- GLboolean glIsSync(GLsync sync);
- Specifies a value that may be the name of a sync object.
glIsSync returns GL_TRUE if sync is currently the name of a sync object. If sync is not the name of a sync object, or if an error occurs, glIsSync returns GL_FALSE. Note that zero is not the name of a sync object.
glIsSync is available only if the GL version is 3.2 or greater.
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