PC World Komputer 1997 May/Pcwk0597.iso/sybase/starbuck/samples.z/TokenIssuer.wxc

Text File | 1996-12-10 | 3KB | 148 lines

Save Format v1.3
@begin ClassFile "TokenIssuer"
 Exported 1;
 Abstract 0;
 Interface 0;
 PackageName "";
 Language "Java";

 @begin UserFunction "TokenIssuer(int maxTokens)"
  GencodeSrcLine 10;
  FunctionName "TokenIssuer::TokenIssuer(int maxTokens)";
 @end;

 @begin UserFunction "Prototype for TokenIssuer(int maxTokens)"
  Private 1;
  GencodeSrcLine -1;
  FunctionName "TokenIssuer::Prototype for TokenIssuer(int maxTokens)";
 @end;

 @begin UserFunction "getToken()"
  GencodeSrcLine 24;
  FunctionName "TokenIssuer::getToken()";
 @end;

 @begin UserFunction "Prototype for getToken()"
  Private 1;
  GencodeSrcLine -1;
  FunctionName "TokenIssuer::Prototype for getToken()";
 @end;

 @begin UserFunction "relinquishToken()"
  GencodeSrcLine 35;
  FunctionName "TokenIssuer::relinquishToken()";
 @end;

 @begin UserFunction "Prototype for relinquishToken()"
  Private 1;
  GencodeSrcLine -1;
  FunctionName "TokenIssuer::Prototype for relinquishToken()";
 @end;

 @begin HPPPrefixBlock
@begin-code HPPPrefix

// add your custom import statements here

@end-code;
  GencodeSrcLine 6;
 @end;

 @begin CPPPrefixBlock
@begin-code CPPPrefix


@end-code;
  GencodeSrcLine -1;
 @end;

 @begin ClassContentsBlock
@begin-code ClassContents

    // add your data members here
    int _maxTokens;
    int _issuedTokens = 0;

@end-code;
  GencodeSrcLine 41;
 @end;

@begin-code BaseClassList

extends Object

@end-code;

@begin-code GeneratedClassContents


@end-code;

@begin-code Code "TokenIssuer::TokenIssuer(int maxTokens)"

//****************************
/**
 * This class issues tokens to running threads and
 * causes threads to wait when there are no tokens
 * available.  The number of tokens is supplied in
 * the constructor and synchronized methods are used
 * to eliminate concurrency issues.
*/

    public @CLASSNAME@(int maxTokens)
    //****************************
    {
        _maxTokens = maxTokens;
    }

@end-code;

@begin-code Code "TokenIssuer::Prototype for TokenIssuer(int maxTokens)"

    public:
        void @CLASSNAME@(int maxTokens);

@end-code;

@begin-code Code "TokenIssuer::getToken()"

    public synchronized void getToken()
    //****************************
    {
        while (_issuedTokens == _maxTokens) {
            try {
                wait();
            } catch (InterruptedException InTokenLine) {}
        }
        _issuedTokens++;
        return;
    }

@end-code;

@begin-code Code "TokenIssuer::Prototype for getToken()"

    public:
        syncronized boolean getToken();

@end-code;

@begin-code Code "TokenIssuer::relinquishToken()"

    public synchronized void relinquishToken()
    //****************************
    {
        _issuedTokens--;
        notifyAll();
    }

@end-code;

@begin-code Code "TokenIssuer::Prototype for relinquishToken()"

    public:
        syncronized void relinquishToken();

@end-code;
@end;