Non-SFI mode: Remove old Non-SFI code.

components/nacl/loader/nonsfi/irt_futex.cc

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include <errno.h>
-#include <linux/futex.h>
-#include <sys/syscall.h>
-#include <sys/time.h>
-#include <unistd.h>
-
-#include "components/nacl/loader/nonsfi/irt_interfaces.h"
-#include "components/nacl/loader/nonsfi/irt_util.h"
-#include "native_client/src/trusted/service_runtime/include/sys/time.h"
-
-namespace nacl {
-namespace nonsfi {
-namespace {
-
-// Converts a pair of NaCl's timespec of absolute time and host's timespec of
-// the current time to host's timespec of the relative time between them.
-// Note that assuming tv_nsec for the both input structs are non-negative,
-// the returned reltime's tv_nsec is also always non-negative.
-// (I.e., for -0.1 sec, {tv_sec: -1, tv_nsec: 900000000} will be returned).
-void NaClAbsTimeToRelTime(const struct nacl_abi_timespec& nacl_abstime,
-                          const struct timespec& now,
-                          struct timespec* reltime) {
-  reltime->tv_sec = nacl_abstime.tv_sec - now.tv_sec;
-  reltime->tv_nsec = nacl_abstime.tv_nsec - now.tv_nsec;
-  if (reltime->tv_nsec < 0) {
-    reltime->tv_sec -= 1;
-    reltime->tv_nsec += 1000000000;
-  }
-}
-
-int IrtFutexWaitAbs(volatile int* addr, int value,
-                    const struct nacl_abi_timespec* abstime) {
-  struct timespec timeout;
-  struct timespec* timeout_ptr = NULL;
-  if (abstime) {
-    // futex syscall takes relative timeout, but the ABI for IRT's
-    // futex_wait_abs is absolute timeout. So, here we convert it.
-    struct timespec now;
-    if (clock_gettime(CLOCK_REALTIME, &now))
-      return errno;
-    NaClAbsTimeToRelTime(*abstime, now, &timeout);
-
-    // Linux's FUTEX_WAIT returns EINVAL for negative timeout, but an absolute
-    // time that is in the past is a valid argument to irt_futex_wait_abs(),
-    // and a caller expects ETIMEDOUT.
-    // Here check only tv_sec since we assume time_t is signed. See also
-    // the comment for NaClAbsTimeToRelTime.
-    if (timeout.tv_sec < 0)
-      return ETIMEDOUT;
-    timeout_ptr = &timeout;
-  }
-  return CheckError(
-      syscall(SYS_futex, addr, FUTEX_WAIT_PRIVATE, value, timeout_ptr, 0, 0));
-}
-
-int IrtFutexWake(volatile int* addr, int nwake, int* count) {
-  return CheckErrorWithResult(
-      syscall(SYS_futex, addr, FUTEX_WAKE_PRIVATE, nwake, 0, 0, 0), count);
-}
-
-}  // namespace
-
-// For futex_wait_abs, the argument type should be nacl_abi_timespec. However,
-// the definition uses its host type, struct timespec. So, here we need to cast
-// it.
-const nacl_irt_futex kIrtFutex = {
-  reinterpret_cast<int(*)(volatile int*, int, const struct timespec*)>(
-      IrtFutexWaitAbs),
-  IrtFutexWake,
-};
-
-}  // namespace nonsfi
-}  // namespace nacl