mirror of
https://github.com/stefanocasazza/ULib.git
synced 2025-10-05 19:18:01 +08:00
106 lines
2.4 KiB
C++
106 lines
2.4 KiB
C++
// ============================================================================
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//
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// = LIBRARY
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// ULib - c++ library
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//
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// = FILENAME
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// event_fd.h
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//
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// = AUTHOR
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// Stefano Casazza
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//
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// ============================================================================
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#ifndef ULIB_EVENT_FD_H
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#define ULIB_EVENT_FD_H 1
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#include <ulib/internal/common.h>
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#ifdef USE_LIBEVENT
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# include <ulib/libevent/event.h>
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#endif
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#ifndef EPOLLIN
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#define EPOLLIN 0x0001
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#endif
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#ifndef EPOLLOUT
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#define EPOLLOUT 0x0004
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#endif
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#ifndef EPOLLRDHUP
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#define EPOLLRDHUP 0x2000
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#endif
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// -------------------------------------------------------------------------------------------------------------------------
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// EPOLLET is edge-triggered (alas SIGIO, when that descriptor transitions from not ready to ready, the kernel notifies you)
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// -------------------------------------------------------------------------------------------------------------------------
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#ifndef EPOLLET
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#define EPOLLET (1 << 31)
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#endif
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#define U_NOTIFIER_OK 0
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#define U_NOTIFIER_DELETE -1
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/**
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* Valid opcodes ( "op" parameter ) to issue to epoll_ctl()
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*
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* #define EPOLL_CTL_ADD 1 // Add a file descriptor to the interface
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* #define EPOLL_CTL_DEL 2 // Remove a file descriptor from the interface
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* #define EPOLL_CTL_MOD 3 // Change a file descriptor in epoll_event structure
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*/
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class U_EXPORT UEventFd {
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public:
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int fd;
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uint32_t op_mask; // [ EPOLLIN | EPOLLOUT ]
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UEventFd()
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{
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fd = -1;
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op_mask = EPOLLIN | EPOLLRDHUP;
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# ifdef USE_LIBEVENT
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pevent = 0;
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# endif
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}
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virtual ~UEventFd() __pure
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{
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# ifdef USE_LIBEVENT
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if (pevent)
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{
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UDispatcher::del(pevent);
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delete pevent;
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}
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# endif
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}
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// method VIRTUAL to define
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virtual int handlerRead() { return U_NOTIFIER_DELETE; }
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virtual int handlerWrite() { return U_NOTIFIER_DELETE; }
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virtual int handlerTimeout() { return U_NOTIFIER_DELETE; }
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virtual void handlerDelete() { delete this; }
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#ifdef USE_LIBEVENT
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UEvent<UEventFd>* pevent;
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void operator()(int fd, short event);
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#endif
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#if defined(U_STDCPP_ENABLE) && defined(DEBUG)
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const char* dump(bool) const { return ""; }
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#endif
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private:
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#ifdef U_COMPILER_DELETE_MEMBERS
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UEventFd(const UEventFd&) = delete;
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UEventFd& operator=(const UEventFd&) = delete;
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#else
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UEventFd(const UEventFd&) {}
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UEventFd& operator=(const UEventFd&) { return *this; }
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#endif
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};
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#endif
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