114 lines
4.0 KiB
C
114 lines
4.0 KiB
C
/******************************************************************************
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* $Id$
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*
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* Copyright (c) 2005-2008 Transmission authors and contributors
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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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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void tr_fdInit( size_t openFileLimit,
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size_t globalPeerLimit );
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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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tr_bool tr_preallocate_file( const char * filename, uint64_t length );
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int64_t tr_lseek( int fd, int64_t offset, int whence );
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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. It's also used to ensure only one caller can
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* write to the file at a time. Callers check out a file, use it,
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* and then check it back in via tr_fdFileReturn() when done.
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*
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* - if `folder' doesn't exist, errno is set to ENOENT.
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* - if doWrite is true, subfolders in torrentFile are created if necessary.
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* - if doWrite is true, the target file is created if necessary.
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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_fdFileReturn
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* @see tr_fdFileClose
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*/
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int tr_fdFileCheckout( const char * folder,
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const char * torrentFile,
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tr_bool doWrite,
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tr_preallocation_mode preallocationMode,
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uint64_t desiredFileSize );
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/**
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* Returns an fd from tr_fdFileCheckout() so that other clients may borrow it.
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*
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* @see tr_fdFileCheckout
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* @see tr_fdFileClose
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*/
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void tr_fdFileReturn( int file );
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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 closed 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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* @see tr_fdFileReturn
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*/
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void tr_fdFileClose( const char * filename );
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/***********************************************************************
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* Sockets
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**********************************************************************/
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int tr_fdSocketCreate( int domain, int type );
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int tr_fdSocketAccept( int b,
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tr_address * addr,
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tr_port * port );
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void tr_fdSocketClose( 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( void );
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void tr_fdSetPeerLimit( uint16_t n );
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uint16_t tr_fdGetPeerLimit( void );
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