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Fail at compile time if default executor tries to use non-default device

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This commit is contained in:
Eugene Zhulenev 2020-02-06 22:43:24 +00:00
parent 3fda850c46
commit f584bd9b30
1 changed files with 8 additions and 5 deletions
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13
unsupported/Eigen/CXX11/src/Tensor/TensorExecutor.h
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@ -83,11 +83,14 @@ class TensorExecutor {
typedef typename Expression::Index StorageIndex; typedef typename Expression::Index StorageIndex;
// Including `unsupported/Eigen/CXX11/Tensor` in different translation units // Including `unsupported/Eigen/CXX11/Tensor` in different translation units
// with/without `EIGEN_USE_THREADS` is an ODR violation. If this template // with/without `EIGEN_USE_THREADS` or `EIGEN_USE_GPU` is a potential ODR
// is instantiated with a thread pool device, it means that this header // violation. If this template is instantiated with a non-default device, it
// file was included without defining `EIGEN_USE_THREADS`. // means that this header file was included without defining
static_assert(!std::is_same<Device, ThreadPoolDevice>::value, // `EIGEN_USE_THREADS`, `EIGEN_USE_GPU` or `EIGEN_USE_SYCL`.
"You are missing `#define EIGEN_USE_THREADS`"); static_assert(std::is_same<Device, DefaultDevice>::value,
"Default executor instantiated with non-default device. "
"You must #define EIGEN_USE_THREADS, EIGEN_USE_GPU or "
"EIGEN_USE_SYCL before including Eigen headers.");
EIGEN_DEVICE_FUNC EIGEN_DEVICE_FUNC
static EIGEN_STRONG_INLINE void run(const Expression& expr, static EIGEN_STRONG_INLINE void run(const Expression& expr,