#define FOOLOS_MODULE_NAME "spinlock"

#include "lib/logger/log.h"
#include "spinlock.h"

// https://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html
#define NUMBER_SPINLOCKS 16


spinlock spinlocks[NUMBER_SPINLOCKS];

void check_spinlocks()
{
    log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"Spinlocks at 0x%08X ",spinlocks);
    for(int i=0;i<NUMBER_SPINLOCKS;i++)
    log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"%d",spinlocks[i]);
}


void lock_spin(spinlock i)
{

    spinlock *addr=spinlocks+i;
//    log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"locking %d (0x%08X)",i,addr);
    
    while(x86_xchg(addr,1));
}

void lock_release(spinlock i)
{

//    log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"unlocking %d",i);
    spinlock *addr=spinlocks+i;

    asm("movb $0,%0"::"m"(*addr));

}