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#include <efsw/FileWatcherKqueue.hpp>
#if EFSW_PLATFORM == EFSW_PLATFORM_KQUEUE || EFSW_PLATFORM == EFSW_PLATFORM_FSEVENTS
#include <dirent.h>
#include <efsw/Debug.hpp>
#include <efsw/FileSystem.hpp>
#include <efsw/Lock.hpp>
#include <efsw/System.hpp>
#include <efsw/WatcherGeneric.hpp>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <unistd.h>
namespace efsw {
FileWatcherKqueue::FileWatcherKqueue( FileWatcher* parent ) :
FileWatcherImpl( parent ),
mLastWatchID( 0 ),
mThread( NULL ),
mFileDescriptorCount( 1 ),
mAddingWatcher( false ) {
mTimeOut.tv_sec = 0;
mTimeOut.tv_nsec = 0;
mInitOK = true;
}
FileWatcherKqueue::~FileWatcherKqueue() {
WatchMap::iterator iter = mWatches.begin();
for ( ; iter != mWatches.end(); ++iter ) {
efSAFE_DELETE( iter->second );
}
mWatches.clear();
mInitOK = false;
efSAFE_DELETE( mThread );
}
WatchID FileWatcherKqueue::addWatch( const std::string& directory, FileWatchListener* watcher,
bool recursive ) {
static bool s_ug = false;
std::string dir( directory );
FileSystem::dirAddSlashAtEnd( dir );
FileInfo fi( dir );
if ( !fi.isDirectory() ) {
return Errors::Log::createLastError( Errors::FileNotFound, dir );
} else if ( !fi.isReadable() ) {
return Errors::Log::createLastError( Errors::FileNotReadable, dir );
} else if ( pathInWatches( dir ) ) {
return Errors::Log::createLastError( Errors::FileRepeated, directory );
}
std::string curPath;
std::string link( FileSystem::getLinkRealPath( dir, curPath ) );
if ( "" != link ) {
if ( pathInWatches( link ) ) {
return Errors::Log::createLastError( Errors::FileRepeated, directory );
} else if ( !linkAllowed( curPath, link ) ) {
return Errors::Log::createLastError( Errors::FileOutOfScope, dir );
} else {
dir = link;
}
}
/// Check first if are enough file descriptors available to create another kqueue watcher,
/// otherwise it creates a generic watcher
if ( availablesFD() ) {
mAddingWatcher = true;
WatcherKqueue* watch = new WatcherKqueue( ++mLastWatchID, dir, watcher, recursive, this );
{
Lock lock( mWatchesLock );
mWatches.insert( std::make_pair( mLastWatchID, watch ) );
}
watch->addAll();
// if failed to open the directory... erase the watcher
if ( !watch->initOK() ) {
int le = watch->lastErrno();
mWatches.erase( watch->ID );
efSAFE_DELETE( watch );
mLastWatchID--;
// Probably the folder has too many files, create a generic watcher
if ( EACCES != le ) {
WatcherGeneric* genericWatch =
new WatcherGeneric( ++mLastWatchID, dir, watcher, this, recursive );
Lock lock( mWatchesLock );
mWatches.insert( std::make_pair( mLastWatchID, genericWatch ) );
} else {
return Errors::Log::createLastError( Errors::Unspecified, link );
}
}
mAddingWatcher = false;
} else {
if ( !s_ug ) {
efDEBUG( "Started using generic watcher, file descriptor limit reached: %ld\n",
mFileDescriptorCount );
s_ug = true;
}
WatcherGeneric* watch = new WatcherGeneric( ++mLastWatchID, dir, watcher, this, recursive );
Lock lock( mWatchesLock );
mWatches.insert( std::make_pair( mLastWatchID, watch ) );
}
return mLastWatchID;
}
void FileWatcherKqueue::removeWatch( const std::string& directory ) {
Lock lock( mWatchesLock );
WatchMap::iterator iter = mWatches.begin();
for ( ; iter != mWatches.end(); ++iter ) {
if ( directory == iter->second->Directory ) {
removeWatch( iter->first );
return;
}
}
}
void FileWatcherKqueue::removeWatch( WatchID watchid ) {
Lock lock( mWatchesLock );
WatchMap::iterator iter = mWatches.find( watchid );
if ( iter == mWatches.end() )
return;
Watcher* watch = iter->second;
mWatches.erase( iter );
efSAFE_DELETE( watch );
}
bool FileWatcherKqueue::isAddingWatcher() const {
return mAddingWatcher;
}
void FileWatcherKqueue::watch() {
if ( NULL == mThread ) {
mThread = new Thread( &FileWatcherKqueue::run, this );
mThread->launch();
}
}
void FileWatcherKqueue::run() {
do {
{
Lock lock( mWatchesLock );
for ( WatchMap::iterator it = mWatches.begin(); it != mWatches.end(); ++it ) {
it->second->watch();
}
}
System::sleep( 500 );
} while ( mInitOK );
}
void FileWatcherKqueue::handleAction( Watcher* /*watch*/, const std::string& /*filename*/,
unsigned long /*action*/, std::string /*oldFilename*/ ) {}
std::list<std::string> FileWatcherKqueue::directories() {
std::list<std::string> dirs;
Lock lock( mWatchesLock );
WatchMap::iterator it = mWatches.begin();
for ( ; it != mWatches.end(); ++it ) {
dirs.push_back( it->second->Directory );
}
return dirs;
}
bool FileWatcherKqueue::pathInWatches( const std::string& path ) {
WatchMap::iterator it = mWatches.begin();
for ( ; it != mWatches.end(); ++it ) {
if ( it->second->Directory == path ) {
return true;
}
}
return false;
}
void FileWatcherKqueue::addFD() {
mFileDescriptorCount++;
}
void FileWatcherKqueue::removeFD() {
mFileDescriptorCount--;
}
bool FileWatcherKqueue::availablesFD() {
return mFileDescriptorCount <= (Int64)System::getMaxFD() - 500;
}
} // namespace efsw
#endif
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