diff options
Diffstat (limited to 'ANDROID_3.4.5/include/linux/wait.h')
| -rw-r--r-- | ANDROID_3.4.5/include/linux/wait.h | 668 |
1 files changed, 0 insertions, 668 deletions
diff --git a/ANDROID_3.4.5/include/linux/wait.h b/ANDROID_3.4.5/include/linux/wait.h deleted file mode 100644 index 1dee81c4..00000000 --- a/ANDROID_3.4.5/include/linux/wait.h +++ /dev/null @@ -1,668 +0,0 @@ -#ifndef _LINUX_WAIT_H -#define _LINUX_WAIT_H - -#define WNOHANG 0x00000001 -#define WUNTRACED 0x00000002 -#define WSTOPPED WUNTRACED -#define WEXITED 0x00000004 -#define WCONTINUED 0x00000008 -#define WNOWAIT 0x01000000 /* Don't reap, just poll status. */ - -#define __WNOTHREAD 0x20000000 /* Don't wait on children of other threads in this group */ -#define __WALL 0x40000000 /* Wait on all children, regardless of type */ -#define __WCLONE 0x80000000 /* Wait only on non-SIGCHLD children */ - -/* First argument to waitid: */ -#define P_ALL 0 -#define P_PID 1 -#define P_PGID 2 - -#ifdef __KERNEL__ - -#include <linux/list.h> -#include <linux/stddef.h> -#include <linux/spinlock.h> -#include <asm/current.h> - -typedef struct __wait_queue wait_queue_t; -typedef int (*wait_queue_func_t)(wait_queue_t *wait, unsigned mode, int flags, void *key); -int default_wake_function(wait_queue_t *wait, unsigned mode, int flags, void *key); - -struct __wait_queue { - unsigned int flags; -#define WQ_FLAG_EXCLUSIVE 0x01 - void *private; - wait_queue_func_t func; - struct list_head task_list; -}; - -struct wait_bit_key { - void *flags; - int bit_nr; -}; - -struct wait_bit_queue { - struct wait_bit_key key; - wait_queue_t wait; -}; - -struct __wait_queue_head { - spinlock_t lock; - struct list_head task_list; -}; -typedef struct __wait_queue_head wait_queue_head_t; - -struct task_struct; - -/* - * Macros for declaration and initialisaton of the datatypes - */ - -#define __WAITQUEUE_INITIALIZER(name, tsk) { \ - .private = tsk, \ - .func = default_wake_function, \ - .task_list = { NULL, NULL } } - -#define DECLARE_WAITQUEUE(name, tsk) \ - wait_queue_t name = __WAITQUEUE_INITIALIZER(name, tsk) - -#define __WAIT_QUEUE_HEAD_INITIALIZER(name) { \ - .lock = __SPIN_LOCK_UNLOCKED(name.lock), \ - .task_list = { &(name).task_list, &(name).task_list } } - -#define DECLARE_WAIT_QUEUE_HEAD(name) \ - wait_queue_head_t name = __WAIT_QUEUE_HEAD_INITIALIZER(name) - -#define __WAIT_BIT_KEY_INITIALIZER(word, bit) \ - { .flags = word, .bit_nr = bit, } - -extern void __init_waitqueue_head(wait_queue_head_t *q, const char *name, struct lock_class_key *); - -#define init_waitqueue_head(q) \ - do { \ - static struct lock_class_key __key; \ - \ - __init_waitqueue_head((q), #q, &__key); \ - } while (0) - -#ifdef CONFIG_LOCKDEP -# define __WAIT_QUEUE_HEAD_INIT_ONSTACK(name) \ - ({ init_waitqueue_head(&name); name; }) -# define DECLARE_WAIT_QUEUE_HEAD_ONSTACK(name) \ - wait_queue_head_t name = __WAIT_QUEUE_HEAD_INIT_ONSTACK(name) -#else -# define DECLARE_WAIT_QUEUE_HEAD_ONSTACK(name) DECLARE_WAIT_QUEUE_HEAD(name) -#endif - -static inline void init_waitqueue_entry(wait_queue_t *q, struct task_struct *p) -{ - q->flags = 0; - q->private = p; - q->func = default_wake_function; -} - -static inline void init_waitqueue_func_entry(wait_queue_t *q, - wait_queue_func_t func) -{ - q->flags = 0; - q->private = NULL; - q->func = func; -} - -static inline int waitqueue_active(wait_queue_head_t *q) -{ - return !list_empty(&q->task_list); -} - -extern void add_wait_queue(wait_queue_head_t *q, wait_queue_t *wait); -extern void add_wait_queue_exclusive(wait_queue_head_t *q, wait_queue_t *wait); -extern void remove_wait_queue(wait_queue_head_t *q, wait_queue_t *wait); - -static inline