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#ifndef _iowatch_h
#define _iowatch_h
/**
* A simple wrapper for select()
*
* IOWatch is a simple wrapper for the select
* system call. In particular, it takes care
* of passing the maximum file descriptor
* argument (arg 1) of select() correctly.
* IOWatch handles select on read descriptors only.
*/
class IOWatch {
public:
/**
* Creates a new instance.
*/
IOWatch();
/**
* Destroys an instance.
*/
~IOWatch();
/**
* Adds a file descriptor to
* the set of descriptors.
*
* @param fd The file descriptor to add.
*/
void addIO(const int fd);
/**
* Removes a file descriptor from the
* set of descriptors.
*
* @param fd The file descriptor to remove.
*/
void remIO(const int fd);
/**
* Performs a select() call.
*
* @param secs Number of seconds to wait.
* @param usecs Number of microseconds to wait.
*
* @return true, if any of the descriptors is
* readable.
*/
bool watch(const long secs, const long usecs);
private:
int num;
int *io;
};
#endif
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