49 lines
1000 B
Go
49 lines
1000 B
Go
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package vfs
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import "sync"
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var (
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// +checklocks:vfsRegistryMtx
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vfsRegistry map[string]VFS
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vfsRegistryMtx sync.RWMutex
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)
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// Find returns a VFS given its name.
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// If there is no match, nil is returned.
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// If name is empty, the default VFS is returned.
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//
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// https://sqlite.org/c3ref/vfs_find.html
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func Find(name string) VFS {
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if name == "" || name == "os" {
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return vfsOS{}
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}
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vfsRegistryMtx.RLock()
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defer vfsRegistryMtx.RUnlock()
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return vfsRegistry[name]
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}
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// Register registers a VFS.
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// Empty and "os" are reserved names.
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//
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// https://sqlite.org/c3ref/vfs_find.html
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func Register(name string, vfs VFS) {
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if name == "" || name == "os" {
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return
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}
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vfsRegistryMtx.Lock()
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defer vfsRegistryMtx.Unlock()
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if vfsRegistry == nil {
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vfsRegistry = map[string]VFS{}
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}
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vfsRegistry[name] = vfs
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}
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// Unregister unregisters a VFS.
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//
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// https://sqlite.org/c3ref/vfs_find.html
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func Unregister(name string) {
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vfsRegistryMtx.Lock()
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defer vfsRegistryMtx.Unlock()
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delete(vfsRegistry, name)
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}
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