void __add_wait_queue(wait_queue_head_t *head, wait_queue_t *new) -{ - list_add(&new->task_list, &head->task_list); -} - -/* - * Used for wake-one threads: - */ -static inline void __add_wait_queue_exclusive(wait_queue_head_t *q, - wait_queue_t *wait) -{ - wait->flags |= WQ_FLAG_EXCLUSIVE; - __add_wait_queue(q, wait); -} - -static inline void __add_wait_queue_tail(wait_queue_head_t *head, - wait_queue_t *new) -{ - list_add_tail(&new->task_list, &head->task_list); -} - -static inline void __add_wait_queue_tail_exclusive(wait_queue_head_t *q, - wait_queue_t *wait) -{ - wait->flags |= WQ_FLAG_EXCLUSIVE; - __add_wait_queue_tail(q, wait); -} - -static inline void __remove_wait_queue(wait_queue_head_t *head, - wait_queue_t *old) -{ - list_del(&old->task_list); -} - -void __wake_up(wait_queue_head_t *q, unsigned int mode, int nr, void *key); -void __wake_up_locked_key(wait_queue_head_t *q, unsigned int mode, void *key); -void __wake_up_sync_key(wait_queue_head_t *q, unsigned int mode, int nr, - void *key); -void __wake_up_locked(wait_queue_head_t *q, unsigned int mode, int nr); -void __wake_up_sync(wait_queue_head_t *q, unsigned int mode, int nr); -void __wake_up_bit(wait_queue_head_t *, void *, int); -int __wait_on_bit(wait_queue_head_t *, struct wait_bit_queue *, int (*)(void *), unsigned); -int __wait_on_bit_lock(wait_queue_head_t *, struct wait_bit_queue *, int (*)(void *), unsigned); -void wake_up_bit(void *, int); -int out_of_line_wait_on_bit(void *, int, int (*)(void *), unsigned); -int out_of_line_wait_on_bit_lock(void *, int, int (*)(void *), unsigned); -wait_queue_head_t *bit_waitqueue(void *, int); - -#define wake_up(x) __wake_up(x, TASK_NORMAL, 1, NULL) -#define wake_up_nr(x, nr) __wake_up(x, TASK_NORMAL, nr, NULL) -#define wake_up_all(x) __wake_up(x, TASK_NORMAL, 0, NULL) -#define wake_up_locked(x) __wake_up_locked((x), TASK_NORMAL, 1) -#define wake_up_all_locked(x) __wake_up_locked((x), TASK_NORMAL, 0) - -#define wake_up_interruptible(x) __wake_up(x, TASK_INTERRUPTIBLE, 1, NULL) -#define wake_up_interruptible_nr(x, nr) __wake_up(x, TASK_INTERRUPTIBLE, nr, NULL) -#define wake_up_interruptible_all(x) __wake_up(x, TASK_INTERRUPTIBLE, 0, NULL) -#define wake_up_interruptible_sync(x) __wake_up_sync((x), TASK_INTERRUPTIBLE, 1) - -/* - * Wakeup macros to be used to report events to the targets. - */ -#define wake_up_poll(x, m) \ - __wake_up(x, TASK_NORMAL, 1, (void *) (m)) -#define wake_up_locked_poll(x, m) \ - __wake_up_locked_key((x), TASK_NORMAL, (void *) (m)) -#define wake_up_interruptible_poll(x, m) \ - __wake_up(x, TASK_INTERRUPTIBLE, 1, (void *) (m)) -#define wake_up_interruptible_sync_poll(x, m) \ - __wake_up_sync_key((x), TASK_INTERRUPTIBLE, 1, (void *) (m)) - -#define __wait_event(wq, condition) \ -do { \ - DEFINE_WAIT(__wait); \ - \ - for (;;) { \ - prepare_to_wait(&wq, &__wait, TASK_UNINTERRUPTIBLE); \ - if (condition) \ - break; \ - schedule(); \ - } \ - finish_wait(&wq, &__wait); \ -} while (0) - -/** - * wait_event - sleep until a condition gets true - * @wq: the waitqueue to wait on - * @condition: a C expression for the event to wait for - * - * The process is put to sleep (TASK_UNINTERRUPTIBLE) until the - * @condition evaluates to true. The @condition is checked each time - * the waitqueue @wq is woken up. - * - * wake_up() has to be called after changing any variable that could - * change the result of the wait condition. - */ -#define wait_event(wq, condition) \ -do { \ - if (condition) \ - break; \ - __wait_event(wq, condition); \ -} while (0) - -#define __wait_event_timeout(wq, condition, ret) \ -do { \ - DEFINE_WAIT(__wait); \ - \ - for (;;) { \ - prepare_to_wait(&wq, &__wait, TASK_UNINTERRUPTIBLE); \ - if (condition) \ - break; \ - ret = schedule_timeout(ret); \ - if (!ret) \ - break; \ - } \ - finish_wait(&wq, &__wait); \ -} while (0) - -/** - * wait_event_timeout - sleep until a condition gets true or a timeout elapses - * @wq: the waitqueue to wait on - * @condition: a C expression for the event to wait for - * @timeout: timeout, in jiffies - * - * The process is put to sleep (TASK_UNINTERRUPTIBLE) until the - * @condition evaluates to true. The @condition is checked each time - * the waitqueue @wq is woken up. - * - * wake_up() has to be called after changing any variable that could - * change the result of the wait condition. - * - * The function returns 0 if the @timeout elapsed, and the remaining - * jiffies if the condition evaluated to true before the timeout elapsed. - */ -#define wait_event_timeout(wq, condition, timeout) \ -({ \ - long __ret = timeout; \ - if (!(condition)) \ - __wait_event_timeout(wq, condition, __ret); \ - __ret; \ -}) - -#define __wait_event_interruptible(wq, condition, ret) \ -do { \ - DEFINE_WAIT(__wait); \ - \ - for (;;) { \ - prepare_to_wait(&wq, &__wait, TASK_INTERRUPTIBLE); \ - if (condition) \ - break; \ - if (!signal_pending(current)) { \ - schedule(); \ - continue; \ - } \ - ret = -ERESTARTSYS; \ - break; \ - } \ - finish_wait(&wq, &__wait); \ -} while (0) - -/** - * wait_event_interruptible - sleep until a condition gets true - * @wq: the waitqueue to wait on - * @condition: a C expression for the event to wait for - * - * The process is put to sleep (TASK_INTERRUPTIBLE) until the - * @condition evaluates to true or a signal is received. - * The @condition is checked each time the waitqueue @wq is woken up. - * - * wake_up() has to be called after changing any variable that could - * change the result of the wait condition. - * - * The function will return -ERESTARTSYS if it was interrupted by a - * signal and 0 if @condition evaluated to true. - */ -#define wait_event_interruptible(wq, condition) \ -({ \ - int __ret = 0; \ - if (!(condition)) \ - __wait_event_interruptible(wq, condition, __ret); \ - __ret; \ -}) - -#define __wait_event_interruptible_timeout(wq, condition, ret) \ -do { \ - DEFINE_WAIT(__wait); \ - \ - for (;;) { \ - prepare_to_wait(&wq, &__wait, TASK_INTERRUPTIBLE); \ - if (condition) \ - break; \ - if (!signal_pending(current)) { \ - ret = schedule_timeout(ret); \ - if (!ret) \ - break; \ - continue; \ - } \ - ret = -ERESTARTSYS; \ - break; \ - } \ - finish_wait(&wq, &__wait); \ -} while (0) - -/** - * wait_event_interruptible_timeout - sleep until a condition gets true or a timeout elapses - * @wq: the waitqueue to wait on - * @condition: a C expression for the event to wait for - * @timeout: timeout, in jiffies - * - * The process is put to sleep (TASK_INTERRUPTIBLE) until the - * @condition evaluates to true or a signal is received. - * The @condition is checked each time the waitqueue @wq is woken up. - * - * wake_up() has to be called after changing any variable that could - * change the result of the wait condition. - * - * The function returns 0 if the @timeout elapsed, -ERESTARTSYS if it - * was interrupted by a signal, and the remaining jiffies otherwise - * if the condition evaluated to true before the timeout elapsed. - */ -#define wait_event_interruptible_timeout(wq, condition, timeout) \ -({ \ - long __ret = timeout; \ - if (!