From b9faf92148c7e6432ff0411783f444b7779fa36a Mon Sep 17 00:00:00 2001
From: Jonas Knobloch <jonas.knobloch@t-online.de>
Date: Mon, 6 Apr 2026 22:59:50 +0200
Subject: Handle environment initialization on package level

---
 gpt2/cmd/gpt2/main.go | 16 ++++++++++------
 gpt2/model.go         | 10 +---------
 gpt2/model_test.go    | 14 ++++++++++++++
 gpt2/onnx.go          | 13 +++++++++++++
 4 files changed, 38 insertions(+), 15 deletions(-)
 create mode 100644 gpt2/onnx.go

(limited to 'gpt2')

diff --git a/gpt2/cmd/gpt2/main.go b/gpt2/cmd/gpt2/main.go
index 663bdd8..d854519 100644
--- a/gpt2/cmd/gpt2/main.go
+++ b/gpt2/cmd/gpt2/main.go
@@ -10,12 +10,20 @@ import (
 )
 
 func main() {
+	if err := gpt2.InitializeEnvironment(); err != nil {
+		log.Fatal(err)
+	}
+
 	prompt := []int64{464, 2068, 7586}
 
 	generate(prompt) // [-13.483142 -11.277906]
 	score(prompt)    // [-13.48314 -11.277912]
 
 	_ = prompt
+
+	if err := gpt2.DestroyEnvironment(); err != nil {
+		log.Fatal(err)
+	}
 }
 
 func generate(prompt []int64) {
@@ -35,9 +43,7 @@ func generate(prompt []int64) {
 
 	fmt.Println(selectLogProbs(logits[:len(logits)-1], prompt[1:]))
 
-	if err := m.Destroy(); err != nil {
-		log.Fatal(err)
-	}
+	m.Destroy()
 }
 
 func score(prompt []int64) {
@@ -55,9 +61,7 @@ func score(prompt []int64) {
 
 	fmt.Println(logProbs)
 
-	if err := m.Destroy(); err != nil {
-		log.Fatal(err)
-	}
+	m.Destroy()
 }
 
 func selectLogProbs(logits [][]float32, tokens []int64) []float32 {
diff --git a/gpt2/model.go b/gpt2/model.go
index f492c56..d0d1c2f 100644
--- a/gpt2/model.go
+++ b/gpt2/model.go
@@ -60,12 +60,6 @@ func IntraOpNumThreads() int {
 }
 
 func (m *Model) Init() error {
-	ort.SetSharedLibraryPath(SharedLibraryPath())
-
-	if err := ort.InitializeEnvironment(); err != nil {
-		return err
-	}
-
 	m.allocator = NewAllocator(m.config, m.withCache, m.withLogits, m.withLogProbs)
 
 	var options *ort.SessionOptions
@@ -99,10 +93,8 @@ func (m *Model) Init() error {
 	return nil
 }
 
-func (m *Model) Destroy() error {
+func (m *Model) Destroy() {
 	m.allocator.Destroy()
-
-	return ort.DestroyEnvironment()
 }
 
 func (m *Model) Generate(prompt []int64, steps int64, logits *[][]float32) ([]int64, error) {
diff --git a/gpt2/model_test.go b/gpt2/model_test.go
index d197ccc..0072254 100644
--- a/gpt2/model_test.go
+++ b/gpt2/model_test.go
@@ -9,6 +9,20 @@ import (
 	"testing"
 )
 
+func TestMain(m *testing.M) {
+	if err := InitializeEnvironment(); err != nil {
+		log.Fatal(err)
+	}
+
+	exit := m.Run()
+
+	if err := DestroyEnvironment(); err != nil {
+		log.Fatal(err)
+	}
+
+	os.Exit(exit)
+}
+
 func fromModel() []float32 {
 	prompt := []int64{464, 2068, 7586, 21831, 18045, 625, 262, 16931, 3290}
 
diff --git a/gpt2/onnx.go b/gpt2/onnx.go
new file mode 100644
index 0000000..0da2ae2
--- /dev/null
+++ b/gpt2/onnx.go
@@ -0,0 +1,13 @@
+package gpt2
+
+import ort "github.com/yalue/onnxruntime_go"
+
+func InitializeEnvironment() error {
+	ort.SetSharedLibraryPath(SharedLibraryPath())
+
+	return ort.InitializeEnvironment()
+}
+
+func DestroyEnvironment() error {
+	return ort.DestroyEnvironment()
+}
-- 
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