309 lines
7.9 KiB
C
309 lines
7.9 KiB
C
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/*****************************************************************************
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$Id$
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File: em.h
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Date: 06Apr06
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Copyright (C) 2006-07 by Francis Cianfrocca. All Rights Reserved.
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Gmail: blackhedd
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This program is free software; you can redistribute it and/or modify
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it under the terms of either: 1) the GNU General Public License
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as published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version; or 2) Ruby's License.
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See the file COPYING for complete licensing information.
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*****************************************************************************/
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#ifndef __EventMachine__H_
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#define __EventMachine__H_
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#ifdef BUILD_FOR_RUBY
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#include <ruby.h>
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#ifdef HAVE_RB_THREAD_FD_SELECT
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#define EmSelect rb_thread_fd_select
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#else
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// ruby 1.9.1 and below
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#define EmSelect rb_thread_select
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#endif
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#ifdef HAVE_RB_THREAD_CALL_WITHOUT_GVL
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#include <ruby/thread.h>
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#endif
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#ifdef HAVE_RB_WAIT_FOR_SINGLE_FD
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#include <ruby/io.h>
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#endif
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#if defined(HAVE_RB_TRAP_IMMEDIATE)
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#include <rubysig.h>
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#elif defined(HAVE_RB_ENABLE_INTERRUPT)
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extern "C" {
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void rb_enable_interrupt(void);
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void rb_disable_interrupt(void);
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}
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#define TRAP_BEG rb_enable_interrupt()
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#define TRAP_END do { rb_disable_interrupt(); rb_thread_check_ints(); } while(0)
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#else
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#define TRAP_BEG
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#define TRAP_END
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#endif
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// 1.9.0 compat
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#ifndef RUBY_UBF_IO
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#define RUBY_UBF_IO RB_UBF_DFL
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#endif
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#ifndef RSTRING_PTR
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#define RSTRING_PTR(str) RSTRING(str)->ptr
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#endif
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#ifndef RSTRING_LEN
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#define RSTRING_LEN(str) RSTRING(str)->len
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#endif
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#ifndef RSTRING_LENINT
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#define RSTRING_LENINT(str) RSTRING_LEN(str)
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#endif
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#else
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#define EmSelect select
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#endif
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#if !defined(HAVE_TYPE_RB_FDSET_T)
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#define fd_check(n) (((n) < FD_SETSIZE) ? 1 : 0*fprintf(stderr, "fd %d too large for select\n", (n)))
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// These definitions are cribbed from include/ruby/intern.h in Ruby 1.9.3,
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// with this change: any macros that read or write the nth element of an
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// fdset first call fd_check to make sure n is in bounds.
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typedef fd_set rb_fdset_t;
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#define rb_fd_zero(f) FD_ZERO(f)
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#define rb_fd_set(n, f) do { if (fd_check(n)) FD_SET((n), (f)); } while(0)
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#define rb_fd_clr(n, f) do { if (fd_check(n)) FD_CLR((n), (f)); } while(0)
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#define rb_fd_isset(n, f) (fd_check(n) ? FD_ISSET((n), (f)) : 0)
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#define rb_fd_copy(d, s, n) (*(d) = *(s))
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#define rb_fd_dup(d, s) (*(d) = *(s))
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#define rb_fd_resize(n, f) ((void)(f))
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#define rb_fd_ptr(f) (f)
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#define rb_fd_init(f) FD_ZERO(f)
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#define rb_fd_init_copy(d, s) (*(d) = *(s))
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#define rb_fd_term(f) ((void)(f))
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#define rb_fd_max(f) FD_SETSIZE
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#define rb_fd_select(n, rfds, wfds, efds, timeout) \
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select(fd_check((n)-1) ? (n) : FD_SETSIZE, (rfds), (wfds), (efds), (timeout))
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#define rb_thread_fd_select(n, rfds, wfds, efds, timeout) \
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rb_thread_select(fd_check((n)-1) ? (n) : FD_SETSIZE, (rfds), (wfds), (efds), (timeout))
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#endif
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// This Solaris fix is adapted from eval_intern.h in Ruby 1.9.3:
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// Solaris sys/select.h switches select to select_large_fdset to support larger
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// file descriptors if FD_SETSIZE is larger than 1024 on 32bit environment.
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// But Ruby doesn't change FD_SETSIZE because fd_set is allocated dynamically.
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// So following definition is required to use select_large_fdset.
