Shuffle code
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38d105dede
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liberty.c
180
liberty.c
@ -1081,17 +1081,6 @@ struct async
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async_fn destroy; ///< Destroys the whole object
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};
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static void
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async_init (struct async *self, struct async_manager *manager)
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{
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memset (self, 0, sizeof *self);
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self->manager = manager;
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}
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static bool async_run (struct async *self);
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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struct async_manager
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{
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pthread_mutex_t lock; ///< Lock for the queues
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@ -1110,19 +1099,87 @@ struct async_manager
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int finished_pipe[2]; ///< Signals that a task has finished
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};
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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static void
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async_manager_init (struct async_manager *self)
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async_init (struct async *self, struct async_manager *manager)
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{
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memset (self, 0, sizeof *self);
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hard_assert (!pthread_mutex_init (&self->lock, NULL));
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hard_assert (!pthread_cond_init (&self->finished_cond, NULL));
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hard_assert (!pipe (self->finished_pipe));
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hard_assert (set_blocking (self->finished_pipe[0], false));
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set_cloexec (self->finished_pipe[0]);
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set_cloexec (self->finished_pipe[1]);
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self->manager = manager;
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}
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/// Only allowed from the main thread once the job has been started but before
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/// the results have been dispatched
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static void
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async_cancel (struct async *self)
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{
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if (self->started)
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soft_assert (!pthread_cancel (self->worker));
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self->cancelled = true;
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}
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static void
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async_cleanup (void *user_data)
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{
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struct async *self = user_data;
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hard_assert (!pthread_mutex_lock (&self->manager->lock));
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LIST_UNLINK (self->manager->running, self);
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LIST_PREPEND (self->manager->finished, self);
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hard_assert (!pthread_mutex_unlock (&self->manager->lock));
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hard_assert (!pthread_cond_broadcast (&self->manager->finished_cond));
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hard_assert (write (self->manager->finished_pipe[1], "", 1) > 0);
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}
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static void *
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async_routine (void *user_data)
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{
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// Beware that we mustn't trigger any cancellation point before we set up
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// the cleanup handler, otherwise we'd need to disable it first
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struct async *self = user_data;
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pthread_cleanup_push (async_cleanup, self);
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self->execute (self);
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pthread_cleanup_pop (true);
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return NULL;
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}
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static bool
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async_run (struct async *self)
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{
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hard_assert (!pthread_mutex_lock (&self->manager->lock));
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LIST_PREPEND (self->manager->running, self);
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hard_assert (!pthread_mutex_unlock (&self->manager->lock));
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// Block all signals so that the new thread doesn't receive any (inherited)
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sigset_t all_blocked, old_blocked;
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hard_assert (!sigfillset (&all_blocked));
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hard_assert (!pthread_sigmask (SIG_SETMASK, &all_blocked, &old_blocked));
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int error = pthread_create (&self->worker, NULL, async_routine, self);
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// Now that we've created the thread, resume signal processing as usual
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hard_assert (!pthread_sigmask (SIG_SETMASK, &old_blocked, NULL));
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if (error)
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{
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hard_assert (error == EAGAIN);
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hard_assert (!pthread_mutex_lock (&self->manager->lock));
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LIST_UNLINK (self->manager->running, self);
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hard_assert (!pthread_mutex_unlock (&self->manager->lock));
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// FIXME: we probably want to have some kind of a limit on the queue
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LIST_PREPEND (self->manager->delayed, self);
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return false;
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}
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return (self->started = true);
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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static bool
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async_manager_retry (struct async_manager *self, struct async *async)
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{
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@ -1199,6 +1256,19 @@ async_manager_cancel_all (struct async_manager *self)
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async_manager_dispatch (self);
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}
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static void
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async_manager_init (struct async_manager *self)
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{
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memset (self, 0, sizeof *self);
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hard_assert (!pthread_mutex_init (&self->lock, NULL));
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hard_assert (!pthread_cond_init (&self->finished_cond, NULL));
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hard_assert (!pipe (self->finished_pipe));
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hard_assert (set_blocking (self->finished_pipe[0], false));
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set_cloexec (self->finished_pipe[0]);
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set_cloexec (self->finished_pipe[1]);
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}
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static void
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async_manager_free (struct async_manager *self)
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{
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@ -1210,78 +1280,6 @@ async_manager_free (struct async_manager *self)
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xclose (self->finished_pipe[1]);
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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/// Only allowed from the main thread once the job has been started but before
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/// the results have been dispatched
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static void
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async_cancel (struct async *self)
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{
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if (self->started)
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soft_assert (!pthread_cancel (self->worker));
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self->cancelled = true;
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}
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static void
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async_cleanup (void *user_data)
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{
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struct async *self = user_data;
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hard_assert (!pthread_mutex_lock (&self->manager->lock));
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LIST_UNLINK (self->manager->running, self);
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LIST_PREPEND (self->manager->finished, self);
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hard_assert (!pthread_mutex_unlock (&self->manager->lock));
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hard_assert (!pthread_cond_broadcast (&self->manager->finished_cond));
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hard_assert (write (self->manager->finished_pipe[1], "", 1) > 0);
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}
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static void *
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async_routine (void *user_data)
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{
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// Beware that we mustn't trigger any cancellation point before we set up
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// the cleanup handler, otherwise we'd need to disable it first
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struct async *self = user_data;
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pthread_cleanup_push (async_cleanup, self);
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self->execute (self);
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pthread_cleanup_pop (true);
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return NULL;
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}
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static bool
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async_run (struct async *self)
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{
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hard_assert (!pthread_mutex_lock (&self->manager->lock));
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LIST_PREPEND (self->manager->running, self);
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hard_assert (!pthread_mutex_unlock (&self->manager->lock));
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// Block all signals so that the new thread doesn't receive any (inherited)
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sigset_t all_blocked, old_blocked;
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hard_assert (!sigfillset (&all_blocked));
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hard_assert (!pthread_sigmask (SIG_SETMASK, &all_blocked, &old_blocked));
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int error = pthread_create (&self->worker, NULL, async_routine, self);
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// Now that we've created the thread, resume signal processing as usual
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hard_assert (!pthread_sigmask (SIG_SETMASK, &old_blocked, NULL));
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if (error)
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{
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hard_assert (error == EAGAIN);
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hard_assert (!pthread_mutex_lock (&self->manager->lock));
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LIST_UNLINK (self->manager->running, self);
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hard_assert (!pthread_mutex_unlock (&self->manager->lock));
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// FIXME: we probably want to have some kind of a limit on the queue
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LIST_PREPEND (self->manager->delayed, self);
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return false;
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}
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return (self->started = true);
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}
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#endif // LIBERTY_WANT_ASYNC
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// --- Event loop --------------------------------------------------------------
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