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Class core.sync.mutex.Mutex
This class represents a general purpose, recursive mutex.
class Mutex
: object .Object .Monitor
;
Implemented using pthread_mutex
on Posix and CRITICAL_SECTION
on Windows.
Constructors
Name | Description |
---|---|
this
()
|
Initializes a mutex object. |
this
(obj)
|
Initializes a mutex object and sets it as the monitor for obj .
|
Methods
Name | Description |
---|---|
lock
()
|
If this lock is not already held by the caller, the lock is acquired, then the internal counter is incremented by one. |
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
()
|
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. |
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
()
|
Decrements the internal lock count by one. If this brings the count to zero, the lock is released. |
unlock_nothrow
()
|
Decrements the internal lock count by one. If this brings the count to zero, the lock is released. |
factory
(classname)
|
Create instance of class specified by the fully qualified name classname. The class must either have no constructors or have a default constructor. |
opCmp
(o)
|
Compare with another Object obj. |
opEquals
(o)
|
Test whether this is equal to o .
The default implementation only compares by identity (using the is operator).
Generally, overrides and overloads for opEquals should attempt to compare objects by their contents.
A class will most likely want to add an overload that takes your specific type as the argument
and does the content comparison. Then you can override this and forward it to your specific
typed overload with a cast. Remember to check for null on the typed overload.
|
toHash
()
|
Compute hash function for Object. |
toString
()
|
Convert Object to a human readable string. |
Example
import core .thread : Thread;
class Resource
{
Mutex mtx;
int cargo;
this() shared @safe nothrow
{
mtx = new shared Mutex();
cargo = 42;
}
void useResource() shared @safe nothrow @nogc
{
mtx .lock_nothrow();
(cast() cargo) += 1;
mtx .unlock_nothrow();
}
}
shared Resource res = new shared Resource();
auto otherThread = new Thread(
{
foreach (i; 0 .. 10000)
res .useResource();
}) .start();
foreach (i; 0 .. 10000)
res .useResource();
otherThread .join();
writeln(res .cargo); // 20042
Authors
Sean Kelly
License
Copyright © 1999-2024 by the D Language Foundation | Page generated by ddox.