IOStream.h File Reference

Detailed Description

NVIDIA DriveWorks API: IO Streams

Description: This file defines objects that wrap file and memory streams.

Definition in file IOStream.h.

Go to the source code of this file.

Typedefs
typedef struct dwIOStreamObject *	dwIOStreamHandle_t
	Stream handle. More...

Enumerations
enum	dwIOStreamFlags {   DW_IOSTREAM_READ = 1 << 0 ,   DW_IOSTREAM_WRITE = 1 << 1 ,   DW_IOSTREAM_APPEND = 1 << 2 }
	Enumerated type for IO Stream flags (read / write / append). More...

Functions
DW_API_PUBLIC dwStatus	dwIOStream_close (dwIOStreamHandle_t stream)
	Close a file stream that was opened with dwIOStream_openFile. More...
DW_API_PUBLIC dwStatus	dwIOStream_openFile (dwIOStreamHandle_t *stream, const char8_t *path, uint64_t flags, dwContextHandle_t context)
	Open a file stream with the given path and read / write parameters. More...
DW_API_PUBLIC dwStatus	dwIOStream_wrapFileDescriptor (dwIOStreamHandle_t *stream, int posixFd)
	Adopt a currently open POSIX file descriptor. More...

Typedef Documentation

dwIOStreamHandle_t

typedef struct dwIOStreamObject* dwIOStreamHandle_t

Stream handle.

Definition at line 68 of file IOStream.h.

Enumeration Type Documentation

dwIOStreamFlags

enum dwIOStreamFlags

Enumerated type for IO Stream flags (read / write / append).

Enumerator
DW_IOSTREAM_READ
DW_IOSTREAM_WRITE
DW_IOSTREAM_APPEND

Definition at line 59 of file IOStream.h.

Function Documentation

dwIOStream_close()

DW_API_PUBLIC dwStatus dwIOStream_close

(

dwIOStreamHandle_t

stream

)

Close a file stream that was opened with dwIOStream_openFile.

Parameters

stream

A dwIOStreamHandle_t to a currently open IO Stream handle.

Returns

DW_SUCCESS If the stream is successfully closed.
DW_INVALID_HANDLE If the stream is NULL.

API Group

• Init: Yes
• Runtime: No
• De-Init: Yes

dwIOStream_openFile()

DW_API_PUBLIC dwStatus dwIOStream_openFile	(	dwIOStreamHandle_t *	stream,
		const char8_t *	path,
		uint64_t	flags,
		dwContextHandle_t	context
	)

Open a file stream with the given path and read / write parameters.

Parameters

[out]	stream	A dwIOStreamHandle_t that will be updated with the newly opened IO Stream.
[in]	path	The path to the stream to be opened.
[in]	flags	The create flags used to open the stream.
[in]	context	The DriveWorks context.

Returns

DW_SUCCESS If the file is successfully opened and the stream is updated.
DW_INVALID_ARGUMENT If the stream is NULL.
DW_INVALID_HANDLE If the context is a nullptr.
DW_FILE_NOT_FOUND If the file could not be opened.
DW_FILE_INVALID If the requested flags are invalid for the file.

API Group

• Init: Yes
• Runtime: No
• De-Init: No

dwIOStream_wrapFileDescriptor()

DW_API_PUBLIC dwStatus dwIOStream_wrapFileDescriptor	(	dwIOStreamHandle_t *	stream,
		int	posixFd
	)

Adopt a currently open POSIX file descriptor.

Parameters

[out]	stream	A dwIOStreamHandle_t that will be updated with the newly adopted IO Stream.
[in]	posixFd	A POSIX file descriptor to a currently open file.

Returns

DW_SUCCESS If the POSIX file descriptor is successfully adopted.
DW_INVALID_ARGUMENT If the stream is NULL or the POSIX file descriptor is invalid.
DW_INVALID_HANDLE If the newly opened file stream is a nullptr and the stream output parameter cannot be updated.
DW_FAILURE If the stream fails to open the backing file.

Note

This function will allocate memory to hold the stream backed by the adopted file.

API Group

• Init: Yes
• Runtime: No
• De-Init: No