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feat: add version flag for the plugin spec
Signed-off-by: peefy <[email protected]>
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// Copyright 2016 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. | ||
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//go:build linux || darwin | ||
// +build linux darwin | ||
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// Package dlopen provides some convenience functions to dlopen a library and | ||
// get its symbols. | ||
package dlopen | ||
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// #cgo LDFLAGS: -ldl | ||
// #include <stdlib.h> | ||
// #include <dlfcn.h> | ||
import "C" | ||
import ( | ||
"errors" | ||
"fmt" | ||
"unsafe" | ||
) | ||
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var ErrSoNotFound = errors.New("unable to open a handle to the library") | ||
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// LibHandle represents an open handle to a library (.so) | ||
type LibHandle struct { | ||
Handle unsafe.Pointer | ||
Libname string | ||
} | ||
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// GetHandle tries to get a handle to a library (.so), attempting to access it | ||
// by the names specified in libs and returning the first that is successfully | ||
// opened. Callers are responsible for closing the handler. If no library can | ||
// be successfully opened, an error is returned. | ||
func GetHandle(libs []string) (*LibHandle, error) { | ||
for _, name := range libs { | ||
libname := C.CString(name) | ||
defer C.free(unsafe.Pointer(libname)) | ||
handle := C.dlopen(libname, C.RTLD_LAZY) | ||
if handle != nil { | ||
h := &LibHandle{ | ||
Handle: handle, | ||
Libname: name, | ||
} | ||
return h, nil | ||
} | ||
} | ||
return nil, ErrSoNotFound | ||
} | ||
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// GetSymbolPointer takes a symbol name and returns a pointer to the symbol. | ||
func (l *LibHandle) GetSymbolPointer(symbol string) (unsafe.Pointer, error) { | ||
sym := C.CString(symbol) | ||
defer C.free(unsafe.Pointer(sym)) | ||
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C.dlerror() | ||
p := C.dlsym(l.Handle, sym) | ||
e := C.dlerror() | ||
if e != nil { | ||
return nil, fmt.Errorf("error resolving symbol %q: %v", symbol, errors.New(C.GoString(e))) | ||
} | ||
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return p, nil | ||
} | ||
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// Close closes a LibHandle. | ||
func (l *LibHandle) Close() error { | ||
C.dlerror() | ||
C.dlclose(l.Handle) | ||
e := C.dlerror() | ||
if e != nil { | ||
return fmt.Errorf("error closing %v: %v", l.Libname, errors.New(C.GoString(e))) | ||
} | ||
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return nil | ||
} |
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//go:build windows | ||
// +build windows | ||
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// Package dlopen provides some convenience functions to dlopen a library and | ||
// get its symbols. | ||
package dlopen | ||
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import ( | ||
"errors" | ||
"unsafe" | ||
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"syscall" | ||
) | ||
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var ErrSoNotFound = errors.New("unable to open a handle to the library") | ||
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// LibHandle represents an open handle to a library (.so) | ||
type LibHandle struct { | ||
Handle unsafe.Pointer | ||
Libname string | ||
} | ||
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func GetHandle(libs []string) (*LibHandle, error) { | ||
if len(libs) == 0 { | ||
return nil, ErrSoNotFound | ||
} | ||
name := libs[0] | ||
dll, err := syscall.LoadDLL(name) | ||
if err != nil { | ||
return nil, err | ||
} | ||
return LibHandle{ | ||
Handle: dll, | ||
Libname: name, | ||
}, nil | ||
} | ||
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// GetSymbolPointer takes a symbol name and returns a pointer to the symbol. | ||
func (l *LibHandle) GetSymbolPointer(symbol string) (unsafe.Pointer, error) { | ||
return syscall.GetProcAddress(l.Handle, symbol) | ||
Check failure on line 40 in pkg/3rdparty/dlopen/dlopen_windws.go GitHub Actions / build-and-test
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} | ||
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// Close closes a LibHandle. | ||
func (l *LibHandle) Close() error { | ||
return syscall.FreeLibrary(l.Handle) | ||
} |
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