Eligibility:

• Cgo struct. Mar 13, 2020 · I am trying to call a C lib from a Go program using CGo. Try adding a definition. Rather than pass the circular queue, pass the data. This lets programmers create Go libraries that can be called from other languages including C, Python, Ruby, Node, and Java (see contributed example for Lua) as done in this repository. {. Using the -buildmode=c-shared build flag, the compiler outputs a standard shared object binary file (. It will then use the C compiler to make the link to your Go project. There are some types that are more difficult to handle. Apr 16, 2015 · Using cgo with the go command. CString(s) // Warning: don't free this if this is stored in the C code. The Go function populates this array and returns. #include "stdio. By default, my tries in Go seems to take 12 bytes as shown here. /*. Imported C functions, types and global variables are available under the virtual "C" package. 我的程序如下: 我在 c 中有结构并且包含一个指向 c 结构数组的指针。. But CGO comes with some helper 4 days ago · I am learning go and cgo and ffi, I have the header file below: #include <stdarg. inet_headers. If the import of "C" is immediately preceded by a comment, that comment, called the preamble, is used as a header when compiling the C parts of the package. h> typedef struct MyStruct3 { const char *const *data; int length; } MyStruct3; void my_struct_3(const struct MyStruct3 *c_data); And this go file The GetValue method will export the pointer to a FFI method and after the values are captures, the program attempts to clear the memory allocated by the C. Note that there must be no blank lines in between the cgo Using cgo with the go command. A. Note that this function uses malloc to create the space for the string, so we need to call the C function free once we are done with the string to prevent memory leaks. golang/go#11925 (comment)). Pointer will detect Go pointer to Go pointer scenarios. Len())) Jun 7, 2023 · こんにちは ハタ です。 このたび Go Conference 2023 Online にて Go/Cgoで映像・音声のリアルタイム処理をやるまでの道のり というタイトルで発表しました 久しぶりの大きなカンファレンスでの登壇だったのでとても緊張しましたが、10周年を迎えた機会に登壇できて光栄です gocon. Closed t0rr3sp3dr0 opened this issue Nov 16, 2019 · 1 comment · May be fixed by zephyr-im/krb5-go#5. To convert a Go string to C, use C. The C code must not store any Go pointers in Go memory, even temporarily. struct_cpu_vminfo type CpuStat C. To use it, you have to read/write the struct as byte array/slice. The Go file will have access to anything appearing in the comment immediately preceding the line import "C", and will be linked against all other cgo comments in other Go files, and all C files included in the build process. 1. struct_hash and Hash. Garbage collection in cgo. Can you use the type definition of a struct even though the struct is non-exported? Feb 16, 2023 · Code generated by cgo will use cgo. //C int mysterious_c_func(const char* values, front int32_t, back int32_t, capacity int32_t); // Go type CircularQueue struct { Values []char //this can't possibly work with interface. A int32. The Go code can then refer to types such as C. go I get mostly sensible output: Inp_hash _Inpcb_list_entry. Jul 22, 2016 · Say: type A struct{. Pointer(ctxt. However, you can use the address of the array to greatly simplify Feb 19, 2016 · I am trying to use CGO to call an optimized C++ CPU-bound implementation of a complex algorithms from golang. } Any function in C is now just a passthrough in Go. unsigned char a; Oct 5, 2015 · Cgo: can't set callback in C-struct from Go. If I have a c++ struct named Foo and a go struct named Foo, I want to pass the go Foo to c++. flag tells the C compiler to add the current Mar 9, 2017 · golang struct with C struct in CGO. WindowsBuild. embed the C code you want to interface as comment (e. But, I get the following error" cgo parameter has Go pointer to Go pointer". h> do has struct with bit fields. As an aside: There's two more mistakes in your C code. 14 backport] #38426. , structs where maximum alignment is 1 byte), you can’t use packed C struct in Go. I want to export some of our Go packages as C++ library and some functions involve self-defined types, including interface. b := buf. Jan 16, 2013 · CGO I am passing a C struct with a pointer to a value to a go function, 31 "cannot take the address of" and "cannot call pointer method on" 4. May 7, 2024 · To access a struct, union, or enum type directly, prefix it with struct_, union_, or enum_, as in C. go package main import ( /* #include "cmain. If I change the definition of Foo to this then it works on my machine (64 bit linux) type Foo struct {. Go code may pass a Go pointer to C provided that the Go memory to which it points does not contain any Go pointers. Aug 7, 2020 · The problem is when I try char * in place of [10]char it's not working. 