Mutex

Constructors

this

this()

Initializes a mutex object.

this

this(Object obj)

Initializes a mutex object and sets it as the monitor for obj.

Destructor

A destructor is present on this object, but not explicitly documented in the source.

Members

Functions

lock

void lock()

lock_nothrow

void lock_nothrow()

If this lock is not already held by the caller, the lock is acquired, then the internal counter is incremented by one.

tryLock

bool tryLock()

tryLock_nothrow

bool tryLock_nothrow()

If the lock is held by another caller, the method returns. Otherwise, the lock is acquired if it is not already held, and then the internal counter is incremented by one.

unlock

void unlock()

unlock_nothrow

void unlock_nothrow()

Decrements the internal lock count by one. If this brings the count to zero, the lock is released.

1 import core.thread : Thread;
2 
3 class Resource
4 {
5     Mutex mtx;
6     int cargo;
7 
8     this() shared @safe nothrow
9     {
10         mtx = new shared Mutex();
11         cargo = 42;
12     }
13 
14     void useResource() shared @safe nothrow @nogc
15     {
16         mtx.lock_nothrow();
17         (cast() cargo) += 1;
18         mtx.unlock_nothrow();
19     }
20 }
21 
22 shared Resource res = new shared Resource();
23 
24 auto otherThread = new Thread(
25 {
26     foreach (i; 0 .. 10000)
27         res.useResource();
28 }).start();
29 
30 foreach (i; 0 .. 10000)
31     res.useResource();
32 
33 otherThread.join();
34 
35 assert (res.cargo == 20042);

• Mutex