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#ifdef HAVE_SELECT_LARGE_FDSET
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#define select(n, r, w, e, t) select_large_fdset((n), (r), (w), (e), (t))
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extern "C" {
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int select_large_fdset(int, fd_set *, fd_set *, fd_set *, struct timeval *);
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}
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#endif
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class EventableDescriptor;
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class InotifyDescriptor;
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struct SelectData_t;
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/*************
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enum Poller_t
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*************/
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enum Poller_t {
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Poller_Default, // typically Select
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Poller_Epoll,
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Poller_Kqueue
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};
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/********************
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class EventMachine_t
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********************/
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class EventMachine_t
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{
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public:
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static int GetMaxTimerCount();
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static void SetMaxTimerCount (int);
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static int GetSimultaneousAcceptCount();
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static void SetSimultaneousAcceptCount (int);
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public:
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EventMachine_t (EMCallback, Poller_t);
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virtual ~EventMachine_t();
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bool RunOnce();
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void Run();
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void ScheduleHalt();
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bool Stopping();
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void SignalLoopBreaker();
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const uintptr_t InstallOneshotTimer (uint64_t);
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const uintptr_t ConnectToServer (const char *, int, const char *, int);
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const uintptr_t ConnectToUnixServer (const char *);
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const uintptr_t CreateTcpServer (const char *, int);
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const uintptr_t OpenDatagramSocket (const char *, int);
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const uintptr_t CreateUnixDomainServer (const char*);
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const uintptr_t AttachSD (SOCKET);
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const uintptr_t OpenKeyboard();
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//const char *Popen (const char*, const char*);
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const uintptr_t Socketpair (char* const*);
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void Add (EventableDescriptor*);
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void Modify (EventableDescriptor*);
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void Deregister (EventableDescriptor*);
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const uintptr_t AttachFD (SOCKET, bool);
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int DetachFD (EventableDescriptor*);
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void ArmKqueueWriter (EventableDescriptor*);
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void ArmKqueueReader (EventableDescriptor*);
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void SetTimerQuantum (int);
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static void SetuidString (const char*);
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static int SetRlimitNofile (int);
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pid_t SubprocessPid;
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int SubprocessExitStatus;
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int GetConnectionCount();
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float GetHeartbeatInterval();
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int SetHeartbeatInterval(float);
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const uintptr_t WatchFile (const char*);
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void UnwatchFile (int);
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void UnwatchFile (const uintptr_t);
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#ifdef HAVE_KQUEUE
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void _HandleKqueueFileEvent (struct kevent*);
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void _RegisterKqueueFileEvent(int);
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#endif
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const uintptr_t WatchPid (int);
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void UnwatchPid (int);
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void UnwatchPid (const uintptr_t);
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#ifdef HAVE_KQUEUE
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void _HandleKqueuePidEvent (struct kevent*);
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#endif
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uint64_t GetCurrentLoopTime() { return MyCurrentLoopTime; }
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void QueueHeartbeat(EventableDescriptor*);
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void ClearHeartbeat(uint64_t, EventableDescriptor*);
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uint64_t GetRealTime();
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Poller_t GetPoller() { return Poller; }
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static int name2address (const char *server, int port, int socktype, struct sockaddr *addr, size_t *addr_len);
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private:
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void _RunTimers();
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void _UpdateTime();
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void _AddNewDescriptors();
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void _ModifyDescriptors();
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void _InitializeLoopBreaker();
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void _CleanupSockets();
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void _RunSelectOnce();
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void _RunEpollOnce();
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void _RunKqueueOnce();
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void _ModifyEpollEvent (EventableDescriptor*);
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void _DispatchHeartbeats();
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timeval _TimeTilNextEvent();
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void _CleanBadDescriptors();
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public:
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void _ReadLoopBreaker();
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void _ReadInotifyEvents();
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int NumCloseScheduled;
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private:
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enum {
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MaxEpollDescriptors = 64*1024,
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MaxEvents = 4096
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};
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int HeartbeatInterval;
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EMCallback EventCallback;
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class Timer_t: public Bindable_t {
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};
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std::multimap<uint64_t, Timer_t> Timers;
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std::multimap<uint64_t, EventableDescriptor*> Heartbeats;
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std::map<int, Bindable_t*> Files;
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std::map<int, Bindable_t*> Pids;
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std::vector<EventableDescriptor*> Descriptors;
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std::vector<EventableDescriptor*> NewDescriptors;
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std::set<EventableDescriptor*> ModifiedDescriptors;
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SOCKET LoopBreakerReader;
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SOCKET LoopBreakerWriter;
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#ifdef OS_WIN32
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struct sockaddr_in LoopBreakerTarget;
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#endif
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timeval Quantum;
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uint64_t MyCurrentLoopTime;
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#ifdef OS_WIN32
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unsigned TickCountTickover;
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unsigned LastTickCount;
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#endif
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#ifdef OS_DARWIN
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mach_timebase_info_data_t mach_timebase;
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#endif
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private:
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bool bTerminateSignalReceived;
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SelectData_t *SelectData;
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Poller_t Poller;
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int epfd; // Epoll file-descriptor
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#ifdef HAVE_EPOLL
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struct epoll_event epoll_events [MaxEvents];
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#endif
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int kqfd; // Kqueue file-descriptor
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#ifdef HAVE_KQUEUE
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struct kevent Karray [MaxEvents];
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#endif
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#ifdef HAVE_INOTIFY
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InotifyDescriptor *inotify; // pollable descriptor for our inotify instance
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#endif
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};
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/*******************
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struct SelectData_t
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*******************/
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struct SelectData_t
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{
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SelectData_t();
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~SelectData_t();
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int _Select();
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void _Clear();
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SOCKET maxsocket;
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rb_fdset_t fdreads;
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rb_fdset_t fdwrites;
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rb_fdset_t fderrors;
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timeval tv;
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int nSockets;
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};
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#endif // __EventMachine__H_
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