2 string. C语言中入参大部分情况下是void 类型的指针，需要转换成go语言相应的类型。. The size of any C type T is available as C. I am struck with creating a C struct array in Go. Oct 21, 2019 · CGO is an official builtin feature of Go, it enables the creation of Go packages that reference to C libraries. . h> #include <stdbool. CGO is provided with Go, but you'll need a C compiler like GCC on Ming (for Windows). main. 1 darwin/arm64 What environment are you running Garble on? Mar 16, 2022 · CL 350070 is based on the valid observation that although the type of Windows HANDLE is void*, the values stored in variables of type HANDLE are normally not pointers. 实现. Jan 7, 2024 · Setup Visual Studio Code using RemoteSSH for Linux servers. For example this struct will have a size of 32. Pointer(event)) //Cast Go struct to C struct p := (*C. To use cgo write normal Go code that imports a pseudo-package "C". ; You should use C. 17. char. New replies are no longer allowed. I have C struct like that: typedef struct { void* data; } foo; I want to use CGO to copy it to equivalent go struct type foo struct { data unsafe. struct_cpu_syswait type Vminfo C. h #ifdef __cplusplus extern "C" { #endif #include "structs. CString is a cgo function that takes a go string and returns a pointer to a C char, ie: *C. free to release it. Jump to bottom. cgo exposes a union as a byte array large enough to hold the largest member of the union. To get the address of such a field (which is the only operation you can do with a zero-sized field) you must take the address of the struct and add the size of the struct. struct {. _Ctype_void Notice that the struct when packed takes 10 bytes, 12 otherwise. results that were silently incorrect. dwLinkChoice DWORD. go:5:11: Go type not supported in export: struct {. You signed in with another tab or window. Also, you should never use use anything but a Go code cannot refer to zero-sized fields that occur at the end of non-empty C structs. There function that the syscall pakcage uses to do this isn't exported, but we can easily copy that: // as a parameter instead of []uint16. */. 5 cgo rules I am finding it difficult to figure out how to export functionality from a more complex struct that stores state Sep 14, 2017 · I want to store c pointers in go. go 4. You can access all fields of the C structs and the CGO compiler will even check the types and detect when you access non existing fields. struct bpf_insn {. " But I'm not sure what that entails to my particular code. The simplest way would just be. typedef unsigned char BYTE; #define ACS_CARD_NO_LEN 32 //门禁卡号长度 typedef struct tagNET_DVR_CARD_CFG May 1, 2010 · The size depends on the types it consists of and the order of the fields in the struct (because different padding will be used). The compiler gives errors for such constructs. May 21, 2018 · To read the packed struct as a byte slice we can use one of cgo’s special functions: GoBytes. However, we don't use cgo, but parse C through Ruby, so this is not available for us. 概述. Pointer(&hash)) answered Sep 30, 2016 at 15:11. Fixes #1 Oct 9, 2023 · Using C libraries to use already compiled functions and types in a shared library. This function reads memory handled by C and places it into a Go byte slice. In the calling C function I copy the values out of the C struct and do not store them. WindowsDLLs. h // if C. Apr 15, 2019 · $ go run cgo. Pointer(&b[0]), C. Aug 27, 2023 · system (system) Closed December 27, 2023, 9:37am 5. cons_t. . 0. When passing a pointer to a field in a struct, the Go memory in question is the memory occupied by the What version of Garble and Go are you using? $ garble version v0. xxx with 30 a Go translation. However, with great power comes great responsibility. The C code must preserve this property: it must not store any Go pointers in Go memory, even temporarily. Reserved1 In_addr. A and unsafe point to convert raw data to 0. blk_no uint16. } pkt := packet{opcode: 2, blk_no: 1, data: "testing"} Dec 6, 2019 · For the C side to access the struct I would provide helper routines (I provide one example) on the go side that would take a pointer to the struct as an argument. Bytes() rc := C. C strings are char*. The function signature must not include neither Go struct nor Go interface nor Sep 22, 2021 · Your code needs 2 fixes: C char only represents a single character/byte - not a string. Dec 4, 2013 · That part of the blog article just seems to be saying that memory allocated in C won't be freed by Go's GC, which is not what I'm asking about: rather than asking about the lifetime of the Foo structure, I'm wondering what the lifetime of the channel I've stored a pointer to. 