Introduce clock_nanosleep()

third_party/nsync/common.internal.h

@@ -1,5 +1,6 @@
 #ifndef NSYNC_COMMON_H_
 #define NSYNC_COMMON_H_
+#include "libc/assert.h"
 #include "third_party/nsync/atomic.h"
 #include "third_party/nsync/atomic.internal.h"
 #include "third_party/nsync/cv.h"
@@ -220,12 +221,12 @@ static const uint32_t NSYNC_WAITER_TAG = 0x726d2ba9;
 #define WAITER_IN_USE 0x2 /* waiter in use by a thread */
 
 #define CONTAINER(t_, f_, p_) ((t_ *)(((char *)(p_)) - offsetof(t_, f_)))
-#define ASSERT(x)             \
-  do {                        \
-    if (!(x)) {               \
-      *(volatile int *)0 = 0; \
-    }                         \
-  } while (0)
+
+#ifdef TINY
+#define ASSERT(x) _unassert(x)
+#else
+#define ASSERT(x) _npassert(x)
+#endif
 
 /* Return a pointer to the nsync_waiter_s containing nsync_dll_element_ *e. */
 #define DLL_NSYNC_WAITER(e)                 \

third_party/nsync/mu_semaphore_futex.c

@@ -15,6 +15,7 @@
 │ See the License for the specific language governing permissions and          │
 │ limitations under the License.                                               │
 ╚─────────────────────────────────────────────────────────────────────────────*/
+#include "libc/assert.h"
 #include "libc/errno.h"
 #include "libc/str/str.h"
 #include "libc/thread/thread.h"
@@ -30,13 +31,17 @@ Copyright 2016 Google, Inc.\\n\
 https://github.com/google/nsync\"");
 // clang-format off
 
+#ifdef TINY
+#define ASSERT(x) _unassert(x)
+#else
+#define ASSERT(x) _npassert(x)
+#endif
+
 /* Check that atomic operations on nsync_atomic_uint32_ can be applied to int. */
 static const int assert_int_size = 1 /
 	(sizeof (assert_int_size) == sizeof (uint32_t) &&
 	 sizeof (nsync_atomic_uint32_) == sizeof (uint32_t));
 
-#define ASSERT(x) do { if (!(x)) { *(volatile int *)0 = 0; } } while (0)
-
 struct futex {
 	int i;  /* lo half=count; hi half=waiter count */
 };