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Source file misc/cgo/life/life.go

Documentation: misc/cgo/life

  // skip
  
  // Copyright 2010 The Go Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style
  // license that can be found in the LICENSE file.
  
  package life
  
  // #include "life.h"
  import "C"
  
  import "unsafe"
  
  func Run(gen, x, y int, a []int32) {
  	n := make([]int32, x*y)
  	for i := 0; i < gen; i++ {
  		C.Step(C.int(x), C.int(y), (*C.int)(unsafe.Pointer(&a[0])), (*C.int)(unsafe.Pointer(&n[0])))
  		copy(a, n)
  	}
  }
  
  // Keep the channels visible from Go.
  var chans [4]chan bool
  
  //export GoStart
  // Double return value is just for testing.
  func GoStart(i, xdim, ydim, xstart, xend, ystart, yend C.int, a *C.int, n *C.int) (int, int) {
  	c := make(chan bool, int(C.MYCONST))
  	go func() {
  		C.DoStep(xdim, ydim, xstart, xend, ystart, yend, a, n)
  		c <- true
  	}()
  	chans[i] = c
  	return int(i), int(i + 100)
  }
  
  //export GoWait
  func GoWait(i C.int) {
  	<-chans[i]
  	chans[i] = nil
  }
  

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