_Handle Struct Reference

Information associated with a device handle. More...

#include <libwebcam/libwebcam.h>

Data Fields
Device *	device
	Pointer to the device structure associated with this handle.
int	open
	True if the handle is open (valid or invalid)
int	last_system_error
	The number of the last system error (e.g. a V4L2 return value)

Detailed Description

Information associated with a device handle.

Note that a handle can have three different states:

• Closed/free: The device handle is not being used by an application.
• Valid: The device handle is open by an application and points to a valid device.
• Invalid: The device handle is open by an application but does not point to a (valid) device anymore. This happens when a device is removed from the system but there are still open handles around. An "open" handle can be both valid or invalid.

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

• libwebcam/libwebcam.h