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| 1 // Copyright 2013 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 // This file contains test cases for cgo with function pointer variables. |
| 6 |
| 7 package cgotest |
| 8 |
| 9 /* |
| 10 typedef int (*intFunc) (); |
| 11 |
| 12 int |
| 13 bridge_int_func(intFunc f) |
| 14 { |
| 15 return f(); |
| 16 } |
| 17 |
| 18 int fortytwo() |
| 19 { |
| 20 return 42; |
| 21 } |
| 22 |
| 23 */ |
| 24 import "C" |
| 25 import "testing" |
| 26 |
| 27 func callBridge(f C.intFunc) int { |
| 28 return int(C.bridge_int_func(f)) |
| 29 } |
| 30 |
| 31 func callCBridge(f C.intFunc) C.int { |
| 32 return C.bridge_int_func(f) |
| 33 } |
| 34 |
| 35 func testFpVar(t *testing.T) { |
| 36 const expected = 42 |
| 37 f := C.intFunc(C.fortytwo) |
| 38 res1 := C.bridge_int_func(f) |
| 39 if r1 := int(res1); r1 != expected { |
| 40 t.Errorf("got %d, want %d", r1, expected) |
| 41 } |
| 42 res2 := callCBridge(f) |
| 43 if r2 := int(res2); r2 != expected { |
| 44 t.Errorf("got %d, want %d", r2, expected) |
| 45 } |
| 46 r3 := callBridge(f) |
| 47 if r3 != expected { |
| 48 t.Errorf("got %d, want %d", r3, expected) |
| 49 } |
| 50 } |
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