4600df55ca
The gobind and gomobile bind tools have historically overlapped: gobind outputs generated bindings, and gomobile bind will generate bindings before building them. However, the gobind bindings were never used for building and thus allowed to not be complete. To simplify version control, debugging, instrumentation and build system flexibility, this CL upgrades the gobind tool to be the canonical binding generator and change gomobile bind to use gobind instead of its own generator code. This greatly simplifies gomobile bind, but also paves the way to skip gomobile bind entirely. For example: $ gobind -outdir=$GOPATH golang.org/x/mobile/example/bind/hello $ GOOS=android GOARCH=arm64 CC=<ndk-toolchain>/bin/clang go build -buildmode=c-shared -o libgobind.so gobind $ ls libgobind.* libgobind.h libgobind.so The same applies to iOS, although the go build command line is more involved. By skipping gomobile it is possible to freely customize the Android or iOS SDK level or any other flags not supported by gomobile bind. By checking in the generated source code, the cost of supporting gomobile in a custom build system is also decreased. Change-Id: I59c14a77d625ac1377c23b3213672e0d83a48c85 Reviewed-on: https://go-review.googlesource.com/99316 Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
92 lines
2.2 KiB
Plaintext
92 lines
2.2 KiB
Plaintext
// Copyright 2016 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package main
|
|
|
|
// Go support functions for Objective-C. Note that this
|
|
// file is copied into and compiled with the generated
|
|
// bindings.
|
|
|
|
/*
|
|
#cgo CFLAGS: -x objective-c -fobjc-arc -fmodules -fblocks -Werror
|
|
#cgo LDFLAGS: -framework Foundation
|
|
|
|
#include <stdint.h>
|
|
#include <stdlib.h>
|
|
#include "seq.h"
|
|
*/
|
|
import "C"
|
|
|
|
import (
|
|
"unsafe"
|
|
|
|
"golang.org/x/mobile/bind/seq"
|
|
)
|
|
|
|
// DestroyRef is called by Objective-C to inform Go it is done with a reference.
|
|
//export DestroyRef
|
|
func DestroyRef(refnum C.int32_t) {
|
|
seq.Delete(int32(refnum))
|
|
}
|
|
|
|
// encodeString copies a Go string and returns it as a nstring.
|
|
func encodeString(s string) C.nstring {
|
|
n := C.int(len(s))
|
|
if n == 0 {
|
|
return C.nstring{}
|
|
}
|
|
ptr := C.malloc(C.size_t(n))
|
|
if ptr == nil {
|
|
panic("encodeString: malloc failed")
|
|
}
|
|
copy((*[1<<31 - 1]byte)(ptr)[:n], s)
|
|
return C.nstring{ptr: ptr, len: n}
|
|
}
|
|
|
|
// decodeString converts a nstring to a Go string. The
|
|
// data in str is freed after use.
|
|
func decodeString(str C.nstring) string {
|
|
if str.ptr == nil {
|
|
return ""
|
|
}
|
|
s := C.GoStringN((*C.char)(str.ptr), str.len)
|
|
C.free(str.ptr)
|
|
return s
|
|
}
|
|
|
|
// fromSlice converts a slice to a nbyteslice.
|
|
// If cpy is set, a malloc'ed copy of the data is returned.
|
|
func fromSlice(s []byte, cpy bool) C.nbyteslice {
|
|
if s == nil || len(s) == 0 {
|
|
return C.nbyteslice{}
|
|
}
|
|
ptr, n := unsafe.Pointer(&s[0]), C.int(len(s))
|
|
if cpy {
|
|
nptr := C.malloc(C.size_t(n))
|
|
if nptr == nil {
|
|
panic("fromSlice: malloc failed")
|
|
}
|
|
copy((*[1<<31 - 1]byte)(nptr)[:n], (*[1<<31 - 1]byte)(ptr)[:n])
|
|
ptr = nptr
|
|
}
|
|
return C.nbyteslice{ptr: ptr, len: n}
|
|
}
|
|
|
|
// toSlice takes a nbyteslice and returns a byte slice with the data. If cpy is
|
|
// set, the slice contains a copy of the data. If not, the generated Go code
|
|
// calls releaseByteSlice after use.
|
|
func toSlice(s C.nbyteslice, cpy bool) []byte {
|
|
if s.ptr == nil || s.len == 0 {
|
|
return nil
|
|
}
|
|
var b []byte
|
|
if cpy {
|
|
b = C.GoBytes(s.ptr, C.int(s.len))
|
|
C.free(s.ptr)
|
|
} else {
|
|
b = (*[1<<31 - 1]byte)(unsafe.Pointer(s.ptr))[:s.len:s.len]
|
|
}
|
|
return b
|
|
}
|