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#Class tensorflow::EnvWrapper
An implementation of Env that forwards all calls to another Env .
May be useful to clients who wish to override just part of the functionality of another Env .
##Member Summary
* [tensorflow::EnvWrapper::EnvWrapper](#tensorflow_EnvWrapper_EnvWrapper)
* Initializes an EnvWrapper that delegates all calls to *t.
* [virtual tensorflow::EnvWrapper::~EnvWrapper](#virtual_tensorflow_EnvWrapper_EnvWrapper)
* [Env* tensorflow::EnvWrapper::target](#Env_tensorflow_EnvWrapper_target)
* Returns the target to which this Env forwards all calls.
* [Status tensorflow::EnvWrapper::NewRandomAccessFile](#Status_tensorflow_EnvWrapper_NewRandomAccessFile)
* Creates a brand new random access read-only file with the specified name.
* [Status tensorflow::EnvWrapper::NewWritableFile](#Status_tensorflow_EnvWrapper_NewWritableFile)
* Creates an object that writes to a new file with the specified name.
* [Status tensorflow::EnvWrapper::NewAppendableFile](#Status_tensorflow_EnvWrapper_NewAppendableFile)
* Creates an object that either appends to an existing file, or writes to a new file (if the file does not exist to begin with).
* [bool tensorflow::EnvWrapper::FileExists](#bool_tensorflow_EnvWrapper_FileExists)
* Returns true iff the named file exists.
* [Status tensorflow::EnvWrapper::GetChildren](#Status_tensorflow_EnvWrapper_GetChildren)
* Stores in *result the names of the children of the specified directory. The names are relative to "dir".
* [Status tensorflow::EnvWrapper::DeleteFile](#Status_tensorflow_EnvWrapper_DeleteFile)
* Deletes the named file.
* [Status tensorflow::EnvWrapper::CreateDir](#Status_tensorflow_EnvWrapper_CreateDir)
* Creates the specified directory.
* [Status tensorflow::EnvWrapper::DeleteDir](#Status_tensorflow_EnvWrapper_DeleteDir)
* Deletes the specified directory.
* [Status tensorflow::EnvWrapper::GetFileSize](#Status_tensorflow_EnvWrapper_GetFileSize)
* Stores the size of fname in *file_size.
* [Status tensorflow::EnvWrapper::RenameFile](#Status_tensorflow_EnvWrapper_RenameFile)
* Renames file src to target. If target already exists, it will be replaced.
* [uint64 tensorflow::EnvWrapper::NowMicros](#uint64_tensorflow_EnvWrapper_NowMicros)
* Returns the number of micro-seconds since some fixed point in time. Only useful for computing deltas of time.
* [void tensorflow::EnvWrapper::SleepForMicroseconds](#void_tensorflow_EnvWrapper_SleepForMicroseconds)
* Sleeps/delays the thread for the prescribed number of micro-seconds.
* [Thread* tensorflow::EnvWrapper::StartThread](#Thread_tensorflow_EnvWrapper_StartThread)
* Returns a new thread that is running fn() and is identified (for debugging/performance-analysis) by "name".
##Member Details
#### tensorflow::EnvWrapper::EnvWrapper(Env *t) {#tensorflow_EnvWrapper_EnvWrapper}
Initializes an EnvWrapper that delegates all calls to *t.
#### virtual tensorflow::EnvWrapper::~EnvWrapper() {#virtual_tensorflow_EnvWrapper_EnvWrapper}
#### Env* tensorflow::EnvWrapper::target() const {#Env_tensorflow_EnvWrapper_target}
Returns the target to which this Env forwards all calls.
#### Status tensorflow::EnvWrapper::NewRandomAccessFile(const string &f, RandomAccessFile **r) override {#Status_tensorflow_EnvWrapper_NewRandomAccessFile}
Creates a brand new random access read-only file with the specified name.
On success, stores a pointer to the new file in *result and returns OK. On failure stores NULL in *result and returns non-OK. If the file does not exist, returns a non-OK status.
The returned file may be concurrently accessed by multiple threads.
#### Status tensorflow::EnvWrapper::NewWritableFile(const string &f, WritableFile **r) override {#Status_tensorflow_EnvWrapper_NewWritableFile}
Creates an object that writes to a new file with the specified name.
Deletes any existing file with the same name and creates a new file. On success, stores a pointer to the new file in *result and returns OK. On failure stores NULL in *result and returns non-OK.
The returned file will only be accessed by one thread at a time.
#### Status tensorflow::EnvWrapper::NewAppendableFile(const string &f, WritableFile **r) override {#Status_tensorflow_EnvWrapper_NewAppendableFile}
Creates an object that either appends to an existing file, or writes to a new file (if the file does not exist to begin with).
On success, stores a pointer to the new file in *result and returns OK. On failure stores NULL in *result and returns non-OK.
The returned file will only be accessed by one thread at a time.
#### bool tensorflow::EnvWrapper::FileExists(const string &f) override {#bool_tensorflow_EnvWrapper_FileExists}
Returns true iff the named file exists.
#### Status tensorflow::EnvWrapper::GetChildren(const string &dir, std::vector< string > *r) override {#Status_tensorflow_EnvWrapper_GetChildren}
Stores in *result the names of the children of the specified directory. The names are relative to "dir".
Original contents of *results are dropped.
#### Status tensorflow::EnvWrapper::DeleteFile(const string &f) override {#Status_tensorflow_EnvWrapper_DeleteFile}
Deletes the named file.
#### Status tensorflow::EnvWrapper::CreateDir(const string &d) override {#Status_tensorflow_EnvWrapper_CreateDir}
Creates the specified directory.
#### Status tensorflow::EnvWrapper::DeleteDir(const string &d) override {#Status_tensorflow_EnvWrapper_DeleteDir}
Deletes the specified directory.
#### Status tensorflow::EnvWrapper::GetFileSize(const string &f, uint64 *s) override {#Status_tensorflow_EnvWrapper_GetFileSize}
Stores the size of fname in *file_size.
#### Status tensorflow::EnvWrapper::RenameFile(const string &s, const string &t) override {#Status_tensorflow_EnvWrapper_RenameFile}
Renames file src to target. If target already exists, it will be replaced.
#### uint64 tensorflow::EnvWrapper::NowMicros() override {#uint64_tensorflow_EnvWrapper_NowMicros}
Returns the number of micro-seconds since some fixed point in time. Only useful for computing deltas of time.
#### void tensorflow::EnvWrapper::SleepForMicroseconds(int micros) override {#void_tensorflow_EnvWrapper_SleepForMicroseconds}
Sleeps/delays the thread for the prescribed number of micro-seconds.
#### Thread* tensorflow::EnvWrapper::StartThread(const ThreadOptions &thread_options, const string &name, std::function< void()> fn) override {#Thread_tensorflow_EnvWrapper_StartThread}
Returns a new thread that is running fn() and is identified (for debugging/performance-analysis) by "name".
Caller takes ownership of the result and must delete it eventually (the deletion will block until fn() stops running).
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