Kannel: Open Source WAP and SMS gateway  $Revision: 5037 $
gwpoll.h
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56 
57 /* gwpoll.h - define poll() for systems that don't have it */
58 
59 #ifndef GWPOLL_H
60 #define GWPOLL_H
61 
62 /* If the system supplies it, we're done. Assume that if the header file
63  * exists, it will define poll() and struct pollfd for us. */
64 #ifdef HAVE_SYS_POLL_H
65 
66 #include <sys/poll.h>
67 
68 /* Most systems accept any negative timeout value as meaning infinite
69  * timeout. FreeBSD explicitly wants INFTIM, however. Other systems
70  * don't define INFTIM. So we use it if it's defined, and -1 otherwise.
71  */
72 
73 #ifdef INFTIM
74 #define POLL_NOTIMEOUT INFTIM
75 #else
76 #define POLL_NOTIMEOUT (-1)
77 #endif
78 
79 #else
80 
81 /* Define struct pollfd and the event bits, and declare a function poll()
82  * that uses them and is a wrapper around select(). */
83 
84 struct pollfd {
85  int fd; /* file descriptor */
86  short events; /* requested events */
87  short revents; /* returned events */
88 };
89 
90 /* Bits for events and revents */
91 #define POLLIN 1 /* Reading will not block */
92 #define POLLPRI 2 /* Urgent data available for reading */
93 #define POLLOUT 4 /* Writing will not block */
94 
95 /* Bits only used in revents */
96 #define POLLERR 8 /* Error condition */
97 #define POLLHUP 16 /* Hung up: fd was closed by other side */
98 #define POLLNVAL 32 /* Invalid: fd not open or not valid */
99 
100 #define POLL_NOTIMEOUT (-1)
101 
102 /* Implement the function as gw_poll, in case the system does have a poll()
103  * function in its libraries but just fails to define it in sys/poll.h. */
104 #define poll(fdarray, numfds, timeout) gw_poll(fdarray, numfds, timeout)
105 int gw_poll(struct pollfd *fdarray, unsigned int numfds, int timeout);
106 
107 #endif /* !HAVE_SYS_POLL_H */
108 
109 #endif
int gw_poll(struct pollfd *fdarray, unsigned int numfds, int timeout)
Definition: gwpoll.c:67
short events
Definition: gwpoll.h:86
Definition: gwpoll.h:84
int fd
Definition: gwpoll.h:85
short revents
Definition: gwpoll.h:87
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