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Diffstat (limited to 'task/task.h')
| -rw-r--r-- | task/task.h | 147 |
1 files changed, 0 insertions, 147 deletions
diff --git a/task/task.h b/task/task.h deleted file mode 100644 index f9f83fb..0000000 --- a/task/task.h +++ /dev/null @@ -1,147 +0,0 @@ -/* task.h - Generic definitions. - Copyright (C) 2004 Free Software Foundation, Inc. - Written by Marcus Brinkmann. - - This file is part of the GNU Hurd. - - The GNU Hurd is free software; you can redistribute it and/or - modify it under the terms of the GNU General Public License as - published by the Free Software Foundation; either version 2, or (at - your option) any later version. - - The GNU Hurd 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 - General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA. */ - -#ifndef TASK_H -#define TASK_H 1 - -#include <errno.h> - -#include <l4.h> -#include <hurd/cap-server.h> -#include <hurd/ihash.h> - -#include "output.h" - - -/* The program name. */ -extern char program_name[]; - -#define BUG_ADDRESS "<bug-hurd@gnu.org>" - -int main (int argc, char *argv[]); - - -/* The following function must be defined by the architecture - dependent code. */ - -/* Switch execution transparently to thread TO. The thread FROM, - which must be the current thread, will be halted. */ -void switch_thread (l4_thread_id_t from, l4_thread_id_t to); - - -/* Thread objects. These are not capabilities, but components of task - objects. */ -struct thread -{ - /* The next pointer in a linked list of threads. */ - struct thread *next; - - /* The thread ID of the thread. The version part is the task_id the - thread is assigned to, or undefined if the thread is unassigned. - The thread number is determined at construction and fixed. */ - l4_thread_id_t thread_id; - - /* FIXME: More members like priority, CPU usage etc. */ -}; -typedef struct thread *thread_t; - - -/* Set the range of thread IDs that we are allowed to allocate. */ -void thread_set_range (l4_thread_id_t first, l4_thread_id_t last); - -/* Allocate a new thread object with the thread ID THREAD_ID and - return it in THREAD. Only used at bootstrap. */ -error_t thread_alloc_with_id (l4_thread_id_t thread_id, thread_t *thread); - -/* Allocate a new thread object and return it in THREAD. */ -error_t thread_alloc (thread_t *thread); - -/* Deallocate the thread THREAD. */ -void thread_dealloc (thread_t thread); - - -/* Task objects. */ - -struct task -{ - /* This is for fast removal from the task_id_to_task hash table. */ - hurd_ihash_locp_t locp; - - /* The task ID is used in the version field of the global thread ID, - so it is limited to L4_THREAD_VERSION_BITS (14/32) bits and must - not have its lower 6 bits set to all zero (because that indicates - a local thread ID). */ - hurd_task_id_t task_id; - - /* The threads in this task. */ - unsigned int nr_threads; - thread_t threads; -}; -typedef struct task *task_t; - - -/* Initialize the task class subsystem. */ -error_t task_class_init (); - -/* Allocate a new task object with the task ID TASK_ID and the - NR_THREADS threads listed in THREADS (which are already allocated - for that task. The object returned is locked and has one - reference. */ -error_t task_alloc (l4_word_t task_id, unsigned int nr_threads, - l4_thread_id_t *threads, task_t *r_task); - - -extern pthread_mutex_t task_id_to_task_lock; - -/* The hash table mapping task IDs to tasks. */ -extern struct hurd_ihash task_id_to_task; - -/* Acquire a reference for the task with the task ID TASK_ID and - return the task object. If the task ID is not valid, return - NULL. */ -static inline task_t -task_id_get_task (hurd_task_id_t task_id) -{ - task_t task; - - pthread_mutex_lock (&task_id_to_task_lock); - task = hurd_ihash_find (&task_id_to_task, task_id); - if (task) - { - hurd_cap_obj_t obj = hurd_cap_obj_from_user (task_t, task); - hurd_cap_obj_ref (obj); - } - pthread_mutex_unlock (&task_id_to_task_lock); - - return task; -} - - -/* Enter the task TASK under its ID into the hash table, consuming one - reference. Mainly used by the bootstrap functions. */ -error_t task_id_enter (task_t task); - -/* Find a free task ID, enter the task TASK (which must not be locked) - into the hash table under this ID, acquiring reference. The new - task ID is returned in TASK_ID. If no free task ID is available, - EAGAIN is returned. */ -error_t task_id_add (task_t task, hurd_task_id_t *task_id_p); - -#endif /* TASK_H */ |