Is anyone familiar with ucontext?

[jcafaro10]

I'm trying to use ucontext to create a thread library but I'm segfaulting. I'm using the debugger so I know what the problem is but I don't really understand why. Using debugger I can see that the ucontext_ptr2 in Thread struct is always 0. The ucontext_ptr that I declared in the method however, does get a value but I just put that in as a test so when I call getContext it fails.

struct Thread
{
	char* stack;
	ucontext_t* ucontext_ptr;
	int heldLock;
	int blockedLock;
	int cv;
};

int thread_create(thread_startfunc_t func, void *arg)
{
	cout << "Creating Thread" << endl;
	Thread* t = new Thread;
	ucontext_t* ucontext_ptr2;
	t->heldLock = -1;
	t->blockedLock = -1;
	t->cv = -1;
	getcontext(t->ucontext_ptr);
//////more code

[matsp]

Never heard of it, but:
http://opengroup.org/onlinepubs/0079...context.h.html

--
Mats