transmission/libtransmission/stats.c

257 lines
6.2 KiB
C

/*
* This file Copyright (C) Mnemosyne LLC
*
* This file is licensed by the GPL version 2. Works owned by the
* Transmission project are granted a special exemption to clause 2(b)
* so that the bulk of its code can remain under the MIT license.
* This exemption does not extend to derived works not owned by
* the Transmission project.
*
* $Id$
*/
#include "transmission.h"
#include "session.h"
#include "bencode.h"
#include "platform.h" /* tr_sessionGetConfigDir() */
#include "stats.h"
#include "utils.h" /* tr_buildPath */
/***
****
***/
static const struct tr_session_stats STATS_INIT = { 0.0f, 0, 0, 0, 0, 0 };
/** @brief Opaque, per-session data structure for bandwidth use statistics */
struct tr_stats_handle
{
tr_session_stats single;
tr_session_stats old;
time_t startTime;
bool isDirty;
};
static char*
getOldFilename( const tr_session * session )
{
return tr_buildPath( tr_sessionGetConfigDir( session ), "stats.benc", NULL );
}
static char*
getFilename( const tr_session * session )
{
return tr_buildPath( tr_sessionGetConfigDir( session ), "stats.json", NULL );
}
static void
loadCumulativeStats( const tr_session * session,
tr_session_stats * setme )
{
tr_benc top;
char * filename;
bool loaded = false;
filename = getFilename( session );
loaded = !tr_bencLoadFile( &top, TR_FMT_JSON, filename );
tr_free( filename );
if( !loaded )
{
filename = getOldFilename( session );
loaded = !tr_bencLoadFile( &top, TR_FMT_BENC, filename );
tr_free( filename );
}
if( loaded )
{
int64_t i;
if( tr_bencDictFindInt( &top, "downloaded-bytes", &i ) )
setme->downloadedBytes = (uint64_t) i;
if( tr_bencDictFindInt( &top, "files-added", &i ) )
setme->filesAdded = (uint64_t) i;
if( tr_bencDictFindInt( &top, "seconds-active", &i ) )
setme->secondsActive = (uint64_t) i;
if( tr_bencDictFindInt( &top, "session-count", &i ) )
setme->sessionCount = (uint64_t) i;
if( tr_bencDictFindInt( &top, "uploaded-bytes", &i ) )
setme->uploadedBytes = (uint64_t) i;
tr_bencFree( &top );
}
}
static void
saveCumulativeStats( const tr_session * session,
const tr_session_stats * s )
{
char * filename;
tr_benc top;
tr_bencInitDict( &top, 5 );
tr_bencDictAddInt( &top, "downloaded-bytes", s->downloadedBytes );
tr_bencDictAddInt( &top, "files-added", s->filesAdded );
tr_bencDictAddInt( &top, "seconds-active", s->secondsActive );
tr_bencDictAddInt( &top, "session-count", s->sessionCount );
tr_bencDictAddInt( &top, "uploaded-bytes", s->uploadedBytes );
filename = getFilename( session );
tr_deepLog( __FILE__, __LINE__, NULL, "Saving stats to \"%s\"", filename );
tr_bencToFile( &top, TR_FMT_JSON, filename );
tr_free( filename );
tr_bencFree( &top );
}
/***
****
***/
void
tr_statsInit( tr_session * session )
{
struct tr_stats_handle * stats = tr_new0( struct tr_stats_handle, 1 );
loadCumulativeStats( session, &stats->old );
stats->single.sessionCount = 1;
stats->startTime = tr_time( );
session->sessionStats = stats;
}
static struct tr_stats_handle *
getStats( const tr_session * session )
{
return session ? session->sessionStats : NULL;
}
void
tr_statsSaveDirty( tr_session * session )
{
struct tr_stats_handle * h = getStats( session );
if( ( h != NULL ) && h->isDirty )
{
tr_session_stats cumulative = STATS_INIT;
tr_sessionGetCumulativeStats( session, &cumulative );
saveCumulativeStats( session, &cumulative );
h->isDirty = false;
}
}
void
tr_statsClose( tr_session * session )
{
tr_statsSaveDirty( session );
tr_free( session->sessionStats );
session->sessionStats = NULL;
}
/***
****
***/
static void
updateRatio( tr_session_stats * setme )
{
setme->ratio = tr_getRatio( setme->uploadedBytes,
setme->downloadedBytes );
}
static void
addStats( tr_session_stats * setme,
const tr_session_stats * a,
const tr_session_stats * b )
{
setme->uploadedBytes = a->uploadedBytes + b->uploadedBytes;
setme->downloadedBytes = a->downloadedBytes + b->downloadedBytes;
setme->filesAdded = a->filesAdded + b->filesAdded;
setme->sessionCount = a->sessionCount + b->sessionCount;
setme->secondsActive = a->secondsActive + b->secondsActive;
updateRatio( setme );
}
void
tr_sessionGetStats( const tr_session * session,
tr_session_stats * setme )
{
const struct tr_stats_handle * stats = getStats( session );
if( stats )
{
*setme = stats->single;
setme->secondsActive = tr_time( ) - stats->startTime;
updateRatio( setme );
}
}
void
tr_sessionGetCumulativeStats( const tr_session * session,
tr_session_stats * setme )
{
const struct tr_stats_handle * stats = getStats( session );
tr_session_stats current = STATS_INIT;
if( stats )
{
tr_sessionGetStats( session, &current );
addStats( setme, &stats->old, &current );
}
}
void
tr_sessionClearStats( tr_session * session )
{
tr_session_stats zero;
zero.uploadedBytes = 0;
zero.downloadedBytes = 0;
zero.ratio = TR_RATIO_NA;
zero.filesAdded = 0;
zero.sessionCount = 0;
zero.secondsActive = 0;
session->sessionStats->isDirty = true;
session->sessionStats->single = session->sessionStats->old = zero;
session->sessionStats->startTime = tr_time( );
}
/**
***
**/
void
tr_statsAddUploaded( tr_session * session,
uint32_t bytes )
{
struct tr_stats_handle * s;
if( ( s = getStats( session ) ) )
{
s->single.uploadedBytes += bytes;
s->isDirty = true;
}
}
void
tr_statsAddDownloaded( tr_session * session,
uint32_t bytes )
{
struct tr_stats_handle * s;
if( ( s = getStats( session ) ) )
{
s->single.downloadedBytes += bytes;
s->isDirty = true;
}
}
void
tr_statsFileCreated( tr_session * session )
{
struct tr_stats_handle * s;
if( ( s = getStats( session ) ) )
s->single.filesAdded++;
}