23  */

    23  */

    24 

    24 

    25 #ifndef SHARE_GC_G1_G1FREEIDSET_HPP

    25 #ifndef SHARE_GC_G1_G1FREEIDSET_HPP

    26 #define SHARE_GC_G1_G1FREEIDSET_HPP

    26 #define SHARE_GC_G1_G1FREEIDSET_HPP

    27 

    27 

    29 #include "runtime/semaphore.hpp"

    28 #include "runtime/semaphore.hpp"

    30 #include "utilities/globalDefinitions.hpp"

    29 #include "utilities/globalDefinitions.hpp"

    31 

    30 

    32 // Represents a set of small integer ids, from which elements can be

    31 // Represents a set of small integer ids, from which elements can be

    33 // temporarily allocated for exclusive use.  The ids are in a

    32 // temporarily allocated for exclusive use.  The ids are in a

    34 // contiguous range from 'start' to 'start + size'.  Used to obtain a

    33 // contiguous range from 'start' to 'start + size'.  Used to obtain a

    35 // distinct worker_id value for a mutator thread that doesn't normally

    34 // distinct worker_id value for a mutator thread that doesn't normally

    36 // have such an id.

    35 // have such an id.

    38   Semaphore _sem;

    37   Semaphore _sem;

    39   uint* _next;

    38   uint* _next;

    40   uint _start;

    39   uint _start;

    41   uint _size;

    40   uint _size;

    42   uintx _head_index_mask;

    41   uintx _head_index_mask;