(condition)) \ - __wait_event_interruptible_timeout(wq, condition, __ret); \ - __ret; \ -}) - -#define __wait_event_interruptible_exclusive(wq, condition, ret) \ -do { \ - DEFINE_WAIT(__wait); \ - \ - for (;;) { \ - prepare_to_wait_exclusive(&wq, &__wait, \ - TASK_INTERRUPTIBLE); \ - if (condition) { \ - finish_wait(&wq, &__wait); \ - break; \ - } \ - if (!signal_pending(current)) { \ - schedule(); \ - continue; \ - } \ - ret = -ERESTARTSYS; \ - abort_exclusive_wait(&wq, &__wait, \ - TASK_INTERRUPTIBLE, NULL); \ - break; \ - } \ -} while (0) - -#define wait_event_interruptible_exclusive(wq, condition) \ -({ \ - int __ret = 0; \ - if (!(condition)) \ - __wait_event_interruptible_exclusive(wq, condition, __ret);\ - __ret; \ -}) - - -#define __wait_event_interruptible_locked(wq, condition, exclusive, irq) \ -({ \ - int __ret = 0; \ - DEFINE_WAIT(__wait); \ - if (exclusive) \ - __wait.flags |= WQ_FLAG_EXCLUSIVE; \ - do { \ - if (likely(list_empty(&__wait.task_list))) \ - __add_wait_queue_tail(&(wq), &__wait); \ - set_current_state(TASK_INTERRUPTIBLE); \ - if (signal_pending(current)) { \ - __ret = -ERESTARTSYS; \ - break; \ - } \ - if (irq) \ - spin_unlock_irq(&(wq).lock); \ - else \ - spin_unlock(&(wq).lock); \ - schedule(); \ - if (irq) \ - spin_lock_irq(&(wq).lock); \ - else \ - spin_lock(&(wq).lock); \ - } while (!(condition)); \ - __remove_wait_queue(&(wq), &__wait); \ - __set_current_state(TASK_RUNNING); \ - __ret; \ -}) - - -/** - * wait_event_interruptible_locked - sleep until a condition gets true - * @wq: the waitqueue to wait on - * @condition: a C expression for the event to wait for - * - * The process is put to sleep (TASK_INTERRUPTIBLE) until the - * @condition evaluates to true or a signal is received. - * The @condition is checked each time the waitqueue @wq is woken up. - * - * It must be called with wq.lock being held. This spinlock is - * unlocked while sleeping but @condition testing is done while lock - * is held and when this macro exits the lock is held. - * - * The lock is locked/unlocked using spin_lock()/spin_unlock() - * functions which must match the way they are locked/unlocked outside - * of this macro. - * - * wake_up_locked() has to be called after changing any variable that could - * change the result of the wait condition. - * - * The function will return -ERESTARTSYS if it was interrupted by a - * signal and 0 if @condition evaluated to true. - */ -#define wait_event_interruptible_locked(wq, condition) \ - ((condition) \ - ? 0 : __wait_event_interruptible_locked(wq, condition, 0, 0)) - -/** - * wait_event_interruptible_locked_irq - sleep until a condition gets true - * @wq: the waitqueue to wait on - * @condition: a C expression for the event to wait for - * - * The process is put to sleep (TASK_INTERRUPTIBLE) until the - * @condition evaluates to true or a signal is received. - * The @condition is checked each time the waitqueue @wq is woken up. - * - * It must be called with wq.lock being held. This spinlock is - * unlocked while sleeping but @condition testing is done while lock - * is held and when this macro exits the lock is held. - * - * The lock is locked/unlocked using spin_lock_irq()/spin_unlock_irq() - * functions which must match the way they are locked/unlocked outside - * of this macro. - * - * wake_up_locked() has to be called after changing any variable that could - * change the result of the wait condition. - * - * The function will return -ERESTARTSYS if it was interrupted by a - * signal and 0 if @condition evaluated to true. - */ -#define wait_event_interruptible_locked_irq(wq, condition) \ - ((condition) \ - ? 