WebGL2RenderingContext.clientWaitSync

The WebGL2RenderingContext.clientWaitSync() method of the WebGL 2 API blocks and waits for a WebGLSync object to become signaled or a given timeout to be passed.

Syntax

GLenum gl.clientWaitSync(sync, flags, timeout);

Parameters

sync

A WebGLSync object on which to wait on.

flags

A GLbitfield specifying a bitwise combination of flags controlling the flushing behavior. May be gl.SYNC_FLUSH_COMMANDS_BIT.

timeout

A GLint64 specifying a timeout (in nanoseconds) for which to wait for the sync object to become signaled. Must not be larger than gl.MAX_CLIENT_WAIT_TIMEOUT_WEBGL.

Return value

A GLenum indicating the sync object's status.

• gl.ALREADY_SIGNALED: Indicates that the sync object was signaled when this method was called.
• gl.TIMEOUT_EXPIRED: Indicates that the timeout time passed and that the sync object did not become signaled.
• gl.CONDITION_SATISFIED: Indicates that the sync object was signaled before the timeout expired.
• gl.WAIT_FAILED: Indicates that an error occurred during the execution.

Examples

var sync = gl.fenceSync(gl.SYNC_GPU_COMMANDS_COMPLETE, 0);
var status = gl.clientWaitSync(sync, 0, 0);

Specifications

Specification	Status	Comment
WebGL 2.0 The definition of 'clientWaitSync' in that specification.	Editor's Draft	Initial definition for WebGL.
OpenGL ES 3.0 The definition of 'glClientWaitSync' in that specification.	Standard	Man page of the (similar) OpenGL API.

Browser compatibility

See also

• WebGLSync