mirror of
https://github.com/mautrix/signal.git
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77 lines
2.1 KiB
Go
77 lines
2.1 KiB
Go
// mautrix-signal - A Matrix-signal puppeting bridge.
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// Copyright (C) 2023 Sumner Evans
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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package libsignalgo
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/*
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#include "./libsignal-ffi.h"
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*/
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import "C"
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import (
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"context"
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"errors"
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"unsafe"
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gopointer "github.com/mattn/go-pointer"
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)
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type WrappedStore[T any] struct {
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Store T
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Ctx *CallbackContext
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}
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type CallbackContext struct {
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Error error
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Ctx context.Context
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Unrefs []unsafe.Pointer
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}
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func NewCallbackContext(ctx context.Context) *CallbackContext {
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if ctx == nil {
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panic(errors.New("nil context passed to NewCallbackContext"))
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}
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return &CallbackContext{Ctx: ctx}
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}
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func (ctx *CallbackContext) Unref() {
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for _, ptr := range ctx.Unrefs {
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gopointer.Unref(ptr)
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}
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}
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func wrapStore[T any](ctx *CallbackContext, store T) unsafe.Pointer {
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wrappedStore := gopointer.Save(&WrappedStore[T]{Store: store, Ctx: ctx})
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ctx.Unrefs = append(ctx.Unrefs, wrappedStore)
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return wrappedStore
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}
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func wrapStoreCallbackCustomReturn[T any](storeCtx unsafe.Pointer, callback func(store T, ctx context.Context) (int, error)) C.int {
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wrap := gopointer.Restore(storeCtx).(*WrappedStore[T])
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retVal, err := callback(wrap.Store, wrap.Ctx.Ctx)
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if err != nil {
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wrap.Ctx.Error = err
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}
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return C.int(retVal)
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}
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func wrapStoreCallback[T any](storeCtx unsafe.Pointer, callback func(store T, ctx context.Context) error) C.int {
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wrap := gopointer.Restore(storeCtx).(*WrappedStore[T])
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if err := callback(wrap.Store, wrap.Ctx.Ctx); err != nil {
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wrap.Ctx.Error = err
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return -1
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}
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return 0
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}
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