poll.h File Reference

#include <linux/compiler.h>
#include <linux/ktime.h>
#include <linux/wait.h>
#include <linux/string.h>
#include <linux/fs.h>
#include <linux/sysctl.h>
#include <asm/uaccess.h>
#include <uapi/linux/poll.h>

Go to the source code of this file.

Data Structures
struct	poll_table_struct
struct	poll_table_entry
struct	poll_wqueues
struct	fd_set_bits

Macros
#define	MAX_STACK_ALLOC   832
#define	FRONTEND_STACK_ALLOC   256
#define	SELECT_STACK_ALLOC   FRONTEND_STACK_ALLOC
#define	POLL_STACK_ALLOC   FRONTEND_STACK_ALLOC
#define	WQUEUES_STACK_ALLOC   (MAX_STACK_ALLOC - FRONTEND_STACK_ALLOC)
#define	N_INLINE_POLL_ENTRIES   (WQUEUES_STACK_ALLOC / sizeof(struct poll_table_entry))
#define	DEFAULT_POLLMASK   (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM)
#define	FDS_BITPERLONG   (8*sizeof(long))
#define	FDS_LONGS(nr)   (((nr)+FDS_BITPERLONG-1)/FDS_BITPERLONG)
#define	FDS_BYTES(nr)   (FDS_LONGS(nr)*sizeof(long))
#define	MAX_INT64_SECONDS   (((s64)(~((u64)0)>>1)/HZ)-1)

Typedefs
typedef void(*	poll_queue_proc )(struct file *, wait_queue_head_t *, struct poll_table_struct *)
typedef struct poll_table_struct	poll_table

Functions
void	poll_initwait (struct poll_wqueues *pwq)
void	poll_freewait (struct poll_wqueues *pwq)
int	poll_schedule_timeout (struct poll_wqueues *pwq, int state, ktime_t *expires, unsigned long slack)
long	select_estimate_accuracy (struct timespec *tv)
int	do_select (int n, fd_set_bits *fds, struct timespec *end_time)
int	do_sys_poll (struct pollfd __user *ufds, unsigned int nfds, struct timespec *end_time)
int	core_sys_select (int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp, struct timespec *end_time)
int	poll_select_set_timeout (struct timespec *to, long sec, long nsec)

Variables
struct ctl_table	epoll_table []

Macro Definition Documentation

#define DEFAULT_POLLMASK   (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM)

Definition at line 24 of file poll.h.

#define FDS_BITPERLONG   (8*sizeof(long))

Definition at line 119 of file poll.h.

#define FDS_BYTES

(

nr

)

(FDS_LONGS(nr)*sizeof(long))

Definition at line 121 of file poll.h.

#define FDS_LONGS

(

nr

)

(((nr)+FDS_BITPERLONG-1)/FDS_BITPERLONG)

Definition at line 120 of file poll.h.

#define FRONTEND_STACK_ALLOC   256

Definition at line 18 of file poll.h.

#define MAX_INT64_SECONDS   (((s64)(~((u64)0)>>1)/HZ)-1)

Definition at line 154 of file poll.h.

#define MAX_STACK_ALLOC   832

Definition at line 17 of file poll.h.

#define N_INLINE_POLL_ENTRIES   (WQUEUES_STACK_ALLOC / sizeof(struct poll_table_entry))

Definition at line 22 of file poll.h.

#define POLL_STACK_ALLOC   FRONTEND_STACK_ALLOC

Definition at line 20 of file poll.h.

#define SELECT_STACK_ALLOC   FRONTEND_STACK_ALLOC

Definition at line 19 of file poll.h.

#define WQUEUES_STACK_ALLOC   (MAX_STACK_ALLOC - FRONTEND_STACK_ALLOC)

Definition at line 21 of file poll.h.

Typedef Documentation

typedef void(* poll_queue_proc)(struct file *, wait_queue_head_t *, struct poll_table_struct *)

Definition at line 31 of file poll.h.

typedef struct poll_table_struct poll_table

Function Documentation

int core_sys_select	(	int	n,
		fd_set __user *	inp,
		fd_set __user *	outp,
		fd_set __user *	exp,
		struct timespec *	end_time
	)

Definition at line 516 of file select.c.

int do_select	(	int	n,
		fd_set_bits *	fds,
		struct timespec *	end_time
	)

Definition at line 395 of file select.c.

int do_sys_poll	(	struct pollfd __user *	ufds,
		unsigned int	nfds,
		struct timespec *	end_time
	)

Definition at line 816 of file select.c.

void poll_freewait

(

struct poll_wqueues *

pwq

)

Definition at line 133 of file select.c.

void poll_initwait

(

struct poll_wqueues *

pwq

)

Definition at line 116 of file select.c.

int poll_schedule_timeout	(	struct poll_wqueues *	pwq,
		int	state,
		ktime_t *	expires,
		unsigned long	slack
	)

Definition at line 231 of file select.c.

int poll_select_set_timeout	(	struct timespec *	to,
		long	sec,
		long	nsec
	)

poll_select_set_timeout - helper function to setup the timeout value : pointer to timespec variable for the final timeout : seconds (from user space) : nanoseconds (from user space)

Note, we do not use a timespec for the user space value here, That way we can use the function for timeval and compat interfaces as well.

Returns -EINVAL if sec/nsec are not normalized. Otherwise 0.

Definition at line 269 of file select.c.

long select_estimate_accuracy

(

struct timespec *

tv

)

Definition at line 70 of file select.c.

Variable Documentation

struct ctl_table epoll_table[]