Project structure refactor:

- Change package name general_server to gateway
- Changing the structure of directories and packages
- Adding vendor to the project

vendor/github.com/yuin/gopher-lua/alloc.go

@@ -0,0 +1,79 @@
+package lua
+
+import (
+	"reflect"
+	"unsafe"
+)
+
+// iface is an internal representation of the go-interface.
+type iface struct {
+	itab unsafe.Pointer
+	word unsafe.Pointer
+}
+
+const preloadLimit LNumber = 128
+
+var _fv float64
+var _uv uintptr
+
+var preloads [int(preloadLimit)]LValue
+
+func init() {
+	for i := 0; i < int(preloadLimit); i++ {
+		preloads[i] = LNumber(i)
+	}
+}
+
+// allocator is a fast bulk memory allocator for the LValue.
+type allocator struct {
+	size    int
+	fptrs   []float64
+	fheader *reflect.SliceHeader
+
+	scratchValue  LValue
+	scratchValueP *iface
+}
+
+func newAllocator(size int) *allocator {
+	al := &allocator{
+		size:    size,
+		fptrs:   make([]float64, 0, size),
+		fheader: nil,
+	}
+	al.fheader = (*reflect.SliceHeader)(unsafe.Pointer(&al.fptrs))
+	al.scratchValue = LNumber(0)
+	al.scratchValueP = (*iface)(unsafe.Pointer(&al.scratchValue))
+
+	return al
+}
+
+// LNumber2I takes a number value and returns an interface LValue representing the same number.
+// Converting an LNumber to a LValue naively, by doing:
+// `var val LValue = myLNumber`
+// will result in an individual heap alloc of 8 bytes for the float value. LNumber2I amortizes the cost and memory
+// overhead of these allocs by allocating blocks of floats instead.
+// The downside of this is that all of the floats on a given block have to become eligible for gc before the block
+// as a whole can be gc-ed.
+func (al *allocator) LNumber2I(v LNumber) LValue {
+	// first check for shared preloaded numbers
+	if v >= 0 && v < preloadLimit && float64(v) == float64(int64(v)) {
+		return preloads[int(v)]
+	}
+
+	// check if we need a new alloc page
+	if cap(al.fptrs) == len(al.fptrs) {
+		al.fptrs = make([]float64, 0, al.size)
+		al.fheader = (*reflect.SliceHeader)(unsafe.Pointer(&al.fptrs))
+	}
+
+	// alloc a new float, and store our value into it
+	al.fptrs = append(al.fptrs, float64(v))
+	fptr := &al.fptrs[len(al.fptrs)-1]
+
+	// hack our scratch LValue to point to our allocated value
+	// this scratch lvalue is copied when this function returns meaning the scratch value can be reused
+	// on the next call
+	al.scratchValueP.word = unsafe.Pointer(fptr)
+
+	return al.scratchValue
+}