diff options
Diffstat (limited to 'ANDROID_3.4.5/include/linux/poll.h')
| -rw-r--r-- | ANDROID_3.4.5/include/linux/poll.h | 168 |
1 files changed, 0 insertions, 168 deletions
diff --git a/ANDROID_3.4.5/include/linux/poll.h b/ANDROID_3.4.5/include/linux/poll.h deleted file mode 100644 index 48fe8bc3..00000000 --- a/ANDROID_3.4.5/include/linux/poll.h +++ /dev/null @@ -1,168 +0,0 @@ -#ifndef _LINUX_POLL_H -#define _LINUX_POLL_H - -#include <asm/poll.h> - -#ifdef __KERNEL__ - -#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> - -extern struct ctl_table epoll_table[]; /* for sysctl */ -/* ~832 bytes of stack space used max in sys_select/sys_poll before allocating - additional memory. */ -#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) - -struct poll_table_struct; - -/* - * structures and helpers for f_op->poll implementations - */ -typedef void (*poll_queue_proc)(struct file *, wait_queue_head_t *, struct poll_table_struct *); - -/* - * Do not touch the structure directly, use the access functions - * poll_does_not_wait() and poll_requested_events() instead. - */ -typedef struct poll_table_struct { - poll_queue_proc _qproc; - unsigned long _key; -} poll_table; - -static inline void poll_wait(struct file * filp, wait_queue_head_t * wait_address, poll_table *p) -{ - if (p && p->_qproc && wait_address) - p->_qproc(filp, wait_address, p); -} - -/* - * Return true if it is guaranteed that poll will not wait. This is the case - * if the poll() of another file descriptor in the set got an event, so there - * is no need for waiting. - */ -static inline bool poll_does_not_wait(const poll_table *p) -{ - return p == NULL || p->_qproc == NULL; -} - -/* - * Return the set of events that the application wants to poll for. - * This is useful for drivers that need to know whether a DMA transfer has - * to be started implicitly on poll(). You typically only want to do that - * if the application is actually polling for POLLIN and/or POLLOUT. - */ -static inline unsigned long poll_requested_events(const poll_table *p) -{ - return p ? p->_key : ~0UL; -} - -static inline void init_poll_funcptr(poll_table *pt, poll_queue_proc qproc) -{ - pt->_qproc = qproc; - pt->_key = ~0UL; /* all events enabled */ -} - -struct poll_table_entry { - struct file *filp; - unsigned long key; - wait_queue_t wait; - wait_queue_head_t *wait_address; -}; - -/* - * Structures and helpers for select/poll syscall - */ -struct poll_wqueues { - poll_table pt; - struct poll_table_page *table; - struct task_struct *polling_task; - int triggered; - int error; - int inline_index; - struct poll_table_entry inline_entries[N_INLINE_POLL_ENTRIES]; -}; - -extern void poll_initwait(struct poll_wqueues *pwq); -extern void poll_freewait(struct poll_wqueues *pwq); -extern int poll_schedule_timeout(struct poll_wqueues *pwq, int state, - ktime_t *expires, unsigned long slack); -extern long select_estimate_accuracy(struct timespec *tv); - - -static inline int poll_schedule(struct poll_wqueues *pwq, int state) -{ - return poll_schedule_timeout(pwq, state, NULL, 0); -} - -/* - * Scalable version of the fd_set. - */ - -typedef struct { - unsigned long *in, *out, *ex; - unsigned long *res_in, *res_out, *res_ex; -} fd_set_bits; - -/* - * How many longwords for "nr" bits? - */ -#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)) - -/* - * We do a VERIFY_WRITE here even though we are only reading this time: - * we'll write to it eventually.. - * - * Use "unsigned long" accesses to let user-mode fd_set's be long-aligned. - */ -static inline -int get_fd_set(unsigned long nr, void __user *ufdset, unsigned long *fdset) -{ - nr = FDS_BYTES(nr); - if (ufdset) - return copy_from_user(fdset, ufdset, nr) ? -EFAULT : 0; - - memset(fdset, 0, nr); - return 0; -} - -static inline unsigned long __must_check -set_fd_set(unsigned long nr, void __user *ufdset, unsigned long *fdset) -{ - if (ufdset) - return __copy_to_user(ufdset, fdset, FDS_BYTES(nr)); - return 0; -} - -static inline -void zero_fd_set(unsigned long nr, unsigned long *fdset) -{ - memset(fdset, 0, FDS_BYTES(nr)); -} - -#define MAX_INT64_SECONDS (((s64)(~((u64)0)>>1)/HZ)-1) - -extern int do_select(int n, fd_set_bits *fds, struct timespec *end_time); -extern int do_sys_poll(struct pollfd __user * ufds, unsigned int nfds, - struct timespec *end_time); -extern int core_sys_select(int n, fd_set __user *inp, fd_set __user *outp, - fd_set __user *exp, struct timespec *end_time); - -extern int poll_select_set_timeout(struct timespec *to, long sec, long nsec); - -#endif /* KERNEL */ - -#endif /* _LINUX_POLL_H */ |