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/* Copyright (C) 2014 Wildfire Games.
*
* 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 "precompiled.h"
#include "lib/sysdep/dir_watch.h"
#include "lib/file/file_system.h"
#include "osx_sys_version.h"
#include "lib/os_path.h"
#include "lib/file/file.h"
#include "lib/posix/posix_filesystem.h" // mode_t
#include <AvailabilityMacros.h> // MAC_OS_X_VERSION_MIN_REQUIRED
#include <CoreFoundation/CoreFoundation.h>
#include <CoreServices/CoreServices.h>
#include "ps/CLogger.h"
static FSEventStreamRef g_Stream = NULL;
struct DirWatch
{
OsPath path;
int reqnum;
};
typedef std::vector<DirWatch> DirWatchMap;
static DirWatchMap g_Paths;
static DirWatchMap g_RootPaths;
static DirWatchNotifications g_QueuedDirs;
static bool CanRunNotifications()
{
int major = 0;
int minor = 0;
int bugfix = 0;
GetSystemVersion( major, minor, bugfix);
if ((major == 10 && minor >= 7) || major >= 11)
return true;
return false;
}
#if MAC_OS_X_VERSION_MIN_REQUIRED < 1070
#define kFSEventStreamCreateFlagFileEvents 0x00000010
#define kFSEventStreamEventFlagItemIsFile 0x00010000
#define kFSEventStreamEventFlagItemRemoved 0x00000200
#define kFSEventStreamEventFlagItemRenamed 0x00000800
#define kFSEventStreamEventFlagItemCreated 0x00000100
#define kFSEventStreamEventFlagItemModified 0x00001000
#endif
static void fsevent_callback(
ConstFSEventStreamRef UNUSED(streamRef),
void * UNUSED(clientCallBackInfo),
size_t numEvents,
void *eventPaths,
const FSEventStreamEventFlags eventFlags[],
const FSEventStreamEventId UNUSED(eventIds)[] )
{
unsigned long i;
char **paths = (char **)eventPaths;
for (i=0; i<numEvents; i++)
{
bool isWatched = false;
OsPath eventPath = OsPath(paths[i]);
unsigned long eventType = eventFlags[i];
if ( eventPath.Filename().string().c_str()[0] != '.' )
{
for ( DirWatchMap::iterator it = g_Paths.begin() ; it != g_Paths.end(); ++it)
if ( path_is_subpath( it->path.string().c_str(), eventPath.string().c_str() ) )
isWatched = true;
}
if ( ! isWatched )
return;
OsPath filename = Path( eventPath.string().c_str() );
if ( eventType & kFSEventStreamEventFlagItemIsFile)
{
if ( eventType & kFSEventStreamEventFlagItemRemoved )
g_QueuedDirs.push_back(DirWatchNotification( filename.string().c_str(), DirWatchNotification::Deleted ));
else if ( eventType & kFSEventStreamEventFlagItemRenamed )
g_QueuedDirs.push_back(DirWatchNotification( filename.string().c_str(), DirWatchNotification::Deleted ));
else if ( eventType & kFSEventStreamEventFlagItemCreated )
g_QueuedDirs.push_back(DirWatchNotification( filename.string().c_str(), DirWatchNotification::Created ));
else if ( eventType & kFSEventStreamEventFlagItemModified )
g_QueuedDirs.push_back(DirWatchNotification( filename.string().c_str(), DirWatchNotification::Changed ));
}
}
}
static FSEventStreamRef CreateEventStream( DirWatchMap path )
{
if ( ( g_Stream == NULL ) && CanRunNotifications() && !path.empty() )
{
CFStringRef* pathLists = (CFStringRef*)malloc( sizeof(CFStringRef*) * path.size() );
int index = 0;
for ( DirWatchMap::iterator it = path.begin() ; it != path.end(); ++it)
{
pathLists[index] = CFStringCreateWithFileSystemRepresentation( NULL, OsString(it->path).c_str());
index++;
}
CFArrayRef pathsToWatch = CFArrayCreate(NULL, (const void **)pathLists, index, NULL);
FSEventStreamContext *callbackInfo = NULL;
FSEventStreamRef stream = FSEventStreamCreate(NULL, &fsevent_callback, callbackInfo, pathsToWatch,
kFSEventStreamEventIdSinceNow, 1.0, kFSEventStreamCreateFlagFileEvents );
CFRelease( pathsToWatch );
free( pathLists );
FSEventStreamScheduleWithRunLoop(stream, CFRunLoopGetCurrent(), kCFRunLoopDefaultMode);
if (!FSEventStreamStart(stream))
debug_warn(L"event_loop FSEventStreamStart failed!");
else
return stream;
}
return NULL;
}
static void DeleteEventStream()
{
if ( g_Stream != NULL )
{
FSEventStreamStop(g_Stream);
FSEventStreamInvalidate(g_Stream);
FSEventStreamRelease(g_Stream);
g_Stream = NULL;
}
}
Status dir_watch_Add(const OsPath& path, PDirWatch& dirWatch)
{
PDirWatch tmpDirWatch(new DirWatch);
dirWatch.swap(tmpDirWatch);
dirWatch->path = path;
dirWatch->reqnum = 0;
g_Paths.push_back( *dirWatch );
bool alreadyInsideRootPath = false;
for ( DirWatchMap::iterator it = g_RootPaths.begin() ; it != g_RootPaths.end(); ++it)
{
if ( path_is_subpath( path.string().c_str(), it->path.string().c_str() ) )
alreadyInsideRootPath = true;
}
if ( !alreadyInsideRootPath )
{
DeleteEventStream();
g_RootPaths.push_back( *dirWatch );
}
return INFO::OK;
}
Status dir_watch_Poll(DirWatchNotifications& notifications)
{
if ( g_Stream == NULL )
{
g_Stream = CreateEventStream( g_RootPaths );
}
else
{
for ( DirWatchNotifications::iterator it = g_QueuedDirs.begin() ; it != g_QueuedDirs.end(); ++it)
notifications.push_back(DirWatchNotification( *it ));
g_QueuedDirs.clear();
}
return INFO::OK;
}
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