myvtm/libtoolkit/unix/core.c

#include "core.h"
#include <errno.h>
#include <fcntl.h>  /* O_CLOEXEC */
#include <sys/ioctl.h>
#include <sys/syscall.h>
#include <sys/eventfd.h>

int make_fd_cloexec(int fd, int set)
{
	int flags;
	int r;
	do {
		r = fcntl(fd, F_GETFD);
	}while (r == -1 && errno == EINTR);
	if (r == -1)
		return -1;

	/* Bail out now if already set/clear. */
	if (!!(r & FD_CLOEXEC) == !!set)
		return 0;

	if (set)
		flags = r | FD_CLOEXEC;
	else
		flags = r & ~FD_CLOEXEC;

	do {
		r = fcntl(fd, F_SETFD, flags);
	}while (r == -1 && errno == EINTR);

	if (r == -1)
		return -1;

	return 0;
}

int make_fd_nonblock(int fd, int set)
{
	int r;

	do {
		r = ioctl(fd, FIONBIO, &set);
	}while (r == -1 && errno == EINTR);

	if (r)
		return -1;

	return 0;
}


int async_fd_create()
{
	int fd;

	fd = eventfd(0, EFD_CLOEXEC | EFD_NONBLOCK);
	if (fd == -1) {
		return -1;
	}
	return fd;
}

void async_fd_close(int fd)
{
	close(fd);
}