transmission/libtransmission/choking.c

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/******************************************************************************
* Copyright (c) 2006 Eric Petit
*
* 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.
*****************************************************************************/
#include "transmission.h"
#define MAX_HISTORY 30
struct tr_choking_s
{
tr_lock_t lock;
tr_handle_t * h;
int slotsMax;
int slotsUsed;
};
tr_choking_t * tr_chokingInit( tr_handle_t * h )
{
tr_choking_t * c;
c = calloc( sizeof( tr_choking_t ), 1 );
c->h = h;
c->slotsMax = 4242;
tr_lockInit( &c->lock );
return c;
}
void tr_chokingSetLimit( tr_choking_t * c, int limit )
{
tr_lockLock( &c->lock );
if( limit < 0 )
c->slotsMax = 4242;
else
c->slotsMax = lrintf( sqrt( 2 * limit ) );
tr_lockUnlock( &c->lock );
}
void tr_chokingPulse( tr_choking_t * c )
{
tr_lockLock( &c->lock );
tr_lockUnlock( &c->lock );
}
void tr_chokingClose( tr_choking_t * c )
{
tr_lockClose( &c->lock );
free( c );
}