kernel/spinlock.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18

#include "spinlock.h"
#include "kernel.h"

#include "asm_x86.h"

static volatile uint32_t spinlocks[NUMBER_SPINLOCKS];

void spinlock_spin(uint32_t i)
{
    uint32_t *addr=spinlocks+i;
    while(x86_xchg(addr,1));
}

void spinlock_release(uint32_t i)
{
    uint32_t *addr=spinlocks+i;
    asm("movb $0,%0"::"m"(*addr));
}