Es++ Class: TimerDescriptor
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Source code
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* TimerDescriptor.h
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//2015/06/01 Modified to use Callback class.
#pragma once
#include <es++/Object.h>
#include <es++/FileDescriptor.h>
#include <es++/UnsignedInteger64.h>
#include <es++/ITimerSpec.h>
#include <es++/Callback.h>
#include <es++/Exception.h>
#include <sys/timerfd.h>
#include <sys/time.h>
namespace Es {
//Elapsed callback
typedef void (Object::*Elapsed)(uint64_t value);
class TimerDescriptor :public FileDescriptor {
private:
//Callback which can be called from read method.
Callback<Object*, Elapsed, uint64_t> callback;
public:
TimerDescriptor(int clockid, int flags)
:FileDescriptor()
{
int fd = timerfd_create(clockid, flags);
if (fd == INVALID_FD) {
throw Es::IException("Failed timerfd_create :%s", ERROR_STRING);
}
setFD(fd);
}
int setTime(int flags, ITimerSpec& new_value)
{
struct itimerspec its = new_value.get();
return timerfd_settime(getFD(), flags, &its, NULL);
}
int setTime(int flags, const struct itimerspec& new_value)
{
return timerfd_settime(getFD(), flags, &new_value, NULL);
}
int setTime(int flags, const struct itimerspec& new_value,
struct itimerspec& curr_value)
{
return timerfd_settime(getFD(), flags, &new_value, &curr_value);
}
int getTime(struct itimerspec& curr_value)
{
return timerfd_gettime(getFD(), &curr_value);
}
void setCallback(Object* object, Elapsed elapsed)
{
callback.set(object, elapsed);
}
void callCallback(uint64_t& value)
{
callback.call(value);
}
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);
}
return size;
}
};
}
Last modified: 27 July 2017
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