add gomobile test2

gomobile/gomobile.go

@@ -0,0 +1,114 @@
+// Package libwallet exports Decred wallet functionalities for mobile platforms.
+// This package is designed to be compiled with gomobile for iOS and Android.
+//
+// Build examples:
+//
+//	gomobile bind -target=android -androidapi=23 -o ./build/libwallet.aar ./gomobile
+//	gomobile bind -target=ios -o ./build/Libwallet.xcframework ./gomobile
+package libwallet
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"sync"
+
+	"github.com/decred/libwallet/assetlog"
+	"github.com/decred/libwallet/dcr"
+	"github.com/decred/slog"
+)
+
+// -----------------------------------------------------------------------------
+// Global variables (shared across files in this package) x
+// -----------------------------------------------------------------------------
+
+var (
+	mainCtx       context.Context
+	cancelMainCtx context.CancelFunc
+	wg            sync.WaitGroup
+
+	logBackend *parentLogger
+	logMtx     sync.RWMutex
+	log        slog.Logger
+
+	// walletsMtx protects wallets and initialized.
+	walletsMtx  sync.RWMutex
+	wallets     = make(map[string]*wallet)
+	initialized bool
+)
+
+// -----------------------------------------------------------------------------
+// Core Functions
+// -----------------------------------------------------------------------------
+
+// Initialize initializes the libwallet mobile library.
+func Initialize(logDir, logLvl string) (string, error) {
+	walletsMtx.Lock()
+	defer walletsMtx.Unlock()
+	if initialized {
+		return "", errors.New("duplicate initialization")
+	}
+
+	lvl, ok := slog.LevelFromString(logLvl)
+	if !ok {
+		return "", fmt.Errorf("unknown log level %q", logLvl)
+	}
+
+	if logDir != "" {
+		logSpinner, err := assetlog.NewRotator(logDir, "dcrwallet.log")
+		if err != nil {
+			return "", fmt.Errorf("error initializing log rotator: %v", err)
+		}
+
+		logBackend = newParentLogger(logSpinner, lvl)
+		err = dcr.InitGlobalLogging(logDir, logBackend, lvl)
+		if err != nil {
+			return "", fmt.Errorf("error initializing logger for external pkgs: %v", err)
+		}
+	} else {
+		logBackend = newParentStdOutLogger(lvl)
+	}
+
+	logMtx.Lock()
+	log = logBackend.SubLogger("APP")
+	logMtx.Unlock()
+
+	mainCtx, cancelMainCtx = context.WithCancel(context.Background())
+
+	initialized = true
+	return "libwallet mobile initialized", nil
+}
+
+// Shutdown shuts down the libwallet mobile library.
+func Shutdown() (string, error) {
+	walletsMtx.Lock()
+	defer walletsMtx.Unlock()
+	if !initialized {
+		return "", errors.New("not initialized")
+	}
+
+	logMtx.RLock()
+	log.Debug("libwallet mobile shutting down")
+	logMtx.RUnlock()
+
+	for _, w := range wallets {
+		if err := w.CloseWallet(); err != nil {
+			w.log.Errorf("close wallet error: %v", err)
+		}
+	}
+	wallets = make(map[string]*wallet)
+
+	// Stop all remaining background processes and wait for them to stop.
+	cancelMainCtx()
+	wg.Wait()
+
+	// Close the logger backend as the last step.
+	logMtx.Lock()
+	log.Debug("libwallet mobile shutdown")
+	_ = logBackend.Close()
+	logBackend = nil
+	logMtx.Unlock()
+
+	initialized = false
+	return "libwallet mobile shutdown", nil
+}