0 : __wait_event_interruptible_locked(wq, condition, 0, 1)) - -/** - * wait_event_interruptible_exclusive_locked - sleep exclusively until a condition gets true - * @wq: the waitqueue to wait on - * @condition: a C expression for the event to wait for - * - * The process is put to sleep (TASK_INTERRUPTIBLE) until the - * @condition evaluates to true or a signal is received. - * The @condition is checked each time the waitqueue @wq is woken up. - * - * It must be called with wq.lock being held. This spinlock is - * unlocked while sleeping but @condition testing is done while lock - * is held and when this macro exits the lock is held. - * - * The lock is locked/unlocked using spin_lock()/spin_unlock() - * functions which must match the way they are locked/unlocked outside - * of this macro. - * - * The process is put on the wait queue with an WQ_FLAG_EXCLUSIVE flag - * set thus when other process waits process on the list if this - * process is awaken further processes are not considered. - * - * wake_up_locked() has to be called after changing any variable that could - * change the result of the wait condition. - * - * The function will return -ERESTARTSYS if it was interrupted by a - * signal and 0 if @condition evaluated to true. - */ -#define wait_event_interruptible_exclusive_locked(wq, condition) \ - ((condition) \ - ? 0 : __wait_event_interruptible_locked(wq, condition, 1, 0)) - -/** - * wait_event_interruptible_exclusive_locked_irq - sleep until a condition gets true - * @wq: the waitqueue to wait on - * @condition: a C expression for the event to wait for - * - * The process is put to sleep (TASK_INTERRUPTIBLE) until the - * @condition evaluates to true or a signal is received. - * The @condition is checked each time the waitqueue @wq is woken up. - * - * It must be called with wq.lock being held. This spinlock is - * unlocked while sleeping but @condition testing is done while lock - * is held and when this macro exits the lock is held. - * - * The lock is locked/unlocked using spin_lock_irq()/spin_unlock_irq() - * functions which must match the way they are locked/unlocked outside - * of this macro. - * - * The process is put on the wait queue with an WQ_FLAG_EXCLUSIVE flag - * set thus when other process waits process on the list if this - * process is awaken further processes are not considered. - * - * wake_up_locked() has to be called after changing any variable that could - * change the result of the wait condition. - * - * The function will return -ERESTARTSYS if it was interrupted by a - * signal and 0 if @condition evaluated to true. - */ -#define wait_event_interruptible_exclusive_locked_irq(wq, condition) \ - ((condition) \ - ? 0 : __wait_event_interruptible_locked(wq, condition, 1, 1)) - - - -#define __wait_event_killable(wq, condition, ret) \ -do { \ - DEFINE_WAIT(__wait); \ - \ - for (;;) { \ - prepare_to_wait(&wq, &__wait, TASK_KILLABLE); \ - if (condition) \ - break; \ - if (!fatal_signal_pending(current)) { \ - schedule(); \ - continue; \ - } \ - ret = -ERESTARTSYS; \ - break; \ - } \ - finish_wait(&wq, &__wait); \ -} while (0) - -/** - * wait_event_killable - sleep until a condition gets true - * @wq: the waitqueue to wait on - * @condition: a C expression for the event to wait for - * - * The process is put to sleep (TASK_KILLABLE) until the - * @condition evaluates to true or a signal is received. - * The @condition is checked each time the waitqueue @wq is woken up. - * - * wake_up() has to be called after changing any variable that could - * change the result of the wait condition. - * - * The function will return -ERESTARTSYS if it was interrupted by a - * signal and 0 if @condition evaluated to true. - */ -#define wait_event_killable(wq, condition) \ -({ \ - int __ret = 0; \ - if (!