C version of java s synchronized keyword

Question

Does c  have its own version of the java  synchronized  keyword    I e  in java it can be specified either to a function  an object or a block of code  like so   public synchronized void doImportantStuff           dangerous code goes here      or  public void doImportantStuff           trivial stuff     synchronized someLock             dangerous code goes here

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Does c  have its own version of the java  synchronized  keyword     No  In C   you explicitly lock resources that you want to work on synchronously across asynchronous threads  lock opens a block  it doesn t work on method level   However  the underlying mechanism is similar since lock works by invoking Monitor Enter  and subsequently Monitor Exit  on the runtime  Java works the same way  according to the Sun documentation

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First - most classes will never need to be thread-safe  Use YAGNI  only apply thread-safety when you know you actually are going to use it  and test it    For the method-level stuff  there is  MethodImpl     MethodImpl MethodImplOptions Synchronized   public void SomeMethod       code       This can also be used on accessors  properties and events    private int i  public int SomeProperty        MethodImpl MethodImplOptions Synchronized       get   return i         MethodImpl MethodImplOptions Synchronized       set   i   value        Note that field-like events are synchronized by default  while auto-implemented properties are not   public int SomeProperty  get set      not synchronized public event EventHandler SomeEvent     synchronized   Personally  I don t like the implementation of MethodImpl as it locks this or typeof Foo  - which is against best practice  The preferred option is to use your own locks   private readonly object syncLock   new object    public void SomeMethod         lock syncLock       code          Note that for field-like events  the locking implementation is dependent on the compiler  in older Microsoft compilers it is a lock this    lock Type  - however  in more recent compilers it uses Interlocked updates - so thread-safe without the nasty parts   This allows more granular usage  and allows use of Monitor Wait Monitor Pulse etc to communicate between threads   A related blog entry  later revisited

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You can use the lock statement instead   I think this can only replace the second version   Also  remember that both synchronized and lock need to operate on an object

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static object Lock   new object     lock  Lock        do stuff

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Take note  with full paths the line   MethodImpl MethodImplOptions Synchronized   should look like   System Runtime CompilerServices MethodImpl System Runtime CompilerServices MethodImplOptions Synchronized

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