diff options
Diffstat (limited to 'ANDROID_3.4.5/include/linux/workqueue.h')
-rw-r--r-- | ANDROID_3.4.5/include/linux/workqueue.h | 450 |
1 files changed, 0 insertions, 450 deletions
diff --git a/ANDROID_3.4.5/include/linux/workqueue.h b/ANDROID_3.4.5/include/linux/workqueue.h deleted file mode 100644 index af155450..00000000 --- a/ANDROID_3.4.5/include/linux/workqueue.h +++ /dev/null @@ -1,450 +0,0 @@ -/* - * workqueue.h --- work queue handling for Linux. - */ - -#ifndef _LINUX_WORKQUEUE_H -#define _LINUX_WORKQUEUE_H - -#include <linux/timer.h> -#include <linux/linkage.h> -#include <linux/bitops.h> -#include <linux/lockdep.h> -#include <linux/threads.h> -#include <linux/atomic.h> - -struct workqueue_struct; - -struct work_struct; -typedef void (*work_func_t)(struct work_struct *work); - -/* - * The first word is the work queue pointer and the flags rolled into - * one - */ -#define work_data_bits(work) ((unsigned long *)(&(work)->data)) - -enum { - WORK_STRUCT_PENDING_BIT = 0, /* work item is pending execution */ - WORK_STRUCT_DELAYED_BIT = 1, /* work item is delayed */ - WORK_STRUCT_CWQ_BIT = 2, /* data points to cwq */ - WORK_STRUCT_LINKED_BIT = 3, /* next work is linked to this one */ -#ifdef CONFIG_DEBUG_OBJECTS_WORK - WORK_STRUCT_STATIC_BIT = 4, /* static initializer (debugobjects) */ - WORK_STRUCT_COLOR_SHIFT = 5, /* color for workqueue flushing */ -#else - WORK_STRUCT_COLOR_SHIFT = 4, /* color for workqueue flushing */ -#endif - - WORK_STRUCT_COLOR_BITS = 4, - - WORK_STRUCT_PENDING = 1 << WORK_STRUCT_PENDING_BIT, - WORK_STRUCT_DELAYED = 1 << WORK_STRUCT_DELAYED_BIT, - WORK_STRUCT_CWQ = 1 << WORK_STRUCT_CWQ_BIT, - WORK_STRUCT_LINKED = 1 << WORK_STRUCT_LINKED_BIT, -#ifdef CONFIG_DEBUG_OBJECTS_WORK - WORK_STRUCT_STATIC = 1 << WORK_STRUCT_STATIC_BIT, -#else - WORK_STRUCT_STATIC = 0, -#endif - - /* - * The last color is no color used for works which don't - * participate in workqueue flushing. - */ - WORK_NR_COLORS = (1 << WORK_STRUCT_COLOR_BITS) - 1, - WORK_NO_COLOR = WORK_NR_COLORS, - - /* special cpu IDs */ - WORK_CPU_UNBOUND = NR_CPUS, - WORK_CPU_NONE = NR_CPUS + 1, - WORK_CPU_LAST = WORK_CPU_NONE, - - /* - * Reserve 7 bits off of cwq pointer w/ debugobjects turned - * off. This makes cwqs aligned to 256 bytes and allows 15 - * workqueue flush colors. - */ - WORK_STRUCT_FLAG_BITS = WORK_STRUCT_COLOR_SHIFT + - WORK_STRUCT_COLOR_BITS, - - WORK_STRUCT_FLAG_MASK = (1UL << WORK_STRUCT_FLAG_BITS) - 1, - WORK_STRUCT_WQ_DATA_MASK = ~WORK_STRUCT_FLAG_MASK, - WORK_STRUCT_NO_CPU = WORK_CPU_NONE << WORK_STRUCT_FLAG_BITS, - - /* bit mask for work_busy() return values */ - WORK_BUSY_PENDING = 1 << 0, - WORK_BUSY_RUNNING = 1 << 1, -}; - -struct work_struct { - atomic_long_t data; - struct list_head entry; - work_func_t func; -#ifdef CONFIG_LOCKDEP - struct lockdep_map lockdep_map; -#endif -}; - -#define WORK_DATA_INIT() ATOMIC_LONG_INIT(WORK_STRUCT_NO_CPU) -#define WORK_DATA_STATIC_INIT() \ - ATOMIC_LONG_INIT(WORK_STRUCT_NO_CPU | WORK_STRUCT_STATIC) - -struct delayed_work { - struct work_struct work; - struct timer_list timer; -}; - -static inline struct delayed_work *to_delayed_work(struct work_struct *work) -{ - return container_of(work, struct delayed_work, work); -} - -struct execute_work { - struct work_struct work; -}; - -#ifdef CONFIG_LOCKDEP -/* - * NB: because we have to copy the lockdep_map, setting _key - * here is required, otherwise it could get initialised to the - * copy of the lockdep_map! - */ -#define __WORK_INIT_LOCKDEP_MAP(n, k) \ - .lockdep_map = STATIC_LOCKDEP_MAP_INIT(n, k), -#else -#define __WORK_INIT_LOCKDEP_MAP(n, k) -#endif - -#define __WORK_INITIALIZER(n, f) { \ - .data = WORK_DATA_STATIC_INIT(), \ - .entry = { &(n).entry, &(n).entry }, \ - .func = (f), \ - __WORK_INIT_LOCKDEP_MAP(#n, &(n)) \ - } - -#define __DELAYED_WORK_INITIALIZER(n, f) { \ - .work = __WORK_INITIALIZER((n).work, (f)), \ - .timer = TIMER_INITIALIZER(NULL, 0, 0), \ - } - -#define __DEFERRED_WORK_INITIALIZER(n, f) { \ - .work = __WORK_INITIALIZER((n).work, (f)), \ - .timer = TIMER_DEFERRED_INITIALIZER(NULL, 0, 0), \ - } - -#define DECLARE_WORK(n, f) \ - struct work_struct n = __WORK_INITIALIZER(n, f) - -#define DECLARE_DELAYED_WORK(n, f) \ - struct delayed_work n = __DELAYED_WORK_INITIALIZER(n, f) - -#define DECLARE_DEFERRED_WORK(n, f) \ - struct delayed_work n = __DEFERRED_WORK_INITIALIZER(n, f) - -/* - * initialize a work item's function pointer - */ -#define PREPARE_WORK(_work, _func) \ - do { \ - (_work)->func = (_func); \ - } while (0) - -#define PREPARE_DELAYED_WORK(_work, _func) \ - PREPARE_WORK(&(_work)->work, (_func)) - -#ifdef CONFIG_DEBUG_OBJECTS_WORK -extern void __init_work(struct work_struct *work, int onstack); -extern void destroy_work_on_stack(struct work_struct *work); -static inline unsigned int work_static(struct work_struct *work) -{ - return *work_data_bits(work) & WORK_STRUCT_STATIC; -} -#else -static inline void __init_work(struct work_struct *work, int onstack) { } -static inline void destroy_work_on_stack(struct work_struct *work) { } -static inline unsigned int work_static(struct work_struct *work) { return 0; } -#endif - -/* - * initialize all of a work item in one go - * - * NOTE! No point in using "atomic_long_set()": using a direct - * assignment of the work data initializer allows the compiler - * to generate better code. - */ -#ifdef CONFIG_LOCKDEP -#define __INIT_WORK(_work, _func, _onstack) \ - do { \ - static struct lock_class_key __key; \ - \ - __init_work((_work), _onstack); \ - (_work)->data = (atomic_long_t) WORK_DATA_INIT(); \ - lockdep_init_map(&(_work)->lockdep_map, #_work, &__key, 0);\ - INIT_LIST_HEAD(&(_work)->entry); \ - PREPARE_WORK((_work), (_func)); \ - } while (0) -#else -#define __INIT_WORK(_work, _func, _onstack) \ - do { \ - __init_work((_work), _onstack); \ - (_work)->data = (atomic_long_t) WORK_DATA_INIT(); \ - INIT_LIST_HEAD(&(_work)->entry); \ - PREPARE_WORK((_work), (_func)); \ - } while (0) -#endif - -#define INIT_WORK(_work, _func) \ - do { \ - __INIT_WORK((_work), (_func), 0); \ - } while (0) - -#define INIT_WORK_ONSTACK(_work, _func) \ - do { \ - __INIT_WORK((_work), (_func), 1); \ - } while (0) - -#define INIT_DELAYED_WORK(_work, _func) \ - do { \ - INIT_WORK(&(_work)->work, (_func)); \ - init_timer(&(_work)->timer); \ - } while (0) - -#define INIT_DELAYED_WORK_ONSTACK(_work, _func) \ - do { \ - INIT_WORK_ONSTACK(&(_work)->work, (_func)); \ - init_timer_on_stack(&(_work)->timer); \ - } while (0) - -#define INIT_DELAYED_WORK_DEFERRABLE(_work, _func) \ - do { \ - INIT_WORK(&(_work)->work, (_func)); \ - init_timer_deferrable(&(_work)->timer); \ - } while (0) - -/** - * work_pending - Find out whether a work item is currently pending - * @work: The work item in question - */ -#define work_pending(work) \ - test_bit(WORK_STRUCT_PENDING_BIT, work_data_bits(work)) - -/** - * delayed_work_pending - Find out whether a delayable work item is currently - * pending - * @work: The work item in question - */ -#define delayed_work_pending(w) \ - work_pending(&(w)->work) - -/** - * work_clear_pending - for internal use only, mark a work item as not pending - * @work: The work item in question - */ -#define work_clear_pending(work) \ - clear_bit(WORK_STRUCT_PENDING_BIT, work_data_bits(work)) - -/* - * Workqueue flags and constants. For details, please refer to - * Documentation/workqueue.txt. - */ -enum { - WQ_NON_REENTRANT = 1 << 0, /* guarantee non-reentrance */ - WQ_UNBOUND = 1 << 1, /* not bound to any cpu */ - WQ_FREEZABLE = 1 << 2, /* freeze during suspend */ - WQ_MEM_RECLAIM = 1 << 3, /* may be used for memory reclaim */ - WQ_HIGHPRI = 1 << 4, /* high priority */ - WQ_CPU_INTENSIVE = 1 << 5, /* cpu instensive workqueue */ - - WQ_DRAINING = 1 << 6, /* internal: workqueue is draining */ - WQ_RESCUER = 1 << 7, /* internal: workqueue has rescuer */ - - WQ_MAX_ACTIVE = 512, /* I like 512, better ideas? */ - WQ_MAX_UNBOUND_PER_CPU = 4, /* 4 * #cpus for unbound wq */ - WQ_DFL_ACTIVE = WQ_MAX_ACTIVE / 2, -}; - -/* unbound wq's aren't per-cpu, scale max_active according to #cpus */ -#define WQ_UNBOUND_MAX_ACTIVE \ - max_t(int, WQ_MAX_ACTIVE, num_possible_cpus() * WQ_MAX_UNBOUND_PER_CPU) - -/* - * System-wide workqueues which are always present. - * - * system_wq is the one used by schedule[_delayed]_work[_on](). - * Multi-CPU multi-threaded. There are users which expect relatively - * short queue flush time. Don't queue works which can run for too - * long. - * - * system_long_wq is similar to system_wq but may host long running - * works. Queue flushing might take relatively long. - * - * system_nrt_wq is non-reentrant and guarantees that any given work - * item is never executed in parallel by multiple CPUs. Queue - * flushing might take relatively long. - * - * system_unbound_wq is unbound workqueue. Workers are not bound to - * any specific CPU, not concurrency managed, and all queued works are - * executed immediately as long as max_active limit is not reached and - * resources are available. - * - * system_freezable_wq is equivalent to system_wq except that it's - * freezable. - * - * system_nrt_freezable_wq is equivalent to system_nrt_wq except that - * it's freezable. - */ -extern struct workqueue_struct *system_wq; -extern struct workqueue_struct *system_long_wq; -extern struct workqueue_struct *system_nrt_wq; -extern struct workqueue_struct *system_unbound_wq; -extern struct workqueue_struct *system_freezable_wq; -extern struct workqueue_struct *system_nrt_freezable_wq; - -extern struct workqueue_struct * -__alloc_workqueue_key(const char *fmt, unsigned int flags, int max_active, - struct lock_class_key *key, const char *lock_name, ...) __printf(1, 6); - -/** - * alloc_workqueue - allocate a workqueue - * @fmt: printf format for the name of the workqueue - * @flags: WQ_* flags - * @max_active: max in-flight work items, 0 for default - * @args: args for @fmt - * - * Allocate a workqueue with the specified parameters. For detailed - * information on WQ_* flags, please refer to Documentation/workqueue.txt. - * - * The __lock_name macro dance is to guarantee that single lock_class_key - * doesn't end up with different namesm, which isn't allowed by lockdep. - * - * RETURNS: - * Pointer to the allocated workqueue on success, %NULL on failure. - */ -#ifdef CONFIG_LOCKDEP -#define alloc_workqueue(fmt, flags, max_active, args...) \ -({ \ - static struct lock_class_key __key; \ - const char *__lock_name; \ - \ - if (__builtin_constant_p(fmt)) \ - __lock_name = (fmt); \ - else \ - __lock_name = #fmt; \ - \ - __alloc_workqueue_key((fmt), (flags), (max_active), \ - &__key, __lock_name, ##args); \ -}) -#else -#define alloc_workqueue(fmt, flags, max_active, args...) \ - __alloc_workqueue_key((fmt), (flags), (max_active), \ - NULL, NULL, ##args) -#endif - -/** - * alloc_ordered_workqueue - allocate an ordered workqueue - * @fmt: printf format for the name of the workqueue - * @flags: WQ_* flags (only WQ_FREEZABLE and WQ_MEM_RECLAIM are meaningful) - * @args: args for @fmt - * - * Allocate