diff options
Diffstat (limited to 'vendor/github.com/coreos/pkg/dlopen/dlopen_example.go')
-rw-r--r-- | vendor/github.com/coreos/pkg/dlopen/dlopen_example.go | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/vendor/github.com/coreos/pkg/dlopen/dlopen_example.go b/vendor/github.com/coreos/pkg/dlopen/dlopen_example.go new file mode 100644 index 000000000..48a660104 --- /dev/null +++ b/vendor/github.com/coreos/pkg/dlopen/dlopen_example.go @@ -0,0 +1,56 @@ +// Copyright 2015 CoreOS, Inc. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. +// +// +build linux + +package dlopen + +// #include <string.h> +// #include <stdlib.h> +// +// int +// my_strlen(void *f, const char *s) +// { +// size_t (*strlen)(const char *); +// +// strlen = (size_t (*)(const char *))f; +// return strlen(s); +// } +import "C" + +import ( + "fmt" + "unsafe" +) + +func strlen(libs []string, s string) (int, error) { + h, err := GetHandle(libs) + if err != nil { + return -1, fmt.Errorf(`couldn't get a handle to the library: %v`, err) + } + defer h.Close() + + f := "strlen" + cs := C.CString(s) + defer C.free(unsafe.Pointer(cs)) + + strlen, err := h.GetSymbolPointer(f) + if err != nil { + return -1, fmt.Errorf(`couldn't get symbol %q: %v`, f, err) + } + + len := C.my_strlen(strlen, cs) + + return int(len), nil +} |