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#include <time.h>
#include <pthread.h>
#include "thread_internal.h"
static void __pthread_acquire(int * spinlock)
{
int cnt = 0;
struct timespec tm;
while (__testandset(spinlock)) {
if (cnt < MAX_SPIN_COUNT) {
sched_yield();
cnt++;
} else {
tm.tv_sec = 0;
tm.tv_nsec = SPIN_SLEEP_DURATION;
__libc_nanosleep(&tm, 0);
cnt = 0;
}
}
}
void __pthread_lock(struct _pthread_fastlock * lock)
{
__pthread_acquire(&lock->__spinlock);
}
int __pthread_trylock(struct _pthread_fastlock * lock)
{
return __testandset(&lock->__spinlock);
}
int __pthread_unlock(struct _pthread_fastlock * lock)
{
return (lock->__spinlock = 0);
}
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