1 /*
2  * Copyright 2011, Ben Langmead <langmea@cs.jhu.edu>
3  *
4  * This file is part of Bowtie 2.
5  *
6  * Bowtie 2 is free software: you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation, either version 3 of the License, or
9  * (at your option) any later version.
10  *
11  * Bowtie 2 is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with Bowtie 2.  If not, see <http://www.gnu.org/licenses/>.
18  */
19 
20 #ifndef THREADING_H_
21 #define THREADING_H_
22 
23 #include <iostream>
24 #include "tinythread.h"
25 #include "fast_mutex.h"
26 
27 #ifdef NO_SPINLOCK
28 #   define MUTEX_T tthread::mutex
29 #else
30 #  	define MUTEX_T tthread::fast_mutex
31 #endif /* NO_SPINLOCK */
32 
33 
34 /**
35  * Wrap a lock; obtain lock upon construction, release upon destruction.
36  */
37 class ThreadSafe {
38 public:
39     ThreadSafe(MUTEX_T* ptr_mutex, bool locked = true) {
40 		if(locked) {
41 		    this->ptr_mutex = ptr_mutex;
42 		    ptr_mutex->lock();
43 		}
44 		else
45 		    this->ptr_mutex = NULL;
46 	}
47 
~ThreadSafe()48 	~ThreadSafe() {
49 	    if (ptr_mutex != NULL)
50 	        ptr_mutex->unlock();
51 	}
52 
53 private:
54 	MUTEX_T *ptr_mutex;
55 };
56 
57 #endif
58