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75f3cb76190fe4e8796997e7c3d29af80fb36792 blob 284 bytes (raw)
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#include "pthread_impl.h"

static volatile int vmlock[2];

void __vm_wait()
{
	int tmp;
	while ((tmp=vmlock[0]))
		__wait(vmlock, vmlock+1, tmp, 1);
}

void __vm_lock()
{
	a_inc(vmlock);
}

void __vm_unlock()
{
	if (a_fetch_add(vmlock, -1)==1 && vmlock[1])
		__wake(vmlock, -1, 1);
}

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