mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2024-11-22 19:56:39 +00:00
1e7b32490d
This allows for building GoToSocial with [SQLite transpiled to WASM](https://github.com/ncruces/go-sqlite3) and accessed through [Wazero](https://wazero.io/).
64 lines
2.5 KiB
Go
64 lines
2.5 KiB
Go
package experimental
|
|
|
|
import (
|
|
"context"
|
|
|
|
"github.com/tetratelabs/wazero/internal/expctxkeys"
|
|
)
|
|
|
|
// CloseNotifier is a notification hook, invoked when a module is closed.
|
|
//
|
|
// Note: This is experimental progress towards #1197, and likely to change. Do
|
|
// not expose this in shared libraries as it can cause version locks.
|
|
type CloseNotifier interface {
|
|
// CloseNotify is a notification that occurs *before* an api.Module is
|
|
// closed. `exitCode` is zero on success or in the case there was no exit
|
|
// code.
|
|
//
|
|
// Notes:
|
|
// - This does not return an error because the module will be closed
|
|
// unconditionally.
|
|
// - Do not panic from this function as it doing so could cause resource
|
|
// leaks.
|
|
// - While this is only called once per module, if configured for
|
|
// multiple modules, it will be called for each, e.g. on runtime close.
|
|
CloseNotify(ctx context.Context, exitCode uint32)
|
|
}
|
|
|
|
// ^-- Note: This might need to be a part of the listener or become a part of
|
|
// host state implementation. For example, if this is used to implement state
|
|
// cleanup for host modules, possibly something like below would be better, as
|
|
// it could be implemented in a way that allows concurrent module use.
|
|
//
|
|
// // key is like a context key, stateFactory is invoked per instantiate and
|
|
// // is associated with the key (exposed as `Module.State` similar to go
|
|
// // context). Using a key is better than the module name because we can
|
|
// // de-dupe it for host modules that can be instantiated into different
|
|
// // names. Also, you can make the key package private.
|
|
// HostModuleBuilder.WithState(key any, stateFactory func() Cleanup)`
|
|
//
|
|
// Such a design could work to isolate state only needed for wasip1, for
|
|
// example the dirent cache. However, if end users use this for different
|
|
// things, we may need separate designs.
|
|
//
|
|
// In summary, the purpose of this iteration is to identify projects that
|
|
// would use something like this, and then we can figure out which way it
|
|
// should go.
|
|
|
|
// CloseNotifyFunc is a convenience for defining inlining a CloseNotifier.
|
|
type CloseNotifyFunc func(ctx context.Context, exitCode uint32)
|
|
|
|
// CloseNotify implements CloseNotifier.CloseNotify.
|
|
func (f CloseNotifyFunc) CloseNotify(ctx context.Context, exitCode uint32) {
|
|
f(ctx, exitCode)
|
|
}
|
|
|
|
// WithCloseNotifier registers the given CloseNotifier into the given
|
|
// context.Context.
|
|
func WithCloseNotifier(ctx context.Context, notifier CloseNotifier) context.Context {
|
|
if notifier != nil {
|
|
return context.WithValue(ctx, expctxkeys.CloseNotifierKey{}, notifier)
|
|
}
|
|
return ctx
|
|
}
|