mirror of https://github.com/ceph/go-ceph
39 lines
783 B
Go
39 lines
783 B
Go
//go:build no_ptrguard
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// +build no_ptrguard
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package cutil
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// SyncBuffer is a C buffer connected to a data slice
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type SyncBuffer struct {
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data []byte
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cPtr *CPtr
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}
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// NewSyncBuffer creates a C buffer from a data slice and stores it at CPtr
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func NewSyncBuffer(cPtr CPtr, data []byte) *SyncBuffer {
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var v SyncBuffer
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v.data = data
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v.cPtr = (*CPtr)(cPtr)
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*v.cPtr = CBytes(data)
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return &v
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}
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// Release releases the C buffer and nulls its stored pointer
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func (v *SyncBuffer) Release() {
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if v.cPtr != nil {
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Free(*v.cPtr)
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*v.cPtr = nil
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v.cPtr = nil
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}
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v.data = nil
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}
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// Sync asserts that changes in the C buffer are available in the data
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// slice
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func (v *SyncBuffer) Sync() {
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if v.cPtr == nil {
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return
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}
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Memcpy(CPtr(&v.data[0]), CPtr(*v.cPtr), SizeT(len(v.data)))
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}
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