tools/include/nolibc/poll.h

Source file repositories/reference/linux-study-clean/tools/include/nolibc/poll.h

File Facts

System
Linux kernel
Corpus path
tools/include/nolibc/poll.h
Extension
.h
Size
1140 bytes
Lines
52
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

#include "nolibc.h"

#ifndef _NOLIBC_POLL_H
#define _NOLIBC_POLL_H

#include "arch.h"
#include "sys.h"

#include <linux/poll.h>
#include <linux/time.h>

/*
 * int poll(struct pollfd *fds, int nfds, int timeout);
 */

static __attribute__((unused))
int _sys_poll(struct pollfd *fds, int nfds, int timeout)
{
#if defined(__NR_ppoll_time64)
	struct __kernel_timespec t;

	if (timeout >= 0) {
		t.tv_sec  = timeout / 1000;
		t.tv_nsec = (timeout % 1000) * 1000000;
	}
	return __nolibc_syscall5(__NR_ppoll_time64, fds, nfds, (timeout >= 0) ? &t : NULL, NULL, 0);
#else
	struct __kernel_old_timespec t;

	if (timeout >= 0) {
		t.tv_sec  = timeout / 1000;
		t.tv_nsec = (timeout % 1000) * 1000000;
	}
	return __nolibc_syscall5(__NR_ppoll, fds, nfds, (timeout >= 0) ? &t : NULL, NULL, 0);
#endif
}

static __attribute__((unused))
int poll(struct pollfd *fds, int nfds, int timeout)
{
	return __sysret(_sys_poll(fds, nfds, timeout));
}

#endif /* _NOLIBC_POLL_H */

Annotation

Implementation Notes