在C语言中，我提供了一个initialize函数 (带两个参数:指向变量的指针，变量内部 Mar 15, 2022 · I agree with @yuki2006 's assessment - "Go: Fill struct" command is a no longer useful addition and removal makes more sense than reimplementing it. so) exposing Go functions as a C-style APIs. To lead with an example, here’s a Go package that provides two functions - Random and Seed - that wrap C’s random and srandom functions. package main. B int32. Feb 24, 2018 · C. Below is the code snippet. You can directly use it in main. As Go doesn’t support packed struct (e. Install GO and dependent modules. Reload to refresh your session. CGO will use the "C" package where all C functions and variables are accessibles. h file is very different from the one you linked. May 7, 2024 · Handle provides a way to pass values that contain Go pointers (pointers to memory allocated by Go) between Go and C without breaking the cgo pointer passing rules. 2. b int64. We would like to show you a description here but the site won’t allow us. 3 int. package rand. size_t, variables such as C. Oct 15, 2014 · raw_data := data[2:len(data)] // this will copy rest of the raw data in to raw_data byte stream. The type is struct PROCESS not PROCESS: struct PROCESS. While constructing a []byte stream from a struct, you can use following method. Unless -fms-extensions is used, the unnamed field must be a structure or union definition without a tag (for example, ‘ struct { int a; }; ’). Dec 14, 2023 · cgo. May 1, 2020 · It is possible to create structs with fields that contain only a type without the field name. But with the go 1. Press Ctrl + Shift + X to open the list of available extensions and search for "C" in the search bar: Go ahead and install this extension. Instead we take the offset of the zero size array field, which does return the desired value. As stated in the cgo documentation, As Go doesn't have support for C's union type in the general case, C's union types are represented as a Go byte array with the same length. For example, what if the N struct is declared as: type N struct { Next unsafe. Windows. type Cons struct {. #cgo CFLAGS is a directive used in Go's cgo tool to specify compiler flags for the C compiler when building the Go program. I tried doing this: //bind. We should fix this in the 1. In Go, we prefer safe types. str := C. free, add stdlib. malloc'ed memory? Jul 30, 2015 · Go code using cgo can get the real size through the C. The same goes for the other errors, except this is a case of importing the incorrect header, or the incorrect version of that header. The Go compiler can no longer check the types here, so it's up to you to ensure that the size and type of everything is identical between C. go_func. This topic was automatically closed 90 days after the last reply. Jun 5, 2019 · I have a struct like so: typedef struct st_MASK_SETTINGS { uint32_t foo : 1; uint32_t bar : 7; } MASK_SETTINGS Now through cgo I would like to access foo - but cannot find any documentation how to do so. May 7, 2019 · This will print the following: === Bypass Detection ===. The same works for all other types. type packet struct {. h> #include <stdint. This means that two structs with the same fields can have different size. int(buf. go语言相应的结构体，也需要转换成C语言的void 指针。. Sep 30, 2016 · 2. \main. A Handle is an integer value that can represent any Go value. run (Interestingly enough, it seems to work fine on Asahi Linux on an M1 Mac, so the issue must be specifically MacOS related). } I propose the following rules for passing pointers between Go and C, while preserving this invariant: Go code may pass a Go pointer to C provided that the Go memory to which it points does not contain any Go pointers. I have a struct in C lib with some callbacks defined inside it. gopherbot mentioned this issue on Apr 13, 2020. Russ Cox edited this page Dec 15, 2023 · 18 revisions Well known struct tags. That supposes you have an instance of Project (in ' yourProject ') The article JSON and Go will give more details on how to retrieve the values from a JSON struct. char bypassed the detection. opcode uint16. 