WebJan 5, 2024 · package main // #include import "C" import "unsafe" // StringSlice is a wrapper arround GoStringSlice to make it usable in C. //export StringSlice func StringSlice () **C.char { x := GoStringSlice () ret := C.malloc (C.size_t (len (x)) * C.size_t (unsafe.Sizeof (uintptr (0)))) // convert to usable format so we are able to fill it with data pRet … WebOct 10, 2024 · In C GoSlice is just typedef struct { void *data; GoInt len; GoInt cap; } GoSlice; and in your example you pass just uninitialized pointer to GoSlice: GoSlice *segs, *tags; //here char* err; err = Seg ("hahahhaha", segs, tags); So it's just pure luck that you can r/w at this memory location.
Go Slices - W3Schools
WebApr 27, 2024 · Neither C nor Go would ever implicitly allocate new memory, copy the associated array, and pass a different value to a function. Go is pass by value in all cases, and here the value is the slice header, nothing else. – JimB. Apr 27, 2024 at 1:00. @JimB "Neither C nor Go would ever implicitly allocate new memory" Could you let me know if … WebI'm using the standard cgo approach combined with pybind11 but not able to get it working. I'm leveraging this demo which works on its own but not when trying to link the go code. Equally I'm able to call the go code from C but not from Python. UPDATE sunfed chicken countdown
Does passing a slice to golang from c do a memory copy?
WebIntroduction. Go is meant to be a practical language. Integration with existing software, infrastructure and protocols necessary. Ability to use existing C code is crucial for … WebA common way of declaring a slice is like this: myslice := []int{} The code above declares an empty slice of 0 length and 0 capacity. To initialize the slice during declaration, use this: … WebIn the CGO section of the Golang Wiki, there is an articlethat explains how to create a Go slice backed by a C array. In the article there is a code snipped that details the conversion and most important statement in that snippet is the following: slice := (*[1 << 30]C.YourType)(unsafe.Pointer(theCArray))[:length:length] sunfern olympia