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#ifndef NIO_H
#define NIO_H 1
#include <poll.h>
#define WARN_UNUSED __attribute__((__warn_unused_result__))
enum
{
NIO_SUCCESS = 0,
NIO_ERROR_INTERNAL = 1,
NIO_ERROR_SYSTEM = -1
};
enum
{
NIO_EVENT_INVALID = 0,
NIO_EVENT_INPUT = 1,
NIO_EVENT_OUTPUT = 2,
NIO_EVENT_ERROR = 4,
};
struct nio
{
int nready;
nfds_t poll_max_fds;
struct pollfd * poll_fds;
void ** poll_ptrs;
nfds_t * poll_fds_set;
int epoll_fd;
int max_events;
void * events;
};
void nio_init(struct nio * io);
WARN_UNUSED
int nio_use_poll(struct nio * io, nfds_t max_fds);
WARN_UNUSED
int nio_use_epoll(struct nio * io, int max_events);
WARN_UNUSED
int nio_add_fd(struct nio * io, int fd, int event_flags, void * ptr);
WARN_UNUSED
int nio_mod_fd(struct nio * io, int fd, int event_flags, void * ptr);
WARN_UNUSED
int nio_del_fd(struct nio * io, int fd);
WARN_UNUSED
int nio_run(struct nio * io, int timeout);
WARN_UNUSED
static inline int nio_get_nready(struct nio const * const io)
{
return io->nready;
}
WARN_UNUSED
int nio_check(struct nio * io, int index, int events);
WARN_UNUSED
int nio_is_valid(struct nio const * const io, int index);
WARN_UNUSED
int nio_get_fd(struct nio * io, int index);
WARN_UNUSED
void * nio_get_ptr(struct nio * io, int index);
WARN_UNUSED
static inline int nio_has_input(struct nio * io, int index)
{
return nio_check(io, index, NIO_EVENT_INPUT);
}
WARN_UNUSED
static inline int nio_can_output(struct nio * io, int index)
{
return nio_check(io, index, NIO_EVENT_OUTPUT);
}
WARN_UNUSED
static inline int nio_has_error(struct nio * io, int index)
{
return nio_check(io, index, NIO_EVENT_ERROR);
}
void nio_free(struct nio * io);
#endif
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