WebSVN – HelenOS – Diff – /trunk/kernel/generic/include/proc/task.h

 /*
  * Copyright (c) 2001-2004 Jakub Jermar
  * All rights reserved.
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
+ *
  * - Redistributions of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
  * - Redistributions in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
  * - The name of the author may not be used to endorse or promote products
  *   derived from this software without specific prior written permission.
+ *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 /** @addtogroup genericproc
  * @{
  */
 /** @file
  */
 #ifndef KERN_TASK_H_
 #define KERN_TASK_H_
 #include <cpu.h>
 #include <synch/spinlock.h>
 #include <synch/mutex.h>
 #include <synch/rwlock.h>
 #include <synch/futex.h>
 #include <adt/btree.h>
 #include <adt/list.h>
 #include <security/cap.h>
 #include <arch/proc/task.h>
 #include <arch/proc/thread.h>
 #include <arch/context.h>
 #include <arch/fpu_context.h>
 #include <arch/cpu.h>
 #include <mm/tlb.h>
 #include <proc/scheduler.h>
 #define IPC_MAX_PHONES  16
-#define THREAD_NAME_BUFLEN  20
 struct answerbox;
 struct task;
 struct thread;
 typedef enum {
     IPC_PHONE_FREE = 0,     /**< Phone is free and can be allocated */
     IPC_PHONE_CONNECTING,   /**< Phone is connecting somewhere */
     IPC_PHONE_CONNECTED,    /**< Phone is connected */
     IPC_PHONE_HUNGUP,   /**< Phone is hung up, waiting for answers to come */
     IPC_PHONE_SLAMMED       /**< Phone was hungup from server */
 } ipc_phone_state_t;
 /** Structure identifying phone (in TASK structure) */
 typedef struct {
     SPINLOCK_DECLARE(lock);
     link_t link;
     struct answerbox *callee;
     ipc_phone_state_t state;
     atomic_t active_calls;
 } phone_t;
 typedef struct answerbox {
     SPINLOCK_DECLARE(lock);
     struct task *task;
     waitq_t wq;
     link_t connected_phones;    /**< Phones connected to this answerbox */
     link_t calls;           /**< Received calls */
     link_t dispatched_calls;    /* Should be hash table in the future */
     link_t answers;         /**< Answered calls */
     SPINLOCK_DECLARE(irq_lock);
     link_t irq_notifs;          /**< Notifications from IRQ handlers */
     link_t irq_head;        /**< IRQs with notifications to this answerbox. */
 } answerbox_t;
 /** Task structure. */
 typedef struct task {
     /** Task lock.
+     *
      * Must be acquired before threads_lock and thread lock of any of its threads.
      */
     SPINLOCK_DECLARE(lock);
     char *name;
     struct thread *main_thread; /**< Pointer to the main thread. */
     link_t th_head;     /**< List of threads contained in this task. */
     as_t *as;       /**< Address space. */
     task_id_t taskid;   /**< Unique identity of task */
     context_id_t context;   /**< Task security context */
     /** If this is true, new threads can become part of the task. */
     bool accept_new_threads;
     count_t refcount;   /**< Number of references (i.e. threads). */
     cap_t capabilities; /**< Task capabilities. */
     /* IPC stuff */
     answerbox_t answerbox;  /**< Communication endpoint */
     phone_t phones[IPC_MAX_PHONES];
     atomic_t active_calls;  /**< Active asynchronous messages.
                  *   It is used for limiting uspace to
                  *   certain extent. */
     task_arch_t arch;   /**< Architecture specific task data. */
     /**
      * Serializes access to the B+tree of task's futexes. This mutex is
      * independent on the task spinlock.
      */
     mutex_t futexes_lock;
     btree_t futexes;    /**< B+tree of futexes referenced by this task. */
     uint64_t cycles;    /**< Accumulated accounting. */
 } task_t;
 typedef void (* timeout_handler_t)(void *arg);
 typedef struct {
     SPINLOCK_DECLARE(lock);
     link_t link;            /**< Link to the list of active timeouts on THE->cpu */
     uint64_t ticks;         /**< Timeout will be activated in this amount of clock() ticks. */
     timeout_handler_t handler;  /**< Function that will be called on timeout activation. */
     void *arg;          /**< Argument to be passed to handler() function. */
     cpu_t *cpu;         /**< On which processor is this timeout registered. */
 } timeout_t;
 /** Thread states. */
 typedef enum {
     Invalid,    /**< It is an error, if thread is found in this state. */
     Running,    /**< State of a thread that is currently executing on some CPU. */
     Sleeping,   /**< Thread in this state is waiting for an event. */
     Ready,      /**< State of threads in a run queue. */
