From 1e7b32490dfdccddd04f46d4b0416b48d749d51b Mon Sep 17 00:00:00 2001
From: kim <89579420+NyaaaWhatsUpDoc@users.noreply.github.com>
Date: Mon, 27 May 2024 15:46:15 +0000
Subject: [experiment] add alternative wasm sqlite3 implementation available
 via build-tag (#2863)

This allows for building GoToSocial with [SQLite transpiled to WASM](https://github.com/ncruces/go-sqlite3) and accessed through [Wazero](https://wazero.io/).
---
 .../github.com/ncruces/go-sqlite3/vfs/registry.go  | 48 ++++++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 vendor/github.com/ncruces/go-sqlite3/vfs/registry.go

(limited to 'vendor/github.com/ncruces/go-sqlite3/vfs/registry.go')

diff --git a/vendor/github.com/ncruces/go-sqlite3/vfs/registry.go b/vendor/github.com/ncruces/go-sqlite3/vfs/registry.go
new file mode 100644
index 000000000..42a2106fb
--- /dev/null
+++ b/vendor/github.com/ncruces/go-sqlite3/vfs/registry.go
@@ -0,0 +1,48 @@
+package vfs
+
+import "sync"
+
+var (
+	// +checklocks:vfsRegistryMtx
+	vfsRegistry    map[string]VFS
+	vfsRegistryMtx sync.RWMutex
+)
+
+// Find returns a VFS given its name.
+// If there is no match, nil is returned.
+// If name is empty, the default VFS is returned.
+//
+// https://sqlite.org/c3ref/vfs_find.html
+func Find(name string) VFS {
+	if name == "" || name == "os" {
+		return vfsOS{}
+	}
+	vfsRegistryMtx.RLock()
+	defer vfsRegistryMtx.RUnlock()
+	return vfsRegistry[name]
+}
+
+// Register registers a VFS.
+// Empty and "os" are reserved names.
+//
+// https://sqlite.org/c3ref/vfs_find.html
+func Register(name string, vfs VFS) {
+	if name == "" || name == "os" {
+		return
+	}
+	vfsRegistryMtx.Lock()
+	defer vfsRegistryMtx.Unlock()
+	if vfsRegistry == nil {
+		vfsRegistry = map[string]VFS{}
+	}
+	vfsRegistry[name] = vfs
+}
+
+// Unregister unregisters a VFS.
+//
+// https://sqlite.org/c3ref/vfs_find.html
+func Unregister(name string) {
+	vfsRegistryMtx.Lock()
+	defer vfsRegistryMtx.Unlock()
+	delete(vfsRegistry, name)
+}
-- 
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