14 branch. h". TestStruct is not defined in the C code. h) contains this struct, and use C. Mar 17, 2011 · Given a Go source file written with some special features, cgo outputs Go and C files that can be combined into a single Go package. foo complains has no field or method. Printf("%+v\n", yourProject) From the fmt package: when printing structs, the plus flag ( %+v) adds field names. run && dlv exec debug. Apr 11, 2014 · You can use C structs in Go (though if the struct holds a union it gets a bit more complex). clibvlc_event_t)(unsafe. h>. As you've demonstrated, the contents of this array hold the contents of the union and using it is a matter of pointer conversion. in cgoType (), use the map that was just created to lookup the name of the struct and Mar 30, 2023 · The #cgo directive specifies the CFLAGS needed to compile the C code, and the C code is compiled and linked with the Go code at build time. Feb 28, 2016 · If you want to use your first approach, you need to create the slice outside the function call arguments, and avoid the temporarily allocated slice header or the outer structure in the arguments, so the cgo checks don't see it as a pointer stored in Go. 标签 c arrays pointers go cgo. go. If the import of "C" is immediately preceded by a comment, that comment, called the preamble, is used as a header when compiling the C Mar 16, 2017 · I have issue when using cgo with c struct array. #include <foo. Apr 26, 2016 · It is even easy enough to export data from custom Go types to C by defining a C struct and translating the Go type to it, to be used in the exported functions, since you are allocating C memory to do it. free (be sure to include stdlib. 0 $ go version go version go1. Importing the Struct in Your Main File. test func NewTest() *Test { return &Test{1,2} } The problem is that outside of the package, I can't access the fields in the C-struct Jul 27, 2017 · I am defining the struct in go as follows: type myStruct struct {. } However I would say that is a recipe for trouble - make your Go and C code use the same structure with. The order in which C bitfields appear in memory. import "C". h> #include <stdlib. // Go string to C string // The C string is allocated in the C heap using malloc. type Foo _Ctype_Foo. Feb 17, 2024 · The “C” package provides a number of convinences for converting between Go strings and C strings, handling the difference in null-termination. type SPC_LINK struct {. Why doesn't CGo May 20, 2018 · 3. a int64. a bool. dwLink [{size of the union}]byte. someString [32]C. putchar. Copying the variable isn't an option for things like channels (for . struct_cpu_sysinfo type Syswait C. The C struct contains an array of values (using pointer arithmetic). CGo provides a powerful tool for Go developers to interoperate with C, leveraging the speed and extensive libraries of C within Go's environment. I was able to pass a GO int from GO code to C and access the GO int in C and also was able to modify, but am facing issues in passing a GO structure to C. Jul 20, 2022 · 1. My program as follow: I have struct in c and contain a pointer to a c struct array. sizeof_struct_ construct (cf. type1 b *C. 6 cgo has new rules. struct_hash)(unsafe. Aug 13, 2014 · Suppose I have a C-struct that looks like: typedef struct { uint32_t fizz; uint64_t buzz; } test And in CGo, I wrap the C-struct and create new methods as follows: package test type Test C. === Trigger Detection ===. my_struct_t in Go. g. I'm writing some go code that will take the output of a sysctl and parse the output. If -fms-extensions is used, the field may also be a definition with a tag such as ‘ struct foo { int a; }; ’, a reference to a previously defined May 18, 2021 · For example, struct A below will only be created and destroyed in the Go land and only be accessed through method1. Unfortunately, the above code doesn't compile: go build -o main. 4. May 10, 2022 · To access a struct type directly, prefix it with struct_, as in C. typedef signed int i32_t; typedef struct s_t {. cmd/cgo: types regression for anonymous structs [1. Pointer(&VLCEvent{})) EDIT: Add example struct. go and main. Maybe you should try this. In C, I provide a initialize function (take two parameter: the pointer to the variable, the length of the array inside the variable) to malloc the memory of the variable. It's essential to understand the intricacies, overheads, and potential pitfalls when using CGo in your applications. Golang - CGO Rule 1 – “Go code may pass a Go pointer to C provided the Go memory to which it points does not contain any Go pointers. In order to use it we The basics. To print the name of the fields in a struct: fmt. func Parse(s string) Cons {. h to your includes. 