Es++ Class: EventDescriptor
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Source code
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* EventDescriptor.h
*
*****************************************************************************/
//2015/06/01 Modified to use Callback class.
#pragma once
#include <es++/Object.h>
#include <es++/UnsignedInteger64.h>
#include <es++/FileDescriptor.h>
#include <es++/Exception.h>
#include <es++/Callback.h>
#include <sys/eventfd.h>
namespace Es {
typedef void (Object::*Notified)(uint64_t);
class EventDescriptor :public FileDescriptor {
private:
//Callback
Callback<Object*, Notified, uint64_t> callback;
public:
EventDescriptor(int fd)
:FileDescriptor()
{
if (fd == INVALID_FD) {
throw Es::IException("Failed eventfd :%s", ERROR_STRING); // strerror(errno));
}
setFD(fd);
}
public:
EventDescriptor(unsigned int initval, int flags)
:FileDescriptor()
{
int fd = eventfd(initval, flags);
if (fd == INVALID_FD) {
throw Es::IException("Failed eventfd :%s", ERROR_STRING); // strerror(errno));
}
setFD(fd);
}
void setCallback(Object* object, Notified notified)
{
callback.set(object, notified);
}
virtual void callCallback(uint64_t& value)
{
callback.call(value);
//UnsignedInteger64 u64(value);
//printf("EventDescriptor::handle %s\n", u64.toString() );
}
ssize_t read(uint64_t& value)
{
ssize_t size = FileDescriptor::read((void*)&value, sizeof(value));
if (size != sizeof(value)) {
throw Es::IException("Failed to read: %s", ERROR_STRING);
}
callCallback(value);
return size;
}
ssize_t write(uint64_t& value)
{
ssize_t size = FileDescriptor::write((void*)&value, sizeof(value));
if (size != sizeof(value)) {
throw Es::IException("Failed to write: %s", ERROR_STRING)
}
callCallback(value);
return size;
}
};
}
Last modified: 27 July 2017
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