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Source file misc/cgo/life/life.go

     1	// skip
     2	
     3	// Copyright 2010 The Go Authors.  All rights reserved.
     4	// Use of this source code is governed by a BSD-style
     5	// license that can be found in the LICENSE file.
     6	
     7	package life
     8	
     9	// #include "life.h"
    10	import "C"
    11	
    12	import "unsafe"
    13	
    14	func Run(gen, x, y int, a []int32) {
    15		n := make([]int32, x*y)
    16		for i := 0; i < gen; i++ {
    17			C.Step(C.int(x), C.int(y), (*C.int)(unsafe.Pointer(&a[0])), (*C.int)(unsafe.Pointer(&n[0])))
    18			copy(a, n)
    19		}
    20	}
    21	
    22	// Keep the channels visible from Go.
    23	var chans [4]chan bool
    24	
    25	//export GoStart
    26	// Double return value is just for testing.
    27	func GoStart(i, xdim, ydim, xstart, xend, ystart, yend C.int, a *C.int, n *C.int) (int, int) {
    28		c := make(chan bool, int(C.MYCONST))
    29		go func() {
    30			C.DoStep(xdim, ydim, xstart, xend, ystart, yend, a, n)
    31			c <- true
    32		}()
    33		chans[i] = c
    34		return int(i), int(i + 100)
    35	}
    36	
    37	//export GoWait
    38	func GoWait(i C.int) {
    39		<-chans[i]
    40		chans[i] = nil
    41	}
    42	

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