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/* Allocate kernel thread. Viengoos version.
Copyright (C) 2007, 2008 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <assert.h>
#include <errno.h>
#include <string.h>
#include <hurd/startup.h>
#include <hurd/storage.h>
#include <hurd/as.h>
#include <viengoos/addr.h>
#include <hurd/message-buffer.h>
#include <pt-internal.h>
extern struct hurd_startup_data *__hurd_startup_data;
extern vg_addr_t meta_data_activity;
int
__pthread_thread_alloc (struct __pthread *thread)
{
if (thread->have_kernel_resources)
return 0;
thread->lock_message_buffer = hurd_message_buffer_alloc_long ();
/* The main thread is already running of course. */
if (__pthread_num_threads == 1)
{
thread->object = __hurd_startup_data->thread;
thread->threadid = l4_myself ();
l4_set_user_defined_handle ((l4_word_t) thread);
/* Get the thread's UTCB and stash it. */
thread->utcb = hurd_utcb ();
/* Override the utcb fetch function. */
hurd_utcb = pthread_hurd_utcb_np;
assert (thread->utcb == hurd_utcb ());
}
else
{
struct storage storage;
storage = storage_alloc (meta_data_activity, vg_cap_thread,
/* Threads are rarely shortly lived. */
STORAGE_MEDIUM_LIVED, VG_OBJECT_POLICY_DEFAULT,
VG_ADDR_VOID);
if (VG_ADDR_IS_VOID (storage.addr))
{
debug (0, DEBUG_BOLD ("Out of memory"));
return EAGAIN;
}
thread->object = storage.addr;
error_t err;
err = hurd_activation_state_alloc (thread->object, &thread->utcb);
if (unlikely (err))
panic ("Failed to initialize thread's activation state: %d", err);
err = vg_cap_copy (VG_ADDR_VOID,
thread->lock_message_buffer->receiver,
VG_ADDR (VG_MESSENGER_THREAD_SLOT,
VG_MESSENGER_SLOTS_LOG2),
VG_ADDR_VOID, thread->object,
0, VG_CAP_PROPERTIES_DEFAULT);
if (err)
panic ("Failed to set lock messenger's thread");
/* Unblock the lock messenger. */
err = vg_ipc (VG_IPC_RECEIVE | VG_IPC_RECEIVE_ACTIVATE
| VG_IPC_RETURN,
VG_ADDR_VOID, thread->lock_message_buffer->receiver, VG_ADDR_VOID,
VG_ADDR_VOID, VG_ADDR_VOID, VG_ADDR_VOID, VG_ADDR_VOID);
if (err)
panic ("Failed to unblock messenger's thread");
}
thread->have_kernel_resources = true;
return 0;
}
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