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1 // Copyright 2012 The Go Authors. All rights reserved.
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2 // Use of this source code is governed by a BSD-style
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3 // license that can be found in the LICENSE file.
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4
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5 // +build !windows
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6
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7 package cgotest
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8
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9 /*
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10 #include <dlfcn.h>
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11 #cgo linux LDFLAGS: -ldl
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12
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13 extern void call4029(void *arg);
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14 */
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15 import "C"
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16
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17 import (
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18 "testing"
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19 )
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20
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21 var callbacks int
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22
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23 //export IMPIsOpaque
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24 func IMPIsOpaque() {
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25 callbacks++
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26 }
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27
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28 //export IMPInitWithFrame
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29 func IMPInitWithFrame() {
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30 callbacks++
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31 }
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32
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33 //export IMPDrawRect
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34 func IMPDrawRect() {
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35 callbacks++
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36 }
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37
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38 //export IMPWindowResize
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39 func IMPWindowResize() {
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40 callbacks++
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41 }
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42
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43 func test4029(t *testing.T) {
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44 loadThySelf(t, "IMPWindowResize")
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45 loadThySelf(t, "IMPDrawRect")
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46 loadThySelf(t, "IMPInitWithFrame")
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47 loadThySelf(t, "IMPIsOpaque")
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48 if callbacks != 4 {
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49 t.Errorf("got %d callbacks, expected 4", callbacks)
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50 }
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51 }
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52
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53 func loadThySelf(t *testing.T, symbol string) {
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54 this_process := C.dlopen(nil, C.RTLD_NOW)
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55 if this_process == nil {
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56 t.Error("dlopen:", C.GoString(C.dlerror()))
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57 return
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58 }
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59 defer C.dlclose(this_process)
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60
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61 symbol_address := C.dlsym(this_process, C.CString(symbol))
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62 if symbol_address == nil {
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63 t.Error("dlsym:", C.GoString(C.dlerror()))
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64 return
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65 }
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66 t.Log(symbol, symbol_address)
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67 C.call4029(symbol_address)
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68 }
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