7. Here you have to give cgo some help, by creating Go level versions of the embedded struct types before the main struct type: type Sysinfo C. type perm struct{ a *C. But the cgo document https Oct 10, 2016 · For windows you can generally use the syscall UTF16 functions, but here we first need to convert the *uint16 to a []uint16 slice, then decode that slice to a utf8 string. Mar 14, 2024 · There is a C struct like this: 、、、 struct dcmi_chip_info { unsigned char chip_type[MAX_CHIP_NAME_LEN]; unsigned char chip_name[MAX_CHIP_NAME_LEN]; unsigned char chip_ver[MAX_CHIP_NAME_LEN]; unsigned int aicore_cnt; }; 、、、 and a C func like this: DCMIDLLEXPORT int dcmi_get_device_chip_info(int card_id, int device_id, struct dcmi_chip_info *chip_info); Then I want to use CGO to get Dec 29, 2014 · In the case of C. 3. } I have a method in the dll: DLLINTERFACE HRESULT __stdcall GetMyStruct (myStruct* ptrMyStruct); This method will populate the someString field of myStruct. go Hello world! Sizeof Packed_Struct: 10 Sizeof UnPacked_Struct: 12 Sizeof GoStruct : 12 meh type: main. Make sure you're using the correct Jun 23, 2017 · then, the compatible struct in go will be: type VLCEvent struct { Type int32 Pad_cgo_0 [4]byte Obj *byte U [16]byte } //Cast C struct to Go struct ev := (*VLCEvent)(unsafe. wchar_t. If a Go source file imports "C", it is using cgo. i32_t i; } sv_t, *sp_t; int Add(sv_t v, sp_t p); I am experimenting with cgo, and wanted to use c++ with cgo. Apr 20, 2016 · Learn how to handle C structs in Go code using cgo, a library for calling C functions from Go. A Handle can be passed through C and back to Go, and Go code can use the Handle to retrieve the original Go value. streams)); // I Nov 16, 2019 · Missing struct fields when using CGO on macOS #35640. Incomplete to mark an incomplete C type. go: When I run go tool cgo -godefs inet_headers. c C. package main /* struct Point { char x; char y; }; */ import "C" //export Nov 15, 2017 · Am trying to send a GO structure from from GO code to a C code and access the content of GO structure in C. Jun 22, 2023 · Getting Help. go are in the same package (main), you don't need to import the User struct explicitly. In your case that is 64 bits which are 8 bytes, [8]byte. struct_stat. h>) prior to the import. golang struct array to cgo struct array. cgo中go结构体与void*的转换. } And then convert raw data byte stream to it using encoding/binary . I'm trying to do this in pure go, but with a struct definition generated by cgo. stdout, or functions such as C. Contribute to llgoer/cgo-struct-array development by creating an account on GitHub. Add CGOFILES=foo. Here is example code taken from above article and modified with char * . Now to be able to use CGO we need to additionally install C module in Visual Studio Code. func Random() int {. If the import of "C" is immediately preceded by a comment, that comment, called the preamble, is used as a header when compiling the C Nov 11, 2013 · Note that int is 64 bit in go, but is quite likely to be 32 bit in C. #include <stdlib. Checking on a random ubuntu system, the lirc_client. jp 今回… cgo 使用 c struct 数组并在 go 中赋值. Apr 24, 2018 · As you noticed, the problem is in the following code: func (ctxt *Context) StreamsGet(i uintptr) *Stream { streams := (**Stream)(unsafe. Only using unsafe. [source] These rules are checked during the runtime, and if violated program crashes. I checked out the tutorials/docs about how to use cgo and export go structs, but I have not found instructions about how to handle interfaces, which contain cgo: Basic Steps. If you have a struct my_struct_t in C you can just use is with C. I have the following C files that makes up the C lib. All groups and messages Mar 8, 2018 · I trying to call WindowsAPI with syscall from golang package (try not to use cgo) but I'm facing uintptr I have no idea how to access the data that uintptr have its address Here it code I'm doing Jan 13, 2010 · This is an incompatible change to how cgo handles anonymous structs. CString(). go to your Makefile. hpp" void bindCgo(Foo bar); #ifdef __cplusplus } #endif CGO的C虚拟包提供了以下一组函数，用于Go语言和C语言之间数组和字符串的双向转换：. You switched accounts on another tab or window. Even if your program passes compilation, it won’t do what you want. h" */ "C" "fmt" ) type test struct { first_name string Aug 6, 2015 · The approach I took is this: after all the Decls are added to the Package in Record () (in main. But using this method, I should maintain two different-interrelated structs. the_function(unsafe. In this specific case, the -I. The snippet below creates a struct Person which has two anonymous fields string and int. type2 } The fields a and b in perm are pointers allocated by C. Jan 11, 2024 · package main type User struct { Name string Age int } In this example, we have a struct User with two fields: Name and Age. A simplified version of the code can be seen in the below: We would like to show you a description here but the site won’t allow us. // It is the caller's responsibility to arrange for it to be // freed, such as by calling C. #pragma pack(1) typedef struct{. See two solutions: using a wrapper struct or unmarshalling the data. free is needed To use cgo write normal Go