1 /*

     1 /*

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     7  * published by the Free Software Foundation.

    51 

    51 

    52 volatile int ParkEvent::ListLock = 0 ;

    52 volatile int ParkEvent::ListLock = 0 ;

    53 ParkEvent * volatile ParkEvent::FreeList = NULL ;

    53 ParkEvent * volatile ParkEvent::FreeList = NULL ;

    54 

    54 

    55 ParkEvent * ParkEvent::Allocate (Thread * t) {

    55 ParkEvent * ParkEvent::Allocate (Thread * t) {

    57   ParkEvent * ev ;

    56   ParkEvent * ev ;

    58 

    57 

    59   // Start by trying to recycle an existing but unassociated

    58   // Start by trying to recycle an existing but unassociated

    60   // ParkEvent from the global free list.

    59   // ParkEvent from the global free list.

    61   // Using a spin lock since we are part of the mutex impl.

    60   // Using a spin lock since we are part of the mutex impl.

   162     p->FreeNext = FreeList;

   161     p->FreeNext = FreeList;

   163     FreeList = p;

   162     FreeList = p;

   164   }

   163   }

   165   Thread::SpinRelease(&ListLock);

   164   Thread::SpinRelease(&ListLock);

   166 }

   165 }