35,129 → 35,25 |
#ifndef KERN_THREAD_H_ |
#define KERN_THREAD_H_ |
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#include <arch/proc/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/waitq.h> |
#include <proc/task.h> |
#include <cpu.h> |
#include <synch/rwlock.h> |
#include <synch/synch.h> |
#include <config.h> |
#include <adt/btree.h> |
#include <adt/list.h> |
#include <mm/slab.h> |
#include <arch/cpu.h> |
#include <mm/tlb.h> |
#include <proc/uarg.h> |
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#define THREAD_STACK_SIZE STACK_SIZE |
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/** 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; |
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extern char *thread_states[]; |
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/** 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; |
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/* Thread flags */ |
#define THREAD_FLAG_WIRED (1<<0) /**< Thread cannot be migrated to another CPU. */ |
#define THREAD_FLAG_STOLEN (1<<1) /**< Thread was migrated to another CPU and has not run yet. */ |
#define THREAD_FLAG_USPACE (1<<2) /**< Thread executes in userspace. */ |
#define THREAD_FLAG_WIRED (1 << 0) /**< Thread cannot be migrated to another CPU. */ |
#define THREAD_FLAG_STOLEN (1 << 1) /**< Thread was migrated to another CPU and has not run yet. */ |
#define THREAD_FLAG_USPACE (1 << 2) /**< Thread executes in userspace. */ |
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#define THREAD_NAME_BUFLEN 20 |
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/** Thread structure. There is one per thread. */ |
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. */ |
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/** Lock protecting thread structure. |
* |
* Protects the whole thread structure except list links above. |
*/ |
SPINLOCK_DECLARE(lock); |
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char name[THREAD_NAME_BUFLEN]; |
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void (* thread_code)(void *); /**< Function implementing the thread. */ |
void *thread_arg; /**< Argument passed to thread_code() function. */ |
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/** 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; |
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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. */ |
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/** 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; |
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/** |
* If true, the thread will not go to sleep at all and will |
* call thread_exit() before returning to userspace. |
*/ |
bool interrupted; |
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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(). */ |
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fpu_context_t *saved_fpu_context; |
int fpu_context_exists; |
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/* |
* 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; |
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rwlock_type_t rwlock_holder_type; |
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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(). */ |
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state_t state; /**< Thread's state. */ |
int flags; /**< Thread's flags. */ |
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cpu_t *cpu; /**< Thread's CPU. */ |
task_t *task; /**< Containing task. */ |
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uint64_t ticks; /**< Ticks before preemption. */ |
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uint64_t cycles; /**< Thread accounting. */ |
uint64_t last_cycle; /**< Last sampled cycle. */ |
bool uncounted; /**< Thread doesn't affect accumulated accounting. */ |
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int priority; /**< Thread's priority. Implemented as index to CPU->rq */ |
uint32_t tid; /**< Thread ID. */ |
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thread_arch_t arch; /**< Architecture-specific data. */ |
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uint8_t *kstack; /**< Thread's kernel stack. */ |
}; |
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/** Thread list lock. |
* |
* This lock protects all link_t structures chained in threads_head. |
195,6 → 91,7 |
extern void thread_destroy(thread_t *t); |
extern void thread_update_accounting(void); |
extern bool thread_exists(thread_t *t); |
extern void thread_interrupt_sleep(thread_t *t); |
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/* Fpu context slab cache */ |
extern slab_cache_t *fpu_context_slab; |