an ordered workqueue. An ordered workqueue executes at - * most one work item at any given time in the queued order. They are - * implemented as unbound workqueues with @max_active of one. - * - * RETURNS: - * Pointer to the allocated workqueue on success, %NULL on failure. - */ -#define alloc_ordered_workqueue(fmt, flags, args...) \ - alloc_workqueue(fmt, WQ_UNBOUND | (flags), 1, ##args) - -#define create_workqueue(name) \ - alloc_workqueue((name), WQ_MEM_RECLAIM, 1) -#define create_freezable_workqueue(name) \ - alloc_workqueue((name), WQ_FREEZABLE | WQ_UNBOUND | WQ_MEM_RECLAIM, 1) -#define create_singlethread_workqueue(name) \ - alloc_workqueue((name), WQ_UNBOUND | WQ_MEM_RECLAIM, 1) - -extern void destroy_workqueue(struct workqueue_struct *wq); - -extern int queue_work(struct workqueue_struct *wq, struct work_struct *work); -extern int queue_work_on(int cpu, struct workqueue_struct *wq, - struct work_struct *work); -extern int queue_delayed_work(struct workqueue_struct *wq, - struct delayed_work *work, unsigned long delay); -extern int queue_delayed_work_on(int cpu, struct workqueue_struct *wq, - struct delayed_work *work, unsigned long delay); - -extern void flush_workqueue(struct workqueue_struct *wq); -extern void drain_workqueue(struct workqueue_struct *wq); -extern void flush_scheduled_work(void); - -extern int schedule_work(struct work_struct *work); -extern int schedule_work_on(int cpu, struct work_struct *work); -extern int schedule_delayed_work(struct delayed_work *work, unsigned long delay); -extern int schedule_delayed_work_on(int cpu, struct delayed_work *work, - unsigned long delay); -extern int schedule_on_each_cpu(work_func_t func); -extern int keventd_up(void); - -int execute_in_process_context(work_func_t fn, struct execute_work *); - -extern bool flush_work(struct work_struct *work); -extern bool flush_work_sync(struct work_struct *work); -extern bool cancel_work_sync(struct work_struct *work); - -extern bool flush_delayed_work(struct delayed_work *dwork); -extern bool flush_delayed_work_sync(struct delayed_work *work); -extern bool cancel_delayed_work_sync(struct delayed_work *dwork); - -extern void workqueue_set_max_active(struct workqueue_struct *wq, - int max_active); -extern bool workqueue_congested(unsigned int cpu, struct workqueue_struct *wq); -extern unsigned int work_cpu(struct work_struct *work); -extern unsigned int work_busy(struct work_struct *work); - -/* - * Kill off a pending schedule_delayed_work(). Note that the work callback - * function may still be running on return from cancel_delayed_work(), unless - * it returns 1 and the work doesn't re-arm itself. Run flush_workqueue() or - * cancel_work_sync() to wait on it. - */ -static inline bool cancel_delayed_work(struct delayed_work *work) -{ - bool ret; - - ret = del_timer_sync(&work->timer); - if (ret) - work_clear_pending(&work->work); - return ret; -} - -/* - * Like above, but uses del_timer() instead of del_timer_sync(). This means, - * if it returns 0 the timer function may be running and the queueing is in - * progress. - */ -static inline bool __cancel_delayed_work(struct delayed_work *work) -{ - bool ret; - - ret = del_timer(&work->timer); - if (ret) - work_clear_pending(&work->work); - return ret; -} - -#ifndef CONFIG_SMP -static inline long work_on_cpu(unsigned int cpu, long (*fn)(void *), void *arg) -{ - return fn(arg); -} -#else -long work_on_cpu(unsigned int cpu, long (*fn)(void *), void *arg); -#endif /* CONFIG_SMP */ - -#ifdef CONFIG_FREEZER -extern void freeze_workqueues_begin(void); -extern bool freeze_workqueues_busy(void); -extern void thaw_workqueues(void); -#endif /* CONFIG_FREEZER */ - -#endif |