gwpoll.h
资源名称:gateway-1.2.1 [点击查看]
上传用户:gzpyjq
上传日期:2013-01-31
资源大小:1852k
文件大小:2k
源码类别:
手机WAP编程
开发平台:
WINDOWS
- /* gwpoll.h - define poll() for systems that don't have it */
- #ifndef GWPOLL_H
- #define GWPOLL_H
- /* If the system supplies it, we're done. Assume that if the header file
- * exists, it will define poll() and struct pollfd for us. */
- #ifdef HAVE_SYS_POLL_H
- #include <sys/poll.h>
- /* Most systems accept any negative timeout value as meaning infinite
- * timeout. FreeBSD explicitly wants INFTIM, however. Other systems
- * don't define INFTIM. So we use it if it's defined, and -1 otherwise.
- */
- #ifdef INFTIM
- #define POLL_NOTIMEOUT INFTIM
- #else
- #define POLL_NOTIMEOUT (-1)
- #endif
- #else
- /* Define struct pollfd and the event bits, and declare a function poll()
- * that uses them and is a wrapper around select(). */
- struct pollfd {
- int fd; /* file descriptor */
- short events; /* requested events */
- short revents; /* returned events */
- };
- /* Bits for events and revents */
- #define POLLIN 1 /* Reading will not block */
- #define POLLPRI 2 /* Urgent data available for reading */
- #define POLLOUT 4 /* Writing will not block */
- /* Bits only used in revents */
- #define POLLERR 8 /* Error condition */
- #define POLLHUP 16 /* Hung up: fd was closed by other side */
- #define POLLNVAL 32 /* Invalid: fd not open or not valid */
- #define POLL_NOTIMEOUT (-1)
- /* Implement the function as gw_poll, in case the system does have a poll()
- * function in its libraries but just fails to define it in sys/poll.h. */
- #define poll(fdarray, numfds, timeout) gw_poll(fdarray, numfds, timeout)
- int gw_poll(struct pollfd *fdarray, unsigned int numfds, int timeout);
- #endif /* !HAVE_SYS_POLL_H */
- #endif