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| Rev 177 | Rev 410 | ||
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| Line 43... | Line 43... | ||
| 43 | #define THREAD_STACK_SIZE STACK_SIZE |
43 | #define THREAD_STACK_SIZE STACK_SIZE |
| 44 | 44 | ||
| 45 | #define THREAD_USER_STACK 1 |
45 | #define THREAD_USER_STACK 1 |
| 46 | 46 | ||
| 47 | enum state { |
47 | enum state { |
| 48 | Invalid, |
48 | Invalid, /**< It is an error, if thread is found in this state. */ |
| 49 | Running, |
49 | Running, /**< State of a thread that is currently executing on some CPU. */ |
| 50 | Sleeping, |
50 | Sleeping, /**< Thread in this state is waiting for an event. */ |
| 51 | Ready, |
51 | Ready, /**< State of threads in a run queue. */ |
| 52 | Entering, |
52 | Entering, /**< Threads are in this state before they are first readied. */ |
| 53 | Exiting |
53 | Exiting /**< After a thread calls thread_exit(), it is put into Exiting state. */ |
| 54 | }; |
54 | }; |
| 55 | 55 | ||
| 56 | extern char *thread_states[]; |
56 | extern char *thread_states[]; |
| 57 | 57 | ||
| 58 | #define X_WIRED (1<<0) |
58 | #define X_WIRED (1<<0) |
| 59 | #define X_STOLEN (1<<1) |
59 | #define X_STOLEN (1<<1) |
| 60 | 60 | ||
| 61 | struct thread { |
61 | struct thread { |
| 62 | link_t rq_link; /* run queue link */ |
62 | link_t rq_link; /**< Run queue link. */ |
| 63 | link_t wq_link; /* wait queue link */ |
63 | link_t wq_link; /**< Wait queue link. */ |
| 64 | link_t th_link; /* links to threads within the parent task*/ |
64 | link_t th_link; /**< Links to threads within containing task. */ |
| 65 | link_t threads_link; |
65 | link_t threads_link; /**< Link to the list of all threads. */ |
| 66 | 66 | ||
| 67 | /* items below are protected by lock */ |
67 | /* items below are protected by lock */ |
| 68 | spinlock_t lock; |
68 | spinlock_t lock; |
| 69 | 69 | ||
| 70 | void (* thread_code)(void *); |
70 | void (* thread_code)(void *); /**< Function implementing the thread. */ |
| 71 | void *thread_arg; |
71 | void *thread_arg; /**< Argument passed to thread_code() function. */ |
| - | 72 | ||
| - | 73 | context_t saved_context; /**< From here, the stored context is restored when the thread is scheduled. */ |
|
| - | 74 | context_t sleep_timeout_context; /**< From here, the stored failover context is restored when sleep times out. */ |
|
| - | 75 | ||
| - | 76 | waitq_t *sleep_queue; /**< Wait queue in which this thread sleeps. */ |
|
| - | 77 | timeout_t sleep_timeout; /**< Timeout used for timeoutable sleeping. */ |
|
| - | 78 | volatile int timeout_pending; /**< Flag signalling sleep timeout in progress. */ |
|
| 72 | 79 | ||
| 73 | context_t saved_context; |
- | |
| 74 | context_t sleep_timeout_context; |
- | |
| 75 | fpu_context_t saved_fpu_context; |
80 | fpu_context_t saved_fpu_context; |
| 76 | int fpu_context_exists; |
81 | int fpu_context_exists; |
| 77 | 82 | ||
| 78 | /* |
83 | /* |
| 79 | * Defined only if thread doesn't run. |
84 | * Defined only if thread doesn't run. |
| 80 | * It means that fpu context is in CPU that last time executes this thread. |
85 | * It means that fpu context is in CPU that last time executes this thread. |
| 81 | * This disables migration |
86 | * This disables migration |
| 82 | */ |
87 | */ |
| 83 | int fpu_context_engaged; |
88 | int fpu_context_engaged; |
| 84 | 89 | ||
| 85 | waitq_t *sleep_queue; |
- | |
| 86 | timeout_t sleep_timeout; |
- | |
| 87 | volatile int timeout_pending; |
- | |
| 88 | - | ||
| 89 | rwlock_type_t rwlock_holder_type; |
90 | rwlock_type_t rwlock_holder_type; |
| 90 | void (* call_me)(void *); |
- | |
| 91 | void *call_me_with; |
- | |
| 92 | 91 | ||
| - | 92 | void (* call_me)(void *); /**< Funtion to be called in scheduler before the thread is put asleep. */ |
|
| - | 93 | void *call_me_with; /**< Argument passed to call_me(). */ |
|
| - | 94 | ||
| 93 | int state; |
95 | state_t state; /**< Thread's state. */ |
| 94 | int flags; |
96 | int flags; /**< Thread's flags. */ |
| 95 | 97 | ||
| 96 | cpu_t *cpu; |
98 | cpu_t *cpu; /**< Thread's CPU. */ |
| 97 | task_t *task; |
99 | task_t *task; /**< Containing task. */ |
| 98 | 100 | ||
| 99 | __u64 ticks; |
101 | __u64 ticks; /**< Ticks before preemption. */ |
| 100 | 102 | ||
| - | 103 | int pri; /**< Thread's priority. Implemented as index of run queue. */ |
|
| 101 | __u32 tid; |
104 | __u32 tid; /**< Thread ID. */ |
| 102 | - | ||
| 103 | int pri; |
- | |
| 104 | 105 | ||
| 105 | ARCH_THREAD_DATA; |
106 | ARCH_THREAD_DATA; /**< Architecture-specific data. */ |
| 106 | 107 | ||
| 107 | __u8 *kstack; |
108 | __u8 *kstack; /**< Thread's kernel stack. */ |
| 108 | __u8 *ustack; |
109 | __u8 *ustack; /**< Thread's user stack. */ |
| 109 | }; |
110 | }; |
| 110 | 111 | ||
| 111 | extern spinlock_t threads_lock; |
112 | extern spinlock_t threads_lock; /**< Lock protecting threads_head list. */ |
| 112 | extern link_t threads_head; |
113 | extern link_t threads_head; /**< List of all threads in the system. */ |
| 113 | 114 | ||
| 114 | static void cushion(void); |
115 | static void cushion(void); |
| 115 | 116 | ||
| 116 | extern void thread_init(void); |
117 | extern void thread_init(void); |
| 117 | extern thread_t *thread_create(void (* func)(void *), void *arg, task_t *task, int flags); |
118 | extern thread_t *thread_create(void (* func)(void *), void *arg, task_t *task, int flags); |