SemaCondvar version 1.15

SemaCondvar version 1.15


Hello,

SemaCondvar version 1.15

Author: Amine Moulay Ramdane.


Click here to download the zip file:
Zip (for FreePascal and Lazarus and Delphi 7 to 2010)

Click here to download the zip file: Zip (for Delphi XE1 to XE4)

Description:

SemaCondvar and SemaMonitor are new and portable synchronization objects , SemaCondvar combines all the charateristics of a semaphore and a condition variable and SemaMonitor combines all charateristics of a semaphore and an eventcount , they only use an event object and and a very fast and very efficient and portable FIFO fair Lock , so they are fast and they are FIFO fair.

Now you can pass the SemCondvar's initialcount  and SemCondvar's MaximumCount to the construtor, it's like the Semaphore`s InitialCount and the Semaphore's MaximumCount.

Like this:

t:=TSemaMonitor.create(true,0,4);

When you pass True in the first parameter of the constructor the signal(s) will not be lost even if there is no waiting threads, if it's False the signal(s) will be lost if there is no waiting thread.

As you will notice i have used a scalable and efficient and FIFO fair Lock inside SemaCondVar.pas, i have made ,  but you will notice that this Lock is now portable to the x86 systems and to Linux(x86) , Mac OSX(x86) and Windows(x86), but if you want to port it to other systems than the x86, please change inside SemaCondVar.pas the TALOCK by the TCriticalSection of the SyncObjs unit and it will be portable to other systems than the x86. That's all. So enjoy SemaCondvar and SemaMonitor cause they are fast.

Here is the methods that i have implemented :

TSemaCondvar = class
   public

constructor
Create(m1:TCriticalSection;state1:boolean=false;InitialCount1:longword=0;MaximumCount1:longword=INFINITE);
     destructor Destroy; override;
     function  wait(mstime:longword=INFINITE):boolean;
     procedure signal();overload;
     procedure signal_all();
     procedure signal(nbr:integer);overload;
     function WaitersBlocked:integer;
   end;

TSemaMonitor = class
   public
     constructor
Create(state1:boolean=false;InitialCount1:longword=0;MaximumCount1:longword=INFINITE);
     destructor Destroy; override;
     function  wait(mstime:longword=INFINITE):boolean;
     procedure signal();overload;
     procedure signal_all();
     procedure signal(nbr:integer);overload;
     function WaitersBlocked:integer;
       
   end;

Please take a look a the test.pas Object Pascal demo inside the zipfile, compile and run it...

Language: FPC Pascal v2.2.0+ / Delphi 7+: http://www.freepascal.org/

Operating Systems: Windows, Mac OSX , Linux , Unix...


Required FPC switches: -O3 -Sd -dFPC -dFreePascal

-Sd for delphi mode....

{$DEFINE CPU32} and {$DEFINE Windows32} for 32 bit systems

{$DEFINE CPU64} and {$DEFINE Windows64} for 64 bit systems

{$DEFINE OSX}  for Mac OSX on Delphi XE4 to XE5


Thank you,

Amine Moulay Ramdane.


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