gate_controlstream_t Interface Reference

A stream that offers access to its internal native resource handles. More...

#include <streams.h>

Inheritance diagram for gate_controlstream_t:

Public Member Functions
gate_result_t	can_read (gate_bool_t *return_value)
	Determines if a stream supports read() and/or peek() calls.
gate_result_t	can_write (gate_bool_t *return_value)
	Determines if a stream supports write() and/or flush() calls.
gate_result_t	get_size (gate_int64_t *return_value)
	Returns the currently known total content size of the stream, if available.
gate_result_t	get_available (gate_int64_t *return_value)
	Determines how many bytes can be read from the stream until its end is reached.
gate_result_t	seek (gate_int64_t position, gate_uint32_t origin, gate_int64_t *final_position)
	Moves the internal access pointer of a stream to a specific position.
gate_result_t	reset ()
	Resets the stream to the state, when it was opened or created.
gate_result_t	close (gate_uint32_t close_type)
	Closes or shuts down access to the contents of the stream.
Public Member Functions inherited from gate_resourcestream_t
gate_result_t	get_resource (gate_int32_t resource_type, gate_uintptr_t *resource_handle)
	Returns a resouce handle to the requested resource type (GATE_STREAM_RESOURCE_*)
Public Member Functions inherited from gate_stream_t
gate_result_t	read (char *buffer, gate_size_t bufferlength, gate_size_t *returned)
	Read bytes from stream and stores them in the given buffer.
gate_result_t	peek (char *buffer, gate_size_t bufferlength, gate_size_t *returned)
	Tries to read bytes from the stream, but leaves them in its input buffer to be read again.
gate_result_t	write (char const *buffer, gate_size_t bufferlength, gate_size_t *written)
	Writes bytes from the given buffer into the stream.
gate_result_t	flush ()
	Instructs the stream to flush its internal buffers and make current status persistent.
Public Member Functions inherited from gate_object_t
char const *	get_interface_name ()
	Returns on object's interface path name.
void	release ()
	Decrease object's reference counter, releases the object when count reaches zero.
int	retain ()
	Increase object's reference counter.

Detailed Description

A stream that offers access to its internal native resource handles.

Member Function Documentation

can_read()

gate_result_t can_read

(

gate_bool_t *

return_value

)

Determines if a stream supports read() and/or peek() calls.

Parameters

[out]

return_value

Pointer to boolean to be initialized with true, if stream is readable

Returns

GATE_RESULT_* result code

can_write()

gate_result_t can_write

(

gate_bool_t *

return_value

)

Determines if a stream supports write() and/or flush() calls.

Parameters

[out]

return_value

Pointer to boolean to be initialized with true, if stream is writable

Returns

GATE_RESULT_* result code

close()

gate_result_t close

(

gate_uint32_t

close_type

)

Closes or shuts down access to the contents of the stream.

Parameters

[in]

close_type

GATE_STREAM_CLOSE_* value defining which part of the stream should be closed

Returns

GATE_RESULT_* result code

get_available()

gate_result_t get_available

(

gate_int64_t *

return_value

)

Determines how many bytes can be read from the stream until its end is reached.

Parameters

[out]

return_value

Pointer to integer to be initialized with available/readable bytes in stream

Returns

GATE_RESULT_* result code

get_size()

gate_result_t get_size

(

gate_int64_t *

return_value

)

Returns the currently known total content size of the stream, if available.

Parameters

[out]

return_value

Pointer to integer to be initialized with total content size of stream

Returns

GATE_RESULT_* result code

reset()

gate_result_t reset

(

)

Resets the stream to the state, when it was opened or created.

Returns

GATE_RESULT_* result code

seek()

gate_result_t seek	(	gate_int64_t	position,
		gate_uint32_t	origin,
		gate_int64_t *	final_position )

Moves the internal access pointer of a stream to a specific position.

Parameters

[in]	position	Relative position in bytes within the stream relative to origin
[in]	origin	GATE_STREAM_SEEK_* value defining the origin of the move operation
[out]	final_position	Pointer to integer to be initialized with the absolute position within the stream (relative to begin)

Returns

GATE_RESULT_* result code

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The documentation for this interface was generated from the following file:

• src/gate/streams.h