Obsolete
This feature is obsolete. Although it may still work in some browsers, its use is discouraged since it could be removed at any time. Try to avoid using it.
The opaque PRThreadStack structure is only used in the third argument "PRThreadStack *stack" to the PR_AttachThread function. The 'stack' argument is now obsolete and ignored by PR_AttachThread. You should pass NULL as the 'stack' argument to PR_AttachThread.
Syntax
#include <prthread.h> typedef struct PRThreadStack PRThreadStack;