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/*
* Mach Operating System
* Copyright (c) 1993-1988 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
* File: task.h
* Author: Avadis Tevanian, Jr.
*
* This file contains the structure definitions for tasks.
*
*/
#ifndef _KERN_TASK_H_
#define _KERN_TASK_H_
#include <mach/boolean.h>
#include <mach/port.h>
#include <mach/time_value.h>
#include <mach/mach_param.h>
#include <mach/task_info.h>
#include <mach_debug/mach_debug_types.h>
#include <kern/kern_types.h>
#include <kern/lock.h>
#include <kern/queue.h>
#include <kern/pc_sample.h>
#include <kern/processor.h>
#include <kern/syscall_emulation.h>
#include <vm/vm_types.h>
#include <machine/task.h>
/*
* Task name buffer size. The size is chosen so that struct task fits
* into three cache lines. The size of a cache line on a typical CPU
* is 64 bytes.
*/
#define TASK_NAME_SIZE 32
struct task {
/* Synchronization/destruction information */
decl_simple_lock_data(,lock) /* Task's lock */
int ref_count; /* Number of references to me */
/* Flags */
unsigned int active:1, /* Task has not been terminated */
/* boolean_t */ may_assign:1, /* can assigned pset be changed? */
assign_active:1; /* waiting for may_assign */
/* Miscellaneous */
vm_map_t map; /* Address space description */
queue_chain_t pset_tasks; /* list of tasks assigned to pset */
int suspend_count; /* Internal scheduling only */
/* Thread information */
queue_head_t thread_list; /* list of threads */
int thread_count; /* number of threads */
processor_set_t processor_set; /* processor set for new threads */
/* User-visible scheduling information */
int user_stop_count; /* outstanding stops */
int priority; /* for new threads */
/* Statistics */
time_value_t total_user_time;
/* total user time for dead threads */
time_value_t total_system_time;
/* total system time for dead threads */
time_value_t creation_time; /* time stamp at creation */
/* IPC structures */
struct lock itk_lock_data;
struct ipc_port *itk_self; /* not a right, doesn't hold ref */
struct ipc_port *itk_sself; /* a send right */
struct ipc_port *itk_exception; /* a send right */
struct ipc_port *itk_bootstrap; /* a send right */
struct ipc_port *itk_registered[TASK_PORT_REGISTER_MAX];
/* all send rights */
struct ipc_space *itk_space;
/* User space system call emulation support */
struct eml_dispatch *eml_dispatch;
sample_control_t pc_sample;
#if FAST_TAS
#define TASK_FAST_TAS_NRAS 8
vm_offset_t fast_tas_base[TASK_FAST_TAS_NRAS];
vm_offset_t fast_tas_end[TASK_FAST_TAS_NRAS];
#endif /* FAST_TAS */
/* Hardware specific data. */
machine_task_t machine;
/* Statistics */
natural_t faults; /* page faults counter */
natural_t zero_fills; /* zero fill pages counter */
natural_t reactivations; /* reactivated pages counter */
natural_t pageins; /* actual pageins couter */
natural_t cow_faults; /* copy-on-write faults counter */
natural_t messages_sent; /* messages sent counter */
natural_t messages_received; /* messages received counter */
char name[TASK_NAME_SIZE];
};
#define task_lock(task) simple_lock(&(task)->lock)
#define task_unlock(task) simple_unlock(&(task)->lock)
#define itk_lock_init(task) lock_init(&(task)->itk_lock_data, FALSE)
#define itk_lock(task) lock_write(&(task)->itk_lock_data)
#define itk_unlock(task) lock_write_done(&(task)->itk_lock_data)
/*
* Exported routines/macros
*/
extern kern_return_t task_create(
task_t parent_task,
boolean_t inherit_memory,
task_t *child_task);
extern kern_return_t task_terminate(
task_t task);
extern kern_return_t task_suspend(
task_t task);
extern kern_return_t task_resume(
task_t task);
extern kern_return_t task_threads(
task_t task,
thread_array_t *thread_list,
natural_t *count);
extern kern_return_t task_info(
task_t task,
int flavor,
task_info_t task_info_out,
natural_t *task_info_count);
extern kern_return_t task_get_special_port(
task_t task,
int which,
struct ipc_port **portp);
extern kern_return_t task_set_special_port(
task_t task,
int which,
struct ipc_port *port);
extern kern_return_t task_assign(
task_t task,
processor_set_t new_pset,
boolean_t assign_threads);
extern kern_return_t task_assign_default(
task_t task,
boolean_t assign_threads);
extern kern_return_t task_set_name(
task_t task,
kernel_debug_name_t name);
extern void consider_task_collect(void);
/*
* Internal only routines
*/
extern void task_init(void);
extern void task_reference(task_t);
extern void task_deallocate(task_t);
extern void task_hold_locked(task_t);
extern kern_return_t task_hold(task_t);
extern kern_return_t task_dowait(task_t, boolean_t);
extern kern_return_t task_release(task_t);
extern task_t kernel_task;
#endif /* _KERN_TASK_H_ */
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