You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
140 lines
3.7 KiB
C
140 lines
3.7 KiB
C
#ifndef my_extern
|
|
#define my_extern extern
|
|
#endif
|
|
|
|
#include "libowfat/io.h"
|
|
#include "libowfat/array.h"
|
|
#include "libowfat/iarray.h"
|
|
#ifdef __MINGW32__
|
|
#include "socket.h"
|
|
my_extern HANDLE io_comport;
|
|
#else
|
|
#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 */
|
|
unsigned int zerocopy:1; /* linux: setsockopt SO_ZEROCOPY done */
|
|
#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;
|
|
long next_defer;
|
|
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;
|
|
my_extern uint64 io_wanted_fds;
|
|
my_extern array io_pollfds;
|
|
|
|
my_extern long first_readable;
|
|
my_extern long first_writeable;
|
|
|
|
extern long first_deferred;
|
|
|
|
my_extern enum __io_waitmode {
|
|
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
|
|
} io_waitmode;
|
|
|
|
#if defined(HAVE_KQUEUE) || defined(HAVE_EPOLL) || defined(HAVE_DEVPOLL)
|
|
my_extern int io_master;
|
|
#endif
|
|
#if defined(HAVE_SIGIO)
|
|
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;
|
|
#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)
|
|
|
|
struct iom_entry {
|
|
void* cookie;
|
|
};
|