1 files changed, 0 insertions, 120 deletions
diff --git a/sys/src/cmd/unix/drawterm/libc/lock.c b/sys/src/cmd/unix/drawterm/libc/lock.c
deleted file mode 100644
index 07d435256..000000000
--- a/sys/src/cmd/unix/drawterm/libc/lock.c
+++ /dev/null
@@ -1,120 +0,0 @@
-#include <u.h>
-#include <libc.h>
-
-#ifdef PTHREAD
-
-static pthread_mutex_t initmutex = PTHREAD_MUTEX_INITIALIZER;
-
-static void
-lockinit(Lock *lk)
-{
-	pthread_mutexattr_t attr;
-
-	pthread_mutex_lock(&initmutex);
-	if(lk->init == 0){
-		pthread_mutexattr_init(&attr);
-		pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_NORMAL);
-		pthread_mutex_init(&lk->mutex, &attr);
-		pthread_mutexattr_destroy(&attr);
-		lk->init = 1;
-	}
-	pthread_mutex_unlock(&initmutex);
-}
-
-void
-lock(Lock *lk)
-{
-	if(!lk->init)
-		lockinit(lk);
-	if(pthread_mutex_lock(&lk->mutex) != 0)
-		abort();
-}
-
-int
-canlock(Lock *lk)
-{
-	int r;
-
-	if(!lk->init)
-		lockinit(lk);
-	r = pthread_mutex_trylock(&lk->mutex);
-	if(r == 0)
-		return 1;
-	if(r == EBUSY)
-		return 0;
-	abort();
-}
-
-void
-unlock(Lock *lk)
-{
-	if(pthread_mutex_unlock(&lk->mutex) != 0)
-		abort();
-}
-
-#else 
-
-/* old, non-pthread systems */
-
-int
-canlock(Lock *lk)
-{
-	return !tas(&lk->key);
-}
-
-void
-lock(Lock *lk)
-{
-	int i;
-
-	/* easy case */
-	if(canlock(lk))
-		return;
-
-	/* for multi processor machines */
-	for(i=0; i<100; i++)
-		if(canlock(lk))
-			return;
-
-	for(i=0; i<100; i++) {
-		osyield();
-		if(canlock(lk))
-			return;
-	}
-
-	/* looking bad - make sure it is not a priority problem */
-	for(i=0; i<12; i++) {
-		osmsleep(1<<i);
-		if(canlock(lk))
-			return;
-	}
-
-	/* we are in trouble */
-	for(;;) {
-		if(canlock(lk))
-			return;
-		iprint("lock loop %ld: val=%d &lock=%ux pc=%p\n", getpid(), lk->key, lk, getcallerpc(&lk));
-		osmsleep(1000);
-	}
-}
-
-void
-unlock(Lock *lk)
-{
-	assert(lk->key);
-	lk->key = 0;
-}
-
-#endif
-
-void
-ilock(Lock *lk)
-{
-	lock(lk);
-}
-
-void
-iunlock(Lock *lk)
-{
-	unlock(lk);
-}