github.com/akaros/go-akaros@v0.0.0-20181004170632-85005d477eab/misc/cgo/test/issue4029.go (about)

     1  // Copyright 2012 The Go Authors.  All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  // +build !windows
     6  
     7  package cgotest
     8  
     9  /*
    10  #include <dlfcn.h>
    11  #cgo linux LDFLAGS: -ldl
    12  #cgo akaros LDFLAGS: -ldl
    13  */
    14  import "C"
    15  
    16  import (
    17  	"fmt"
    18  	"testing"
    19  )
    20  
    21  //export IMPIsOpaque
    22  func IMPIsOpaque() {
    23  	fmt.Println("isOpaque")
    24  }
    25  
    26  //export IMPInitWithFrame
    27  func IMPInitWithFrame() {
    28  	fmt.Println("IInitWithFrame")
    29  }
    30  
    31  //export IMPDrawRect
    32  func IMPDrawRect() {
    33  	fmt.Println("drawRect:")
    34  }
    35  
    36  //export IMPWindowResize
    37  func IMPWindowResize() {
    38  	fmt.Println("windowDidResize:")
    39  }
    40  
    41  func test4029(t *testing.T) {
    42  	loadThySelf(t, "IMPWindowResize")
    43  	loadThySelf(t, "IMPDrawRect")
    44  	loadThySelf(t, "IMPInitWithFrame")
    45  	loadThySelf(t, "IMPIsOpaque")
    46  }
    47  
    48  func loadThySelf(t *testing.T, symbol string) {
    49  	this_process := C.dlopen(nil, C.RTLD_NOW)
    50  	if this_process == nil {
    51  		t.Error("dlopen:", C.GoString(C.dlerror()))
    52  		return
    53  	}
    54  	defer C.dlclose(this_process)
    55  
    56  	symbol_address := C.dlsym(this_process, C.CString(symbol))
    57  	if symbol_address == nil {
    58  		t.Error("dlsym:", C.GoString(C.dlerror()))
    59  		return
    60  	}
    61  	t.Log(symbol, symbol_address)
    62  }