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package libs
// #include "sass/context.h"
//
import "C"
import (
"fmt"
"sync"
)
// SassCallback defines the callback libsass eventually executes in
// sprite_sass
type SassCallback func(v interface{}, csv UnionSassValue, rsv *UnionSassValue) error
// Cookie is used for passing context information to libsass. Cookie is
// passed to custom handlers when libsass executes them through the go
// bridge.
type Cookie struct {
Sign string
Fn SassCallback
Ctx interface{}
}
// gate gobridge, it has some unknown race conditions
var gobridgeMu sync.Mutex
// GoBridge is exported to C for linking libsass to Go. This function
// adheres to the interface provided by libsass.
//
//export GoBridge
func GoBridge(cargs UnionSassValue, cidx C.int) UnionSassValue {
// Recover the Cookie struct passed in
idx := int(cidx)
ck, ok := globalFuncs.Get(idx).(Cookie)
if !ok {
fmt.Printf("failed to resolve Cookie %d\n", idx)
return MakeNil()
}
// ck := *(*Cookie)(ptr)
var usv UnionSassValue
err := ck.Fn(ck.Ctx, cargs, &usv)
_ = err
return usv
}
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