code that imports a pseudo-package "C". is implementation dependent, so in some cases the cgo tool produced. Basically, it will pass a string into c++ function and get a string back. Note that this allocates C memory for the resulting string, and must be manually free’d. Using *C. # command-line-arguments. data string. CString to allocate a C string from Go, and C. start a new . Problem that Go treat this fields as * [0]byte array type and I can't set it to pointer: Sample of problem code: One possible solution - write a C setter, something like this: but it looks ugly: I can't pass cb_func as argument to setter Jan 23, 2017 · cgo: use typedef struct in preamble. I am calling the method like so (this is working correctly, I think, I have not been able to Jun 3, 2017 · 1230. Is there a Go-ish way to pack this struct so it uses only 10 bytes? If xxx is a type, cgo replaces C. When passing a pointer to a field in a struct, the Go May 11, 2016 · Starting from Go 1. You can use the unsafe package to cast the data. Cgo translates C types into equivalent unexported Go types. 我在将 cgo 与 c struct 数组一起使用时遇到问题。. cgo command. As this is created in Go is this garbage collected? You can't do CGO_ENABLED=1 CGO_CXXFLAGS=-g CGO_CFLAGS=-g go build -ldflags=-linkmode=internal -o debug. dll -buildmode=c-shared . struct_cpu_stat Cgo will then be able to generate a proper Go struct with embedded Go structs in CpuStat. C arithmetic types translate to precisely-sized Go 31 arithmetic types. You'll also need to use cgo's C strings rather than Go's built-in string in the struct. Pointer Buf [1024]byte } and the programmer guarantee that Next pointer will be pointing to C. represented in Go. The FreeMemory method accepts a pointer and the length of the allocated array. malloc. JimB. Maybe I should use as type parameter the pointer to the C structure and write instead: The rule seems to forbid passing a *N to C function, but I agree the rule need more clarification as to what constitute a Go pointer. These kinds of fields are called anonymous fields. Getting double free or corruption (out) when using free in cgo, golang. Get the struct from C to Golang. Since models. Pointer } but I get panic: runtime error: cgo Jul 24, 2018 · Solution is quite simple. panic: runtime error: cgo argument has Go pointer to Go pointer. At the moment it is possible to disable checks using GODEBUG=cgocheck=0 environment variable. There is no workaround for people using C headers that use the construct that changed incompatibly. printf(val) does not work because printf can not be used to directly print a struct. Another method is to use Cgo, just import the C language head file ( . WhyGo. go ), call a function which looks at each of the exported functions and uses the Decls to create a map to store some information about struct parameters & results. I found this post about doing it. This allows us to pass strings to C code. That will give VS Code users consistent experience across all languages. Since Go's GC really wants to know whether something is a pointer or not, telling it that values of type HANDLE are not pointers seems like the right move in general. sizeof_T, as in C. WindowsCrossCompiling. In real life, some system api like ebpf <linux/bpf. You have to flatten what you provide to the C code. Dec 18, 2020 · C struct bitfields into Go struct fields, even if their size can be. Struct Alignment Issues. A C function may be declared in the Go file with a parameter type of the special name _GoString_. c [1024]byte. sizeof_struct_stat. Chash := *(*C. go source file. Aug 30, 2023 · Conclusion. A C struct translates to a Go struct, field by 32 field; unrepresentable fields are replaced with opaque byte arrays. Naive v := ms. In C, (unlike C++), the struct keyword does not declare a type-name that can be used on its own; it needs qualification with the struct keyword. Shuning_Lin (Shuning Lin) June 22, 2023, 9:12am 1. But Python code does need to know the handle/pointer to instances of struct A such that when it passes this handle/pointer to a Go function, the Go function knows to convert it to a Go pointer and calls its method. 1 type Person struct {. You signed out in another tab or window. Dec 16, 2019 · Using your example (with a struct tag), here are various ways you can pass C struct arguments from Go to a C Add function: variable, pointer, and unsafe pointer. Closed Dec 24, 2019 · Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Talent Build your employer brand Feb 2, 2017 · I have a C function that creates a C struct and passes it to a Go function. I'm not sure how this conversion works with [10]char and not with char * . jc yp ha qc rq jz na do aw pl