Project restructure

jni/resetprop/bionic_futex.h

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+/*
+ * Copyright (C) 2008 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.
+ */
+#ifndef _BIONIC_FUTEX_H
+#define _BIONIC_FUTEX_H
+
+#include <errno.h>
+#include <linux/futex.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <sys/cdefs.h>
+#include <sys/syscall.h>
+#include <unistd.h>
+
+__BEGIN_DECLS
+
+struct timespec;
+
+static inline __always_inline int __futex(volatile void* ftx, int op, int value,
+                                          const struct timespec* timeout,
+                                          int bitset) {
+  // Our generated syscall assembler sets errno, but our callers (pthread functions) don't want to.
+  int saved_errno = errno;
+  int result = syscall(__NR_futex, ftx, op, value, timeout, NULL, bitset);
+  if (__predict_false(result == -1)) {
+    result = -errno;
+    errno = saved_errno;
+  }
+  return result;
+}
+
+static inline int __futex_wake(volatile void* ftx, int count) {
+  return __futex(ftx, FUTEX_WAKE, count, NULL, 0);
+}
+
+static inline int __futex_wake_ex(volatile void* ftx, bool shared, int count) {
+  return __futex(ftx, shared ? FUTEX_WAKE : FUTEX_WAKE_PRIVATE, count, NULL, 0);
+}
+
+static inline int __futex_wait(volatile void* ftx, int value, const struct timespec* timeout) {
+  return __futex(ftx, FUTEX_WAIT, value, timeout, 0);
+}
+
+static inline int __futex_wait_ex(volatile void* ftx, bool shared, int value,
+                                  bool use_realtime_clock, const struct timespec* abs_timeout) {
+  return __futex(ftx, (shared ? FUTEX_WAIT_BITSET : FUTEX_WAIT_BITSET_PRIVATE) |
+                 (use_realtime_clock ? FUTEX_CLOCK_REALTIME : 0), value, abs_timeout,
+                 FUTEX_BITSET_MATCH_ANY);
+}
+
+__END_DECLS
+
+#endif /* _BIONIC_FUTEX_H */