package ffi

import (
	"unsafe"

	c "github.com/goplus/llgo/runtime/internal/clite"
)

const (
	LLGoPackage = "link: $(pkg-config --libs libffi); -lffi"
	LLGoFiles   = "$(pkg-config --cflags libffi): _wrap/libffi.c"
)

/*
ffi_status
ffi_prep_cif(ffi_cif *cif,
			ffi_abi abi,
			unsigned int nargs,
			ffi_type *rtype,
			ffi_type **atypes);
*/
//go:linkname PrepCif C.ffi_prep_cif
func PrepCif(cif *Cif, abi c.Uint, nargs c.Uint, rtype *Type, atype **Type) c.Uint

/*
ffi_status ffi_prep_cif_var(ffi_cif *cif,
			    ffi_abi abi,
			    unsigned int nfixedargs,
			    unsigned int ntotalargs,
			    ffi_type *rtype,
			    ffi_type **atypes);
*/
//go:linkname PrepCifVar C.ffi_prep_cif_var
func PrepCifVar(cif *Cif, abi c.Uint, nfixedargs c.Uint, ntotalargs c.Uint, rtype *Type, atype **Type) c.Uint

/*
void ffi_call(ffi_cif *cif,
			void (*fn)(void),
			void *rvalue,
			void **avalue);
*/
//go:linkname Call C.ffi_call
func Call(cif *Cif, fn unsafe.Pointer, rvalue unsafe.Pointer, avalue *unsafe.Pointer)

// void *ffi_closure_alloc (size_t size, void **code);
//
//go:linkname ClosureAlloc C.llog_ffi_closure_alloc
func ClosureAlloc(code *unsafe.Pointer) unsafe.Pointer

// void ffi_closure_free (void *);
//
//go:linkname ClosureFree C.ffi_closure_free
func ClosureFree(unsafe.Pointer)

/*
ffi_status
ffi_prep_closure_loc (ffi_closure*,
      ffi_cif *,
      void (*fun)(ffi_cif*,void*,void**,void*),
      void *user_data,
      void *codeloc);
*/

//go:linkname PreClosureLoc C.ffi_prep_closure_loc
func PreClosureLoc(closure unsafe.Pointer, cif *Cif, fn ClosureFunc, userdata unsafe.Pointer, codeloc unsafe.Pointer) c.Uint