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Diffstat (limited to 'libdde_linux26/contrib/include/linux/workqueue.h')
| -rw-r--r-- | libdde_linux26/contrib/include/linux/workqueue.h | 263 |
1 files changed, 263 insertions, 0 deletions
diff --git a/libdde_linux26/contrib/include/linux/workqueue.h b/libdde_linux26/contrib/include/linux/workqueue.h new file mode 100644 index 00000000..3cd51e57 --- /dev/null +++ b/libdde_linux26/contrib/include/linux/workqueue.h @@ -0,0 +1,263 @@ +/* + * 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 <asm/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)) + +struct work_struct { + atomic_long_t data; +#define WORK_STRUCT_PENDING 0 /* T if work item pending execution */ +#define WORK_STRUCT_FLAG_MASK (3UL) +#define WORK_STRUCT_WQ_DATA_MASK (~WORK_STRUCT_FLAG_MASK) + struct list_head entry; + work_func_t func; +#ifdef CONFIG_LOCKDEP + struct lockdep_map lockdep_map; +#endif +}; + +#define WORK_DATA_INIT() ATOMIC_LONG_INIT(0) + +struct delayed_work { + struct work_struct work; + struct timer_list timer; +}; + +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_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 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) + +/* + * 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)) + +/* + * initialize all of a work item in one go + * + * NOTE! No point in using "atomic_long_set()": useing a direct + * assignment of the work data initializer allows the compiler + * to generate better code. + */ +#ifdef CONFIG_LOCKDEP +#define INIT_WORK(_work, _func) \ + do { \ + static struct lock_class_key __key; \ + \ + (_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) \ + do { \ + (_work)->data = (atomic_long_t) WORK_DATA_INIT(); \ + INIT_LIST_HEAD(&(_work)->entry); \ + PREPARE_WORK((_work), (_func)); \ + } while (0) +#endif + +#define INIT_DELAYED_WORK(_work, _func) \ + do { \ + INIT_WORK(&(_work)->work, (_func)); \ + init_timer(&(_work)->timer); \ + } while (0) + +#define INIT_DELAYED_WORK_ON_STACK(_work, _func) \ + do { \ + INIT_WORK(&(_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) + +#define INIT_DELAYED_WORK_ON_STACK(_work, _func) \ + do { \ + INIT_WORK(&(_work)->work, (_func)); \ + init_timer_on_stack(&(_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, 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, work_data_bits(work)) + + +extern struct workqueue_struct * +__create_workqueue_key(const char *name, int singlethread, + int freezeable, int rt, struct lock_class_key *key, + const char *lock_name); + +#ifdef CONFIG_LOCKDEP +#define __create_workqueue(name, singlethread, freezeable, rt) \ +({ \ + static struct lock_class_key __key; \ + const char *__lock_name; \ + \ + if (__builtin_constant_p(name)) \ + __lock_name = (name); \ + else \ + __lock_name = #name; \ + \ + __create_workqueue_key((name), (singlethread), \ + (freezeable), (rt), &__key, \ + __lock_name); \ +}) +#else +#define __create_workqueue(name, singlethread, freezeable, rt) \ + __create_workqueue_key((name), (singlethread), (freezeable), (rt), \ + NULL, NULL) +#endif + +#define create_workqueue(name) __create_workqueue((name), 0, 0, 0) +#define create_rt_workqueue(name) __create_workqueue((name), 0, 0, 1) +#define create_freezeable_workqueue(name) __create_workqueue((name), 1, 1, 0) +#define create_singlethread_workqueue(name) __create_workqueue((name), 1, 0, 0) + +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 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 current_is_keventd(void); +extern int keventd_up(void); + +extern void init_workqueues(void); +int execute_in_process_context(work_func_t fn, struct execute_work *); + +extern int flush_work(struct work_struct *work); + +extern int cancel_work_sync(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 int cancel_delayed_work(struct delayed_work *work) +{ + int ret; + + ret = del_timer_sync(&work->timer); + if (ret) + work_clear_pending(&work->work); + return ret; +} + +extern int cancel_delayed_work_sync(struct delayed_work *work); + +/* Obsolete. use cancel_delayed_work_sync() */ +static inline +void cancel_rearming_delayed_workqueue(struct workqueue_struct *wq, + struct delayed_work *work) +{ + cancel_delayed_work_sync(work); +} + +/* Obsolete. use cancel_delayed_work_sync() */ +static inline +void cancel_rearming_delayed_work(struct delayed_work *work) +{ + cancel_delayed_work_sync(work); +} + +#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 */ +#endif |