| 0,0 → 1,125 |
|---|
| /* |
| * 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. |
| */ |
| |
| #ifndef __THREAD_H__ |
| #define __THREAD_H__ |
| |
| #include <arch/thread.h> |
| #include <synch/spinlock.h> |
| #include <arch/context.h> |
| #include <fpu_context.h> |
| #include <arch/types.h> |
| #include <typedefs.h> |
| #include <time/timeout.h> |
| #include <synch/rwlock.h> |
| #include <config.h> |
| #include <list.h> |
| |
| #define THREAD_STACK_SIZE STACK_SIZE |
| |
| #define THREAD_USER_STACK 1 |
| |
| enum state { |
| 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. */ |
| }; |
| |
| extern char *thread_states[]; |
| |
| #define X_WIRED (1<<0) |
| #define X_STOLEN (1<<1) |
| |
| 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. */ |
| link_t threads_link; /**< Link to the list of all threads. */ |
| |
| /* items below are protected by lock */ |
| spinlock_t lock; |
| |
| void (* thread_code)(void *); /**< Function implementing the thread. */ |
| void *thread_arg; /**< Argument passed to thread_code() function. */ |
| |
| context_t saved_context; /**< From here, the stored context is restored when the thread is scheduled. */ |
| context_t sleep_timeout_context; /**< From here, the stored failover context is restored when sleep times out. */ |
| |
| 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. */ |
| |
| 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. */ |
| |
| __u64 ticks; /**< Ticks before preemption. */ |
| |
| int priority; /**< Thread's priority. Implemented as index to CPU->rq */ |
| __u32 tid; /**< Thread ID. */ |
| |
| ARCH_THREAD_DATA; /**< Architecture-specific data. */ |
| |
| __u8 *kstack; /**< Thread's kernel stack. */ |
| __u8 *ustack; /**< Thread's user stack. */ |
| }; |
| |
| extern spinlock_t threads_lock; /**< Lock protecting threads_head list. */ |
| extern link_t threads_head; /**< List of all threads in the system. */ |
| |
| extern void thread_init(void); |
| extern thread_t *thread_create(void (* func)(void *), void *arg, task_t *task, int flags); |
| extern void thread_ready(thread_t *t); |
| extern void thread_exit(void); |
| |
| extern void thread_sleep(__u32 sec); |
| extern void thread_usleep(__u32 usec); |
| |
| extern void thread_register_call_me(void (* call_me)(void *), void *call_me_with); |
| |
| #endif |