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// Helper macros for dealing with the port::Status datatype.
#ifndef TENSORFLOW_STREAM_EXECUTOR_LIB_STATUS_MACROS_H_
#define TENSORFLOW_STREAM_EXECUTOR_LIB_STATUS_MACROS_H_
// Early-returns the status if it is in error; otherwise, proceeds.
//
// The argument expression is guaranteed to be evaluated exactly once.
#define SE_RETURN_IF_ERROR(__status) \
do { \
auto status = __status; \
if (!status.ok()) { \
return status; \
} \
} while (false)
// Identifier concatenation helper macros.
#define SE_MACRO_CONCAT_INNER(__x, __y) __x##__y
#define SE_MACRO_CONCAT(__x, __y) SE_MACRO_CONCAT_INNER(__x, __y)
// Implementation of SE_ASSIGN_OR_RETURN that uses a unique temporary identifier
// for avoiding collision in the enclosing scope.
#define SE_ASSIGN_OR_RETURN_IMPL(__lhs, __rhs, __name) \
auto __name = (__rhs); \
if (!__name.ok()) { \
return __name.status(); \
} \
__lhs = __name.ConsumeValueOrDie();
// Early-returns the status if it is in error; otherwise, assigns the
// right-hand-side expression to the left-hand-side expression.
//
// The right-hand-side expression is guaranteed to be evaluated exactly once.
#define SE_ASSIGN_OR_RETURN(__lhs, __rhs) \
SE_ASSIGN_OR_RETURN_IMPL(__lhs, __rhs, \
SE_MACRO_CONCAT(__status_or_value, __COUNTER__))
// Logs the status and returns false if it is in error; otherwise, returns true.
//
// The argument expression is guaranteed to be evaluated exactly once.
//
// TODO(leary) remove as many of these as possible with port::Status
// proliferation.
#define SE_RETURN_STATUS_AS_BOOL(__status) \
do { \
auto status = __status; \
if (__status.ok()) { \
return true; \
} \
LOG(ERROR) << status; \
return false; \
} while (false)
#endif // TENSORFLOW_STREAM_EXECUTOR_LIB_STATUS_MACROS_H_
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