include/linux/poll.h

1 /* SPDX-License-Identifier: GPL-2.0 */
13 #include <uapi/linux/poll.h>
27 #define WQUEUES_STACK_ALLOC	(MAX_STACK_ALLOC - FRONTEND_STACK_ALLOC)
35  * structures and helpers for f_op->poll implementations
50 	if (p && p->_qproc && wait_address)  in poll_wait()
51 		p->_qproc(filp, wait_address, p);  in poll_wait()
55  * Return true if it is guaranteed that poll will not wait. This is the case
56  * if the poll() of another file descriptor in the set got an event, so there
61 	return p == NULL || p->_qproc == NULL;  in poll_does_not_wait()
65  * Return the set of events that the application wants to poll for.
67  * to be started implicitly on poll(). You typically only want to do that
72 	return p ? p->_key : ~(__poll_t)0;  in poll_requested_events()
77 	pt->_qproc = qproc;  in init_poll_funcptr()
78 	pt->_key   = ~(__poll_t)0; /* all events enabled */  in init_poll_funcptr()
83 	return file->f_op->poll;  in file_can_poll()
88 	if (unlikely(!file->f_op->poll))  in vfs_poll()
90 	return file->f_op->poll(file, pt);  in vfs_poll()
101  * Structures and helpers for select/poll syscall
117 #define MAX_INT64_SECONDS (((s64)(~((u64)0)>>1)/HZ)-1)
131 #define M(X) __MAP(v, (__force __u16)EPOLL##X, POLL##X)  in mangle_poll()
140 #define M(X) (__force __poll_t)__MAP(val, POLL##X, (__force __u16)EPOLL##X)  in demangle_poll()