lock.c File Reference

#include <rtems.h>
#include <bsp.h>
#include <shm_driver.h>

Functions
void	Shm_Initialize_lock (Shm_Locked_queue_Control *lq_cb)
unsigned int	LEON3_Atomic_Swap (uint32_t value, uint32_t *address)
	__asm__ (".text\n" ".align 4\n" "LEON3_Atomic_Swap:\n" " retl\n" " swapa [%o1] 1, %o0\n")
void	Shm_Lock (Shm_Locked_queue_Control *lq_cb)
void	Shm_Unlock (Shm_Locked_queue_Control *lq_cb)

Detailed Description

LEON3 Shared Memory Lock Routines

This shared memory locked queue support routine need to be able to lock the specified locked queue. Interrupts are disabled while the queue is locked to prevent preemption and deadlock when two tasks poll for the same lock. previous level.