sleep/usleep: switch to trivial implementations.
Upstream keeps rearranging the deckchairs for these, so let's just
switch to the [roughly] one-liners rather than track that...
Test: treehugger
Change-Id: If655cf7a7f316657de44d41fadd43a8c55ee6f23
diff --git a/libc/bionic/sleep.cpp b/libc/bionic/sleep.cpp
new file mode 100644
index 0000000..fcfd9b2
--- /dev/null
+++ b/libc/bionic/sleep.cpp
@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <unistd.h>
+
+#include <time.h>
+
+unsigned sleep(unsigned s) {
+#if !defined(__LP64__)
+ // `s` is `unsigned`, but tv_sec is `int` on LP32.
+ if (s > INT_MAX) return s - INT_MAX + sleep(INT_MAX);
+#endif
+
+ timespec ts = {.tv_sec = static_cast<time_t>(s)};
+ return (nanosleep(&ts, &ts) == -1) ? ts.tv_sec : 0;
+}