mirror of
https://github.com/transmission/transmission
synced 2024-12-26 01:27:28 +00:00
127 lines
4 KiB
C
127 lines
4 KiB
C
/*
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* This file Copyright (C) Mnemosyne LLC
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*
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* This file is licensed by the GPL version 2. Works owned by the
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* Transmission project are granted a special exemption to clause 2(b)
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* so that the bulk of its code can remain under the MIT license.
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* This exemption does not extend to derived works not owned by
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* the Transmission project.
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*
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* $Id$
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*/
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#ifndef __TRANSMISSION__
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#error only libtransmission should #include this header.
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#endif
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#include "transmission.h"
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#include "net.h"
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/**
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* @addtogroup file_io File IO
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* @{
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*/
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void tr_fdSetFileLimit( tr_session * session, int limit );
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int tr_fdGetFileLimit( tr_session * session );
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void tr_fdSetGlobalPeerLimit( tr_session * session, int limit );
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/***
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****
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***/
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void tr_set_file_for_single_pass( int fd );
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int tr_open_file_for_scanning( const char * filename );
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int tr_open_file_for_writing( const char * filename );
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void tr_close_file( int fd );
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int tr_fsync(int fd);
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ssize_t tr_pread(int fd, void *buf, size_t count, off_t offset);
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ssize_t tr_pwrite(int fd, const void *buf, size_t count, off_t offset);
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int tr_prefetch(int fd, off_t offset, size_t count);
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/**
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* Returns an fd to the specified filename.
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*
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* A small pool of open files is kept to avoid the overhead of
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* continually opening and closing the same files when downloading
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* piece data.
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*
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* - if do_write is true, subfolders in torrentFile are created if necessary.
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* - if do_write is true, the target file is created if necessary.
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*
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* @param existing_dir An ancestor of filename which must already exist and
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* won't be created by tr_fdFileCheckout(). This prevents
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* directories from being created in error, such as a mount
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* point for an external drive when the drive is unplugged.
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*
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* on success, a file descriptor >= 0 is returned.
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* on failure, a -1 is returned and errno is set.
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*
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* @see tr_fdFileClose
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*/
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int tr_fdFileCheckout( tr_session * session,
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int torrent_id,
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tr_file_index_t file_num,
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const char * existing_dir,
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const char * filename,
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bool do_write,
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tr_preallocation_mode preallocation_mode,
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uint64_t preallocation_file_size );
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int tr_fdFileGetCached( tr_session * session,
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int torrent_id,
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tr_file_index_t file_num,
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bool doWrite );
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/**
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* Closes a file that's being held by our file repository.
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*
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* If the file isn't checked out, it's fsync()ed and close()d immediately.
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* If the file is currently checked out, it will be closed upon its return.
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*
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* @see tr_fdFileCheckout
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*/
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void tr_fdFileClose( tr_session * session,
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const tr_torrent * tor,
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tr_file_index_t file_num );
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/**
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* Closes all the files associated with a given torrent id
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*/
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void tr_fdTorrentClose( tr_session * session, int torrentId );
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/***********************************************************************
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* Sockets
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**********************************************************************/
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int tr_fdSocketCreate( tr_session * session, int domain, int type );
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int tr_fdSocketAccept( tr_session * session,
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int listening_sockfd,
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tr_address * addr,
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tr_port * port );
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void tr_fdSocketClose( tr_session * session, int s );
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/***********************************************************************
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* tr_fdClose
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***********************************************************************
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* Frees resources allocated by tr_fdInit.
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**********************************************************************/
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void tr_fdClose( tr_session * session );
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void tr_fdSetPeerLimit( tr_session * session, int n );
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int tr_fdGetPeerLimit( const tr_session * );
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/* @} */
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