/*
Return starting address of stack segment.
*/
long
stack_start_addr()
{
jmp_buf env;
unsigned long addr;
(void)SETJMP(env);
addr = (long)JMP_BUF_SP(env);
PTR_DECRYPT(addr);
return addr & PAGE_MASK;
}
thread_id uthread_create(UTHREAD_START_ROUTINE start_routine,void* arg) {
thread_t *thread;
if(threads == 0) {
if(uthread_init() == UTHREAD_FAIL)
return UTHREAD_FAIL;
}
uthread_disable();
thread = uthread_alloc(start_routine,arg);
/* We save this point as new thread execution start. When we return here,
* we spawn the thread and start it's execution. */
/* JMP_BUF_SP(thread->stack) = ((long)uthread_stack_alloc())+UTHREAD_DEF_STACK_SIZE; */
if(sigsetjmp(thread->stack,1)) {
/* Execute this if we returned with siglongjmp. This will happen when
* jumping from alarm handler. */
uthread_spawn(current);
}
JMP_BUF_SP(thread->stack) = ((long)uthread_stack_alloc())+UTHREAD_DEF_STACK_SIZE;
uthread_enable();
return thread->id;
}
