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/*********************************************************************************
* COPYRIGHT NOTICE:
* Copyright © 2014 Andrew Smith (GNA SERVICES INC) <Andrew@GNAServicesInc.com>
* All Rights Reserved.
*
* This file, tpad_tree.c , is part of tpad.
*
* tpad 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.
*
* tpad 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 tpad. If not, see <http://www.gnu.org/licenses/>.
********************************************************************************/
#include "tpad_headers.h"
#include <pthread.h>
pthread_mutex_t mutex1 = PTHREAD_MUTEX_INITIALIZER;
pthread_mutex_t mutex2 = PTHREAD_MUTEX_INITIALIZER;
pthread_mutex_t mutex1b = PTHREAD_MUTEX_INITIALIZER;
pthread_mutex_t mutex2b = PTHREAD_MUTEX_INITIALIZER;
pthread_mutex_t mutex1c = PTHREAD_MUTEX_INITIALIZER;
pthread_mutex_t mutex2c = PTHREAD_MUTEX_INITIALIZER;
pthread_mutex_t mutex3 = PTHREAD_MUTEX_INITIALIZER;
pthread_mutex_t mutex4 = PTHREAD_MUTEX_INITIALIZER;
pthread_mutex_t count_mutex = PTHREAD_MUTEX_INITIALIZER;
pthread_mutex_t cond_mutex = PTHREAD_MUTEX_INITIALIZER;
pthread_cond_t cond_got_request = PTHREAD_COND_INITIALIZER;
extern int tpad_wach_thread_set;
extern unsigned char M_HASH_SLOT_ONE[];
extern unsigned char M_HASH_SLOT_TWO[];
extern gboolean disable_file_watch;
extern int iexit;
//extern pthread_t thread1, thread2;
extern pthread_t rCurrent;
extern int modBalance;
extern int itog;
extern int iiit;
extern GtkSourceBuffer *mBuff;
extern gboolean save_locked;
extern GtkWidget *window;
extern gchar* origfile;
extern int madetemp;
int itog=0;
int iiit=1;
pthread_t rCurrent;
int iexit=0;
unsigned char M_HASH_SLOT_ONE[64];
unsigned char M_HASH_SLOT_TWO[64];
static void tpad_watch_copy_two_to_one();
static void tpad_watch_copy_one_to_two();
static void *tpad_watch_sig(void *arg);
static unsigned char* tpad_watch_file_hash_get(char file[]);
static void *tpad_watch_threadproc(void *arg);
static void tpad_watch_file_to_one(char* fpath);
static void tpad_watch_free_two_and_one();
static void tpad_watch_file_to_two(char* fpath);
static void tpad_watch_file_to_one(char* fpath);
static void tpad_watch_free_one();
static void tpad_watch_free_two();
static void copy_to_one(void* sString);
static void copy_to_two(void* sString);
static void tpad_watch_copy_thid(pthread_t ThisThread);
static void tpad_watch_copy_thid(pthread_t ThisThread){
pthread_mutex_lock( &mutex1c );
while ( pthread_mutex_trylock(&mutex2c) ){
pthread_mutex_unlock(&mutex1c);
pthread_yield();
sleep(WATCH_STALL_TIME);
pthread_mutex_lock(&mutex1c);
}
memcpy((void*) &rCurrent, (void*) &ThisThread,sizeof(pthread_t) );
pthread_mutex_unlock(&mutex1c);
pthread_mutex_unlock(&mutex2c);
}
static void copy_to_one(void* sString){
pthread_mutex_lock( &mutex1 );
while ( pthread_mutex_trylock(&mutex2) ){
pthread_mutex_unlock(&mutex1);
pthread_yield();
sleep(WATCH_STALL_TIME);
pthread_mutex_lock(&mutex1);
}
memcpy( (void*) M_HASH_SLOT_ONE, (void*) sString, 64);
pthread_mutex_unlock(&mutex1);
pthread_mutex_unlock(&mutex2);
}
static void copy_to_two(void* sString){
pthread_mutex_lock( &mutex1b );
while ( pthread_mutex_trylock(&mutex2b) ){
pthread_mutex_unlock(&mutex1b);
pthread_yield();
sleep(WATCH_STALL_TIME);
pthread_mutex_lock(&mutex1b);
}
memcpy( (void*) M_HASH_SLOT_TWO, (void*) sString, 64);
pthread_mutex_unlock(&mutex1b);
pthread_mutex_unlock(&mutex2b);
}
static void tpad_watch_file_to_one(char* fpath){
if( fpath != NULL && strlen(fpath) > 2) copy_to_one((void*)tpad_watch_file_hash_get(fpath));
}
static void tpad_watch_file_to_two(char* fpath){
if( fpath != NULL && strlen(fpath) > 2) copy_to_two((void*)tpad_watch_file_hash_get(fpath));
}
static void tpad_watch_free_one(){
pthread_mutex_lock( &mutex1 );
while ( pthread_mutex_trylock(&mutex2) ){
pthread_mutex_unlock(&mutex1);
pthread_yield();
sleep(WATCH_STALL_TIME);
pthread_mutex_lock(&mutex1);
}
memset( (void*) M_HASH_SLOT_ONE, 0, 64);
pthread_mutex_unlock(&mutex1);
pthread_mutex_unlock(&mutex2);
}
static void tpad_watch_free_two(){
pthread_mutex_lock( &mutex1b );
