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Eventfd.cpp
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68 lines (59 loc) · 1.51 KB
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#include "net/Eventfd.h"
#include <sys/eventfd.h>
#include <unistd.h>
#include "base/Logger.h"
#include "net/SocketUtil.h"
NAMESPACE_ZL_NET_START
EventfdHandler::EventfdHandler(unsigned int initval/* = 0 */, int flags/* = EFD_NONBLOCK | EFD_CLOEXEC */)
{
eventfd_ = -1;
createEventfd(initval, flags);
}
EventfdHandler::~EventfdHandler()
{
if(eventfd_ != -1)
{
::close(eventfd_);
eventfd_ = -1;
}
}
int EventfdHandler::createEventfd(unsigned int initval, int flags)
{
int efd = ::eventfd(initval, flags);
if (efd < 0)
{
LOG_ALERT("create eventfd failed in EventfdHandler::createEventfd()");
return efd;
}
LOG_INFO("EventfdHandler::createEventfd [%d]", efd);
eventfd_ = efd;
return efd;
}
ssize_t EventfdHandler::write(uint64_t value/* = 1 */)
{
ssize_t n = ::write(eventfd_, &value, sizeof(value));
if (n != sizeof(value)) // just write one uint64_t
{
LOG_ERROR("EventfdHandler::write(): write error[%d][%d][%d]", eventfd_, n, errno);
}
return n;
}
ssize_t EventfdHandler::read(uint64_t *value/* = NULL*/)
{
ssize_t n;
if (value == NULL)
{
uint64_t tmp;
n = ::read(eventfd_, &tmp, sizeof(uint64_t));
}
else
{
n = ::read(eventfd_, value, sizeof(uint64_t));
}
if (n != sizeof(value)) //always return 8 byte
{
LOG_ERROR("EventfdHandler::read(): read error[%d][%d][%d][%s]", eventfd_, n, errno, strerror(errno));
}
return n;
}
NAMESPACE_ZL_NET_END