libgo/misc/cgo/test/basic.go

   1 // Copyright 2010 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 // Basic test cases for cgo.
   6
   7 package cgotest
   8
   9 /*
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include <sys/stat.h>
  13 #include <errno.h>
  14
  15 #define SHIFT(x, y)  ((x)<<(y))
  16 #define KILO SHIFT(1, 10)
  17 #define UINT32VAL 0xc008427bU
  18
  19 enum E {
  20         Enum1 = 1,
  21         Enum2 = 2,
  22 };
  23
  24 typedef unsigned char cgo_uuid_t[20];
  25
  26 void uuid_generate(cgo_uuid_t x) {
  27         x[0] = 0;
  28 }
  29
  30 struct S {
  31         int x;
  32 };
  33
  34 extern enum E myConstFunc(struct S* const ctx, int const id, struct S **const filter);
  35
  36 enum E myConstFunc(struct S *const ctx, int const id, struct S **const filter) { return 0; }
  37
  38 // issue 1222
  39 typedef union {
  40         long align;
  41 } xxpthread_mutex_t;
  42
  43 struct ibv_async_event {
  44         union {
  45                 int x;
  46         } element;
  47 };
  48
  49 struct ibv_context {
  50         xxpthread_mutex_t mutex;
  51 };
  52
  53 int add(int x, int y) {
  54         return x+y;
  55 };
  56 */
  57 import "C"
  58 import (
  59         "runtime"
  60         "syscall"
  61         "testing"
  62         "unsafe"
  63 )
  64
  65 const EINVAL = C.EINVAL /* test #define */
  66
  67 var KILO = C.KILO
  68
  69 func uuidgen() {
  70         var uuid C.cgo_uuid_t
  71         C.uuid_generate(&uuid[0])
  72 }
  73
  74 func Strtol(s string, base int) (int, error) {
  75         p := C.CString(s)
  76         n, err := C.strtol(p, nil, C.int(base))
  77         C.free(unsafe.Pointer(p))
  78         return int(n), err
  79 }
  80
  81 func Atol(s string) int {
  82         p := C.CString(s)
  83         n := C.atol(p)
  84         C.free(unsafe.Pointer(p))
  85         return int(n)
  86 }
  87
  88 func testConst(t *testing.T) {
  89         C.myConstFunc(nil, 0, nil)
  90 }
  91
  92 func testEnum(t *testing.T) {
  93         if C.Enum1 != 1 || C.Enum2 != 2 {
  94                 t.Error("bad enum", C.Enum1, C.Enum2)
  95         }
  96 }
  97
  98 func testAtol(t *testing.T) {
  99         l := Atol("123")
 100         if l != 123 {
 101                 t.Error("Atol 123: ", l)
 102         }
 103 }
 104
 105 func testErrno(t *testing.T) {
 106         p := C.CString("no-such-file")
 107         m := C.CString("r")
 108         f, err := C.fopen(p, m)
 109         C.free(unsafe.Pointer(p))
 110         C.free(unsafe.Pointer(m))
 111         if err == nil {
 112                 C.fclose(f)
 113                 t.Fatalf("C.fopen: should fail")
 114         }
 115         if err != syscall.ENOENT {
 116                 t.Fatalf("C.fopen: unexpected error: %v", err)
 117         }
 118 }
 119
 120 func testMultipleAssign(t *testing.T) {
 121         p := C.CString("234")
 122         n, m := C.strtol(p, nil, 345), C.strtol(p, nil, 10)
 123         if runtime.GOOS == "openbsd" {
 124                 // Bug in OpenBSD strtol(3) - base > 36 succeeds.
 125                 if (n != 0 && n != 239089) || m != 234 {
 126                         t.Fatal("Strtol x2: ", n, m)
 127                 }
 128         } else if n != 0 || m != 234 {
 129                 t.Fatal("Strtol x2: ", n, m)
 130         }
 131         C.free(unsafe.Pointer(p))
 132 }
 133
 134 var (
 135         cuint  = (C.uint)(0)
 136         culong C.ulong
 137         cchar  C.char
 138 )
 139
 140 type Context struct {
 141         ctx *C.struct_ibv_context
 142 }
 143
 144 func benchCgoCall(b *testing.B) {
 145         const x = C.int(2)
 146         const y = C.int(3)
 147         for i := 0; i < b.N; i++ {
 148                 C.add(x, y)
 149         }
 150 }
 151
 152 // Issue 2470.
 153 func testUnsignedInt(t *testing.T) {
 154         a := (int64)(C.UINT32VAL)
 155         b := (int64)(0xc008427b)
 156         if a != b {
 157                 t.Errorf("Incorrect unsigned int - got %x, want %x", a, b)
 158         }
 159 }
 160
 161 // Static (build-time) test that syntax traversal visits all operands of s[i:j:k].
 162 func sliceOperands(array [2000]int) {
 163         _ = array[C.KILO:C.KILO:C.KILO] // no type error
 164 }
 165
 166 // set in cgo_thread_lock.go init
 167 var testThreadLockFunc = func(*testing.T) {}