.

vendor/github.com/bytedance/sonic/internal/rt/pool.go

@@ -0,0 +1,31 @@
+package rt
+
+import (
+	"unsafe"
+)
+
+type SlicePool struct {
+	pool  unsafe.Pointer
+	len   int
+	index int
+	typ   uintptr
+}
+
+func NewPool(typ *GoType, size int) SlicePool {
+	return SlicePool{pool: newarray(typ, size), len: size, typ: uintptr(unsafe.Pointer(typ))}
+}
+
+func (self *SlicePool) GetSlice(size int) unsafe.Pointer {
+	// pool is full, fallback to normal alloc
+	if size > self.Remain() {
+		return newarray(AsGoType(self.typ), size)
+	}
+
+	ptr := PtrAdd(self.pool, uintptr(self.index)* AsGoType(self.typ).Size)
+	self.index += size
+	return ptr
+}
+
+func (self *SlicePool) Remain() int {
+	return self.len - self.index
+}