >= waiters_max) |
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{ |
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waiters_max = waiters_max ? waiters_max * 2 : 16; |
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waiters = realloc (waiters, waiters_max * sizeof (*waiters)); |
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} |
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|
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waiters [waiters_count++] = ctx; |
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|
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s_epipe_signal (&ep); |
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while (!wait_f) |
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X_COND_WAIT (wait_c, wait_m); |
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wait_f = 0; |
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X_UNLOCK (wait_m); |
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|
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tctx_put (ctx); |
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pthread_sigmask (SIG_SETMASK, &cursigset, 0); |
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} |
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|
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MODULE = Coro::Multicore PACKAGE = Coro::Multicore |
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|
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PROTOTYPES: DISABLE |
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|
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BOOT: |
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{ |
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#ifndef _WIN32 |
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sigfillset (&fullsigset); |
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#endif |
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|
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pthread_key_create (¤t_key, 0); |
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|
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if (s_epipe_new (&ep)) |
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croak ("Coro::Multicore: unable to initialise event pipe.\n"); |
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|
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perl_thx = PERL_GET_CONTEXT; |
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|
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I_CORO_API ("Coro::Multicore"); |
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|
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/* not perfectly efficient to do it this way, but it's simple */ |
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perl_multicore_init (); |
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perl_multicore_api->pmapi_release = pmapi_release; |
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perl_multicore_api->pmapi_acquire = pmapi_acquire; |
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} |
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|
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U32 |
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max_idle_threads (U32 max = NO_INIT) |
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CODE: |
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X_LOCK (wait_m); |
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RETVAL = max_idle; |
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if (items) |
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max_idle = max; |
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X_UNLOCK (wait_m); |
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OUTPUT: |
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RETVAL |
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|
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|
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int |
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fd () |
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CODE: |
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RETVAL = s_epipe_fd (&ep); |
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OUTPUT: |
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RETVAL |
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|
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void |
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poll (...) |
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CODE: |
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s_epipe_drain (&ep); |
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X_LOCK (wait_m); |
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while (waiters_count) |
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{ |
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struct tctx *ctx = waiters [--waiters_count]; |
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CORO_READY ((SV *)ctx->coro); |
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SvREFCNT_dec_NN ((SV *)ctx->coro); |
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ctx->coro = 0; |
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} |
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X_UNLOCK (wait_m); |
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|
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void |
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sleep (NV seconds) |
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CODE: |
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perlinterp_release (); |
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usleep (seconds * 1e6); |
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perlinterp_acquire (); |
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|
