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#ifndef my_extern
#define my_extern extern
#endif
#include "io.h"
#include "array.h"
#include "iarray.h"
#ifdef __MINGW32__
#include "socket.h"
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my_extern HANDLE io_comport;
#else
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#include "haveepoll.h"
#include "havekqueue.h"
#include "havedevpoll.h"
#include "havesigio.h"
#ifdef HAVE_SIGIO
#define _GNU_SOURCE
#include <signal.h>
#endif
#endif
/* We simulate a level-triggered API on top of an event signalling
* mechanism that can be level-triggered (epoll/kqueue/poll) or
* edge-triggered (SIGIO).
* Difficulty: we want to avoid unnecessary syscalls, so we keep state
* internally. If the user says he does not want to read/write anymore,
* we don't tell the kernel straight away. The rationale is that the
* typical protocol consists of interleaved reading and writing, so
* after each read you'd call io_dontwantread, io_wantwrite, io_wait,
* io_dontwantwrite, io_wantread, and in the regular case there is no
* incoming data between io_dontwantread and io_wantread, so we might as
* well optimistically not do those syscalls and then handle the
* complexity if there is more incoming data. */
/* Basically, we tell the kernel that we want to read if !canread,
* and we tell the kernel that we want to write if !canwrite. */
typedef struct {
tai6464 timeout;
unsigned int wantread:1; /* does the app want to read/write? */
unsigned int wantwrite:1;
unsigned int canread:1; /* do we know we can read/write? */
unsigned int canwrite:1;
unsigned int nonblock:1; /* is this socket non-blocking? */
unsigned int inuse:1; /* internal consistency checking */
unsigned int kernelwantread:1; /* did we tell the kernel we want to read/write? */
unsigned int kernelwantwrite:1;
unsigned int epolladded:1;
unsigned int closed:1; /* io_close called, but close deferred because of outstanding events */
#ifdef __MINGW32__
unsigned int readqueued:2;
unsigned int writequeued:2;
unsigned int acceptqueued:2;
unsigned int connectqueued:2;
unsigned int sendfilequeued:2;
unsigned int listened:1;
#endif
long next_read;
long next_write;
void* cookie;
void* mmapped;
long maplen;
uint64 mapofs;
#ifdef __MINGW32__
OVERLAPPED or,ow,os; /* overlapped for read+accept, write+connect, sendfile */
HANDLE /* fd, */ mh;
char inbuf[8192];
int bytes_read,bytes_written;
DWORD errorcode;
SOCKET next_accept;
#endif
} io_entry;
extern int io_multithreaded;
extern int io_sockets[2];
my_extern iarray io_fds;
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my_extern uint64 io_wanted_fds;
my_extern array io_pollfds;
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my_extern long first_readable;
my_extern long first_writeable;
my_extern long first_deferred;
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my_extern enum __io_waitmode {
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UNDECIDED,
POLL
#ifdef HAVE_KQUEUE
,KQUEUE
#endif
#ifdef HAVE_EPOLL
,EPOLL
#endif
#ifdef HAVE_SIGIO
,_SIGIO
#endif
#ifdef HAVE_DEVPOLL
,DEVPOLL
#endif
#ifdef __MINGW32__
,COMPLETIONPORT
#endif
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} io_waitmode;
#if defined(HAVE_KQUEUE) || defined(HAVE_EPOLL) || defined(HAVE_DEVPOLL)
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my_extern int io_master;
#endif
#if defined(HAVE_SIGIO)
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my_extern int io_signum;
my_extern sigset_t io_ss;
my_extern long alt_firstread, alt_firstwrite;
my_extern long alt_curread, alt_curwrite;
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#endif
int64 io_waituntil2(int64 milliseconds);
void io_sigpipe(void);
/* return next descriptor from io_wait that can be read from */
int64 io_canread_unlocked();
/* return next descriptor from io_wait that can be written to */
int64 io_canwrite_unlocked();
/* return next descriptor with expired timeout */
int64 io_timeouted_unlocked();
struct eventpacket {
int fd;
enum { CANREAD, CANWRITE, TIMEOUT } what;
};
#define debug_printf(x)