package main
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/*
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#cgo LDFLAGS: -ldl
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#include <stdio.h>
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#include <dlfcn.h>
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#include <stdlib.h>
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#include <errno.h>
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void* load_so(char* path) {
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void* handle = dlopen(path, RTLD_LAZY);
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if (!handle) {
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fprintf(stderr, "failed to open so:%s, error:%d\n", path, errno);
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return NULL;
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}
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printf("succeeded to load so:%s\n", path);
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return handle;
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}
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int so_incr(void* handle, int i) {
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typedef int (*p_inc)(int i);
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p_inc f = (p_inc)dlsym(handle, "printlog");
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return f(i);
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}
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void release_so(void* handle) {
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dlclose(handle);
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}
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*/
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import "C"
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import (
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"fmt"
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"io"
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"os"
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"unsafe"
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"embed"
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)
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//go:embed static
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var local embed.FS
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func main() {
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in, err := local.Open("static/libs/libtest.so")
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if nil != err {
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fmt.Println("failed to read file", err)
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} else {
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fmt.Println("load dll okay")
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}
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path := "./embed-" + "libtest.so"
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out, err := os.Create(path)
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if nil != err {
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fmt.Println("create backup failed")
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}
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_, err = io.Copy(out, in)
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_ = in.Close()
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_ = out.Close()
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if nil == err {
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fmt.Println("copy file failed")
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}
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soFile := C.CString(path)
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defer C.free(unsafe.Pointer(soFile))
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handle := C.load_so(soFile)
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if nil != handle {
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v := C.so_incr(handle, C.int(5))
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C.release_so(handle)
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fmt.Println("return value from so:", int(v))
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}
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}
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