github.com/Schaudge/grailbase@v0.0.0-20240223061707-44c758a471c0/gtl/freepool.go.tpl (about)

     1  package PACKAGE
     2  
     3  // A freepool for a single thread. The interface is the same as sync.Pool, but
     4  // it avoids locks and interface conversion overhead.
     5  //
     6  // Example:
     7  //  generate.py -package=foo -prefix=int -DELEM=foo -DMAXSIZE=128
     8  //
     9  //
    10  // Parameters:
    11  //  ELEM: the object to be kept in the freepool
    12  //  MAXSIZE: the maxium number of objects to keep in the freepool
    13  
    14  type ZZPool struct {
    15  	New func() ELEM
    16  	p   []ELEM
    17  }
    18  
    19  func (p *ZZPool) Get() ELEM {
    20  	if len(p.p) == 0 {
    21  		return p.New()
    22  	}
    23  	tmp := p.p[len(p.p)-1]
    24  	p.p = p.p[:len(p.p)-1]
    25  	return tmp
    26  }
    27  
    28  func (p *ZZPool) Put(tmp ELEM) {
    29  	if len(p.p) < MAXSIZE {
    30  		p.p = append(p.p, tmp)
    31  	}
    32  }