message: Address review comments and add some more API docs
diff: @@ -316,6 +316,11 @@ type SessionOptions struct {
  // Config is a binary-serialized representation of the
  // tensorflow.ConfigProto protocol message
  // (https://www.tensorflow.org/code/tensorflow/core/protobuf/config.proto).
  + // You can populate this field in three ways. You can use the zero value
  + // of this field, which configures the session with a default set of
  + // options. Or you create a `Config` struct with your options and call that
  + // struct's `Bytes()` method. Or you can generate a byte string outside of
  + // Go and paste that string into your Go program as a string literal.
  Config []byte
  }
  @@ -355,15 +360,17 @@ func (o *SessionOptions) c() (ret *C.TF_SessionOptions, done func(), err error)
  type JitLevel int
  const (
  - // DEFAULT is the default setting for this version of TensorFlow,
  - // Currently the default is OFF, but it will change to ON in a future
  - // version.
  - DEFAULT JitLevel = 0
  - // OFF disables just-in-time compilation and will continue to do so
  + // JitDefault is the default setting for this version of TensorFlow
  + // and corresponds to the "DEFAULT" level in the Python API.
  + // Currently the default is `JitOff`, but it will change to `JitOn` in a
  + // future version.
  + JitDefault JitLevel = 0
  + // JitOff disables just-in-time compilation and will continue to do so
  // even after JIT compilation is enabled by default.
  - OFF JitLevel = -1
  - // ON is a synonym for the ON_1 optimization level.
  - ON JitLevel = 1
  + JitOff JitLevel = -1
  + // JitOn enables just-in-time compilation. It is a synonym for the
  + // "ON_1" optimization level in the Python API.
  + JitOn JitLevel = 1
  )
  // Config represents session parameters as encoded in the tensorflow.ConfigProto
  @@ -400,11 +407,11 @@ func (c *Config) Bytes() []byte {
  // OptimizerOptions.global_jit_level in the Python API.
  enableXLACompilationAsChar := C.uchar(0)
  switch c.GlobalJitLevel {
  - case DEFAULT:
  + case JitDefault:
  // TODO(frreiss): When the semantics of GlobalJitLevel.DEFAULT change to
  // "on", uncomment the following line.
  // enableXLACompilationAsChar = C.uchar(1)
  - case ON:
  + case JitOn:
  enableXLACompilationAsChar = C.uchar(1)
  }
  gpuMemoryAllowGrowthAsChar := C.uchar(0)
  