Subversion Repositories bluespec-80211atransmitter

// The MIT License

//

// Copyright (c) 2006 Nirav Dave (ndave@csail.mit.edu)

//

// Permission is hereby granted, free of charge, to any person obtaining a copy

// of this software and associated documentation files (the "Software"), to deal

// in the Software without restriction, including without limitation the rights

// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

// copies of the Software, and to permit persons to whom the Software is

// furnished to do so, subject to the following conditions:

//

// The above copyright notice and this permission notice shall be included in

// all copies or substantial portions of the Software.

//

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

// THE SOFTWARE.

import FIFOF::*;

interface MFIFO#(type alpha);

   method Action enq(alpha x);

   method Action deq();

   method Maybe#(alpha) first();

   method Action clear();

endinterface

module mkMFIFO(MFIFO#(alpha)) provisos(Bits#(alpha, asx));

   FIFOF#(alpha) f <- mkUGFIFOF();

   method Action enq(x) if(f.notFull);

      f.enq(x);

   endmethod

   method Action deq();

     if (f.notEmpty)

        f.deq();

   endmethod

   method Maybe#(alpha) first();

    return (f.notEmpty) ? Just(f.first()) : Nothing;

   endmethod

   method Action clear();

      f.clear();

   endmethod

endmodule