     Entering,   /**< Threads are in this state before they are first readied. */
     Exiting,    /**< After a thread calls thread_exit(), it is put into Exiting state. */
     Undead      /**< Threads that were not detached but exited are in the Undead state. */
 } state_t;
 /** Join types. */
 typedef enum {
     None,
     TaskClnp,   /**< The thread will be joined by ktaskclnp thread. */
     TaskGC      /**< The thread will be joined by ktaskgc thread. */
 } thread_join_type_t;
-/** Thread structure. There is one per thread. */
-typedef struct thread {
-    link_t rq_link;             /**< Run queue link. */
-    link_t wq_link;             /**< Wait queue link. */
-    link_t th_link;             /**< Links to threads within containing task. */
-    /** Lock protecting thread structure.
-     *
-     * Protects the whole thread structure except list links above.
-     */
-    SPINLOCK_DECLARE(lock);
-    char name[THREAD_NAME_BUFLEN];
-    void (* thread_code)(void *);       /**< Function implementing the thread. */
-    void *thread_arg;           /**< Argument passed to thread_code() function. */
-    /** From here, the stored context is restored when the thread is scheduled. */
-    context_t saved_context;
-    /** From here, the stored timeout context is restored when sleep times out. */
-    context_t sleep_timeout_context;
-    /** From here, the stored interruption context is restored when sleep is interrupted. */
-    context_t sleep_interruption_context;
-    bool sleep_interruptible;       /**< If true, the thread can be interrupted from sleep. */
-    waitq_t *sleep_queue;           /**< Wait queue in which this thread sleeps. */
-    timeout_t sleep_timeout;        /**< Timeout used for timeoutable sleeping.  */
-    volatile int timeout_pending;       /**< Flag signalling sleep timeout in progress. */
-    /** True if this thread is executing copy_from_uspace(). False otherwise. */
-    bool in_copy_from_uspace;
-    /** True if this thread is executing copy_to_uspace(). False otherwise. */
-    bool in_copy_to_uspace;
-    /**
-     * If true, the thread will not go to sleep at all and will
-     * call thread_exit() before returning to userspace.
-     */
-    bool interrupted;
-    thread_join_type_t  join_type;  /**< Who joinins the thread. */
-    bool detached;              /**< If true, thread_join_timeout() cannot be used on this thread. */
-    waitq_t join_wq;            /**< Waitq for thread_join_timeout(). */
-    fpu_context_t *saved_fpu_context;
-    int fpu_context_exists;
-    /*
-     * Defined only if thread doesn't run.
-     * It means that fpu context is in CPU that last time executes this thread.
-     * This disables migration.
-     */
-    int fpu_context_engaged;
-    rwlock_type_t rwlock_holder_type;
-    void (* call_me)(void *);       /**< Funtion to be called in scheduler before the thread is put asleep. */
-    void *call_me_with;         /**< Argument passed to call_me(). */
-    state_t state;              /**< Thread's state. */
-    int flags;              /**< Thread's flags. */
-    cpu_t *cpu;             /**< Thread's CPU. */
-    task_t *task;               /**< Containing task. */
-    uint64_t ticks;             /**< Ticks before preemption. */
-    uint64_t cycles;            /**< Thread accounting. */
-    uint64_t last_cycle;        /**< Last sampled cycle. */
-    bool uncounted;             /**< Thread doesn't affect accumulated accounting. */
-    int priority;               /**< Thread's priority. Implemented as index to CPU->rq */
-    uint32_t tid;               /**< Thread ID. */
-    thread_arch_t arch;         /**< Architecture-specific data. */
-    uint8_t *kstack;            /**< Thread's kernel stack. */
-} thread_t;
 SPINLOCK_EXTERN(tasks_lock);
 extern btree_t tasks_btree;
 extern void task_init(void);
 extern task_t *task_create(as_t *as, char *name);
 extern void task_destroy(task_t *t);
 extern task_t *task_run_program(void *program_addr, char *name);
 extern task_t *task_find_by_id(task_id_t id);
 extern int task_kill(task_id_t id);
 extern uint64_t task_get_accounting(task_t *t);
 extern void cap_set(task_t *t, cap_t caps);
 extern cap_t cap_get(task_t *t);
 #ifndef task_create_arch
 extern void task_create_arch(task_t *t);
 #endif
 #ifndef task_destroy_arch
 extern void task_destroy_arch(task_t *t);
 #endif
 extern unative_t sys_task_get_id(task_id_t *uspace_task_id);
 #endif
 /** @}
  */

Subversion Repositories HelenOS

(root)/trunk/kernel/generic/include/proc/task.h – Rev 2093 → 2096