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//-----------------------------------------------------------------------------
// *! (C) Copyright International Business Machines Corp. 2014
// *! All Rights Reserved -- Property of IBM
// *! *** IBM Confidential ***
//-----------------------------------------------------------------------------
/// \file pk_core.c
/// \brief Core routines for the PK kernel.
///
/// The entry points in this file are routines that are expected to be needed
/// at runtime by all PK applications. This file also serves as a place for
/// kernel global variables to be realized.
#define __PK_CORE_C__
#include "pk.h"
#if !PK_TIMER_SUPPORT
/// If there is no timer support, then any call of the timer interrupt handler
/// is considered a fatal error.
void
__pk_timer_handler()
{
PK_PANIC(PK_NO_TIMER_SUPPORT);
}
#endif /* PK_TIMER_SUPPORT */
/// Initialize an PkDeque sentinel node
///
/// \param deque The sentinel node of the deque
///
/// PK has no way of knowing whether the \a deque is currently in use, so
/// this API must only be called on unitialized or otherwise unused sentinel
/// nodes.
///
/// \retval 0 success
///
/// \retval -PK_INVALID_DEQUE_SENTINEL The \a deque pointer was null
int
pk_deque_sentinel_create(PkDeque *deque)
{
if (PK_ERROR_CHECK_API) {
PK_ERROR_IF(deque == 0, PK_INVALID_DEQUE_SENTINEL);
}
deque->next = deque->previous = deque;
return 0;
}
/// Initialize an PkDeque element
///
/// \param element Typically the PkDeque object of a queable structure
///
/// PK has no way of knowing whether the \a element is currently in use, so
/// this API must only be called on unitialized or otherwise unused deque
/// elements.
///
/// \retval 0 success
///
/// \retval -PK_INVALID_DEQUE_ELEMENT The \a element pointer was null
int
pk_deque_element_create(PkDeque *element)
{
if (PK_ERROR_CHECK_API) {
PK_ERROR_IF(element == 0, PK_INVALID_DEQUE_ELEMENT);
}
element->next = 0;
return 0;
}
#undef __PK_CORE_C__
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