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/*
Copyright (C) 2010-2012 Florian Jung
This file is part of flo's FM synth.
flo's FM synth is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
flo's FM synth is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with flo's FM synth. If not, see <http://www.gnu.org/licenses/>.
*/
#include "defines.h"
#ifdef WATCHFILES
#include <iostream>
#include <pthread.h>
#include <unistd.h>
#include <sys/inotify.h>
#include "watch_files.h"
#include "util.h"
#include "globals.h"
#include "in_synth_cli.h"
using namespace std;
int fd=-1;
map<int, set<int> > inotify_map;
pthread_mutex_t inotify_map_mutex;
void watch_files_cleanup(void* unused)
{
if (fd==-1)
{
output_verbose("NOTE: no cleaning necessary for watch-files-thread");
}
else
{
output_verbose("NOTE: cleaning up for watch-files-thread...");
}
}
void* watch_files(void* unused)
{
pthread_cleanup_push(watch_files_cleanup, NULL);
pthread_mutex_init(&inotify_map_mutex, NULL);
fd=inotify_init();
if (fd==-1)
{
output_warning("WARNING: could not initalize inotify. you must inform me about\n"
" updated files manually.");
while (true) sleep(10);
}
else
{
for (int i=0;i<128;i++) // add watches for all loaded programs
if (programfile[i]!="")
add_watch(i);
inotify_event ev;
size_t s;
while (true)
{
s=read (fd, &ev, sizeof(inotify_event));
while (s<sizeof(inotify_event))
s+=read (fd,(char*)&ev + s, sizeof(inotify_event)-s);
pthread_mutex_lock(&inotify_map_mutex);
if (ev.mask & IN_MODIFY)
{
if (verbose)
{
string str="";
set<int>& tmp=inotify_map[ev.wd];
for (set<int>::iterator it=tmp.begin(); it!=tmp.end(); it++)
str+="#"+IntToStr(*it)+" ";
output_verbose("NOTE: reloading programs "+str+"...");
}
set<int>& tmp=inotify_map[ev.wd];
for (set<int>::iterator it=tmp.begin(); it!=tmp.end(); it++)
lock_and_load_program_no_watch_updates(*it, programfile[*it]);
}
else if (ev.mask & (IN_MOVE_SELF | IN_DELETE_SELF))
{
if (verbose)
{
string str="";
set<int>& tmp=inotify_map[ev.wd];
for (set<int>::iterator it=tmp.begin(); it!=tmp.end(); it++)
str+="#"+IntToStr(*it)+" ";
output_verbose("NOTE: removed watch for programs "+str);
}
inotify_map.erase(ev.wd);
inotify_rm_watch(fd,ev.wd);
}
else if (ev.mask != IN_IGNORED)
{
output_note("NOTE: in watch_files-thread: unknown event received ("+IntToStrHex(ev.mask)+")");
}
pthread_mutex_unlock(&inotify_map_mutex);
}
}
pthread_cleanup_pop(0);
}
void remove_watch(int prog)
{
if (watchfiles)
{
map<int, set<int> >::iterator mit;
set<int>* tmp;
set<int>::iterator sit;
pthread_mutex_lock(&inotify_map_mutex);
//search in all known watch descriptors
for (mit=inotify_map.begin(); mit!=inotify_map.end(); mit++)
{
tmp=&(mit->second);
sit=tmp->find(prog);
//search for some wd which affects $prog
if (sit!=tmp->end()) //found?
{
//erase $prog from the affect-set
tmp->erase(sit);
if (tmp->empty())
{
//if the affect-set is now empty, we can garbage-collect
//the wd (i.e., remove it)
cout << "garbage collecting wd #"<<mit->first<<endl;
inotify_rm_watch(fd, mit->first);
inotify_map.erase(mit);
}
//we're done now
break;
}
}
pthread_mutex_unlock(&inotify_map_mutex);
}
}
void add_watch(int prog)
{
if (watchfiles)
{
int wd=inotify_add_watch(fd, programfile[prog].c_str(), IN_MODIFY | IN_MOVE_SELF | IN_DELETE_SELF);
pthread_mutex_lock(&inotify_map_mutex);
if (wd!=-1)
{
inotify_map[wd].insert(prog);
}
else
{
//TODO: warning
}
pthread_mutex_unlock(&inotify_map_mutex);
}
}
#endif
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