mirror of
https://github.com/yalue/onnxruntime_go.git
synced 2025-09-27 03:35:58 +08:00
11b449bb38
- The training API has been deprecated by onnxruntime itself, and it will be much easier to remove it rather than deprecate it. - The training API wrapper functions have been replaced by stubs that return errors in legacy_types.go. - The README mentions the old version required for the training API. - The Scalar type has been promoted to onnxruntime_go.go, and a test has been added for it.
104 lines
3.3 KiB
Go
104 lines
3.3 KiB
Go
//go:build windows
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package onnxruntime_go
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// This file includes the Windows-specific code for loading the onnxruntime
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// library and setting up the environment.
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import (
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"fmt"
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"syscall"
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"unicode/utf16"
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"unicode/utf8"
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"unsafe"
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)
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// #include "onnxruntime_wrapper.h"
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import "C"
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// This will contain the handle to the onnxruntime dll if it has been loaded
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// successfully.
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var libraryHandle syscall.Handle
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func platformCleanup() error {
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e := syscall.FreeLibrary(libraryHandle)
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libraryHandle = 0
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return e
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}
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func platformInitializeEnvironment() error {
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if onnxSharedLibraryPath == "" {
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onnxSharedLibraryPath = "onnxruntime.dll"
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}
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handle, e := syscall.LoadLibrary(onnxSharedLibraryPath)
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if e != nil {
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return fmt.Errorf("Error loading ONNX shared library \"%s\": %w",
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onnxSharedLibraryPath, e)
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}
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getApiBaseProc, e := syscall.GetProcAddress(handle, "OrtGetApiBase")
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if e != nil {
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syscall.FreeLibrary(handle)
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return fmt.Errorf("Error finding OrtGetApiBase function in %s: %w",
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onnxSharedLibraryPath, e)
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}
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ortApiBase, _, e := syscall.SyscallN(uintptr(getApiBaseProc), 0)
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if ortApiBase == 0 {
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syscall.FreeLibrary(handle)
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if e != nil {
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return fmt.Errorf("Error calling OrtGetApiBase: %w", e)
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} else {
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return fmt.Errorf("Error calling OrtGetApiBase")
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}
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}
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tmp := C.SetAPIFromBase((*C.OrtApiBase)(unsafe.Pointer(ortApiBase)))
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if tmp != 0 {
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syscall.FreeLibrary(handle)
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return fmt.Errorf("Error setting ORT API base: %d", tmp)
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}
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libraryHandle = handle
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return nil
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}
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// Converts the given string to a UTF-16 string, pointed to by a raw
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// *C.char. Note that we actually keep ORTCHAR_T defined to char even
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// on Windows, so do _not_ index into this string from Cgo code and expect to
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// get correct characters! Instead, this should only be used to obtain pointers
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// that are passed to onnxruntime windows DLL functions expecting ORTCHAR_T*
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// args. This is required because we undefine _WIN32 for cgo compatibility when
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// including onnxruntime_c_api.h, but still interact with a DLL that was
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// compiled assuming _WIN32 was defined.
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//
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// The pointer returned by this function must still be freed using C.free when
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// no longer needed. This will return an error if the given string contains
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// non-UTF8 characters.
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func createOrtCharString(str string) (*C.char, error) {
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src := []uint8(str)
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// Assumed common case: the utf16 buffer contains one uint16 per utf8 byte
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// plus one more for the required null terminator in the C buffer.
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dst := make([]uint16, 0, len(src)+1)
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// Convert UTF-8 to UTF-16 by reading each subsequent rune from src and
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// appending it as UTF-16 to dst.
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for len(src) > 0 {
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r, size := utf8.DecodeRune(src)
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if r == utf8.RuneError {
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return nil, fmt.Errorf("Invalid UTF-8 rune found in \"%s\"", str)
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}
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src = src[size:]
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dst = utf16.AppendRune(dst, r)
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}
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// Make sure dst contains the null terminator. Additionally this will cause
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// us to return an empty string if the original string was empty.
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dst = append(dst, 0)
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// Finally, we need to copy dst into a C array for compatibility with
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// C.CString.
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toReturn := C.calloc(C.size_t(len(dst)), 2)
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if toReturn == nil {
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return nil, fmt.Errorf("Error allocating buffer for the utf16 string")
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}
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C.memcpy(toReturn, unsafe.Pointer(&(dst[0])), C.size_t(len(dst))*2)
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return (*C.char)(toReturn), nil
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}
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