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#include <types.h>
#include <atomic.h>
#include <libk/stdio.h>
#include <heap.h>
void init_mutex(mutex_t* mutex)
{
mutex->addr = (uint64_t*)kalloc(sizeof(uint64_t));
*(mutex->addr) = 0;
}
bool test_and_set(mutex_t mutex, bool value)
{
bool rax;
__asm__ volatile ("lock xchg %%rax, (%%rbx);" : "=a"(rax) : "b"(mutex.addr), "a"(value));
return rax;
}
void lock(mutex_t mutex)
{
while (test_and_set(mutex, 1)) ;
}
void unlock(mutex_t mutex)
{
test_and_set(mutex, 0);
}
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