(condition)) \ - __wait_event_killable(wq, condition, __ret); \ - __ret; \ -}) - -/* - * These are the old interfaces to sleep waiting for an event. - * They are racy. DO NOT use them, use the wait_event* interfaces above. - * We plan to remove these interfaces. - */ -extern void sleep_on(wait_queue_head_t *q); -extern long sleep_on_timeout(wait_queue_head_t *q, - signed long timeout); -extern void interruptible_sleep_on(wait_queue_head_t *q); -extern long interruptible_sleep_on_timeout(wait_queue_head_t *q, - signed long timeout); - -/* - * Waitqueues which are removed from the waitqueue_head at wakeup time - */ -void prepare_to_wait(wait_queue_head_t *q, wait_queue_t *wait, int state); -void prepare_to_wait_exclusive(wait_queue_head_t *q, wait_queue_t *wait, int state); -void finish_wait(wait_queue_head_t *q, wait_queue_t *wait); -void abort_exclusive_wait(wait_queue_head_t *q, wait_queue_t *wait, - unsigned int mode, void *key); -int autoremove_wake_function(wait_queue_t *wait, unsigned mode, int sync, void *key); -int wake_bit_function(wait_queue_t *wait, unsigned mode, int sync, void *key); - -#define DEFINE_WAIT_FUNC(name, function) \ - wait_queue_t name = { \ - .private = current, \ - .func = function, \ - .task_list = LIST_HEAD_INIT((name).task_list), \ - } - -#define DEFINE_WAIT(name) DEFINE_WAIT_FUNC(name, autoremove_wake_function) - -#define DEFINE_WAIT_BIT(name, word, bit) \ - struct wait_bit_queue name = { \ - .key = __WAIT_BIT_KEY_INITIALIZER(word, bit), \ - .wait = { \ - .private = current, \ - .func = wake_bit_function, \ - .task_list = \ - LIST_HEAD_INIT((name).wait.task_list), \ - }, \ - } - -#define init_wait(wait) \ - do { \ - (wait)->private = current; \ - (wait)->func = autoremove_wake_function; \ - INIT_LIST_HEAD(&(wait)->task_list); \ - (wait)->flags = 0; \ - } while (0) - -/** - * wait_on_bit - wait for a bit to be cleared - * @word: the word being waited on, a kernel virtual address - * @bit: the bit of the word being waited on - * @action: the function used to sleep, which may take special actions - * @mode: the task state to sleep in - * - * There is a standard hashed waitqueue table for generic use. This - * is the part of the hashtable's accessor API that waits on a bit. - * For instance, if one were to have waiters on a bitflag, one would - * call wait_on_bit() in threads waiting for the bit to clear. - * One uses wait_on_bit() where one is waiting for the bit to clear, - * but has no intention of setting it. - */ -static inline int wait_on_bit(void *word, int bit, - int (*action)(void *), unsigned mode) -{ - if (!test_bit(bit, word)) - return 0; - return out_of_line_wait_on_bit(word, bit, action, mode); -} - -/** - * wait_on_bit_lock - wait for a bit to be cleared, when wanting to set it - * @word: the word being waited on, a kernel virtual address - * @bit: the bit of the word being waited on - * @action: the function used to sleep, which may take special actions - * @mode: the task state to sleep in - * - * There is a standard hashed waitqueue table for generic use. This - * is the part of the hashtable's accessor API that waits on a bit - * when one intends to set it, for instance, trying to lock bitflags. - * For instance, if one were to have waiters trying to set bitflag - * and waiting for it to clear before setting it, one would call - * wait_on_bit() in threads waiting to be able to set the bit. - * One uses wait_on_bit_lock() where one is waiting for the bit to - * clear with the intention of setting it, and when done, clearing it. - */ -static inline int wait_on_bit_lock(void *word, int bit, - int (*action)(void *), unsigned mode) -{ - if (!test_and_set_bit(bit, word)) - return 0; - return out_of_line_wait_on_bit_lock(word, bit, action, mode); -} - -#endif /* __KERNEL__ */ - -#endif |