pthread_mutex_trylock usage

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glutbuttonboxfunc

glutButtonBoxFunc(3GLUT)					       GLUT						  glutButtonBoxFunc(3GLUT)

NAME

       glutButtonBoxFunc - sets the dial & button box button callback for the current window.

SYNTAX

       void glutButtonBoxFunc(void (*func)(int button, int state));

ARGUMENTS

       func	 The new button box callback function.

DESCRIPTION

       glutButtonBoxFunc  sets the dial & button box button callback for the current window. The dial & button box button callback for a window is
       called when the window has dial & button box input focus (normally, when the mouse is in the window) and the user generates dial  &  button
       box button presses. The button parameter will be the button number (starting at one). The number of available dial & button box buttons can
       be determined with glutDeviceGet(GLUT_NUM_BUTTON_BOX_BUTTONS). The state is either GLUT_UP or GLUT_DOWN indicating whether the callback was
       due to a release or press respectively.

       Registering  a  dial & button box button callback when a dial & button box device is not available is ineffectual and not an error. In this
       case, no dial & button box button callbacks will be generated.

       Passing NULL to glutButtonBoxFunc disables the generation of dial & button box button callbacks. When a new window is created,  no  dial  &
       button box button callback is initially registered.

SEE ALSO

       glutDialsFunc, glutDeviceGet, glutSpaceballButtonFunc, glutTabletButtonFunc

AUTHOR

       Mark J. Kilgard (mjk@nvidia.com)

GLUT
									3.7						  glutButtonBoxFunc(3GLUT)

Programming