while ( pthread_mutex_trylock(&mutex2b) ){
pthread_mutex_unlock(&mutex1b);
pthread_yield();
sleep(WATCH_STALL_TIME);
pthread_mutex_lock(&mutex1b);
}
memset( (void*) M_HASH_SLOT_TWO, 0, 64);
pthread_mutex_unlock(&mutex1b);
pthread_mutex_unlock(&mutex2b);
}
static void tpad_watch_copy_two_to_one(){
copy_to_one(M_HASH_SLOT_TWO);
}
static void tpad_watch_copy_one_to_two(){
copy_to_two(M_HASH_SLOT_ONE);
}
static void tpad_watch_free_two_and_one(){
tpad_watch_free_one();
tpad_watch_free_two();
}
static void tpad_watch_check_file_init(char* fpath){
tpad_watch_free_two_and_one();
tpad_watch_file_to_one( (char*) fpath);
tpad_watch_copy_one_to_two();
}
static unsigned char* tpad_watch_file_hash_get(char file[]){
if(file == NULL) return("--\n");
if(strlen(file) <= 2 || strlen(file) > FILENAME_MAX ) return("--\n");
if(access(file, R_OK ) == -1) return("--\n");
return ((unsigned char*) str2sha512(tpad_hash_read_in_file(file)));
}
static void *tpad_watch_threadproc(void *arg){
tpad_watch_copy_thid((pthread_t) pthread_self() );
if (disable_file_watch) return(NULL);
if(iexit){
tpad_modbal_set_zero();
tpad_watch_free_two_and_one();
}
char* fpath = (char*) arg;
tpad_watch_check_file_init(fpath);
if(iexit){
tpad_modbal_set_zero();
tpad_watch_free_two_and_one();
}
do{
if(iexit){
tpad_modbal_set_zero();
tpad_watch_free_two_and_one();
}
pthread_mutex_lock( &mutex3 );
if(iexit){
tpad_modbal_set_zero();
tpad_watch_free_two_and_one();
pthread_mutex_unlock(&mutex3);
return(NULL);
}
while ( pthread_mutex_trylock(&mutex4) ){
pthread_mutex_unlock(&mutex3);
if(iexit) {
tpad_modbal_set_zero();
tpad_watch_free_two_and_one();
return(NULL);
}
else pthread_yield();
struct timespec asleeprqtp;
asleeprqtp.tv_sec = 0;
asleeprqtp.tv_nsec = 500000000L;
if(nanosleep(&asleeprqtp , NULL) != 0 ) sleep(WATCH_PROC_SLEEP_LENGTH);
if(iexit) {
tpad_modbal_set_zero();
tpad_watch_free_two_and_one();
return(NULL);
}
else pthread_yield();
pthread_mutex_lock(&mutex3);
}
if(iexit) {
tpad_modbal_set_zero();
tpad_watch_free_two_and_one();
pthread_mutex_unlock(&mutex3);
pthread_mutex_unlock(&mutex4);
return(NULL);
}
if(!tpad_modbal_check_armed()){
if (memcmp( (void*) M_HASH_SLOT_ONE, (void*) tpad_watch_file_hash_get(fpath), 64) != 0){
fprintf(stdout,"FILE CHANGED!\n");
fflush(stdout);
if(iexit) {
tpad_modbal_set_zero();
tpad_watch_free_two_and_one();
pthread_mutex_unlock(&mutex3);
pthread_mutex_unlock(&mutex4);
return(NULL);
}
else tpad_modbal_set_one();
tpad_watch_check_file_init(fpath);
}else pthread_yield();
}else pthread_yield();
if(iexit) {
tpad_modbal_set_zero();
tpad_watch_free_two_and_one();
pthread_mutex_unlock(&mutex3);
pthread_mutex_unlock(&mutex4);
return(NULL);
}
//else {
//IS Armed
//}
struct timespec lsleeprqtp;
if(iexit) {
tpad_modbal_set_zero();
tpad_watch_free_two_and_one();
pthread_mutex_unlock(&mutex3);
pthread_mutex_unlock(&mutex4);
return(NULL);
}
lsleeprqtp.tv_sec = 0;
if(iexit) {
tpad_modbal_set_zero();
tpad_watch_free_two_and_one();
pthread_mutex_unlock(&mutex3);
pthread_mutex_unlock(&mutex4);
return(NULL);
}
lsleeprqtp.tv_nsec = 500000000L;
if(iexit) {
tpad_modbal_set_zero();
tpad_watch_free_two_and_one();
pthread_mutex_unlock(&mutex3);
pthread_mutex_unlock(&mutex4);
return(NULL);
}
if(nanosleep(&lsleeprqtp , NULL) != 0 ) sleep(WATCH_PROC_SLEEP_LENGTH);
if(iexit) {
tpad_modbal_set_zero();
tpad_watch_free_two_and_one();
pthread_mutex_unlock(&mutex3);
pthread_mutex_unlock(&mutex4);
return(NULL);
}
pthread_mutex_unlock(&mutex3);
pthread_mutex_unlock(&mutex4);
if(iexit) {
tpad_modbal_set_zero();
tpad_watch_free_two_and_one();
return(NULL);
} else pthread_yield();
} while(!iexit);
tpad_modbal_set_zero();
tpad_watch_free_two_and_one();
return(NULL);
}
void tpad_watch_exit(){
// Disabled for now //
/*
iexit=1;
if(rCurrent && tpad_wach_thread_set) pthread_join((pthread_t)rCurrent,NULL);
tpad_wach_thread_set=FALSE;
rCurrent=(pthread_t) NULL;
*/
}
void tpad_watch_fname(){
// Disabled for now //
/*
pthread_t thread;
tpad_wach_thread_set=TRUE;
pthread_create( &thread, NULL, &tpad_watch_threadproc, (void*) tpad_fp_get_current());
*/
}
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