Roll forward to cl/338482889

Signed-off-by: Alexey Polyudov <apolyudov@google.com>
Change-Id: I9850950db8bd84f0904ea1a413151887f52098cf

cpp/platform/api/future.h

@@ -1,12 +1,12 @@
 #ifndef PLATFORM_API_FUTURE_H_
 #define PLATFORM_API_FUTURE_H_
 
-#include <cstdint>
-
-#include "platform/exception.h"
+#include "platform/base/exception.h"
+#include "absl/time/clock.h"
 
 namespace location {
 namespace nearby {
+namespace api {
 
 // A Future represents the result of an asynchronous computation.
 //
@@ -14,17 +14,18 @@ namespace nearby {
 template <typename T>
 class Future {
  public:
-  virtual ~Future() {}
+  virtual ~Future() = default;
 
-  virtual ExceptionOr<T>
-  get() = 0;  // throws Exception::INTERRUPTED, Exception::EXECUTION
+  // throws Exception::kInterrupted, Exception::kExecution
+  virtual ExceptionOr<T> Get() = 0;
 
-  // throws Exception::INTERRUPTED, Exception::EXECUTION
-  // throws Exception::TIMEOUT if |timeout_ms| is exceeded while waiting for
+  // throws Exception::kInterrupted, Exception::kExecution
+  // throws Exception::kTimeout if timeout is exceeded while waiting for
   // result.
-  virtual ExceptionOr<T> get(std::int64_t timeout_ms) = 0;
+  virtual ExceptionOr<T> Get(absl::Duration timeout) = 0;
 };
 
+}  // namespace api
 }  // namespace nearby
 }  // namespace location