transmission/libtransmission/fdlimit.h

133 lines
4.6 KiB
C

/******************************************************************************
* $Id$
*
* Copyright (c) 2005-2010 Transmission authors and contributors
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*****************************************************************************/
#ifndef __TRANSMISSION__
#error only libtransmission should #include this header.
#endif
#include "transmission.h"
#include "net.h"
/**
* @addtogroup file_io File IO
* @{
*/
void tr_fdSetFileLimit( tr_session * session, int limit );
int tr_fdGetFileLimit( const tr_session * session );
void tr_fdSetGlobalPeerLimit( tr_session * session, int limit );
/***
****
***/
int tr_open_file_for_scanning( const char * filename );
int tr_open_file_for_writing( const char * filename );
void tr_close_file( int fd );
tr_bool tr_preallocate_file( const char * filename, uint64_t length );
int64_t tr_lseek( int fd, int64_t offset, int whence );
ssize_t tr_pread(int fd, void *buf, size_t count, off_t offset);
ssize_t tr_pwrite(int fd, void *buf, size_t count, off_t offset);
int tr_prefetch(int fd, off_t offset, size_t count);
/**
* Returns an fd to the specified filename.
*
* A small pool of open files is kept to avoid the overhead of
* continually opening and closing the same files when downloading
* piece data.
*
* - if doWrite is true, subfolders in torrentFile are created if necessary.
* - if doWrite is true, the target file is created if necessary.
*
* on success, a file descriptor >= 0 is returned.
* on failure, a -1 is returned and errno is set.
*
* @see tr_fdFileClose
*/
int tr_fdFileCheckout( tr_session * session,
int torrentId,
tr_file_index_t fileNum,
const char * fileName,
tr_bool doWrite,
tr_preallocation_mode preallocationMode,
uint64_t desiredFileSize );
int tr_fdFileGetCached( tr_session * session,
int torrentId,
tr_file_index_t fileNum,
tr_bool doWrite );
/**
* Closes a file that's being held by our file repository.
*
* If the file isn't checked out, it's closed immediately.
* If the file is currently checked out, it will be closed upon its return.
*
* @see tr_fdFileCheckout
*/
void tr_fdFileClose( tr_session * session,
const tr_torrent * tor,
tr_file_index_t fileNo );
/**
* Closes all the files associated with a given torrent id
*/
void tr_fdTorrentClose( tr_session * session, int torrentId );
/***********************************************************************
* Sockets
**********************************************************************/
int tr_fdSocketCreate( tr_session * session, int domain, int type );
int tr_fdSocketAccept( tr_session * session,
int b,
tr_address * addr,
tr_port * port );
void tr_fdSocketClose( tr_session * session, int s );
/***********************************************************************
* tr_fdClose
***********************************************************************
* Frees resources allocated by tr_fdInit.
**********************************************************************/
void tr_fdClose( tr_session * session );
void tr_fdSetPeerLimit( tr_session * session, int n );
int tr_fdGetPeerLimit( const tr_session * );
/* @} */