1 files changed, 57 insertions, 0 deletions
diff --git a/vendor/github.com/libgit2/git2go/handles.go b/vendor/github.com/libgit2/git2go/handles.go
new file mode 100644
index 000000000..d27d3c353
--- /dev/null
+++ b/vendor/github.com/libgit2/git2go/handles.go
@@ -0,0 +1,57 @@
+package git
+
+/*
+#include <stdlib.h>
+*/
+import "C"
+import (
+	"fmt"
+	"sync"
+	"unsafe"
+)
+
+type HandleList struct {
+	sync.RWMutex
+	// stores the Go pointers
+	handles map[unsafe.Pointer]interface{}
+}
+
+func NewHandleList() *HandleList {
+	return &HandleList{
+		handles: make(map[unsafe.Pointer]interface{}),
+	}
+}
+
+// Track adds the given pointer to the list of pointers to track and
+// returns a pointer value which can be passed to C as an opaque
+// pointer.
+func (v *HandleList) Track(pointer interface{}) unsafe.Pointer {
+	handle := C.malloc(1)
+
+	v.Lock()
+	v.handles[handle] = pointer
+	v.Unlock()
+
+	return handle
+}
+
+// Untrack stops tracking the pointer given by the handle
+func (v *HandleList) Untrack(handle unsafe.Pointer) {
+	v.Lock()
+	delete(v.handles, handle)
+	C.free(handle)
+	v.Unlock()
+}
+
+// Get retrieves the pointer from the given handle
+func (v *HandleList) Get(handle unsafe.Pointer) interface{} {
+	v.RLock()
+	defer v.RUnlock()
+
+	ptr, ok := v.handles[handle]
+	if !ok {
+		panic(fmt.Sprintf("invalid pointer handle: %p", handle))
+	}
+
+	return ptr
+}